Brillouin distributed optical fiber sensing based structural joint monitoring device

A distributed optical fiber and monitoring device technology, which is applied in the field of structural joint expansion and contraction detection devices using optical fiber sensors, and structural joint monitoring devices based on Brillouin distributed optical fiber sensing, to achieve high social benefits and reduce detection and maintenance costs. Effect

Inactive Publication Date: 2015-01-28
无锡苏积传感科技有限公司
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing Brillouin distributed optical fiber sensing device can only perform one-way detection, and design a sensor based Structural Seam Monitoring Device Based on Brillouin Distributed Optical Fiber Sensing

Method used

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  • Brillouin distributed optical fiber sensing based structural joint monitoring device
  • Brillouin distributed optical fiber sensing based structural joint monitoring device
  • Brillouin distributed optical fiber sensing based structural joint monitoring device

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the drawings and embodiments.

[0029] Such as Figure 1-6 Shown.

[0030] A structural seam monitoring device based on Brillouin distributed optical fiber sensing, which includes steel plate bases 9 installed on both sides of the structural seams (should be made of stainless steel with good corrosion resistance, such as Image 6 As shown), a steel plate 5 and an L-shaped steel plate 8 are installed on the steel plate base 9 on each side, such as figure 1 , Two in-line steel sheets 5 (stainless steel sheets with a thickness of more than 1 cm can be used, such as Figure 4 ) Fix both sides of the tested seam respectively, and wind and fix the optical fiber through two pulleys on the steel sheet. When the seam is opened, the optical fiber is pulled. Two L-shaped steel sheets 8 (stainless steel sheets with a thickness of more than 1 cm can be used, such as Figure 5 Shown) Fix both sides of the teste...

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Abstract

A Brillouin distributed optical fiber sensing based structural joint monitoring device is characterized by comprising steel plate bases (9), a linear steel sheet (5) and an L-shaped steel sheet (8) are mounted on each steel plate base (9), a pulley (6) is mounted at each of a suspension arm end of each linear steel sheet (5) and a corner end of each L-shaped steel sheet (8), an optical fiber (1) for stretching detection is wound on the two corresponding pulleys (6) at the suspension arm ends of the linear steel sheets (5) on two sides of a structural joint, an optical fiber (2) for contracting detection is wound on the two corresponding pulleys (6) at the corner ends of the L-shaped steel sheets (8) on two sides of the structural joint, an optical fiber (3) for temperature compensation detection is connected between the optical fiber (1) for stretching detection and the optical fiber (2) for contracting detection, and each of the optical fiber (1) for stretching detection and the optical fiber (2) for contracting detection is connected with a Brillouin distributed optical fiber demodulating system through a respective connecting optical fiber (4). The Brillouin distributed optical fiber sensing based structural joint monitoring device is capable of monitoring the stretching quantity and the closing quantity of the structural joint, achieves temperature self compensation and effectively overcomes the shortcomings when the optical fibers are simply laid.

Description

Technical field [0001] The invention relates to an engineering detection technology, in particular to a device for detecting expansion and contraction of a structural seam by using an optical fiber sensor, in particular to a structural seam monitoring device based on Brillouin distributed optical fiber sensing. Background technique [0002] Structural joints are some artificial joints set at the connection of components in engineering structural facilities, such as bridge expansion joints and tunnel segment joints. At these structural joints, due to factors such as temperature and component deviation, the width of the joints will change, and when the limit value is reached, it can cause the failure of the connector, and even cause catastrophic accidents such as the falling beam of the bridge. Therefore, it is of great significance to implement long-term online monitoring of these structures. However, due to the staggering number of structural seams, it is generally difficult to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/14
Inventor 王登位
Owner 无锡苏积传感科技有限公司
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