Magnetoelectric sensor is a kind of non-contact sensor and has some useful characteristics, such as non-contact, high response frequency, low power waste, high reliability, long life-span and etc.

The basic principle, structure design and calculation of magnetic circuit for touchless magnetoelectric rotational velocity sensor are reported. The test data and testing result are also analyzed.

In accordance with the requirements in the test of a certain magnetoelectric Angle sensor, weak signal acquisition and analysis system based on DAQ2204 data acquisition card is introduced.