阅读说明：本技术 基于多通道麦克风声学性能测试装置及方法 (Device and method for testing acoustic performance based on multi-channel microphone ) 是由 杨扬 赵志勇 张雄飞 张福涛 于 2019-08-28 设计创作，主要内容包括：本发明提供一种基于多通道麦克风声学性能测试装置及方法,包括探针卡工装、信号切换电路板以及测试机箱,其中,探针卡工装,用于将若干待测试麦克风的性能信号传输至信号切换电路板；信号切换电路板,用于将探针卡工装传输的若干待测试麦克风的性能信号分批次传输至所述测试机箱；测试机箱,用于对接收到的性能信号进行测试,获取每一个待测试麦克风的性能。利用本发明能够解决目前麦克风测试的效率低、成本高等问题。(The invention provides a device and a method for testing acoustic performance based on a multi-channel microphone, which comprises a probe card tool, a signal switching circuit board and a testing case, wherein the probe card tool is used for transmitting performance signals of a plurality of microphones to be tested to the signal switching circuit board; the signal switching circuit board is used for transmitting the performance signals of the microphones to be tested, which are transmitted by the probe card tool, to the testing case in batches; and the testing case is used for testing the received performance signals and acquiring the performance of each microphone to be tested. The invention can solve the problems of low efficiency, high cost and the like of the traditional microphone test.)

1. A multi-channel microphone acoustic performance testing device comprises a probe card tool, a signal switching circuit board and a testing case, wherein the probe card tool is connected with the signal switching circuit board through a signal wire, and the signal switching circuit board is connected with the testing case through a signal wire; wherein the content of the first and second substances,

the probe card tooling is used for transmitting the performance signal of the microphone to be tested to the signal switching circuit board;

the signal switching circuit board is used for transmitting the performance signals of the microphones to be tested, which are transmitted by the probe card tool, to the test case in batches;

the testing case is used for testing the received performance signals and obtaining the acoustic performance of each microphone to be tested.

2. The multi-channel microphone acoustic performance testing apparatus of claim 1, further comprising a computer host, wherein,

the computer host is respectively connected with the signal switching circuit board and the test case.

3. The multi-channel microphone acoustic performance testing device based on claim 1, wherein a plurality of circles of clamping grooves are arranged in the probe card tooling from inside to outside in sequence and used for placing microphones to be tested, wherein,

the number of the clamping grooves of the outer ring is more than that of the clamping grooves of the inner ring, and the structure and the size of each clamping groove are the same;

when the performance of the microphone to be tested is tested, the microphones to be tested are sequentially tested by switching the clamping grooves of the inner ring and the outer ring on the probe card tool.

4. The multi-channel microphone based acoustic performance testing apparatus of claim 1, wherein the signal switching circuit board comprises a relay module, a control module and a power module; wherein the content of the first and second substances,

the relay module is used for transmitting the signals of the microphones to be tested to the test case in batches;

the power supply module is used for providing a stable power supply for the signal switching circuit board;

and the control module is used for controlling the relay module to transmit the signals of the microphones to be tested to the test case in batches.

5. The multi-channel microphone based acoustic performance testing apparatus of claim 1, further comprising a signal relay PCB board, wherein,

the signal switching PCB is fixed with the probe card tool, and performance signals of a microphone to be tested of the probe card tool are transmitted to the signal switching circuit board through the signal switching PCB.

6. The multi-channel microphone based acoustic performance testing apparatus of claim 1, wherein the power supply module comprises a power supply filtering module, wherein,

the power supply filtering module is used for removing interference signals generated by an externally provided power supply and providing a stable power supply for the signal switching circuit board.

7. The multi-channel microphone acoustic performance testing device based on claim 1, wherein a USB communication control chip is further provided on the signal switching circuit board, wherein,

the USB communication control chip is connected with the computer host through a U-port line.

