TOKYO, Sept. 10 (Xinhua) -- Researchers in Japan have developed a new sensor system which could detect heart rate by amplifying weak pulse from skin surface on back.
A research group led by Tsuji Toshio, professor of Hiroshima University, unveiled the research result on Monday. The sensor system uses oscillator to detect microvibration signals that the heart beats send to muscles and bones on the back.
In addition, the sensor is wrapped with polyester of 2 cm thick to filter high frequency noises such as speaking voice and vibration of running vehicle.
Moreover, microphone in the sensor system could shift signals detected by oscillator into heart sounds, which are the noises generated by the beating heart and the resultant flow of blood through it.
Therefore, without need to fix on body, the sensor system could get heart beat information on a par with electrocardiogram.
Automotive seats installed with the system could prevent accidents caused by drowsiness or sudden illness of drivers.