阅读说明：本技术 换能器指向性波束发生装置、检测系统及其检测方法 (Transducer directional beam generating device, detection system and detection method thereof ) 是由 杜慧如 于 2020-11-24 设计创作，主要内容包括：本发明涉及一种换能器检测系统,尤其是换能器指向性波束发生装置,包括：功率放大器,所述功率放大器设有一个,且分出一路主级信号和三路次级信号,所述主级信号与待测换能器的其中一个接口连接；及可调变压器,所述可调变压器设有三个,分别与所述三路次级信号连接,所述可调变压器的电压输出端分别与待测换能器的其余三个接口连接。本发明提供的一种换能器低频指向性检测系统价格便宜、重量小、使用方便。(The invention relates to a transducer detection system, in particular to a transducer directional beam generating device, which comprises: the power amplifier is provided with one power amplifier, and divides a primary signal and three secondary signals, and the primary signal is connected with one interface of the transducer to be tested; and three adjustable transformers are arranged and are respectively connected with the three secondary signals, and the voltage output ends of the adjustable transformers are respectively connected with the other three interfaces of the transducer to be tested. The transducer low-frequency directivity detection system provided by the invention is low in price, light in weight and convenient to use.)

1. A transducer directional beam generating device, comprising:

the power amplifier is provided with one power amplifier, and divides a primary signal and three secondary signals, and the primary signal is connected with one interface of the transducer to be tested; and

and three adjustable transformers are arranged and are respectively connected with the three secondary signals, and the voltage output ends of the adjustable transformers are respectively connected with the other three interfaces of the transducer to be tested.

2. The transducer directional beam generating apparatus of claim 1,

the power amplifier is connected with the three adjustable transformers, and the power amplifier is connected with the three adjustable transformers.

3. A transducer directional beam detection system, comprising:

the power amplifier is provided with one power amplifier, and divides a primary signal and three secondary signals, and the primary signal is connected with one interface of the transducer to be tested;

the three adjustable transformers are respectively connected with the three secondary signals, and the voltage output ends of the adjustable transformers are respectively connected with the other three interfaces of the transducer to be tested;

a standard hydrophone; and

and the multi-channel oscilloscope is respectively connected with the power amplifier, the three adjustable transformers and the standard hydrophone.

4. The transducer directional beam detection system of claim 3,

the multi-channel oscilloscope is characterized by further comprising a filter, wherein the filter is respectively connected with the standard hydrophone and the multi-channel oscilloscope.

5. A transducer directional beam detection method, comprising the steps of:

the signal source sends a signal to the power amplifier;

the power amplifier receives signals and respectively sends the signals to the transducer to be tested to drive one of the interfaces and three adjustable transformers, and the three adjustable transformers respectively send the adjusted signals to the other three interfaces of the transducer to be tested;

and the standard hydrophone detects the directional beam, and displays and records the detection result on the multi-channel oscilloscope.

Technical Field

The invention relates to a transducer detection system, in particular to a transducer directional beam generating device, a transducer directional beam detecting system and a transducer directional beam detecting method.

Background

For the transducer shown in fig. 2, four longitudinal vibrators share one central mass block, and interference of amplitudes and phases of sound waves emitted by four radiation heads can be utilized to obviously suppress sound pressure on one side of the transducer, and sound pressures on the other opposite sides are superposed to enable the transducer to generate directional beams, so that four paths of signals with different voltage amplitudes and phases need to be input into the transducer. It is common practice to use power amplifiers of four different channels to power the four circuits, and since the phase needs to be adjusted, the four circuits also need to be connected to a phase meter to unify the phase between the different signal circuits. Although the method is common and feasible, the method is inconvenient to use, needs four power amplifiers and one phase meter, and the power amplifiers are expensive and heavy, so that the method cannot be used in many cases.

Disclosure of Invention

In order to solve the problems, the invention provides a transducer low-frequency directivity detection system which is low in price, light in weight and convenient to use, and the specific technical scheme is as follows:

a transducer directional beam generating device comprising: the power amplifier is provided with one power amplifier, and divides a primary signal and three secondary signals, and the primary signal is connected with one interface of the transducer to be tested; and three adjustable transformers are arranged and are respectively connected with the three secondary signals, and the voltage output ends of the adjustable transformers are respectively connected with the other three interfaces of the transducer to be tested.