8. A multi-channel microphone based acoustic performance testing method, which is performed by using the multi-channel microphone based acoustic performance testing apparatus according to any one of claims 1-7, wherein the testing method comprises the following steps:

transmitting a performance signal of a microphone to be tested of a probe card tool to a signal switching circuit board, wherein the microphone to be tested is sequentially arranged on the probe card tool from inside to outside and distributed in a plurality of circles;

according to the received performance signals of the microphone to be tested, the signal switching circuit board controls the relay to transmit the performance signals of the microphone to be tested to the test case in batches;

the testing case tests the received performance signal of the microphone to be tested to obtain the acoustic performance of the microphone to be tested.

9. The multi-channel microphone acoustic performance testing method based on claim 8, wherein in the process that the signal switching circuit board control relay transmits the performance signal of the microphone to be tested to the testing case in batches,

the control module of the signal switching circuit board controls the relay of the relay module to transmit the performance signals of the microphone to be tested to the test case in batches, wherein,

when a performance signal of a microphone to be tested on the outer ring of the probe card tool is received, the control module controls the relay to transmit the performance signal of the microphone to be tested on the outer ring of the probe card tool to the test case;

when a performance signal of the microphone to be tested in the probe card tool is received, the control module controls the relay to transmit the performance signal of the microphone to be tested in the probe card tool to the test case.

Technical Field

The invention relates to the technical field of microphone testing, in particular to a device and a method for testing acoustic performance of a microphone based on multiple channels.

Background

At present, a laboratory tests microphone performance, a testing machine is adopted to test a single station, only one circle of microphones can be tested at a time, as shown in fig. 1, when the performance of a microphone is tested, only one circle of microphones can be placed on a probe card tool at each time, 24 microphones can be placed on the probe card tool 1 ' shown in fig. 1, the probe card tool 1 ' is used for placing the microphones to be tested, wherein the microphones to be tested are arranged and fixed on the probe card tool 1 ' in a circle, signals of 24 microphone products are transmitted to a testing case 3 ' through a signal switching PCB2 ' and a signal wire to test the microphone acoustic performance, and the testing case can only support 24 MICs for testing simultaneously, wherein the testing machine 3 ' case is connected with a computer host 4 ' through a serial port wire to realize the control of the testing.

In the above testing process, only 24 microphones can be tested in each test, which is inefficient and increases the cost.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a device and a method for testing acoustic performance of a microphone based on multiple channels, so as to solve the problems of low efficiency, high cost, and the like of the current microphone test.

The invention provides a multichannel microphone acoustic performance testing device, which comprises a probe card tool, a signal switching circuit board and a testing case, wherein the probe card tool is connected with the signal switching circuit board through a signal wire, and the signal switching circuit board is connected with the testing case through a signal wire; wherein the content of the first and second substances,

the probe card tooling is used for transmitting performance signals of a plurality of microphones to be tested to the signal switching circuit board;

the signal switching circuit board is used for transmitting the performance signals of the microphones to be tested, which are transmitted by the probe card tool, to the test case in batches;

the testing case is used for testing the received performance signals and acquiring the performance of each microphone to be tested.

In addition, the preferable proposal is that the system also comprises a computer host, wherein,

the computer host is respectively connected with the signal switching circuit board and the test case.

In addition, the preferable scheme is that a plurality of circles of clamping grooves are sequentially arranged on the probe card tool from inside to outside, the clamping grooves are used for placing a microphone to be tested, wherein,

the number of the clamping grooves of the outer ring is more than that of the clamping grooves of the inner ring, and the structure and the size of each clamping groove are the same;

when the performance of the microphone to be tested is tested, the microphones to be tested are sequentially tested by switching the clamping grooves of the inner ring and the outer ring on the probe card tool.

In addition, the signal switching circuit board preferably comprises a relay module, a control module and a power supply module; wherein the content of the first and second substances,

the relay module is used for transmitting the signals of the microphones to be tested to the test case in batches;

the power supply module is used for providing a stable power supply for the signal switching circuit board;

and the control module is used for controlling the relay module to transmit the signals of the microphones to be tested to the test case in batches.

In addition, it is preferable that the signal transmission device further comprises a signal transmission PCB, wherein,

the signal switching PCB is fixed with the probe card tool, and performance signals of a microphone to be tested of the probe card tool are transmitted to the signal switching circuit board through the signal switching PCB.

