Types of Vehicle Speed Sensors?
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Vehicle speed sensors are divided into three types: magnetic speed sensors, Hall-type speed sensors, and photoelectric speed sensors. The main functions of the vehicle speed sensor are as follows: 1. The vehicle speedometer displays the driving speed of the car through the swing of a pointer. 2. Simply put, the speedometer contains a system (including a rotating disk with a pointer shaft, a rotating shaft with permanent magnets, bearings, hairsprings, and other components) that controls the swing of the pointer. The swing amplitude of the pointer is ultimately determined by the rotational speed output from the transmission (i.e., the rotating shaft of the speedometer is driven by a flexible shaft, which is connected to the worm gear in the worm-gear transmission pair on the output shaft of the car's transmission or transfer case). 3. Due to the manufacturing process of the components themselves, assembly errors, natural wear during use, and changes in the magnetism of magnetic components, all can cause indication errors in the speedometer.