{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,2]],"date-time":"2026-04-02T16:05:28Z","timestamp":1775145928033,"version":"3.50.1"},"reference-count":26,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2022,1,22]],"date-time":"2022-01-22T00:00:00Z","timestamp":1642809600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62075023"],"award-info":[{"award-number":["62075023"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012231","name":"Graduate scientific research and innovation foundation of Chongqing, China","doi-asserted-by":"publisher","award":["CYB21061"],"award-info":[{"award-number":["CYB21061"]}],"id":[{"id":"10.13039\/501100012231","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Automobile exhaust gases, such as carbon dioxide (CO2), carbon monoxide (CO), and propane (C3H8), cause the greenhouse effect, photochemical smog, and haze, threatening the urban atmosphere and human health. In this study, a non-dispersive infrared (NDIR) multi-gas detection system consisting of a single broadband light source, gas cell, and four-channel pyroelectric detector was developed. The system can be used to economically detect gas concentration in the range of 0\u20135000 ppm for C3H8, 0\u201314% for CO, and 0\u201320% for CO2. According to the experimental data, the concentration inversion model was established using the least squares between the voltage ratio and the concentration. Additionally, the interference coefficient between different gases was tested. Therefore, the interference models between the three gases were established by the least square method. The concentration inversion model was experimentally verified, and it was observed that the full-scale error of the sensor changed less than 3.5%, the detection repeatability error was lower than 4.5%, and the detection stability was less than 2.7%. Therefore, the detection system is economical and energy efficient and it is a promising method for the analysis of automobile exhaust gases.<\/jats:p>","DOI":"10.3390\/s22030836","type":"journal-article","created":{"date-parts":[[2022,1,23]],"date-time":"2022-01-23T20:36:27Z","timestamp":1642970187000},"page":"836","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":63,"title":["Multi-Gas Detection System Based on Non-Dispersive Infrared (NDIR) Spectral Technology"],"prefix":"10.3390","volume":"22","author":[{"given":"Manlin","family":"Xu","sequence":"first","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology and Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]},{"given":"Bo","family":"Peng","sequence":"additional","affiliation":[{"name":"Liangjiang School of Artificial Intelligence, Chongqing University of Technology, Chongqing 401135, China"}]},{"given":"Xiangyi","family":"Zhu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology and Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]},{"given":"Yongcai","family":"Guo","sequence":"additional","affiliation":[{"name":"Key Laboratory of Optoelectronic Technology and Systems of Ministry of Education, College of Optoelectronic Engineering, Chongqing University, Chongqing 400044, China"}]}],"member":"1968","published-online":{"date-parts":[[2022,1,22]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"991","DOI":"10.1126\/science.268.5213.991","article-title":"On-road vehicle emissions: Regulations, costs, and benefits","volume":"268","author":"Beaton","year":"1995","journal-title":"Science"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1084","DOI":"10.1080\/1073161X.1993.10467186","article-title":"Real-world vehicle emissions: A summary of the third annual CRC-APRAC on-road vehicle emissions workshop","volume":"43","author":"Cadle","year":"1993","journal-title":"Air Waste"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"433","DOI":"10.1007\/s003400050527","article-title":"A tunable diode laser system for the remote sensing of on-road vehicle emissions","volume":"67","author":"Zahniser","year":"1998","journal-title":"Appl. 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