Non-contact dynamic measurement system for torque of rotating shaft based on optical fibers

Abstract

The invention relates to a non-contact dynamic measurement system for the torque of a rotating shaft based on optical fibers. Stripe color codes are arranged on a measured shaft at intervals, and fiber probes are additionally mounted above the stripe color codes and firmly fixed onto a connecting component. When the measured shaft rotates, the spline rotating shaft correspondingly has angular deformation under different loads along with rotation of the measured shaft under different working conditions, the stripe color codes on the spline rotating shaft have phase difference by means of angular deformation, the phase difference measured by each group of optical fibers corresponds to the measured torque of the measured spline rotating shaft, and the phase difference is measured by the optical fibers so that accurate torque variation data of the spline rotating shaft can be obtained. The torque of the rotating shaft is measured in a non-contact dynamic online manner, the rotating shaft is not provided with an accessory mechanical part, the geometric dimensions of the laser fiber probes can meet the requirements of testing environments, and the non-contact dynamic measurement system has the advantages of simple structure, ingenious design and fine stability.

Description

technical field [0001] The invention relates to a measuring device, in particular to a non-contact dynamic measuring system of the torque of a rotating shaft based on an optical fiber. Background technique [0002] At present, there are mainly two types of non-contact measurement systems for rotating shaft torque: 1. The method of pasting resistance strain gauges on the shaft to design the measurement system, this method must add a strain gauge system and pasting equipment to the rotating shaft. It is obviously not suitable for the measured object that does not change the shafting layout and online measurement requirements; 2. The magnetoelectric phase difference measurement system with two pairs of gears is attached to the shaft, because the and layout of the shafting and the on-axis are also changed. It is also not suitable for the measured object with the requirements of not changing the shafting layout and online measurement. SUMMARY OF THE INVENTION [0003] Aiming a...

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Problems solved by technology

[0002] At present, there are mainly two types of non-contact torque measurement systems for rotating shafts: 1. The measurement system is designed by pasting resistance strain gauges on the shaft. This method must add a strain gauge system and pasting equipment on the rotating shaft. It is obviously inappropriate to measure the object without changing the shaft system layout and online measurement requirements; It is also inappropriate for the measured object that does not change the shafting layout and requires online measurement.

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