TY - JOUR
T1 - Simplified wrist-worn heart rate sensor using microwave VCO
AU - McFerran, Christopher
AU - McKernan, Adrian
AU - Buchanan, Neil
PY - 2019/4/11
Y1 - 2019/4/11
N2 - This Letter presents a novel, wrist-worn heart rate sensor, which is comprised of only a passive resonator and a voltage controlled oscillator (VCO). It is clearly demonstrated that valid heart rate data can be extracted off the DC bias circuit of the VCO, making this sensor one of the simplest of its kind ever reported. Experimental results are shown for successful measurements of the user's heart rate when the VCO was tuned to 2.42 GHz, with a DC bias voltage fluctuation of up to 10 mV representing the heart rate. These results are in agreement with those taken using a commercial optical sensor based heart monitor.
AB - This Letter presents a novel, wrist-worn heart rate sensor, which is comprised of only a passive resonator and a voltage controlled oscillator (VCO). It is clearly demonstrated that valid heart rate data can be extracted off the DC bias circuit of the VCO, making this sensor one of the simplest of its kind ever reported. Experimental results are shown for successful measurements of the user's heart rate when the VCO was tuned to 2.42 GHz, with a DC bias voltage fluctuation of up to 10 mV representing the heart rate. These results are in agreement with those taken using a commercial optical sensor based heart monitor.
U2 - 10.1049/el.2018.7893
DO - 10.1049/el.2018.7893
M3 - Letter
SN - 0013-5194
VL - 55
SP - 370
EP - 372
JO - IET Electronic Letters
JF - IET Electronic Letters
IS - 7
ER -