期刊
IEEE SENSORS JOURNAL
卷 21, 期 22, 页码 25703-25709出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2021.3106385
关键词
Bandwidth-division multiplexing; multiparameter sensing; optical frequency-domain reflectometry
资金
- Ministry of the Interior and Safety [20015728]
- Brain Pool Program - Ministry of Science and ICT through the National Research Foundation of Korea [2020H1D3A2A02111027]
- GIST Research Institute (GRI) under a grant through the GIST, in 2021, South Korea
- Korea Evaluation Institute of Industrial Technology (KEIT) [20015728] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2020H1D3A2A02111027] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The article discusses a multiparameter distributed sensing system based on optical frequency-domain reflectometry (OFDR) with bandwidth-division multiplexing (BDM) technique, which allows for the simultaneous independent measurement of strain and temperature. The system has high accuracy, spatial resolution, and offers an inexpensive potential solution for continuous monitoring of various parameters in complex distributed structures.
We demonstrate a multiparameter distributed sensing system based on optical frequency-domain reflectometry (OFDR) with a bandwidth-divisionmultiplexing (BDM) technique. With the BDM- assisted OFDR, the sensor system can help interrogate multiple parallel sensing optical fibers by scanning the fibers within distinct spectral ranges without any cross talk. A dual-parameter distributed sensing system was set up by multiplexing two types of sensing fibers for the simultaneous independent measurement of strain and temperature. The rms deviations between the applied and measured values of the two parameters are 19 mu epsilon and 1.4 degrees C, respectively, for a sensing spatial resolution of 10 cm. The proposed multiparameter distributed sensor system offers inexpensive potential solution to continuously monitor various parameters and is effective for the health monitoring of complex distributed structures.
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