What aspects are usually included in the reliability testing of electronic appliances?

Date：2024-01-23 15:48:48Views：70

The tests conducted to evaluate and analyze the reliability of electronic products are called reliability tests. For different products, different reliability testing methods can be chosen to achieve different goals. Reliability testing, also known as product reliability assessment, refers to the ability of a product to complete specified functions under specified conditions and within a specified time. This article has collected and organized some materials, hoping to have significant reference value for readers.

The purpose of conducting reliability tests on electronic appliances is:

1. Providing factory basis for manufacturers can directly test the quality and performance of products, which is beneficial for the improvement and enhancement of technical aspects of manufacturers, in order to better serve customers.

2. During use, customers may occasionally experience unpredictable events such as falling or being immersed in liquid, which can cause damage to the product. Reliability testing can be conducted to address these uncertain factors.

Reliability testing methods for electronic appliances:

1. Storage environment test

Test conditions: -20 ℃ 8H~60 ℃ 8H Humidity: 90%

Test method: After storing the machine in its complete packaging at high/low temperatures, it is restored to room temperature to inspect its appearance, structure, and performance.

Test criteria: No major abnormalities in appearance and mechanism, and no abnormalities in functionality during testing.

2. Bare metal drop test

Test conditions: In a normal temperature and humidity environment

Test method: Ensure that the electronic product is turned off and tested on a 64mm thick cement material with a 20mm thick wooden board attached to the surface. The front, back, and sides should each drop once, and the side button surface should not be tested. Falling height: 80CM

Test criteria: The shell structure must not be permanently damaged, and there should be no abnormalities in functionality after the test.

3. High temperature/low temperature start-up test

Test conditions: High temperature start: Place the product in a constant temperature and humidity machine at 45 ℃ and 80% RH; Low temperature start: Place the product in a constant temperature and humidity machine at 0 ℃

Test method: Keep the prototype in the corresponding constant temperature and humidity machine for 4 hours and test whether all functions are normal.

Test criteria: The prototype should be able to start normally under high/low temperature conditions, and all functions should be able to be realized normally.

4. Vibration test

Test conditions: The product is tested in packaging, and the vibration type is random vibration

Test method: The vibration frequency is 50Hz, the vibration time is 20 minutes in each direction, and the vibration test direction is X Y. Z,

Test judgment criteria: After the test is completed, check the machine according to the shipping inspection standards to see if there are any abnormalities. The vibration during operation is considered as the vibration of the machine, and whether it can continue to work normally.

5. Aging test

Test conditions: Normal start-up state at room temperature and humidity

Test method: Charge cycle, repeat cycle, repeat cycle to continue playing video; Turn the volume to maximum and set Repeat all playback mode.

Test criteria: Normal charging and discharging, no crashes, crashes, poor display, and abnormal sound output during playback.

6. Key lifespan test

Test conditions: In a state of no damage

Test method: Press all the buttons on the machine continuously for 5000 times to see their function and actual lifespan

Test judgment standard: If the test is less than 5000 times, it will be judged as unqualified

7. Insertion and extraction force test

Test conditions: Test in shutdown state

Test method: Use headphone fixtures, power plug fixtures, USB plug fixtures, TF card fixtures, HDMI fixtures, and continuously plug and unplug 1000 times.

Test judgment standard: If the test is less than 1000 times, it will be judged as unqualified.

8. Salt spray test

Test conditions: Test in shutdown state

Test method: Artificial simulation of salt spray environmental conditions is used to evaluate the corrosion resistance of products or metal materials. The salt spray concentration and test time are tested according to the actual requirements of the customer.

Test criteria: 1. Calculate the corrosion area and grade it (GB/T 6461);

2. Appearance description: whether there is rust, type of rust, degree of corrosion, whether there are bubbles/cracks, etc

3. Check the function (only for finished products);

4. Other evaluations: such as adhesion, pencil hardness, corrosion width, etc.

9. Waterproof and dustproof level test

Test conditions: Test in shutdown state

Test purpose: To verify the protective effect of the product shell

Test method: Use equipment such as water spray, water tank, and dust box to conduct varying degrees of testing on the product according to different IP level requirements. For specific testing methods and requirements, please refer to my other article: Reliability Testing - Introduction to the Basic Concepts of IP Level Testing and Testing Requirements for Each Level

Test criteria: The product should not have water ingress or dust accumulation inside.

10. UV aging test

Test conditions: Test in shutdown state

Test method: Aging test is the process of simulating the aging of products under various factors involved in actual usage conditions and conducting corresponding conditions to strengthen the experiment. UV aging mainly simulates the long-term exposure of products to sunlight when used outdoors, and simulates the effects of long-term sunlight exposure through UV radiation.

The above is the reliability testing related content of electronic appliances organized by Chuangxin Testing website, hoping to be helpful to you. Chuangxin Testing is a professional testing institution for electronic components, currently mainly providing integrated circuit testing services such as capacitors, resistors, connectors, MCU, CPLD, FPGA, DSP, etc. Specializing in functional testing of electronic components, appearance testing of incoming electronic components, anatomical testing of electronic components, acetone testing, X-ray scanning testing of electronic components, and ROHS component analysis testing. Welcome to call, we will be happy to serve you!