溫度監(jiān)控系統(tǒng)設(shè)計(jì)

電子機(jī)電論文編號(hào):JD899  附開題報(bào)告,任務(wù)書,文獻(xiàn)綜述,論文字?jǐn)?shù):11809,頁數(shù):44

目    錄
摘    要 I
Abstract II
引    言 1
1 方案比較與選擇 2
1.1 DS18B20方案 2
1.2 熱電偶方案 8
1.3 PN結(jié)方案 9
1.4 熱敏電阻方案 10
2 硬件設(shè)計(jì) 14
2.1 AT89S52 51系列單片機(jī)概述 14
2.2 單片機(jī)編譯環(huán)境 20
2.3 單片機(jī)最小系統(tǒng) 25
2.4 熱敏電阻原理圖 26
2.5 AD轉(zhuǎn)換原理圖 27
2.6 顯示原理圖 28
2.7 鍵盤原理圖 28
2.8 繼電器原理圖 29
2.9 狀態(tài)指示原理圖 30
3 軟件設(shè)計(jì) 30
3.1 整體流程圖 31
3.2 初始化程序 31
3.3 主程序 32
3.4 讀AD結(jié)果值 32
3.5 顯示 34
3.6 鍵盤 34
3.7 執(zhí)行 35
4電路設(shè)計(jì)軟件使用 35
4.1整體原理圖 36
4.2 PCB圖 37
結(jié)    論 38
參 考 文 獻(xiàn) 39
致    謝 40

摘    要
本設(shè)計(jì)目的為采用低價(jià)格的成本實(shí)現(xiàn)溫度的檢測(cè)和顯示，并對(duì)外界用電器進(jìn)行控制，使被控制對(duì)象溫度控制在設(shè)置的溫度范圍內(nèi)，本設(shè)計(jì)采用溫度傳感器為熱敏電阻，熱敏電阻的阻值會(huì)隨時(shí)溫度的變化，從而改變阻值，利用這一特性經(jīng)過AD轉(zhuǎn)換后給單片機(jī)處理，得到溫度值，并通過兩位數(shù)碼管顯示出來，溫度檢測(cè)范圍為1-99度，單片機(jī)采用51系列單片機(jī)，型號(hào)為AT89S52，數(shù)碼管采用共陽型數(shù)碼管，采用動(dòng)態(tài)掃描方式驅(qū)動(dòng)，并通過PNP三極管分時(shí)選通，通過三個(gè)LED顯示當(dāng)前溫度值與設(shè)置溫度值比較的結(jié)果，并通過NPN三極管控制繼電器的動(dòng)作與否。

關(guān)鍵詞：熱敏電阻；TLC549；AT89S51；單片機(jī)熱敏電阻檢測(cè)溫度

Abstract
The design aims to use low-cost price temperature detection and display, and the outside world is controlled by electrical appliances, so that the object was to control temperature control in the set temperature range, the design uses a temperature sensor for thermal resistance, thermal resistance the resistance will keep the temperature changes, thus changing the resistance, the use of this feature, after AD conversion to the single-chip processing, the temperature value, and through two digital tube display, temperature detection range of 1-99 degrees, 51 Series single-chip microcontroller, model AT89S52, digital tube using a total of Shenyang-based digital control, dynamic scan mode drivers, and through PNP transistor gating time, through three LED displays the current temperature and set temperature Comparing the results, and through NPN transistor to control the action or relays.

Key Words：Thermistor; TLC549; AT89S51; Singlechip thermistor temperature detection