The final goal of this study is to provide a sleep-monitoring device that indexes sleep status and allows users to measure their sleep status and easily recognize how to improve their sleep. As a first step toward achieving this, we have developed a prototype system with a simple structure consisting of a bed sheet and a pillow case embraided with a piezoelectric poly-L-lactic acid (PLLA) braided cord, enabling in situ observation of sensing body movements and vital signs during sleep. A PLLA braided cord as a material for a new wearable sensor is flexible and feels soft, which can sense complex human motion without using a complex computer system. As a preliminary experiment, the pulse wave and breathing were observed in situ using the prototype system when the subject lay awake on a bed, where the subject first lay on their back and then lay on their side. Optimization of the piezoelectric PLLA embroidery was performed only on selected patterns. It was found that the pulse wav...

中文翻译：

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压电编织线在睡眠中感知生命体征的应用

这项研究的最终目标是提供一种睡眠监测设备，该设备可以对睡眠状态进行索引，并允许用户测量其睡眠状态并轻松识别如何改善睡眠。作为实现此目标的第一步，我们开发了一种原型系统，该系统具有简单的结构，包括床单和枕头套，上面装有压电聚L-乳酸（PLLA）编织线，可以就地观察传感体睡眠期间的动作和生命体征。PLLA编织线作为新型可穿戴传感器的材料，具有柔韧性和柔软感，无需使用复杂的计算机系统即可感知复杂的人体运动。作为一项初步实验，当受试者躺在床上时，使用原型系统在原位观察脉搏波和呼吸，受试者首先躺在他们的背上，然后躺在他们的身边。压电PLLA绣花的优化仅在选定的图案上执行。发现脉冲波形...