Vital Signs Identification System With Doppler Radars and Thermal Camera

Area of Science:

• Biomedical Engineering
• Signal Processing
• Sensor Fusion

Background:

• Non-contact vital signs monitoring is crucial, especially during global health crises.
• Existing methods struggle with multi-person scenarios and precise identification.
• The need for robust systems in public spaces is increasing.

Purpose of the Study:

• To develop and validate the VSign-ID system for non-contact, multi-person vital signs identification.
• To enhance the range and accuracy of vital signs detection in crowded environments.
• To enable the identification of individual vital signs from a group.

Main Methods:

• Utilized multiple Doppler radars to expand measurement range.
• Proposed a space and time matching mechanism for vital signs identification.
• Integrated a thermal camera for person detection and movement tracking.
• Coordinated Doppler radars and thermal camera for synchronized data acquisition.

Main Results:

• VSign-ID successfully extracts and identifies vital signs (respiration and heartbeat rates) of multiple individuals.
• Demonstrated reduced estimation errors (-4.85 dB for respiration, -2.36 dB for heartbeat) compared to system resolution.
• Achieved accurate vital signs identification even with five closely seated individuals using only two radars.

Conclusions:

• The VSign-ID system offers an efficient solution for non-contact, multi-person vital signs monitoring.
• Sensor fusion of Doppler radar and thermal imaging enhances accuracy and range.
• The developed system is suitable for deployment in public spaces for health surveillance.