Magnetoelectric rotating speed sensor used for measuring wheel rotating speed

The invention discloses a magnetoelectric rotating speed sensor used for measuring a wheel rotating speed. The sensor comprises a shell, a permanent magnet, a magnetoelectric sensor and two groups ofelectromagnetic coil groups which are symmetrically arranged. The two groups of electromagnetic coil groups are located on the two sides of the magnetoelectric sensor. The magnetoelectric sensor is fixedly arranged in the shell. The magnetoelectric sensor comprises a lower piezomagnetic layer, a piezoelectric layer and an upper piezomagnetic layer which are successively superposed and fixed. The length direction of the lower piezomagnetic layer is parallel to the length direction of the upper piezomagnetic layer, and the length direction of the piezoelectric layer is vertical to the length direction of the upper piezomagnetic layer so that the magnetoelectric sensor is in a Z shape. The permanent magnet is fixedly arranged at the edge of a gear in a wheel driving mechanism. When the permanent magnet is aligned wit