Railway vehicle interior noise source identification method and system

A technology for rail vehicle and vehicle interior noise, applied in the field of noise source identification, can solve problems such as low efficiency and incompatibility, and achieve the effect of improving processing efficiency

Active Publication Date: 2021-01-05
CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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Problems solved by technology

[0007] It can be seen that the existing surface noise recognition technologies are either suitable for different occasions based on their respective characteristics and are not universal, or although they are universal, their efficiency is relatively low in the case of a large amount of data

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  • Railway vehicle interior noise source identification method and system
  • Railway vehicle interior noise source identification method and system
  • Railway vehicle interior noise source identification method and system

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Embodiment Construction

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0051] In this application, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes none. other elements specifically listed, or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "com...

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Abstract

The invention discloses a railway vehicle interior noise source identification method and system. The method comprises the steps of collecting the sound pressure data of different positions in a railway vehicle in real time through a spherical microphone in a running state of the railway vehicle, performing ball Fourier transform processing on the sound pressure data to obtain a corresponding sound source frequency, counting the sound source frequency once every other preset interval to obtain N groups of sound source frequencies, taking M*N groups of sound source frequencies obtained by M times of counting as input of a neural network model, and outputting M*N groups of sound source position information, arranging each group of sound source position information according to the sound source frequency corresponding to the sound source position information to obtain M*N groups of new sound source position information, and selecting a sound source indicated by the first sound source position information of which the corresponding sound source frequency exceeds the preset sound source frequency from each group of new sound source position information as the position of the noise source in the counting interval. Therefore, the purpose of efficiently completing noise identification under the condition of ensuring that noise identification is suitable for various occasions is achieved.

Description

technical field [0001] The invention relates to the technical field of noise source identification, in particular to a method and system for identifying noise sources in rail vehicles. Background technique [0002] At present, there are many ways to identify surface noise, including sound intensity method, near-field acoustic holography technology, planar phased array technology and spherical phased array technology. Different surface noise identification techniques are suitable for different occasions. [0003] The sound intensity method is to use the sound intensity probe to measure the grid points on the measurement surface one by one, and then accurately locate the noise source. This not only makes the measurement of the sound intensity method complicated, but also takes a long time to measure, and the sound source to be measured must be steady and non-moving, which also makes the sound intensity method have great limitations. [0004] Near-field acoustic holography te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01H17/00G01S5/20G06N3/04G06N3/08
CPCG01H17/00G01S5/20G06N3/04G06N3/08Y02T90/00
Inventor 赵靖洲汤晏宁孙勇李新一
Owner CRRC CHANGCHUN RAILWAY VEHICLES CO LTD
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