Torque/position transducer

摘要

A torque/position transducer is positioned between the valve stem of a valve and a valve operator adapted to open and close the valve and includes a body including an input lug adapted for mating the engagement with the output lug of the valve operator and an output lug adapted for mating the engagement with the valve stem of the valve. A plurality of strain gauges are mounted on the body of the torque/position transducer and function to generate an output signal indicate of the amount of torque necessary to open or close the valve. The torque/position transducer further includes a movable ring secured to the body for rotation therewith under the action of the valve operator and a fixed ring rotatably received on a reduced diameter portion of the movable ring and secured against rotation under the action of the valve operator. An infrared signal generator on the movable ring directs a signal into engagement with a reflective tape on the fixed ring which is reflected to an infrared detector also mounted on the movable ring to generate an output indicative of the positioning of the valve under the action of the valve operator.