Internal combustion engine exhaust silencer shell noise radiation testing system

A technology of noise radiation and test system, applied in the direction of internal combustion engine testing, machine/structural component testing, mechanical component testing, etc. To achieve the effect of convenient operation, low cost and easy to obtain

Pending Publication Date: 2018-09-14
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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Problems solved by technology

This method requires the research and development of special simulation test software, which is expensive, and when multiple f

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  • Internal combustion engine exhaust silencer shell noise radiation testing system

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Embodiment Construction

[0016] The present invention will be described in detail below in conjunction with the accompanying drawings. However, the present invention is not limited to the following examples.

[0017] As shown in the figure, a noise radiation test system for an internal combustion engine muffler shell includes a muffler to be tested 1, a control mechanism, a speaker 2 and a plurality of microphones 3 electrically connected to the control mechanism, and the control mechanism includes electric Connected data processing module 4 and data acquisition module 5, wherein, data acquisition module 5 is electrically connected with loudspeaker 2, and described loudspeaker 2 is arranged in a sound-absorbing box 6, and the sound outlet place of loudspeaker 2 is sealed and connected with The sound channel pipe 7, the end of the sound channel pipe 7 is connected to the inlet end of the muffler 1 to be tested through a pipe coupling 8, and the outlet end of the muffler 1 to be tested is connected to t...

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Abstract

The invention discloses an internal combustion engine exhaust silencer shell noise radiation testing system. The testing system comprises a sound absorption box, a loudspeaker, a sound track pipe, a data acquisition unit, an interface box, a microphone, a front-end pipe coupling, a to-be-tested silencer, a microphone, a tail-end pipe coupling, a silencing tail pipe, a sound absorption partition plate, a data processor and a software system. The data processor and the software system transmit a noise signal to the data acquisition unit and the interface box, the noise signal is amplified by thedata acquisition unit, the interface box and the loudspeaker, the generated noise enters the sound track pipe and then enters a to-be-tested silencer sample piece, one part of the microphone can be used for testing silencer shell noise radiation, and the other part of the microphone can be used for testing radiation noise at the tail of the silencer. The system is used for testing and researchingradiation noise of the internal combustion engine exhaust silencer shell and tail pipe structures.

Description

technical field [0001] The invention belongs to the technical field of noise testing, in particular to a noise radiation testing system for an internal combustion engine muffler shell. Background technique [0002] The intensity of noise has an important impact on our physical and mental health. With the improvement of industrialization, the scope of noise hazards is expanding. The use of mufflers is the most effective noise reduction method commonly used to control the exhaust noise of automobile engines, fans, air compressors and other equipment. The radiated noise of the muffler shell is directly related to the design of the muffler structure and the selection and use of different materials. Testing is a very important method for the research of the radiated noise of the muffler. [0003] In the prior art, the research on radiated noise of mufflers is mostly done through software simulation analysis and vehicle loading test. This method requires the research and develop...

Claims

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Application Information

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IPC IPC(8): G01M15/04G01M13/00
CPCG01M13/00G01M15/04
Inventor 赵海军李洪亮梁凯张玉书翟乃斌王海霞宋伟志周辉
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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