Patent ID: 6460422
Filing Date: 2002-10-08
Classification: G01L

Abstract:
A torque measuring device comprising:an irradiation means for irradiating a light; a control means, operatively connected to the irradiation means adapted to branch the light into a plurality of lights as beams, control a beam diameter of each of the respective lights and a focusing depth thereof and irradiate the light regularly on a surface of a rotating member to be measured; a reflecting means, including a plurality of reflectors disposed on the surface of the rotating member, for reflecting the light along substantially a same path as that of irradiation so as to change reflection intensity of the light; a detecting means including a plurality of detectors for detecting the change of the intensity of each of the reflected lights and generating signals thereof; and a signal processing means for processing the signals from the detecting means and operating a rotation period on the basis of the signals from said detecting means to thereby calculate a torque of the rotating member to be measured.