Sensitivity testing apparatus for hydrophone

A technology for sensitivity testing and hydrophones, applied in the direction of measuring devices, instruments, measuring vibrations, etc., can solve problems such as errors, inconvenience, and low accuracy, and achieve the goal of narrowing the error range, improving accuracy, and improving testing efficiency Effect

Inactive Publication Date: 2012-09-12
天津市远海声学仪器有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the comparison method is that the accuracy is low, because the test height of the hydrophone to be tested and the standard hydrophone must be the same to be comparable, and there is usually an error in this height, and it is necessary to use an oscilloscope in the laboratory Sensitivity test done with inconvenience

Method used

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  • Sensitivity testing apparatus for hydrophone
  • Sensitivity testing apparatus for hydrophone
  • Sensitivity testing apparatus for hydrophone

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Embodiment Construction

[0022] The present invention will be described below in conjunction with the accompanying drawings and embodiments.

[0023] see figure 1 , the hydrophone sensitivity testing device of the present invention, at first comprises a liquid column test container placed on the vibrating table 6, and it comprises a rigid wall circular tube 1 with an inner diameter far smaller than the sound wave wavelength of the liquid in the tube, with an open end, containing There is liquid at a certain height as the measurement medium, and the entire liquid column test container is driven by a vibrating table 6 that can vibrate sinusoidally, and the hydrophone 3 that needs to test the sensitivity is suspended on a support, and is vertically suspended at the center of the liquid column in the container axis. The vibrating table 6 is fixedly connected to the bottom of the rigid-walled circular pipe 1 through a flange 4 . An accelerometer is fixedly installed at the bottom of the rigid wall tube 1...

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Abstract

The invention belongs to the underwater sensing field, and especially relates to a sensitivity testing apparatus for a hydrophone. The apparatus comprises a shake table, a rigid wall circular pipe containing a measure medium, an accelerometer, a support and a computer, wherein one end of the rigid wall circular pipe is open and the bottom of the rigid wall circular pipe is fixedly connected onto the shake table and is fixed with the accelerometer. The hydrophone which needs to be tested is hanged on the support and perpendicularly hanged on central axis of a liquid column of a container. The computer controls the shake table through a signal-generator and a power amplifier. An output signal of the accelerometer and an output signal of the hydrophone which needs to be tested are sent into the computer after conditioning respectively by two signal conditioning circuits. The computer computes the sensitivity of the hydrophone based on the value of the two input signals. The invention can reduce the error range and raise the accuracy of sensitivity testing.

Description

technical field [0001] The invention belongs to the field of underwater acoustic sensing, in particular to a hydrophone sensitivity testing device. technical background [0002] Hydrophones, also known as underwater microphones, are transducers that convert underwater acoustic signals into electrical signals. According to different working principles, energy conversion principles, characteristics and structures, there are sound pressure, vibration velocity, non-direction, and pointing , piezoelectric, magnetostrictive, electric (moving coil) and other hydrophones. Hydrophones and microphones have many similarities in principle and performance, but due to the difference in sound transmission media, hydrophones have a solid impermeable structure and must use waterproof cables made of corrosion-resistant materials. [0003] As the most widely used and most important device in underwater acoustics, hydrophones are often used in seabed exploration equipment and various cable equ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H3/00
Inventor 涂本良窦红兵丁传勇
Owner 天津市远海声学仪器有限公司
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