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Wide range fiber grating displacement sensor capable of adjusting measuring range and precision

A technology of displacement sensor and optical fiber grating, which is applied in the direction of instruments, measuring devices, optical devices, etc., can solve the problems of small measuring range of optical fiber grating displacement sensor, unable to change the measuring range and precision, etc., and achieve the solution of small measuring range, high precision, The effect of stable performance

Inactive Publication Date: 2016-08-10
SHENYANG JIANZHU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is proposed in response to the above problems, and the purpose is to provide a large-range fiber grating displacement sensor with adjustable range and precision that solves the problem that the existing fiber grating displacement sensor has a small measurement range and cannot change the range and accuracy, and achieves a simple structure. , stable performance, reliable, high precision, suitable for the purpose of health monitoring of various engineering structures

Method used

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  • Wide range fiber grating displacement sensor capable of adjusting measuring range and precision
  • Wide range fiber grating displacement sensor capable of adjusting measuring range and precision
  • Wide range fiber grating displacement sensor capable of adjusting measuring range and precision

Examples

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Effect test

Embodiment 1

[0020] figure 1 , 2 A large-range fiber grating displacement sensor with adjustable range and precision is shown, including: fiber grating, gear, rack and rectangular outer shell, and the fitting position of the inner wall of the outer shell 1 made of stainless steel plate is fixedly connected with Bracket plate 3, the middle part of the free end of the bracket plate 3 is provided with a groove, and the top of the groove is provided with a sleeve for fitting the rotating shaft 10, and the eccentric point A of the gear 4 passes through the middle part of the rotating shaft 10 and is connected as a whole. 4 The lower end meshes with the rack 7 fixed on the lower pole 8 of the outer shell 1. The width of the rack 7 is greater than the width of the gear 4. One end of the rack 7 is fixedly connected with the measuring rod 6. The cross section of the rack 7 is larger than the measuring rod 6, the measuring rod passes through and protrudes out of the adjacent outer shell 1 side wall...

Embodiment 2

[0022] figure 1 , 2 A large-range fiber grating displacement sensor with adjustable range and precision is shown, comprising: a fiber grating, a spring, and a rectangular outer shell, and a support plate 3 is fixedly connected to the fitting position of the inner side wall of the outer shell 1, and the support plate 3 The middle part of the free end is provided with a groove, and the top of the groove is provided with a sleeve for fitting the rotating shaft 10. The eccentric point of the gear 4 passes through the middle part of the rotating shaft 10 and is connected as one. The lower end of the gear 4 is fixed on the lower part of the outer casing 1 The rack 7 on the pole 8 is engaged, and one end of the rack 7 is fixedly connected with the measuring rod 6, and the measuring rod passes through and extends out of the side wall of the adjacent housing 1 to contact the measured object 5. The rack 7 The other end of the fiber grating (2) is symmetrically arranged on the upper and...

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Abstract

The invention discloses a wide range fiber grating displacement sensor capable of adjusting a measuring range and precision, comprising fiber gratings, a spring and a rectangle housing; the adaptive position on the inner wall of the housing is fixedly connected to a support plate; the middle portion of the free end of the support plate is provided with a groove; the top end of the groove is provided with a sleeve sleeving a rotation shaft; an eccentric point of a gear passes through the middle portion of a rotation shaft and is integrated with the rotation shaft; the lower end of the gear is meshed with a spline fixed on a support rod on the lower part of the housing; one end of the spline is fixedly connected to the measurement rod; the measurement rod passes through and is projected out of the side wall of the adjacent housing and is in contact with a measured structure; the other end of the spline is connected to the side wall of the housing of the other end through a spring which is fixedly connected in parallel; and the two fiber gratings are symmetrically arranged on the upper surface and the lower surface of the support plate. The wide range fiber grating displacement sensor solves the problem that the current fiber grating displacement sensor is small in the measuring range, and is simple in operation, stable in performance, reliable, and high in accuracy and is the first choice for health monitoring of various construction structures.

Description

technical field [0001] The invention relates to a sensor, in particular to a large-range optical fiber grating displacement sensor with adjustable measuring range and precision, and belongs to the technical field of optical fiber sensing. Background technique [0002] The sensor with fiber grating as the basic test unit has many advantages such as small size, light weight, corrosion resistance, anti-electromagnetic interference, etc., and has been widely used in the health monitoring of engineering structures. Among them, the application and research of fiber grating sensing technology are the most in the two aspects of strain and temperature, while the research and application of displacement monitoring are relatively few. Most of the fiber grating displacement sensors are designed based on the cantilever beam structure. The structure is to paste the fiber grating on the surface of the cantilever beam. Causes the shift of the reflection wavelength of the fiber grating. Th...

Claims

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Application Information

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IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 孙丽夏阳刘海成康奎久
Owner SHENYANG JIANZHU UNIVERSITY
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