Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating
We propose and demonstrate a temperature and humidity sensor based on a fluorinated polyimide film and fiber Bragg grating. Moisture-induced film expansion or contraction causes an extra strain, which is transferred to the fiber Bragg grating and leads to a humidity-dependent wavelength shift. The h...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/19/5469 |
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| author | Xiuxiu Xu Mingming Luo Jianfei Liu Nannan Luan |
| author_facet | Xiuxiu Xu Mingming Luo Jianfei Liu Nannan Luan |
| author_sort | Xiuxiu Xu |
| collection | DOAJ |
| description | We propose and demonstrate a temperature and humidity sensor based on a fluorinated polyimide film and fiber Bragg grating. Moisture-induced film expansion or contraction causes an extra strain, which is transferred to the fiber Bragg grating and leads to a humidity-dependent wavelength shift. The hydrophobic fluoride doping in the polyimide film helps to restrain its humidity hysteresis and provides a short moisture breathing time less than 2 min. Additionally, another cascaded fiber Bragg grating is used to exclude its thermal crosstalk, with a temperature accuracy of ±0.5 °C. Experimental monitoring over 9000 min revealed a considerable humidity accuracy better than ±3% relative humidity, due to the sensitized separate film-grating structure. The passive and electromagnetic immune sensor proved itself in field tests and could have sensing applications in the electro-sensitive storage of fuel, explosives, and chemicals. |
| first_indexed | 2024-03-10T16:06:07Z |
| format | Article |
| id | doaj.art-e9109abeb64a40ebbe737735f3471252 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T16:06:07Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-e9109abeb64a40ebbe737735f34712522023-11-20T14:54:03ZengMDPI AGSensors1424-82202020-09-012019546910.3390/s20195469Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg GratingXiuxiu Xu0Mingming Luo1Jianfei Liu2Nannan Luan3School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaSchool of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300401, ChinaWe propose and demonstrate a temperature and humidity sensor based on a fluorinated polyimide film and fiber Bragg grating. Moisture-induced film expansion or contraction causes an extra strain, which is transferred to the fiber Bragg grating and leads to a humidity-dependent wavelength shift. The hydrophobic fluoride doping in the polyimide film helps to restrain its humidity hysteresis and provides a short moisture breathing time less than 2 min. Additionally, another cascaded fiber Bragg grating is used to exclude its thermal crosstalk, with a temperature accuracy of ±0.5 °C. Experimental monitoring over 9000 min revealed a considerable humidity accuracy better than ±3% relative humidity, due to the sensitized separate film-grating structure. The passive and electromagnetic immune sensor proved itself in field tests and could have sensing applications in the electro-sensitive storage of fuel, explosives, and chemicals.https://www.mdpi.com/1424-8220/20/19/5469fluorinated polyimide filmhumidity hysteresisfiber Bragg grating |
| spellingShingle | Xiuxiu Xu Mingming Luo Jianfei Liu Nannan Luan Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating Sensors fluorinated polyimide film humidity hysteresis fiber Bragg grating |
| title | Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating |
| title_full | Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating |
| title_fullStr | Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating |
| title_full_unstemmed | Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating |
| title_short | Fluorinated Polyimide-Film Based Temperature and Humidity Sensor Utilizing Fiber Bragg Grating |
| title_sort | fluorinated polyimide film based temperature and humidity sensor utilizing fiber bragg grating |
| topic | fluorinated polyimide film humidity hysteresis fiber Bragg grating |
| url | https://www.mdpi.com/1424-8220/20/19/5469 |
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