And magnetoelectric rotating speed sensor is used for measuring wheel rotating speed

The utility model discloses a magnetoelectric rotating speed sensor for measuring the rotating speed of a wheel. The device is characterized by comprising a shell, a permanent magnet, a magnetoelectric sensor and two electromagnetic coil groups which are symmetrically arranged, the two electromagnetic coil sets are located on the two sides of the magnetoelectric sensor. The magnetoelectric sensoris fixedly arranged in the shell; the magnetoelectric sensor comprises a lower piezomagnetic layer, a piezoelectric layer and an upper piezomagnetic layer which are sequentially overlaid and fixed. The length direction of the lower piezomagnetic layer is parallel to the length direction of the upper piezomagnetic layer; the length direction of the piezoelectric layer is perpendicular to the lengthdirection of the upper piezomagnetic layer; the permanent magnet is fixedly arranged at the edge of a gear in the wheel driving mechanism, and when the permanent magnet is aligned with the magnetoelectric sensor, the central