河北理工大学信息学院
摘要
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基于单片机和Lora的地铁轨道监测系统
摘要
地铁作为城市公共交通的骨干网络，运行安全问题相当重要，隧道环境特殊，存在温度异常、有害气体积累等安全隐患，建立可靠的环境监测系统对保障行车安全有重要性。传统有线监测系统在地铁隧道环境时，布线困难、维护复杂且成本高昂等问题就存在，本文设计了一种基于LoRa技术的地铁隧道监测系统，利用LoRa通信低功耗、远距离传输的特性，传统监测系统的局限性可就解决。STM32F103单片机为核心构建了数据采集端，同时结合了DS18B20温度传感器、MQ-2烟雾传感器和MQ-7可燃气体传感器，数据通过LoRa无线通信技术传输至控制端，并借助WiFi模块上传至云平台，地铁隧道环境的远程监测与报警功能实现，实验显示，较高的可靠性与稳定性在系统中存在，地铁隧道环境监测需求能够满足。
关键词地铁隧道监测；LoRa技术；单片机；无线传感器网络；环境参数监测
Abstract
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Abstract
Asthebackbonenetworkofurbanpublictransport,subwayoperationsafetyisveryimportant.Thetunnelenvironmentisspecial,andtherearesafetyhazardssuchasabnormaltemperatureandharmfulgasaccumulation.Itisimportanttoestablishareliableenvironmentalmonitoringsystemtoensurethesafetyofdriving.Whenthetraditionalwiredmonitoringsystemisinthesubwaytunnelenvironment,thereareproblemssuchasdifficultwiring,complexmaintenanceandhighcost.ThispaperdesignsasubwaytunnelmonitoringsystembasedonLoratechnology.Usingthecharacteristicsoflowpowerconsumptionandlong-distancetransmissionofLoracommunication,thelimitationsofthetraditionalmonitoringsystemcanbesolved.STM32F103microcontrollerisusedasthecoretobuildthedataacquisitionterminal,whichcombinestheDS18B20temperaturesensor,mq-2smokesensorandmq-7combustiblegassensor.ThedataistransmittedtothecontrolterminalthroughLorawirelesscommunicationtechnology,anduploadedtothecloudplatformwiththehelpofWiFimodule.Theremotemonitoringandalarmfunctionofthesubwaytunnelenvironmentisrealized.Theexperimentshowsthathighreliabilityandstabilityexistinthesystem,andthesubwaytunnelenvironmentmonitoringrequirementscanbemet.
Keywordssubwaytunnelmonitoring;Loratechnology;Singlechipmicrocomputer;Wirelesssensornetwork;Environmentalparametermonitoring
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