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Reliability test

Reliability testing is an activity to evaluate the functional reliability of a product in all environments such as expected use, transportation or storage within the specified life span. It is to expose the product to natural or artificial environmental conditions, so as to evaluate the performance of the product under the environmental conditions of actual use, transportation and storage, and analyze and study the influence degree and action mechanism of environmental factors. By using a variety of environmental test equipment to simulate the high temperature, low temperature, high temperature, high humidity and temperature changes in the climate environment, to accelerate the reaction of the product in the use environment, to verify whether it achieves the expected quality objectives in R & D, design and manufacturing, so as to evaluate the overall product and determine the reliability life of the product.
 
Reliability test can be divided into environmental test, life test, special test and field test.
 
(1) Reliability environmental test
 
This test includes many items, mainly including: ① climatic conditions, such as temperature, humidity, air pressure, wind and snow, salt fog, corrosive gas, etc.; ② mechanical conditions, such as vibration, shock, centrifugal, collision, drop, weight loss, noise, shock wave, etc.; ③ radiation conditions, such as solar radiation, nuclear radiation, etc.
 
(2) Life test
 
Life test is an extremely important part of reliability test. Through this kind of test, we can understand the life characteristics and failure rules of products, and calculate the reliability indexes such as failure rate and average life of products. The life test of products can be divided into long-term life test and accelerated life test according to the length of time.
 
(3) Special test
 
Special test is to test and check the relay with special instrument. This kind of test is not only used in reliability test, but also in reliability screening test. Such as X-ray inspection, infrared inspection, helium mass spectrometry leak detection, radioactive tracer leak detection, etc.
 
(4) Field test
 
The environmental condition of field test is the actual condition of product use. In the field test, the samples can be more and the time can be longer. Through this experiment, practical statistical data can be obtained, which provides more accurate basis for improving and improving product quality.
 
Reliability test items:
 
1. Climate environment test: high temperature test, low temperature test, temperature and Humidity Cycle / constant humidity and heat test, cold and hot impact test, rapid temperature change test, low pressure test, light aging test, corrosion test, etc.
 
2. Mechanical environment test: vibration test, impact test, collision test, drop test.
 
3. Comprehensive environmental test: temperature + humidity + vibration / impact / collision, halt / Hass / hasa, temperature and humidity stacking test, high pressure cooking test.
 
4. Packaging materials and packaging transportation test: environmental temperature and humidity test, stacking test, packaging compression test, vibration test, impact test, drop test, collision test, horizontal clamping test, low pressure test.
 
5. IP protection test: dust proof test, waterproof test.
 
6. Physical performance test: hundred grid test, wear test, scratch test, plug test, bending test, color fastness test, fire / combustion test; Rocking test, key life test, hardness test, drop weight impact / pendulum impact test, tensile strength / compressive strength / yield strength test, melt index test.
 
7. EMC environment test: RF performance test, SAR test, OTA test, HAC test, tcoil test, digital TV performance test, audio and video product performance test, satellite navigation product (GPS) performance test, flat panel display performance test, China medical device registration test, China telecom network access license test.
 
8. Electrical performance test: temperature rise test, withstand voltage test, insulation resistance test, dielectric strength test, contact resistance test, surface resistivity test, grounding resistance test.
 
9. Failure analysis test: surface / pole surface micro measurement and analysis, non-destructive measurement and analysis, electrical performance measurement and analysis, physical performance measurement and analysis, welding process measurement and analysis, PCB / PCBA measurement and analysis, electronic components measurement and analysis, plastic / rubber / polymer material measurement and analysis, metal material measurement and analysis.

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