糧倉溫濕度檢測系統(tǒng)

論文編號:ZD1269  論文字數(shù):21582,頁數(shù):55  附原理圖

 摘     要
 
 在糧食的存運和采購中，其水分含量及保存溫度是兩個很重要的參數(shù)。為了把含水量控制在最佳的收購和儲藏范圍內(nèi)，避免造成糧食霉爛等不必要的經(jīng)濟損失，滿足糧食儲藏部門及專業(yè)戶的要求，迫切的需要一種測量可靠、操作方便的谷物水分及溫度測定裝置。以往采用的谷物水分測量儀，測定的規(guī)則復(fù)雜、時間長且造價高，很難滿足要求，因此我們需要一種造價低廉、使用方便且測量準確的溫度測量儀。
    本系統(tǒng)由AD590及RHU-223進行信號采集，經(jīng)過AD574對采集到的模擬信號進行數(shù)模變換，在單片機AT89C51內(nèi)部進行數(shù)據(jù)處理，然后進行顯示，附加的有軟件設(shè)計等。
 通過計算機控制可以實現(xiàn)人機分離，節(jié)省人力物力，且本設(shè)計造價低，可控
性強，比較理想的溫度檢測系統(tǒng)。

關(guān)鍵詞： 單片機    傳感器     A/D轉(zhuǎn)換     顯示
 
  
 Monitor of Temperature and Humidity In Granary
     
Abstract
 In food save carried with purchase, it is humidity contains the deal and keeps the temperature is two very important parameters. For controlling to shout the amount of water within the scope of procure best with store, avoid resulting in the otiose economy in spoiled by mildew etc. in food lose, satisfying the food the hoard the request between section and profession door, crying need a kind of diagraph is dependable and operate the convenient corn humidity and temperature measurements device. Former adoptive of corn humidity measure ,the rule of the measurement complicacy, time long and build the price high, very difficult satisfy the request, therefore we need a kind of building the price cheap, usage convenience and measure accurate  degree of humidity measure  .           
 According to single a machine logarithms word signal of high sensitive with can control the sex, the degree of humidity of  spreads to feel the machine can produce the emulation signal, with A| D emulation arithmetic figure conversion  an a set of examinations for of function, I designing with AT89c51 for core system, among them include the power supply the system, A/ D conversion, single a machine, reply an electric circuit, temperature examination and control, keyboard and manifestation and reports to the police the electric circuit, system software etc. part of designs.
 Passing the calculator control can realize person's machine separates, save the manpower material resources, and this design builds the price low, can control
 The sex is strong, ideal temperature degree of humidity examination system.

Keywords：Microchip    Sensor    A/D Converter  

目錄

第一章  總  述 4
引言： 4
1.1檢測系統(tǒng)的技術(shù)指標及功能 4
1.2測試檢測控制系統(tǒng)的技術(shù)要求。 6
1.3應(yīng)用現(xiàn)場環(huán)境分析 6
1.4本設(shè)計的指導思想 7
第二章  方案設(shè)定及論證 8
2.1傳感器的原理及主要技術(shù)參數(shù) 8
2.2 溫度傳感器的選用 10
2.3單片機選擇 11
2.4信號采集部分 12
第三章  系統(tǒng)整體設(shè)計 14
3.1系統(tǒng)程序框圖： 14
3.2信號采集 14
3.2.1 溫度傳感器 14
3.2.2 多路開關(guān) 16
3.3硬件系統(tǒng)分析 16
3.3.1 A/D轉(zhuǎn)換 16
3.3.2單片機AT89C51 20
3.4.1顯示部分 27
3.4.2報警系統(tǒng) 32
3.4.3復(fù)位電路 32
3.4.5通訊 37
3.4.6蟲害檢測報警系統(tǒng) 38
第四章 軟件設(shè)計 39
主程序 46
參考文獻 56
結(jié)束語 57