阅读说明：本技术 耳机产测校准系统 (Earphone production measurement and calibration system ) 是由 黎兴荣 于 2021-07-29 设计创作，主要内容包括：本发明公开一种耳机产测校准系统,包括：待测耳机、测试设备以及至少一条通信信道,所述待测耳机包括用于接收测试信号并发出交互信号的第一调制收发模块；所述测试设备包括用于发出所述测试信号并接收所述交互信号的第二调制收发模块；至少一条通信信道位于所述待测耳机与所述测试设备之间,用于在所述待测耳机与所述测试设备之间进行数据信号和时钟信号的传输,以便所述测试设备根据所述测试信号和所述交互信号计算校准参数,对所述待测耳机进行产测校准。本申请旨在解决现有耳机产测中耳机的产品良率不高的问题。(The invention discloses a headset production testing and calibrating system, which comprises: the device comprises an earphone to be tested, test equipment and at least one communication channel, wherein the earphone to be tested comprises a first modulation transceiving module used for receiving a test signal and sending an interaction signal; the test equipment comprises a second modulation transceiving module used for sending the test signal and receiving the interaction signal; and at least one communication channel is positioned between the earphone to be tested and the test equipment and is used for transmitting data signals and clock signals between the earphone to be tested and the test equipment, so that the test equipment can calculate calibration parameters according to the test signals and the interaction signals and carry out production test calibration on the earphone to be tested. The problem that the product yield of earphone is not high in the present earphone production survey is aimed at solving.)

1. An earphone production calibration system, comprising:

the earphone to be tested comprises a first modulation transceiving module for receiving a test signal and sending an interaction signal;

the test equipment comprises a second modulation transceiving module used for sending the test signal and receiving the interaction signal;

and the communication channel is positioned between the earphone to be tested and the test equipment and is used for transmitting data signals and clock signals between the earphone to be tested and the test equipment so that the test equipment can calculate calibration parameters according to the test signals and the interaction signals and carry out production test calibration on the earphone to be tested.

2. The headset production test calibration system of claim 1, wherein the communication channel comprises a channel consisting of a first communication connector disposed on the headset under test and a second communication connector disposed on the test equipment and electrically connected to the first communication connector;

the earphone production test calibration system also comprises a first three-terminal switch device arranged on the earphone to be tested, a second three-terminal switch device arranged on the test equipment and a pull-down resistor;

the control end of the first three-terminal switch device is electrically connected with the first modulation transceiver module, the first end of the first three-terminal switch device is electrically connected with the first communication connecting piece and the first modulation transceiver module respectively, and the second end of the first three-terminal switch device is electrically connected with the energy supply module;

the control end of the second three-terminal switching device is electrically connected with the second modulation transceiver module, the first end of the second three-terminal switching device is electrically connected with the second communication connecting piece and the second modulation transceiver module respectively, and the second end of the second three-terminal switching device is electrically connected with the energy supply module;

the first end of the pull-down resistor is grounded, and the second end of the pull-down resistor is electrically connected with the first communication connecting piece or the second communication connecting piece;

the headset to be tested comprises a built-in loudspeaker and a built-in microphone, the test equipment comprises a test microphone for picking up the built-in loudspeaker, the interaction signal comprises a first response signal of the built-in microphone responding to the test signal, and the test microphone picks up a second response signal of the built-in loudspeaker.

3. The headset production calibration system of claim 2 wherein the first communication connection is a conductor connection on the headset under test except for a charging connection and the second communication connection is a conductor connection.

4. The headset production measurement and calibration system of claim 2, wherein the first communication connector is a charging connector of the headset to be tested, and the second communication connector is a conductor connector; the earphone production measurement and calibration system further comprises a third three-terminal switch device electrically connected between the first communication connector and the first three-terminal switch device; the earphone to be tested also comprises a charging module;

the control end of the third three-terminal switch device is electrically connected with the first modulation transceiving module, the first end of the third three-terminal switch device is electrically connected with the first communication connecting piece and the first end of the first three-terminal switch device respectively, and the second end of the third three-terminal switch device is electrically connected with the charging module.

5. The headset production test calibration system of claim 1, wherein the communication channel comprises a channel consisting of a third communication connector disposed on the headset under test and a fourth communication connector disposed on the test equipment and electrically connected to the first communication connector;

the earphone production test calibration system also comprises a fourth three-terminal switch device arranged on the earphone to be tested, a fifth three-terminal switch device arranged on the test equipment and a pull-up resistor;

a control end of the fourth three-terminal switching device is electrically connected with the first modulation transceiver module, a first end of the fourth three-terminal switching device is electrically connected with the third communication connecting piece and the first modulation transceiver module respectively, and a second end of the fourth three-terminal switching device is grounded;

a control end of the fifth three-terminal switching device is electrically connected with the second modulation transceiver module, a first end of the fifth three-terminal switching device is electrically connected with the fourth communication connecting piece and the second modulation transceiver module respectively, and a second end of the fifth three-terminal switching device is grounded;

a first end of the pull-up resistor is electrically connected with the energy supply module, and a second end of the pull-up resistor is electrically connected with the third communication connecting piece or the fourth communication connecting piece;

the headset to be tested comprises a built-in loudspeaker and a built-in microphone, the test equipment comprises a test microphone for picking up the built-in loudspeaker, the interaction signal comprises a first response signal of the built-in microphone responding to the test signal, and the test microphone picks up a second response signal of the built-in loudspeaker.

6. The headset production calibration system of claim 5 wherein the third communication connection is a conductor connection on the headset under test except for a charging connection, and the fourth communication connection is a conductor connection.

7. The earphone production measurement and calibration system according to claim 6, wherein the third communication connector is a charging connector of the earphone to be tested, and the fourth communication connector is a conductor connector; the earphone production measurement and calibration system further comprises a sixth three-terminal switching device electrically connected between the third communication connecting piece and the fourth three-terminal switching device; the earphone to be tested also comprises a charging module;

the control end of the sixth three-terminal switch device is electrically connected with the first modulation transceiving module, the first end of the sixth three-terminal switch device is electrically connected with the third communication connecting piece and the first end of the fourth three-terminal switch device respectively, and the second end of the sixth three-terminal switch device is electrically connected with the charging module.

8. The headset production test calibration system of claim 1, wherein the communication channel comprises a channel consisting of a first sub-communication connector and a second sub-communication connector provided on the headset to be tested, and a third sub-communication connector and a fourth sub-communication connector provided on the test equipment;

the first sub-communication connecting piece and the second sub-communication connecting piece are electrically connected with the first modulation transceiving module, and the first sub-communication connecting piece is electrically connected with the third sub-communication connecting piece and is used for forming a signal downlink channel of the testing equipment to the earphone to be tested;

the third sub-communication connecting piece and the fourth sub-communication connecting piece are electrically connected with the second modulation transceiving module, and the second sub-communication connecting piece is electrically connected with the fourth sub-communication connecting piece and used for forming a signal uplink channel of the to-be-tested earphone to the test equipment.

9. The headset production test calibration system of any one of claims 2-8, wherein the communication channel further comprises a channel consisting of a fifth communication connector disposed on the headset under test and a sixth communication connector disposed on the test equipment and electrically connected to the fifth communication connector;

the test equipment also comprises a first analog-to-digital converter and a control unit, wherein the first analog-to-digital converter is used for carrying out signal conversion on the test microphone; the control unit is electrically connected with the first analog-to-digital converter and the second modulation transceiving module respectively;

the fifth communication connecting piece is electrically connected with the clock unit, and the sixth communication connecting piece is electrically connected with the first analog-to-digital converter.