Furthermore, the power amplifier further comprises a multi-channel oscilloscope, and the multi-channel oscilloscope is respectively connected with the power amplifier and the three adjustable transformers.

A transducer directional beam detection system comprising: the power amplifier is provided with one power amplifier, and divides a primary signal and three secondary signals, and the primary signal is connected with one interface of the transducer to be tested; the three adjustable transformers are respectively connected with the three secondary signals, and the voltage output ends of the adjustable transformers are respectively connected with the other three interfaces of the transducer to be tested; a standard hydrophone; and the multi-channel oscilloscope is respectively connected with the power amplifier, the three adjustable transformers and the standard hydrophone.

And the filter is respectively connected with the standard hydrophone and the multi-channel oscilloscope.

A transducer directional beam detection method, comprising the steps of: the signal source sends a signal to the power amplifier; the power amplifier receives signals and respectively sends the signals to the transducer to be tested to drive one of the interfaces and three adjustable transformers, and the three adjustable transformers respectively send the adjusted signals to the other three interfaces of the transducer to be tested; and the standard hydrophone detects the directional beam, and displays and records the detection result on the multi-channel oscilloscope.

Compared with the prior art, the invention has the following beneficial effects:

the transducer low-frequency directivity detection system provided by the invention is low in price, light in weight and convenient to use.

Drawings

FIG. 1 is a block diagram of a transducer directional beam detection system;

FIG. 2 is a voltage distribution diagram of a transducer;

fig. 3 is a directional beam pattern at the matching frequency 2400 Hz.

Detailed Description

The invention will now be further described with reference to the accompanying drawings.

Example one

As shown in fig. 1 and 2, a transducer directional beam generating apparatus includes: the power amplifier is provided with one power amplifier, and divides a primary signal and three secondary signals, and the primary signal is connected with one interface of the transducer to be tested; and three adjustable transformers are arranged and are respectively connected with the three secondary signals, and the voltage output ends of the adjustable transformers are respectively connected with the other three interfaces of the transducer to be tested.

The power amplifier is connected with the three adjustable transformers, and the power amplifier is connected with the three adjustable transformers.

The power amplifier has one output and three outputs of three adjustable transformers, four paths of outputs are provided, the outputs are respectively connected with four interfaces of the transducer to be tested, the output floating value is freely changed by adjusting the transformation ratio of the transformers, and the transducer emits directional beams. Three power amplifiers are replaced by three adjustable transformers, so that the size, the gravity and the cost are greatly reduced, and the detection in practical application is facilitated.

The multi-channel oscilloscope is used for accurately adjusting the output value of the adjustable transformer.

Example two

As shown in fig. 1 and 2, a transducer directional beam detection system includes: the power amplifier is provided with one power amplifier, and divides a primary signal and three secondary signals, and the primary signal is connected with one interface of the transducer to be tested; the three adjustable transformers are respectively connected with the three secondary signals, and the voltage output ends of the adjustable transformers are respectively connected with the other three interfaces of the transducer to be tested; a standard hydrophone; and the multi-channel oscilloscope is respectively connected with the power amplifier, the three adjustable transformers and the standard hydrophone.

The multi-channel oscilloscope is characterized by further comprising a filter, wherein the filter is respectively connected with the standard hydrophone and the multi-channel oscilloscope.

EXAMPLE III

A transducer directional beam detection method, comprising the steps of: the signal source sends a signal to the power amplifier; the power amplifier receives signals and respectively sends the signals to the transducer to be tested to drive one of the interfaces and three adjustable transformers, and the three adjustable transformers respectively send the adjusted signals to the other three interfaces of the transducer to be tested; and the standard hydrophone detects the directional beam, and displays and records the detection result on the multi-channel oscilloscope.

Voltage distribution of transducer half-space directivity at 2400 Hz:

f(Hz)	Va(V)	Vb(V)	Vc(V)	Vd(V)
					2400	3.19	1	-1.19	1

the voltage distribution relationship in the table above is used to measure the half-space directivity by using the detection system and the detection method of the present invention, and the directional beam pattern at the matching frequency of 2400Hz is detected, as shown in fig. 3, it can be seen from fig. 2 that the overall directional beam pattern has good half-space directivity, the sound pressure ratio before and after the sound axis is about 13dB, and the beam width is about 150 degrees, which meets the requirement of wide beam directivity.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.