Carbon Dioxide Sensor Module Based on NDIR Technology

In this paper, a gas detection system with an environmental compensation algorithm based on nondispersive infrared (NDIR) technology was designed. The prepared infrared pyroelectric detector was a dual-channel type based on the lithium tantalate (LiTaO3) wafer. The design of the optical gas chamber...

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Veröffentlicht in:Micromachines (Basel) 2021-07, Vol.12 (7), p.845
Hauptverfasser: Zhou, Libing, He, Yaoyi, Zhang, Qing, Zhang, Lei
Format: Artikel
Sprache:eng
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Zusammenfassung:In this paper, a gas detection system with an environmental compensation algorithm based on nondispersive infrared (NDIR) technology was designed. The prepared infrared pyroelectric detector was a dual-channel type based on the lithium tantalate (LiTaO3) wafer. The design of the optical gas chamber adopted a combination of two ellipsoids and a spherical top surface, which not only enhanced the coupling efficiency of the light propagation but also facilitated the miniaturization of the sensor module. In addition to this, a temperature and humidity compensation algorithm based on the least square method was proposed to make the measurement accuracy up to ±0.9% full scale (FS).
ISSN:2072-666X
2072-666X
DOI:10.3390/mi12070845