Objective -> improve stress and sleep monitoring for workers during working hours
Motivation -> High risk of accident among SBB workers related to uncontrolled accidents (fatigue/stress related)
Ecossystem -> Connected device; smartwatch - subject ID - company. Continuous feedback of the health performance and readiness.
Wellbeing at the workplace: Decrease the number of fatigue/stress-related accidents in the workplace (SBB workers)
What it does
Monitor physiological signals from the smartwatch to asses well-being continuously (stress and sleep levels). Sends notification to the subject and the SBB company.
How I built it
Stress and Sleep input from the smartwatch: -Using PPG signal/accelerometer/gyroscope and sleep monitoring from the smartwatch (Samsung GA2, Tyzen 4.0).
(demo using accelerometer and gyrometer sensor)
User interface: Standalone application that monitors stress/sleep levels. Activated when sudden changes are detected by two feedback loops:
- notification to the subject wearing the device ( sleep and stress-related notifications)
- online notification to the company reporting anormal activity from the subject.
Challenges I ran into
Tizen operating system of the watch. Making the new application for Tisen. Finding good stress/sleep measures. Hard to quantify the biological measures (subject dependent).
Accomplishments that I'm proud of
What I learned
High number of stress-fatigue related accidents during workhours. Stress and sleep levels can be accurately detected from the PPG (Photoplethysmogram) variability. This PPG variability is related to acute stress-related events that can be monitored. -> Notify the subject when abnormal activity is detected and send warnings to the company.