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    1. A manhole covers intelligent monitoring terminal

      标签：智能监控 RFID 传感

      A manhole covers intelligent monitoring terminal based on dual frequency RFID and acceleration sensor Abstract. For management the manhole cover effectively, the manhole covers intelligent monitoring terminal (MCIMT) based on dual frequency RFID and acceleration sensor was proposed in this paper. Through hardware designing, alarm algorithm designing, program debugging and packaging, we developed the MCIMT. The key performance testing and demonstration system operation shown the following results. Firstly, the MCIMT communication distance can achieve 800 meters under the open conditions and 300 meters under the occluded environment reliably. Secondly, the MCIMT embedded special state estimate algorithm can output the correct scene sate of manhole cover. Thirdly, the MCIMT could operation 3 years in manhole cover. Lastly, the demonstration system based on the MCIMT can alarm accurately and timely

      下载次数 0次 资源类型 学术论文 上传时间 2019-04-09

    2. NB-Iot合LoRa技术对比

      标签：NB-Iot LoRa

      A survey on LPWA technology: LoRa and NB-IoT

      下载次数 3次 资源类型 学术论文 上传时间 2019-04-09

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