论文信息 - Temperature compensated NDIR CH4 gas sensor with focused beam structure

Temperature compensated NDIR CH4 gas sensor with focused beam structure

With concave mirror surfaces, the IR light has been focused into circular shape and the intensity of IR light on the detector side has been enhanced effectively. Based upon the simulation results, a new NDIR gas sensor has been prototyped with high efficiency. Using concave mirror surfaces, the output voltages of gas sensor are significantly increased about from 2.15 V (vertical mirror structure) to 3.62 V at 0 ppm CH4 concentration. After temperature compensation, the detection error has been reduced from 2000 ppm to less than 200 ppm within 15 °C to 35 °C.

SeungHwan Yi | JongSeon Park

[1] L. Vasanelli,et al. A novel gas sensor based on SnO2/Os thin film for the detection of methane at low temperature , 1999 .

[2] Fernando López,et al. Spectrally selective gas cell for electrooptical infrared compact multigas sensor , 1995 .

[3] Philippe Dondon,et al. Development of a reliable methane detector , 1997 .

[4] N. Lawrence. Analytical detection methodologies for methane and related hydrocarbons. , 2006, Talanta.

[5] K. Bertilsson,et al. Experimental Evaluation of a Thermopile Detector With SU-8 Membrane in a Carbon Dioxide Meter Setup , 2009, IEEE Sensors Journal.

[6] G. Stewart,et al. Design of a portable optical sensor for methane gas detection , 2006 .

[7] S. Okazaki,et al. A novel method of temperature compensation for a stable combustion-type gas sensor , 2001 .