Distributed optical fiber sensing system and operation method of dam wetting line in complex environment

Abstract

The invention discloses a dam seepage line distributed type optical fiber sensing system under a complex environment and an operation method.The system comprises a loading end guide connection device, an inner frame body device, an output guide connection device and an outer matched body device, wherein the loading end guide connection device is connected with the inner frame body device through a first port table, the inner frame body device is connected with the output guide connection device through a second port table, and the inner frame body device is connected with the outer matched body device through a horizontal guide rod.According to the dam seepage line distributed type optical fiber sensing system under the complex environment and the operation method, a combined structure of the loading end guide connection device, the inner frame body device, the output guide connection device and the outer matched body device is used, so that in situ water contents of a to-be-tested dam in variable elevation directions are monitored; an empirical model between the temperature difference of sensing fibers in a sensing fiber output end, a sensing fiber input end and the inner frame body device and the in situ water contents is constructed, so that real-time sensing of the dam seepage line is realized, and the technical problem that dam seepage line monitoring is realized on dependence of a distributed type optical fiber sensing technology is well solved.

Description

technical field [0001] The invention relates to a distributed optical fiber sensing system and an operation method for a dam soaking line in a complex environment, belonging to a water engineering safety sensing system. Background technique [0002] The realization of real-time and efficient monitoring of the seepage behavior of water projects is of great significance to ensure its safe service. Especially for earth-rock dams, embankments and other earth-rock and granular structures, the seepage problem and its impact are more prominent, and it is especially necessary to strengthen the monitoring of seepage behavior. Efficient perception and timely discovery of security risks. As a new interdisciplinary technology, fiber optic sensing technology has attracted great attention in the field of hydraulic safety monitoring due to its good mechanical properties and low production costs. With the development of distributed optical fiber sensing technology, it has become an importa...

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Problems solved by technology

[0003] For the perception of dam infiltration line, the traditional technology generally has many shortcomings such as low precision, poor anti-electromagnetic interference ability, inability to realize distributed monitoring, short service life, large volume, many leads, and poor affinity.

For the relatively new optical fiber sensing technology, a mature distributed optical fiber sensing theory for soaking lines has not yet been established, and there is even a lack of necessary monitoring methods and technologies in terms of practical application and promotion. Starting from the environment, develop an infiltration line optical fiber sensing system and method that is simple in theory, strong in practicality, and convenient for long-term use

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