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Temperature-based cable defect detecting system

A defect detection and cable technology, used in material defect testing, detection of faults by conductor type, fault location, etc., can solve the problems of cable insulation deterioration, insulation aging deterioration, overheating, etc., to achieve the effect of ensuring safety

Inactive Publication Date: 2019-04-02
南京龙贞自控科技发展有限公司
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, after the cable is put into operation, due to insulation aging and deterioration, overheating, mechanical damage, etc., the insulation of the cable will deteriorate during operation.

Method used

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Examples

Experimental program
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Embodiment Construction

[0010] The present invention will be further explained below.

[0011] A cable defect detection system based on temperature, including an insulating cable clamp, the insulating cable clamp includes a clamping part for clamping a round cable, the end of the clamping part is connected with an extension part, the extension part is perpendicular to the cable to be detected, and the side of the end of the extension part Cross bar for connecting parallel cables. The end of the bar is equipped with a laser emission and detector fixing structure, the laser emission and detector are connected to an optical fiber, and the end of the optical fiber is connected to a gallium arsenide crystal. The gallium crystal is against the cable to be detected, and the laser emission and detector are connected to the host computer.

[0012] The laser transmitter emits several lasers with different wavelengths, and transmits them to the gallium arsenide crystal through the optical fiber, and the reflec...

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Abstract

The invention discloses a temperature-based cable defect detecting system. A cable is clamped by a clamping portion, a laser emitting and detecting instrument is arranged beyond a safe distance of a cable, and the temperature-based cable defect detecting system is mainly used for ensuring the safety of online detection of the cable. The laser emitting and detecting instrument is connected to a gallium arsenide crystal through an optical fiber, and the gallium arsenide crystal is in contact with a detection position of the cable. When a cable core is defective, the temperature generated by theonline operation is different from the temperature of the surrounding normal position, the temperature-based cable defect detecting system disclosed by the invention senses the operation temperature of the cable through the gallium arsenide crystal that is very sensitive to the temperature, the temperature detection of the gallium arsenide crystal is achieved by using the property that the galliumarsenide crystal absorbs light of different wavelengths due to the temperature variation, and finally whether the cable on a detection point position is defective is judged through an upper computer.

Description

technical field [0001] The invention relates to a temperature-based cable defect detection system. Background technique [0002] With the rapid development of the power system and the progress of the old city renovation project, the application of power cables in the power network is becoming more and more extensive. The basic structure of a power cable includes four parts: core, insulation layer, shielding layer and protective layer. The core is the conductor, which is the part of the power cable that transmits electrical energy and is the main structure of the cable. The insulating layer electrically isolates the wire core from the outside world. The shielding layer includes a conductor shielding layer and an insulating shielding layer, and generally exists in cables of 15kV and above. The protective layer is used to prevent the infiltration of external impurities and moisture and the damage of external force. [0003] According to the voltage level, power cables are c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/72G01R31/08
CPCG01N25/72G01R31/083
Inventor 华正浩朱光茂张晓华张林川
Owner 南京龙贞自控科技发展有限公司
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