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20 May 2009 Gas monitor technology of electrical modulation non-dispersion infrared sensor
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Gas concentration signal acquisition of electrical modulation Non-dispersed Infrared (NDIR) sensors has advantages of high measurement accuracy, adapting to wider concentration range, calibrating automatically and so on. Narrow-band interference filter to some kind of gas detection is fixed on the sensor. Gas concentration can be showed by detecting infrared ray's strength. Infrared source, gas room and infrared detector are set in one optical axis for better resolution of gas infrared absorption signal. Some gas concentration detection system can be designed by using NDIR sensor. The measurement accuracy of system is obviously improved by digital filtering, linear interpolation and temperature compensation, etc. Through some literature materials researching, we find NDIR sensing and detection linearity is better, and the detection error is higher, which can be applied in many kinds of gas monitoring instrument.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yu Chen and Rongxing Guo "Gas monitor technology of electrical modulation non-dispersion infrared sensor", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72833E (20 May 2009);


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