COMSOL辅助柔性PVDF非接触交互器件

用于人机交互的感知器件可以检测到外界的各种刺激，在可穿戴电子产品中潜力巨大，被各领域科研人员广泛研究。然而，当前主流的刚性交互传感器难以和人体组织紧密贴合，不能精准获取人类活动的各种信息；且接触式柔性交互传感器所呈现的三维感知能力不足、需要额外的电力供应、系统结构繁冗复杂等诸多问题，难以满足元宇宙、混合现实、智能制造等新一代人机交互应用场景的迫切需求。

在本论文中，我们提出一种基于静电效应的非接触、自驱动柔性交互传感策略。具体以聚偏氟乙烯（poly(1,1-difluoroethylene),PVDF）作为研究对象。通过极化技术分别获取正、负电荷载体的PVDF柔性膜，基于两种电荷的静电作用，构建一种柔性膜（PVDF-）对另一种柔性膜（PVDF+）三维空间运动的电动势信号响应，通过建立两者的逻辑对应关系，实现三维运动行为的感知与识别；通过COMSOL有限元仿真模拟材料内部电场线的分布密度以及能量守恒理论，对上述实验进行机理分析；并在实验中通过COMSOL进一步辅助器件的结构设计、性能预测与结构优化。最后构筑不同形态器件进行场景验证，包括：柔性膜形态的指套结构和平面结构，使用刺激膜覆盖的手指刺激两种不同结构感应膜并记录所产生的逻辑信号，通过对信号识别与处理，分别完成《推箱子》小游戏与机械臂倒水两项应用验证；柔性纤维形态的蛛网结构，结合多通道信号采集，使其具备识别非接触刺激物体运动轨迹与方向的功能。

因此，我们提出的柔性PVDF非接触交互器件对人机交互的硬件技术发展提供了新的解决方案，这类策略的提出为柔性交互器件在人工智能、元宇宙等领域的应用提供了全新的应用思路。

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