Grating torque transducer

Abstract

Disclosed is a grating torsion sensor which comprises a shell and a foundation, wherein in the center of the shell is equipped with a horizontal rotary axle, of which two ends stand out the shell, one end is connected with a power source and the other end is connected with a load to be tested; the shell is fixed on the foundation, in which is equipped with an asynchronism motor and a sensing component, the rotor of the asynchronism motor is movably joint on the rotary; the sensing component includes two pairs of grating groups and two pairs of photoelectric transmitting receiving device; the grating groups near to the two sides of the shell and includes a pair of matched inner and outer grating slices, wherein the outer grating slice is fixed on the rotary, and the inner grating slice is at the inner side of the outer grating slice and fixed with the rotor of the asynchronism motor; the photoelectric transmitting receiving device includes a photoelectric transmitting tube and a photoelectric receiving tube, which are separated by the grating groups, and their leading-out ends are connected with a testing instrument.

Description

(1) Technical field [0001] The invention relates to a sensor, in particular to a grating torque sensor which collects signals through a grating. (2) Background technology [0002] At present, there are two main types of known and commonly used torque sensors: the first type is a (tooth) grid type torque sensor that obtains signals through magnetoelectric induction. The signals output by this type of sensor are two angular displacement signals with phase difference, and the torque information is obtained by combining the signals. Its disadvantage is that it is bulky and cannot measure static torque, but can only measure static torque and dynamic average torque. The second category is a torque sensor with a resistance strain gauge as a sensitive element. It installs four precision resistance strain gauges on the rotating shaft or the elastic shaft connected in series with the rotating shaft, and connects them into a Whiston bridge. The deformation of the shaft will cause th...

AI Technical Summary

Problems solved by technology

[0003] The invention overcomes the shortcomings of current torque sensors that cannot measure static torque and static (dynamic) torque at the same time, has low measurement accuracy and small overload capacity, and provides a torque sensor with high measurement accuracy, simple structure, and simultaneous measurement of static torque. and static (dynamic) torque torque sensor

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