Carbon Dioxide Sensor Module Based on NDIR Technology
Libing Zhou, Yaoyi He, Qing Zhang, Lei Zhang
Abstract
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).
Topics & Concepts
Lithium tantalateCarbon dioxide sensorMaterials sciencePyroelectricityMiniaturizationCompensation (psychology)DetectorWaferOptoelectronicsInfraredOpticsElectronic engineeringCarbon dioxideFerroelectricityDielectricLithium niobateChemistryEngineeringNanotechnologyPsychologyPsychoanalysisPhysicsOrganic chemistrySpectroscopy and Laser ApplicationsGas Sensing Nanomaterials and SensorsAdvanced Chemical Sensor Technologies