Further, it is preferable that the power supply module includes a power supply filtering module, wherein,

the power supply filtering module is used for removing interference signals generated by an externally provided power supply and providing a stable power supply for the signal switching circuit board.

In addition, the preferred scheme is that a USB communication control chip is further arranged on the signal switching circuit board and connected with a computer host through a U-port line.

The invention also provides a testing method based on the acoustic performance of the multi-channel microphone, which adopts the testing device based on the acoustic performance of the multi-channel microphone to test, wherein the testing method comprises the following steps:

transmitting a performance signal of a microphone to be tested of a probe card tool to a signal switching circuit board, wherein the microphone to be tested is sequentially arranged on the probe card tool from inside to outside and distributed in a plurality of circles;

according to the received performance signals of the microphone to be tested, the signal switching circuit board controls the relay to transmit the performance signals of the microphone to be tested to the test case in batches;

and the testing case tests the received performance signal of the microphone to be tested to acquire the performance of the microphone to be tested.

In addition, preferably, in the process that the signal switching circuit board controls the relay to transmit the performance signal of the microphone to be tested to the test case in batches,

the control module of the signal switching circuit board controls the relay of the relay module to transmit the performance signals of the microphone to be tested to the test case in batches, wherein,

when a performance signal of a microphone to be tested on the outer ring of the probe card tool is received, the control module controls the relay to transmit the performance signal of the microphone to be tested on the outer ring of the probe card tool to the test case;

when a performance signal of the microphone to be tested in the probe card tool is received, the control module controls the relay to transmit the performance signal of the microphone to be tested in the probe card tool to the test case.

According to the technical scheme, the multichannel microphone-based acoustic performance testing device and method provided by the invention have the advantages that a plurality of circles of clamping grooves are formed in a probe card tool, so that a plurality of microphones can be placed at one time for testing simultaneously; by adding the signal switching circuit board, more microphone performance tests can be realized under the condition of not adding a test box.

To the accomplishment of the foregoing and related ends, one or more aspects of the invention comprise the features hereinafter fully described. The following description and the annexed drawings set forth in detail certain illustrative aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Further, the present invention is intended to include all such aspects and their equivalents.

Drawings

Other objects and results of the present invention will become more apparent and more readily appreciated as the same becomes better understood by reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

fig. 1 is a schematic structural diagram of a conventional microphone acoustic performance testing device;

FIG. 2 is a schematic structural diagram of a multi-channel microphone based acoustic performance testing apparatus according to an embodiment of the present invention;

FIG. 3-1 is a schematic diagram of a probe card tooling structure according to an embodiment of the invention;

FIG. 3-2 is a schematic diagram of a second probe card tooling structure according to an embodiment of the invention;

FIGS. 4-1 and 4-2 are schematic diagrams of a switching structure of a relay according to an embodiment of the present invention;

fig. 5 is a flowchart of a method for testing acoustic performance of a multi-channel microphone according to an embodiment of the invention.

Wherein the reference numerals include: 1 ', a probe card tool, 2', a signal transfer PCB, 3 ', a test case, 4', a computer host, 1, a probe card tool, 2, a signal switching circuit board, 3, a test case, 4, a computer host, 11, a first circle of clamping grooves, 12, a second circle of clamping grooves, 13, a third circle of clamping grooves, 21, a relay module, 22, a power supply filtering module, 23, a control module, 24, a USB communication control chip, 5, and a signal transfer PCB.

The same reference numbers in all figures indicate similar or corresponding features or functions.

Detailed Description

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.

Aiming at the problems of low efficiency, high cost and the like of the conventional microphone test, the invention provides a device and a method for testing the acoustic performance of a microphone based on multiple channels.

Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In order to illustrate the structure of the multi-channel microphone based acoustic performance testing device provided by the present invention, fig. 2 to 4-2 respectively show the structure of the multi-channel microphone based acoustic performance testing device in different views. In particular, fig. 2 shows a structure of a multi-channel microphone based acoustic performance testing apparatus according to an embodiment of the present invention; FIG. 3-1 illustrates a first probe card tooling structure according to an embodiment of the present invention; 3-2 illustrate a second probe card tooling structure according to an embodiment of the invention; fig. 4-1 and 4-2 show a relay switching structure according to an embodiment of the present invention.

