Distributed Measurement Based on Tapered FBG with OFDR

Siyue, Zeng; Peng, Shu‐Lin; Li, Zhengying; Tong, Yuheng

doi:10.1109/icmtma.2018.00059

Cited by 1 publication

(1 citation statement)

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“…However, the sensors in the above case are not temperature compensated. In addition, some researchers have used polarization-maintaining FBGs (Panda-FBGs) [ 24 ], a large-multiplexing-capacity dense ultra-short (DUS)–FBG array [ 25 ], and tapered FBG (TFBG) [ 26 ] to achieve simultaneous temperature and strain measurements. However, in these studies with temperature compensation, the sensor requires a sophisticated fabrication process, which is very high cost and lacks the ability of multi-point measurement.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Compensated Multi-Point Strain Sensing Based on Cascaded FBG and Optical FMCW Interferometry

Feng

Cheng

Chen

et al. 2022

Sensors

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We proposed a novel temperature-compensated multi-point strain sensing system based on cascaded FBG and optical FMCW interferometry. The former is used for simultaneous sensing of temperature and strain, and the latter is used for position information reading and multiplexing. In the experiment, a narrow linewidth laser with continuous frequency-sweeping was used as the light source. After demodulating the beat-frequency signal, the link information of the 16 m fiber was obtained, and the measured result was identical to the actual position. The measurement accuracy reached 50.15 mm, and the dynamic range was up to 22.68 dB. Meanwhile, we completed the sensing experiments for temperature range from 20 °C to 90 °C and strain range from 0 με to 7000 με. The sensitivity of the sensing system to temperature was 10.21 pm/°C, the sensitivity and accuracy to strain were as high as 1.163 pm/με and 10 με, respectively. Finally, the measured strain and temperature values were obtained using the sensing matrix. The sensing system has important practical significance in the field of quasi-distributed strain measurement.

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Section: Introductionmentioning

confidence: 99%