2 pcs
The speed sensor uses magnetoresistance as the sensing element and is a new type of speed sensor. The core component uses magnetoresistance as the detection component, and then uses a new signal processing circuit to reduce noise and improve functions. By comparing with the output waveforms of other types of tooth speed sensors, the error of the measured speed is extremely small and the linear characteristics are very consistent. The sensing objects are magnetic materials or magnetically permeable materials, such as magnetic steel, iron and electrical steel. When the magnetic or permeable material with protrusions (or depressions) on the measured object rotates as the measured object, the sensor outputs a pulse signal related to the rotation frequency to achieve the purpose of speed measurement or displacement detection.
There is a Hall semiconductor chip in the magnetic field, and a constant current I passes through the chip from A to B. Under the action of Lorentz force, the electron flow of I is deflected to one side when passing through the Hall semiconductor, causing the film to generate a potential difference in the CD direction, which is the so-called Hall voltage.