A short-distance cable fault distance measurement system and distance measurement method based on low-voltage pulse method

Abstract

The invention discloses a low-voltage pulse method short-distance cable fault distance measurement system and distance measurement method, including a single-chip microcomputer control module, a keyboard input module, a display screen module, a pulse generation circuit, a pulse delay circuit, a high-speed acquisition module, and a PC processing module , power supply and tested cable, the single-chip microcomputer control module, keyboard input module, display screen module, pulse generation circuit, pulse delay circuit, high-speed acquisition module, PC processing module are respectively connected to the power supply, and the single-chip microcomputer control module is respectively connected to the keyboard input The module, the display screen module, the high-speed acquisition module are connected with the pulse generation circuit, the pulse generation circuit is connected with the pulse delay circuit, the output ends of the pulse delay circuit are respectively connected with the high-speed acquisition module and the cable under test, and the high-speed acquisition module It is connected with the PC processing module; the invention can effectively reduce the measurement blind area, so that the accuracy of cable fault distance measurement is high.

Description

Technical field [0001] The present invention relates to a cable fault ranging system, and more particularly to a short-distance cable fault ranging system and a ranging cable fault ranging system and a ranging cable of low pressure pulse. Background technique [0002] With the rapid development of my country, the power grid has gradually reform, and the power line has gradually realized the cable. As cable applications are more and more wide, the fault problem of the cable will continue. In order to better solve a series of problems from cable failures, it is especially important to accurately grasp the accurate grasp of the fault distance of the cable. Currently, the waveo method is the most effective method for cable fault ranging. By the injection pulse into the paper, the time difference between the incident pulse and the reflection pulse is detected, the traveling distance of the cable can be obtained by binding to the traveling wave speed of the cable. Such as pulse current...

AI Technical Summary

Problems solved by technology

However, when it is a short-distance cable, there will often be a blind zone, which will cause a large deviation in the measured distance

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