Abstract
A dual-gas sensor system is developed for CO and CO2 detection using a single broadband light source, pyroelectric detectors and time-division multiplexing (TDM) technique. A stepper motor based rotating system and a single-reflection spherical optical mirror are designed and adopted for realizing and enhancing dual-gas detection. Detailed measurements under static detection mode (without rotation) and dynamic mode (with rotation) are performed to study the performance of the sensor system for the two gas samples. The detection period is 7.9 s in one round of detection by scanning the two detectors. Based on an Allan deviation analysis, the 1σ detection limits under static operation are 3.0 parts per million (ppm) in volume and 2.6 ppm for CO and CO2, respectively, and those under dynamic operation are 9.4 ppm and 10.8 ppm for CO and CO2, respectively. The reported sensor has potential applications in various fields requiring CO and CO2 detection such as in the coal mine.
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This work has been supported by the National Key R&D Program of China (Nos.2016YFD0700101 and 2016YFC0303902), the National Natural Science Foundation of China (Nos.61775079, 61627823 and 61307124), the Science and Technology Planning Project of Guangdong Province, China (No.2017A020216011), the Science and Technology Development Program of Jilin Province, China (No.20140307014SF), the Industrial Innovation Program of Jilin Province, China (No.2017C027), and Changchun Municipal Science and Technology Bureau, China (No.14KG022).
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Dong, M., Zhong, Gq., Miao, Sz. et al. CO and CO2 dual-gas detection based on mid-infrared wideband absorption spectroscopy. Optoelectron. Lett. 14, 119–123 (2018). https://doi.org/10.1007/s11801-018-7248-1
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DOI: https://doi.org/10.1007/s11801-018-7248-1