Patent ID: 8706204
Filing Date: 2014-04-22
Classification: A61B,G16H

Abstract:
1. A system for observing a heart rate of a passenger, comprising: a plurality of different types of heart rate sensors provided on a seat cushion or a seat back; and a control unit for collecting waveforms of the heart rate sensors for respective sensor types, computing accuracies of the waveforms for respective sensor types at each unit time, selecting a waveform having a highest accuracy for each unit time, and then calculating a heart rate; wherein the heart rate sensors comprise electrocardiogram (ECG) sensors; wherein respective pairs of ECG sensors are provided on the seat back and the seat cushion; wherein the control unit configures a plurality of ECG measurement circuit leads by combining the plurality of ECG sensors, thus deriving a plurality of waveforms related to the ECG; and wherein the control unit measures magnitudes of an R-peak and a P-peak of each waveform related to the ECG, and selects a waveform, in which a magnitude of an R-peak is five times or more as large as that of a P-peak, as a representative ECG waveform.