心冲击图（BCG）和心电图（ECG）分别从力学和电学两个维度实现心脏功能的检测。通过提取两种信号相应的特征参数并进行联合分析，可以反映心脏收缩性能等重要心脏生理指标。针对目前相关采集设备复杂笨重的缺点，本文设计了一种可穿戴式 BCG-ECG 信号联合采集系统，实现了基于加速度计的 BCG 信号采集和基于导电橡胶电极的 ECG 信号采集。通过采集 6 名健康人的信号，以压电薄膜采集的 BCG 信号为参考信号，对比信号波形特征，并分析心动周期采集的差异性。设备采集两种信号的波形特征与标准信号一致，两种信号在心动周期采集方面与传统方法无明显差异。结果表明，该套系统能精确采集人体 BCG 信号和 ECG 信号，为后续在 BCG 信号形成机制以及健康应用方面的研究提供基础。
Ballistocardiogram (BCG) and electrocardiogram (ECG) can realize the detection of cardiac function from mechanical and electrical dimensions respectively. By extracting the corresponding characteristic parameters of the two signals and carrying out joint analysis, an important cardiac physiological index such as cardiac contractility, can be reflected. To overcome the shortcomings of complication and heaviness of the existing acquisition equipment, a wearable BCG-ECG signal acquisition system is designed in this paper, which realizes BCG signal acquisition based on accelerometer and ECG signal acquisition based on conductive rubber electrodes. The signals of 6 healthy persons were collected, and BCG signals collected by piezoelectric films were used as reference signals. The waveform characteristics of signals were compared, and the difference of cardiac cycle acquisition was analyzed. The waveform characteristics of the two signals acquired by the device were consistent with the standard signals, and there was no significant difference in the acquisition of the cardiac cycle between the proposed method and the traditional method. The results show that the system can accurately collect human BCG signals and ECG signals. The system provides a basis for subsequent research on BCG signal formation mechanism and health applications.
引用本文： 肖磊, 李红利, 张先文, 唐劲天, 李月军. 一种可穿戴式心冲击信号-心电信号联合采集系统. 生物医学工程学杂志, 2018, 35(5): 727-732. doi: 10.7507/1001-5515.201705039 复制