【正文】 單元的選 擇與論證 單片機(jī)控制模塊的選擇論證 方案一：采用 XC9000系列的 FPGA。 4. 系統(tǒng)電路設(shè)計(jì) ........................................................................................................... 4 單片機(jī)主控電路設(shè)計(jì) ....................................................................................... 4 DS18B20 溫度檢測模塊和 HS1101 濕度檢測模塊電路設(shè)計(jì) ....................... 5 HS1101 濕度檢測傳感器工作原理 ....................................................... 7 DS18B20 溫度檢測傳感器工作原理 .................................................... 7 蜂鳴器電路原理 ..................................................................................... 8 1602 液晶顯示模塊電路設(shè)計(jì) .......................................................................... 8 5. 系統(tǒng)軟件設(shè)計(jì) ........................................................................................................... 9 軟件設(shè)計(jì)流程圖 .............................................................................................. 9 軟件設(shè)計(jì)分析 ................................................................................................ 10 6. 系統(tǒng)測試 ................................................................................................................. 10 主要指標(biāo)測試 ................................................................................................. 10 測試結(jié)果分析 ................................................................................................. 11 7. 結(jié)論 ......................................................................................................................... 11 參考文獻(xiàn) ...................................................................................................................... 11 附錄 .............................................................................................................................. 13 附錄一：系統(tǒng)的總原理圖 ................................................................................... 13 附錄二：系統(tǒng)的 PCB 元件分布圖 ..................................................................... 14 附錄三：程序清單 ............................................................................................... 17 附錄五：元器件清單 ........................................................................................... 28 1. 方案設(shè)計(jì)及論證 總體方案設(shè)計(jì) 經(jīng)分析，將系統(tǒng)分為兩個(gè) 部分，一個(gè)是由溫濕度傳感器 組成的檢測部分，另一個(gè)是由 單片機(jī)和 1602 液晶組成的主控 與顯示 部分。 關(guān)鍵詞： 溫濕度測量系統(tǒng) 精度高 速度快 體積小 Abstract: The temperature and humidity measurement system is based on singleline type temperature sensor DS18B20, capacitive moisture sensorSCM STC89C52 for temperature humidity measurement and respectively by LCD display. The line 1602 Temperature sensor DS18B20 is singleline type, volume supersmall, hardware KaiXiao ultralow, strong antijamming capability, high precision, additional features strong ideal singlechip microputer temperature sensor, realtime temperature data, depending on the directive given readable. HS1101 is capacitive sensor, air humidity in different humidity presents different capacitance, 0% ~ 100% RH humidity, within the scope of capacitance change to 200PF, from 162PF error for 2% RH error. e can see its precision is very high, in order to reflect the capacitance change, the system USES the 555 more harmonic concussion circuits produce different frequency, which is used to detect humidity. SCM acquisition to two sensor gives data processing and calculated, the current temperature and humidity and give the display on the LCD panel. This system has a readable, high stability, reaction speed, measured values exact characteristic. Keywords: temperature and humidity measurement system high precision speed small volume 目錄 1. 設(shè)計(jì)要求 ................................................................................. 錯(cuò)誤 !未定義書簽。單片機(jī)采集到兩個(gè)傳感器給出的數(shù)據(jù)進(jìn)行處理與計(jì)算，得出當(dāng)前的溫度與濕度并送給液晶屏顯示。 HS1101 是電容式空氣濕度傳感器，在不同的濕度環(huán)境下呈現(xiàn)出不同的電容值， 0%～ 100%RH 濕度范圍內(nèi)，電容從 162PF 變化到 200PF，誤差誤差為 2%RH。 摘要 此溫濕度測量系統(tǒng)是基于單線式溫度傳感器 DS18B電容式濕度傳感器 單片機(jī) STC89C52 對溫度濕度分別測量并通過液晶顯示屏 1602 經(jīng)行顯示。 溫度傳感器 DS18B20 是單線式，體積超小，硬件開消超低，抗干擾能力強(qiáng)，精度高，附加功能強(qiáng)的理想單片機(jī)溫度傳感器，可實(shí)時(shí)根據(jù)指令給出溫度數(shù)據(jù)，可讀性高?？梢娖渚确浅８撸瑸榱朔从吵銎潆娙莸淖兓?，本系 統(tǒng)采用 555 多諧震蕩電路產(chǎn)生不同的頻率，用于檢測濕度。本系統(tǒng)具有可讀性高，穩(wěn)定性高，反應(yīng)速度快，測量值準(zhǔn)確的特點(diǎn)。 2. 方案設(shè)計(jì)及論證 ..................................................................................................... 3 總體方案設(shè)計(jì) .................................................................................................. 3 系統(tǒng)主要單元的選擇與論證 ...................................................................... 3 單片機(jī)控制模塊的選擇論證 ................................................................. 3 溫度濕度檢測模塊的選擇與論證 ......................................................... 3 顯示模塊的選擇與論證 ......................................................................... 3 系統(tǒng)組成 ........................................................................................