Influence of Armband Form Factors on Wearable ECG Monitoring Performance
Influence of Armband Form Factors on Wearable ECG Monitoring Performance
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DOI：
10.1109/jsen.2021.3059997
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发表时间：
2021-05-01
影响因子：
4.3
通讯作者：
Jur, Jesse S.
中科院分区：
文献类型：
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作者：
Li, Braden M.;Mills, Amanda C.;Jur, Jesse S.
在可穿戴技术创新的当前状态下，有大量的生物监测设备可用于记录用户的心电图（ECG），这是心血管健康的关键指标。在这些设备中，臂带形状因子用作用于电子系统集成的方便的一体化平台;然而，当前的大部分文献没有解决实现可靠的系统级ECG感测所需的适当电极位置或接触压力。因此，本文将阐明电极的位置和接触压力的作用，对心电图传感性能的电子纺织品（E-纺织品）袖带上左上臂。我们首先进行了心电图信号表征，以验证理想的臂带电极放置测量高品质的信号，而不牺牲实际组装的臂带。然后，我们对臂章与上臂之间的接触压力进行建模和实验量化，将其作为臂章尺寸的函数，这是决定皮肤电极阻抗和心电图信号质量的关键参数。最后，我们评估臂带形状因子的大小如何影响其ECG感测性能。我们的实验结果证实，臂带表现出500 Pa至1500 Pa之间的建模接触压力可以采集ECG信号。然而，显示1297 +/-102 Pa的实验接触压力的臂带尺寸证明了与湿电极基准相比具有相似信噪比（SNR）的最佳性能。在这项工作中讨论的基本设计参数作为一个基准，为未来的E-纺织品和可穿戴的形状因子的设计与高效的传感性能。
In the current state of innovation in wearable technology, there is a vast array of biomonitoring devices available to record electrocardiogram (ECG) in users, a key indicator of cardiovascular health. Of these devices, armband form factors serve as a convenient all-in-one platform for integration of electronic systems; yet, much of the current literature does not address the appropriate electrode location nor contact pressures necessary to achieve reliable system level ECG sensing. Therefore, this paper will elucidate the role of electrode location and contact pressure on the ECG sensing performance of an electronic textile (E-textile) armband worn on the upper left arm. We first carry out an ECG signal characterization to validate the ideal armband electrode placement necessary to measure high quality signals without sacrificing practical assembly of the armband. We then model and experimentally quantify the contact pressure between the armband onto the upper arm as a function of armband size, a critical parameter dictating skin-electrode impedance and ECG signal quality. Finally, we evaluate how the size of the armband form factor affects its ECG sensing performance. Our experimental results confirm that armbands exhibiting modeled contact pressures between 500 Pa to 1500 Pa can acquire ECG signals. However, armband sizes exhibiting experimental contact pressures of 1297 +/- 102 Pa demonstrate the best performance with similar signal-to-noise ratios (SNR) compared to wet electrode benchmarks. The fundamental design parameters discussed in this work serve as a benchmark for the design of future E-textile and wearable form factors with efficient sensing performance.