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1、外文文献AbstractClimate conditions control emphases of automatic control greenhouses introduced from abroad are different from these in home and the introducing and production cost of them is so high ,so it is difficult to popularize and use cosmically .At present, in greenhouses designed and built in h
2、ome itself，the degree of environment control and modern management of most of them is so low ,so they cannot satisfy crops demand for high production and planting all the year; some can only carry out control on partial environment factors without considering mutual affect and coupling of them in th
3、e process of control; some still need manual control;so these factors greatly restrict exertion of economic benefit of greenhouses .Changing traditional modes of control; practicing computer monitoring and establishing greenhouse automatic monitoring system accord with the situation of China have im
4、portant meaning for quickening modern degree of greenhouse production in our country and increasing benefit of greenhouses.Based on summarizing formers researches, the paper analyzes environmental parameters，the integrative control property of greenhouse systems and the control process which is a no
5、nlinear, delay and complicated system; Based on analyzing modes of current greenhouse monitoring systems and properties of single-chip microcomputers, a practical automatic monitoring system for greenhouse environment is designed which can realize the monitoring of every parameter in greenhouse envi
6、ronment by synthetically using sensor technology, fuzzy control theory, communication technology and microcomputer technologyThe system hardware is composed of two parts: a lower-level and a higher- level computer. The higher-level computer is a PC microcomputer which is the headquarter of the syste
7、m and finishes the unified management and control of a greenhouse by way of COM port RS-232 connecting with the lower-level computer. In monitoring environment, the system can finish monitoring for this nonlinear and delay system and realize crops demand for greenhouse environment by using fuzzy con
8、trol theory and technology .The central component of the lower-level computer is 8098 single-chip microcomputer of MCS-96 series, which is used to collect, retreat control and communicate with the higher-level computer.The system software consists of two parts .The higher-level software is developed
9、 by VB and composed of seven modules of setting system parameters, demarcating sensors, ascertaining fuzzy control table, connecting and monitoring real- time data, recurring to history data and help, and each module has certain function and each other is independent from others. The lower-level sof
10、tware is developed by 8098 assemble language and composed of six modules of a main program, a sending and interrupting service program, a receiving and interrupting service program, ascertaining a sampling cycle, connecting data and pretreating data. Simulative experiment shows that the whole system
11、 is convenient to operate，high efficient, easy to expand, has better adaptability and universal property and establishes certain base for realizing control system design with many factors in greenhouse environment. Key words: Automatic control, Greenhouse, Single-chip microcomputer,Computer monitori
12、ng and controlling, Fuzzy control一 Foreword Along with calculator technique of development, the calculator data collect a technique and control the system acquire in the production line automation Extensive of application, it is comprehensive the calculator, data collect, the process control, networ
13、k communication and sketch manifestation etc. technique, With the information obtain, processing, supervision with excellent turn a production line for purpose, have function strong, application vivid, operation squareThen etc. characteristics, have thus extensive of application foreground Gal. Be c
14、lose to more than ten in the last yearses, it F the beginning is to the agriculture research, produce to get The area permeate and promoted tradition agriculture production control mode to calculator imitate, auto control mode change.Especially establish Agriculture of rise and glasshouse cultivatio
15、n technique of expansion, acceleration the calculator is on the agriculture of application stepatl Iasl fttl.Together Hour control theories also along with industry and modern science technique and fly of calculator soon development but experience from“classic control Theories“one“modern control the
16、ories“big system theories“ and“intelligence control theories“ one“misty control theories“ Of a few stage.Misty control theories along with calculator technique of progress and oneself theories of continuously development, at not line Of, complications of hard establishment precision mathematics model of in the system get extensive of application。Glasshouse supervision technique is with auto exa
