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As an important part of vehicle safety, car alarms work year-round in various harsh environments, such as extreme cold, heat, humidity, dust, and other complex conditions, making their stability and reliability crucial. To ensure that the alarm can operate normally in different environments, a series of environmental reliability tests must be conducted.
High-Temperature Test
In high-temperature environments, electronic components can easily be damaged due to excessive heat. By placing the alarm in a High and Low Temperature Test Chamber, adjusting the ambient temperature to around70℃, and maintaining it for24hours, the operational status of the alarm under high temperatures is checked to ensure it can function normally in hot weather. If the alarm can still issue alerts and maintain its functionality after the test, it indicates stability in high-temperature environments.
Low-Temperature Test
Similarly, in cold regions, vehicles are exposed to low temperatures for extended periods, and the alarm needs to work effectively in extreme cold. By placing the alarm in a High and Low Temperature Test Chamber at a temperature of-40℃ for48hours, then powering it on to check if it can still issue alerts correctly, it can be determined if the alarm has reliability in extremely cold conditions.
Humid and hot environments have significant impacts on electronic equipment, especially car alarms, which can easily experience component corrosion due to moisture in such climates.
By using a Constant Climatic Chamber, the temperature and humidity inside the chamber can be precisely controlled to simulate long-term humid and hot conditions. The alarm is placed in the test chamber for 6cycles according to the set humid and hot cycle, and its functionality is finally checked. If the alarm can maintain stable operation in high humidity conditions, it indicates strong moisture resistance.
In rainy or other humid conditions, car alarms may be exposed to water intrusion. Therefore, testing the waterproof performance is crucial. Waterproof Test Chamber is used to simulate the working conditions of car alarms under water immersion to ensure their waterproof function meets the standards.
In the test, the alarm is heated to70℃, then using the Waterproof Test Chamber the environment is simulated with spraying or immersion, and after100spray cycles, the alarm's functionality is checked to see if it still works properly. This process helps verify whether the alarm can maintain normal operation during heavy rain or in humid environments with water intrusion.
Besides water, dust is also one of the main factors affecting the normal operation of car alarms. Especially in areas with a lot of sand and dust, dust can easily enter the alarm, affecting its sensitivity and even causing malfunction. Using a Dustproof Test Chamber, the working conditions of the alarm in dusty environments can be simulated.
In the Dustproof Test Chamber, the alarm and standard dust are mixed, and by simulating the movement of dust in the air,20cycles of testing are conducted to observe if it can still issue alerts correctly. If the alarm’s functionality is not affected by dust after the test, it indicates strong dust resistance, suitable for use in dusty environments.
During vehicle operation, vibration is inevitable, especially on rough and uneven roads, where the alarm may endure intense vibrations. By using a High-Frequency Vibration Table, different frequencies and intensities of vibration environments can be simulated to test the durability of the alarm under such conditions.
The alarm is fixed on the High-Frequency Vibration Table and vibration tests are conducted according to three axial directions, each direction lasting8hours, testing its performance in a vibrating environment. If the alarm can maintain normal operation after high-frequency vibration tests, it indicates it has vibration resistance and can adapt to the vibration conditions of vehicle operation.
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