期刊
IEEE SENSORS JOURNAL
卷 23, 期 20, 页码 24568-24574出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2023.3310114
关键词
Sensors; Strain; Strain measurement; Optical fiber sensors; Vibrations; Vibration measurement; Fiber gratings; Microfiber coupler; optical fiber sensor; strain sensing; vibration measurement
In this study, a sensor based on an optical microfiber coupler (OMC) and a Sagnac ring is proposed to achieve large-range and high-sensitivity strain and vibration measurements. The sensor takes advantage of the sensitivity of the evanescent field around the OMC and the tensile resistance of the Sagnac ring, and experimental results demonstrate its effectiveness in strain and vibration measurements.
In the field of structural health monitoring, it has been pursued to achieve large-range and high-sensitivity strain and vibration measurements. This article proposes a sensor based on an optical microfiber coupler (OMC) and a Sagnac ring to achieve large-range and high-sensitivity strain and vibration measurements. The sensor takes advantage of the high sensitivity of the evanescent field around the OMC and the high tensile resistance of the Sagnac ring. This article analyzes the strain and vibration sensing mechanism, simulates the mode distribution in the OMC, and presents an experimental setup. The experimental results demonstrate that the sensor can achieve strain measurement with a sensitivity of -9.11 pm/ mu e in the range of 0-4500 mu e and vibration measurement at 0.5 Hz-5 kHz. The proposed sensor provides potential technical support for the fields of structural health monitoring and fault diagnosis.
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