基于紫外荧光法的SO_2检测系统的研究_王玉田.pdfVIP

3 16 　　　　 Vol.31 No .6 200912 PIEZOELECT RICS ACOU ST OOPT ICS Dec.2009 　　:1004-2474 (2009)06-0915-03 SO 2 王玉田, 杨俊明, 刘建园, 秦瑞峰 ( , 066004) 　　　:(SO ) , , 2 SO 。。 2 , , 。 , 。, (0 ～ 1 500)×10-9 SO , , 。 2 :SO2 ;; :T P212.14 　　　 A Study on SO2 Concentration Detecting System Based on Ultra-violet Fluorescence WANG Yu-tian,YANG Jun-ming ,L U Jian-yuan ,Q N Rui-feng (Hebei Provincal Key Lab.of M ea urement T echnology and In trument, Yan han Univer ity , Qinhuangdao 066004, Chinaa) 　　Abstract:Ba ed on the mechani m that the ulfur diox ide can be timulated to emit ome wavelength f luore - cence in the ultraviolet light, and combined with the optical-fiber en ing technology, a new y tem w hich can be ap- plied to detect the co ncentration of ulfur dioxide(SO )in air i dev eloped.T he whole y tem co n i t of an optical 2 y tem and a cir cuit y tem.T he optical y tem adopt the double-optical path detectio n method u ing the xenon fla h lam p a the ex citatio n light ource and ov ercome the err or fro m in tability of excitatio n light ource, thu high- er preci ion of mea urement ha been achieved.T he circuit y tem adopt the technique of weak ignal mea uring, which can make the weak fluore cence ig nal of intermixing noi e ig nal ex tr act and magnify effectively.T he ex eperi- ment how that thi y tem can maintain a g ood linearity and table detection w hen ulfur dioxide co ncentration range i between 0 and 1 500×10-9, and ha high mea uring accuracy and trong antijamming ability . 　　Key words:mea ure ulfur dioxide concent ratio n;double-optical path ;weak ig n