Measuring device for torque transmission between two shafts based on fiber grating and strain gauge technology

Abstract

The invention discloses a device for transferring and measuring torque between two shafts on the basis of a fiber bragg grating and strain gage technology. The device comprises a fiber bragg grating measurement module and a strain gauge measurement module, wherein the fiber bragg grating measurement module and a strain gauge measurement module are respectively independent and are independently used for measuring torque between two measurement shafts; before measurement, the fiber bragg grating measurement module and the strain gauge measurement module are independently subjected to calibrationprocessing; and after calibration processing, the measurement device is assembled between two shafts which need to be measured, in a measurement process, two groups of independent signals of the fiber bragg grating and the strain gage are obtained, and signal processing and analysis is carried out to obtain the torque transferred between two shafts which need to be measured. The measurement device has a simple structure, is easy in operation, can obtain the torque transferred between two shafts, can measure different pieces of torque of different measuring ranges, and is high in sensitivity and universality.

Description

technical field [0001] The invention belongs to the technical field of mechanical measurement, relates to rotating machinery, in particular to a torque transmission measuring device between two shafts based on fiber grating and strain gauge technology. Background technique [0002] Torque is an important parameter of rotating machinery. If the torque value of the mechanical parts to be tested can be accurately and conveniently measured, it will be of great significance for real-time monitoring of the operating status of the system and analysis of the performance of the system. [0003] Most of the existing technologies use strain gauges to measure the torque, mainly by measuring the deformation of the torsion bar to indirectly measure the torque value. The method is simple, but there are certain defects. If the input torque value exceeds the measurement range, it is easy to twist the torsion bar, resulting in the failure to complete the measurement; if the input torque value...

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Problems solved by technology

[0003] Most of the existing technologies use strain gauges to measure the torque, mainly by measuring the deformation of the torsion bar to indirectly measure the torque value. The method is simple, but there are certain defects.

If the input torque value exceeds the measurement range, it is easy to twist the torsion bar, resulting in the failure to complete the measurement; if the input torque value is too small, it is difficult to deform the torsion bar sensitively, thus affecting the sensitivity and accuracy of the torque measurement device

Therefore, it is difficult for the torsion bar in the torque measuring device in the prior art to meet the measurement of torque values ​​with large variations, resulting in poor versatility

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