Nuclear power plant equipment monitoring system based on optical fiber Bragg grating sensing

Abstract

A nuclear power plant equipment monitoring system based on optical fiber Bragg grating sensing comprises a light source, optical fiber Bragg gratings and copper / carbon coating optical fiber, wherein the optical fiber Bragg gratings are written on the copper / carbon coating optical fiber at intervals, or the optical fiber Bragg gratings are connected with the copper / carbon coating optical fiber, and the optical fiber Bragg gratings are attached on the surfaces of devices of pipelines, high-temperature and high-pressure containers and the like in a nuclear power plant and connected with an optical circulator through communication optical fiber. Light emitted from the light source is transmitted to the nuclear power plant through the optical circulator and the communication optical fiber, the light reflected by the optical fiber Bragg gratings reaches a photoelectric detector through the optical circulator and processed, then strain size generated by the optical fiber Bragg gratings can be confirmed, and accordingly the health conditions of nuclear power plant equipment are mastered. According to the nuclear power plant equipment monitoring system based on optical fiber Bragg grating sensing, wavelength division multiplexing or time division multiplexing can be adopted as the multiplexing mode, a distributed optical fiber Bragg grating sensor array is established, and the healthy monitoring of high-temperature and high-pressure equipment of the nuclear power plant is achieved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber grating sensing, and relates to a nuclear power plant equipment monitoring system based on optical fiber grating sensing. Background technique [0002] According to the prediction of the economic construction and social development situation of various countries in the world, due to the lack of energy resources and environmental protection requirements, nuclear energy, as a kind of clean energy, has the outstanding advantages of being beneficial to environmental protection, and avoids the cost of tens of millions of tons of fossil fuel power generation. Greenhouse gas emissions, the nuclear energy industry will continue to develop. Nuclear power generation uses the heat energy released by nuclear fission in nuclear reactors to generate electricity. Its power generation method is very similar to thermal power generation, except that nuclear reactors and steam generators are used to replace th...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a nuclear power plant equipment monitoring system based on fiber grating sensing, which solves the problem that the existing technology cannot monitor nuclear power plant equipment

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