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Bridge vertical displacement real-time monitoring device and method based on fiber grating displacement meter

A fiber grating, vertical displacement technology, applied in measuring devices, optical devices, instruments, etc., can solve the problems of low safety factor, high cost, difficult measurement, etc., and achieve the effects of low cost, improved accuracy, and convenient use.

Pending Publication Date: 2022-01-28
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the bridge spans water bodies or roads, the vertical displacement detection of the bridge cannot be directly measured by erecting a laser displacement meter directly under the monitoring point. It is necessary to build a platform or install a transverse beam to fix the laser displacement meter. This method greatly increases the cost, and When the bridge is under the road, there is also the risk of falling and collision due to the height limit, and the safety factor is extremely low, so it is usually difficult to establish a fixed reference point. Vertical displacement is still the most difficult to measure in long-term real-time monitoring one of the parameters

Method used

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  • Bridge vertical displacement real-time monitoring device and method based on fiber grating displacement meter
  • Bridge vertical displacement real-time monitoring device and method based on fiber grating displacement meter
  • Bridge vertical displacement real-time monitoring device and method based on fiber grating displacement meter

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0044] refer to figure 1 As shown, an embodiment of the bridge vertical displacement real-time monitoring device based on the fiber grating displacement meter of the present invention includes a backguy 1 and a fiber grating displacement meter 2, one end of the backguy is fixed on the measuring point A at the bottom of the bridge, and the other end of the backguy is connected to The detection end of the fiber grating displacement meter is fixed, the fiber grating displacement meter is installed on the angle block 3, the angle block is fixed on the vertical support part 4 of the bridge, and the fiber grating displacement meter is connected to the fiber grating demodulator 5 through ...

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Abstract

The invention discloses a bridge vertical displacement real-time monitoring device based on a fiber grating displacement meter. The device comprises a stay wire and a fiber grating displacement meter, wherein one end of the stay wire is fixed on a measuring point at the bottom of a bridge, the other end of the stay wire is fixed with the detection end of the fiber grating displacement meter, the fiber grating displacement meter is installed on an angle cushion block, the angle cushion block is fixed on the vertical supporting part of the bridge, the fiber grating displacement meter is connected with a fiber grating demodulator through a jumper wire, and the fiber grating demodulator collects data and enables the data to be collected by a computer. The invention also discloses a detection method, which comprises the following steps: carrying out calibration and temperature compensation on a fiber grating displacement meter, fitting the mounting angle and vertical displacement data measured by the fiber grating displacement meter under a simulation condition, obtaining a ratio of vertical displacement to oblique displacement according to a fitting result, and calculating vertical displacement data according to the ratio. According to the invention, the device is convenient and fast to install, controllable in cost and high in safety coefficient, and meets the detection requirements.

Description

technical field [0001] The invention relates to the field of health monitoring of small and medium bridges, in particular to a real-time monitoring device and method for bridge vertical displacement based on an optical fiber grating displacement meter. Background technique [0002] The vertical displacement of the bridge is the most useful, the most intuitive, and the most convenient to observe the main monitoring index, which is closely related to the actual state of the bridge. One of the most important indicators, it not only reflects the overall stiffness of the bridge in the vertical direction, but also reflects the bearing capacity of the bridge. Many applications. [0003] Since the bridge spans water bodies or roads, the vertical displacement detection of the bridge cannot be directly measured by erecting a laser displacement meter directly under the monitoring point. It is necessary to build a platform or install a transverse beam to fix the laser displacement mete...

Claims

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Application Information

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IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 李胜利梁真真郭攀毋光明王希东徐斌李攀杰郑鹏飞崔灿李金珂姜楠
Owner ZHENGZHOU UNIV
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