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Electronic system of distributed optical fiber temperature measuring system with large dynamic temperature measuring range and realization method thereof

A technology of distributed optical fiber and electronic system, applied in the field of distributed optical fiber temperature measurement, can solve the problems of insufficient dynamic range of signal conditioning circuit, difficult to meet actual requirements, front-end signal saturation, etc., to solve the problem of insufficient dynamic range of system temperature measurement , easy to use and promote, practical effect

Pending Publication Date: 2019-05-03
SHANGHAI BAIANTEK SENSING TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the detection temperature range (range) of the system becomes larger, for example, when the detection temperature range is -55°C~350°C, due to the large dynamic range, the dynamic range of the signal conditioning circuit is not enough, which will easily cause the front-end signal to be saturated and the back-end If the signal is still very weak, it is difficult to meet the actual requirements by using conventional electronic processing methods

Method used

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  • Electronic system of distributed optical fiber temperature measuring system with large dynamic temperature measuring range and realization method thereof
  • Electronic system of distributed optical fiber temperature measuring system with large dynamic temperature measuring range and realization method thereof
  • Electronic system of distributed optical fiber temperature measuring system with large dynamic temperature measuring range and realization method thereof

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Embodiment 1

[0037] see Figure 1~5, in an embodiment of the present invention, an electronic system of a distributed optical fiber temperature measurement system with a large dynamic temperature measurement range, including an optical signal module 1, a Stcoks photoelectric conversion module 21, an Anti-Stocks photoelectric conversion module 22, a first programmable gain Signal conditioning module 31, second program-controlled gain signal conditioning module 32, data acquisition and processing module 4 and industrial computer 5, described optical signal module 1 is connected with Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22 respectively, described Stcoks photoelectric conversion module 21, Anti-Stocks photoelectric conversion module 22 are respectively connected to one end of the first program-controlled gain signal conditioning module 31 and the second program-controlled gain signal conditioning module 32; the first program-controlled gain sign...

Embodiment 2

[0051] A method for realizing a distributed optical fiber temperature measurement system with a large dynamic temperature measurement range, comprising the following steps:

[0052] In the first step, the optical signal module 1 generates a laser pulse signal with a certain repetition rate, and receives the Stocks and Anti-Stocks Raman scattered light reflected from the laser pulse signal;

[0053] In the second step, the Stcoks photoelectric conversion module 21 and the Anti-Stocks photoelectric conversion module 22 complete photoelectric conversion and preliminary amplification, and output analog weak voltage signals;

[0054] In the third step, the first programmable gain signal conditioning module 31 and the second programmable gain signal conditioning module 32 respectively receive the weak voltage signals output from the Stcoks photoelectric conversion module 21 and the Anti-Stocks photoelectric conversion module 22, and complete signal amplification, output voltage sign...

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Abstract

The invention discloses an electronic system of a distributed optical fiber temperature measuring system with a large dynamic temperature measuring range and a realization method thereof in the technical field of distributed optical fiber temperature measuring. An optical signal module is connected with a stcoks photoelectric conversion module and an anti-Stocks photoelectric conversion module; the stcoks photoelectric conversion module and the anti-stocks photoelectric conversion module are respectively connected to one end of each of a first program-controlled gain signal conditioning moduleand a second program-controlled gain signal conditioning module; the other ends of the first program-controlled gain signal conditioning module and the second program-controlled gain signal conditioning module are connected with a data acquisition and processing module respectively; and the data acquisition and processing module is connected with an industrial computer. Because of the phenomenonof frequent signal saturation in high temperature measurement by the distributed optical fiber temperature measurement system in a large dynamic temperature measurement range, the invention employs asolution of program-controlled time-sharing gain adjustment, time-sharing collection, and curve segmentation synthesis, thereby effectively solving a problem of insufficient dynamic range of the system temperature measurement. Moreover, the electronic system having advantages of simple structure and high practicability is easy to apply and promote.

Description

technical field [0001] The invention relates to the technical field of distributed optical fiber temperature measurement, in particular to an electronic system of a distributed optical fiber temperature measurement system with a large dynamic temperature measurement range and an implementation method thereof. Background technique [0002] Distributed optical fiber temperature measurement system (hereinafter referred to as DTS system) is widely used in various fire monitoring sites, such as road tunnels, subway tunnels, power cable tunnels in power plants, petrochemical oil storage tanks and other sites. DTS system is a temperature measurement system developed based on the principle of optical time domain reflectometer (OTDR) and Raman scattering. Its temperature sensor is an optical fiber (usually made into an optical cable). The DTS system uses the Raman effect of optical fiber, that is, optical fiber The temperature field of the laying position (space) modulates the backwa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/324
Inventor 黄正钟少龙陈兵王新中
Owner SHANGHAI BAIANTEK SENSING TECH CO LTD