Sensor for non-contact torque measurement on a shaft as well as a measurement layer for such a sensor

Sensor for non-contact torque measurement on a shaft comprising:

• a measurement layer support, which has a first end region for torque-coupled fixing on a shaft, and a second end region which is an annular disc and extends essentially at right angles to an axis of the shaft when the measurement layer support is fitted;
• a downstream element and a cylindrical surface torque-coupled fixed between the first and second end regions, on which cylindrical surface a soft-magnetic and magnetostrictive measurement layer is arranged which is coaxial with respect to the shaft when the measurement layer support is fitted;
• a measurement coil support, fitted with a measurement coil that produces an electrical output signal as a function of a mechanical stress state of the measurement layer, the measurement coil being coaxially opposite the surface of the measurement layer;
• and
• a holder on which the measurement coil support is fixed without being supported on the measurement layer support;
• wherein the axial structural length of the measurement layer support substantially corresponds to the axial extent of the measurement layer, and the second end region of the measurement layer support is located in the axial region occupied by the measurement layer.