Wearable sensors are gradually enabling decentralized healthcare systems. However, these sensors need to be closely attached to skin, which is unsuitable for long‐term dynamic health monitoring of the patients, such as infants or persons with burn injuries. Here, a wearable capacitive sensor based on the capacitively coupled effect for healthcare monitoring in noncontact mode is reported. It consists of a ring‐shaped top electrode, a disk‐shaped bottom electrode, and a porous dielectric layer with low permittivity. This unique design enhanced the capacitively coupled effect of the sensor, which enables a high noncontact detectivity of capacitance change. When an object approaches the sensor, its capacitance change (ΔC/C_i = −38.7%) is 3–5 times higher than that of previously reported sensors. Meanwhile, the sensor is insensitive to the stretching strain and pressure (ΔC/C_i < 5%) due to the unique ring‐shaped electrode and the incompressible closed cells of the porous dielectric material, respectively. Finally, various human physiological signals (pulse and respiratory) are recorded in noncontact mode, where a person wears loose and soft clothes implanted with the sensor. Thus, it is promising to build smart healthcare clothes based on it to develop wearable decentralized healthcare systems.

中文翻译：

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一种基于环形/盘形电极和多孔电介质的可穿戴电容传感器，用于非接触式医疗保健监测。

可穿戴传感器正在逐渐支持分散式医疗保健系统。然而，这些传感器需要紧密贴合皮肤，不适合对婴儿或烧伤患者等患者进行长期动态健康监测。本文报道了一种基于电容耦合效应的可穿戴电容传感器，用于非接触模式下的医疗保健监测。它由环形顶部电极、盘形底部电极和低介电常数多孔介电层组成。这种独特的设计增强了传感器的电容耦合效应，从而实现了对电容变化的高非接触式检测。当物体接近传感器时，其电容变化（Δ C / C _i = -38.7%）比之前报道的传感器高3-5倍。同时，由于独特的环形电极和多孔介电材料的不可压缩闭孔，传感器对拉伸应变和压力不敏感（Δ C / C _{i < 5%）。}最后，以非接触模式记录各种人体生理信号（脉搏和呼吸），即人穿着植入传感器的宽松柔软的衣服。因此，基于它构建智能医疗服来开发可穿戴去中心化医疗系统是很有希望的。