SELF-CALIBRATION DETECTION DEVICE AND TEMPERATURE DEMODULATION METHOD ORIENTED TO FIBER RAMAN TEMPERATURE SENSING SYSTEM

Title:

SELF-CALIBRATION DETECTION DEVICE AND TEMPERATURE DEMODULATION METHOD ORIENTED TO FIBER RAMAN TEMPERATURE SENSING SYSTEM

Document Type and Number:

WIPO Patent Application WO/2020/010824

Kind Code:

A1

Abstract:

A self-calibration detection device and a temperature demodulation method oriented to a fiber Raman temperature sensing system, wherein the self-calibration detection device comprises a fiber Raman thermodetector, thermostatic baths (4, 6), a multi-mode sensing fiber, and a multi-mode reflector (8). The fiber Raman thermodetector comprises a pulsed laser (1). The output end of the pulsed laser (1) is connected to the input end of a WDM (2). Two output ends of the WDM (2) are respectively connected to the input ends of a first APD (9) and a second APD (11). The output end of the first APD (9) is connected to the input end of a first LNA (10). The output end of the second APD (11) is connected to the input end of a second LNA (12). The output ends of the first LNA (10) and the second LNA (12) are connected to the input end of a data acquisition card (13). The output end of the data acquisition card (13) is connected to the input end of a computer (14). The temperature demodulation method can solve the problems in an existing distributed fiber Raman temperature measuring system of low temperature measuring accuracy, lower temperature measurement stability and low temperature measurement efficiency caused by a temperature demodulation method.

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Inventors:

ZHANG MINGJIANG (CN)
LI JIAN (CN)
ZHANG JIANZHONG (CN)
QIAO LIJUN (CN)
YAN BAOQIANG (CN)
XU YANG (CN)
JIN BAOQUAN (CN)
WANG DONG (CN)
WANG YU (CN)
WANG YUNCAI (CN)

Application Number:

PCT/CN2019/000086

Publication Date:

January 16, 2020

Filing Date:

May 05, 2019

Export Citation:

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Assignee:

UNIV TAIYUAN TECHNOLOGY (CN)

International Classes:

G01K15/00; G01K11/324

Foreign References:

CN108458814A	2018-08-28
CN107843357A	2018-03-27
CN103364107A	2013-10-23
CN106404217A	2017-02-15
CN103217232A	2013-07-24
CN105043586A	2015-11-11
CN104344913A	2015-02-11
CN101819073A	2010-09-01
EP2944933A1	2015-11-18

Attorney, Agent or Firm:

TAIYUAN KEWEI PATENT OFFICE (GENERAL PARTNER) (CN)

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