Working principle of SZCB-01 series magneto-resistive speed sensor

Magnetic Hall Effect Speed Sensor is a sensor used to measure the rotational speed of rotating objects. Its working principle is based on Hall effect and magneto-resistance effect.
In the main part of the sensor, there is a pair of magnetic poles, which are named as the South Pole and the North Pole respectively. By fixing the pair of magnetic poles on the rotor on the rotating shaft, the rotation angle and speed on the shaft can be tracked. At rest, the Hall element is located between the north and south magnetic poles. When the rotor starts to rotate, the magnetic field intensity between the north and south poles will change accordingly, and the Hall element will be subjected to force.
Hall element is a semiconductor device with some carriers inside, usually electrons. Under the action of magnetic field, the carrier will be affected by Lorentz force in its direction of motion, resulting in potential difference. This phenomenon is called Hall effect. The sensor can calculate the rotor speed by measuring the potential difference output by the Hall element.
In addition, the magneto-resistive speed sensor also uses the magneto-resistive effect. When the carrier passes through some materials, the magnetic moment of the molecules inside the material is inconsistent, which will hinder the movement of the carrier, thus generating resistance. Under the action of magnetic field, the magnetic moment of molecules inside the material will change, and the resistance will also change. The sensor can further calculate the rotor speed by measuring the change of resistance.
Combining the above two effects, the SZCB-01 series magneto-resistive speed sensor can measure the speed of rotating objects quickly and accurately, and has the advantages of high accuracy, high reliability and strong anti-interference ability. It is widely used in machinery, automobile, aerospace and other fields.

The classification of SZCB-01 series magneto-resistive speed sensor

The SZCB-01 series magneto-resistive speed sensor can be classified according to the measuring principle, measuring range, installation method and other different ways.
According to the measuring principle, magneto-resistive speed sensor can be divided into Hall effect magneto-resistive speed sensor, magneto-resistive speed sensor, magnetostrictive magneto-resistive speed sensor and other different types.
According to the measurement range, the magneto-resistive speed sensor can be divided into small range, medium range and large range speed measurement sensors.
According to the installation method, the magneto-resistive speed sensor can be divided into two types: contact speed sensor and non-contact speed sensor. The contact speed sensor needs to contact with the shaft, while the non-contact speed sensor can measure the speed without contacting the shaft.

Reasons for failure of SZCB-01 series magneto-resistive speed sensor

There are several reasons for magneto-resistive speed sensor failure, including:
Sensor element damage: This may be caused by physical damage, exposure to high temperature or electromagnetic field or other external factors.
Connector or wiring problem: If there is a problem with the wiring or connector, the sensor may not be able to transmit data accurately or at all.
Power supply problem: If the power supply of the sensor is unstable or insufficient, the sensor may not work properly.
Environmental factors: exposure to harsh environment, such as extreme temperature or high humidity, may cause sensor damage or failure.
Manufacturing defects: Like any electronic device, the magneto-resistive speed sensor sometimes has manufacturing defects, leading to its premature failure.
It should be noted that the regular maintenance and calibration of the magneto-resistive speed sensor can help prevent or identify the sensor before causing the sensor failure.

The output of SZCB-01 series magneto-resistive speed sensor

The output of the magneto-resistive speed sensor is usually a pulse signal, and the frequency of the pulse is proportional to the speed. For example, when the detected target object passes through the sensor at a certain speed, the change of magnetic field inside the magneto-resistive sensor will cause the change of electrical signal inside the sensor coil, and generate a pulse signal output of a certain frequency. This pulse signal can be processed through the receiving circuit to realize the speed monitoring of the detected object.