大棚多點(diǎn)溫濕度檢測(cè)系統(tǒng)

論文編號(hào):ZD1204   論文字?jǐn)?shù):22097,頁(yè)數(shù):55  附原理圖 ，外文翻譯

摘  要

 人類(lèi)的生存和社會(huì)活動(dòng)都與溫度濕度息息相關(guān)。在人們的日常生產(chǎn)和生活中都離不開(kāi)溫度和濕度的測(cè)量。本文設(shè)計(jì)了一種簡(jiǎn)單適用的空氣溫度和濕度的檢測(cè)器，它能精確實(shí)時(shí)的測(cè)量出空氣的溫度和相對(duì)濕度。其濕度范圍1～100％RH，顯示精度為5%RH；度溫度范圍為－55℃～＋150℃，顯示精度為±0.5℃。
 整個(gè)系統(tǒng)選用AT89C51作為中央處理單元，并配以外圍的A/D轉(zhuǎn)換電路、鍵盤(pán)顯示電路和RS-232串口電路等基本電路構(gòu)成了檢測(cè)器的核心部件，并通過(guò)溫度傳感器DS1820和濕度傳感器HM1500來(lái)采集最多16點(diǎn)的溫濕度數(shù)據(jù)，來(lái)完成溫濕度檢測(cè)、實(shí)時(shí)顯示、數(shù)據(jù)傳輸?shù)裙δ堋?br />  本設(shè)計(jì)選用了嵌入式系統(tǒng)，結(jié)構(gòu)簡(jiǎn)單、體積小、實(shí)時(shí)性好，便于實(shí)時(shí)采集環(huán)境溫度和濕度。并設(shè)計(jì)了與上位機(jī)的通信接口，可接入上位機(jī)，來(lái)實(shí)現(xiàn)綜合管理、存儲(chǔ)數(shù)據(jù)、打印曲線(xiàn)及事后數(shù)據(jù)處理。經(jīng)過(guò)簡(jiǎn)單的改變，可接入控制電路，成為集溫濕度檢測(cè)、實(shí)時(shí)顯示、數(shù)據(jù)傳輸、溫濕度自動(dòng)控制為一體的溫室智能控制儀。
 本設(shè)計(jì)的產(chǎn)品不但適用于家庭，也適用于溫度范圍在－55℃～＋150℃內(nèi)的所有場(chǎng)所。如：蔬菜生產(chǎn)的溫室、工廠(chǎng)等。其具有結(jié)構(gòu)簡(jiǎn)單、制造成本低、適用范圍廣、便于攜帶等優(yōu)點(diǎn)。

關(guān)鍵字：溫度傳感器 濕度傳感器 模/數(shù)轉(zhuǎn)換器 單片機(jī) 串行通訊

 
Air temperature and moisture examination machine system probe unit

Abstract
Temperature and the moisture are indispensable to people’s existence and social activities. People cannot do without the measurement of temperature and humidity. In This article, THE author described the design of an air temperature and moisture sensor which is simple and readily available. It can be used to measure out the real time temperature and relative moisture of the air in an exact way.   the scope of the   of moisture ranges in 1 ~100% RH, and  the manifested accuracy degree is 5% RH; The temperature scope is  － 55 ℃～ +150 ℃ ,and the showed accuracy degree is the ± 0.5 ℃ .
 I use AT89C51 as Central Processing Element for the system, and constitute the core parts together with the basic electric circuits such as A/D converting, keyboard manifesting and RS-232 electric circuits around it. The system collects the data of temperature and humidity by the temperature sensor DS1820 and the humidity sensor HM1500 at the most the 16 places. Such functions help to complete the temperature and humidity measurement, manifestation at the real time and the date transmitting. 
 Embedded system is used in this design which is simple in construction, small in volume, inexpensive in cost and really handful. It is convenient for collecting data about temperature and humidity at the real time. Communications interface is also intercalate to get connected with the xxx for realizing integrated management, data recording, and the printing of curve and the data processing afterwards. After simple transformation, it can be connected into the control circuits and functions as a glasshouse intelligence director which can be used to measure temperature and humidity, manifest them at the real time, transmit data, and automatically control the temperature and humidity.
 This product is not only  applicable for family use, but also  for all places with  temperature ranging from  － 55 ℃ to +150 ,such as Greenhouses for planting vegetables, factories etc. It has the advantages as the simplicity of construction, lowness of cost, vast range of availability and convenience for taking.
 
Key word: temperature sensor, moisture sensor, analog-to-digital converter, Embedded Micro-Controller Unit, serially communication

目    錄

第一章 緒論·1
 1.1主要國(guó)家溫室類(lèi)型與生產(chǎn)方式·1
 1.2生產(chǎn)發(fā)展趨勢(shì)·1
 1.3國(guó)內(nèi)工廠(chǎng)化農(nóng)業(yè)的基本現(xiàn)狀·1
 1.4溫室環(huán)境要素·2
第二章 方案論證4
 2.1 不同方案的比較·4
 2.2 本設(shè)計(jì)中所采用的方案·5
 2.3溫度濕度傳感器的選擇·5
第三章 硬件系統(tǒng)設(shè)計(jì)7
 3.1原理結(jié)構(gòu)圖·7
 3.2單片機(jī)最小系統(tǒng)·7
 3.3溫度傳感器15
 3.4 濕度傳感器21
 3.5多路開(kāi)關(guān)·26
 3.6模擬/數(shù)字轉(zhuǎn)換·28
 3.7顯示、鍵盤(pán)電路31
 3.8 串行通訊接口電路38
第四章 軟件系統(tǒng)設(shè)計(jì)·40
 4.1主程序流程圖40
 4.2溫度轉(zhuǎn)換子程序流程圖41
 4.3濕度轉(zhuǎn)換子程序流程圖42
 4.4溫度傳感器DS1820初始化流程圖·43
 4.5 程序清單44
總結(jié)52
參考文獻(xiàn)53
附錄1 大棚多點(diǎn)溫濕度檢測(cè)系統(tǒng)硬件原理圖54
附錄2 大棚多點(diǎn)溫濕度檢測(cè)系統(tǒng)軟件流程圖55