Fiber bragg grating based bridge safety monitoring structure

A fiber grating and safety monitoring technology, applied in bridges, bridge parts, bridge construction, etc., can solve problems such as inconvenience in bridge detection, and achieve the effect of facilitating monitoring and ensuring safety in use.

Pending Publication Date: 2020-07-28
深圳特发东部服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bridge safety monitoring structure based on fiber gratings, aiming to solve the problem of inconvenient bridge detection in the prior art

Method used

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  • Fiber bragg grating based bridge safety monitoring structure
  • Fiber bragg grating based bridge safety monitoring structure
  • Fiber bragg grating based bridge safety monitoring structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The bridge span 30 includes a main arch 31 and a plurality of suspenders 32 , the upper part of the suspender 32 is fixedly arranged with the main arch 31 , and the lower part of the suspender 32 is fixedly arranged with the bridge deck 20 , along the length direction of the main arch 31 . , a plurality of suspenders 32 are arranged sequentially at intervals; the suspenders 32 are provided with a second acceleration sensor 60, and the second acceleration sensor is arranged in signal connection with the server; in bridges, the suspenders 32 are also prone to stress changes, and through the first The second acceleration sensor realizes the monitoring of the boom 32 and improves the safety of the bridge.

[0033] The boom 32 has an inner wall 34, and the inner wall 34 of the boom 32 is provided with two fixed columns 33 arranged in a corresponding manner. The two ends of the second acceleration sensor 60 are fixed on the fixed columns 33 respectively. The detection part is...

Embodiment 2

[0042] The bridge deck 20 includes a plurality of girders 22, a plurality of connecting rods 29, and panel bodies 21. The panel bodies 21 are arranged in a flat manner. Along the length direction of the panel body 21, each girder 22 is arranged in sequence at intervals. The top of the main beam 22 is in a fixed arrangement with the panel body 21, the bottom of the main girder 22 is in a fixed arrangement with the pier 10, the two ends of the connecting rod 29 are respectively docked and fixed to the adjacent main girder 22, and the lower part of the boom 32 is in a fixed arrangement with the main girder 22; The main girder 22 is provided with a third acceleration sensor; in bridges, the main girder 22 is also prone to stress changes, and the third acceleration sensor is used to monitor the main girder 22 to ensure the safety of the main girder 22 .

[0043] The main girder 22 is equipped with a fiber grating stress-strain sensor 40, and the third acceleration sensor is replaced...

Embodiment 3

[0055] The bridge safety monitoring structure based on fiber gratings includes a data collector, a fiber grating stress strain sensor 40, a fiber grating temperature sensor, a first acceleration sensor 50, a second acceleration sensor 60, a third acceleration sensor, a fourth acceleration sensor 27 and a fifth acceleration sensor. Acceleration sensors 28 are respectively connected to the data collector; the data collector and the server are connected by wireless signals; the data collector is installed on the bridge to facilitate data collection, ensure the accuracy and timeliness of collection, and facilitate data Centralized processing before transmission to the server.

[0056] The bridge span 30 is provided with a wind speed and direction sensor 70, which is arranged in a wireless signal connection with the server; through the wind speed and direction sensor 70, the measurement of wind speed and wind direction is realized, and the output measurement data is transmitted to t...

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Abstract

The invention relates to the technical field of bridge safety monitoring, and discloses a fiber bragg grating based bridge safety monitoring structure, which comprises piers, a bridge deck and bridgespans, and is characterized in that the piers are used for supporting the bridge deck and the bridge spans; the bridge piers are in butt joint with the bridge spans to form skewback parts, fiber bragggrating strain sensors and fiber bragg grating temperature sensors are arranged at the skewback parts, and first acceleration sensors are arranged on the bridge deck; and the fiber bragg grating stress-strain sensor, the fiber bragg grating temperature sensors and the first acceleration sensors are in signal connection with a server. According to the bridge deck vibration, the first accelerationsensor outputs a voltage signal in direct proportion to the vibration quantity and transmits the voltage signal to the server to monitor the bridge deck; through the fiber bragg grating strain sensorsand the fiber bragg grating temperature sensors, once stress changes occur to the skewback part, the corresponding fiber bragg grating strain sensor transmits signals to the server, remote monitoringis achieved, great convenience is brought to monitoring of a bridge, and the use safety of the bridge is guaranteed.

Description

technical field [0001] The patent of the present invention relates to the technical field of bridge safety monitoring, specifically, to a bridge safety monitoring structure based on fiber gratings. Background technique [0002] Bridges generally refer to structures erected on rivers, lakes and seas to allow vehicles and pedestrians to pass smoothly. [0003] At present, bridges are divided according to their stress characteristics, including girder bridges, arch bridges, rigid frame bridges, suspension bridges, composite system bridges (cable-stayed bridges), etc. [0004] If closed traffic is used to detect and maintain the arch bridge, it is neither realistic nor economical; therefore, in the prior art, the arch bridge is lacking in monitoring, and the use safety of the arch bridge cannot be guaranteed. Contents of the invention [0005] The purpose of the present invention is to provide a bridge safety monitoring structure based on fiber gratings, aiming to solve the p...

Claims

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Application Information

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IPC IPC(8): E01D19/00E01D19/02E01D19/12E01D19/16G01B11/16G01K11/32G01L1/24G01P5/00G01P13/02G01K11/3206
CPCE01D19/00E01D19/02E01D19/125E01D19/16G01L1/242G01B11/16G01K11/32G01P5/00G01P13/02
Inventor 刘良古前彬李嘉桐
Owner 深圳特发东部服务有限公司
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