??? ??? ??(NDIR)? ??? ??? ??? ???? ?????. ? ??? ???? ????? ???? ??? ?? ??? ??? ???? ? ?????.
??? ?? ??? ?? ????? ???? ??? ??? ??? ????. ?? ??, ?? ??? ??? ???? ?? ??? ?? ???? ??? ??? ??? ?? ???? ??? ????? ????. ?? ??? ???? ????, ?? ?? ??? ??? ???? ? ?? ?????. ???? ??? ???? ?? ??? ??? ?????. ???? ???? ??? ??? ?? ???? (?, ??? ????? ??? ???? ? ???? ????).
Non-dispersive infrared absorption method (NDIR) utilizes this property, the term NDIR has also been long established. Infrared radiation is classified into near-infrared rays, mid-infrared rays, and far-infrared rays corresponding to wavelength. NDIR uses infrared radiation containing wavelengths in mid-infrared radiation of 2.5-25μm to measure the concentration of gas components.
??? ??? ????? ???? ?????? ?? ??? ?? ??? ???? ?? ?????. ?? ??? ???? ???? ????. ?? ??, ?? (N2)? ???? ???? ???? ?? ?? ??? ???? ?? ???? ?????.
NDIR? ??? ?? ???? ?? ??
?? 1: NDIR? ???? ?? ???? ?? ??(?: CO2?? CO ??)
??? ??? ???? ?? ???? ?? ??? ?? ?? ???? ?? ??? ?????. ???? ?? ?? ??? ???? ?? ??? ?? ??? ???? ????? ??? ?? ?? ??? ?????(?? 1).
?? ?? ?? ??? ???? ??? ??? ????(?? 2). ? ??? ??? ???? ?? ??? ??? ???? ?????? ???? ?? "?? ?? ??"? "??"? ??? ? ????. ?? 1?? CO ???? CO2??? CO ??? ?????.
?? 2: ??? ??? ?? ?? ? ???
?? ??? ?? ???? ??? ??? ??? ??? ? ????(?? 2). ?? ?? ????? ???.
?? 3: ?? ??? ??? ???? ??
??? ??? ???? ?? ??? ????, ??? ???? ???? ???? ??? ???? ???? ?????(?? 3).
??? ???? ?? ??? ??? Lambert-Beer? ??? ?? ?????.
??? ???? ?? ?? ??? ??? ?? ?????. ? ??? Lambert-Beer? ???? ?????.
Ι = Ι0exp (-μcd)
Ι : ??? ??
Ι0: ??? ??
c : ?? ??? ?? (?? ??)
μ : ???? (??? ??? ?? ???? ???)
d : ????? (???)? ??
蓝鲸体育直播 ??? ??? ??? ???? ?? ??? ??? ??? ??? ????.
