A High-Resolution Liquid-Level Sensor Based on FabryPerot Interferometer With Fiber Laser Intracavity Sensing

被引：7
作者：
Shi, Jia [1 ,2 ]
Xu, Ziyi [1 ]
Li, Xianguo [1 ]
Bai, Hua [1 ]
Guo, Cuijuan [1 ]
Niu, Pingjuan [1 ]
Yao, Jianquan [3 ]
机构：
[1] Tiangong Univ, Tianjin Key Lab Optoelect Detect Technol & Syst, Sch Elect & Informat Engn, Tianjin 300387, Peoples R China
[2] Southeast Univ, Natl Mobile Communicat Res Lab, Nanjing 210096, Peoples R China
[3] Tianjin Univ, Sch Precis Instruments & Optoelect Engn, Key Lab Optoelect Informat Technol, Minist Educ, Tianjin 300072, Peoples R China
来源：
IEEE SENSORS JOURNAL | 2023年 / 23卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Fabry-Perot interferometer (FPI); fiber ring laser (FRL); high resolution; intracavity sensing; liquid-level sensing; MACH-ZEHNDER INTERFEROMETER; REFRACTIVE-INDEX; PEROT; TRANSDUCER;
D O I：
10.1109/JSEN.2023.3288223
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
High-resolution monitoring of liquid levels over a wide range has always been a great challenge. In this article, a fiber ring laser (FRL) sensor system with Fabry-Perot interferometer (FPI) is proposed for the high-resolution measurement of liquid level. The FPI fabricated with a polyimide film is embedded in an FRL for intracavity sensing. It is used as a reflective sensing head, which generates different reflection losses at different liquid levels to modulate the output power of the FRL. With the intracavity sensing, the resolution of the liquid-level sensing system has been significantly improved from 37.5 to 1.5 mm. The measurement range of the liquid-level sensing system is obtained as 0.6 m. The output stability and measurement error of the sensing system have been discussed. The sensor has a compact structure and a broad application prospect in the field of wide-range and high-resolution liquid-level monitoring, such as in chemical and marine applications.
引用
收藏
页码：16938 / 16943
页数：6
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