The importance of reliability test of electronic products is briefly described

Date：2022-01-26 13:40:00Views：930

Reliability test refers to measuring and verifying the reliability of products through tests. The research finds out the weak links of products under the condition of limited samples, time and use cost. Reliability test is the general name of various tests carried out to understand, evaluate, analyze and improve the reliability of products. It is mainly to predict the quality of the product from the factory to the end of its service life. After selecting the environmental stress with high similarity to the market environment, set the degree and application time of environmental stress. The main purpose is to correctly evaluate the reliability of the product in a short time as possible.

Reliability test is to determine whether the products that have passed the reliability appraisal test and have been transferred to mass production meet the specified reliability requirements under the specified conditions, and to verify whether the reliability of the products decreases with the changes of process, tooling, workflow, parts quality and other factors during mass production. Only through these, can the product performance be trusted and the quality of the product be excellent.

Test purpose

The purpose of reliability test is to ensure that the product maintains its functional reliability in all environments such as expected use, transportation or storage within the specified service life. It is to expose the product to natural or artificial environmental conditions and undergo its action, so as to evaluate the performance of the product under the actual use, transportation and storage environmental conditions, and analyze and study the influence degree and action mechanism of environmental factors. Through the use of various environmental test equipment to simulate the high temperature, low temperature, high temperature and high humidity and temperature changes in the climatic environment, accelerate and stimulate the possible failure of the product in the service environment, so as to verify whether it meets the expected quality objectives in R & D, design and manufacturing, so as to evaluate the whole product and determine the reliability life of the product.

1. Environmental test

Assessing the adaptability of products under various environmental conditions (vibration, impact, centrifugation, temperature, thermal shock, hot tide, salt spray, low pressure, etc.) is one of the important test methods to evaluate the reliability of products.

2. Life test

A method to study the life characteristics of products. This method can simulate various service conditions in the laboratory. Life test is one of the most important and basic items in reliability test. It is to examine the law of failure (damage) with time under specific test conditions.

3. Screening test

A non-destructive test for full inspection of products. Its purpose is to select products with certain characteristics or products prone to early failure, so as to improve the service reliability of products. In the manufacturing process of products, some products have so-called early defects or faults due to material defects or out of control of process. If these defects or faults can be eliminated as soon as possible, the reliability level of products in actual use can be guaranteed.

4. Field use test

It is carried out on the use site and can truly reflect the reliability of the product. The obtained data is of high value for the reliability prediction, design and guarantee of the product. The field application test plays an important role in formulating the reliability test plan, verifying the reliability test method and evaluating the accuracy of the test.

5. Qualification test

It is a test to evaluate the reliability level of products. It is a sampling scheme formulated according to the sampling theory. It carries out the identification test under the condition of ensuring that the producers do not cause the products with quality meeting the standard to be rejected.

Significance of reliability design

1. Reliability runs through the whole life cycle of electronic products. There is a reliability problem from product design, manufacturing to installation, use and maintenance, but the premise is to pay attention to the reliability design first;

2. With the progress of science and technology and the needs of economic and technological development, electronic products are increasingly developing in the direction of multi-function, miniaturization and high reliability;

3. Electronic equipment or systems are widely used in various places and will encounter various complex environmental factors, such as high temperature, high humidity, low pressure, harmful gas, mold, impact, vibration, radiation, electromagnetic interference

4. The measures taken to improve the reliability in the design stage cost the least and have remarkable effect compared with the measures taken in the later stages.