Data required for reliability test application of the third party certification institution of electronic products

Date：2023-02-24 17:33:26Views：458

Reliability test refers to testing and verifying the reliability of products. The research finds out the weak links of the product under the limited sample, time and use cost. Reliability test is the general name of various tests conducted to understand, evaluate, analyze and improve the reliability of products. Use various environmental testing equipment to simulate various changes in the climate environment, speed up the response to the commodity use environment, verify whether the research and development, design, evaluate the entire product, and confirm the reliability life of the product.

Purpose of reliability test:

In order to measure, verify or improve product reliability, the experiment is called reliability test, which is an important part of product reliability work.

Generally speaking, the purpose of product reliability test is as follows:

1. At the development stage, make the product reach the predetermined reliability index. In order to make the product reach the predetermined reliability index, the development stage needs to conduct reliability test on the sample to find the product in the raw material. Construction. workmanship Through repeated tests and improvements, various reliability indicators of the product can be continuously improved to meet the predetermined requirements;

2. Conduct reliability appraisal when the commodity development is finalized. When new products are developed and finalized, identification tests shall be carried out according to product standards (or product technical conditions) to comprehensively evaluate whether the products meet the specified reliability indicators;

3. Control product quality during production. In order to stabilize the production of products, it is sometimes necessary to test the reliability of each commodity according to the technical conditions of the commodity. In addition, reliability sampling test shall be carried out batch by batch or batch by batch within a certain time. Through product reliability test, we can understand the stability level of product quality. If the product quality is reduced due to poor quality of raw materials or out-of-control process, it can be reflected in the reliability test of commodities, and corrective measures shall be taken in time to restore the product quality to normal;

4. Select products to improve the reliability of the whole batch of products. Reasonable selection can have various reasons (such as raw material defects). Improper process measures. Operator negligence. Remove the initial failure products caused by production equipment failure and poor quality inspection, so as to improve the reliability of the whole batch of products;

5. Study the failure mechanism of the product. Through the reliability test of the product (including simulation test and field use test), we can understand the failure mode and failure rule of the product under different environment and stress conditions. According to the analysis of the product, the internal cause of the failure (i.e. failure mechanism) and the weakness of the product can be found, and corresponding measures can be taken to improve the reliability level of the product.

Environmental test, reliability test items and test standards are as follows:

1. Climate environment experiment (GB2423, GJB150A, GJB4, IEC60068, GB1032, GJB322A, GJB360A, GJB548, GB4208, GB899, TB3021, etc.):

1) Temperature test: high temperature test, low temperature test, temperature impact test, temperature change test, rapid temperature change test (the temperature change rate can reach 15 ℃/min), high temperature aging test/temperature cycle test.

2) Humidity (humidity) test: constant humidity and heat test, alternating humidity and heat test, high temperature and high humidity test (double 85 test, double 95 test);

3) Enclosure protection grade test: IP42, IP44, P54, IP55, IP65, IP66, IP67, IP68 protection grade certification and test service;

4) Three prevention tests: salt spray corrosion test (neutral salt spray test), alternating salt spray test, acid salt spray test), damp heat test (cold wet stability test), alternating damp heat test, mold test (mildew test, mildew test);

5) Special tests: low pressure test (altitude test), high pressure test, solar radiation test, rain test, wind and sand test, etc.

2. Mechanical environment test (GB2423, GJB150A, GJB4, IEC6068, GJB1032, GB322A, GB360A, GJB548, TB3058, GJB899, GB/T21563, ISO16750, etc.):

1) Vibration test: sine vibration test (frequency sweep durability test), random vibration test, broadband random vibration test, narrowband random vibration test, sine, random superposition test;

2) Impact test: half sine wave mechanical impact test, back peak sawtooth wave impact, impact response spectrum test;

3) Other experiments: drop test (free fall, repeated fall), collision test, acceleration test, etc.

3. Comprehensive environmental reliability test (GB2423, GJB150, AGJB899, etc.):

Temperature and humidity combination experiment, temperature and humidity, vibration comprehensive experiment (three comprehensive experiments).

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