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Underwater normal sound energy flow measuring device capable of being installed on structure surface

A technology of structural surface and measuring device, which is applied in the direction of measuring device, vibration measurement in fluid, measuring vibration, etc., can solve problems such as unsatisfactory low-frequency vibration isolation effect and inaccurate sound pressure measurement, and achieve light weight, reduced impact, Measuring the effect of information diversification

Active Publication Date: 2022-03-04
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of simultaneous measurement of sound pressure and vibration when the acoustic energy flow on the surface of the structure is obtained, the accelerometer can be directly installed on the structure to measure the vibration, but the existing hydrophone is directly installed on the surface of the structure and is easily affected by the structural vibration. The sound pressure measurement is inaccurate. The side array sonar is a system installed on the side of the hull to measure the sound pressure, but the low-frequency vibration isolation effect is not ideal. It provides an underwater normal sound energy flow that can be installed on the surface of the structure. Measuring device, the concrete technical scheme that solves this problem is as follows:

Method used

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  • Underwater normal sound energy flow measuring device capable of being installed on structure surface
  • Underwater normal sound energy flow measuring device capable of being installed on structure surface
  • Underwater normal sound energy flow measuring device capable of being installed on structure surface

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specific Embodiment approach 1

[0013] Specific implementation mode one: combine figure 1 with figure 2 The present embodiment will be described. This embodiment is made up of vibration and sound pressure sensing module 1, data acquisition module 2, Fourier analysis module 3 and acoustic energy flow synthesis output module 4, the output end of vibration and sound pressure sensing module 1 and the input of data acquisition module 2 Terminal connection, the output terminal of data acquisition module 2 is connected with the input terminal of Fourier analysis module 3, and the output terminal of Fourier analysis module 3 is connected with acoustic energy flow synthesis output module 4 input terminals;

[0014] The vibration and sound pressure sensing module 1 consists of a cover 1-1, a piezoelectric element 1-2, a decoupling element 1-3, an accelerometer 1-4, a sound pressure signal output interface 1-5, and an accelerometer signal output Interface 1-6, signal leads 1-7 and base 1-8, the piezoelectric element...

specific Embodiment approach 2

[0018] Specific implementation mode two: combination figure 1 with figure 2 The present embodiment will be described. The accelerometer 1-4 and the piezoelectric element 1-2 described in this embodiment are compounded by the decoupling element 1-3. It effectively isolates the direct impact of structural vibration on the piezoelectric element, and the entire sensing module can be directly fixed and installed on the surface of the structure to measure vibration acceleration and sound pressure signals. The lighter the accelerometer, the smaller the volume of the accelerometer, the more conducive to reducing the structural vibration and sound field changes of the accelerometer itself; the smaller the Young's modulus of the decoupling element, the more conducive to reducing the impact of the accelerometer vibration on the piezoelectric element. However, it is not conducive to underwater pressure. When used in deep water, the decoupling effect will be reduced due to the compactio...

specific Embodiment approach 3

[0019] Specific implementation mode three: combination figure 1 with figure 2 The present embodiment will be described. The cover body 1-1 described in this embodiment adopts sound-transmitting rubber and the base 1-8 to be vulcanized and packaged, and the acoustic impedance of the sound-transmitting rubber is consistent with that of water, so as to facilitate sound transmission.

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Abstract

The invention discloses an underwater normal sound energy flow measuring device capable of being installed on the surface of a structure, and relates to the technical field of sonar detection. The defects in the prior art are overcome. The system is composed of a vibration and sound pressure sensing module, a data acquisition module, a Fourier analysis module and a sound energy flow synthesis output module. The device has the advantages that the decoupling element is arranged between the piezoelectric element and the accelerometer, the piezoelectric element adopts a radial polarization mode, and the design greatly reduces the direct influence of structural vibration on the piezoelectric element, so that the device can be directly fixedly mounted on the surface of an underwater structure to measure the normal sound energy flow of the surface; the vibration and sound pressure signal sensing module has the advantages of being small in size, light in weight, simple in structure and easy to install, and the influence of elements on structural vibration and a sound field can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of sonar detection, in particular to an underwater normal acoustic energy flow measuring device that can be installed on the surface of a structure. Background technique [0002] At present, the acoustic monitoring of the underwater structure surface is of great significance for the real-time assessment of the noise radiation level of the underwater structure and the active control of the underwater sound field. Obtaining the acoustic energy flow on the surface of the structure needs to measure the surface vibration velocity and sound pressure of the structure at the same time. It is a measurement system that can be directly installed on the surface of the structure to measure the normal acoustic energy flow on the surface of the structure. The measurement of the surface vibration velocity of the structure can be directly measured by the accelerometer, and then obtained by time domain integration or frequenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H3/00G01H11/08
CPCG01H3/00G01H11/08
Inventor 张超周志豪商德江李鹏程肖妍
Owner HARBIN ENG UNIV
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