GUO Li-quan, ZHANG Yu-jun, YIN Gao-fang, et al. Design of dissolved oxygen detecting system based on fluorescence lifetime method[J]. 2011, 30(10): 109-111.
GUO Li-quan, ZHANG Yu-jun, YIN Gao-fang, et al. Design of dissolved oxygen detecting system based on fluorescence lifetime method[J]. 2011, 30(10): 109-111. DOI: 10.13873/j.1000-97872011.10.006.
According to the principle of fluorescence quenching
the relation between fluorescence lifetime and concentration of dissolved oxygen is analyzed
phase locked loop(PLL)detecting technology of fluorescence lifetime is studied.A new dissolved oxygen detecting system with fluorescence lifetime method is designed based on ADuC841 SCM system and phase locked loop.The measuring precision is 0.01 mg/L
and the response time is less than 30s
with good stability and high sensitivity.It’s not influenced by environmental light and light source fluctuation.It can realize in situ
real-time and on line detection of the dissolved oxygen.