Bearing fault and fault degree diagnostic method on basis of phase-locked amplification algorithm

A technology of lock-in amplification and fault degree, applied in the direction of mechanical bearing testing, etc., can solve the problem of single type of reference signal and so on

Active Publication Date: 2013-05-01
BEIJING UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] However, most of the current phase-locking technologies are applied to the amplificati

Method used

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  • Bearing fault and fault degree diagnostic method on basis of phase-locked amplification algorithm
  • Bearing fault and fault degree diagnostic method on basis of phase-locked amplification algorithm
  • Bearing fault and fault degree diagnostic method on basis of phase-locked amplification algorithm

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Embodiment Construction

[0072] figure 1 It is a diagram of the main components of the bearing fault diagnosis based on the lock-in amplification algorithm of the present invention. Bearing fault diagnosis based on lock-in amplification algorithm consists of two parts: bearing fault diagnosis and bearing fault degree diagnosis

[0073] figure 2 It is a flow chart of bearing fault diagnosis based on lock-in amplification algorithm of the present invention. The bearing fault diagnosis method based on the lock-in amplification algorithm will be described in detail below in conjunction with the flow chart.

[0074] (1) Use the acceleration vibration sensor to measure the vibration signal during the operation of the bearing, and obtain the vibration acceleration signal as the signal s(t) to be analyzed. The sampling length is set to the integer power of 2, and the sampling frequency is set according to the bearing speed and model ;

[0075] (2) Establish a reference signal

[0076] y ...

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Abstract

The invention discloses a bearing fault and fault degree diagnostic method on the basis of a phase-locked amplification algorithm. According to the invention, due to the advantages of stable center frequency, narrow transmission band, high quality factor and the like of a phase-locked amplifier, a phase-locked amplification principle is applied to diagnosis on a bearing fault and a fault degree by utilizing the phase-locked amplifier. A reference signal on the basis of the bearing fault signal characteristics is established and the phase-locked amplification principle is utilized to remain and amplify information related to the fault and reduce noise signals which are not related to fault ingredients by multiplication and integral operation, so that rapid separation of signal noise and positioning on the fault are implemented. Meanwhile, a reference signal added with fault degree parameters is established and diagnosis on the bearing fault degree is implemented by combining a kurtosis value.

Description

technical field [0001] The invention relates to a bearing fault and fault degree diagnosis method, in particular to a bearing fault and fault degree diagnosis method based on a phase-locked amplification algorithm. Background technique [0002] The working performance of the industrial transmission system directly affects the working efficiency of the entire production line. As an important part of industrial transmission system, bearings play a key role. The most important parts inside the bearing include rolling bearings and gears. Because these two parts often operate under high-speed and heavy-load conditions, the failure rate is high. Once a failure occurs, it will cause serious casualties and economic losses. Therefore, condition monitoring and fault diagnosis of bearings are of great significance to ensure production safety, prevent major accidents and reduce production costs. [0003] At present, the vibration signal processing technology based on high-speed comput...

Claims

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Application Information

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IPC IPC(8): G01M13/04
Inventor 崔玲丽王婧莫代一邬娜吴春光
Owner BEIJING UNIV OF TECH
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