کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
741002 894213 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Design of a novel gas sensor structure based on mid-infrared absorption spectrum
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Design of a novel gas sensor structure based on mid-infrared absorption spectrum
چکیده انگلیسی

A new type of light-collecting structure that can greatly improve signal-to-noise ratio for gas test was designed on the basis of mid-infrared absorption spectrum principle. A rotational symmetric ellipsoid reflector was employed to collect the mid-infrared radiation with the light source and detector on two focuses, and Beer–Lambert law was applied to construct related math models. Theoretical analysis showed that this structure could perfectly enhance the gains of signals by 648 times. Experimental analysis of methane gas was carried out by using principle of differential absorption, 3.31 μm mid-infrared absorption wavelength and double PbSe detectors. The detection limit of this system was 50 ppm and the test precision was as high as 3%. Due to the attenuation and imprecise ellipsoid reflector, the experimental gain of differential signal was 220 times.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 147, Issue 1, 18 May 2010, Pages 5–9
نویسندگان
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