Fiber Bragg Grating Inclinometer

Abstract

The invention provides a fiber grating inclinometer, belonging to the field of sensing technology, comprising a housing, and an elastic beam arranged in the housing, a first magnet, a second magnet, a fixing piece and a strain frame; There is a first fiber grating used to monitor the elongation of the elastic beam; the first magnet is located under the elastic beam, and is connected to the free end of the elastic beam through a rigid wire, and is suspended in the housing; the second magnet is sleeved outside the first magnet , cooperate with the first magnet gap and magnetically repel each other; the fixing piece is sleeved outside the second magnet and fixedly connected with the second magnet; the strain frame is provided with a second fiber grating for connecting with the side wall of the fixing piece, the second At least four of the second fiber gratings are arranged and evenly spaced around the fixing part, and at least four second fiber gratings are used to coordinately monitor the inclination direction of the first magnet. The optical fiber grating inclinometer provided by the invention realizes the synchronous measurement of the inclination angle and the inclination angle direction.

Description

technical field [0001] The invention belongs to the field of sensor technology, and more specifically relates to a fiber grating inclinometer. Background technique [0002] The monitoring of inclination and deformation information at different heights or depths along the vertical direction is very important in engineering fields such as high-rise buildings, deep pits, and high slopes. Through monitoring, their inclination, deformation and their changing trends can be grasped. Currently commonly used monitoring equipment are electrical inclinometers and mechanical inclinometers. However, the anti-interference ability of the electric inclinometer is poor, and the readings are unstable, and the staff must go to the slope site for each measurement, which is very inconvenient to carry out the work, and the reading results of different staff are prone to be different after subjective influence. And it cannot be monitored in real time. Ordinary mechanical inclinometers are diffic...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a fiber grating inclinometer, which aims to solve the technical problem that the existing fiber grating inclinometer sensor is difficult to be applied to the deformation monitoring of engineering structures due to the shortcomings of low precision, short life, and large volume.

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