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A Doppler Radar System for Sensing Physiological Parameters in Walking and Standing Positions
Malikeh Pour Ebrahim1, Majid Sarvi2, Mehmet Rasit Yuce3
1Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Melbourne 3168, Australia. melika.pour.ebrahim@monash.edu.
Sensors (Basel, Switzerland)
|March 4, 2017
Summary
This study presents a Doppler radar system for wireless sensing of respiration rate by monitoring chest motion. The system successfully monitored two subjects simultaneously in various positions, showing promise for remote patient monitoring.
Area of Science:
- Biomedical Engineering
- Signal Processing
- Wireless Sensing
Background:
- Respiration rate is a critical physiological parameter for healthcare applications.
- Doppler radar offers a non-contact method for monitoring physiological signals like chest motion.
- Simultaneous monitoring of multiple patients in diverse positions presents a significant challenge for current radar systems.
Purpose of the Study:
- To develop and evaluate a complete transmitter-receiver Doppler radar system for wireless sensing of respiration rate.
- To assess the system's capability for simultaneous monitoring of multiple subjects in various dynamic positions.
Main Methods:
- A 4 GHz continuous wave Doppler radar system was designed for signal transmission and reception.
- Base-band data was extracted from phase-shifted signals reflecting chest movements.
- Experimental evaluations were conducted with one and two subjects in standing and walking positions.
Main Results:
- The Doppler radar system effectively extracted respiration rate data from chest motion.
- Simultaneous monitoring of two subjects' breathing rates was achieved in different positions.
- Detailed signal analysis demonstrated the system's accuracy in capturing varying breathing patterns.
Conclusions:
- The developed Doppler radar system shows potential for non-contact, remote monitoring of respiration rate.
- The system's ability to track multiple individuals simultaneously in dynamic scenarios is a key advancement.
- This technology could significantly benefit future medical monitoring, particularly in emergency and military settings.
Keywords:
Doppler radararctangent demodulationphysiological parameters monitoringremote sensingrespiration rateMore Related Videos
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