集成LoRa与BDS的应急环境监测数据获取与传输技术

Data Collection and Transmission Technology for Emergency Environment Monitoring Based on Integration of LoRa and BDS

    摘要
  • 摘要: 针对灾后快速应急响应体系中常规无线传感网节点间通信距离短及前后端远程通信过分依赖地面基站的问题，设计并实现了基于远程无线传输技术(long range wireless transmission technology，LoRa)与北斗卫星导航系统(BeiDou navigation satellite system，BDS)的应急环境监测系统。该系统将无人机作为应急设备的承载平台，通过中继节点将采集的环境参数传递给搭载北斗模块的网关节点。经由BDS，用户可使用手持应急终端实时获取并接收所采集的环境监测数据。测试结果表明，该系统在通信间距为8 km的条件下，实现了不同环境中数据的实时采集与可靠传输，城区测试环境下北斗短报文丢包率仅为7.450%，山区测试环境下为18.395%，因此在常规通信网络缺失或阻断条件下具有一定的应用价值。

     

    Abstract:
      Objectives  The existed problems of post-disaster rapid emergency response system include the short communication distance between nodes in conventional wireless sensor networks, and the over-reliance on ground stations for front-end and back-end long-distance communication.
      Methods  The emergency environment monitoring system based on long range wireless transmission technology and BeiDou navigation satellite system (BDS) is designed and developed. The proposed system takes unmanned aerial vehicle as bearing platform of emergency devices, and the collected environmental parameters are transferred through the relay nodes to the gateway nodes equipped with BDS modules. Users can use the hand-held emergency terminal to acquire and receive the collected environmental monitoring data in real time.
      Results  The results show that the proposed system can realize real-time data collection and reliable transmission in different environments with the communication distance of 8 km. The packet loss rates of short message in urban area and in mountainous area are 7.450% and 18.395%, respectively.
      Conclusions  The proposed system has certain application value for complete or partial absence of conventional communication network.

     

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