A novel CO2 gas analyzer based on IR absorption |
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Authors: | Guangjun Zhang Xiaoli Wu |
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Institution: | School of Automation Science and Electrical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, PR China |
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Abstract: | Carbon dioxide (CO2) gas analyzer can be widely used in many fields. A novel CO2 gas analyzer based on infrared ray (IR) absorption is presented sufficiently in this paper. Applying Lambert–Beer Law, a novel space-double-beam optical structure is established successfully. The optical structure includes an IR source, a gas cell, a bandpass filter with a transmission wavelength at 4.26 μm, another bandpass filter with a transmission wavelength at 3.9 μm, and two IR detectors. Based on Redial Basic Function (RBF) artificial neural network, the measuring model of IR CO2 analyzer is established with a high accuracy. A dynamic compensation filter is effectively designed to improve the dynamic characteristic of the IR CO2 analyzer without gas pump. The IR CO2 analyzer possesses the advantages of high accuracy and mechanical reliability with small volume, lightweight, and low-power consumption. Therefore, it can be used in such relevant fields as environmental protection, processing control, chemical analysis, medical diagnosis, and space environmental and control systems. |
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Keywords: | Carbon dioxide Gas analyzer IR absorption Space-double-beam optical structure RBF neural network Dynamic compensation filter |
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