Multi-frequency sensor for remote measurement of breath and heartbeat

[摘要] Remote measurement of breath and heartbeat is desirable in many situations.It avoids the discomfort resulting from electrodes applied on the skin forlong-term patients or during sports acvtivities. Also, surveillance of highsecurity areas or finding survivors of disasters are interestingapplications. Common methods identify the movement of heart and thorax byusing the range resolution provided by UWB pulse radar systems. In this papera low-cost approach is presented, that is based on detection of movement bymeans of Doppler radar sensors. Combining three sensors working in the ISMbands at 433 MHz, 2.4 GHz and 24 GHz, the presence of persons was reliablydetected and the frequency of breath and heartbeat was measured.

[学科分类] 电子、光学、磁材料