| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 91 === This thesis is concerned with the development of non-contact rotating shaft torque sensor. The torque sensor uses strain gauges to measure the rotating shaft torque, and uses the Wheatstone bridge balanced circuit to convert the shaft stress into a DC voltage signal to calculate the torque value. Rotary transformers are used for non-contacting coupling of excitation and output to and from the rotating strain-gauge bridge. The performance evaluations of torque sensor prototype are conducted with the speed range of 0 to 3000 rpm and torque measuring range of 0 to 1 kg-m. The static experimental results of torque sensor prototype show that the total linearity error is 3.5%, the repeat error is 1.7%, the hysteresis error is 0.9%, and output voltage is 20mV for 0.1 kg-m torque. Other advantages of the proposed system include low-cost, easy calibration and longer lifespan.
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