Distributed optical fiber temperature measurement system and method for real-time monitoring of spatial temperature distribution of concrete dams

Abstract

A distributed optical fiber temperature measurement system for real-time monitoring of the spatial temperature distribution of concrete dams, a distributed optical fiber temperature measurement system for real-time monitoring of the spatial temperature distribution of concrete dams, including N-layer pouring silo layers buried in the concrete dam body along the river An optical fiber spiral loop-back layout structure composed of n loop-back distributed optical fibers in the inner loop, N=n and ≥ 1, a loop-back distributed optical fiber is buried in each layer of pouring warehouse blank layer, and adjacent loop-back distributed optical fibers are connected to each other to form Optical fiber spiral loop layout structure; the bottom loop distributed optical fiber is connected to the distributed optical fiber temperature measurement system, and each meter of optical fiber in each looped distributed optical fiber forms a temperature measurement point. The distributed optical fiber temperature measurement system and method for real-time monitoring of the spatial temperature distribution of concrete dams provided by the present invention can solve the problem of low accuracy of existing monitoring methods, small monitoring space area, and inability to target the uneven temperature characteristics and evolution rules of concrete in the pouring warehouse The problem of conducting observational studies.

Description

Technical field [0001] The invention relates to the technical field of concrete dam construction, in particular to a distributed optical fiber temperature measurement system and method for monitoring the spatial temperature distribution of concrete dams in real time. technical background [0002] Temperature control and crack prevention of concrete dam has always been the focus of dam construction safety and academic research. With the construction of a number of concrete dam projects in China, the research and practical application of the theory and method of temperature control and crack prevention of concrete dams are fruitful. The theory and practice show that accurately grasping the real temperature distribution and its variation law of the dam body is the basis for drawing up scientific and reasonable temperature control measures, and also the basis for analyzing the process of concrete temperature cracks. [0003] In the traditional construction process of concrete dams, o...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a distributed optical fiber temperature measurement system and method for real-time monitoring of the spatial temperature distribution of concrete dams, which can solve the problem of low accuracy of existing monitoring methods, small monitoring space area, and inability to target concrete temperature in the pouring warehouse. Observation and research on inhomogeneity characteristics and evolution law, high spatial temperature monitoring accuracy, large monitoring spatial area and long monitoring period; for the accurate realization of the three-dimensional temperature field reconstruction of the dam body and the correctness check of the spatial temperature difference algorithm Provide technical foundation and data support

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