多功能數(shù)字溫濕度計(jì)的設(shè)計(jì)

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摘要 溫度和濕度是在生產(chǎn)、生活、工程實(shí)驗(yàn)室中能夠產(chǎn)生很大影響的環(huán)境因素。溫度和濕度的測(cè)量在化工、農(nóng)業(yè)、軍事、醫(yī)療系統(tǒng)、環(huán)境等各個(gè)領(lǐng)域也被廣泛的應(yīng)用。尤其是在工程實(shí)驗(yàn)當(dāng)中，在提高測(cè)量精度、加速系統(tǒng)響應(yīng)時(shí)間等方面,對(duì)溫濕度測(cè)量也提出了更高、更新的要求，因此加劇了溫濕度計(jì)的多功能化的研究。
本文通過分析實(shí)驗(yàn)工作室溫濕度監(jiān)測(cè)技術(shù)的現(xiàn)狀及需求狀況和分析了該溫濕度監(jiān)測(cè)系統(tǒng)的功能基礎(chǔ)上,設(shè)計(jì)出更加完善的溫濕度計(jì)監(jiān)測(cè)系統(tǒng)。溫濕度計(jì)的傳統(tǒng)測(cè)量不僅費(fèi)時(shí)間，而且測(cè)量的精度不高；而數(shù)字溫度計(jì)與傳統(tǒng)的溫度計(jì)相比，具有讀數(shù)直觀，測(cè)量范圍廣和測(cè)量精度高的特點(diǎn)，再借助目前的單片機(jī)技術(shù)，使測(cè)量工具更小巧，輕便，多功能化。
本文利用所學(xué)習(xí)的高級(jí)程序語言及單片機(jī)的相關(guān)知識(shí)，設(shè)計(jì)一個(gè)能采集溫度濕度，顯示溫度濕度，語音報(bào)溫和預(yù)警安全的電路，并可以實(shí)現(xiàn)時(shí)間和鬧鐘功能的多功能化溫濕度計(jì)。本設(shè)計(jì)主要采用有單片機(jī)和溫度傳感器濕度傳感器及LED和語音芯片為主要器件的多功能化溫濕度。
關(guān)鍵詞: 溫濕度 單片機(jī) SHT11 LCD


The design of Multifunctional temperature hygrometer
Abstract Temperature and humidity are the environmental factors can have a big impact on production, life, works in the laboratory. Measurement of temperature and humidity have been widely used in the field of chemical industry, agriculture, military, medical system, environment etc.. Especially in the engineering experiment, in improving measurement accuracy, speed up the system response time, also put forward higher requirements, updating of the temperature and humidity measurement, thus accelerated the multiple functions of the temperature and humidity meter.
In this paper, the status and analysis of experimental workshop temperature and humidity monitoring technology and analysis of the function of the temperature and humidity monitoring system based on the design of monitoring system of temperature and humidity, more perfect. Temperature hygrometer traditional measurement not only takes time, and the accuracy is not high; and compared with the traditional thermometer digital thermometer, with intuitive readings, wide measurement range and high measurement precision characteristics, and then with the current chip technology, the measurement tool is more compact, portable, multifunction.
In this paper, with the knowledge of high-level programming language and MCU learning, can design a collection of temperature and humidity, temperature and humidity display, voice gentle warning safety circuit, multifunction and can realize the time and alarm function of temperature and humidity meter. This design mainly use the multifunctional SCM and temperature sensor and humidity sensor and LED and voice chip as the main device of temperature and humidity.
Key words: MCU SHT11 LCD temperature and humidity


目錄
第一章緒論 1
1.1 研究背景、內(nèi)容與意義 1
1.2多功能溫濕度計(jì)的發(fā)展趨勢(shì) 2
第二章 實(shí)驗(yàn)室環(huán)境測(cè)控的設(shè)計(jì)方案概述 4
2.1多功能溫濕度計(jì)關(guān)鍵技術(shù)研究 4
2.2實(shí)驗(yàn)室環(huán)境對(duì)實(shí)驗(yàn)的影響 5
2.2傳感器簡(jiǎn)介 5
2.2.1濕度傳感器 5
2.2.2溫度傳感器 6
2.3本章小結(jié) 7
第三章溫濕度計(jì)監(jiān)測(cè)系統(tǒng)模塊硬件設(shè)計(jì) 8
3.1單片機(jī)選型 8
3.2 LCD芯片選型 9
3.3時(shí)間實(shí)時(shí)顯示器選型 12
3.4數(shù)據(jù)采集模塊硬件電路 13
3.4.1 SHT11溫濕度計(jì)傳感器 13
3.4.2數(shù)據(jù)采集模塊硬件電路圖設(shè)計(jì) 14
3.5人機(jī)交互模塊硬件電路 15
3.5.1輸入模塊 15
3.5.2顯示模塊 16
3.6復(fù)位電路模塊和時(shí)鐘電路模塊硬件電路 17
3.6.1復(fù)位電路模塊 17
3.6.2時(shí)鐘電路模塊 18
3.7超限處理模塊硬件電路 18
3.8整體硬件模塊 19
3.9本章小結(jié) 19
第四章測(cè)控平臺(tái)溫濕度計(jì)軟件設(shè)計(jì) 20
4.1軟件運(yùn)行環(huán)境的選擇 20
4.2系統(tǒng)軟件機(jī)構(gòu)設(shè)計(jì) 20
4.2.1主函數(shù)結(jié)構(gòu) 20
4.2.2初始化軟件模塊 21
4.2.3按鍵輸入處理模塊 22
4.2.4溫濕度測(cè)量程序模塊 22
4.2.5數(shù)據(jù)處理模塊 24
4.2.6顯示、報(bào)警程序模塊 24
4.3數(shù)據(jù)轉(zhuǎn)換公式的概述 25
4.4本章小結(jié) 26
第五章多功能溫濕度計(jì)監(jiān)測(cè)系統(tǒng)仿真與功能測(cè)試 27
5.1溫濕度計(jì)監(jiān)測(cè)系統(tǒng)的軟硬件仿真 27
5.1.1仿真軟件介紹 27
5.1.2硬件電路仿真 27
5.1.3軟件仿真 27
5.2系統(tǒng)功能測(cè)試 28
5.3本章小結(jié) 28
結(jié)論 29
致謝 30
參考文獻(xiàn) 31
附錄：源程序 32