Why the study?
Can alcohol intake be discerned by optoelectronic sensors measuring photoplethysmogram (PPG) signals?
Can alcohol intake be discerned by optoelectronic sensors measuring photoplethysmogram (PPG) signals?
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Optoelectronic sensors using a green-LED can detect alcohol intake by analyzing the harmonics ratio of the photoplethysmogram signal.
We spectroscopically investigate the impact of alcohol intake on photoplethysmogram (PPG) signal and confirm that alcohol intake can be discerned by optoelectronic sensors. This paper focuses on specific spectra of the PPG signal and demonstrates the importance of observing the harmonics ratio of the PPG signal. In contrast to past studies, it is strongly suggested that the best light source for detecting alcohol intake is a green-LED. An analysis of the time evolution of the harmonic ratio shows that it includes important information from which the intake of alcohol can be discerned despite the complexity involved. This assessment is strongly supported by the physical model and the mathematical formulation provided herein.
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Shimizu et al. (2011) studied this question.
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