Capteur de deplacement et capteur de couple

摘要

An optical displacement sensor is used to measure the rotary displacement between two shafts (2, 4) which rotate together. By connecting the shafts (2, 4) together by means of a torsion bar (6), the sensor may be used to measure transmitted torque. The sensor comprises first and second coaxial discs (10, 12) mounted on the shafts (2, 4) and having slots (16, 18) formed therein. A light source (20) directs light through the slots (16, 18) onto an array (22) of photodetectors and a data processor (24) determines the displacement or torque from the positions on the array (22) of images of the slot edges.