Dingli Xu, Qiannan Cai, Gang Zhang, Qiang Ge, Linguang Xu
{"title":"采用波长稳定可调谐二极管激光吸收光谱和h-∞滤波算法的双气体传感器。","authors":"Dingli Xu, Qiannan Cai, Gang Zhang, Qiang Ge, Linguang Xu","doi":"10.1177/00037028241310463","DOIUrl":null,"url":null,"abstract":"<p><p>A compact dual-gas sensor based on the two near-infrared distributed feedback diode lasers and a multipass cell has been established for the simultaneous measurement of methane (CH<sub>4</sub>) and acetylene (C<sub>2</sub>H<sub>2</sub>). The time division multiplexing calibration-free direct absorption spectroscopy is used to eliminate the cross interference in the application of multicomponent gas sensors. A wavelength stabilization technique based on the proportion integration differentiation feedback control is developed to suppress laser wavelength drift and an H-infinity (H<sub>∞</sub>) filter algorithm to reduce the system noise. The results show that the detection sensitivity of CH<sub>4</sub> and C<sub>2</sub>H<sub>2</sub> reaches 39.9 parts per billion (ppb) and 47.3 ppb in the optimal integration time of 556 s and 312 s, respectively. In addition, the 31 consecutive hours measured results of CH<sub>4</sub> in outdoor ambient air show that the proposed detection technology is very suitable for high-precision in-situ measurement of trace gases.</p>","PeriodicalId":8253,"journal":{"name":"Applied Spectroscopy","volume":" ","pages":"37028241310463"},"PeriodicalIF":2.2000,"publicationDate":"2025-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Dual-Gas Sensor Employing Wavelength-Stabilized Tunable Diode Laser Absorption Spectroscopy and H-Infinity Filtering Algorithm.\",\"authors\":\"Dingli Xu, Qiannan Cai, Gang Zhang, Qiang Ge, Linguang Xu\",\"doi\":\"10.1177/00037028241310463\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>A compact dual-gas sensor based on the two near-infrared distributed feedback diode lasers and a multipass cell has been established for the simultaneous measurement of methane (CH<sub>4</sub>) and acetylene (C<sub>2</sub>H<sub>2</sub>). The time division multiplexing calibration-free direct absorption spectroscopy is used to eliminate the cross interference in the application of multicomponent gas sensors. A wavelength stabilization technique based on the proportion integration differentiation feedback control is developed to suppress laser wavelength drift and an H-infinity (H<sub>∞</sub>) filter algorithm to reduce the system noise. The results show that the detection sensitivity of CH<sub>4</sub> and C<sub>2</sub>H<sub>2</sub> reaches 39.9 parts per billion (ppb) and 47.3 ppb in the optimal integration time of 556 s and 312 s, respectively. In addition, the 31 consecutive hours measured results of CH<sub>4</sub> in outdoor ambient air show that the proposed detection technology is very suitable for high-precision in-situ measurement of trace gases.</p>\",\"PeriodicalId\":8253,\"journal\":{\"name\":\"Applied Spectroscopy\",\"volume\":\" \",\"pages\":\"37028241310463\"},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2025-01-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Spectroscopy\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1177/00037028241310463\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"INSTRUMENTS & INSTRUMENTATION\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Spectroscopy","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1177/00037028241310463","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
A compact dual-gas sensor based on the two near-infrared distributed feedback diode lasers and a multipass cell has been established for the simultaneous measurement of methane (CH4) and acetylene (C2H2). The time division multiplexing calibration-free direct absorption spectroscopy is used to eliminate the cross interference in the application of multicomponent gas sensors. A wavelength stabilization technique based on the proportion integration differentiation feedback control is developed to suppress laser wavelength drift and an H-infinity (H∞) filter algorithm to reduce the system noise. The results show that the detection sensitivity of CH4 and C2H2 reaches 39.9 parts per billion (ppb) and 47.3 ppb in the optimal integration time of 556 s and 312 s, respectively. In addition, the 31 consecutive hours measured results of CH4 in outdoor ambient air show that the proposed detection technology is very suitable for high-precision in-situ measurement of trace gases.
期刊介绍：
Applied Spectroscopy is one of the world''s leading spectroscopy journals, publishing high-quality peer-reviewed articles, both fundamental and applied, covering all aspects of spectroscopy. Established in 1951, the journal is owned by the Society for Applied Spectroscopy and is published monthly. The journal is dedicated to fulfilling the mission of the Society to “…advance and disseminate knowledge and information concerning the art and science of spectroscopy and other allied sciences.”
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