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Relay elastic metal material accelerated storage degradation failure mechanism change discrimination method

An elastic metal, degradation and failure technology, applied in electrical digital data processing, instrumentation, design optimization/simulation, etc., to achieve the effect of reducing test costs

Active Publication Date: 2018-04-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of how to determine the most appropriate test stress level when formulating the accelerated storage degradation test plan for relays, that is, to ensure that the adopted test stress level can make the failure mechanism of the relay under test conditions consistent with actual conditions. Consistent storage conditions with sufficient acceleration

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  • Relay elastic metal material accelerated storage degradation failure mechanism change discrimination method
  • Relay elastic metal material accelerated storage degradation failure mechanism change discrimination method
  • Relay elastic metal material accelerated storage degradation failure mechanism change discrimination method

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specific Embodiment approach 1

[0018] Specific embodiment one: the following combination figure 1 Illustrating this embodiment, this embodiment discloses a method for judging the change of the failure mechanism of accelerated storage degradation of a relay elastic metal material, which includes the following steps:

[0019] Step 1: At m accelerated stress levels S i , (i=1,2,...,m), perform a storage degradation test on the elastic metal material constituting the relay contact spring system. From the moment t=0, with Δt as the time interval, t=kΔt in the storage test , (k=1,2,...,n) monitor the stress relaxation degree of the elastic metal material at all times; the minimum value of m should be 4, and the acceleration stress is generally temperature stress;

[0020] Step 2: Build a simulation model of the dynamic characteristics of the electromagnetic relay including the relay electromagnetic system and the contact spring system through finite element simulation software;

[0021] Step 3: By modifying the...

specific Embodiment approach 2

[0026] Specific embodiment two: the following combination figure 1 This embodiment is described. This embodiment is a further description of the first specific embodiment.

[0027] In step 1, the lowest stress level among the m accelerated stress levels should be higher than the stress level in the actual storage environment, and the highest stress level among the m accelerated stress levels should be limited according to the test conditions or carried out later. Determine the highest stress level expected to be used for the relay storage degradation test;

[0028] In step 2, the simulation model of the electromagnetic system of the relay is built by Flux software, the simulation model of the contact spring system is built by Adams software, and the dynamic characteristic simulation of the electromagnetic relay is called in real time by Matlab software. The system simulation model and the described contact spring system simulation model are completed;

[0029] In step 3, the...

specific Embodiment approach 3

[0034] Specific implementation three: combination figure 1 Note that this embodiment is a further description of the first and second embodiments, and the application object of this embodiment is a certain type of electromagnetic relay.

[0035]In step 1, five temperature grades are used as the acceleration stress, and the five temperature grades are respectively 60°C, 90°C, 120°C, 150°C, and 180°C, and the Δt is 70 hours;

[0036] figure 2 In order to monitor the material stress relaxation data obtained during the test, it shows that the stress relaxation rate of the elastic metal material under different temperature stress levels is different during the test.

[0037] In step 2, the simulation model of the electromagnetic system of a certain type of electromagnetic relay is built by Flux software, and the simulation model of the contact spring system of a certain type of electromagnetic relay is built by Adams software, as image 3 shown;

[0038] In step 3, by modifying...

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Abstract

The invention provides a relay elastic metal material accelerated storage degradation failure mechanism change discrimination method. The method comprises the steps that a storage degradation test isperformed on a whisker system elastic metal material, and stress relaxation data is tested additionally; a relay dynamic characteristic simulation model is established; storage degradation of the elastic metal material is injected into the simulation model by modifying the model, and storage degradation simulation of a relay is realized; based on acquired simulation storage degradation data and astorage failure threshold, relay storage pseudo-life under different stress levels is estimated; and according to the discrimination criterion of failure mechanism consistency and the relay storage pseudo-life, whether the storage degradation failure mechanism of the relay is changed under different accelerated stress levels is judged. Through the method, the accelerated stress level causing a change in the relay storage failure mechanism can be accurately found out, and a basis can be provided for determining a maximum accelerated stress level capable of being loaded in the accelerated storage test of the relay product.

Description

technical field [0001] The invention relates to a method for judging the failure mechanism of accelerated storage degradation of a relay elastic metal material, and belongs to the technical field of relay product performance analysis and accelerated storage test design. Background technique [0002] The failure mechanism of the product under different accelerated stress levels does not change, which is a prerequisite for carrying out accelerated tests and extrapolating the relevant performance indicators of products under normal stress levels. During the storage process of the relay, the influence of environmental stress such as temperature, humidity, vibration, etc. on it is the main factor that causes its performance to degrade. For electromagnetic relays, the contact spring system is the main component and the key to determining whether the electromagnetic relay can work normally. During the storage process of the electromagnetic relay, the elastic metal material in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 翟国富郑博恺吴岳武旸林义刚叶雪荣
Owner HARBIN INST OF TECH