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A Screening Method for Environmental Stress of Cable Network

A technology of environmental stress screening and cable network, which is applied in the direction of measuring device, vibration test, machine/structural component test, etc., can solve the problems of large differences in screening methods and the inability to guarantee the rationality of screening parameters, so as to improve reliability and improve The effect of screening degree and efficiency

Active Publication Date: 2013-01-16
CASIC DEFENSE TECH RES & TEST CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cable network environmental stress screening method to solve the problems that the different cable network screening methods in the past have large differences and the rationality of the screening parameters cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0021] A kind of concrete steps of the method for environmental stress screening of cable network are:

[0022] The first step is to determine the type of stress

[0023] There are six main sensitive stresses to stimulate the failure mode of cable network, namely: random vibration, temperature cycle, temperature shock, low air pressure, high temperature and damp heat. The sensitive stress that determines the failure mode of the cable network mainly includes temperature cycles and random vibrations. The cable network that requires gas leakage after the connector is fixed requires an airtight test. During the temperature cycle, the cable net is placed in the test box to test the insulation resistance of the cable net; when the random vibration is performed, the cable net is fixed on the vibration table, and under the excitation of the applied random vibration, the cable net is monitored for transients Instantaneous failure; when performing an airtight test, fix one end of the c...

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Abstract

The invention discloses a cable network environmental stress screening method, which solves the problems of large differences in previous cable network screening methods and the rationality of screening parameters. The steps of the method are: firstly, determine the stress type for environmental stress screening; Theoretical and design schemes are tested, and the stress parameters are initially determined through data analysis; and then the rationality of the stress parameters is verified through verification tests. This method conducts special research on the performance structure characteristics and main failure modes of connectors, potting bodies and cable nets in the cable net, and determines that the stress that can effectively stimulate the cable net faults is temperature cycle and random vibration. The airtightness test is carried out on the cable network with airtightness requirements, which achieves the unification of the screening methods and ensures the reasonableness of the parameters.

Description

technical field [0001] The invention relates to an environmental stress screening method, in particular to a cable network environmental stress screening method. Background technique [0002] In the past, the environmental stress screening method for the cable network mainly refers to the relevant clauses in GJB1032-90 "Electronic Product Environmental Stress Screening Method". This standard specifies the requirements, conditions and methods for environmental stress screening of military electronic products, and is applicable to the environmental stress of ground fixed equipment, ground mobile equipment, ship equipment, aircraft equipment, and external and missile equipment in the development and batch production stages. filter. Environmental stress screening is divided into two stages: defect elimination and no-fault inspection. The defect elimination stage requires random vibration for 5 minutes, and then 40 hours of temperature cycle; Random vibration for 5 to 15 minute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M7/02
Inventor 郑宏玲
Owner CASIC DEFENSE TECH RES & TEST CENT
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