Denoising method and device for brake system

A brake system and noise reduction technology, applied in transducer circuits, sensors, signal processing, etc., can solve the problems of reducing the frequency of brake noise, taking a long time, and not being able to completely avoid brake noise, etc. The effect of moving noise

Inactive Publication Date: 2016-08-17
BEIJING CHANGAN AUTOMOBILE ENG TECH RES
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Problems solved by technology

However, the method of structural improvement can only reduce the frequency of braking noise, and cannot completely avoid braking noise, especially low-frequency braking noise below 500 Hz
And the method of structural improvement to solve the brake noise problem requires repeated bench and vehicle verification, which takes a long time

Method used

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  • Denoising method and device for brake system
  • Denoising method and device for brake system
  • Denoising method and device for brake system

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Embodiment Construction

[0042] 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.

[0043] The embodiment of the present invention discloses a noise reduction method for a brake system, see figure 1 , the method includes:

[0044] S101, collecting noise signals;

[0045] Place the sound collection device, such as a microphone, near the noise source to collect all noise signals, such as image 3 As shown, the device is arranged around the brake caliper, which is convenient for the sound collection device to quickly and timely collect noise. ...

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Abstract

The invention provides a denoising method and device for a brake system. The denoising method for the brake system comprises steps as follows: acquiring noise signals; screening the noise signals, and obtaining a low-frequency brake noise signal; analyzing the low-frequency brake noise signal, and generating a denoising signal coherent with the low-frequency brake noise signal according to coherent wave coherent conditions; playing the denoising signal. According to the technical scheme, an active denoising technology is adopted, low-frequency brake noise can be effectively reduced in the principle of sound wave interference, and the noise optimizing period is short.

Description

technical field [0001] The invention relates to the field of noise reduction of an automobile braking system, in particular to a method and device for reducing noise of a braking system. Background technique [0002] Common car noise mainly includes tire noise, road noise, wind noise, engine noise, brake noise, etc. Brake noise is a common noise when a car is braking. Braking noise often occurs in low-speed and low-temperature braking conditions, and the decibel ranges from 70 to 120 decibels, which can easily cause people to be irritable. Automobile brake noise control is a very important part of automobile technology. At present, the main method to solve the brake noise is to change the structure of the friction pair to reduce the frequency of noise occurrence. However, the method of structural improvement can only reduce the frequency of braking noise, but cannot completely avoid braking noise, especially low-frequency braking noise below 500 Hz. Moreover, the method o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 陈小莉吕凌志马涛李海霞张同梅心宇陆地
Owner BEIJING CHANGAN AUTOMOBILE ENG TECH RES
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