The invention relates to a magnetoelectric rotating speed sensor suitable for large-spacing measurement. The magnetoelectric rotating speed sensor comprises an armature framework, an enameled wire coil, a shell, an insulating sleeve, an insulating spacer, a lead, a connector and a shaft end bolt embedded with a permanent
magnet, wherein the armature framework, the enameled wire coil, the insulating sleeve and the insulating
gasket are assembled into an
assembly, the
assembly is installed inside the shell, the enameled wire coil and the connector are connected through a lead, and after connection is completed,
potting is performed and the connector is fixed to the shell to form a
magneto-electric rotating speed sensor sensitive
assembly, the shaft end bolt is installed on a rotating shaft to be measured, periodic
magnetic field changes are formed through the permanent
magnet, and the assembly is installed in the
magnetic field change range, so that the enameled wire coil generates sinusoidal
alternating current signals, and then the
alternating current is periodically converted into revolutions. The magnetoelectric rotating speed sensor has the advantages that large-spacing non-contact measurement between the sensor and the rotating shaft can be realized, the output amplitude is large, and the vibration resistance is strong.