10. The headset production test calibration system of any one of claims 2-8, wherein the communication channel further comprises a channel comprising a seventh communication connection on the headset under test and an eighth communication connection on the test equipment and electrically connected to the seventh communication connection;

the earphone to be tested further comprises a second analog-to-digital converter for performing signal conversion on a second response signal picked up by the test microphone, and the test equipment further comprises a control unit; the control unit is electrically connected with the second modulation transceiving module respectively; the second analog-to-digital converter is electrically connected with the first modulation transceiving module;

the seventh communication connecting piece is electrically connected with the second analog-to-digital converter, and the eighth communication connecting piece is electrically connected with the test microphone.

11. The system of claim 1, wherein the communication channel comprises a channel formed by a first bluetooth module disposed in the headset to be tested and a second bluetooth module disposed in the testing device and communicatively connected to the second bluetooth module; the first Bluetooth module is electrically connected with the first modulation transceiver module; the second Bluetooth module is electrically connected with the second modulation transceiver module;

the earphone to be tested comprises a built-in loudspeaker and a built-in microphone, the test equipment comprises a test microphone for picking up the built-in loudspeaker, the interaction signal comprises a first response signal of the built-in microphone responding to the test signal, and the test microphone picks up a second response signal of the built-in loudspeaker;

the test equipment further comprises a first analog-to-digital converter for performing signal conversion on the test microphone, a control unit, and an asynchronous resampling module for synchronizing the test signal, the first response signal and the second response signal; the asynchronous resampling module is electrically connected with the control unit; the control unit is electrically connected with the first analog-to-digital converter and the second modulation transceiving module respectively.

12. The system of claim 11, wherein the communication channel further comprises a ninth communication connector disposed on the headset under test, and a tenth communication connector disposed on the test equipment and electrically connected to the ninth communication connector;

a ninth communication connector is electrically connected with the asynchronous resampling module; the tenth communication connecting piece is electrically connected with the first modulation transceiving module; the ninth communication connecting piece is a conductor connecting piece except the charging connecting piece on the earphone to be tested, and the tenth communication connecting piece is a conductor connecting piece.

Technical Field

The invention relates to the technical field of earphone production measurement, in particular to an earphone production measurement calibration system.

Background

Before the earphone leaves a factory, production testing is usually required, and the production testing comprises a frequency response performance test or a noise reduction performance test. The existing earphone production testing steps can be summarized as follows: (1) the testing equipment issues configuration to the earphone to be tested through the Bluetooth channel, so that the earphone to be tested enters a state to be tested; (2) the testing equipment sends a testing signal (for the frequency response performance test, the testing equipment sends the testing signal to a built-in loudspeaker of the earphone to be tested through a Bluetooth channel for playing; (3) for unqualified products, the testing equipment can exhaust all preset parameters and configure the preset parameters into the earphone to be tested until the products are judged to be qualified, or the testing equipment exhausts all the preset parameters and the products still cannot meet the factory standards, and then the products are judged to be unqualified.

The existing known production test scheme is that an earphone to be tested is configured according to preset parameters to test whether the earphone to be tested is qualified or not; the production and measurement method leads the earphone to be very sensitive to material tolerance and assembly process tolerance in the production process of the earphone, and the product yield is not high; even if a plurality of groups of preset parameters are set, configuration parameters corresponding to the optimal result are found out through a plurality of tests in the test process, the method can increase the test time, and due to the limited groups of preset parameters, all possible material tolerances and assembly tolerances cannot be covered, so that the improvement of the product yield is limited.

The above is only for the purpose of assisting understanding of the technical solutions of the present application, and does not represent an admission that the above is prior art.

Disclosure of Invention

The embodiment of the application aims at solving the problem that the product yield of the earphone is not high in the existing earphone production and measurement through providing the earphone production and measurement calibration system.

In order to achieve the above object, the present invention provides a calibration system for earphone production measurement, comprising:

the earphone to be tested comprises a first modulation transceiving module for receiving a test signal and sending an interaction signal;

the test equipment comprises a second modulation transceiving module used for sending the test signal and receiving the interaction signal;

and the communication channel is positioned between the earphone to be tested and the test equipment and is used for transmitting data signals and clock signals between the earphone to be tested and the test equipment so that the test equipment can calculate calibration parameters according to the test signals and the interaction signals and carry out production test calibration on the earphone to be tested.

According to the embodiment of the application, data signals and clock signals are transmitted between the earphone to be tested and the testing equipment through at least one communication channel, so that synchronous processing is completed between the testing signals and the interactive signals, and the testing equipment calculates customized calibration parameters matched with the difference of the electroacoustic characteristics (namely component tolerance, transducer tolerance and assembly tolerance) of the earphone to be tested according to the testing signals of the testing equipment and the interactive signals of the earphone to be tested and configures the customized calibration parameters to the earphone to be tested. Therefore, calibration compensation can be performed on each earphone to be detected in a targeted manner, namely, calibration parameters are accurately matched according to the specific conditions of component tolerance, transducer tolerance and assembly tolerance of the earphone to be detected, the customization of a frequency domain equalizer or a noise suppression filter of each earphone to be detected is realized, the consistency of quality indexes among different earphones to be detected is improved, and the yield of earphone detection is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic circuit diagram of an embodiment of a conventional headset production calibration system;

FIG. 2 is a schematic circuit diagram of an embodiment of a calibration system for earphone production measurement according to the present invention;

FIG. 3 is a schematic circuit diagram of another embodiment of a headset production measurement calibration system of the present invention;

FIG. 4 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 5 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 6 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 7 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 8 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 9 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 10 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 11 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 12 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 13 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

FIG. 14 is a schematic circuit diagram of another embodiment of a headset production calibration system of the present invention;

fig. 15 is a schematic circuit diagram of a headset production calibration system according to another embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, fig. 1 shows a conventional production and measurement scheme. The testing device 20a and the earphone 10a to be tested establish connection through Bluetooth, and the testing device 20a issues preset parameters to the earphone 10a to be tested, so that the earphone enters a state to be tested. For the earphone frequency response curve test, a test signal is issued to an earphone built-in loudspeaker through Bluetooth for playing, and data collected by a test microphone 22a to the built-in loudspeaker is analyzed to judge whether the test signal is qualified; for testing the earphone to be tested with the noise reduction function, the test loudspeaker 21a plays the test signal, and the data collected by the test microphone 22a is analyzed to determine whether the test signal is qualified.

The existing known production test scheme is that an earphone to be tested is configured according to preset parameters to test whether the earphone to be tested is qualified or not; the production and measurement method leads the earphone to be very sensitive to material tolerance and assembly process tolerance in the production process of the earphone, and the product yield is not high; even if a plurality of groups of preset parameters are set, configuration parameters corresponding to the optimal result are found out through a plurality of tests in the test process, the method can increase the test time, and due to the limited groups of preset parameters, all possible material tolerances and assembly tolerances cannot be covered, so that the improvement of the product yield is limited.

In view of this, the embodiment of the present application provides a calibration system for testing earphone production, which aims to solve the problem of low yield of earphone in the existing earphone production testing.

The first to ninth embodiments of the present application are provided in the following order

Example one

Referring to fig. 2 and 3, in an embodiment of the present invention, the headset production calibration system includes: the headset under test 10, the test device 20 and a bi-directional communication channel 100 for transmitting data signals and clock signals between the headset under test 10 and the test device 20.

