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Implementation of multiple-channel capacitive ECG measurement based on conductive fabric

机译：基于导电织物的多通道电容心电图测量的实现

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摘要

Capacitive electrocardiogram (cECG) measurement is an attractive approach for long-term health monitoring. However, there is little literature available for the implementation of multiple-channel cECG system in standard limb leads. The circuit diagram for such a system is also rarely available in literature. This paper presents a multiple-channel limb-lead cECG system that utilized conductive fabrics as the capacitive sensors. The design criteria and the corresponding circuit diagram are described in detail. The proposed system also incorporates the capacitive driven-body (CDB) circuit to reduce the common-mode power-line interference (PLI). The presented system is verified to be stable by theoretic analysis and long-term experiments. The signals acquired by the presented system are competitive with those by commercially available electrocardiogram (ECG) machines. The feasible size and distance to the subject for the sensor made by conductive fabric have also been evaluated by a series of tests. From the test results, the sensor is suggested to be of greater than 60 cm2 in area and not more than 3 mm in distance for cECG measurement.
机译：电容心电图（cECG）测量是长期健康监测的一种有吸引力的方法。但是，几乎没有文献可用于在标准肢体导联中实施多通道cECG系统。在文献中也很少有这种系统的电路图。本文提出了一种多通道肢体导联cECG系统，该系统利用导电织物作为电容传感器。详细描述了设计标准和相应的电路图。拟议的系统还包含电容性驱动体（CDB）电路，以减少共模电源线干扰（PLI）。理论分析和长期实验验证了所提出系统的稳定性。所提出的系统所获取的信号与市售心电图（ECG）机器所产生的信号具有竞争力。通过一系列测试还评估了由导电织物制成的传感器的可行尺寸和到受试者的距离。根据测试结果，建议传感器面积大于60 cm2，距离不大于3 mm，以进行cECG测量。

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