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Full-scale optical fiber monitoring technology for multilayer medium of road structure

A technology of road structure and multi-layer medium, which is applied in the direction of roads, roads, liners embedded in the road surface, etc., to achieve long-term health monitoring, real-time monitoring, and feasible methods

Inactive Publication Date: 2011-09-07
DALIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a full-scale optical fiber monitoring technology based on the multi-layer medium of the road structure to solve the problem of full-scale monitoring of the multi-layer medium of the road structure

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  • Full-scale optical fiber monitoring technology for multilayer medium of road structure
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  • Full-scale optical fiber monitoring technology for multilayer medium of road structure

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Embodiment Construction

[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0018] The sensing system using the full-scale optical fiber monitoring technology of road structure multi-layer medium is shown in the attached figure 1 As shown, the optical sensing technology is used to carry out full-scale optical fiber monitoring on the multi-layer medium of the road structure, which mainly includes five parts: 1 distributed optical fiber demodulator, 2 off switch 3 fiber grating demodulator, 4 optical fiber grating and 5 distributed optical fibers etc. Among them, 4 fiber gratings are distributed in local positions of 5 distributed optical fibers, and the collinear sensing probes of the two are connected with 3 fiber grating demodulators and 1 distributed fiber demodulator through 2 optical switches.

[0019] The test method of the full-scale optical fiber monitoring technology based on the m...

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Abstract

The invention provides a full-scale optical fiber monitoring technology for a multilayer medium of a road structure and belongs to the technical field of intelligent structure health monitoring. The full-scale optical fiber monitoring technology is characterized in that a distributed optical fiber etched with fiber grating locally is arranged along the multilayer medium of a road structure in a full scale way at a radian with a bent radius not less than 2cm and is used as a sensing element for monitoring the multilayer medium of the road structure with local high precision and full-scale higher precision. The full-scale optical fiber monitoring technology has the advantages that the effects of local high-precision test and full-scale higher precision test can be achieved and the real-time monitoring and long-term health monitoring for the road structure can be realized. Besides, the monitoring technology has distinct thought, the method is feasible, and an integrated system is low in cost; and the monitoring technology is easily applied to the field of health monitoring for the road structure so that the road structure can be used more reasonably and efficiently.

Description

technical field [0001] The invention belongs to the technical field of structural intelligent health monitoring, and relates to a full-scale optical fiber monitoring technology for road structure multi-layer media. Background technique [0002] Roads are usually exposed in nature, and are not only affected by vehicle loads, but also directly affected by external environmental factors such as temperature, light, rain and snow. The rapid growth of traffic volume brought about by the development of domestic economy has caused many road structures to be damaged in different scales and degrees due to repeated overloading, long-term fatigue accumulation effects and environmental factors, which seriously affect the performance of road structures. Therefore, it is necessary to monitor the service state of the road structure in order to repair and maintain it in time. At present, the conventional detection technologies for road structures mainly include manual inspection technology,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24E01F11/00
Inventor 周智刘婉秋王花平何建平黄明华
Owner DALIAN UNIV OF TECH
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