Insulation fault diagnosis method for cable system

A technology for insulation faults and diagnosis methods, applied in the direction of testing dielectric strength, etc., can solve the problems of hidden dangers in the shooting range test, easy fatigue of personnel, and lack of testing, and achieve the effect of large application and promotion value.

Active Publication Date: 2016-11-23
BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH +1
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AI Technical Summary

Problems solved by technology

[0002] Weapons, launch vehicles and other models use large-scale cable nets, and the cable nets must be tested for insulation, withstand voltage, and conduction resistance before leaving the factory. The traditional test method is to use a shaker to test the insulation, relying on testers to manually diagnose cable network insulation faults. During the test, the personnel are prone to fatigue, resulting in repeated tests, missed tests, and failed tests. The current effective solution The method is to use the cable network tester to complete the insulation test of the cable network. This instrument automatically diagnoses the insulat

Method used

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Examples

Experimental program
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Embodiment Construction

[0011] A cable network insulation fault diagnosis method, comprising the steps of:

[0012] Step 1: Assume that the temperature stability of the equipment is T I ;The insulation judgment limit is 100MΩ, select the first pair of core points for the first insulation test, and the resistance value obtained by the test is R S ;

[0013] Step 2: If R S1 When S2 >100kΩ, then terminate step 2 and start from step 1 again; if the test resistance R S2 S10 S Both are less than 100kΩ, the first pair of core point insulation failure conclusions are given, and the test is over;

[0014] Step 3: If 100kΩ≤R S When ≤100MΩ; the system does not switch the core point, and the resistance value obtained by the test is R' S , conduct 30 consecutive insulation tests on the first pair of core points, and test data (1,R′ S1 ),…, (30,R′ S30 ) using the least squares method for linear fitting to obtain the intercept a and slope b of the line; if the slope b≤equipment temperature stability T I , g...

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Abstract

The invention belongs to a field of insulation fault diagnosis methods and specifically relates to an insulation fault diagnosis method for a cable system. The invention solves problems of long insulation fault detection time and high fault rate existing in cable system testing for a long term and provides the effective and practical method for insulation fault diagnosis of large scale cable systems. Production quality of the cable system is verified fully and the method provided by the invention has great application and promotion value. The method includes obtaining a resistance value RS through testing; testing a first pair of core points and obtaining a result about whether insulation of the first pair of core points is qualified or not; switching to the next pair of core points until insulation fault diagnosis of all the core points of the cable system is implemented and finishing the testing.

Description

technical field [0001] The technology belongs to the field of insulation fault diagnosis methods, and in particular relates to a cable network insulation fault diagnosis method. Background technique [0002] Weapons, launch vehicles and other models use large-scale cable nets, and the cable nets must be tested for insulation, withstand voltage, and conduction resistance before leaving the factory. The traditional test method is to use a shaker to test the insulation, relying on testers to manually diagnose cable network insulation faults. During the test, the personnel are prone to fatigue, resulting in repeated tests, missed tests, and failed tests. The current effective solution The method is to use the cable network tester to complete the insulation test of the cable network. This instrument automatically diagnoses the insulation faults of the cable core points in turn without manual intervention, which reduces labor costs, but it is time-consuming for multi-channel conti...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 孙德冲张莉莉蔡惠华田婧魏志强葛萌贾丰锴张正龙
Owner BEIJING AEROSPACE INST FOR METROLOGY & MEASUREMENT TECH
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