【正文】 信，采用主從方式在風(fēng)格和應(yīng)答器是采用的過(guò)程。子機(jī)的溫度、濕度和二氧化碳的硬件模塊主要是完成讀取I2C濃度的二氧化碳濃度、溫度和濕度，測(cè)量數(shù)據(jù)和電流控制上傳狀態(tài)到主機(jī)電腦，接受模糊控制指令從主機(jī)輸出執(zhí)行指令。這個(gè)配置軟件具有可靠性高，開(kāi)發(fā)周期短，完美的圖形界面生成能力，以及友好的人機(jī)交互，可以按照創(chuàng)建動(dòng)態(tài)圖像和圖表可以直觀地顯示設(shè)備的布局場(chǎng)景中的參數(shù)，控制狀態(tài)的變化，并能發(fā)出報(bào)警信號(hào)，當(dāng)超過(guò)額定值，可以實(shí)現(xiàn)模糊控制的溫室參數(shù)使用的特定數(shù)據(jù)庫(kù)中存儲(chǔ)的歷史環(huán)境參數(shù)曲線(xiàn)并采用農(nóng)業(yè)專(zhuān)家系統(tǒng)。在這個(gè)系統(tǒng)中，分區(qū)節(jié)點(diǎn)為了簡(jiǎn)化控制、灌溉技術(shù)，采用控制土壤水分技術(shù)。以同軸傳輸線(xiàn)作為無(wú)損耗均勻線(xiàn)，波阻抗為Z0，ZL是負(fù)載阻抗。然后，ε≈ε∞，虛部的土壤波阻抗忽視，只有真正的一部分，這相當(dāng)于一個(gè)純電阻。ε是介質(zhì)的介電常數(shù)，λ是介質(zhì)電導(dǎo)率。輸出電路包括光學(xué)隔離、信號(hào)驅(qū)動(dòng)，輸出繼電器。它的測(cè)量范圍為0?200000勒克斯。0％RH，溫度測(cè)量精度為177。新的智能傳感器SHT11基于選擇CMOSens技術(shù)測(cè)量溫度和濕度。，照明度和CO2濃度每個(gè)控制單元包括供應(yīng)鏈管理（SCM），傳感器，信號(hào)處理電路，RS485接口和輸出環(huán)節(jié)。在這種分布式系統(tǒng)中，通信是關(guān)鍵。在秦皇島農(nóng)村大棚。下部是由一系列不同功能的模塊，并且在每個(gè)模塊中，一個(gè)單一的芯片作為下位機(jī)采用AT89C52，RS485則用于與所有AT89C52 PC進(jìn)行通信，然后實(shí)現(xiàn)收集，處理和控制的溫室參數(shù)。二，系統(tǒng)結(jié)構(gòu)及原理最顯著的特點(diǎn)是分配和智能控制系統(tǒng)溫室相結(jié)合，這將作為一個(gè)整體，模塊組合結(jié)構(gòu)簡(jiǎn)單，方便的人機(jī)交互與數(shù)據(jù)采集，控制和管理，并采用模糊控制技術(shù)的智能專(zhuān)家，可以組成適應(yīng)多種作物管理控制的溫室。近10年的不懈努力，我們的研究團(tuán)隊(duì)在農(nóng)業(yè)環(huán)境參數(shù)的測(cè)量和控制系統(tǒng)上，設(shè)計(jì)了一個(gè)智能測(cè)量和控制系統(tǒng)相分布結(jié)合的溫室，可以在廣大農(nóng)村地區(qū)適用。每個(gè)監(jiān)測(cè)和控制模塊包括STC12系列的微控制器、傳感器、繼電器等等。can visually display the changes of parameters,control status,and can give an alarm when overlimited。ε is medium dielectric constant。spectral range is 400~700(nm) visible light。and considering the operation of configuration software,it is required that memory is 64M or above and hard disk is 10Gb or above.B. The control modules of temperature and humidity,illuminance and CO2 concentrationEach control unit consists of SCM,sensors,signal processing circuit,RS485 interface and output hardware structure of module of temperature and humidity,CO2 concentration is shown in .CO2 concentration is measured by sensor based on NDIR technology,measurement is of 0~2 the sensor,control system,by software of digital filter,linear interpolation and temperature pensation,the CO2 concentration is output as digital adhered to UART protocol,and then is input directly to the SCM.The new intelligent sensor of SHT11 based on CMOSens technology is chosen in the measurement of temperature and SHT11,the temperature and humidity sensors,signal amplification,A/D,I2C bus are all integrated in a chip。 the lower is posed of a series of modules of different function,and in each module,a single chip of AT89C is adopted as the lower machine,RS485 is used to municate PC with all AT89C,and then the collection,processing and control of the greenhouse parameters is function module is pletely isolated in electrical,any failure on the nodule does not produce any effect on other system collects separately ways of environment information through each monitoring and control module,and sends it to host PC through the RS485 in the PC configuration control system,the acquired parameters are pared with the values of setting,then according to a variety of expert intelligent fuzzy control system of crops at different growth stages,the fuzzy control instructions on the environment temperature,humidity,CO2 concentration,soil water content and the corresponding operation instructions or alarm are given.The system is applied in rural greenhouses in at 1/4 near East and West end in a greenhouse,and at the height of from the ground in the middle in the northern half (near the wet curtain) and the southern half (near the fan ),a module of air temperature and humidity ,CO2 concentration and a module of soil moisture content are set。and of PC,it has a large amount of data storage,rich software,convenient humanputer interaction,and so we use outdated and lowpriced PC,taking the PC as the upper machine,taking the different function control modules posed of multiple microputers as the lower machines,then a masterslave distributed and intelligent control system bases on microputer is made up,by which both better monitoring and control,display and data collection or management are achieved,but also lower cost of system is get according to the actual need.II SYSTEM STRUCTURE A