Method and system for electric spark identification of railway catenary based on ultraviolet light detection

Abstract

A railway contact net electric spark identification system based on ultraviolet light detection comprises a light receiving unit, wherein the light receiving unit is connected with a signal processingunit, the signal processing unit is connected with an information storage unit and comprises a filter and amplification module, an A / D sampling module and a microprocessor, and the information storage unit stores acquired voltage and current information. A railway contact net electric spark identification method comprises the steps that 1, high-voltage discharge is detected by detecting ultraviolet light in a solar blind area; 2, a negative pulse signal is reversely amplified to obtain a forward current pulse, a negative current pulse is subjected to filtering processing, and an obtained waveform is adjusted; 3, after background light is filter out, the discharging degree is judged, unit time based integration is conducted on digital quantity, and a received signal is analyzed and received by using a computer; 4, a discharge phenomenon is detected, a spark discharge position point is determined, a contact net spark discharge spectrogram is obtained, the extracted range of corresponding characteristic frequency components is divided into frequency bands, and discharge characteristics are extracted according to the proportion of each frequency band, and the discharge position and intensity of a contact net can be accurately detected.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and in particular relates to a method for identifying electric sparks in a railway catenary based on ultraviolet light detection. Background technique [0002] In recent years, with the rapid development of my country's high-speed railways, traffic safety has increasingly received widespread attention under the background of a substantial increase in railway speed. The vehicle-mounted pantograph is connected with the catenary to form a current loop to provide electric energy for the locomotive. As the source of power for the train to move forward, the dynamic conditions of the catenary and the pantograph have a significant impact on the safe operation of the train. In the railway inspection, the environment along the railway is complex and changeable, and the climate is uncertain. As a perennial overhead equipment, the catenary is very susceptible to its own service life and environ...

AI Technical Summary

Problems solved by technology

The existing non-contact detection methods have disadvantages such as slow calculation speed and low precision.

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