On-Road Evaluation of an Unobtrusive In-Vehicle Pressure-Based Driver Respiration Monitoring System

Area of Science:

• Automotive Engineering
• Biomedical Engineering
• Physiological Monitoring

Background:

• In-vehicle physiological sensing is crucial for driver monitoring and automotive safety.
• Existing methods may be intrusive or limited to controlled environments.
• Repurposing occupant classification electronics offers a novel approach.

Purpose of the Study:

• To assess the feasibility of a pressure-based system for capturing respiration signals in real-world driving conditions.
• To evaluate the accuracy of detecting respiration rate using repurposed occupant classification sensors.
• To explore the potential of unobtrusive in-cabin sensing for driver monitoring.

Main Methods:

• Utilized a fluid-filled pressure bladder sensor embedded in the driver's seat.
• Collected data during normal on-road driving conditions.
• Applied filtering techniques to isolate respiratory signals from noise and motion artifacts.

Main Results:

• The system reliably detected respiration rate in a dynamic driving environment.
• Achieved a mean absolute error of 1.5 breaths per minute (9.2% of the mean true rate).
• Demonstrated the ability to bridge the gap between laboratory tests and real-world automotive deployment.

Conclusions:

• The pressure-based system shows potential for unobtrusive physiological monitoring in vehicles.
• This technology can aid in early detection of driver fatigue and impairment.
• It supports improved post-crash triage and broader in-cabin health monitoring applications.