A gear speed sensor
A gear speed sensor is a sensor used to measure the rotation speed and position of a gear in a mechanical system. Its working principle mainly relies on sensing the change in gear tooth profile, and detecting the rotation of the gear in real time through electromagnetic, photoelectric, magnetic induction and other technologies. The working principle of a common gear speed sensor is as follows:
Working principle
Magnetic induction principle: Gear speed sensors usually detect the rotation of gears by installing magnets or magnetic markers on the gears, and cooperating with Hall effect sensors, magnetoresistive sensors, etc. Whenever the gear rotates, the sensor senses the change in the magnetic poles on the gear, thereby generating a signal output, and then calculating the speed or angular displacement of the gear.
Photoelectric principle: Some gear speed sensors use photoelectric sensors to detect specific marks or tooth profile changes on the gear. The sensor emits a light beam and receives the reflected signal of the light. When the tooth profile or mark on the gear passes by, the sensor receives the change in the light reflection signal, thereby calculating the rotation speed or angle of the gear.
Encoder principle: Some gear speed sensors combine encoder technology to directly measure the rotation angle and speed of the gear. This type of sensor usually includes a rotating component with an optical or magnetic encoder disk, which can accurately measure the speed and position of the gear
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