As shown in fig. 2, the device for testing acoustic performance based on a multi-channel microphone provided by the invention comprises: the probe card testing device comprises a probe card tool 1, a signal switching circuit board 2, a testing case 3 and a computer host 4, wherein the probe card tool 1 is electrically connected with the signal switching circuit board 2 through a signal wire, the signal switching circuit board 2 is connected with the testing case 3 through a signal wire, the computer host 4 is connected with the signal switching circuit board 2 through a U-port wire, and the computer host 4 is connected with the testing case 3 through a serial port wire.

The probe card tooling 1 is used for transmitting performance signals of a plurality of microphones to be tested to the signal switching circuit board 2; the signal switching circuit board 2 is used for transmitting performance signals of a plurality of microphones to be tested, which are transmitted by the probe card tool, to the testing case 3 in batches; and the testing case 3 is used for testing the received performance signals and acquiring the acoustic performance of each microphone to be tested.

In the embodiment shown in fig. 2, the device for testing acoustic performance of a microphone based on multiple channels provided by the present invention further includes a signal adapting PCB 5, the signal adapting PCB 5 is fixed to the probe card fixture 1, and a performance signal of a microphone to be tested of the probe card fixture 1 is transmitted to the signal switching circuit board 2 through the signal adapting PCB 5.

In the embodiment shown in fig. 2, a plurality of rings of slots are sequentially arranged from inside to outside in the probe card tool 1, the slots are used for placing microphones to be tested, wherein the number of the slots on the outer ring is more than that of the slots on the inner ring, and the structure and the size of each slot are the same; as shown in fig. 2, three rings of slots are arranged from inside to outside in the probe card tooling 1, the outermost ring of slots is the first ring of slots 11, the second outer ring of slots is the second ring of slots 12, and the innermost ring of slots is the third ring of slots 13.

When treating microphone capability test, will await measuring the microphone and all place the draw-in groove in through the suction nozzle, promptly: the microphones to be tested are placed in the first circle of clamping grooves 11, the second circle of clamping grooves 12 and the third circle of clamping grooves 13, the microphones to be tested are sequentially tested by switching the clamping grooves of the inner ring and the outer ring on the probe card tool 1, after the microphones to be tested in the first circle of clamping grooves 11 are tested, the microphones to be tested are automatically switched to the second circle of clamping grooves 12, the microphones to be tested in the second circle of slotting grooves 12 are tested, after the microphones to be tested in the first circle of clamping grooves 12 are tested, the microphones to be tested in the third circle of slotting grooves 13 are automatically switched to the third circle of clamping grooves 13, and the microphones to be tested are tested until all the microphones in the clamping grooves on the probe card tool 1 are tested.

In the embodiment shown in fig. 3-1, only two circles of slots are arranged on the probe card tool, the outer circle of slots is a first circle of slots 11, and the inner circle of slots is a second circle of slots 12, and in the embodiment shown in fig. 3-2, three circles of slots are arranged on the probe card tool, and from outside to inside, the first circle of slots 11, the second circle of slots 12 and the third circle of slots 13 are respectively arranged; in application, the number of the clamping grooves and the number of turns of the probe card tool are determined according to actual requirements and specifications of microphones to be tested, one turn, two turns or more turns of clamping grooves can be added on the probe card tool, and the purpose that more microphones to be tested are placed at one time to carry out acoustic performance testing is achieved.

In the embodiment shown in fig. 2, the signal switching circuit board 2 includes a relay module 21, a control module 23, and a power supply module.

The power supply module is used for providing a stable power supply for the signal switching circuit board; the power supply module includes a power supply filtering module 22, wherein the power supply filtering module 22 is configured to remove an interference signal generated by an externally provided power supply and provide a stable power supply for the signal switching circuit board 2. In the embodiment of the present invention, the external power supply supplies a stable 5V power to the signal switching circuit board 2.

And the control module 22 is used for controlling the relay module 21 to switch the performance signals of the microphones to be tested on the inner ring and the outer ring of the probe card tool 1. The signal switching circuit board 1 is further provided with a USB communication control chip 24, and the USB communication control chip 24 is connected with a computer host to realize the opening and closing of the relay.

