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Sound intensity sparse measurement high-resolution imaging method based on simulated sound field prior information

A high-resolution, imaging method technology, applied in measurement devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problem of unable to meet the sound source identification accuracy of vibration source-intensive components, and expand the sound intensity measurement bandwidth. , the effect of reducing requirements and reducing workload

Active Publication Date: 2021-04-23
FUZHOU UNIVERSITY
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Problems solved by technology

[0005] In view of this, the present invention combines compressed sensing theory with sound intensity imaging technology to provide a high-resolution imaging method for sound intensity sparse measurement based on the prior information of the simulated sound field, which solves the problem that the original sound intensity imaging technology cannot meet the needs of vibration source-intensive components. Accuracy of sound source identification

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  • Sound intensity sparse measurement high-resolution imaging method based on simulated sound field prior information
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  • Sound intensity sparse measurement high-resolution imaging method based on simulated sound field prior information

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[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0031] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The invention relates to a sound intensity sparse measurement high-resolution imaging method based on simulated sound field prior information. The method comprises the steps: firstly carrying out the structural noise radiation analysis of a target sound source element, and obtaining a visual image of the simulated sound intensity distribution; extracting prior information of the simulated sound field, comprising the positions of sound intensity measuring points, a sparse matrix and the sparsity K; combining the positions of the sound intensity measuring points and a Gaussian mixture distribution model to complete the position design of the sound intensity measuring points, and deriving a mathematical model of an observation matrix according to the designed positions of the measuring points; and finally, based on a compressed sensing data processing framework formed by the sparse matrix, the observation matrix and a greedy algorithm, performing algorithm reconstruction on the sound intensity sparse measurement value to realize high-resolution imaging.

Description

technical field [0001] The invention relates to the technical field of sound intensity measurement and imaging, in particular to a high-resolution imaging method for sound intensity sparse measurement based on prior information of simulated sound field. Background technique [0002] The sound intensity measurement imaging technology visually displays the sound intensity field energy distribution outside the vibrating body in the form of images. It is mainly used in the noise source location of system-level products such as vehicle power systems and refrigerator refrigeration systems. In particular, image textures containing detailed information of sound sources Features can also be used for system fault diagnosis. This method is convenient and highly recognizable, but it still has the problem of insufficient resolution when imaging small-sized components. [0003] The limited resolution of sound intensity imaging stems from two problems: the inherent systematic error of soun...

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Application Information

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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 黄惠李智超吴干永陈淑梅贡青鸿
Owner FUZHOU UNIVERSITY
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