论文信息 - Noncontact heart rate measurement using a 24 GHz Doppler radar

Noncontact heart rate measurement using a 24 GHz Doppler radar

Current heart rate measurement methods include the use of ECG or pulse oximeter systems. While these systems are effective, they require skin contact. It has been demonstrated that Doppler radars can be used to measure heart rates too. This paper presents the design of a modified 24 GHz Doppler system. The modified signal conditioning board uses a 2-stage amplifier and a simple dc offset compensation circuit. The design removes the unstable problem and reduces circuit noise. The signal processing algorithm used is also presented. Measurements on 16 volunteers were made using the modified system and promising results have been obtained.

[1] James C. Lin,et al. Microwave Apexcardiography , 1979 .

[2] Ieee Standards Board. IEEE standard for safety levels with respect to human exposure to radio frequency electromagnetic fields, 3kHz to 300 GHz , 1992 .

[3] W. Ser,et al. Cardiac activity detection: A fast prototyping approach with health safety considerations , 2012, 2012 IEEE-EMBS Conference on Biomedical Engineering and Sciences.

[4] G. El Zein,et al. Low power microwave systems for heartbeat rate detection at 2.4, 5.8, 10 and 16 GHz , 2008, 2008 First International Symposium on Applied Sciences on Biomedical and Communication Technologies.

[5] A. Ahlbom. Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz) , 1998 .

[6] Changzhi Li,et al. A Portable Noncontact Heartbeat and Respiration Monitoring System Using 5-GHz Radar , 2007, IEEE Sensors Journal.

[7] Jenshan Lin,et al. Range correlation and I/Q performance benefits in single-chip silicon Doppler radars for noncontact cardiopulmonary monitoring , 2004, IEEE Transactions on Microwave Theory and Techniques.

[8] Changzhi Li,et al. Recent advances in Doppler radar sensors for pervasive healthcare monitoring , 2010, 2010 Asia-Pacific Microwave Conference.