外文翻譯--溫室溫度和濕度智能控制系統(tǒng)（英文）

1、Greenhouse Temperature and Humidity Intelligent Control System SUN RONG-GAO, WAN ZHONG, SUN DE-CHAO Department of Computer Zhejiang Wanli University Ningbo, Zhejiang CHINA Abstract: - The article based on embedded da

2、tabase of greenhouse temperature and humidity control system intelligent. Put forward by embedded database system set up in an ideal environment for data greenhouse temperature and humidity control, greenhouse crops in

3、 the process of growth under control. To address the growth of greenhouse crops in the process of temperature and humidity controlled environment is not ideal, at the same time improve the efficiency of control and cos

4、t-effective system. The article focuses on the structure of the control system, hardware, software design and system control strategy. The control system has a simple hardware structure, cost-effective, easy to use and

5、 maintenance, temperature and humidity data, and other advantages of good stability. Key-Words: - Embedded database, Temperature and Humidity, Control ； data filtering, Greenhouse, Microcontrollers 1 Introduction Wi

6、th embedded Microcontrollers technology, intelligent control system is to develop in the direction. The database is the decision-making intelligent control system's core, is the intelligent control foundation.

7、 It needs to store a lot of expertise and examples, but also to constantly update and add real-time data. In order to ensure that greenhouse environment in normal agricultural production and high efficiency, improve

8、the quality and quantity of agricultural products, reducing the labor intensity and energy conservation, the need for greenhouse environment in the temperature and humidity control. Middle-and-low grade products curr

9、ently in control of the greenhouse there are still some technical problems: generally used only for a single set of temperature and humidity control. As the day of crops on the environment of temperature and humidit

10、y requirements not the same, users must frequently adjust the controller settings, it is very difficult to meet the requirements of modern agricultural production. Development of a group of existing greenhouse, low p

11、rices and reliable system of temperature and humidity intelligent control system is necessary. The greenhouse environment is the non-linear, the distribution parameter, time-variable, the long delay, the multivariab

12、le coupling and plurality of controls object system. In the greenhouse cultivates the different crops to need the different habitat. Establishes the greenhouse environment embedded database system's goal in the g

13、reenhouse temperature and humidity control system to lie in: (1) experiences the expert with user's actual need unifies, nimble and the automatic production suits the specific cultivation object the monitoring str

14、ategy; (2) has not provided the cultivation crops which regarding the system the expert experiences, the user may through control system's use operation the way independently establishes the monitoring database,

15、and long-term preservation; (3) the monitoring strategy data which establishes has been possible to carry on the optimization and the revision regarding the system by the user. In the present greenhouse control, on t

16、he one hand the plant culture environment expert experiences the software study serious lag in the greenhouse hardware technology development, simultaneously the greenhouse user tried to find out the plant cult

17、ure experience is unable to enter the control system promptly, this research is helpful to this question solution. 2 Design of an Embedded Database In analyzed had the greenhouse temperature and humidity control en

18、vironmental data and in the database system technology present situation foundation, has designed the crops habitat embedded database. In the design process, utilizes the example parameter - pattern recognition m

19、ethod, summarizes the known data relations semiempirical rule. Will have the basis example parameter - pattern recognition method to the part unknown certain characteristic forecast function. The preliminary study r

20、esult indicated: This kind of embedded database's research technique has the application Proceedings of the 3rd WSEAS Int. Conf. on CIRCUITS, SYSTEMS, SIGNAL and TELECOMMUNICATIONS (CISST'09)ISSN: 1790-5117 120

21、ISBN: 978-960-474-42-0and humidity, for the crops to provide the best temperature and humidity of the environment. 3.1 The Systematic Hardware Makes Up According to the functional and technical indicators schematic d

22、iagram of system hardware design structure shown in Figure 2, as was the object of all motor control, Electromagnetic valve, Electromagnetic switches, etc.- electrical equipment, and the controller use of the envi

23、ronment and relatively poor, in order to improve the control system The reliability, output controller interface using solid state relays, solid state relays contain photoelectric isolation and SCR, it has good effect

24、s of segregation, the strong and weak, for electrical isolation, a further SCR Can reduce the power of the weak-interference, improve system reliability. 3.1.1 Input Module This module's major function is passe

25、s to the greenhouse in temperature and humidity data the computer. The traditional load module is by temperature, the humidity sensor, the special-purpose amplifier and ADC is composed. What because they process is

26、the simulated signal, is disturbed easily the influence which and floats warm, creates the precision and the reliability is not high. Adopt the advanced integrated transducer of digital temperature and humidity in th

27、e input subsystem of this system. Its most major characteristic is the direct output digit quantity, does not need the signal amplifying circuit and ADC. Moreover it uses “a main line” the system, may receive, the tr

28、ansmission data in a data line, and may hang meets many sensors, the microcontrollers distinguishes through the difference different sensor serial number measures the temperature and humidity spot one by one. 3.1.2

29、 Data Storage Module This module uses the microcontrollers internal FLASH memory, enables the controller both online to revise in 1 year the random number of days 1 hour temperature and humidity ideal setting value, a

30、nd can in the record greenhouse each hour average temperature and the average humidity value, moreover the request power failure data does not lose. The controller must record the data are many (in for 1 year, daily

31、 24 hours, each hour has a temperature and humidity setting value, but must record in 1 year each hour greenhouse temperature and humidity mean value). If uses each data 1 byte (i.e. 1B), altogether needs 3652422=350

32、40B. The data automatic input storage modules, completes the data test result saves according to the specific form in the corresponding storage space. 3.1.3 Control Output Module Controller control object more w

33、etting electromagnetic valve, electrical sunroof open, sunroof, organs, fan, heater, furnace blower and exhaust gas recirculation (EGR) heat exchange electromagnetic switch], for the eight output solid state relays

34、(A backup, in order to expand the new control object)， solid state relay by 5V. In order to improve the reliability of in control output modules include Electro-optical coupler, with the former level after level of c

35、ontact between no electricity. A transistor array drive relay, the circuit more tidy. 3.1.4 Reveal the Module Of the control system of LCD display module is mainly used to show the system to control and monitor the

36、 state. As the need to display Chinese characters and graphics, the system uses an LCM 240128 graphics LCD module. The liquid crystal display module is a cost-effective liquid crystal display module that can easily c

37、arry out a variety of characters and graphics display. The liquid crystal display module with the character generator inside, you can work in the way of graphics and text, this Diesel heater Humidification solenoid

38、 valve Fan Skylight on /off exhaust gas recirculation valve Centrifugal fan Temperature and humidity sensors Microcontrollers Fig.2, Schematic diagram of systematic hardware structure Proceedings of the 3rd WSEAS Int