Unconstrained Measurement of Heart Rate Considering Harmonics of Respiratory Signal Using Flexible Tactile Sensor Sheet
Unconstrained Measurement of Heart Rate Considering Harmonics of Respiratory Signal Using Flexible Tactile Sensor Sheet
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DOI：
10.20965/jrm.2021.p0826
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发表时间：
2021-08-01
影响因子：
1.1
通讯作者：
Guo, Shijie
中科院分区：
文献类型：
--
作者：
Matsuo, Kazuya;Mukai, Toshiharu;Guo, Shijie
测量睡眠状态对于监测被护理者的健康状况很有用。睡眠状态可以通过诸如呼吸频率、心率、身体运动和躺姿等生物信息来估计。本文描述了一种考虑呼吸信号谐波的心率测量方法。在心率测量中，呼吸信号的谐波一直没有被考虑。提出了一种不受约束的呼吸、心率和躺姿测量方法，该方法使用智能橡胶传感器，该传感器是为此研究开发的基于橡胶的柔性平面触觉传感器。呼吸和心率是通过对血压的时间序列数据进行频率分析来测量的。呼吸信号的谐波在心率测量中充当噪声。因此，通过消除谐波的影响来改善心率测量。该方法测量心率的平均频率误差为0.144 Hz。实验结果表明，该方法提高了心率测量的精度。因此，这种方法可以精确测量睡眠状态。
Measurement of the sleeping state is useful for monitoring the health of a person being nursed. The sleeping state can be estimated from biological information such as respiration rate, heart rate, body motion, and lying posture. A heart rate measurement method that considers the harmonics of a respiratory signal is described herein. The harmonics of respiratory signals for heart rate measurement has not been considered hitherto. An unconstrained method is proposed for measuring respiration, heart rate, and lying posture using a Smart Rubber sensor, which is a rubber-based flexible planar tactile sensor developed for this study. Respiration and heart rates are measured by applying frequency analysis to time-series data of body pressure. The harmonics of a respiratory signal serves as noise in heart rate measurement. Therefore, the heart rate measurement is improved by eliminating the effects of harmonics. The average frequency error of the heart rate measurement by our proposed method is 0.144 Hz. Experimental results show that our proposed method enhances the precision of heart rate measurement. Hence, this method enables the accurate measurement of the sleeping state.