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Infrared thermal imaging technology has been used in the automotive field for a long time. In addition to the routine infrared thermal imager inspection of electrical equipment in automobile manufacturers, it is also widely used in automobile research and development. The infrared thermal imager technology can diagnose the relevant defects of automobile design, structure, etc. more effectively, faster and more accurately.
The application of infrared in automobile industry mainly includes the following points
1.Engine fault diagnosis:
Generally speaking, the engine must undergo vibration and noise tests to evaluate the overall structure. However, for some minor defects of the engine (such as minor cracks, subtle structural design differences, etc.), it is difficult to accurately diagnose them through the first two methods. Infrared thermal imaging technology can reflect subtle structural defects as subtle temperature differences, so as to achieve the diagnostic effect that cannot be achieved by other methods. The above figure is the thermal map of the engine inside the car, so we can have a clear view of the temperature distribution inside the car. The temperature of each component position can accurately reflect the performance of the engine in actual work.
2.Brake system fault diagnosis:
The braking diagnosis of the vehicle depends on many factors. According to the weight distribution, vehicle size, vehicle height and other conditions, the front braking system should bear a large proportion of the braking effect. Using infrared thermal imager to compare the temperature of the front and rear wheels of the vehicle, this method is simple and feasible. Generally speaking, the temperature of the front wheel should be higher than that of the rear wheel. If the temperature of the two front wheels (or rear wheels) is also different, it can be judged that there is a blocked oil path in the braking system, which may be due to air. The above figure shows the actual temperature distribution of the front wheel.
3.Body air tightness test:
The quality of the air-conditioning system of the car is very important to the use of the car, and the overall air tightness of the car body will directly affect the efficiency of the air-conditioning system. During the vehicle test, turn on the air conditioning system in the vehicle (operate for a period of time), and then use the infrared thermal imager to capture the heat map of the whole vehicle. If air leakage occurs at car doors, glass joints, etc., you can see that the temperature here is different from the external ambient temperature. Thus, the overall air tightness of the vehicle body can be accurately analyzed and evaluated.
4.Inspection of window heating wire:
The heating wire is located in the rear glass of the car, and its normal operation will directly affect the safe driving of the car in foggy conditions. Using infrared thermal imager can make a comprehensive and rapid diagnosis of the distribution of the whole heating wire.
5.Inspection of automobile exhaust pipe:
The high temperature of the exhaust pipe can reflect the insufficient combustion, so it can indirectly evaluate the working condition of the engine system. If the temperature distribution of the pipeline is uneven, it can reflect that the pipeline itself has structural defects. In addition, thermal imagers can be used to detect and diagnose the bearing system, electrical equipment and body comfort of the automobile chassis.
6.Seat heating fault diagnosis:
Like the detection of window heating wire, the use of infrared thermal imager can make a comprehensive and rapid detection of the seat heating system to determine whether there is a problem in the system and accurately locate the fault point.
7.Stamping process inspection
According to statistics, 60% - 70% of the parts on the car are produced by stamping process. This is a very important step in automobile manufacturing. Therefore, stamping technology has an important impact on the product quality, production efficiency and production cost of automobiles.
Stamping central control panel
