A Hall effect gear tooth speed sensor is a non-contact speed measurement device designed based on the Hall effect principle. It is mainly used to detect the rotational speed, position, and direction of ferrous metal gears or racks, and is widely used in the automotive and industrial fields.
Working Principle of a Hall Effect Gear Tooth Speed Sensor
When the gear rotates, the tooth tips and tooth grooves alternately pass near the Hall element, causing a periodic change in the magnetic field strength. The magnetic field strengthens when the tooth tips are close and weakens when the tooth grooves are far apart. This change causes the Hall element to output a pulse signal proportional to the rotational speed, which is then processed by the circuit and converted into a standard square wave output.
Characteristics of a Hall Effect Gear Tooth Speed Sensor
Non-contact Measurement
No mechanical contact with the gear is required during measurement, effectively avoiding wear and extending the gear's lifespan.
Strong Anti-interference Capability
The Hall element's output signal is minimally affected by environmental factors such as temperature and humidity, allowing for accurate measurement even in harsh environments.
Stable Output Signal
The Hall effect gear tooth speed sensor outputs a rectangular wave with amplitude independent of rotational speed, facilitating subsequent circuit processing.
Multifunctionality
Supports measurement of various parameters, including not only rotational speed but also angle, flow rate, and direction of rotation.
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