The earphone 10 to be tested comprises a first modulation transceiver module 11 for receiving a test signal and sending an interaction signal, a built-in loudspeaker 13 and a built-in microphone 12, wherein the built-in microphone 12 is electrically connected with the first modulation transceiver module 11. The first modulation transceiving module 11 modulates response data of the built-in microphone 12 responding to the test signal and transmits the modulated response data to the second modulation transceiving module 24 of the test equipment 20.

In particular, the built-in microphone 12 includes a feed-forward microphone and/or a feedback microphone. In a feedforward noise suppression headphone, the built-in microphone 12 comprises a feedforward microphone; in a feedback noise-rejection headset, the built-in microphone 12 comprises a feedback microphone; in a hybrid noise-suppressing headphone, the built-in microphone 12 includes a feedforward microphone and a feedback microphone.

The testing device 20 comprises a second modulation transceiving module 24 for sending the testing signal and receiving the interaction signal, a testing loudspeaker 21 for sending the testing signal to the earphone 10 to be tested, and a testing microphone 22 for picking up a response signal of the built-in loudspeaker 13 of the earphone 10 to be tested.

At least one communication channel 100 is located between the earphone 10 to be tested and the test device 20, and is used for transmitting data signals and clock signals between the earphone 10 to be tested and the test device 20.

It should be noted that the test equipment 20 and the headset 10 under test form a complete common ground plane as a reference plane for two-way communication.

Taking a feedback noise suppression earphone as an example, the earphone 10 to be tested includes a built-in speaker 13, a feedback noise suppression filter, and a feedback microphone. The built-in loudspeaker 13, the feedback noise suppression filter and the feedback microphone are electrically connected in sequence to form a feedback path, and the test equipment 20 comprises a test microphone 22; the frequency range of the test signal is 20hz to 20000 hz; the production measurement and calibration method of the feedback noise suppression earphone comprises the following steps:

s100, controlling the test equipment 20 to send a test signal to the earphone 10 to be tested;

s200, acquiring a first response signal generated by the feedback microphone in response to the built-in loudspeaker 13 through a communication channel; acquiring a second response signal generated by the test microphone 22 in response to the built-in loudspeaker 13;

s300, performing synchronous processing on the test signal, the first response signal and the second response signal;

it should be noted that the earphone 10 to be tested further modulates the sampling clock signal of the built-in clock unit 40 and the data signal into a frame to be sent out to the test device 20, and transmits the data signal and the clock signal between the earphone 10 to be tested and the test device 20 through the communication channel to implement the synchronous processing of the test signal, the first response signal and the second response signal.

S400, calculating a first transfer function of the feedback path based on the test signal, the first response signal and the second response signal after synchronous processing;

s500, calculating calibration parameters of the feedback noise suppression filter according to the first transfer function and a first sub-preset target calibration function;

s600, sending the calibration parameters to the earphone 10 to be tested;

s700, controlling the earphone 10 to be tested to configure the calibration parameters to the feedback noise suppression filter of the earphone 10 to be tested, and controlling the test equipment 20 to test the configured earphone 10 to be tested.

Specifically, the specific steps of calculating the calibration parameters of the feedback noise suppression filter based on the test signal and the interaction signal (i.e. the first response signal and the second response signal) may refer to the invention patents filed on the same date as the present application, namely the method and the device for calibrating the earphone production test, the earphone test system and the storage medium. Similarly, the production test calibration of the feedforward noise-suppression headphone, the hybrid noise-suppression headphone, and the frequency domain equalizer (i.e., EQ filter) of the headphone can refer to the invention named headphone production test calibration method, device, headphone test system, and storage medium applied on the same day of the present application, and are not described herein again.

In this embodiment, data signals and clock signals are transmitted between the to-be-tested earphone 10 and the test device 20 through at least one communication channel, so that synchronous processing between the test signals and the interactive signals is completed, and the test device 20 calculates customized calibration parameters matched with differences (i.e., component tolerances, transducer tolerances, and assembly tolerances) of the electroacoustic characteristics of the to-be-tested earphone 10 according to the test signals of the test device 20 and the interactive signals of the to-be-tested earphone 10, and configures the customized calibration parameters to the to-be-tested earphone 10. Therefore, calibration compensation can be performed on each earphone 10 to be tested in a targeted manner, namely, calibration parameters are accurately matched according to the specific conditions of component tolerance, transducer tolerance and assembly tolerance of the earphone 10 to be tested, so that the customization of the frequency domain equalizer or the noise suppression filter of each earphone 10 to be tested is realized, the improvement of the consistency of quality indexes among different earphones 10 to be tested is realized, and the earphone detection yield is improved.

Specifically, in a possible embodiment, please refer to fig. 3, the communication channel includes a channel composed of a first communication connector 101 disposed on the headset 10 to be tested, and a second communication connector 102 disposed on the testing device 20 and electrically connected to the first communication connector 101. The first communication connector 101 is electrically connected to the first modulation transceiver module 11 to transmit data signals and clock signals to the test equipment 20. The second communication connection 102 is electrically connected to the first modulation transceiver module 11.

Specifically, the first communication connector 101 is a conductor connector of the headset 10 to be tested, except for a charging connector, and the second communication connector 102 is a conductor connector. The communication connection is realized by the direct contact of the first communication connector 101 of the headset to be tested 10 and the second communication connector 102 of the testing equipment 20.

It should be noted that in other embodiments, the first communication connector 101 and the second communication connector 102 may be connected in communication by an indirect connection electrically connected by a conductor (e.g., a wire).

The conductor connections may be metal contacts on the headset 10, the test equipment 20 to be tested. It should be understood that the conductor connecting element may also be other components of the headset 10 to be tested that can implement communication connection, such as a metal housing of the headset or a metal fitting that can conduct electricity on the housing.

The headset under test 10 comprises an internal loudspeaker 13 and an internal microphone 12, the test equipment 20 comprises a test microphone 22 for picking up the internal loudspeaker 13, the interaction signal comprises a first response signal of the internal microphone 12 in response to the test signal, and the test microphone 22 picks up a second response signal of the internal loudspeaker 13.

The earphone production test calibration system further comprises a first three-terminal switch device M1 arranged on the earphone 10 to be tested, a second three-terminal switch device M2 arranged on the test equipment 20, and a pull-down resistor R1;

a control terminal of the first three-terminal switching device M1 is electrically connected with the first modulation transceiver module 11, a first terminal of the first three-terminal switching device M1 is electrically connected with the first communication connector 101 and the first modulation transceiver module 11, respectively, and a second terminal of the first three-terminal switching device M1 is electrically connected with an energy supply module;

a control terminal of the second three-terminal switching device M2 is electrically connected to the second modulation transceiver module 24, a first terminal of the second three-terminal switching device M2 is electrically connected to the second communication connector 102 and the second modulation transceiver module 24, respectively, and a second terminal of the first three-terminal switching device M1 is electrically connected to an energy supply module;

it should be noted that the energy supply module described in the present application may be a stable voltage source providing a voltage of 1.0V to 5V, and is denoted by VDD in the present application.

A first end of the pull-down resistor is grounded, and a second end of the pull-down resistor is electrically connected to the first communication connector 101 or the second communication connector 102.

It should be noted that the first three-terminal switching device M1 and the second three-terminal switching device M2 may be MOS transistors or triodes. When MOS transistors are used as the first three-terminal switching device M1 and the second three-terminal switching device M2, NMOS transistors are preferable. The control end of the first three-terminal switching device M1 is the grid electrode of an NMOS tube, the first end is the source electrode of the NMOS tube, and the second end is the drain electrode of the NMOS tube. When the first three-terminal switching device M1 and the second three-terminal switching device M2 adopt triodes, NPN tubes are selected. The control terminal of the first three-terminal switching device M1 is the base electrode of the NPN transistor, the first terminal is the emitter electrode of the NPN transistor, and the second terminal is the collector electrode of the NPN transistor. The present embodiment is described with an NMOS transistor as an example.

