Proceedings of the 2015 Joint International Mechanical, Electronic and Information Technology Conference

Sinusoidal Amplitude Modulation and Coherent Demodulation Technique for Chlorophyll Fluorescence Measurement

Authors
Gang Li, Juan Zhang, Sheng Chang
Corresponding Author
Gang Li
Available Online December 2015.
DOI
10.2991/jimet-15.2015.146How to use a DOI?
Keywords
chlorophyll fluorescence; sinusoidal amplitude modulation; coherent demodulation; signal to noise ratio; measurement error
Abstract

As a quick and non-intrusive probe of photosynthesis, the chlorophyll fluorescence has been widely studied. Extracting the weak fluorescence signal from the strong noise is necessary to the chlorophyll fluorescence measurement and analysis. In this paper, the time-domain and frequency-domain characteristics of the chlorophyll fluorescence signal and noise caused by the actinic light and the saturation pulse light were analyzed, and a new fluorescence measurement technique, sinusoidal amplitude modulating and coherent demodulating the fluorescence signal, was presented. Using the new technique, the measurement light was modulated by a 1KHz sinusoid, the modulated noisy fluorescence was demodulated using the coherent method with several different cut off frequencies, and signal to noise ratios and measurement errors were calculated and analyzed. The results indicated that the new measurement technique can be employed to measure accurately and efficiently the chlorophyll fluorescence in situ.

Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

Volume Title
Proceedings of the 2015 Joint International Mechanical, Electronic and Information Technology Conference
Series
Advances in Computer Science Research
Publication Date
December 2015
ISBN
978-94-6252-129-2
ISSN
2352-538X
DOI
10.2991/jimet-15.2015.146How to use a DOI?
Copyright
© 2015, the Authors. Published by Atlantis Press.
Open Access
This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Cite this article

TY  - CONF
AU  - Gang Li
AU  - Juan Zhang
AU  - Sheng Chang
PY  - 2015/12
DA  - 2015/12
TI  - Sinusoidal Amplitude Modulation and Coherent Demodulation Technique for Chlorophyll Fluorescence Measurement
BT  - Proceedings of the 2015 Joint International Mechanical, Electronic and Information Technology Conference
PB  - Atlantis Press
SP  - 786
EP  - 789
SN  - 2352-538X
UR  - https://doi.org/10.2991/jimet-15.2015.146
DO  - 10.2991/jimet-15.2015.146
ID  - Li2015/12
ER  -