A wearable vital-sign sensor using a self-oscillating active antenna and envelope detection successfully measured heartbeat rates that agreed very well with a finger pulse oximeter.
A proposed wearable vital-sign sensor using an active antenna and envelope detection technique successfully measures respiration and heartbeat rate with reduced circuit complexity.
A wearable vital-sign sensor with the self-oscillating active antenna is proposed in this paper. The active antenna is employed to radiate the radio-frequency signal and receive the injection signal reflected from the moving human chest. Since the envelope detection technique is adopted to demodulate the vital signs from the modulated output of the active antenna, the circuit complexity, cost, and circuit size can be significantly reduced. The developed sensor is experimentally validated to detect the respiration and heartbeat rate of a human adult. The measured heartbeat rate agrees that obtained by the finger pulse oximeter very well.
Tseng et al. (Thu,) conducted a other in Vital signs monitoring. Wearable vital-sign sensor with self-oscillating active antenna vs. Finger pulse oximeter was evaluated on Respiration and heartbeat rate detection. A wearable vital-sign sensor using a self-oscillating active antenna and envelope detection successfully measured heartbeat rates that agreed very well with a finger pulse oximeter.