Distributed optical fiber temperature measurement parameter automatic adjustment system and method

Abstract

The invention provides a distributed optical fiber temperature measurement parameter automatic adjustment system and method, and the system comprises a first temperature measurement device and a second temperature measurement device which are connected to an optical fiber temperature measurement system, and are respectively disposed at different positions of an optical fiber. The first temperature measuring device comprises a first circuit, a first heat preservation cavity and a first temperature measuring module located in the first heat preservation cavity and connected to the first circuit, the second temperature measuring device comprises a second circuit, a second heat preservation cavity and a second temperature measuring module located in the second heat preservation cavity and connected to the second circuit, and the first circuit is used for being in communication connection with an optical fiber temperature measuring system. The second circuit is used for communication connection with an optical fiber temperature measurement system. According to the scheme, parameters can be automatically adjusted at any time, the two temperature measuring devices with the heat preservation cavities are provided and directly arranged on the optical fiber in a sleeving mode in the using process, using is very convenient, winding is not needed, a thermostatic bath is not needed, and the system has the advantages of being convenient to use, high in practicability and the like.

Description

technical field [0001] The invention belongs to the technical field of temperature measurement based on distributed optical fibers, and in particular relates to a system and method for automatically adjusting temperature measurement parameters of distributed optical fibers. Background technique [0002] The working principle of the distributed optical fiber temperature sensor is based on the temperature characteristics of the optical fiber back Raman scattering. Since the temperature information of each point of the optical fiber is represented by Raman scattered light pulse signals with different amplitudes, according to the propagation speed of the light wave in the medium and using OTDR technology, the relative round-trip time of the anti-Stokes scattered light signal in the optical fiber is observed And the magnitude of the amplitude can accurately detect the instant temperature and its changes at all points of the optical fiber. The temperature measurement of the distri...

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Problems solved by technology

[0005] However, when the optical fiber is used for a certain period of time, the loss of the optical fiber will gradually increase, and the parameters need to be adjusted at this time; in addition, as the temperature changes, the change of the optical fiber loss will also increase. At this time , it is also necessary to adjust the parameters

At present, the method of manually adjusting parameters is adopted, but there are many inconveniences in manual modification, for example, it is not known when to adjust, and temperature changes often occur, so manual modification is very troublesome and time-consuming. It is very inconvenient to adjust the parameters in places where the environment is harsh or it is inconvenient to enter casually.

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