应用LoRa构建二级组网抄表系统
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摘要
针对国内现有抄表系统存在的通信距离短,路由复杂等局限和不足,提出了一种基于LoRa扩频技术构建的二级组网抄表系统。该系统采用星型拓扑网络结构,其中采集器负责用户数据的采集并通过LoRa调制给集中器,集中器间歇性唤醒采集器并把采集的数据通过GPRS上传到服务器。系统软件采用分时任务调度器和四层通信协议。实际通过对终端设备测试,该系统具有目前流行的基于Wifi以及Zig Bee方案所不具备的远程传输能力以及低功耗特性,且两级星型网络结构简单,组网可靠性高。
Aiming at the limitation and insufficiency of the communication distance and the complexity of the existing meter reading system a two-tier network meter reading system based on Lora wireless module is proposed. The system adopts star topology network structure, in which the collector is responsible for the collection of user data and through Lora modulation to concentrator, the concentrator collects data intermittently and uploads it to the server through GPRS. The system software adopts time-sharing task scheduler and four layer communication protocol. The practical application shows that the system has the capability of remote transmission, which is not available based on Wi Fi and Zig Bee scheme, and has very strong anti-interference ability, and the two star network has simple structure and high reliability.
Aiming at the limitation and insufficiency of the communication distance and the complexity of the existing meter reading system a two-tier network meter reading system based on Lora wireless module is proposed. The system adopts star topology network structure, in which the collector is responsible for the collection of user data and through Lora modulation to concentrator, the concentrator collects data intermittently and uploads it to the server through GPRS. The system software adopts time-sharing task scheduler and four layer communication protocol. The practical application shows that the system has the capability of remote transmission, which is not available based on Wi Fi and Zig Bee scheme, and has very strong anti-interference ability, and the two star network has simple structure and high reliability.
引文
[1]沈曙明.无线远程集抄系统[D].南京:南京理工大学,2014.
[2] KORTUEM G,KAWSAR F,SUNDRAMOORTHY V,et al. Smart objects as building blocks for the internet of things[J]. IEEE Internet Computing,2009,14(1):44-51.
[3]王传军,杜海强,韩利明,等.基于RS485和LAN的远程抄表系统的应用[J].科技创新与应用,2011(24):36.
[4] PALANIAPPAN S,ASOKAN R,BHARATHWAJ S,et al. Automated meter reading system-a study[J]. International Journal of Computer Applications,2015,116(18):39-46.
[5]杨顺,李明明.基于ARM和Wi Fi技术的远程自动抄表系统设计[J].计算机测量与控制,2013,21(11):3068-3071.
[6]任旭虎,李慧娟.基于Zig Bee的无线录井低功耗传感网络设计[J].仪表技术与传感器,2016(6):69-71
[7] CORRAL P,CORONADO B,LIMA A C D C,et al. Design of automatic meter reading based on zigbee[J]. IEEE Latin America Transactions,2012,10(1):1150-1155.
[8]何此昂,邓颖.Microchip PIC24系列单片机原理与程序设计[M].北京:人民邮电出版社,2011.
[9] BOR M,VODLER J,RPEDOIG U. Lo Ra for the internet of things[C]//International Conference on Embedded Wireless Systems and Networks. Junction Publishing,2016:361-366.
[10] STEVENS W R. TCP/IP illustrated(vol. 3):TCP for transactions,HTTP,NNTP, and the Unix domain protocols[M].北京:人民邮电出版社,2016.
[11] NUMAO M, MORISHITA S. Cooperative scheduling and its application to steelmaking processes[J]. IEEE Transactions on Industrial Electronics,1991,38(2):150-155.
[12]庞特.时间触发嵌入式系统设计模式[M].北京:中国电力出版社,2004.
[2] KORTUEM G,KAWSAR F,SUNDRAMOORTHY V,et al. Smart objects as building blocks for the internet of things[J]. IEEE Internet Computing,2009,14(1):44-51.
[3]王传军,杜海强,韩利明,等.基于RS485和LAN的远程抄表系统的应用[J].科技创新与应用,2011(24):36.
[4] PALANIAPPAN S,ASOKAN R,BHARATHWAJ S,et al. Automated meter reading system-a study[J]. International Journal of Computer Applications,2015,116(18):39-46.
[5]杨顺,李明明.基于ARM和Wi Fi技术的远程自动抄表系统设计[J].计算机测量与控制,2013,21(11):3068-3071.
[6]任旭虎,李慧娟.基于Zig Bee的无线录井低功耗传感网络设计[J].仪表技术与传感器,2016(6):69-71
[7] CORRAL P,CORONADO B,LIMA A C D C,et al. Design of automatic meter reading based on zigbee[J]. IEEE Latin America Transactions,2012,10(1):1150-1155.
[8]何此昂,邓颖.Microchip PIC24系列单片机原理与程序设计[M].北京:人民邮电出版社,2011.
[9] BOR M,VODLER J,RPEDOIG U. Lo Ra for the internet of things[C]//International Conference on Embedded Wireless Systems and Networks. Junction Publishing,2016:361-366.
[10] STEVENS W R. TCP/IP illustrated(vol. 3):TCP for transactions,HTTP,NNTP, and the Unix domain protocols[M].北京:人民邮电出版社,2016.
[11] NUMAO M, MORISHITA S. Cooperative scheduling and its application to steelmaking processes[J]. IEEE Transactions on Industrial Electronics,1991,38(2):150-155.
[12]庞特.时间触发嵌入式系统设计模式[M].北京:中国电力出版社,2004.