A Multichannel Spatial-Domain Fiber Cavity Ringdown Pressure Sensor
A Multichannel Spatial-Domain Fiber Cavity Ringdown Pressure Sensor
复制标题
多通道空域光纤腔衰荡压力传感器
DOI：
10.1109/jsen.2019.2941822
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发表时间：
2020-01
影响因子：
4.3
通讯作者：
Hui Lv
中科院分区：
文献类型：
--
作者：
Weiwei Huang;Yiwen Ou;Chunfu Cheng;Li Qian;Zehao Chen;Li Fang;Hui Lv
提出并实现了一种基于频移干涉的多通道空间域光纤腔衰荡压力传感方案。与现有的多通道FCRD技术相比，多通道FSI-FCRD在空间域中测量来自不同光纤衰荡腔（RDC）的连续波（CW）光的强度衰减率，而不是在时域中测量脉冲光的强度衰减率。它共用一个CW光源、一个慢速探测器和一个慢速数据采集器，大大降低了系统成本。本文对双通道FSI-FCRD压力传感系统进行了实验研究。两个FCRD的位置和施加的压力通过测量相应的振铃距离来获得。测量灵敏度分别为0.030（km<inline-formula><tex-math notation="LaTeX">$^{-1}\cdot $</tex-math></inline-formula> MPa<sup>−1</sup>）和0.042（km<inline-formula><tex-math notation="LaTeX">$^{-1}\cdot $</tex-math></inline-formula> MPa<sup>−1</sup>），最小可探测压力分别为0.126 MPa和0.403 MPa。通过功率预算分析，在相同的实验设置下，在50 km的距离上，最大传感器数量预测为37个。实验和仿真结果表明，该方案具有成本低、灵敏度高、线性响应好、稳定性好等优点，能够提高复用容量，满足多点测量的要求。
We propose and demonstrate a multichannel spatial-domain fiber cavity ringdown (FCRD) pressure sensing scheme based on frequency-shifted interferometry (FSI). In contrast to existing multichannel FCRD techniques, multichannel FSI-FCRD measures intensity decay rates of continuous-wave (CW) light from different fiber ringdown cavities (RDCs) in the spatial domain, rather than those of pulse light in the time domain. It shares one CW light source, one slow detector and one slow data collector, which greatly reduces the system cost. We experimentally investigated a dual-channel FSI-FCRD pressure sensing system. The locations and pressures applied of the two FCRDs were obtained by measuring the corresponding ringdown distances. The measurement sensitivities were 0.030 (km<inline-formula> <tex-math notation="LaTeX">$^{-1}\cdot $ </tex-math></inline-formula> MPa<sup>−1</sup>) and 0.042 (km<inline-formula> <tex-math notation="LaTeX">$^{-1}\cdot $ </tex-math></inline-formula> MPa<sup>−1</sup>), with the minimum detectable pressure of 0.126 MPa and 0.403 MPa, respectively. By power budge analysis, the maximum sensor number was predicted to be 37 over a 50-km distance under the same experimental settings. The experimental and simulated results show that the proposed scheme has the advantages of low cost, high sensitivity, good linear response and good stability, which can enhance the multiplexing capacity and meet the requirements for multipoint measurement.
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