A displacement sensor based on a gear rotary-type fiber Bragg raster and an application method thereof

Abstract

The invention relates to a displacement sensor based on a gear rotary-type fiber Bragg raster and an application method thereof, and belongs to the technical field of photoelectron measurement. The displacement sensor of the invention comprises a fiber Bragg raster, a cantilever beam, a first gear, a second gear, a first tooth bar, a second tooth bar, a measurement contact head, a first rolling bearing, a second rolling bearing, a stepped shaft, a displacement space limiting sleeve pipe, a first tooth bar sleeve pipe, a second tooth bar sleeve pipe, a third tooth bar sleeve pipe, a first spring, a second spring, a metal box, an externally connected fiber, a bottom seat of the first rolling bearing and a bottom seat of the second rolling bearing, wherein the fiber Bragg raster, the cantilever beam, the first gear, the second gear, the first tooth bar, the second tooth bar, the first rolling bearing, the second rolling bearing, the stepped shaft, the first tooth bar sleeve pipe, the second tooth bar sleeve pipe, the third tooth bar sleeve pipe, the first spring, the second spring, the bottom seat of the first rolling bearing and the bottom seat of the second rolling bearing are packaged inside the bottom box. According to the displacement sensor based on the gear rotary-type fiber Bragg raster and the application method thereof of the invention, on-line monitoring of displacement is realized. At the same time, the structure is simple; the usage is convenient; the measuring range is large; the sensitivity is adjustable; and the anti-interference capability is strong.

Description

technical field [0001] The invention relates to a gear-rotating optical fiber Bragg grating displacement sensor and a using method thereof, which belong to the technical field of optoelectronic measurement. Background technique [0002] In recent years, accidents such as bridge collapses, tunnel collapses, and landslides along the way have occurred frequently in China. Timely and accurate grasp of crack changes and relative position slippage in civil structures makes displacement detection particularly important. At present, the existing fiber grating displacement sensors generally fix the fiber grating on various elastic beams, convert the displacement to the strain of the grating through the deformation of the beam (shrapnel), and measure the corresponding displacement by demodulating the wavelength drift of the grating. This kind of sensor has high precision, anti-electromagnetic interference, stable chemical properties and can meet distributed measurement. The disadvanta...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a gear-based optical fiber Bragg grating displacement sensor and its use method, which are used to solve the problems of on-line monitoring of displacement, being easily affected by electromagnetic interference, and low accuracy

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