MW-PPG Sensor: An on-Chip Spectrometer Approach

Multi-wavelength photoplethysmography (MW-PPG) sensing technology has been known to be superior to signal-wavelength photoplethysmography (SW-PPG) sensing technology. However, limited by the availability of sensing detectors, many prior studies can only use conventional bulky and pricy spectrometers...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2019-08, Vol.19 (17), p.3698
Main Authors: Chang, Cheng-Chun, Wu, Chien-Ta, Choi, Byung Il, Fang, Tong-Jing
Format: Article
Language:English
Subjects:
Algorithms
Architectural engineering
Biosensing Techniques
Blood pressure
Heart rate
Humans
International conferences
Lab-On-A-Chip Devices
Light
multi-wavelengths
MW-PPG
on-chip spectrometers
Photoplethysmography
Physiology
Semiconductors
Sensors
Signal processing
Signal to noise ratio
Skin
Spectrometers
Spectrum Analysis
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Summary:Multi-wavelength photoplethysmography (MW-PPG) sensing technology has been known to be superior to signal-wavelength photoplethysmography (SW-PPG) sensing technology. However, limited by the availability of sensing detectors, many prior studies can only use conventional bulky and pricy spectrometers as the detectors, and hence cannot bring the MW-PPG technology to daily-life applications. In this study we developed a chip-scale MW-PPG sensor using innovative on-chip spectrometers, aimed at wearable applications. Also in this paper we present signal processing methods for robustly extracting the PPG signals, in which an increase of up to 50% in the signal-to-noise ratio (S/N) was observed. Example measurements of saturation of peripheral blood oxygen (SpO ) and blood pressure were conducted.
ISSN:1424-8220
1424-8220
DOI:10.3390/s19173698