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Online rear axle noise quality detecting system

A detection system and quality technology, applied in the direction of measuring device, vehicle test, machine/structural component test, etc., can solve the problems that the sound pressure value cannot accurately reflect the real level of rear axle noise, and the impact of the acoustic environment on the measurement accuracy, etc. , to achieve the effects of compact structure, strong anti-interference ability, prevention of leakage and absorption

Inactive Publication Date: 2007-02-07
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Although the method is simple in equipment, the acoustic environment during the measurement will have a great impact on the measurement accuracy, especially in the case of a large background noise in the manufacturing workshop, the measured sound pressure value cannot accurately reflect the real level of the rear axle noise

Method used

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  • Online rear axle noise quality detecting system
  • Online rear axle noise quality detecting system
  • Online rear axle noise quality detecting system

Examples

Experimental program
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Embodiment Construction

[0023] see figure 1 , figure 2 , in this embodiment, the whole of the test bench is in the shape of a "T", and the front part is a rigid platform 4 that meets the requirements of acoustic reflection. The left and right groups are installed on the rigid platform 4 to adjust the test posture of the rear axle, and are controlled by the lifting motor. 5-driven lifting platform 2, the measured rear axle 3 is supported on the lifting platform 2 on the left and right sides, and the rear axle 3 of the same series does not need to be adjusted after the attitude is adjusted.

[0024] The rear part of the test bench is a power slide 1 driven by a slide motor 7. The main motor 5 that provides driving force for the rear axle 3 under test according to the set speed and steering is set on the power slide 1. The output of the main motor 5 The shaft is connected to the drive shaft of the rear axle 3 under test; the main motor 5 drives the rear axle 3 at speeds of 500r / min, 1100r / min and 2200...

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Abstract

The on-line detection system for rear axle noise quality comprises: a T-shaped test platform with a rigid front plane to prevent leakage and absorption of car noise, a data acquirement and process system, and a control system, wherein there are two elevating platforms on the rigid plane to adjust car attitude for detection on different vehicles; a back drive slide platform can connect with vehicle easily to provide power. As master-slave structure, this invention runs stably, has strong resistance to noise, and can save cost through drive four motors by one frequency converter.

Description

Technical field: [0001] The invention relates to an on-line detection system for automobile rear axle noise quality. Background technique: [0002] The improvement of people's living standards and the increasing concern for the surrounding environment make people have higher requirements for the comfort of the car and the noise inside the car. Our country has promulgated regulations on the control of highway traffic noise, which clearly stipulates the noise level of automobiles when they are running. Automobile manufacturers also recognize the importance of vehicle noise to vehicle quality. The road noise test shows that the rear axle, as an important part of the vehicle transmission system, has a huge impact on the vehicle noise and ride comfort when the vehicle is running. [0003] At present, rear axle manufacturers mainly measure the sound pressure value of the rear axle to reflect its noise level. Although the method is simple in equipment, the acoustic environment d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M13/02G01M17/007
Inventor 李昊陈剑吴振华赵旭东翟清泉邓本波
Owner HEFEI UNIV OF TECH
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