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A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection

A novel optical fiber array-type of sensing instrument with temperature compensation for real-time detection was developed to measure oxygen, carbon dioxide, and ammonia simultaneously. The proposed instrument is multi-sensing array integrated with real-time measurement module for portable applicati...

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Autores principales: Hung, San-Shan, Chang, Hsing-Cheng, Chang, I-Nan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5191068/
https://www.ncbi.nlm.nih.gov/pubmed/27941636
http://dx.doi.org/10.3390/s16122087
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author Hung, San-Shan
Chang, Hsing-Cheng
Chang, I-Nan
author_facet Hung, San-Shan
Chang, Hsing-Cheng
Chang, I-Nan
author_sort Hung, San-Shan
collection PubMed
description A novel optical fiber array-type of sensing instrument with temperature compensation for real-time detection was developed to measure oxygen, carbon dioxide, and ammonia simultaneously. The proposed instrument is multi-sensing array integrated with real-time measurement module for portable applications. The sensing optical fibers were etched and polished before coating to increase sensitivities. The ammonia and temperature sensors were each composed of a dye-coated single-mode fiber with constructing a fiber Bragg grating and a long-period filter grating for detecting light intensity. Both carbon dioxide and oxygen sensing structures use multimode fibers where 1-hydroxy-3,6,8-pyrene trisulfonic acid trisodium salt is coated for carbon dioxide sensing and Tris(2,2′-bipyridyl) dichlororuthenium(II) hexahydrate and Tris(bipyridine)ruthenium(II) chloride are coated for oxygen sensing. Gas-induced fluorescent light intensity variation was applied to detect gas concentration. The portable gas sensing array was set up by integrating with photo-electronic measurement modules and a human-machine interface to detect gases in real time. The measured data have been processed using piecewise-linear method. The sensitivity of the oxygen sensor were 1.54%/V and 9.62%/V for concentrations less than 1.5% and for concentrations between 1.5% and 6%, respectively. The sensitivity of the carbon dioxide sensor were 8.33%/V and 9.62%/V for concentrations less than 2% and for concentrations between 2% and 5%, respectively. For the ammonia sensor, the sensitivity was 27.78%/V, while ammonia concentration was less than 2%.
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spelling pubmed-51910682017-01-03 A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection Hung, San-Shan Chang, Hsing-Cheng Chang, I-Nan Sensors (Basel) Article A novel optical fiber array-type of sensing instrument with temperature compensation for real-time detection was developed to measure oxygen, carbon dioxide, and ammonia simultaneously. The proposed instrument is multi-sensing array integrated with real-time measurement module for portable applications. The sensing optical fibers were etched and polished before coating to increase sensitivities. The ammonia and temperature sensors were each composed of a dye-coated single-mode fiber with constructing a fiber Bragg grating and a long-period filter grating for detecting light intensity. Both carbon dioxide and oxygen sensing structures use multimode fibers where 1-hydroxy-3,6,8-pyrene trisulfonic acid trisodium salt is coated for carbon dioxide sensing and Tris(2,2′-bipyridyl) dichlororuthenium(II) hexahydrate and Tris(bipyridine)ruthenium(II) chloride are coated for oxygen sensing. Gas-induced fluorescent light intensity variation was applied to detect gas concentration. The portable gas sensing array was set up by integrating with photo-electronic measurement modules and a human-machine interface to detect gases in real time. The measured data have been processed using piecewise-linear method. The sensitivity of the oxygen sensor were 1.54%/V and 9.62%/V for concentrations less than 1.5% and for concentrations between 1.5% and 6%, respectively. The sensitivity of the carbon dioxide sensor were 8.33%/V and 9.62%/V for concentrations less than 2% and for concentrations between 2% and 5%, respectively. For the ammonia sensor, the sensitivity was 27.78%/V, while ammonia concentration was less than 2%. MDPI 2016-12-08 /pmc/articles/PMC5191068/ /pubmed/27941636 http://dx.doi.org/10.3390/s16122087 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hung, San-Shan
Chang, Hsing-Cheng
Chang, I-Nan
A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection
title A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection
title_full A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection
title_fullStr A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection
title_full_unstemmed A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection
title_short A Portable Array-Type Optical Fiber Sensing Instrument for Real-Time Gas Detection
title_sort portable array-type optical fiber sensing instrument for real-time gas detection
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5191068/
https://www.ncbi.nlm.nih.gov/pubmed/27941636
http://dx.doi.org/10.3390/s16122087
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