{"title":"Fiber Sensor for Liquid Level Detection Based on Micro-Arc Air Cavity Structure","authors":"Shuqin Cao, Beibei Mao, Weihao Cheng, Mingzhu Yang, Jingfei Ye, Yongfeng Wu","doi":"10.1002/mop.70186","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>A novel liquid level sensor is devised, leveraging the principle of Fabry-Perot interferometry (FPI). The sensor amalgamates micro-arc and air cavity structures. The micro-arc is fabricated through flame pyrolysis, while the air cavity is created by fusion splicing a SiO<sub>2</sub> microtube with single-mode fiber (SMF). When alterations occur in either the liquid level or temperature, the spectral information primarily manifests as variations in reflected light intensity. Consequently, it provides a new perspective for liquid level and temperature measurements. The FPI sensor is a three-wave interference model. To realize low-temperature sensitivity, an optical fiber is fused at the end of FPI to reduce the reflection of the third reflector. The temperature sensitivity of the sensor is measured at 0.0856 dB/°C, the liquid level sensitivity is determined to be 0.2185 dB/mm. Therefore, the sensor is suitable for conducting liquid level measurements in industrial applications. Additionally, the sensor is simple in structure and does not need special treatment, making it highly competitive in industrial production.</p></div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 4","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microwave and Optical Technology Letters","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mop.70186","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
A novel liquid level sensor is devised, leveraging the principle of Fabry-Perot interferometry (FPI). The sensor amalgamates micro-arc and air cavity structures. The micro-arc is fabricated through flame pyrolysis, while the air cavity is created by fusion splicing a SiO2 microtube with single-mode fiber (SMF). When alterations occur in either the liquid level or temperature, the spectral information primarily manifests as variations in reflected light intensity. Consequently, it provides a new perspective for liquid level and temperature measurements. The FPI sensor is a three-wave interference model. To realize low-temperature sensitivity, an optical fiber is fused at the end of FPI to reduce the reflection of the third reflector. The temperature sensitivity of the sensor is measured at 0.0856 dB/°C, the liquid level sensitivity is determined to be 0.2185 dB/mm. Therefore, the sensor is suitable for conducting liquid level measurements in industrial applications. Additionally, the sensor is simple in structure and does not need special treatment, making it highly competitive in industrial production.
期刊介绍:
Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas.
- RF, Microwave, and Millimeter Waves
- Antennas and Propagation
- Submillimeter-Wave and Infrared Technology
- Optical Engineering
All papers are subject to peer review before publication