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High-frequency pantograph-catenary dynamic response signal filtering method and device

A dynamic response, high-pass filtering technology, applied in signal pattern recognition, instrument, character and pattern recognition, etc., can solve the problem of incomplete and accurate filtering of interfering signals, etc.

Pending Publication Date: 2021-01-05
CHINA RAILWAYS CORPORATION +3
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Problems solved by technology

Therefore, the existing filtering methods for high-frequency pantograph-catenary dynamic response signals cannot completely and accurately filter out interference signals without damaging normal signals

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  • High-frequency pantograph-catenary dynamic response signal filtering method and device
  • High-frequency pantograph-catenary dynamic response signal filtering method and device
  • High-frequency pantograph-catenary dynamic response signal filtering method and device

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[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] An embodiment of the present invention provides a filtering method for high-frequency pantograph-catenary dynamic response signals, which is used to completely and accurately filter out interference signals in high-frequency pantograph-catenary dynamic response signals without damaging normal signals, such as figure 1 As shown, the method includes:

[0043] Step 101: receiving a high-frequency pantograph-catenary dynamic response signal; ...

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Abstract

The invention provides a high-frequency pantograph-catenary dynamic response signal filtering method and device, and the method comprises the steps: carrying out the Fourier transform and inverse Fourier transform, and obtaining a high-frequency pantograph-catenary dynamic response signal after high-pass filtering; filtering an interference signal corresponding to the single-point high-frequency abnormal value by using a classification regression decision tree CART according to the signal change characteristics after high-pass filtering to obtain a first signal; according to the relative peakvalue, filtering an interference signal corresponding to the section abnormal value by using a fuzzy filter to obtain a second signal; and according to the low-frequency trend information, filtering out the interference signal corresponding to the fragment abnormal value by using a wavelet packet to obtain a signal after the complete interference signal is removed. Different interference signals are filtered by different methods, so that normal signals are not damaged, and interference signals in high-frequency pantograph-catenary dynamic response signals are completely and accurately filtered.

Description

technical field [0001] The invention relates to the technical field of electrified railway power supply, in particular to a filtering method and device for a high-frequency pantograph-catenary dynamic response signal. Background technique [0002] Electrified railways have very strict requirements on catenary equipment. The catenary is erected in the open air, has no backup and needs to withstand the impact from the pantograph, which has become one of the weak links of the electrified railway system. Among them, the hard point of catenary is a very important factor affecting the quality of catenary equipment. In order to find the catenary hard point in time, the high-frequency pantograph-catenary dynamic response is used to diagnose the hard point of the catenary. Strong overvoltage, overcurrent and other transient processes form electromagnetic interference, resulting in a large number of interference signals in the detection data of high-frequency pantograph-catenary dyna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62
CPCG06F2218/02G06F2218/04G06F2218/12G06F18/24323G06F18/214
Inventor 刘金朝徐晓迪丁宇鸣张文轩杨志鹏郭剑锋
Owner CHINA RAILWAYS CORPORATION
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