智能微量灌溉系統設計(軟件部分設計)

電氣自動化論文編號:ZD795    論文字數:21407,頁數:48,附任務書，開題報告，文獻綜述

目錄
摘要 I
Abstract II
第1章 緒論 1
1.1 微灌概述 1
1.2 研究現狀 1
1.2.1 研究背景 1
1.2.2 國內外的發展情況 2
1.2.3 研究的意義和目的 3
1.3 課題指導思想 4
1.4 課題設計任務和要求 4
1.5 論文結構 4
第2章 微灌自動化技術 5
2.1 自動化灌溉概述 5
2.2 微灌自動化控制的發展現狀 5
2.3 微灌自動化控制的新技術 7
2.4 現代微灌自動化的發展方向 8
2.5 本章小節 8
第3章 系統設計思想及主要應用器件 9
3.1 系統設計的總體思想 9
3.2 系統硬件簡介 10
3.2.1 硬件設計思想 10
3.2.2 硬件構成 10
3.3 系統主要器件 11
3.3.1 核心控制器件AT89S51 11
3.3.2 S302H5V5濕度模塊 12
3.3.3 ADC0809 12
3.3.4 串行通信 13
3.3.5 E2PROM 16
3.3.6 LCD 17
3.4 本章小結 18
第4章 系統軟件設計 19
4.1 系統軟件設計要解決的問題 19
4.2 系統軟件模塊 20
4.2.1 A/D轉換模塊 21
4.2.2 LCD顯示 23
4.2.3 濕度算法 26
4.2.4 鍵盤掃描 29
4.2.5 E2PROM讀寫 32
4.2.6 串行通信 37
4.3 本章小節 39
結論 40
謝辭 42
參考文獻 43
附錄1  軟件程序 44

摘要
 本論文主要闡述了以單片機為處理器的智能微灌系統的硬件、軟件設計、系統編程等方面的問題。本微灌系統采用ATMEL公司的AT89S51單片機作為核心處理器控制整個系統的工作，系統由濕度傳感器，信號采集電路、鍵盤、顯示電路、輸出控制電路、串行通信電路、E2PROM讀寫電路、灌溉設備等構成。本系統可以實現自動檢測土壤周圍空氣濕度，自動控制微灌設備；同時，系統的參考濕度值可修改，并有斷電保存功能；采集到的濕度值和參考濕度值可以通過串行通信電路傳給上位機，上位機可以通過串行通信去修改微灌系統的參考濕度值，從而實現對整個系統的管理。
 硬件方面，土壤周圍濕度的測量采用先進的S302H5V5電容式濕度傳感器，信號采集的A/D轉換模塊采用了ADC0809芯片；鍵盤、顯示分別采用了點觸式按鍵和LCD顯示；輸出控制電路由三極管、或非門、繼電器、發光二極管等組成。軟件設計采取了流行的模塊化編程方法和模塊調試，軟件程序的開發全部采用了匯編語言。其主要包含的程序有：主程序、鍵盤掃描子程序、A/D采樣子程序、串行接收和發送子程序、LCD顯示子程序等。
 經過實驗室的連續調試證明：該控制器具有可靠性高、功能強、自動化控制、操作簡單等特點。另外，本文對整個智能微灌控制系統今后的進一步發展和完善提出了幾點建議。
關鍵詞：智能，微灌，單片機

Abstract
 The hardware layout and software development for single chip microprocessor intelligent micro-irrigation system and system programming are presented in detail in this paper. Based on the AT89S51 single chip microcomputer, the micro-irrigation system consists of humidity moisture sensors, signal gathering circuit, keyboard and monitor display circuit, out port control circuit, serial communication circuit,E2PROM reading-writing circuit and irrigating equipments and so on. The system is able to automatically detect the humidity of environment and control the irrigating equipment. Thus, the setting humidity can be modified. The humidity modified will be saved to prevent from that the data is lost when the power is cut off .Then, the gathering humidity of environment and setting humidity will be sent serially to the computer . On the other hand, the computer can modify the setting humidity of the micro-irrigation system by the serial communication. So we can use the computer to manage the micro-irrigation system.
 As far as the design of the hardware is concerned, here chose the S302H5V5 capacitive humidity sensor as the humidity sensor, ADC0809 as the A/D conversion, the touching style key as the keyboard, LCD as the monitor display. The out port circuit is consists of triode, NOR gate, relay, light-emitting diode and so on. The development of software adopts the popular modularized structure and the modularized debug facilities. The design of software adopts assembly language entirely. The primary program is composed of main program, keyboard scanning subroutine, A/D sampling subroutine, serial transmit and receive subroutine, displaying subroutine of LCD and so on.
 The successive debug experiments prove that the system is characterized by high reliability, capable control function, controlling by automation and simple operations. In addition, there are some suggestions about the further development and improvement of the micro-irrigation system in this paper.
Key words: intelligence, micro-irrigation, single chip microcomputer