The working principle of the communication between the earphone 10 to be tested and the testing device 20 in this embodiment is as follows: as long as the gate of either one of the first three-terminal switching device M1 and the second three-terminal switching device M2 is at a high level, the NMOS transistor is turned on, and the potentials of the first communication connector 101 and the second communication connector 102 are pulled to a high level, that is, the bus line appears as a digital '1'. Only when both gates are at low level, the first three-terminal switch device M1 and the second three-terminal switch device M2 are both turned off, and at this time, the bus is pulled down to low level by the pull-down resistor R1, i.e., the bus represents digital '0'.

For convenience of description, the present invention refers to the NMOS transistor turn-off behavior as bus release, and the bus state depends on the behavior of the device on the other side of communication: if the peer device NMOS transistor is also off, the bus is set to a digital '0' by the pull-down resistor R1, and if the peer device NMOS transistor is on, the bus is set to a digital '1'. The NMOS transistor turns on resulting in a bus pull-up behavior known as bus busy.

In order to ensure smooth bidirectional communication between the earphone 10 to be tested and the test equipment 20, in the embodiment of the present application, the test equipment 20 side is set as a master device, and the earphone 10 to be tested is set as a slave device. To prevent bus deadlock (the communicating parties occupy the bus at the same time and then release the bus at the same time), the communicating parties make the following conventions: (1) when both parties initiate bus occupation, the master device (i.e. the test device 20) can continue to transmit, and the slave device (i.e. the headset 10 to be tested) should immediately release the bus to receive the signal of the master device. A slave can only occupy the bus if the master does not. (2) After the communication parties send the information, the communication parties should release the bus immediately and must not occupy the bus. The purpose of bus agreement is to prevent the deadlock of the bus, and in order to achieve the purpose, a plurality of agreement modes can be provided; the contents of the convention should not be construed as limiting the present invention.

In addition, considering the communication rate and the power loss caused by the pull-down resistor R1 comprehensively, the value of the pull-down resistor R1 is generally 500 Ω -5k Ω, and the value of the pull-down resistor R1 is preferably 1k Ω in a preferred embodiment. The user can also make appropriate adjustments based on power consumption and transmission rate. It should be understood that the pull-down resistor R1 may be placed on the side of the test equipment 20, on circuitry within the headset, or even one each on the test equipment 20 and the headset 10 under test. In general, since the pull-down resistor R1 causes static power consumption and reduces the endurance time of the headset 10 under test, it is preferable to place it on the side of the test equipment 20.

At this time, the earphone 10 to be tested and the test equipment 20 perform single-wire high-speed communication through a communication channel formed by the first communication connector 101 and the second communication connector 102, and both the earphone 10 to be tested and the test equipment 20 perform data interaction of a synchronous frame structure under the same bus sampling clock.

In this embodiment, a channel formed by electrically connecting the first communication connector 101 and the second communication connector 102 is used to realize bidirectional transmission of a test signal and an interactive signal between the earphone 10 to be tested and the test device 20, the test signal and the interactive signal are synchronized, and the test device 20 calculates customized calibration parameters matched with the difference of the electroacoustic characteristics (i.e., component tolerance, transducer tolerance, and assembly tolerance) of the earphone 10 to be tested according to the test signal of the test device 20 and the interactive signal of the earphone 10 to be tested, and configures the customized calibration parameters to the earphone 10 to be tested. Therefore, calibration compensation can be performed on each earphone 10 to be tested in a targeted manner, namely, calibration parameters are accurately matched according to the specific conditions of component tolerance, transducer tolerance and assembly tolerance of the earphone 10 to be tested, so that the customization of the frequency domain equalizer or the noise suppression filter of each earphone 10 to be tested is realized, the improvement of the consistency of quality indexes among different earphones 10 to be tested is realized, and the earphone detection yield is improved.

Example two

Referring to fig. 4, the present embodiment is based on the first embodiment, and only the differences between the present embodiment and the first embodiment will be described below.

The first communication connecting piece 101 is a charging connecting piece of the earphone 10 to be tested, and the second communication connecting piece 102 is a conductor connecting piece; the headset production calibration system further comprises a third three-terminal switching device M3 electrically connected between the first communication connector 101 and the first three-terminal switching device M1; the headset to be tested 10 further comprises a charging module 30.

The charging connection may be a metal contact on the headset 10 under test for charging. The conductor connections may be metal contacts on the test equipment 20. It should be understood that the conductor connector may also be other components of the test device 20 that may enable communication connections, such as metal fittings on the test device 20 that may conduct electricity, etc. That is, the second communication connection 102 is a conductor connection on the test equipment 20; the first communication connection 101 is the power contact of the headset 10 under test. In the production test stage, the built-in circuits of the earphone 10 to be tested and the test equipment 20 perform duplex communication through a circuit formed by the first communication connector 101 and the second communication connector 102.

A control terminal of the third three-terminal switching device M3 is electrically connected to the first modulation transceiving module 11, a first terminal of the third three-terminal switching device M3 is electrically connected to the first communication connector 101 and a first terminal of the first three-terminal switching device M1, respectively, and a second terminal of the third three-terminal switching device M3 is electrically connected to the charging module 30.

It should be noted that the third three-terminal switching device M3 may be a MOS transistor or a triode. When the third three-terminal switching device M3 adopts a MOS transistor, a depletion PMOS transistor is preferable. The control end of the third three-terminal switching device M3 is the grid electrode of a PMOS tube, the first end is the drain electrode of the PMOS tube, and the second end is the source electrode of the PMOS tube. When the third three-terminal switching device M3 adopts a triode, a PNP transistor is selected. The control end of the third three-terminal switching device M3 is the base electrode of the PNP tube, the first end is the collector electrode of the PNP tube, and the second end is the emitter electrode of the PNP tube. In the present embodiment, a PNP tube is taken as an example for explanation.

In order to reduce the complexity of the structure of the headset 10 under test, it is necessary to construct the communication channel for the production calibration with as few existing metal contacts as possible. Thus, the power contacts of the headset 10 under test can be multiplexed as communication contacts during the production phase. In addition, the power supply contact may be multiplexed into another analog signal transmission line. The usage after multiplexing is not a determination condition for limiting the present invention.

The third three-terminal switching device M3 is a switching device built in the earphone, for example, a depletion PMOS transistor is used as the switching device, or the third three-terminal switching device M3 is integrated in the control chip of the earphone; the specific arrangement position of the third three-terminal switching device M3 on the earphone and the selection of the type of the third three-terminal switching device M3 cannot be defined as the limitations of the present invention.

In the production and test stage, the earphone 10 to be tested puts the gate of the third three-terminal switching device M3 at a low level, at this time, the PMOS transistor is in an off state, at this time, the charging module 30 built in the earphone is disconnected, and the power contact (i.e., the first communication connector 101) becomes a data communication contact. After the production test is finished, the earphone 10 to be tested puts the gate of the third three-terminal switching device M3 at a high level, the PMOS transistor is turned on, and the first communication connector 101 at this time is restored to the power contact for charging.

At this time, the earphone 10 to be tested and the test equipment 20 perform single-wire high-speed communication through a communication channel formed by the first communication connector 101 and the second communication connector 102, and both the earphone 10 to be tested and the test equipment 20 perform data interaction of a synchronous frame structure under the same bus sampling clock.

