DEVICE FOR MEASURING ROTATION ANGLE AND/OR TORQUE

摘要

PCT No. PCT/DE88/00468 Sec. 371 Date Mar. 2, 1990 Sec. 102(e) Date Mar. 2, 1990 PCT Filed Jul. 28, 1988 PCT Pub. No. WO89/02058 PCT Pub. Date Mar. 9, 1989.A measuring device for contact-free measuring of a rotation angle and/or torque of shaft comprises two coaxial bodies fastened on shaft stubs and rotatable relative to one another. The bodies have on their adjacent outer surfaces an equal number of areas having high and low electrical conductivity alternating in the circumferential direction. The bodies are enclosed by coils connected in a Wheatstone bridge circuit. A high-frequency alternating current flows through the coils and produces a magnetic alternating field which generates eddy currents in the outer surface areas of the two bodies in proportion to the magnitude of the surfaces of the two bodies penetrated by the magnetic alternating field.