Flexible sensors in wearable electronics have become increasingly multifunctional due to the development of materials synthesis and structure design. In particular, structural design can not only add capabilities to sensors fabricated from existing available and normal materials, but also offer opportunities for the fabrication of sensors with certain desired functions. Here, we designed a series of fiber-junction structure models, in which two fibers were simply hooked to each other to form a junction on a flexible printed circuit, for fabrication of directional bending sensors. The value and direction of bending angle are related to the change in electronic signal by a theoretical expression, allowing us to employ a simple and practicable method to use available conductive fiber materials to fabricate high-sensitivity, high-resolution and directional bending sensors. In addition, these models are generally applicable, which have broad combination with different conductive fiber, and corresponding bending sensors all possess capability of directional identification. Furthermore, the capability of identifying directional bending was demonstrated by human motion monitoring such as joint bending and muscle contraction.

由于材料合成和结构设计的发展，可穿戴电子设备中的柔性传感器已变得越来越多功能。特别地，结构设计不仅可以为由现有可用材料和普通材料制造的传感器增加功能，而且还为制造具有某些所需功能的传感器提供了机会。在这里，我们设计了一系列的纤维结结构模型，其中两个纤维简单地彼此钩在一起，以在柔性印刷电路上形成结，用于制造定向弯曲传感器。弯曲角的值和方向通过一个理论表达式与电子信号的变化相关，这使我们能够采用一种简单可行的方法来使用可用的导电纤维材料来制造高灵敏度的材料，高分辨率和定向弯曲传感器。另外，这些模型通常适用，它们与不同的导电纤维具有广泛的组合，并且相应的弯曲传感器都具有方向识别的能力。此外，通过人体运动监测（例如关节弯曲和肌肉收缩）证明了识别方向弯曲的能力。