And the relay module 21 is configured to transmit signals of the microphone to be tested to the test chassis 3 in batches. The relay module 21 includes a plurality of relays, and in the embodiment shown in fig. 2, 64 relays are provided on the circuit, which is illustrated by only one relay, and the relays can connect the product signal to the testing cabinet twice to perform the MIC performance test. When the microphone to be tested is tested, the microphone to be tested of the outer ring clamping groove of the probe card tool is firstly tested by default, then the microphone to be tested is sequentially tested from outside to inside, and the transmission of the microphone signals to be tested of the inner ring clamping groove and the outer ring clamping groove of the probe card tool is realized through the switching of the relay.

In the embodiment shown in fig. 4-1, the transmission of the microphone signal by the a and C signal lines to the test chassis 4 by the relay switching in the relay module 21 can be understood as follows: through relay switching, the signal lines A and C correspond to the signal line for transmitting the performance signal of the microphone to be tested on the outer ring, and the performance signal of the microphone to be tested on the outer ring of the probe card tool is transmitted to the test case 3; in the embodiment shown in fig. 4-2, the transmission of the microphone signal to the test chassis 4 by the B and D signal lines through the relay switch in the relay module 21 can be understood as follows: through relay switching, the B and D signal lines correspond to the signal line for transmitting the performance signal of the microphone to be tested in the inner ring, and the microphone signal to be tested in the inner ring of the probe card tool is transmitted to the test case 3.

Corresponding to the device, the invention also provides a method for testing the acoustic performance of the microphone based on multiple channels, and fig. 5 shows the flow of the method for testing the acoustic performance of the microphone based on multiple channels according to the embodiment of the invention.

As shown in fig. 5, the method for testing acoustic performance based on a multi-channel microphone provided by the present invention includes: the testing device based on the multichannel microphone acoustic performance is adopted for testing, wherein the testing method comprises the following steps:

s110: transmitting a performance signal of a microphone to be tested of a probe card tool to a signal switching circuit board, wherein the microphone to be tested is sequentially arranged on the probe card tool from inside to outside and distributed in a plurality of circles;

s120: according to the received performance signals of the microphone to be tested, the signal switching circuit board controls the relay to transmit the performance signals of the microphone to be tested to the test case in batches;

s130: the test case tests the received performance signal of the microphone to be tested to obtain the performance of the microphone to be tested.

In step S120, the control module of the signal switching circuit board controls the relay of the relay module to transmit the performance signal of the microphone to be tested to the test chassis in batches.

Specifically, when a performance signal of a microphone to be tested on the outer ring of the probe card tool is received, the control module controls the relay to transmit the performance signal of the microphone to be tested on the outer ring of the probe card tool to the test case, wherein the control module switches the relay to a signal line for transmitting the performance signal of the microphone to be tested on the outer ring of the probe card tool.

When a performance signal of a microphone to be tested in the probe card tool inner ring is received, the control module controls the relay to transmit the performance signal of the microphone to be tested in the probe card tool inner ring to the testing case, wherein the control module switches the relay to a signal wire for transmitting the performance signal of the microphone to be tested in the probe card tool inner ring.

In the process of testing the microphone to be tested, the microphone to be tested on the outer ring of the probe card tool is firstly tested by default, then the microphone to be tested is sequentially tested from outside to inside, wherein the relay is controlled to be switched through the control module, so that the transmission of the signals of the microphone to be tested on the clamping grooves of the inner ring and the outer ring of the probe card tool is realized.

According to the device and the method for testing the acoustic performance of the microphone based on the multiple channels, which are provided by the invention, the multiple circles of clamping grooves are arranged on the probe card tool, so that the microphones can be placed at one time for testing simultaneously; by adding the signal switching circuit board, more microphone performance tests can be realized under the condition of not adding a test box.

The acoustic performance testing apparatus and method based on a multi-channel microphone proposed according to the present invention are described above by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various modifications can be made to the device and method for testing acoustic performance of a microphone based on multiple channels without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.