摘 要

濕度檢測在工業(yè)、農(nóng)業(yè)、國防等行業(yè)有著廣泛的應(yīng)用。利用單片機(jī)技術(shù)的濕度檢測系統(tǒng)以其體積小，可靠性高而被廣泛采用。本文對濕度檢測系統(tǒng)進(jìn)行了分析設(shè)計(jì)。首先，對濕度檢測技術(shù)的應(yīng)用領(lǐng)域和發(fā)展?fàn)顩r做了簡單的介紹，同時(shí)，列舉了目前濕度檢測所常用方法以及各自所具有的特點(diǎn)。本文重點(diǎn)在于對該系統(tǒng)的硬件和軟件設(shè)計(jì)。在硬件設(shè)計(jì)過程中，詳細(xì)介紹了各部分電路的功能和特點(diǎn)。接下來，對系統(tǒng)中所用的濕度傳感器HM1500和A/D轉(zhuǎn)換芯片TLC1549作了簡單的介紹。在軟件設(shè)計(jì)過程中，繪制了各個(gè)程序模塊的流程圖，詳細(xì)介紹了各個(gè)模塊的作用。經(jīng)過對程序反復(fù)的修改，完善了軟件系統(tǒng)。最后，完成了對整個(gè)系統(tǒng)的設(shè)計(jì)。本系統(tǒng)具有靈敏度高、反映時(shí)間短等特點(diǎn)，并且具有智能化、可編程、小型便攜等優(yōu)點(diǎn)，相信本系統(tǒng)具有廣泛的應(yīng)用領(lǐng)域。
關(guān)鍵詞：單片機(jī)，濕度檢測，硬件系統(tǒng)，軟件系統(tǒng)



Single Chip Microcomputer Based on Humidity Detecting System

ABSTRACT

The humidity examination which is widely used in industry, agriculture, national defense and so on .the humidity examination which is widely used because that the system which uses microcontroller technology is volume small and reliability. This article has carried on the analysis design to the humidity examination system. First, the application and development condition of the humidity examination technology is made a simple introduction. And then, the humidity examination of commonly used method which has enumerated the characteristic as well as each one .The point of the article is the design of the hardware and software. In the process of hardware designing, the function and the characteristic of each part of electric circuits which has made a simple introduction in detail. Meanwhile, the humidity sensor HM1500 and the chip of the A/D transformation to the system in TLC1549 have been made the simple introduction. In the process of software designing, I have drawn up each program module flow chart, and introduced each module function in detail. Then to the procedure repeatedly revision, it has been consummated the software system. Finally, I has completed the over all system designing. This system have the characteristic of sensitivity high and the reflection time is short, and so on .It has the intellectualization, and programmable and small, then takes along short, and so on. It believed that this system has the widespread application .

KEY WORDS: MCU, Humidity Sxamination，Software System, Hardware System




目錄

前言 1
第1章 緒論 3
1.1濕度的基本概念 3
1.2濕度檢測的應(yīng)用領(lǐng)域 3
1.3 常見的濕度檢測方法及特點(diǎn) 4
1.4 濕度測量技術(shù)的發(fā)展趨勢 5
1.4.1 廣泛采用新技術(shù)、新工藝 5
1.4.2 提高測量精度和分辨力 5
1.4.3 增加測試功能 6
1.5 本課題研究的主要內(nèi)容和目標(biāo) 6
第2章 濕度檢測系統(tǒng)的功能與硬件設(shè)計(jì) 7
2.1濕度檢測方案的選擇 7
2.2設(shè)計(jì)方案的確定 8
2.1.1處理器 8
2.2.2顯示電路 8
2.2.3 鍵盤電路 8
2.3 濕度檢測儀的主電路設(shè)計(jì) 9
2.3.1 系統(tǒng)時(shí)鐘電路設(shè)計(jì) 9
2.3.2 系統(tǒng)復(fù)位電路的設(shè)計(jì) 10
2.3.3 按鍵與按鈕電路的設(shè)計(jì) 11
2.3.4 系統(tǒng)的顯示電路設(shè)計(jì) 11
2.3.5 電源設(shè)計(jì) 13
2.3.6 濕度檢測傳輸及A/D轉(zhuǎn)換電路 14
2.3.7 硬件電路原理圖 15
2.4 器件的選擇及說明 15
2.4.1 AT89C51單片機(jī)簡介 15
2.4.2 濕度傳感器HM1500 17
2.4.3 A/D轉(zhuǎn)換芯片TLC1549 18
第3章 軟件系統(tǒng)設(shè)計(jì) 21
3.1 主程序 21
3.2系統(tǒng)各程序模塊 21
3.2.1 濕度測量采集子程序流程圖 22
3.2.2 鍵盤處理子程序流程圖 23
3.2.3 超濕報(bào)警子程序流程圖 24
3.3系統(tǒng)抗干擾技術(shù) 25
3.3.1軟件陷阱 25
3.3.2看門狗技術(shù) 27
結(jié)論 28
謝 辭 29
參考文獻(xiàn) 30
附錄 31
外文資料翻譯 39