Design of Low-cost Automobile Oil Level Sensor Detection Device

In today's society with highly developed transportation, automobile transportation accounts for a large proportion, which has promoted the vigorous development of automobile manufacturing. The fuel tank level of an automobile is an important measured parameter in the driving process of the car, and the fuel quantity sensor is an indispensable part of the quantity measurement system. The importance of the quality inspection process at the factory is self-evident. At present, most of the vehicle oil quantity sensors use reed switch liquid level sensors, and most of the current factory detection of the sensors is manual way, which not only requires a lot of labor costs, but also have high missed detection rate. This article designs a low-cost automotive oil level sensor detection device, which uses MCU and constant current source circuit instead of the traditional manual instrument detection. It also has on-site display function and threshold storage function. At the same time, the device can automatically identify the sensor model and execute different detection procedure without manual settings when the sensor is connected. The test results show that this device greatly improves the detection efficiency and accuracy, and reduces the cost of testing.