【正文】 1 摘要 本文通過采用單片機 AT89C51 作為敏感元件的溫度報警器的設計與制作，闡明了該裝置進行設計與制作的具體過程及方法。這種溫度報警器結(jié)構(gòu)簡單，由溫度控制開關(guān)和報警器兩部分組成，可操作性強，應用廣泛。工作時，溫度測量范圍為 0～ 100186。Ｃ。當溫度達到預定值時，利用單片機 AT89C51 的特性，采集電壓信號，驅(qū)動報警裝置，立刻發(fā)出報警信號，從而防止因溫度升高而帶來的不必要的損失。 關(guān)鍵詞 :單片機 AT89C51 溫度 報警器 Abstract This thesis introduces the design and the manufacture of the heat alarm by using the AT89C51 as the sensitive unit, has expounded the concrete process and the method which this equipment carries on the design and the manufacture. This kind of heat alarm the structure is simple,which is posed by two parts, the temperature control switch and the alarm apparatus, it is feasibility and the application is widespread. When it works, the survey scope of the temperature is 0 ~ 100 186。C. When the temperature achieves the predetermined value, using the AT89C51 characteristic to gather the voltage signal, actuates alarm device and sends out the alarm immediately, thus prevents the nonessential loss which brings by temperature increment . Keywords： AT89C51 Temperature Alarm 2 摘要 ......................................................................................................................... 1 Abstract ................................................................................................................ 1 緒論 ......................................................................................................................... 4 設計背景 ......................................................................................................... 4 設計目的及設計要求 ..................................................................................... 4 設計目的 ..................................................................................................... 4 設計要求 ..................................................................................................... 4 2 設計方案及方框圖 ............................................................................................ 5 設計思路及電路組成 ..................................................................................... 5 設計方案及工作原理 .................................................................................... 6 溫度報警器電路設計方案 ......................................................................... 6 工作原理 ..................................................................................................... 6 3 AT89C51 單片機 ............................................................................................... 7 AT89C51 簡介 ................................................................................................. 7 管腳說明 ...................................................................................... 8 AT89C51 主要特性 ...................................................................................... 10 4 傳感器的原理及控制 ...................................................................................... 10 溫度傳感器的介紹 ........................................................................................ 10 ........................................................................ 10 溫度傳感器的發(fā)展 ....................................................................................... 11 傳統(tǒng)的分立式溫度傳感器 —— 熱電偶傳感器 ....................................... 11 模擬集成溫度傳感器 ................................................................................. 11 智能溫度傳感器 ......................................................................................... 11 選用的溫度傳感器 ........................................................................................ 12 AD590 溫度傳感器的內(nèi)部結(jié)構(gòu) ： ............................................................... 12 5模數(shù)轉(zhuǎn)換器 AD0809 介紹 ................................................................................. 13 主要特性 ...................................