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Distributed optical fiber temperature measuring system for monitoring spatial temperature distribution of concrete dams in real time and method thereof

A technology of distributed optical fiber and concrete dams, applied in thermometers, thermometers with physical/chemical changes, measuring devices, etc., can solve the problems of long monitoring period, large monitoring space area, and low precision, and achieve long monitoring period and monitoring The effect of large space area and high monitoring accuracy

Active Publication Date: 2019-08-06
CHINA THREE GORGES UNIV
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  • Abstract
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  • Claims
  • Application Information

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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

Method used

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  • Distributed optical fiber temperature measuring system for monitoring spatial temperature distribution of concrete dams in real time and method thereof
  • Distributed optical fiber temperature measuring system for monitoring spatial temperature distribution of concrete dams in real time and method thereof
  • Distributed optical fiber temperature measuring system for monitoring spatial temperature distribution of concrete dams in real time and method thereof

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Embodiment 1

[0030] Such as Figure 1-Figure 5 As shown, a distributed optical fiber temperature measurement system for real-time monitoring of the spatial temperature distribution of concrete dams includes an optical fiber spiral composed of n looped distributed optical fibers embedded in the N-layer pouring bin layer 3 of the concrete dam body along the river. Loopback layout structure 1, N=n and ≥ 1, a loopback distributed optical fiber 2 is buried in each layer of pouring bin layer 3, and adjacent loopback distributed optical fibers 2 are connected to each other to form an optical fiber spiral loopback layout structure 1;

[0031] The loopback distributed optical fiber 2 includes a first high-density monitoring optical fiber segment 2-1 and a second high-density monitoring optical fiber segment 2-3, a first high-density monitoring optical fiber segment 2-1 and a second The two ends of the high-density monitoring optical fiber section 2-3 are respectively connected to the optical fiber ...

Embodiment 2

[0038] A method for real-time monitoring of the spatial temperature distribution of a concrete dam by the above-mentioned distributed optical fiber system, the method comprising the following steps:

[0039] Step 1: In the preparation stage of burying construction, complete the tasks of cable management, cable preparation and coil bundling of double-strand bundled optical fibers in advance; at the same time, draw the spatial positioning dimension map of the key positioning points of the optical fiber buried line, and mark the fiber embedding of the key positioning points The corresponding position of the meter mark;

[0040] Step 2: When the concrete material of the pouring blank layer 3 of the first concrete dam body is about to completely cover the embedding area, prior to the laying task of the cooling water pipe, the double-strand bundled optical fiber is first buried to form the pouring blank layer of the first concrete dam body 3. Loop-back distributed optical fiber 2. E...

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Abstract

The invention relates to a distributed optical fiber temperature measuring system for monitoring spatial temperature distribution of concrete dams in real time. The system comprises a fiber spiralcirculating arrangement structure that is formed by n circulating distributed fibers buried in N pouring bin base layers of a concrete dam body along a river direction, wherein the N is equal to the n andis larger than or equal to 1. A circulating distributed optical fiber is embedded in each of the pouring bin base layers; and the adjacent circulating distributed optical fibers are connected mutually to form a fiber spiral circulating arrangement structure. The circulating distributed optical fiber arranged at the bottom is connected with the distributed optical fiber temperature measuring system; and each meter of fiber among the circulating distributed optical fibers forms on temperature measuring point. According to the distributed optical fiber temperature measuring system and a method thereof, problems that the existing monitoring method has low precision, the monitoring space area is small, and observation and study can not be performed based on the non-uniform temperature and evolution law of the concrete in the pouring bin can be solved.

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 a method thereof for real-time monitoring of the spatial temperature distribution of concrete dams. Background technique [0002] The temperature control and crack prevention of concrete dams has always been the focus of attention in the fields of dam construction safety and academic research. With the construction of a number of concrete dam projects in China, the research on the theory and method of temperature control and anti-cracking of concrete dams and the practical application of engineering have achieved fruitful results. Theory and practice show that accurately grasping the real temperature distribution and changing law of the dam body is the basis for formulating scientific and reasonable temperature control measures, and is also the basis for analyzing the process of concrete temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 梁志鹏周华维赵春菊刘全周宜红
Owner CHINA THREE GORGES UNIV
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