Acoustic signal extraction method and system of circuit breaker
An extraction method and extraction system technology, which are applied in the field of acoustic signal extraction methods and systems of circuit breakers, can solve the problems of sound signal doping with interference signals, and reduce the accuracy of sound signal extraction, so as to reduce the interference signals and improve the accuracy. Effect
Pending Publication Date: 2022-06-24
GUANGDONG POWER GRID CO LTD +1
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[0003] The invention provides an acoustic signal extraction method and system for a circuit breaker, which solves the technical problem that the extracted acoustic signal is easily doped with interference signals and reduces the accuracy of acoustic signal extraction
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[0038] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0039] For ease of understanding, see figure 1 , a method for extracting an acoustic signal of a circuit breaker provided by the present invention includes the following steps:
[0040] S1. Obtain the sound pulse signal generated when the circuit breaker to be tested is opened and closed;
[0041] S2, denoising the sound pulse signal b...
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The invention relates to the technical field of circuit breakers, and discloses a circuit breaker sound signal extraction method and system, and the method comprises the steps: carrying out the noise filtering of a sound pulse signal generated during the switching on and switching off of a to-be-detected circuit breaker, carrying out the Fourier transform of the denoised sound pulse signal, obtaining a frequency spectrum sequence, carrying out the waveform fitting of the frequency spectrum sequence, and obtaining the sound signal of the to-be-detected circuit breaker. The method comprises the following steps: carrying out frequency spectrum fitting on a sound pulse signal to obtain a frequency spectrum fitting waveform, carrying out phase interception on the frequency spectrum fitting waveform to obtain a frequency spectrum fitting waveform satisfying a preset amplitude interval so as to filter interference of abrupt change noise on the waveform, and carrying out signal reconstruction on the frequency spectrum fitting waveform obtained by interception based on a signal reconstruction algorithm to obtain a reconstructed sound pulse signal. Therefore, interference signals are reduced, and the accuracy of extracting sound signals generated when the circuit breaker is switched on and switched off is improved.
Description
technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a method and system for extracting acoustic signals of circuit breakers. Background technique [0002] The high-voltage circuit breaker is a mechanical structure that plays a key role in the power system, and it undertakes the safety protection task of the entire power system. Therefore, the monitoring of the circuit breaker status is particularly important. Due to the complex operation site environment of high-voltage circuit breakers, there are many random interferences, especially for acoustic signals, which makes it difficult to use integral calculation methods with fixed basis functions, such as short-time Fourier analysis and Wigner-Ville distribution. , wavelet analysis, etc. This is because the above integral operation methods all include integral operation with a fixed basis function, and the analysis has strong randomness, so that the obtained acoustic signal i...
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IPC IPC(8): G01H17/00G01R31/327G06F17/14G06F17/10
CPCG01H17/00G01R31/327G06F17/14G06F17/10
Inventor 梁煜健肖勇邸龙胡峰陈敏杜茵谭建敏蔡昆李丰关畅林建文梁炳钧黎旭刚罗航宇
Owner GUANGDONG POWER GRID CO LTD