In the embodiment, the power contact on the headset 10 to be tested is multiplexed to serve as the first communication connector 101, the third three-terminal switching device M3 is arranged between the first communication connector 101 and the first three-terminal switching device M1, the third three-terminal switching device M3 serves as a switch for adjusting the data communication state or the charging state of the headset 10 to be tested, when the third three-terminal switching device M3 is turned on, the first communication connector 101 serves as the power contact to be communicated with the charging module 30 for charging, and when the third three-terminal switching device M3 is turned off, the first communication connector 101 serves as the data communication contact for data transmission. This embodiment enables multiplexing of charging and data communication of this power contact of the first communication connector 101. And the two-way communication between the earphone 10 to be tested and the test equipment 20 is realized through the first communication connector 101 and the second communication connector 102. The embodiment simplifies the design of the earphone 10 to be tested, and realizes production test calibration under the condition of not increasing metal contacts of the earphone.

EXAMPLE III

Referring to fig. 5, the headset under test 10 includes an internal speaker 13 and an internal microphone 12, the test equipment 20 includes a test microphone 22 for picking up the internal speaker 13, the interaction signal includes a first response signal of the internal microphone 12 in response to the test signal, and the test microphone 22 picks up a second response signal of the internal speaker 13.

The communication channel comprises a third communication connecting piece 107 arranged on the earphone 10 to be tested and a channel consisting of a fourth communication connecting piece 108 arranged on the testing equipment 20 and electrically connected with the third communication connecting piece 107. The third communication connector 107 is a conductor connector of the earphone 10 to be tested except for the charging connector, and the fourth communication connector 108 is a conductor connector. The communication connection is realized by the direct contact of the third communication connector 107 of the earphone 10 to be tested and the fourth communication connector 108 of the testing device 20.

It should be noted that, in some other embodiments, the third communication connection 107 and the fourth communication connection 108 may be connected in communication by an indirect connection electrically connected by a conductor (e.g., a wire).

The conductor connections may be metal contacts on the headset 10, the test equipment 20 to be tested. It should be understood that the conductor connecting element may also be other components of the headset 10 to be tested that can implement communication connection, such as a metal housing of the headset or a metal fitting that can conduct electricity on the housing.

The earphone production test calibration system further comprises a fourth three-terminal switch device M4 arranged on the earphone 10 to be tested, a fifth three-terminal switch device M5 arranged on the test equipment 20, and a pull-up resistor R2;

a control terminal of the fourth three-terminal switching device M4 is electrically connected to the first modulation transceiving module 11, a first terminal of the fourth three-terminal switching device M4 is electrically connected to the third communication connector 107 and the first modulation transceiving module 11, respectively, and a second terminal of the fourth three-terminal switching device M4 is grounded;

a control terminal of the fifth three-terminal switching device M5 is electrically connected to the second modulation transceiving module 24, a first terminal of the fifth three-terminal switching device M5 is electrically connected to the fourth communication connector 108 and the second modulation transceiving module 24, respectively, and a second terminal of the fifth three-terminal switching device M5 is grounded;

it should be noted that the fourth three-terminal switching device M4 and the fifth three-terminal switching device M5 may employ MOS transistors or triodes. When MOS transistors are used as the fourth three-terminal switching device M4 and the fifth three-terminal switching device M5, PMOS transistors are preferable. The control end of the fourth three-terminal switching device M4 is the gate of a PMOS transistor, the first end is the drain of the PMOS transistor, and the second end is the source of the PMOS transistor. The control end of the fifth three-terminal switching device M5 is the gate of a PMOS transistor, the first end is the drain of the PMOS transistor, and the second end is the source of the PMOS transistor. When the fourth three-terminal switching device M4 and the fifth three-terminal switching device M5 adopt triodes, PNP tubes are selected. The control end of the fourth three-terminal switching device M4 is the base electrode of the PNP tube, the first end is the emitter electrode of the PNP tube, and the second end is the collector electrode of the PNP tube. The control end of the fifth three-terminal switching device M5 is the base electrode of the PNP tube, the first end is the emitter electrode of the PNP tube, and the second end is the collector electrode of the PNP tube. In this embodiment, a PMOS transistor is taken as an example for explanation.

A first end of the pull-up resistor is electrically connected with the energy supply module, and a second end of the pull-up resistor is electrically connected with the third communication connection member 107 or the fourth communication connection member 108;

the working principle of the communication between the earphone 10 to be tested and the testing device 20 in this embodiment is as follows: for the fourth three-terminal switching device M4 and the fifth three-terminal switching device M5, if the gate of either one of them is at low level, the PMOS is turned on, and the potentials of the third communication connector 107 and the fourth communication connector 108 are pulled to low level, i.e., the bus appears as digital '0'; only when the gates of the fourth three-terminal switching device M4 and the fifth three-terminal switching device M5 are both at a high level, the fourth three-terminal switching device M4 and the fifth three-terminal switching device M5 are both turned off, and at this time, the bus is pulled high by the pull-up resistor R2, that is, the bus appears as a digital '1'.

For convenience of description, the present embodiment refers to the behavior of turning off the PMOS transistor as bus release, and the bus state depends on the behavior of the device on the other side of communication: if the opposite device PMOS is also off, the bus is set to a digital '1' by pull-up resistor R2, and if the opposite device PMOS is on, the bus is pulled down to a digital '0'. The conduction of the PMOS transistor causes a bus pull-down behavior, referred to as bus busy.

Considering the communication rate and the power loss caused by the resistor R2 comprehensively, the pull-up resistor R2 is generally recommended to be 500 Ω -5k Ω, and the pull-up resistor R2 is recommended to be 1k Ω in a preferred embodiment. The user can also make appropriate adjustments based on power consumption and transmission rate. The pull-up resistor R2 may be placed on the test device 20 side or on circuitry inside the headset, even with a pull-up resistor placed on both the test device 20 and the headset 10 to be tested. Generally, the pull-up resistor causes static power consumption and reduces the endurance time of the product, so that the pull-up resistor is preferably disposed on the side of the test device 20.

At this time, the earphone 10 to be tested and the test device 20 perform single-wire high-speed communication through a communication channel formed by the third communication connection element 107 and the fourth communication connection element 108, and both the earphone 10 to be tested and the test device 20 perform data interaction of a synchronous frame structure under the same bus sampling clock.

In this embodiment, a channel is formed by electrically connecting the third communication connector 107 and the fourth communication connector 108, so that bidirectional transmission of a test signal and an interactive signal is realized between the to-be-tested earphone 10 and the test device 20, synchronous processing is completed between the test signal and the interactive signal, and the test device 20 calculates customized calibration parameters matched with differences of electroacoustic characteristics (i.e., component tolerances, transducer tolerances, and assembly tolerances) of the to-be-tested earphone 10 according to the test signal of the test device 20 and the interactive signal of the to-be-tested earphone 10, and configures the customized calibration parameters to the to-be-tested earphone 10. Therefore, calibration compensation can be performed on each earphone 10 to be tested in a targeted manner, namely, calibration parameters are accurately matched according to the specific conditions of component tolerance, transducer tolerance and assembly tolerance of the earphone 10 to be tested, so that the customization of the frequency domain equalizer or the noise suppression filter of each earphone 10 to be tested is realized, the improvement of the consistency of quality indexes among different earphones 10 to be tested is realized, and the earphone detection yield is improved.

