To provide an electrocardiographic detection device for a vehicle capable of detecting a heart rate even when a noise intrudes into the same frequency band or the same time zone as an R wave of an electrocardiographic waveform.SOLUTION: The frequency band of an R wave is extracted from an acceleration signal (102). When the generation time zone of the peak value of an electrocardiographic signal and that of a peak value exceeding a predetermined threshold of the acceleration signal are within a predetermined time, the peak value of the electrocardiographic signal is determined as a noise (108). When the generation time zones are out of the predetermined time, the peak value of the electrocardiographic signal is determined as an R wave (110). When the peak value of the electrocardiographic signal is determined as an R wave, a heart rate is calculated by using the R wave (112, 114) and when the peak value of the electrocardiographic signal is determined as a noise, a heart rate is calculated by using a T wave (116 to 124).SELECTED DRAWING: Figure 3
【課題】心電波形のR波と同じ周波数帯または同時間帯にノイズが侵入しても心拍数を検出可能な車両用心電検出装置を提供することを目的とする。【解決手段】加速度信号からR波の周波数帯域を抽出し(102)、心電信号のピーク値と、加速度信号の予め定めた閾値を超えたピーク値の発生時間帯が予め定めた時間以内の場合、心電信号のピーク値はノイズと判定し(108)、予め定めた時間外の場合は、心電信号のピーク値をR波と判定する(110)。また、心電信号のピーク値がR波であると判定した場合には、R波を用いて心拍数を算出し(112、114)、心電信号のピーク値がノイズであると判定した場合には、T波を用いて心拍数を算出する(116〜124)。【選択図】図3
ELECTROCARDIOGRAPHIC DETECTION DEVICE FOR VEHICLE
車両用心電検出装置
2021-09-27
Patent
Electronic Resource
Japanese