Multi-frequency weak signal detecting method for early failure of rotor

A weak signal detection and early failure technology, applied in the electronic field, can solve the problems of limited detection signal-to-noise ratio, single detection signal frequency, and inability to meet the simultaneous detection of multiple characteristic signals, etc., to achieve easy engineering implementation, improve signal-to-noise ratio, The effect of simple method
CN101294845AInactive Publication Date: 2008-10-29NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NORTHWESTERN POLYTECHNICAL UNIV
Publication Date
2008-10-29
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a multi-frequency weak signal detection method for detecting the failure of a rotor in the early stage. A related method is adopted to conduct prophase noise removal, and a chaotic oscillator array scanning method is adopted to realize simultaneous detection of a plurality of frequency weak signals represented by the same failure, that is, signals with noise are denoised through related calculation, a related function is sent to the chaotic oscillator array and serves as a part of chaotic system periodic driving force, and the weak periodic signal of a signal to be detected can be detected through the change of chaotic system phase locus. The method improves the signal-to-noise ratio of the signal to be detected, and completes the detection of multi-feature weak signal through identifying the state of Duffing oscillator, namely the change of phase locus pattern. Therefore, the method has the advantages of simplicity, intuition, definite physical significance and high detection signal-to-noise ratio. Furthermore, the method is capable of completing the weak signal detection of a plurality of known frequencies and easy for engineering realization, thereby having greater development potential.
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Description

technical field

[0001] The invention belongs to the field of electronic technology and relates to a method for detecting weak signals. Background technique

[0002] Weak signal detection is a science that studies the methods and techniques of extracting information from noise. It is a comprehensive technology and cutting-edge field in measurement technology to study the principle and method of weak signal detection in noise. Using this technology can measure the weak quantities that traditional concepts cannot be measured (such as weak light, small displacement, micro-vibration, etc.), so that the measurement accuracy of weak signals is greatly improved. Therefore, it is an important measurement method for developing high-tech, exploring and discovering new natural laws, and is of great value in promoting the development of science and technology and production.

[0003] Weak signal detection technology has applications in various fields related to human beings. For examp...

Claims

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