基于LoRa的低功耗温度采集传感器系统设计

针对工业高炉冷却水温监测长期运行、维护成本高问题，设计一种基于LoRa(Long Range)的远距离低功耗无线传感器网络系统；系统搭建基于LoRa通信水温采集终端的模块能耗计算模型，通过对计算模型分析，提出了一种基于LoRa协议层的时钟同步协议和时分多址联合优化的无线通信策略；该策略利用LoRa通信技术完成信息交互，实现网关与终端节点的高精度时钟同步；网关完成可对无线资源调度，动态分配终端节点的时隙资源，以实现数据周期性上传，降低数据传输碰撞的概率，并优化无线资源的使用效率；实验表明，该通信策略与ALOHA通信协议相比，显著提高了通信的投递率和能源效率，进一步提高了LoRa在网络中的性能，所提出的联合优化的无线通信策略是有效的。

Design of Low Power Temperature Acquisition Sensor System Based on LoRa

Aiming at the problem of long-term operation and high maintenance cost of industrial blast furnace cooling water temperature monitoring a remote low-power wireless sensor network system based on LoRa Long Range was designed. The system built a module energy consumption calculation model based on LoRa communication water temperature acquisition terminal. Through the analysis of the calculation model a wireless communication strategy based on the clock synchronization protocol of LoRa protocol layer and the joint optimization of time division multiple access was proposed. This strategy used LoRa communication technology to complete information interaction and achieve high-precision clock synchronization between gateway and terminal node. The gateway completed the scheduling of wireless resources and dynamically allocated the timeslot resources of terminal nodes so as to realize the periodic upload of data reduce the probability of data transmission collision and optimize the use efficiency of wireless resources. The experiment showed that this communication strategy significantly improved the delivery rate and energy efficiency of communication compared with ALOHA communication protocol and further improved the performance of LoRa in the network. The jointly optimized wireless communication strategy proposed in this paper is effective.