Chen Qingyuan, Liu Furong, Xu Guofeng, Yin Boshuo, Liu Ming, Xiong Yifei, Wang Feiying
Key Laboratory of Trans-Scale Laser Manufacturing, Beijing University of Technology, Ministry of Education, Beijing 100124, China.
Beijing Engineering Research Center of Laser Technology, Beijing University of Technology, Beijing 100124, China.
Sensors (Basel). 2024 Jun 6;24(11):3676. doi: 10.3390/s24113676.
Strain sensors that can rapidly and efficiently detect strain distribution and magnitude are crucial for structural health monitoring and human-computer interactions. However, traditional electrical and optical strain sensors make access to structural health information challenging because data conversion is required, and they have intricate, delicate designs. Drawing inspiration from the moisture-responsive coloration of beetle wing sheaths, we propose using Ecoflex as a flexible substrate. This substrate is coated with a Fabry-Perot (F-P) optical structure, comprising a "reflective layer/stretchable interference cavity/reflective layer", creating a dynamic color-changing visual strain sensor. Upon the application of external stress, the flexible interference chamber of the sensor stretches and contracts, prompting a blue-shift in the structural reflection curve and displaying varying colors that correlate with the applied strain. The innovative flexible sensor can be attached to complex-shaped components, enabling the visual detection of structural integrity. This biomimetic visual strain sensor holds significant promise for real-time structural health monitoring applications.
能够快速有效地检测应变分布和大小的应变传感器对于结构健康监测和人机交互至关重要。然而，传统的电学和光学应变传感器由于需要数据转换，且设计复杂、精巧，获取结构健康信息具有挑战性。受甲虫鞘翅湿度响应变色的启发，我们提出使用Ecoflex作为柔性基底。该基底涂覆有法布里-珀罗（F-P）光学结构，包括“反射层/可拉伸干涉腔/反射层”，从而创建了一种动态变色视觉应变传感器。在施加外部应力时，传感器的柔性干涉腔会拉伸和收缩，促使结构反射曲线发生蓝移，并显示与所施加应变相关的不同颜色。这种创新的柔性传感器可以附着在形状复杂的部件上，实现对结构完整性的视觉检测。这种仿生视觉应变传感器在实时结构健康监测应用中具有巨大潜力。
