Bao Yi-Qiang, Li Bing-Xiang, Zhang Hai-Feng
Opt Express. 2024 Feb 12;32(4):6432-6445. doi: 10.1364/OE.517881.
In this paper, a liquid crystal (LC) tunable origami metastructure (OMS) designed for curvature sensing on cylindrical surfaces to measure their curvature is introduced. The LC employed is K15 (5CB) and the applicable band is 0.36∼23 GHz. When excited by electromagnetic waves (EMWs) within the 4∼16 GHz, the resonance frequency of the OMS shifts from 10.24 GHz to 10.144 GHz, corresponding to a change in absorption amplitude ranging from 0.773 to 0.920. In terms of curvature sensing, the detectable range of curvature spans from 0 to 0.327 mm. The maximum sensitivity (S) achieved for curvature measurement reaches 0.918/mm, accompanied by a quality factor (Q-factor) of 25.88. The proposed OMS embodies numerous excellent traits, including wide-range sensing capabilities and heightened S, promising for applications in bionic skin, smart robotics, and related fields.
本文介绍了一种用于圆柱表面曲率传感以测量其曲率的液晶（LC）可调折纸超结构（OMS）。所采用的液晶是K15（5CB），适用频段为0.36∼23GHz。当在4∼16GHz范围内受到电磁波（EMW）激发时，OMS的共振频率从10.24GHz移至10.144GHz，相应的吸收幅度变化范围为0.773至0.920。在曲率传感方面，可检测的曲率范围为0至0.327mm。曲率测量所实现的最大灵敏度（S）达到0.918/mm，品质因数（Q因子）为25.88。所提出的OMS具有许多优异特性，包括宽范围传感能力和更高的灵敏度，有望应用于仿生皮肤、智能机器人及相关领域。
