應用于溫室大棚智能監(jiān)控系統(tǒng)的WSN設計與實現
本文選題:溫室大棚 切入點:智能監(jiān)控 出處:《杭州電子科技大學》2017年碩士論文
【摘要】:隨著射頻通信技術與傳感器技術的發(fā)展,無線傳感器網絡(WSN)在智慧農業(yè)中的應用成為當下備受關注的熱門研究領域之一。溫室大棚是農業(yè)生產中重要的基礎設施,其發(fā)展狀況直接體現著農業(yè)生產力水平。通過無線傳感器網絡,自動監(jiān)測溫室大棚的環(huán)境參數,以達到適合作物生長的最優(yōu)化設置,可以有效提升農業(yè)生產效率和質量。本文從實際應用出發(fā),提出了應用于溫室大棚智能監(jiān)控系統(tǒng)的無線傳感器網絡設計與實現,F有的無線網絡協議棧,如WIFI、ZigBee、Bluetooth等,對微處理器和無線芯片有較高的性能要求,導致搭建無線傳感器網絡的硬件成本高。本文設計了一種新型輕量級無線通信協議棧,使其可以運行于低端處理器,同時降低對無線通信設備的要求,達到減少構建無線傳感器網絡硬件成本的目的。本文設計了溫室大棚智能監(jiān)控系統(tǒng)總體架構與采集器、中繼器、基站的具體實現方式。采集器通過SHT10、BH1750、MG811等傳感器采集空氣溫濕度、光照強度、CO_2濃度等環(huán)境參數,以無線方式上傳到中繼器。中繼器主要起數據轉發(fā)的作用,向上轉發(fā)業(yè)務數據,向下轉發(fā)控制命令。中繼器基于STM32平臺,搭載FreeRTOS嵌入式實時操作系統(tǒng),具備多網卡功能,通過CC2510與采集器通信,2.4GHz無線通信具有更快的傳輸速率;通過SX1278與基站進行通信,在433MHz頻段采用LoRa擴頻技術使其擁有更遠的傳輸距離。基站對數據進行解析存儲等工作,通過GPRS定時向遠程服務器上傳數據。服務器的數據中心平臺對數據進行統(tǒng)一管理,可查詢節(jié)點狀態(tài)或下發(fā)控制命令。本論文主要闡述嵌入式軟件設計,包括輕量級無線通信協議棧設計,以及采集器、中繼器、基站的程序流程設計。測試結果表明,自主設計的輕量級無線通信協議棧具有代碼量小、占用內存少、硬件兼容性高、可移植性強等特點,有助于構建低成本無線傳感器網絡。本文設計的溫室大棚智能監(jiān)控系統(tǒng)行之有效,軟硬件開發(fā)成本較低,實用性強,在智慧農業(yè)領域具有良好的應用前景。
[Abstract]:With the development of radio frequency communication technology and sensor technology, the application of wireless sensor network (WSN) in intelligent agriculture has become one of the hot research fields. Greenhouse greenhouse is an important infrastructure in agricultural production. Its development directly reflects the level of agricultural productivity. Through wireless sensor networks, the environmental parameters of greenhouse are automatically monitored in order to achieve the optimal setting suitable for crop growth. This paper presents the design and implementation of wireless sensor network used in greenhouse intelligent monitoring system. The existing wireless network protocol stack, such as WiFi ZigBeeBluetooth, is used to improve the efficiency and quality of agricultural production. This paper designs a new lightweight wireless communication protocol stack, which can run on the low-end processor, because of the high performance requirement of microprocessor and wireless chip, which leads to the high hardware cost of building wireless sensor network. At the same time, the requirement of wireless communication equipment is reduced to reduce the hardware cost of building wireless sensor network. This paper designs the whole architecture, collector and repeater of intelligent monitoring system in greenhouse. The specific implementation mode of the base station. The collector collects the environmental parameters such as air temperature and humidity, illumination intensity and CO2 concentration through sensors such as SHT10H1750MG811, and uploads them to the repeater wirelessly. The repeater mainly plays the role of data forwarding and forwards the service data up. The repeater is based on STM32 platform, runs FreeRTOS embedded real-time operating system, has the function of multi-network card, communicates with the collector through CC2510 and has a faster transmission rate of 2.4GHz wireless communication, and communicates with the base station through SX1278. In the 433MHz band, LoRa spread spectrum technology is adopted to make it have longer transmission distance. The base station analyzes and stores the data, uploads the data to the remote server periodically through GPRS. The data center platform of the server manages the data uniformly. This paper mainly describes embedded software design, including lightweight wireless communication protocol stack design, as well as the collector, repeater, base station program flow design. The test results show that, The self-designed lightweight wireless communication protocol stack has the characteristics of small code, less memory, high hardware compatibility, strong portability, etc. The intelligent monitoring system designed in this paper is effective, the development cost of hardware and software is relatively low, the practicability is strong, and it has a good application prospect in the field of intelligent agriculture.
【學位授予單位】:杭州電子科技大學
【學位級別】:碩士
【學位授予年份】:2017
【分類號】:TN929.5;TP212.9;TP277
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