【摘要】：本文重點(diǎn)闡述了基于CAN總線(xiàn)的智能微噴灌監(jiān)控系統(tǒng)中下位機(jī)(智能節(jié)點(diǎn))的硬件電路組成及軟件程序的設(shè)計(jì)。此微噴灌控制系統(tǒng)既可以實(shí)現(xiàn)所需的控制功能和要求,并且物美價(jià)廉,操作簡(jiǎn)單,適用性廣,有很高的性?xún)r(jià)比。利用直接推理法和模糊邏輯工具及模塊完成對(duì)土壤層濕度模糊控制器的建模和仿真驗(yàn)證。硬件電路主要由I/O接口電路、按鍵電路、數(shù)據(jù)采集電路、時(shí)鐘電路、輸入輸出控制電路以及存儲(chǔ)電路等構(gòu)成。實(shí)際應(yīng)用中,根據(jù)管理要求和控制成本,用戶(hù)可以選擇不同的控制方式,并決定是否配選相應(yīng)的土壤層水分傳感器,實(shí)現(xiàn)靈活、實(shí)用的系統(tǒng)配置;該系統(tǒng)已在婁底職院農(nóng)林工程系苗圃園進(jìn)行了試運(yùn)行,運(yùn)行情況良好,為大型、遠(yuǎn)程控制網(wǎng)絡(luò)的實(shí)現(xiàn)奠定了研究基礎(chǔ)。主要研究?jī)?nèi)容有:(1)根據(jù)按需噴灌的原理,系統(tǒng)地研究作物需水量的計(jì)算方法,將參考作物蒸發(fā)量參數(shù)估算模型用于本系統(tǒng)噴灌補(bǔ)給水量的計(jì)算中,通過(guò)將易于獲取的環(huán)境參數(shù)的收集,精確計(jì)算作物的蒸發(fā)量,從而科學(xué)指導(dǎo)噴灌操作過(guò)程,有效地調(diào)節(jié)土壤層環(huán)境的水分狀況。(2)結(jié)合區(qū)域內(nèi)現(xiàn)有條件,根據(jù)土壤層的特性,從系統(tǒng)功能要求出發(fā),把系統(tǒng)分為五個(gè)模塊,進(jìn)而確定系統(tǒng)的總體結(jié)構(gòu),并按成本核算、可靠程度、功耗等設(shè)計(jì)原則,分別設(shè)計(jì)基于STC89C52微處理器和SJA1000芯片的CAN總線(xiàn)適配控制器的數(shù)據(jù)采集的模塊、控制執(zhí)行模塊和數(shù)據(jù)處理模塊的硬件和軟件系統(tǒng)。(3)基于模塊設(shè)計(jì)思想理念,進(jìn)行各功能模塊的CAN總線(xiàn)通信設(shè)計(jì),對(duì)接收現(xiàn)場(chǎng)控制器各項(xiàng)輸出控制信息及當(dāng)前的狀態(tài)信息,進(jìn)行分析處理,從而實(shí)現(xiàn)對(duì)系統(tǒng)的實(shí)時(shí)在線(xiàn)控制。通過(guò)測(cè)試運(yùn)行效果檢測(cè)系統(tǒng)的整體功能和穩(wěn)定性。
[Abstract]:This paper focuses on the hardware circuit composition and software design of the intelligent micro-sprinkler monitoring system based on CAN bus. The micro sprinkler irrigation control system can not only achieve the required control functions and requirements, but also has the advantages of good quality and low cost, simple operation, wide applicability and high performance to price ratio. Using direct inference method and fuzzy logic tools and modules, the modeling and simulation of soil layer moisture fuzzy controller are completed. The hardware circuit is mainly composed of I / O interface circuit, keystroke circuit, data acquisition circuit, clock circuit, input and output control circuit and storage circuit. In practical application, according to the management requirements and control costs, the user can choose different control methods, and decide whether to choose the corresponding soil layer moisture sensor to achieve flexible and practical system configuration; The system has been put into trial operation in Nursery Garden of Agriculture and Forestry Engineering Department of Loudi Vocational College, which has laid a research foundation for the realization of large-scale and remote control network. The main research contents are as follows: (1) according to the principle of sprinkler irrigation on demand, the calculation method of crop water demand is systematically studied, and the estimation model of reference crop evaporation parameters is applied to the calculation of sprinkler recharge water in this system. By collecting the easily acquired environmental parameters, accurately calculating the evaporation of crops, thus scientifically guiding the operation process of sprinkler irrigation and effectively regulating the water state of the soil layer environment. (2) according to the characteristics of the soil layer, combined with the existing conditions in the region, According to the requirement of system function, the system is divided into five modules, and then the overall structure of the system is determined, and according to the design principles of cost accounting, reliability, power consumption, etc. The data acquisition module of CAN bus adaptor controller based on STC89C52 microprocessor and SJA1000 chip is designed, and the hardware and software system of control module and data processing module are designed. (3) based on the idea of module design, The CAN bus communication design of each function module is carried out, and the output control information and current state information of the field controller are analyzed and processed, so as to realize the real-time on-line control of the system. The whole function and stability of the system are tested.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類(lèi)號(hào)】：S275.5;TP277

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