Research of Weak Signal Processing Circuit Based on Non-Dispersive Infrared Automobile Exhaust Sensor

Abstract:

Based on the analysis of infrared detection technology and Lambert-Beer law a new kind of quad-channel non-dispersive infrared (NDIR) gas concentration analyzer is designed by applying the modulated IR light source and a quad thermopile sensor into automobile exhaust gases concentration detection. The emphasis is paid on the analysis of modulated light source, gas chamber, sensor and the acquisition and processing circuit of the signal. The result of simulation and analysis of the designed circuit proved the feasibility of the design.

• Periodical: Applied Mechanics and Materials (Volumes 336-338)
• Pages: 163-167
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.336-338.163
• Online since: July 2013
• Authors: Jun Xie, Yi Long Zhang, Yue Feng Yuan
• Keywords: Gas Sensor, NDIR, Weak Signal Detection

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