Subway tunnel safety monitoring system and method based on optical fiber sensing

A safety monitoring system and optical fiber sensing technology, applied in earth-moving drilling, mining equipment, mining equipment, etc., can solve the problems of not being formally used and popularized, poor operational feasibility, and high cost, and achieve practical technical support, The effect of reliable technical support

Inactive Publication Date: 2015-12-09
上海复旦智能监控成套设备有限公司
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Problems solved by technology

However, due to problems such as high cost, poor operational feasibility, and effects, it has not yet been officially used and popularized.

Method used

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  • Subway tunnel safety monitoring system and method based on optical fiber sensing
  • Subway tunnel safety monitoring system and method based on optical fiber sensing

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Embodiment Construction

[0030] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0031] This example provides an optical fiber distributed subway tunnel safety monitoring technology for the engineering construction behavior that is destructive to the subway tunnel and endangers the safety of the subway operation. This technology uses a continuous optical fiber laid along the tunnel as the sensing element to detect the vibration transmitted by the tunnel. It is a distributed sensing technology, and every point on the continuous optical fiber has sensing capabilities; through the construction of optical fiber interference light path, And signal detection and analysis technology, real-time monitoring of the occurrence of behaviors that endanger subway safety, and locate the location of harmful behaviors.

[0032] Based on the a...

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Abstract

The invention discloses a subway tunnel safety monitoring system and method based on optical fiber sensing. According to the scheme, optical fibers serve as dual media of sensing and transmission, optical cables laid along a subway tunnel wall serve as inductors, mechanical construction, excavation and other behaviors transferred through the subway tunnel wall are sensed, signals are restored through demodulation devices, vibration information transferred by a stratum structure is obtained, and possible threat behaviors, caused by construction behaviors surrounding the tunnels, to tunnels are found out. According to the scheme, through the optical cables laid along the subway tunnel wall, a passive subway tunnel information transmission channel is built, and the behaviors possibly threatening the subway tunnel structure safety due to building construction surrounding the subway tunnels are monitored in real time; besides, passive arrangement is adopted along the tunnels, no power supply is needed, reliability is high, interference resistance is good, the system and method are easy to achieve, and normal subway operation is not affected at all.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a subway tunnel safety monitoring technology based on distributed optical fiber sensing technology. Background technique [0002] After more than ten years of development, China's subway construction has entered a very critical stage of connecting the past and the future. On the one hand, after more than ten years of high-speed construction, the subways in various cities in China have formed a huge and complex network with hundreds of lines and an operating mileage exceeding tens of thousands of kilometers. On the other hand, in the practice of subway construction and operation, a wealth of experience has been accumulated, but there are also some lessons and problems. In the next ten years, subways in various provinces and cities in China will continue to be constructed, and the difficulty and complexity of safety management in their operations will fur...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/18
Inventor 缪璇肖倩
Owner 上海复旦智能监控成套设备有限公司
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