Fiber grating torque sensor with fork-shaped conjugate structure and mounting method thereof

Abstract

The invention relates to a fiber grating torque sensor with a fork-shaped conjugate structure, which is characterized in that the device comprises two double-gate sensor elastic sheets with fiber gratings on the surfaces, two fixed snap rings for fixing to the measured shaft and two fixed substrates respectively oppositely arranged on the two fixed snap rings, two trident induction substrates which are combined in an antisymmetric staggered way are respectively arranged at the matching ends of the two fixed substrates, two sensor elastic sheets are respectively arranged on the upper surface and the lower surface of the combination of the two trident induction substrates, the trident induction substrate comprises a middle induction branch arranged on the side wall of one side opposite to the two fixed substrates and side induction branches symmetrically arranged on the left and right sides of the middle induction branch. The fiber grating torque sensor with the fork-shaped conjugate structure is strong in corrosion resistance, long in service life and high in reliability in severe environments.

Description

technical field [0001] The invention relates to a fiber grating torque sensor with a fork-type conjugate structure and an installation method thereof. Background technique [0002] Long-term monitoring of the dynamic parameters of ships, underwater vehicles, submersibles, offshore drilling platforms and other equipment has important safety significance and economic value, and accurate measurement of the torque of the power shaft system of these equipment is one of its key technologies , the snap ring torque measuring instrument is a more commonly used technical means. The torque sensor used on this type of torque measuring instrument is a traditional resistive sensor. However, the power shaft system of these devices often works in an underwater wet environment and is subject to The environment is corrosive, and the reliability of traditional electrical sensors has great limitations in such environments. Fiber Bragg grating sensors have unique advantages such as anti-electrom...

AI Technical Summary

Problems solved by technology

[0002] Long-term monitoring of the dynamic parameters of ships, underwater vehicles, submersibles, offshore drilling platforms and other equipment has important safety significance and economic value, and accurate measurement of the torque of the power shaft system of these equipment is one of its key technologies , the snap ring torque measuring instrument is a more commonly used technical means. The torque sensor used on this type of torque measuring instrument is a traditional resistive sensor. However, the power shaft system of these devices often works in an underwater wet environment and is subject to The environment is corrosive, and the reliability of traditional electrical sensors has great limitations in such environments. Fiber Bragg grating sensors have unique advantages such as anti-electromagnetic interference, strong corrosion resistance, and easy to build large-scale sensor networks. Torque measurement in harsh environments, especially in high humidity environments, provides a new technical approach, and it is of great significance to develop torque sensors based on optical fiber gratings for snap ring torque measuring instruments

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