Displacement sensor and displacement monitoring device based on fiber grating sensing

Abstract

This application relates to a displacement sensor and a displacement monitoring device based on fiber grating sensing, including a housing, a rotating shaft, a push rod, a guiding mechanism, and a rotating assembly. There are two equal-strength beams inside the housing, and strain gratings are arranged on each of the equal-intensity beams. The two strain gratings are connected in series through optical fibers and connected to the fiber grating demodulator; the rotating shaft is installed on the casing and connected to the casing in rotation, and the rotating shaft is vertically connected to the sleeve rod; the rotating shaft is provided with a gear; the push rod is provided with a rack, The rack is meshed with the gear, and the two ends of the push rod are respectively in contact with the free ends of the two equal-strength beams; the guide mechanism is connected with the push rod, and is used to guide the push rod from the side wall of the housing toward the direction perpendicular to the axial direction of the rotation axis. The other side wall moves linearly; one end of the rotating assembly is used for fixed installation and can rotate around this end; the other end is movably inserted into the sleeve rod and used to drive the rotating shaft to rotate around its own axis so that the gear drives the push rod to reciprocate sports. This application has the advantage of long-term reliability and stability.

Description

technical field [0001] The present application relates to the field of sensor technology, in particular to a displacement sensor and a displacement monitoring device based on fiber grating sensing. Background technique [0002] The bridge will have a certain displacement when it is affected by factors such as the upper traffic load, temperature effect, and structural self-weight. During the long-term use of the bridge, the bridge displacement caused by external forces is the most serious. For example, the beam body is subjected to extreme loads (such as a large number of heavy vehicles traveling with eccentric loads), the beam body displacement caused by vehicle braking force, centrifugal force, etc. will directly lead to the bridge limit. The damage of the device, the damage of the beam body block and the displacement of the beam body seriously affect the operation safety of the bridge, and even bridge collapse accidents may occur. [0003] The degree of bridge displacemen...

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present application provides a displacement sensor and a displacement monitoring device based on fiber grating sensing to solve the shortcomings of poor long-term reliability and stability in the related art

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