地下LoRa无线传感器网络的传输测试系统研究

摘要

[目的]以智能手机为核心,研制成本低、使用简单的面向LoRa地下无线数据传输的测试系统.[方法]该测试系统由安装了测试用的App智能手机和与之匹配的地下测试节点组成.利用该系统进行场景测试,测定影响土壤中LoRa无线数据传输效果的因素并讨论对应的数据传输方法.[结果]测试结果表明,该系统运行可靠、使用方便灵活,LoRa 低功耗广域网技术亦可以较为可靠地满足土壤介质中的无线传感器网络数据传输需求.[结论]本系统可为未来地下LoRa无线传感器网络的工程应用提供相应的测试手段.%[Objective]To develop a low-cost and simple operational system based on a smartphone for measuring the transmission of LoRa wireless undergroud data.[Method]The measurement system consisted of a smartphone with test App installed and its matching underground test nodes. Scene measurements were carried out with this system. The factors affecting the LoRa wireless data transmission in soil were determined, and the corresponding data transmission methods were discussed.[Result]The test results showed that the system was reliable and easy to operate, and LoRa low-power wide-area network technology could meet the data transmission requirements of wireless underground sensor networks in soil.[Conclusion]The system is expected to provide the appropriate testing method for the engineering application of LoRa wireless underground sensor networks in the future.