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Suppression of Sunlight Interference for Fluorescence In Situ Measurement

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Abstract:

Except for system noise, the sunlight interference can severely influence the result of fluorescence in situ measurement. In this paper, we analyzed the noise sources of the fluorescence in situ measurement system, discussed the characteristics of sunlight interference, and studied the performances of three sunlight interference suppression methods that respectively based on pulse width modulation, lock-in amplifier and pseudorandom sequence modulation. Experiment results show that methods based on lock-in amplifier and pseudorandom sequence modulation can effectively suppress sunlight interference.

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Info:

Periodical:

Applied Mechanics and Materials (Volumes 513-517)

Pages:

3688-3690

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.513-517.3688

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Online since:

February 2014

Authors:

Chao Yi Shi*, Yu Jun Zhang, Gao Fang Yin, Nan Jing Zhao, Zhi Gang Wang, Xue Xiao, Ting Ting Gan, Xin Xin Dong

Keywords:

Lock-In Amplifier, Pseudorandom Sequence Modulation, Pulse Width Modulation, Sunlight Interference

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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