What are the purposes and methods of product environmental reliability testing?

The ability or probability of a component, product, or system to perform its specified functions without failure under given conditions and over a certain period of time. Product reliability can be evaluated using metrics such as reliability, failure rate, and mean time between failures.

Environmental reliability refers to a product's ability to perform its specified functions under defined conditions and within a specified period of time. During the design and application processes, products are continuously exposed to internal and external climatic and mechanical environmental influences, yet they must still function properly. To verify this capability, testing equipment is required, and such verification generally consists of three parts: development testing, trial production testing, and mass production sampling inspection.

For products, higher reliability is always better. A highly reliable product can operate normally for extended periods—exactly what all consumers expect. In technical terms, the higher the product's reliability, the longer it can operate without failure.

The reliability experienced during actual product use is known as operational reliability. Operational reliability can be further divided into inherent reliability and in-use reliability. Inherent reliability is the reliability that must be established by the product's designers and manufacturers, based on reliability planning, covering every stage from raw material and component selection through design, manufacturing, testing, to final product release. In-use reliability, on the other hand, refers to the reliability of a manufactured product after being affected by factors such as packaging, transportation, storage, installation, operation, and maintenance.

The Importance of Reliability Testing

Reliability is closely related to the development of the electronics industry, and its significance can be illustrated by three characteristics of electronic products.

Firstly, the complexity of electronic products is constantly increasing. The earliest radio receivers used for mining were very simple. Subsequently, various types of radios, recorders, video recorders, communication devices, radars, guidance systems, electronic computers, and aerospace control equipment emerged, with the complexity continuously increasing. The significant indicator of the complexity of electronic products is the number of components required. The reliability of electronic products depends on the reliability of the components used, because any failure of a component or a solder joint in the electronic product will lead to a system failure. Generally speaking, the more components used in an electronic product, the more serious the reliability problem becomes, and the higher and more stringent the requirements for the reliability of components are to ensure that the product or system can work reliably.

Secondly, the operating environment of electronic products is becoming increasingly harsh. From laboratories to the wild, from tropical regions to polar regions, from land to the deep sea, from high altitudes to the universe, they are exposed to different environmental conditions. Besides temperature and humidity, the influence of seawater, salt fog, shock, vibration, cosmic particles, various radiation, etc. on electronic components leads to an increased possibility of product failure.

Reliability has been listed as an important quality indicator for products for assessment and inspection. For a long time, people only used the technical performance indicators of the product as the mark to measure the quality of electronic components. This only reflects one aspect of product quality and cannot reflect the overall picture of product quality. Because if the product is unreliable, even if its technical performance is excellent, it cannot be put into use. In a sense, reliability can comprehensively reflect the quality of the product.

Reliability Engineering is a comprehensive discipline. Its development can drive and promote the development of product design, manufacturing, use, materials, processes, equipment, and management, raising electronic components and other electronic products to a new level. That's why reliability has formed a specialized discipline and is studied as a specialized technology.

To confirm that the product can work normally in these environments, national standards and industry standards require products to undergo some test items under simulated environmental methods. Guangdong Sanmu Technology provides the following environmental reliability testing equipment for customers:

Explosion-proof High and Low Temperature Cycling Test Chamber

The explosion-proof high and low temperature test chamber is widely used in industries such as batteries, aerospace, aviation, electronics, and automobiles for conducting accelerated temperature aging tests, alternating tests, and constant temperature tests on electronic and electrical products, materials, components, and equipment. It can also be used for routine high and low temperature tests, low-temperature storage, in order to evaluate the behavior and performance of the test items under given environmental conditions. The product complies with standards such as GB2423.1, GB2423.2, GJB150.3, GJB150.4, IEC, and MIL.

Constant Temperature and Humidity Test Chamber

This equipment is used to test the performance of materials under various environments and to test the heat resistance, cold resistance, dryness resistance, and humidity resistance of various materials. It is suitable for quality testing of electronic, electrical, mobile phones, communications, instruments, vehicles, plastic products, metals, food, chemicals, building materials, medical products, aerospace, and other products. It complies with standards: GB/T5170.5-2008, GB/T10586-2006, GB/T2423.1-2008 Test A, GB/T2423.2-2008 Test B, GB/T2423.3-2006 Test Ca, GB/T2423.4-2008 Test.