Optical testing method for mutual radiation impedance of underwater acoustic array

A mutual radiation impedance and optical testing technology, applied in the direction of measuring mechanical impedance, using wave/particle radiation, measuring devices, etc., can solve problems such as impedance, achieve accurate evaluation of radiation impedance, solve accurate testing, and overcome the effect of quality influence

Inactive Publication Date: 2018-07-31
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology

[0003] In order to overcome the deficiencies of the existing interventional sound-based array radiation impedance testing method, the project of the present invention provides an optical test method for underwater acoustic-based array mutual

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  • Optical testing method for mutual radiation impedance of underwater acoustic array
  • Optical testing method for mutual radiation impedance of underwater acoustic array
  • Optical testing method for mutual radiation impedance of underwater acoustic array

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with accompanying drawing:

[0017] Due to the influence of size, underwater acoustic arrays usually adopt dense arrays. Especially when working at low frequencies, since the distance between the array elements does not meet the 1 / 4 wavelength, there is an influence of mutual radiation between the array elements. This effect will reduce the working efficiency of the base array, and will damage the base array in severe cases. Usually, the intervening mutual radiation test method can be used to test at low frequency and low power. But most of the modern new sonars work at low frequency and high power. The existing intrusive test system will destroy the test equipment under any high power, and bring errors to the measured acoustic array. However, non-interventional optical methods are used to test the mutual radiation impedance of underwater acoustic arrays. We use laser vibrometers to test underwate...

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Abstract

The invention belongs to the basic field of underwater acoustic testing technologies, and mainly relates to an optical testing method for the mutual radiation impedance of an underwater acoustic array. The optical testing method comprises the steps of obtaining vibration velocity information of a radiation surface of the acoustic array and a mass point of a radiating acoustic field by adopting a laser vibrometer, and then calculating by using the classical acoustic array mutual radiation impedance theory. The invention has the beneficial effects that the shortcomings of a commonly used intrusive acoustic array mutual radiation impedance testing method are overcome by using a non-contact testing method, problems of a method required for underwater acoustic array mutual radiation impedance testing and accurate testing under low frequency and high power are solved, a mutual radiation model is provided for underwater acoustic array velocity control, and a powerful technical guarantee is provided for the development of a low-frequency high-power acoustic array.

Description

technical field [0001] The invention relates to the technical field of underwater acoustic testing, and mainly relates to an optical testing method for mutual radiation impedance of underwater acoustic arrays. 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. Active sonar arrays are gradually developing in the direction of low frequency, large aperture, and high power. In order to achieve high enough transmission power in a limited space, the array elements are usually arranged in a dense array in the design of active sonar arrays. When the distance between the array elements does not meet the minimum requirement of 1 / 4 wavelength, the interaction between the arr...

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Application Information

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IPC IPC(8): G01H15/00G01H9/00
CPCG01H9/00G01H15/00
Inventor 平自红王世全纪京召王少博贾广慧
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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