Mechanical fault judgment method based on noise test

A technology for mechanical failure and noise testing, applied in vibration testing, testing of mechanical components, testing of machine/structural components, etc., can solve complex, difficult, and noise-polluted problems
CN102095560BInactive Publication Date: 2013-04-17CHONGQING TELECOMMUNICATION INSTITUTE
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHONGQING TELECOMMUNICATION INSTITUTE
Publication Date
2013-04-17
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention belongs to the fields of the state monitoring and the fault diagnosis of vehicles, ships, engineering machinery, locomotive cars, engines, and the like by applying noise signals, in particular to a mechanical fault judgment system and method based on noise test, particularly suitable for complicated mechanical machinery which can not be provided with various sensors. The system comprises a high-frequency microphone, a sound card, a PC (Personal Computer) and a telescopic bracket, wherein the high-frequency microphone is fixed on the telescopic bracket and connected with the sound card, the sampling frequency of the high-frequency microphone can meet the requirement of the Nyquist theorem, and the sound card is connected with the PC. On the basis of combing the extraction andfractal algorithm of an energy band, noise signals in machinery operation are acquired and calculated to test mechanical faults by using the method; the system is simple to set, the economic cost is decreased, and the operation safety and the fault diagnosis accuracy are improved.
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Description

technical field

[0001] The invention belongs to the field of state monitoring and fault diagnosis using noise signals, such as automobiles, ships, engineering machinery, locomotives, generators, etc., and is especially suitable for complex mechanical equipment that cannot be equipped with various sensors. Background technique

[0002] The research on mechanical condition monitoring and fault diagnosis technology for running machinery has a long history. The application of vibration signals as the main test and analysis method on internal combustion engines began 20 years ago, and a series of important internal combustion engine test researches based on vibration signals have been completed, while internal combustion engine test analysis based on acoustic signals has not attracted enough attention. attention. This is mainly because people think that the machine sound signal transmitted through the air contains noise signal and is extremely complex, and it is difficult to avo...

Claims

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