Torque transducer
In the control of systems having rotating drive shafts, torque and speed are the fundamental parameters. It is well known to provide a torque measuring device for measuring a torque between a load side and a drive side of a torque transmission shaft connected to a prime mover such as a motor or engine, by detecting a torsion at a torque transmission shaft or torque detector shaft connected between the load side and the drive side of the torque transmission shaft. Torque transducers are typically used with power tools that drive threaded fasteners. These power tools may be powered by pneumatic drivers, electric drivers, or other suitable drivers. Automotive vehicles commonly are provided with power-assist systems to facilitate the steering of the vehicle. Servo motors or other operator input sensitive devices are coupled with the steering linkage or the steerable wheels of the vehicle and are operated in response to rotation of the steering wheel shaft. Torque produced by electric motors is generally sensed external to the motor in the torque transmission path between the electric motor and the torsionally driven load. Most applications sense the angular deformation of the torquing shaft or the angular deformation of a torsionally complient element in the torque path to the load. Various types of transducers have been developed to measure the changes in a magnetic field adjacent a rotating shaft, to provide information regarding different shaft characteristics such as speed, torque and horsepower.
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