Example four

The present embodiment is based on the third embodiment, and only the differences between the present embodiment and the third embodiment will be described below.

Referring to fig. 6, the third communication connector 107 is a charging connector of the earphone 10 to be tested, and the fourth communication connector 108 is a conductor connector; the headset production calibration system further comprises a sixth three-terminal switching device M6 electrically connected between the third communication connection 107 and the fourth three-terminal switching device M4; the earphone 10 to be tested further comprises a charging module 30;

the charging connection may be a metal contact on the headset 10 under test for charging. The conductor connections may be metal contacts on the test equipment 20. It should be understood that the conductor connector may also be other components of the test device 20 that may enable communication connections, such as metal fittings on the test device 20 that may conduct electricity, etc. That is, the fourth communication connection 108 is a conductor connection on the test equipment 20; the third communication connection 107 is the power supply contact of the headset 10 under test. In the production test stage, the headset 10 to be tested and the built-in circuit of the test equipment 20 perform duplex communication through a line formed by the third communication connector 107 and the fourth communication connector 108.

A control terminal of the sixth three-terminal switching device M6 is electrically connected to the first terminal of the fourth three-terminal switching device M4, a first terminal of the sixth three-terminal switching device M6 is electrically connected to the third communication connector 107 and the first terminal of the fourth three-terminal switching device M4, respectively, and a second terminal of the sixth three-terminal switching device M6 is electrically connected to the charging module 30.

It should be noted that the sixth three-terminal switching device M6 may be a MOS transistor or a triode. When the sixth three-terminal switching device M6 adopts an MOS transistor, a depletion-mode PMOS transistor is preferred, so that in a default state of the module 11, the PMOS transistor is turned on, and 107 is a charging function; only in the case of production test, 11 controls M6 to be turned off, 107 is multiplexed as communication. The control end of the sixth three-terminal switching device M6 is the gate of a PMOS transistor, the first end is the drain of the PMOS transistor, and the second end is the source of the PMOS transistor. When the sixth three-terminal switching device M6 adopts a triode, a PNP transistor is selected. The control end of the sixth three-terminal switching device M6 is the base of the PNP transistor, the first end is the collector of the PNP transistor, and the second end is the emitter of the PNP transistor. In the present embodiment, a PNP tube is taken as an example for explanation.

In order to reduce the complexity of the structure of the headset 10 under test, as few existing metal contacts as possible are required to construct the communication channel for the production of the test calibration. Thus, the power contacts of the headset 10 under test can be multiplexed as communication contacts during the production phase. In addition, the power supply contact may be multiplexed into another analog signal transmission line. The usage after multiplexing is not a determination condition for limiting the present invention.

The sixth three-terminal switching device M6 is a switching device built in the earphone, for example, a depletion PMOS transistor is used as the switching device, or the sixth three-terminal switching device M6 is integrated in the control chip of the earphone; the specific location of the sixth three-terminal switching device M6 on the earphone is not a limitation of the present invention.

In the production and test stage, the earphone 10 to be tested puts the gate of the sixth three-terminal switching device M6 at a high level, at this time, the PMOS transistor is in an off state, at this time, the charging module 30 built in the earphone is disconnected, and the power contact (i.e., the third communication connection 107) becomes a data communication contact. After the production test is finished, the earphone 10 to be tested puts the gate of the sixth three-terminal switching device M6 at a low level, the PMOS transistor is turned on, and the third communication connection 107 at this time is restored to the power contact for charging. At this time, M4 is turned off, and the first modulation transceiver module 11 does not continue to operate.

In the production test phase, the earphone 10 to be tested and the test equipment 20 perform single-wire high-speed communication through a communication channel formed by the third communication connection member 107 and the fourth communication connection member 108, and both the earphone 10 to be tested and the test equipment 20 perform data interaction of a synchronous frame structure under the same bus sampling clock.

In the embodiment, the power contact on the earphone 10 to be tested is multiplexed to serve as the third communication connection 107, the sixth three-terminal switching device M6 is arranged between the third communication connection 107 and the fourth three-terminal switching device M4, the sixth three-terminal switching device M6 serves as a switch for adjusting the data communication state or the charging state of the earphone 10 to be tested, when the sixth three-terminal switching device M6 is turned on, the third communication connection 107 serves as the power contact to be communicated with the charging module 30 for charging, and when the sixth three-terminal switching device M6 is turned off, the third communication connection 107 serves as the data communication contact for data transmission. This embodiment enables multiplexing of the charging and data communication of this power contact of the third communication connection 107. And the two-way communication between the earphone 10 to be tested and the test equipment 20 is realized through the first communication connector 101 and the second communication connector 102. The embodiment simplifies the design of the earphone 10 to be tested, and realizes production test calibration under the condition of not increasing metal contacts of the earphone.

EXAMPLE five

Referring to fig. 7, the communication channel 100 includes a channel composed of a first sub-communication connector 103 and a second sub-communication connector 104 disposed on the earphone 10 to be tested, and a third sub-communication connector 105 and a fourth sub-communication connector 106 disposed on the testing device 20.

The first sub communication connector 103 and the second sub communication connector 104 are electrically connected to the first modulation transceiver module 11. The first sub-communication connector 103 is electrically connected to the third sub-communication connector 105, and is used for forming a signal downlink channel of the test equipment 20 to the earphone 10 to be tested;

it should be noted that the first sub communication connector 103 and the second sub communication connector 104 are electrically connected to the first modulation transceiver module 11, respectively. The first sub-communication connector 103 is electrically connected to the third sub-communication connector 105 to form a signal downlink channel of the testing device 20 to the to-be-tested earphone 10, and is configured to send the testing signal and the configuration parameter of the testing device 20 to the to-be-tested earphone 10. Wherein the test signal comprises white noise, random noise, pink noise, environmental noise, etc. The configuration parameters include EQ parameters set for a frequency domain equalizer, noise suppression parameters set for a noise suppression filter, and the like.

The third sub communication connector 105 and the fourth sub communication connector 106 are electrically connected to the second modulation transceiver module 24. The second sub-communication connector 104 is electrically connected to the fourth sub-communication connector 106, and is configured to form a signal uplink channel of the headset to be tested 10 to the test equipment 20. The third sub communication connector 105 and the fourth sub communication connector 106 are electrically connected to the second modulation transceiver module 24, respectively. The second sub-communication connector 104 is electrically connected to the fourth sub-communication connector 106 to form a signal uplink channel of the headset 10 to be tested to the testing device 20, so as to transmit the first response signal collected by the microphone 12 built in the headset to the testing device 20.

At this time, the headset to be tested 10 and the testing device 20 perform two-wire high-speed communication through a communication channel formed by the third sub-communication connector 105 and the fourth sub-communication connector 106, and the second sub-communication connector 104 and the fourth sub-communication connector 106, and both the headset to be tested 10 and the testing device 20 perform data interaction of a synchronous frame structure under the same bus sampling clock.

In this embodiment, the bidirectional communication channel between the earphone to be tested 10 and the test device 20 is split into a unidirectional signal downlink channel of the test device 20 to the earphone to be tested 10, which is formed by the first sub-communication connector 103 and the third sub-communication, and a unidirectional signal uplink channel of the earphone to be tested 10 to the test device 20, which is formed by the second sub-communication connector 104 and the fourth sub-communication. Namely, the two-way communication between the earphone 10 to be tested and the test equipment 20 is realized through two channels, so that the first modulation transceiver module 11 of the earphone 10 to be tested and the second modulation transceiver module 24 of the test equipment 20 do not need to perform two-way modulation of data, and the circuit design is simplified.

