What is a magnetoelectric sensor and its roles?

Last Update Time: 2018-12-25 11:32:53


 Magnetoelectric sensors are used to measure speed, displacement, vibration, torque and other parameters. The converter that transforms the measured parameters into an induced electromotive force is called a magnetoelectric sensor or an inductive sensor The magnetoelectric sensor produces a wire in a magnetic field based on induced electromotive force.

 

According to the law of electromagnetic induction, the induced electromotive force E of the coil with a w turn is proportional to the speed of change of the magnetic flux passing through the coil. If the mechanical quantity directly controls the flux variation of the chain of the sensor coil, the sensor can directly move the mechanical motion without the intermediate conversion element convert it to a proportion of the Telecom number.

 

When the structure of the sensor has been timed, the magnetic induction intensity and the coil length L are constant, so the induced electromotive force is proportional to the relative velocity of the coil to the magnetic field. So the magnetoelectric sensor can only be used to determine the linear speed or angular velocity, but because the speed and displacement ( or acceleration ) are only one integral ( or differential ) relationship, so if an integral circuit is connected in the measuring circuit, the output electromotive force is proportional to the displacement; if a differential circuit is connected in the measuring circuit, the output potential is proportional to the acceleration of the motion. In this way, the magnetoelectric sensor can be used to measure the displacement and acceleration of motion in addition to measuring speed. The output of the magnetoelectric sensor in addition to the magnitude of the EMF, can also be the frequency value of the output EMF, such as the magnetoelectric tachometer is an example.

This article is from Allicdata Electronics.