Wang Jiaqi, Chen Xingwen, Xie Shixing, Bao Guowei, Wu Fan, Meng Cuiling
School of Marine Sciences, Sun Yat-Sen University, Zhuhai 519082, China.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China.
ACS Appl Mater Interfaces. 2023 Nov 22;15(46):53476-53487. doi: 10.1021/acsami.3c12513. Epub 2023 Nov 9.
Current ocean wave observation is achieved by separate battery-powered sensing and signal transmission modules. Owing to the limited electrical supply and information channel space, the long-time span observation is restricted and only wave height and period information rather than the whole wave profile are sent back to the receiver. In this work, a self-powered ocean wave observation system was achieved by a developed polymer network liquid crystal (PNLC)-based smart reflector powered by a tailored triboelectric nanogenerator embedded with one-way overrunning clutches. The off-shore smart reflector modulated the on-shore emitted laser light, where ocean wave motion information can be revealed from the remotely detected reflected laser light without cable connections. The ocean wave rise and fall are distinguished by the developed one-way overrunning clutch, which selects the TENG to power the PNLC. Through the developed paradigm, ocean wave sensing and signal transmission can be achieved simultaneously, which is fully self-powered and free-of-cable. The flume-based self-powered ocean observation was performed with demonstrated wave height and period sensing accuracies of 92.66 and 97.32%, respectively.
当前海浪观测是通过独立的电池供电传感和信号传输模块来实现的。由于电力供应和信息通道空间有限，长时间跨度的观测受到限制，只有波高和周期信息而非整个波形轮廓被传回接收器。在这项工作中，通过一种基于聚合物网络液晶（PNLC）的智能反射器实现了自供电海浪观测系统，该智能反射器由嵌入单向超越离合器的定制摩擦纳米发电机供电。离岸智能反射器调制岸上发射的激光，其中海浪运动信息可以从远程检测到的无电缆连接的反射激光中揭示出来。通过开发的单向超越离合器区分海浪的起伏，该离合器选择摩擦纳米发电机为聚合物网络液晶供电。通过所开发的模式，可以同时实现海浪传感和信号传输，且完全自供电且无电缆。基于水槽的自供电海洋观测得以进行，其波高和周期传感精度分别达到了92.66%和97.32%。