EXAMPLE six

The present embodiment is based on the first to fifth embodiments.

The communication channel further includes a fifth communication connector 113 disposed on the earphone 10 to be tested, and a sixth communication connector 114 disposed on the testing device 20 and electrically connected to the fifth communication connector 113. Specifically, the first communication connector 101 is a conductor connector of the headset 10 to be tested, except for a charging connector, and the second communication connector 102 is a conductor connector. The communication connection is realized by the direct contact of the fifth communication connector 113 of the earphone 10 to be tested and the sixth communication connector 114 of the test equipment 20.

It should be noted that, in some other embodiments, the fifth communication connector 113 and the sixth communication connector 114 may be connected in communication by an indirect connection electrically connected by a conductor (e.g., a wire).

The conductor connections may be metal contacts on the headset 10, the test equipment 20 to be tested. It will be appreciated that the conductor connection may also be other components that enable a communication connection, such as a metal housing of the headset or a metal fitting on the housing that may be conductive, etc.

The headset to be tested 10 further comprises a clock unit 40 for outputting a sampling clock signal, the test equipment 20 further comprises a first analog-to-digital converter 50 for signal conversion of an analog signal picked up by the test microphone 22 and a control unit 70; the control unit 70 is electrically connected to the first analog-to-digital converter 50 and the second modulation transceiver module 24, respectively.

The control unit 70 is a Central Processing Unit (CPU), and the processor 1001 may also be other general processors, such as: digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), other programmable logic devices, and the like.

The fifth communication connector 113 is electrically connected to the clock unit 40, and the fourth communication connector 108 is electrically connected to the first analog-to-digital converter 50.

Compared with the first to fifth embodiments, the fifth communication connector 113 and the sixth communication connector 114 are added to complete the transmission of the separate sampling clock signals. It is convenient for the control unit 70 of the test device 20 to synchronize the test signal and the interaction signal. The control unit 70 is based on calculating calibration parameters for the headset 10 under test.

In addition, since the sampling clock signal is transmitted by adopting an independent channel in the embodiment, the quality of the sampling clock is better, and the sampling performance is favorably improved. In addition, the second modulation transceiver module 24 of the testing device 20 and the first modulation transceiver module 11 inside the earphone are simpler in structure, and do not need to modulate and demodulate a clock.

This embodiment can be based on any of the first to fifth embodiments, since the first and second embodiments are similar to the third and fourth embodiments. Therefore, only the first embodiment, the second embodiment and the fifth embodiment will be described in an expanded manner. In some embodiments, referring to fig. 8, the communication channel includes two channels. Namely, the first communication connector 101 and the second communication connector 102 of the first embodiment constitute a communication channel, and the fifth communication connector 113 and the sixth communication connector 114 constitute a communication channel. The first communication connector 101 and the second communication connector 102 constitute a communication channel for data signal transmission. The fifth communication connection 113 and the sixth communication connection 114 carry out the transmission of the sampling clock signal. The embodiment of fig. 8 may be referred to in the description related to the method, system, storage medium, and program product for transmitting production test data of electronic products filed on even date herewith, which is incorporated herein by reference.

Alternatively, in some other embodiments, referring to fig. 9, the communication channels include three channels. The first sub communication connector 103 of the second embodiment is electrically connected to the third sub communication connector 105, and is configured to form a signal downlink channel of the test equipment 20 to the headset 10 to be tested. The second sub-communication connector 104 is electrically connected to the fourth sub-communication connector 106, and is configured to form a signal uplink channel of the headset to be tested 10 to the test equipment 20. A communication channel consisting of a fifth communication connection 113 and a sixth communication connection 114. The fifth communication connection 113 and the sixth communication connection 114 carry out the transmission of the sampling clock signal.

Alternatively, in some other embodiments, referring to fig. 10, the communication channel includes two channels. The first communication connector 101 of the third embodiment is a charging connector of the headset 10 to be tested, the first communication connector 101 and the second communication connector 102 of the third embodiment form a communication channel, and the fifth communication connector 113 and the sixth communication connector 114 form a communication channel. The first communication connector 101 and the second communication connector 102 constitute a communication channel for data signal transmission. The fifth communication connection 113 and the sixth communication connection 114 carry out the transmission of the sampling clock signal.

EXAMPLE seven

The present embodiment is based on the first to fifth embodiments.

The communication channel further includes a seventh communication connector 115 disposed on the earphone 10 to be tested, and an eighth communication connector 116 disposed on the testing device 20 and electrically connected to the seventh communication connector 115. Specifically, the seventh communication connector 115 is a conductor connector of the headset 10 to be tested, except for a charging connector, and the eighth communication connector 116 is a conductor connector. The communication connection is realized by the direct contact of the seventh communication connector 115 of the headset to be tested 10 and the eighth communication connector 116 of the testing device 20.

It should be noted that, in other embodiments, the seventh communication connector 115 and the eighth communication connector 116 may be communicatively connected by an indirect connection electrically connected by a conductor (e.g., a wire).

The conductor connections may be metal contacts on the headset 10, the test equipment 20 to be tested. It should be understood that the conductive connector may also be other components that can make a communication connection, such as a headset, a metal housing of the test device 20 or a metal fitting on the housing that can conduct electricity, etc.

The headset 10 to be tested further comprises a second analog-to-digital converter 60 for signal conversion of a second response signal picked up by the test microphone 22, and the test equipment 20 further comprises a control unit 70; the control unit 70 is electrically connected to the second modulation transceiver module 24; the second analog-to-digital converter 60 is electrically connected to the first modulation transceiver module 11. The seventh communication connection 115 is electrically connected to the second analog-to-digital converter 60, and the eighth communication connection 116 is electrically connected to the test microphone 22.

The control unit 70 is a Central Processing Unit (CPU), and the processor 1001 may also be other general processors, such as: digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), other programmable logic devices, and the like.

By connecting the eighth communication connection 116 with said test microphone 22 and the seventh communication connection 115 with the second analog-to-digital converter 60. Since the test signal clock and the test microphone 22 sampling clock are both internal to the headset in production calibration, there is no need to communicate the sampling clock signal between the test equipment 20 and the headset 10 under test in this embodiment.

Compared with the related embodiment in which the sampling clock signal needs to be transmitted in the sixth embodiment, the embodiment has the advantages that the sampling clock does not need to be transmitted, the sampling clock quality is high, and the final calibration effect is more accurate.

The present embodiment can be established on the basis of the first embodiment, and referring to fig. 11, the communication channel includes two channels. Namely, the first communication connector 101 and the second communication connector 102 of the first embodiment constitute a communication channel, and the seventh communication connector 115 and the eighth communication connector 116 constitute a communication channel. The first communication connector 101 and the second communication connector 102 constitute a communication channel for data signal transmission. The seventh communication connection 115 and the eighth communication connection 116 are in contact electrical connection for transferring the response signals picked up by the test microphone 22 to the headset 10 under test.

In other embodiments, the present embodiment can be based on the fifth embodiment, and referring to fig. 12, the communication channel includes three channels. The first sub communication connector 103 of the second embodiment is electrically connected to the third sub communication connector 105, and is configured to form a signal downlink channel of the test equipment 20 to the headset 10 to be tested. The second sub-communication connector 104 is electrically connected to the fourth sub-communication connector 106, and is configured to form a signal uplink channel of the headset to be tested 10 to the test equipment 20. A communication channel consisting of a seventh communication connection 115 and an eighth communication connection 116. The seventh communication connection 115 and the eighth communication connection 116 are in contact electrical connection for transferring the response signals picked up by the test microphone 22 to the headset 10 under test.

