The Role Of The Sensor Magnet

A sensor is a detection device that is widely used in many industries such as the automobile industry, communication electronics, and industrial automation. It is composed of permanent magnets, detection gears, internal gears, etc., forming a closed detection magnetic field circuit. When the detection gear rotates with the shaft of the sensor, the magnetic flux changes, and an induced voltage whose frequency is proportional to the magnetic flux is established at both ends of the coil. The magnetic flux fluctuates with the frequency f=rotational speed (r/min)×number of teeth/60(Hz), and is output as the rotational speed signal of the sensor.

 

Why is there a magnet on the sensor? What is the main purpose of a magnet mounted on a sensor?

 

The Hall sensor is used to detect the magnetic field, so it is normal to use a magnet for the test, and the magnet mainly plays the role of detecting the pulse signal.

 

What are the main sensors that need magnets?

 

Non-contact sensors use magnetic materials, such as Hall sensors, inductive sensors, etc., which work with magnetic steel to detect the size of the magnetic field, or use this principle to add magnetic materials to the sensor to detect ferromagnetism. Material.