Raindrop energy-powered autonomous wireless hyetometer based on liquid-solid contact electrification  

作　　者：Chaoqun Xu Xianpeng Fu Chengyu Li Guoxu Liu Yuyu Gao Youchao Qi Tianzhao Bu Yuanfen Chen Zhong Lin Wang Chi Zhang 

机构地区：[1]Center on Nanoenergy Research,School of Physical Science&Technology,School of Mechanical Engineering,Guangxi University,Nanning 530004,China [2]CAS Center for Excellence in Nanoscience,Beijing Key Laboratory of Micro-nano Energy and Sensor,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 101400,China [3]School of Nanoscience and Technology,University of Chinese Academy of Sciences,Beijing 100049,China [4]School of Material Science and Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA

出　　处：《Microsystems & Nanoengineering》2022年第2期175-183,共9页微系统与纳米工程（英文）

基　　金：the support of the National Key R&D Project from the Ministry of Science and Technology(2021YFA1201604);National Natural Science Foundation of China(51922023 and 61874011);Fundamental Research Funds for the Central Universities(El EG6804)。

摘　　要：Triboelectric nanogenerators(TENGs)can directly harvest energy via solid-liquid interface contact electrification,making them very suitable for harvesting raindrop energy and as active rainfall sensors.This technology is promising for realizing a fully self-powered system for autonomous rainfall monitoring combined with energy harvesting/sensing.Here,we report a raindrop energy-powered autonomous rainfall monitoring and wireless transmission system(R-RMS),in which a raindrop-TENG(R-TENG)array simultaneously serves as a raindrop energy harvester and rainfall sensor.At a rainfall intensity of 71 mm/min,the R-TENG array can generate an average short-circuit current,open-circuit voltage,and maximum output power of 15 pA,1800 V,and 325 pW,respectively.The collected energy can be adjusted to act as a stable 2.5 V direct-current source for the whole system by a power management circuit.Meanwhile,the R-TENG array acts as a rainfall sensor,in which the output signal can be monitored and the measured data are wirelessly transmitted.Linder a rainfall intensity of 71 mm/min,the R-RMS can be continuously powered and autonomously transmit rainfall data once every 4 min.This work has paved the way for raindrop energy-powered wireless hyetometers,which have exhibited broad prospects in unattended weather monitoring,field surveys,and the Internet of Things.

关 键 词：ENERGY AUTONOMOUS HARVESTING 

分 类 号：TM31[电气工程—电机]