In other embodiments, the present embodiment may be based on the second embodiment, and referring to fig. 13, the communication channel includes two channels. In the second embodiment, the first communication connector 101 is a charging connector of the headset 10 to be tested. The first communication connector 101 and the second communication connector 102 of the second embodiment constitute a communication channel, and the seventh communication connector 115 and the eighth communication connector 116 constitute a communication channel. The first communication connector 101 and the second communication connector 102 constitute a communication channel for data signal transmission. The seventh communication connection 115 and the eighth communication connection 116 carry out the transmission of the sampling clock signal.

The power contact (i.e. the first communication connector 101) of the headset under test 10 is multiplexed as a communication contact, constituting a single-wire high-speed bi-directional channel with the second communication connector 102 on the test equipment. And newly added points on the earphone 10 to be tested are reduced, and the design is simplified. The channel completes the sending of the test signal of the test equipment 20 and reports the internal state information of the earphone 10 to be tested. In the implementation of the production test calibration, the calibration operation unit is disposed inside the earphone 10 to be tested, so that it is not necessary to report the signal picked up by the built-in microphone of the earphone 10 to be tested to the test device 20; the earphone 10 to be tested only needs to report the operation state and the operation result to the testing device 20.

Example eight

Referring to fig. 14, the communication channel includes a channel composed of a first bluetooth module 80 disposed in the headset 10 to be tested, and a second bluetooth module 90 disposed in the testing apparatus 20 and communicatively connected to the second bluetooth module 90; the first bluetooth module 80 is electrically connected with the first modulation transceiver module 11; the second bluetooth module 90 is electrically connected with the second modulation transceiver module 24;

wherein, the Bluetooth module is composed of a wireless transceiver (RF), a baseband controller (BB) and a link management Layer (LMP) of a Bluetooth protocol stack.

The headset under test 10 comprises an internal loudspeaker 13 and an internal microphone 12, the test equipment 20 comprises a test microphone 22 for picking up the internal loudspeaker 13, the interaction signal comprises a first response signal of the internal microphone 12 in response to the test signal, and the test microphone 22 picks up a second response signal of the internal loudspeaker 13;

the testing device 20 further comprises a first analog-to-digital converter 50 for performing signal conversion on the testing microphone 22, a control unit 70, and an asynchronous resampling module 91 for synchronizing the testing signal, a first response signal collected by the testing microphone 22 and transmitted by the built-in loudspeaker 13 of the earphone 10 to be tested, and a second response signal collected by the built-in microphone 12 of the earphone 10 to be tested; the asynchronous resampling module 91 is electrically connected with the control unit 70; the control unit 70 is electrically connected to the first analog-to-digital converter 50 and the second modulation transceiver module 24, respectively.

The control unit 70 is a Central Processing Unit (CPU), and the processor 1001 may also be other general processors, such as: digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), other programmable logic devices, and the like.

The asynchronous resampling module 91 may be implemented by a dedicated ASIC (Application Specific Integrated Circuit) chip, may also be implemented by software, and may also be implemented by an SOC (system on chip) or an FPGA (field programmable gate array) supporting asynchronous resampling. The implementation of asynchronous resampling is not a condition for limiting the present invention.

By establishing the channel formed by the first bluetooth module 80 and the second bluetooth module 90 inside the headset to be tested, the embodiment does not need to multiplex the communication channel established by the power contact, and does not need to add an additional communication channel established by a metal contact on the headset. The bluetooth channel formed by the first bluetooth module 80 and the second bluetooth module 90 is used to implement the sending of the test signal of the test device 20 and the uploading of the response signal picked up by the microphone built in the earphone 10 to be tested.

In order to complete the calculation of the electro-acoustic transfer function of the relevant path by using the formula h ═ IFFT (fft (x)/fft (y)), it is necessary to complete the synchronization of the test signal and the microphone-embedded acquisition response signal in the internal circuit of the test equipment 20, and this can be achieved by using the asynchronous resampling technique.

The second modulation transceiving module 24 of the testing device 20 receives the response signal picked up by the built-in microphone 12 of the earphone 10 to be tested, the response signal picked up by the built-in microphone 12 of the earphone 10 to be tested and the clock signal in the testing device 20 are input into the asynchronous resampling module 91 for asynchronous resampling, so that the testing signal, the first response signal and the second response signal are synchronized, and finally the control unit 70 of the testing device 20 calculates the calibration parameter based on the testing signal, the first response signal and the second response signal, so that the production test calibration of the earphone 10 to be tested is realized.

In this embodiment, a bluetooth channel formed by the first bluetooth module 80 and the second bluetooth module 90 is used as a basis for data transmission, and a power contact or a newly added contact of the to-be-tested earphone 10 does not need to be multiplexed, and a response signal reported by the to-be-tested earphone 10 and a test signal of the test equipment 20 are synchronized by matching with an asynchronous resampling technology, so that the test equipment 20 can calculate calibration parameters, and perform production test calibration on the to-be-tested earphone 10.

Example nine

The present embodiment is based on the ninth embodiment, and the difference between the present embodiment and the ninth embodiment is:

referring to fig. 15, the communication channel further includes a ninth communication connector 117 disposed on the earphone 10 to be tested, and a tenth communication connector 118 disposed on the testing device 20 and electrically connected to the ninth communication connector 117; a ninth communication connection 117 is electrically connected to the asynchronous resampling module 91; a tenth communication connection 118 is electrically connected to the first modulation transceiver module 11.

Specifically, the ninth communication connector 117 is a conductor connector of the headset to be tested 10 except for a charging connector, and the tenth communication connector 118 is a conductor connector. The communication connection is realized by the direct contact of the ninth communication connector 117 of the headset under test 10 and the tenth communication connector 118 of the test equipment 20.

It should be noted that, in other embodiments, the ninth communication connector 117 and the tenth communication connector 118 may be communicatively connected by an indirect connection electrically connected by a conductor (e.g., a wire).

The conductor connections may be metal contacts on the headset 10, the test equipment 20 to be tested. It should be understood that the conductive connector may also be other components that can make a communication connection, such as a headset, a metal housing of the test device 20 or a metal fitting on the housing that can conduct electricity, etc.

It should be noted that the ninth communication connector 117 of the present embodiment may also be a power contact, and it should be understood that when the ninth communication connector 117 selects the power contact, a three-terminal switching device, such as a PMOS transistor, for controlling the power contact to be used for charging or data transmission should be disposed between the power contact and the charging module 30. The connection mode of the three-terminal switching device, the power contact and the charging module 30 can refer to the third embodiment.

In the present embodiment, a channel formed by the ninth communication connector 117 and the tenth communication connector 118 is added to a channel formed by the first bluetooth module 80 and the second bluetooth module 90. The test device 20 sends a test signal to the headset 10 to be tested through a channel formed by the first bluetooth module 80 and the second bluetooth module 90, or sends configuration parameters to an EQ filter or a noise suppression filter of the headset 10 to be tested. The headset 10 under test sends the response signal picked up by the microphone 12 built in the headset 10 under test to the testing device 20 through the channel formed by the ninth communication connector 117 and the tenth communication connector 118.

By adding a channel consisting of the ninth communication link 117 and the tenth communication link 118 to the channel consisting of the first bluetooth module 80 and the second bluetooth module 90. Two channels are set for transmitting data signals and clock signals, the bandwidth of the channel to be tested produced by the earphone 10 to be tested is expanded, and the channel for production test calibration has enough bandwidth capacity.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.