High-resolution driving shaft torque sensing system based on moire fringe principle

Abstract

The invention discloses a high-resolution driving shaft torque sensing system based on a moire fringe principle, and relates to the technical field of sensing. The high-resolution driving shaft torque sensing system based on the moire fringe principle comprises a first shaft sleeve, a fixed supporting rod, a circular ring plate, a second shaft sleeve, an optical signal transmitting and receiving module and a signal processing module. According to the high-resolution driving shaft torque sensing system provided by the invention, high-resolution real-time monitoring on the output torque of an engine can be realized, the running state of the engine or a motor can be fed back in time, and the running state in which a fault possibly exists can be detected, so that the safety performance is improved; the high-resolution driving shaft torque sensing system has the advantages that the torque of a driving shaft is monitored by using only one set of moire fringe grating pair, the system is low in mounting difficulty, easy to integrate, high in monitoring resolution and small in time delay, and meanwhile, the system further has the function of monitoring environment temperature and noise; and the system is accurate in monitoring, is not liable to be interfered, and is especially suitable for unmanned control and remote measurement control times.

Description

technical field [0001] The invention relates to the field of sensing technology, in particular to a high-resolution drive shaft torque sensing system based on the Moiré fringe principle. Background technique [0002] In the field of automotive sensing, automotive torque sensing is an important application. When the car engine outputs different torques to the drive shaft of the car to change the motion state of the car, the drive shaft of the car will have a slight deformation due to inertia. The torque sensor can detect the torque of the drive shaft and can feedback the car engine in time. The running state detects possible faults, thus improving the safety performance of the car when it is in motion. [0003] In an existing contact strain sensor used in automotive torque sensing, special torsion strain gauges are pasted on the measured elastic shaft with strain glue, and a strain bridge is formed according to a certain arrangement. When the drive shaft is subjected to tor...

AI Technical Summary

Problems solved by technology

In this solution, the laser emitting end of each group and the moiré fringe detector are at different ends of the grating disk and cannot be integrated into the same module. The synchronization requirements for the two groups of moiré fringe sensors are also very high, including signal acquisition and processing. Synchronization and the accuracy of sensor installation, etc.; in addition, there is a certain time delay in the transmission of electrical signals

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