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A High-Resolution Imaging Method for Sparse Measurement of Sound Intensity Based on Prior Information of Simulated Sound Field

A high-resolution, imaging method technology, applied in measuring 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 resolution improvement and workload reduction

Active Publication Date: 2022-05-31
FUZHOU UNIV
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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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  • A High-Resolution Imaging Method for Sparse Measurement of Sound Intensity Based on Prior Information of Simulated Sound Field
  • A High-Resolution Imaging Method for Sparse Measurement of Sound Intensity Based on Prior Information of Simulated Sound Field
  • A High-Resolution Imaging Method for Sparse Measurement of Sound Intensity Based on Prior Information of Simulated Sound Field

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

[0030] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, 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 herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components, and...

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Abstract

The present invention relates to a high-resolution imaging method for sparse measurement of sound intensity based on prior information of simulated sound field. Firstly, the target sound source element is subjected to structural noise radiation analysis to obtain a visualized image of its simulated sound intensity distribution; and then the simulated sound field is extracted. The prior information includes: the position of the sound intensity point, the sparse matrix, and the degree of sparsity K; combined with the position of the sound intensity point and the mixed Gaussian distribution model, the position design of the sound intensity measuring point is completed, and the position of the measured point is derived according to the designed position Finally, based on the compressed sensing data processing framework composed of sparse matrix, observation matrix and greedy algorithm, the sparse measurement value of sound intensity is reconstructed algorithmically to achieve 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 a priori information of an analog 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 localization 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 ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 黄惠李智超吴干永陈淑梅贡青鸿
Owner FUZHOU UNIV
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