A signal processing method and device
A signal processing and signal technology, applied in speech analysis, instruments, etc., can solve the problems of complex noise components, low digital signal noise filtering, poor effect, etc., and achieve good denoising effect and good denoising effect
Active Publication Date: 2019-12-17
北京科信机电技术研究所有限公司
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[0004] The present invention provides a signal processing method and device, which are used to solve the problem in the prior art that the noise filtering effect of the digital signal with complex noise components and low signal-to-noise ratio is not good.
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[0062] In order for those skilled in the art to better understand the technical solution of the present invention, the signal processing method provided by the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
[0063] see figure 1 , is a schematic flowchart of a signal processing method provided by an embodiment of the present invention, such as figure 1 As shown, the signal processing method includes:
[0064] Step S100, performing an autocorrelation operation on the first signal, and performing a time-frequency transformation operation on the result of the autocorrelation operation to obtain a corresponding second signal;
[0065] Step S300, performing a time-frequency transformation operation on the first signal to obtain a corresponding third signal;
[0066] Step S400, acquiring frequency information corresponding to the noise signal according to the second signal;
[0067] Step S500, according to the fr...
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The invention discloses a signal processing method and device. The method includes: executing self-correlation operation on a first signal, executing time frequency conversion operation on a result of self-correlation operation to acquire a corresponding second signal; executing time frequency conversion operation on the first signal to acquire a corresponding third signal; acquiring frequency information corresponding to a noise signal according to the second signal; according to the frequency information corresponding to the noise signal, filtering frequency component corresponding to the noise signal in the third signal, and acquiring a fourth signal after noise is filtered out; executing frequency time conversion operation corresponding to time frequency conversion operation on the fourth signal so as to acquire a fifth signal corresponding to the first signal after the noise signal is filtered out. The signal processing method and device has good denoising effect on digital signals mainly containing periodic ingredients, vibration signals collected at an equal rotating speed especially and has good noise-eliminating effect on other digital signals mainly containing periodic signals.
Description
technical field [0001] The invention relates to the field of digital signal processing, in particular to a signal processing method and device. Background technique [0002] Usually, the signals collected at industrial sites contain complex noise components and the signal-to-noise ratio is low. For example, the vibration signals collected from large-scale equipment in operation contain a large amount of random interference noise. Extract the characteristic information for fault diagnosis. The characteristic information of the vibration signal refers to the parameters such as root mean square, maximum peak value, variance, peak-to-peak value, kurtosis, skewness, waveform index and other parameters of the vibration signal. There is a certain degree of difficulty, so it is necessary to denoise the vibration signal before feature extraction. [0003] For digital signals or slow-changing signals containing multiple frequency components of periodic signals, existing denoising met...
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IPC IPC(8): G10L21/0208G10L21/0224G10L21/0232G10L25/27
Inventor 谷玉海
Owner 北京科信机电技术研究所有限公司