System for detecting non-stationary acoustic source based on near-field acoustical holography technology

A non-stationary sound source and near-field sound holography technology, which is applied in the field of systems for detecting non-stationary sound sources, can solve problems that have not yet been found, and achieve the effect of convenient noise control

Inactive Publication Date: 2014-04-30
GUANGXI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

A system that uses near-field acoustic holography to detect non-stationary sound sources, no similar reports have been found

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Embodiment Construction

[0010] Preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0011] The present invention is a system for detecting non-stationary sound sources based on near-field acoustic holography technology. The monitor runs the sound source identification algorithm analysis and processing software in the host computer.

[0012] The acoustic emission sensor array collects acoustic emission signals, and after being amplified by the broadband acoustic emission preamplifier and filtered, it enters the AD converter for multi-channel signal conversion. The AD converter converts the data and transmits it to the DSP processor. The processed data Upload the host computer, and the host computer uses LABVIEW as the software platform to perform data analysis and processing, complete the reconstru...

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Abstract

The invention discloses a system for detecting a non-stationary acoustic source based on a near-field acoustical holography technology. The system is characterized by sequentially comprising an acoustic emission sensor array, a broadband acoustic emission pre-amplifier, an AD converter, a DSP, an upper computer and a graphic displayer. Acoustic source recognition algorithm analysis and processing software is operated in the upper computer. The non-stationary acoustic source is positioned through the near-field acoustical holography technology, the position and the characteristics of the non-stationary acoustic source can be accurately measured, and therefore convenience is provided for effective control over noise.

Description

technical field [0001] The invention relates to a system for detecting non-stationary sound sources based on near-field acoustic holography technology. Background technique [0002] From the perspective of environmental protection, all sounds that affect people's normal study, work and rest, and all "unwanted sounds" that people have on certain occasions are collectively referred to as noise. Such as the roar of machines, the sound of motors and whistles of various vehicles, the noise of people and various sudden sounds, etc., are all called noise. In order to effectively control noise, the location and characteristics of the sound source must be accurately judged before noise reduction measures are implemented. A system using near-field acoustic holography to detect non-stationary sound sources has not yet been found. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/18
CPCG01S5/18
Inventor 向宇何伟
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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