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A system and method for testing the sensitivity of a small-sized hydrophone in air

A sensitivity testing and testing system technology, applied in the field of airborne sensitivity testing systems for small-sized hydrophones, can solve problems such as difficulty in low-frequency hydrophone displacement testing

Active Publication Date: 2021-05-14
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, displacement testing of low-frequency hydrophones is difficult to perform in the laboratory

Method used

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  • A system and method for testing the sensitivity of a small-sized hydrophone in air
  • A system and method for testing the sensitivity of a small-sized hydrophone in air
  • A system and method for testing the sensitivity of a small-sized hydrophone in air

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Embodiment

[0042] Embodiment: As shown in the accompanying drawings, this small-sized hydrophone sensitivity air test system mainly includes an acoustic calibration cavity 11, a test cavity 12, a measured array element 13, a monitoring accelerometer 14, and a vibration isolation system 15 , audio signal generator 16, audio power amplifier 17, data acquisition system 18, digital oscilloscope 19, trigger signal 20 and suitable for comparison method test required equipment, audio signal generator 16 transmits signal to isolation by connecting audio frequency power amplifier 17 The audio signal input line 6 of the sound box 10, the sound insulation box 10 is a test cavity 12 and is arranged in the sound calibration cavity 11, and a vibration isolation system 15 is arranged around the sound insulation box 10 for vibration isolation, which can prevent the sound insulation box 10 from The low-frequency vibration propagates to the ground to cause resonance, and the acoustic wave propagation chann...

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Abstract

The invention discloses a system and method for testing the sensitivity of a small-sized hydrophone in the air. The whole test system consists of a cavity in the air capable of generating the sound field required for the sensitivity test of the hydrophone, a vibration reduction and isolation system, and a test station suitable for the comparison method. It needs to be composed of instruments and equipment; the entire air acoustic cavity uses a combination of cavities of different shapes and sizes to change the propagation path of sound waves in the air to achieve control of sound waves, and to obtain a calibrated hydrophone array by controlling the propagation path and size of sound waves Sensitivity required for the sound field. The invention uses the specific sound field design in the air to realize the measurement of the sensitivity of the hydrophone in the air; uses the principle of the comparison method to solve the sound field and technical problems required for the measurement of the hydrophone unit in the air; uses the specific cavity design The technology realizes the control of the sound field propagation of the loudspeaker in the air, meets the needs of the hydrophone sensitivity test in the air, and effectively supplements the existing hydrophone sensitivity underwater acoustic test.

Description

technical field [0001] The invention relates to the field of in-air measurement of hydrophone sensitivity, in particular to an in-air test system and method for the sensitivity of a small-sized hydrophone. Background technique [0002] With the development of underwater acoustic technology, the application frequency of underwater acoustics gradually expands to low frequencies. In order to increase the long-range detection and early warning capabilities of underwater targets, it is especially necessary to solve the problem of effective detection of low-noise targets. The sonar array is gradually developing towards low frequency, large aperture, and high power. In order to achieve a sufficiently high transmission power or a sufficiently large receiving sensitivity in a limited space, the array elements are usually arranged in a dense arrangement in the design of the sonar array. Array. Especially the current models of sonar such as towed line array sonar and aviation buoy so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H3/00G01S7/52
CPCG01H3/005G01S7/52004
Inventor 平自红
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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