摘要
设计了一种环境无线能量收集式超高频蜂窝物联网标签的系统架构,包括无线能量收集电路、环境温度感知电路、超高频RFID标签电路、嵌入式程序等软硬件,研制出无线能量收集式超高频蜂窝物联网标签,其兼容ISO/IEC 18000-6C超高频RFID空口标准协议,具有温度感知与射频识别功能。无线能量收集式超高频蜂窝物联网标签收集环境中GSM900、GSM1800频段无线能量,将其转换成直流,经过DC-DC升压电路(BQ25570)后驱动无线收发前端电路模块、MSP430单片机、温度感知电路等模块工作,实现环境温度无线感知与传输。测试结果表明,收集的射频功率为-14dBm时,RF-DC转换效率高于39%,直流输出电压高于330mV,冷启动BQ25570和标签正常工作。无线能量收集式物联网标签克服了有源标签需频繁更换电池的缺点,具有识别灵敏度高、通信距离远、使用寿命长和免维护等优点,在冷链仓储物流领域应用前景广泛。
A system architecture of environmental wireless energy harvesting UHF cellular IoT tags is designed,including software and hardware such as wireless energy harvesting circuits,environmental temperature sensing circuits,UHF RFID tag circuits,and embedded programs.The wireless energy harvesting UHF cellular IoT tag is developed,which is compatible with the ISO/IEC 18000-6C UHF RFID air interface standard protocol and has temperature sensing and radio frequency identification functions.The wireless energy harvesting UHF cellular IoT tag collects wireless energy in the GSM900 and GSM1800 frequency bands in the environment and converts it into direct current.After passing through the DCDC boost circuit(BQ25570),it drives the wireless transceiver front-end circuit module,MSP430 single-chip microcomputer,temperature sensing circuit and other modules to work to achieve wireless sensing and transmission of ambient temperature.The test results show that when the collected RF power is-14dBm,the RF-DC conversion efficiency is higher than 39%,the DC output voltage is higher than 330mV,and the cold start BQ25570 and the tag both work normally.Wireless energy harvesting IoT tags overcome the shortcomings of active tags requiring frequent battery replacement,and thus have high recognition sensitivity,long communication distance,long service life and maintenance-free advantages.And thus they have broad application prospects in the field of cold chain warehousing and logistics.
作者
孙宁宁
刘婷
孙江
章佑鹏
韦涛
SUN Ningning;LIU Ting;SUN Jiang;ZHANG Youpeng;WEI Tao(Unit 93114 of PLA,Beijing 100085,China;University of Electronic Science and Technology of China,Chengdu Sichuan 611731,China;No.30 Institute of CETC,Chengdu Sichuan 610041,China)
出处
《通信技术》
2021年第1期231-237,共7页
Communications Technology
基金
宜宾市科技项目(No.2018ZSF001)
教育部-中国移动科研基金(No.MCM20180104)
中山市智能陈列展示技术工程实验室。
