【摘要】：發(fā)展農(nóng)業(yè)是實現(xiàn)農(nóng)民增加人均收入,提高農(nóng)民科技技術(shù)和農(nóng)產(chǎn)品高質(zhì)優(yōu)產(chǎn),滿足社會需求的重要舉措。溫室控制系統(tǒng)研究是農(nóng)業(yè)現(xiàn)代化發(fā)展的重要研究內(nèi)容,建立一套精度較高、適用性好、安全可靠的溫室控制系統(tǒng)已成為迫切需求。首先,針對在傳統(tǒng)溫室控制系統(tǒng)溫室參數(shù)監(jiān)測中有線通信的方式存在著布線困難、投資成本高和安裝維護難等問題,本文將采用低功耗、成本低、時延短、安全性好的ZigBee無線網(wǎng)絡(luò)技術(shù),實現(xiàn)溫室環(huán)境參數(shù)的可靠傳輸。針對溫室控制系統(tǒng)是一個具有時變性、非線性、時滯性、耦合性等特點的多參數(shù)復(fù)雜控制系統(tǒng),存在精確數(shù)學(xué)模型建立困難和難以實現(xiàn)精準(zhǔn)控制等問題,本文在模糊PID控制的基礎(chǔ)上引入灰色預(yù)測理論,提出溫室參數(shù)的灰色趨勢預(yù)測模糊PID控制解決方案,做到超前控制,克服時滯現(xiàn)象,提高系統(tǒng)穩(wěn)定性和快速性,利用改進的灰色趨勢預(yù)測模型,進一步減小預(yù)測誤差,提高控制精度和系統(tǒng)響應(yīng)速度。通過MATLAB仿真對模糊PID、灰色模糊PID控制和改進的灰色模糊PID控制的比較分析,證明控制解決方案是可行的。本文在溫室控制系統(tǒng)的設(shè)計中,以CC2530芯片為核心,構(gòu)建ZigBee無線網(wǎng)絡(luò),并以PLC為主控制器完成執(zhí)行機構(gòu)的聯(lián)動控制,利用MCGS組態(tài)軟件完成上位機設(shè)計,可通過數(shù)據(jù)查詢、曲線顯示和報警等功能即時掌握生長環(huán)境狀態(tài),來實現(xiàn)對溫室系統(tǒng)的實時監(jiān)控和管理。溫室控制系統(tǒng)能夠滿足農(nóng)作物生長環(huán)境的預(yù)期要求,同時實現(xiàn)高效節(jié)能,具有較高的推廣應(yīng)用價值,為“互聯(lián)網(wǎng)+”現(xiàn)代農(nóng)業(yè)的精準(zhǔn)控制提供了一條有效途徑。
[Abstract]:The development of agriculture is an important measure to increase the per capita income of farmers, improve farmers' science and technology and high quality of agricultural products, and meet the needs of society. The study of greenhouse control system is an important research content in the development of agricultural modernization. It has become an urgent need to establish a set of greenhouse control system with high precision, good applicability and safety and reliability. First of all, aiming at the difficulties of wiring, high investment cost and difficult installation and maintenance in the way of wired communication in the greenhouse parameter monitoring of the traditional greenhouse control system, this paper will adopt low power consumption, low cost, short delay, and so on. ZigBee wireless network technology with good security realizes the reliable transmission of greenhouse environmental parameters. The greenhouse control system is a multi-parameter complex control system with the characteristics of time-varying, nonlinear, time-delay and coupling. It is difficult to establish accurate mathematical model and difficult to achieve accurate control. On the basis of fuzzy PID control, the grey prediction theory is introduced in this paper, and the solution of grey trend prediction fuzzy PID control for greenhouse parameters is put forward in order to achieve advanced control, overcome the phenomenon of time delay, and improve the stability and rapidity of the system. The improved grey trend prediction model is used to further reduce the prediction error and improve the control accuracy and system response speed. Through the comparison and analysis of fuzzy PID, grey fuzzy PID control and improved grey fuzzy PID control by MATLAB simulation, it is proved that the control solution is feasible. In the design of greenhouse control system, ZigBee wireless network is constructed with CC2530 chip as the core, and PLC is used as the main controller to complete the linkage control of executing mechanism. The design of upper computer is completed by MCGS configuration software, which can be queried by data. The function of curve display and alarm can realize the real-time monitoring and management of greenhouse system. Greenhouse control system can meet the expected requirements of crop growth environment, and achieve high efficiency and energy saving. It has higher value of popularization and application, and provides an effective way for accurate control of modern agriculture on the Internet.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP273;S625

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