Non-contact torque sensor

A non-contact torque sensor comprises a magnetic force generation component and a magnetic force conduction component. The magnetic force generation component comprises multiple radial magnet pairs evenly distributed on the same circumference. The magnetic force conduction component comprises two annular magnet yokes which are installed on the same non-magnetic frame and are arranged coaxially and oppositely, and the two annular magnet yokes are respectively an internal-ring magnet yoke which is provided with multiple magnetic conduction internal teeth and an external-ring magnet yoke which is provided with multiple magnetic conduction external teeth. A magnetic field produced by magnets in multiple groups of magnetic force collection assemblies of the torque sensor is transmitted via the magnetic conduction tooth pairs to the internal-ring magnet yoke, the external-ring magnet yoke, lead-out magnet yokes and the air gaps therebetween, thus forming a closed magnetic circuit. The radial directions of the inter