Magnetoelectric speed sensor is widely used in rotational speed measurement.In engineering practice

a transient high voltage appears when rotate axis starting

which has influence on subsequent signal processing circuit.Aiming at the above problem

magnetoelectric speed sensor which has an entirety circular ring structure is researched.Ansoft Maxwell is used to build a magneto-electric speed sensor model which has a structure of permanent magnet with eight-piece tile and measuring range 20N·m.A design proposal according to the simulation results is proposed.Meanwhile

the signal processing circuit is designed

and simulation results demonstrate that the designed circuit has good practical value.