Fiber bragg grating clinometer

Abstract

The invention provides a fiber bragg grating clinometer, and belongs to the field of sensing technology. The fiber bragg grating clinometer comprises a shell, and an elastic beam, a force amplification component, a first magnet and a second magnet, which are disposed in the shell; the elastic beam is located at the upper part of the shell and is placed horizontally, one end of the elastic beam isconnected to an inner wall of the shell, and the other end of the elastic beam is a free end; a fiber bragg grating for monitoring the elongation of the elastic beam is attached to the elastic beam; the force amplification component is located below the elastic beam; the first magnet is located below the first magnet and is connected with the free end of the elastic beam through a rigid wire bypassing the force amplification component; the second magnet is arranged at the outside of the first magnet in a sleeving manner and is in clearance fit with the first magnet; and the second magnet is fixedly arranged in the shell and is magnetically repulsive with the first magnet. The fiber bragg grating clinometer provided by the invention has high measurement accuracy, a large measurement range,a simple structure and convenient use, and is of great significance for the structural deformation monitoring of civil engineering.

Description

technical field [0001] The invention belongs to the technical field of sensing, and more specifically relates to a fiber grating inclinometer. Background technique [0002] The measurement of soil inclination is one of the important indicators of engineering monitoring and engineering safety and stability, so inclinometers are widely used in in-situ monitoring of geotechnical engineering, especially in slopes, roadbeds, soil dams and underground caverns. Chamber deep lateral displacement monitoring. Most of the traditional inclinometer sensors are electronic component sensors, which inevitably bring the shortcomings of being susceptible to electromagnetic radiation interference and poor long-term stability, and cannot meet the needs of use in harsh working environments such as strong electromagnetic radiation. [0003] Fiber Bragg Grating is a kind of strain sensing element with excellent performance. It has the advantages of high sensitivity, small size, corrosion resistan...

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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