Torque sensor

The invention discloses a torque sensor, and relates to the technical field of torque measurement. The torque sensor comprises an installation mechanism and an optical sensing assembly, and the installation mechanism is used for being arranged on a detected rotating shaft in a sleeving mode; the optical sensing assembly comprises a light-emitting part and an optical position detection part, the light-emitting part and the optical position detection part are both installed on the installation mechanism, and the light-emitting part is used for generating light spots; and the optical position detection piece is used for detecting the displacement of the light spot, and when the detected rotating shaft rotates, the light emitting piece and/or the optical position detection piece are/is driven to rotate to generate the displacement so as to obtain the torque value of the detected rotating shaft. According to the embodiment of the invention, the light spot displacement is detected through an optical position sensin