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Noise source determination method and device

A method for determining a noise source, which is applied in measurement devices, character and pattern recognition, and pattern recognition in signals, etc., to achieve the effect of improving accuracy and solving missed or misjudged target noise sources.

Pending Publication Date: 2021-04-13
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a method and device for determining a noise source, which can solve the problem of missing or misjudging a target noise source to a certain extent, thereby improving the accuracy of determining a noise source

Method used

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  • Noise source determination method and device
  • Noise source determination method and device

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Embodiment 1

[0061] figure 2 It is a schematic flowchart of a method for determining a noise source provided in an embodiment of the present application. The method for determining a noise source may be executed by software and / or hardware devices, for example, the hardware device may be a terminal or a server. For example, see figure 2 As shown, the determination method of the noise source may include:

[0062] S201. Acquire a plurality of vibration signals and a plurality of noise signals that have noise effects on a detection area in a vehicle.

[0063] For example, when acquiring multiple vibration signals that have noise effects on the detection area in the vehicle, an acceleration sensor may be disposed in the detection area, and the multiple vibration signals that have noise effects on the detection area may be collected by the acceleration sensor. When acquiring multiple noise signals that have noise effects on the detection area in the vehicle, a microphone may be provided in ...

Embodiment 2

[0091] image 3 It is a schematic flowchart of determining the target frequency band to which the noise affecting the detection area belongs according to the embodiment of the present application. The method for determining the target frequency band to which the noise affecting the detection area belongs can also be executed by software and / or hardware devices. For example, see image 3 As shown, the method for determining the target frequency band to which the noise affecting the detection area belongs may include:

[0092] S301. Perform Fourier transform on multiple vibration signals and multiple noise signals to obtain an input auto-spectrum, an output auto-spectrum, and an input-output cross-spectrum corresponding to the multiple vibration signals and the multiple noise signals.

[0093] Among them, the input auto-spectrum is the input auto-power spectrum, the output auto-spectrum is the output auto-power spectrum, and the cross-spectrum of input and output is the cross-p...

Embodiment 3

[0109] As an example, in a possible implementation manner, it may be verified whether the determination result is correct by removing corresponding components. For example, if the target noise source is determined to be one of the wheels of the vehicle through the methods described in the above embodiments, the wheel may be disassembled. Noise detection is performed on the vehicle after the wheel is removed by the method described in the above embodiment, and if there is no corresponding transmission path in the original target frequency band, the wheel is determined to be the target noise source.

[0110] In another possible implementation manner, it may be verified whether the determination result is accurate by replacing corresponding components. For example, if the target noise source is determined to be two transmission shafts of the vehicle through the method described in the above embodiment, the transmission shaft of the target noise source may be replaced with two tra...

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Abstract

The embodiment of the invention provides a noise source determination method and device, and the method comprises the steps: obtaining a plurality of vibration signals and a plurality of noise signals which generate noise impact on a detection region in a vehicle when a main noise source affecting the detection region is determined; determining a target frequency band to which noise influencing the detection area belongs according to the plurality of vibration signals and the plurality of noise signals; acquiring a full-band excitation response value corresponding to each transmission path in a plurality of transmission paths corresponding to a plurality of noise sources in the vehicle; and according to the target frequency band and the full-frequency-band excitation response values corresponding to the transmission paths, determining the target noise source influencing the detection area together, so that the problem of missed judgment or erroneous judgment of the target noise source can be solved to a certain extent, and the accuracy of determining the noise source is improved.

Description

technical field [0001] The invention relates to the technical field of vehicle noise, in particular to a method and device for determining a noise source. Background technique [0002] With the advancement of science and technology and the improvement of people's living standards, vehicles have become an indispensable means of transportation for people's daily life. In recent years, people have higher and higher requirements for vehicles. While meeting the needs of transportation, they also put forward high requirements for the performance of noise, vibration, and harshness (NVH) of vehicles. Therefore, the vehicle manufacturing industry needs to further optimize the NVH performance of the vehicle. [0003] In the prior art, the noise data and the data of the response points receiving the noise are analyzed by acquiring the noise data of each excitation point in the vehicle cab, and using the Operation Path Analysis with Exogeneous Inputs (OPAX) method After processing, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/68G01H17/00
CPCG01H17/00G06V10/75G06F2218/02G06F2218/12
Inventor 张钦超毛洪海杨延功聂文武杨东升
Owner WEICHAI POWER CO LTD
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