Cable fault test system and determining method of fault point

Abstract

The invention discloses a cable fault test system and a determining method of a fault point, mainly solving the problems that a field operator requires to walk to and fro at the fault point in the traditional fault positioning and can judge the position of the fault point by listening to the intensity of discharge sound. The determining method comprises the following implementation steps of: quadrangularly distributing four sonic sensors on the ground near the position after measuring the general position of the fault point by using a cable fault intelligent tester for receiving sound wave data of the fault point discharge; distributing an electromagnetic receiver at the test position for receiving electromagnetic wave data of the fault point; and differentiating the data of the four sonic sensors and the electromagnetic wave data to obtain a time value and coordinate values of the four sonic sensors on a horizontal plane and accurately calculating the position of the fault point by using a fault point calculation formula. The invention has the advantage that the position of the fault point can still be accurately judged under the condition that a worker cannot reach the area in which the fault point is positioned and can be used for positioning the faults generated by various cables.

Description

technical field [0001] The invention belongs to the technical field of testing, and relates to cable fault measurement, in particular to a point-fixing method for cable fault locations. Background technique [0002] For a long time, in order to find a convenient and effective method of distance measurement and location of wire and cable faults, the majority of scientific and technological workers have made unremitting efforts and proposed many methods. For example, Xidian University produced the first DGC-711 buried cable fault tester in China in January 1971, and then launched the DGC-711 series intelligent cable fault tester with relatively complete functions, stable performance and compact structure. In the 1990s, the DGC-911 series cable fault intelligent tester was launched. In 2010, the DGC-2010 multi-pulse cable fault intelligent tester was launched. In principle, cable fault location needs to be completed in three steps: rough measurement, path finding, and fixed p...

AI Technical Summary

Problems solved by technology

The main disadvantages of this method include three aspects: one is that due to the influence of electromagnetic noise and vibration noise in the environment, it is difficult for the operator of the fixed-point instrument to determine the "soundest point" of the fault point; On-site operators cannot reach the area where the fault occurs, so they cannot accurately determine the location of the fault point; third, the existing fixed-point measurement methods require on-site operators to use their ears to determine the location of the fault point by listening to the strength of the discharge sound at the fault point

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