Torque detection device, method and system based on shaft phase difference

Abstract

The invention provides a torque detection device based on the phase difference of a rotating shaft. The device comprises a tested shaft, laser measuring heads and ribbon straps. The ribbon straps arecomposed of first ribbon straps and second ribbon straps. The first ribbon straps and the second ribbon straps are oppositely arranged in the axial direction of the tested shaft. The laser measuring heads are in one-to-one correspondence with the ribbon straps. Light spots emitted by the laser measuring heads reach the corresponding ribbon straps. Stripes are arranged on the ribbon straps. The plurality of stripes comprise first stripes and second stripes. The first stripes and the second stripes are different in reflectivity. The first stripes and the second stripes are arranged in turn in the circumferential direction of the tested shaft. The invention further provides a detection system and a detection method for obtaining the torque value by adopting the torque detection device based on the phase difference of the rotating shaft. According to the invention, by adopting a zero-position identification and processing method during the torque measurement process of the rotating shaft based on phase difference measurement, the difficulty that the zero-position correction is difficult to realize in the static condition during the conventional pulse signal measurement process can be overcome.

Description

technical field [0001] The present invention relates to the technical field of torque measurement of rotating shafts, and in particular, to a torque detection device, method and system based on the phase difference of rotating shafts. Background technique [0002] Torque measurement and control play an increasingly important role in modern smart manufacturing and power equipment. Continuously improving the convenience, real-time and accuracy of torque measurement is the unremitting pursuit of torque measurement and monitoring. At present, the more mature shaft torque measurement methods mainly include strain type, magneto-elasticity and rotation angle type. Strain-type torque sensors are widely used in China because of their simple structure and low cost, but they need to solve problems such as signal transmission. The structure of the magneto-elastic sensor is relatively complex, and in order to obtain a certain accuracy, there are strict requirements on the corresponding...

AI Technical Summary

Problems solved by technology

The traditional measurement method can only measure the torque after the shaft system is rotated, and cannot test the static load

However, in some special occasions in practical applications, such as ship propeller shafts, underwater vehicles, etc., once the rotating shaft rotates, it will be loaded, and there is no initial state where the torque is zero, which makes the on-site installation and adjustment of the torque measurement system difficult. The calibration brings great inconvenience, which limits the practical engineering application of this measurement method

[0004] In addition, because the phase difference of the pulse signal caused by the torque deformation of the rotating shaft is extremely small in the actual situation, the initial phase difference during mechanical installation is often much larger than the phase difference change caused by the load, and it is difficult to accurately control, which limits the field installation of the torque measurement system. It is very inconvenient to adjust and adjust, which limits the practical engineering application of this measurement method

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