Magnetoelectric speed sensors utilize the principle of electromagnetic induction for speed measurement. A coil is wound around the front end of the sensor. When the gear rotates, the magnetic field lines passing through the sensor coil change, generating a periodic voltage in the coil. By processing and counting this voltage, the gear's rotational speed can be measured. This sensor features small size, robustness, reliability, long lifespan, and requires no power supply or lubrication. It can be used with most secondary instruments. The housing is made of stainless steel, providing a strong output signal, good anti-interference performance, and easy installation and use. It can be used in harsh environments such as those with smoke, oil fumes, and water vapor.
Working principle of magnetoelectric speed sensor
Magnetoelectric speed sensors measure rotational speed based on the principle of magnetoelectric induction. A magnetoelectric speed sensor consists of an iron core, magnets, and an induction coil. When the object being measured rotates, the sensor's coil generates magnetic field lines. The rotation of the gears cuts these magnetic field lines, and the change in magnetic resistance in the magnetic circuit generates an electromotive force within the induction coil.
The voltage generated by the induced electromotive force of a magnetoelectric speed sensor is related to the rotational speed of the object being measured. The faster the object rotates, the larger the output voltage; that is, the output voltage is directly proportional to the rotational speed. However, when the rotational speed of the object exceeds the measurement range of the magnetoelectric speed sensor, the magnetic circuit loss will be too large, causing the output potential to saturate or even sharply decrease.
Applications of magnetoelectric speed sensors
The ZLS-Px angle sensor can monitor the rotation speed of the wind turbine shaft in real time without contact, even under light wind conditions, and provide feedback data to ensure stability.
Workpiece machining speed monitoring allows for real-time monitoring of the workpiece speed on a CNC machine tool, which is helpful for the precision machining of the workpiece.
Steel pipe coating speed monitoring. Real-time monitoring of the coating speed of the steel pipe ensures uniform paint application.
