公开(公告)号：US11927491B2

公开(公告)日：2024-03-12

申请号：US17252992

申请日：2019-05-05

Applicant: TAIYUAN UNIVERSITY OF TECHNOLOGY

Inventor： Mingjiang Zhang ,  Jian Li ,  Jianzhong Zhang ,  Lijun Qiao ,  Baoqiang Yan ,  Yang Xu ,  Baoquan Jin ,  Dong Wang ,  Yu Wang ,  Yuncai Wang

IPC: G01K15/00 ,  G01K11/324

CPC classification number: G01K15/005 ,  G01K11/324 ,  G01K15/007

Abstract: A self-calibration detection device and a temperature demodulation method oriented to a fiber Raman temperature sensing system. The self-calibration detection device comprises a fiber Raman thermodetector, thermostatic baths, a multi-mode sensing fiber, and a multi-mode reflector. The fiber Raman thermodetector comprises a pulsed laser whose output end is connected to the input end of a WDM. Two output ends of the WDM are respectively connected to input ends of a first and second APDs. Output ends of the first and second APDs are respectively connected to input ends of a first and second LNAs. Output ends of the first and second LNAs are connected to the input end of a data acquisition card whose output end is connected with the input end of a computer. The temperature demodulation method can solve the problems of low temperature measuring accuracy, lower temperature measurement stability and low temperature measurement efficiency.

公开(公告)号：US20210116311A1

公开(公告)日：2021-04-22

申请号：US17252992

申请日：2019-05-05

Applicant: TAIYUAN UNIVERSITY OF TECHNOLOGY

Inventor： Mingjiang Zhang ,  Jian Li ,  Jianzhong Zhang ,  Lijun Qiao ,  Baoqiang Yan ,  Yang Xu ,  Baoquan Jin ,  Dong Wang ,  Yu Wang ,  Yuncai Wang

IPC: G01K15/00 ,  G01K11/324

Abstract: A self-calibration detection device and a temperature demodulation method oriented to a fiber Raman temperature sensing system. The self-calibration detection device comprises a fiber Raman thermodetector, thermostatic baths, a multi-mode sensing fiber, and a multi-mode reflector. The fiber Raman thermodetector comprises a pulsed laser whose output end is connected to the input end of a WDM. Two output ends of the WDM are respectively connected to input ends of a first and second APDs. Output ends of the first and second APDs are respectively connected to input ends of a first and second LNAs. Output ends of the first and second LNAs are connected to the input end of a data acquisition card whose output end is connected with the input end of a computer. The temperature demodulation method can solve the problems of low temperature measuring accuracy, lower temperature measurement stability and low temperature measurement efficiency.