Presentation Information
[10p-A22-10]Heart rate measurement using millimeter-wave radar
〇Akira Yamahana1, Hiroshi Otera1, Kato Kosaku1, Verdad C. Agulto1, Daichi Eguchi1,3, Phan Thanh Nhat Khoa1, Mironaru Murakami1,2, Makoto Nakajima1 (1.ILE, Univ. Osaka, 2.Fukui Univ. of Technology, 3.Univ. of Hyogo)
Keywords:
millimeter-wave,FMCW millimeter-wave radar,Heart rate measurement
This study investigates non-contact heart rate measurement using FMCW millimeter-wave radar. Conventional methods such as electrocardiographs, pulse oximeters, and smartwatches require physical contact or device attachment, which can cause discomfort during long-term monitoring. Millimeter-wave radar can detect small vibrations without contact and can also measure chest motion through clothing.
In the experiment, a clothed subject sat 60 cm from the radar, and the phase of the IF signal reflected from the chest was measured. Since the signal included respiration and body motion as well as heartbeat, low-frequency components were removed. After processing, a periodic phase oscillation with an amplitude of about 0.8 rad was observed, corresponding to a chest displacement of approximately 300 µm. Fourier analysis showed a clear peak at 1.1 Hz, equivalent to about 66 beats per minute. These results demonstrate that FMCW millimeter-wave radar can detect heart rate non-contactly through clothing and may be useful for future vital sign monitoring.
In the experiment, a clothed subject sat 60 cm from the radar, and the phase of the IF signal reflected from the chest was measured. Since the signal included respiration and body motion as well as heartbeat, low-frequency components were removed. After processing, a periodic phase oscillation with an amplitude of about 0.8 rad was observed, corresponding to a chest displacement of approximately 300 µm. Fourier analysis showed a clear peak at 1.1 Hz, equivalent to about 66 beats per minute. These results demonstrate that FMCW millimeter-wave radar can detect heart rate non-contactly through clothing and may be useful for future vital sign monitoring.