Fiber grating dislocation gauge with wedge-shaped structure

A fiber grating and wedge-shaped technology, which is used in measuring devices, instruments, surveying and mapping, and navigation, etc., can solve the problems affecting the normal supply of electricity, gas heating, etc., the settlement deformation of underground comprehensive pipe gallery, engineering pipeline deformation, etc., and achieve monitoring results. Real and reliable, fast response, good stability

Pending Publication Date: 2017-05-31
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development and utilization of the surrounding plots, especially the excavation of deep and large foundation pits and the large-scale drop of underground confined water, settlement and deformation of the completed underground comprehensive pipe gallery will occur.

Method used

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  • Fiber grating dislocation gauge with wedge-shaped structure
  • Fiber grating dislocation gauge with wedge-shaped structure
  • Fiber grating dislocation gauge with wedge-shaped structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with specific examples, but the protection scope of the present invention is not limited by the specific examples.

[0027] Figure 1-6 shown. A wedge-shaped fiber grating dislocation meter, including a sliding head 1, a cantilever beam 2, a sensing fiber grating 3, a compensation fiber grating 4, a transmission rod 5, a limit plate 6, a bolt 7, a wedge block 9, a spring 8, Protective shell 10 and fixed sheet 11;

[0028] The protective shell 10 is a rectangular box, and the side wall is provided with a narrow and long movable seam for the sliding head 1 to protrude, and the side of the protective shell 10 corresponding to the movable seam is fixed with a wedge-shaped block 8;

[0029] The end of the sliding head 1 is a U-shaped plate structure, and the U-shaped plate is clamped on the wedge-shaped block 8; two cantilever beams 2 are fixed on the U-shaped plate through bolts; the movable en...

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PUM

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Abstract

The invention discloses a fiber grating dislocation gauge with a wedge-shaped structure. The fiber grating dislocation gauge comprises a sliding head, rectangular-section overhanging beams, a fiber grating, a driving rod, a limiting plate, a spring, a wedge block, a protective shell and a sliding conduction arm; a sensing part is formed by the sliding head, the overhanging beams, the fiber grating, the driving rod, the spring, the wedge block, and the like; a conduction part is formed by a fixed rod and a sliding rod; the mechanism of the dislocation gauge is as follows: free ends of the overhanging beams are enabled to slide along an inclined plane of the wedge block by means of the sliding of the sliding head, so that the differential settlement is converted into the deflection at the free ends of the overhanging beams, and the Bragg reflection wavelength of the sensing fiber grating, which is stuck at the position close to fixed ends of the overhanging beams, is further changed; furthermore, the problem of cross sensitivity of the fiber grating is solved by using a reference grating method. The fiber grating dislocation gauge provided by the invention is high in measurement accuracy, adjustable, high in environmental adaptability and good in stability, and has a temperature self-compensating function and anti-electromagnetic interference performance, thus having better engineering application prospect.

Description

technical field [0001] The invention is based on optical fiber grating technology, and is a sensor for real-time monitoring of the relative settlement of structures on both sides of an underground pipe gallery settlement joint, belonging to the technical field of optical fiber sensing. Background technique [0002] The urban underground comprehensive utility corridor is an urban underground comprehensive utility corridor network planned and constructed prior to the development of the surrounding land, which solves the problem of energy demand in the development and operation of the surrounding areas. With the development and utilization of the surrounding plots, especially the excavation of deep and large foundation pits and the large-scale drop of underground confined water, settlement and deformation of the completed underground comprehensive pipe gallery will occur. If the relative settlement on both sides of the settlement joint is too large, It can lead to deformation a...

Claims

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Application Information

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IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 孙丽徐自强张春巍李闯朱春阳
Owner SHENYANG JIANZHU UNIVERSITY
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