基于LoRa自组网的电能采集系统设计与实现

为了实现用电设备运行状况的远程监测，需要对设备运行时的电能参数进行采集并上报至云平台。针对上述目的，本项目设计了一种基于LoRa自组网技术的电能采集系统，整个系统主要由数据采集节点和集中器组成。数据采集节点采用RN8209电能计量芯片实现负载电能数据的精确采集，并通过LoRa通信模块将数据发送至集中器。集中器采用了基于NB-IoT通信模块和LoRa通信模块的双模组设计，通过LoRa模块接收节点上报的数据，并通过NB-IoT模块转发至物联网云平台。本系统利用LoRa载波侦听技术设计了基于CSMA/CA的星型自组网络，实现了节点与集中器间的无线通信，适用于低成本、小规模的远程电能数据采集系统。通过实验验证，该方案的数据采集功能、LoRa自组网通信功能和NB-IoT通信功能均能够正常实现，达到了设计目标。

Design and implementation of power collection system based on LoRa ad hoc network

In order to realize the remote monitoring of the running status of the electrical equipment, it is necessary to collect and report the power data of the equipment during operation to the cloud platform. For the above purpose, this project designs a power acquisition system based on LoRa ad hoc network technology. The whole system is mainly composed of data acquisition nodes and concentrators. The data acquisition node uses the RN8209 power metering chip to accurately collect the load power data, and sends the data to the concentrator through the LoRa communication module.The concentrator adopts a dual-module design based on the NB-IoT communication module and the LoRa communication module. It receives the data reported by the node through the LoRa module, and forwards it to the IoT cloud platform through the NB-IoT module. This system uses LoRa carrier sense technology to design a star-shaped ad hoc network based on CSMA/CA, which realizes wireless communication between nodes and concentrators, and is suitable for low-cost, small-scale remote power data acquisition systems. Through the experimental verification, the data acquisition function, LoRa ad hoc network communication function and NB-IoT communication function of the scheme can be realized normally, and the design goals have been achieved.