多功能數字溫濕度計的設計

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摘要 溫度和濕度是在生產、生活、工程實驗室中能夠產生很大影響的環(huán)境因素。溫度和濕度的測量在化工、農業(yè)、軍事、醫(yī)療系統(tǒng)、環(huán)境等各個領域也被廣泛的應用。尤其是在工程實驗當中，在提高測量精度、加速系統(tǒng)響應時間等方面,對溫濕度測量也提出了更高、更新的要求，因此加劇了溫濕度計的多功能化的研究。
本文通過分析實驗工作室溫濕度監(jiān)測技術的現狀及需求狀況和分析了該溫濕度監(jiān)測系統(tǒng)的功能基礎上,設計出更加完善的溫濕度計監(jiān)測系統(tǒng)。溫濕度計的傳統(tǒng)測量不僅費時間，而且測量的精度不高；而數字溫度計與傳統(tǒng)的溫度計相比，具有讀數直觀，測量范圍廣和測量精度高的特點，再借助目前的單片機技術，使測量工具更小巧，輕便，多功能化。
本文利用所學習的高級程序語言及單片機的相關知識，設計一個能采集溫度濕度，顯示溫度濕度，語音報溫和預警安全的電路，并可以實現時間和鬧鐘功能的多功能化溫濕度計。本設計主要采用有單片機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。
關鍵詞: 溫濕度 單片機 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、內容與意義 1
1.2多功能溫濕度計的發(fā)展趨勢 2
第二章 實驗室環(huán)境測控的設計方案概述 4
2.1多功能溫濕度計關鍵技術研究 4
2.2實驗室環(huán)境對實驗的影響 5
2.2傳感器簡介 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 7
第三章溫濕度計監(jiān)測系統(tǒng)模塊硬件設計 8
3.1單片機選型 8
3.2 LCD芯片選型 9
3.3時間實時顯示器選型 12
3.4數據采集模塊硬件電路 13
3.4.1 SHT11溫濕度計傳感器 13
3.4.2數據采集模塊硬件電路圖設計 14
3.5人機交互模塊硬件電路 15
3.5.1輸入模塊 15
3.5.2顯示模塊 16
3.6復位電路模塊和時鐘電路模塊硬件電路 17
3.6.1復位電路模塊 17
3.6.2時鐘電路模塊 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 19
第四章測控平臺溫濕度計軟件設計 20
4.1軟件運行環(huán)境的選擇 20
4.2系統(tǒng)軟件機構設計 20
4.2.1主函數結構 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溫濕度測量程序模塊 22
4.2.5數據處理模塊 24
4.2.6顯示、報警程序模塊 24
4.3數據轉換公式的概述 25
4.4本章小結 26
第五章多功能溫濕度計監(jiān)測系統(tǒng)仿真與功能測試 27
5.1溫濕度計監(jiān)測系統(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)功能測試 28
5.3本章小結 28
結論 29
致謝 30
參考文獻 31
附錄：源程序 32