本文關鍵詞：基于ZigBee無線傳感器網(wǎng)絡的溫室測控系統(tǒng)設計　出處：《青島科技大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 無線傳感器網(wǎng)絡 ZigBee協(xié)議 模糊控制 溫室測控系統(tǒng) 云計算

【摘要】：溫室種植是設施農(nóng)業(yè)的重要構成部分,現(xiàn)有的大部分溫室測控系統(tǒng)依然采用有線傳輸,該方式存在著難以布線、難以維修等缺點。即使是采用無線傳輸方式的溫室測控系統(tǒng)也存在著功能簡單、擴展性差、控制精度低等缺點。物聯(lián)網(wǎng)、無線傳感器網(wǎng)絡的出現(xiàn)促進了農(nóng)業(yè)現(xiàn)代化與信息化、自動化的融合,加快了農(nóng)業(yè)由傳統(tǒng)生產(chǎn)模式向智慧生產(chǎn)模式轉變。具有成本低、功耗低、自組織等特征的ZigBee協(xié)議,特別適合應用于短距離低速率數(shù)據(jù)傳輸?shù)臒o線傳感器網(wǎng)絡中。文本在分析了國內(nèi)外溫室監(jiān)測控制系統(tǒng)的發(fā)展情況和中國農(nóng)業(yè)生產(chǎn)的實際情況后,開發(fā)了基于ZigBee無線傳感器網(wǎng)絡的溫室測控系統(tǒng)。本系統(tǒng)根據(jù)功能分為傳感層、網(wǎng)絡層和應用層,并對傳感層和應用層進行了設計。傳感層為具有星型拓撲結構的無線傳感器網(wǎng)絡,通過ZigBee協(xié)議組播的方式進行信啟、的傳輸。采用模塊化的思想對節(jié)點進行硬件設計,針對溫室內(nèi)黃瓜的生長需求選擇數(shù)字型溫濕度、二氧化碳、光照強度傳感器等作為感知模塊；CC2530作為控制模塊和無線通信模塊；低壓差線性穩(wěn)壓器提供電源管理功能；采用定時器加中斷的方式產(chǎn)生脈沖寬度調(diào)制信號,從而對控制設備進行控制；CH340T芯片完成異步串行通訊協(xié)議與通用串行總線協(xié)議的變換,保證數(shù)據(jù)傳輸?shù)臏蚀_性。對節(jié)點的工作流程以及數(shù)據(jù)凈荷的結構進行了設計,為協(xié)調(diào)節(jié)點進行數(shù)據(jù)融合做好鋪墊。應用層為運用Visual Studio 2010集成開發(fā)環(huán)境和Sql Server 2008數(shù)據(jù)庫管理軟件開發(fā)的基于客戶機／服務器架構的監(jiān)測控制系統(tǒng),具有數(shù)據(jù)顯示、參數(shù)設置、信息發(fā)布等功能,并對數(shù)據(jù)庫和數(shù)據(jù)凈荷的結構進行了設計。采用按需配置的云服務器,提高了系統(tǒng)的運算能力、可擴展性、安全性和可靠性。本溫室測控系統(tǒng)集溫室測控、天氣預報、農(nóng)業(yè)技術發(fā)布等功能于一體,為用戶提供了一個農(nóng)業(yè)物聯(lián)網(wǎng)整體解決方案。溫室內(nèi)溫濕度存在耦合度高、延時大、非線性等特點,無法得劍準確的數(shù)學模型,不適合采用傳統(tǒng)的控制算法。而模糊控制根據(jù)專家經(jīng)驗進行模糊推理,不需要精確的數(shù)學模型就可達到精確控制的效果。本文將模糊控制和模糊補償解耦算法應用到溫室測控系統(tǒng)中有效解決了溫室內(nèi)溫濕度存在的問題,獲得了較高的控制精度。
[Abstract]:Greenhouse cultivation is an important part of facility agriculture. Most of the existing greenhouse monitoring and control systems still use wired transmission, which has many shortcomings such as difficult wiring and hard maintenance. Even the greenhouse measurement and control system with wireless transmission also has the disadvantages of simple function, poor scalability and low control precision. The emergence of Internet of things and wireless sensor network has promoted the integration of agricultural modernization and informatization and automation, and accelerated the transformation from traditional production mode to intelligent production mode. The ZigBee protocol, with low cost, low power consumption and self-organization, is especially suitable for wireless sensor networks which are used for short range and low rate data transmission. After analyzing the development of greenhouse monitoring and control system and the actual situation of agricultural production in China, a greenhouse monitoring and control system based on ZigBee wireless sensor network is developed. The system is divided into sensing layer, network layer and application layer according to the function, and the sensing layer and application layer are designed. The sensor layer is a wireless sensor network with a star topology, which is transmitted through ZigBee protocol multicast. Using the idea of modular hardware design of node, according to the demand growth of Cucumber in greenhouse selection of digital temperature and humidity, carbon dioxide, light intensity sensor as the sensing module; CC2530 as control module and wireless communication module; low dropout linear regulator provides power management function; using the timer and interrupt way to generate a pulse width modulation signal thus, control of the control device; CH340T chip asynchronous serial communication protocol and USB protocol transformation, to ensure the accuracy of data transmission. The work flow of the node and the structure of the data payload are designed to paving the data for the coordination nodes. The application layer monitoring client / server architecture control system based on the use of Visual Studio 2010 integrated development environment and Sql Server 2008 database management software, with data display, parameter setting, information release and other functions, and database and data payload structure design. The use of on-demand cloud servers improves the computing power, scalability, security and reliability of the system. The greenhouse monitoring and control system integrates functions of greenhouse monitoring, weather forecasting and agricultural technology release, providing users with an overall solution of Agricultural Internet of things. Temperature and humidity are high degree of coupling, time-delay, nonlinear, accurate mathematical model of the sword can not suitable for use, the traditional control algorithm. And fuzzy control is based on the expert's experience to make fuzzy reasoning, and the exact control effect can be achieved without the need of accurate mathematical model. In this paper, fuzzy control and fuzzy compensation decoupling algorithm is applied to the greenhouse control system effectively solves the problems of greenhouse temperature and humidity, get a higher control precision.
【學位授予單位】：青島科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S625;TN92;TP212.9

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本文編號：1342710