Chen Yuqi, Hong Jianlong, Xiao Yukun, Zhang Huiyun, Wu Jun, Shi Qiongfeng
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, 210096, China.
Adv Sci (Weinh). 2024 Oct;11(40):e2406190. doi: 10.1002/advs.202406190. Epub 2024 Aug 22.
The floor constitutes one of the largest areas within a building with which users interact most frequently in daily activities. Employing floor sensors is vital for smart-building digital twins, wherein triboelectric nanogenerators demonstrate wide application potential due to their good performance and self-powering characteristics. However, their sensing stability, reliability, and multimodality require further enhancement to meet the rapidly evolving demands. Thus, this work introduces a multimodal intelligent flooring system, implementing a 4 × 4 floor array for multimodal information detection (including position, pressure, material, user identity, and activity) and human-machine interactions. The floor unit incorporates a hybrid structure of triboelectric pressure sensors and a top-surface material sensor, facilitating linear and enhanced sensitivity across a wide pressure range (0-800 N), alongside the material recognition capability. The floor array is implemented by an advanced output-ratio method with minimalist output channels, which is insensitive to environmental factors such as humidity and temperature. In addition to multimodal sensing, energy harvesting is co-designed with the pressure sensors for scavenging waste energy to power smart-building sensor nodes. This developed flooring system enables multimodal sensing, energy harvesting, and smart-sport interactions in smart buildings, greatly expanding the floor sensing scenarios and applications.
地板是建筑物内最大的区域之一，也是用户在日常活动中最常与之交互的区域。对于智能建筑数字孪生体而言，采用地板传感器至关重要，其中摩擦电纳米发电机因其良好的性能和自供电特性而展现出广泛的应用潜力。然而，它们的传感稳定性、可靠性和多模态性需要进一步提高，以满足快速发展的需求。因此，这项工作引入了一种多模态智能地板系统，实现了一个4×4的地板阵列，用于多模态信息检测（包括位置、压力、材料、用户身份和活动）以及人机交互。地板单元采用了摩擦电压力传感器和表面材料传感器的混合结构，在宽压力范围（0-800N）内实现了线性且增强的灵敏度，同时具备材料识别能力。地板阵列通过一种具有最少输出通道的先进输出比率方法实现，该方法对湿度和温度等环境因素不敏感。除了多模态传感外，还与压力传感器共同设计了能量收集功能，以收集废能为智能建筑传感器节点供电。这种开发的地板系统实现了智能建筑中的多模态传感、能量收集和智能运动交互，极大地扩展了地板传感场景和应用。
