Paper Info
Title
High-Resolution and Large-Sensing-Range Liquid-Level Sensor Based on Optical Frequency Domain Reflectometry and No-Core Fiber
Abstract
Liquid-level sensors are required in modern industrial and medical fields. Optical liquid-level sensors can solve the safety problems of traditional electrical sensors, which have attracted extensive attention in both academia and industry. We propose a distributed liquid-level sensor based on optical frequency domain reflectometry and with no-core fiber. The sensing mechanism uses optical frequency domain reflectometry to capture the strong reflection of the evanescent field of the no-core fiber at the liquid-air interface. The experimental results show that the proposed method can achieve a high resolution of 0.1 mm, stability of +/- 15 mu m, a relatively large measurement range of 175 mm, and a high signal-to-noise ratio of 30 dB. The sensing length can be extended to 1.25 m with a weakened signal-to-noise ratio of 10 dB. The proposed method has broad development prospects in the field of intelligent industry and extreme environments.
Year
DOI
Venue
2022
10.3390/s22124480
SENSORS
Keywords
DocType
Volume
liquid level, fiber sensor, optical frequency domain reflectometry, no-core fiber, distributed sensing
Journal
22
Issue
ISSN
Citations 
12
1424-8220
0
PageRank 
References 
Authors
0.34
0
7
Name
Order
Citations
PageRank
Guolu Yin100.34
Pengxi Yang200.34
Xiaohua Hu32819314.15
Yu Wang42279211.60
Zeheng Zhang500.34
Fabing Yan600.34
Tao Zhu774.13