Maxim Integrated MAXREFDES101, Руководство пользователя

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Data Format
Table 1. PPG Raw Data Table Column Definitions (PPG_*.csv)
COLUMN DESCRIPTION
Time Time stamp
Sample count Data index ranging from 0 to 255 for monitoring if samples are dropped during
Bluetooth transmission
Green count 1 Optical count detected by photodiode 1
Green count 2 Optical count detected by photodiode 2
X Axis Acceleration (g) Acceleration in x-axis, in unit of g
Y Axis Acceleration (g) Acceleration in y-axis, in unit of g
Z Axis Acceleration (g) Acceleration in z-axis, in unit of g
Heart Rate (bpm) Heart rate, in unit of beats per min
HR confidence (%) Heart rate algorithm extraction confidence, a threshold confidence >85% is
recommended
Algorithm status 0: Rest (no or very light activity). HR confidence threshold: 50%.
1: Non-rhythmic activities that cannot be classified in the other categories. HR
confidence threshold 30%.
2: Walking activity. HR confidence threshold: 30%.
3: Running activity. HR confidence threshold: 30%.
4: Biking activity. HR confidence threshold: 30%.
5: Rhythmic activities that cannot be classified in the other categories. HR
confidence threshold: 30%.
Figure 39. Log file PPG_.csv for PPG measurement.