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摘要:隨著計算機的發(fā)展，單片機在各種領(lǐng)域得到越來越廣泛的應(yīng)用。 單片機是一種集成電路芯片，是采用集成電路技術(shù)把中央處理器、隨機存儲器RAM和ROM、I/O口和中斷系統(tǒng)、定時器/計時器等功能集成到一塊硅片上形成的一個微型計算機系統(tǒng)。 電冰箱溫度控制系統(tǒng)是采用數(shù)字式溫度傳感器DS18B20完成對電冰箱冷藏（凍）室溫度數(shù)據(jù)采集，并將采集到的數(shù)據(jù)轉(zhuǎn)換為數(shù)字信號傳送到AT89S52分析處理，達到智能控制目的。本系統(tǒng)采用AT89S52單片機作為控制核心，通過單片機對SA8382專用芯片的控制產(chǎn)生PWM信號，用PWM信號去控制功率模塊組成逆變電路，輸出不同頻率的交流電，實現(xiàn)壓縮機的變頻控制，達到可變制冷的目的。 本文在第一章介紹電冰箱的系統(tǒng)組成、工作原理以及變頻冰箱的特點；第二章介紹了控制系統(tǒng)總體設(shè)計方案；第三、四章介紹了控制系統(tǒng)的硬件和軟件的設(shè)計。 關(guān)鍵詞 AT89C51單片機；DS18B20傳感器；LCD1602顯示器;溫度控制
Abstract:With the development of computer, computer is more and more widely used in various fields. SCM is a kind of integrated circuit chip, which is in the use of integrated circuit technology to CPU , RAM and ROM, I/O port and interrupt system, timer / timer functions ,which is integrated into a micro computer system to form a silicon chip. Refrigerator temperature control system is in the use of digital temperature sensor DS18B20 to complete the refrigerator refrigeration (frozen) room temperature data collection, and the collected data is converted to a digital signal is transmitted to the AT89S52 processing, which is to achieve intelligent control. This system uses AT89S52 as the control core, PWM signals generated by single chip on the SA8382 control chip, which is to control the power module inverter circuit for PWM signal, the output of different frequency alternating current, the compressor frequency control,which is to achieve the purpose of variable refrigeration. In this paper, the first chapter introduces composition work principle and variable frequency refrigerator refrigerator; the second chapter introduces the overall design scheme of the control system; the third, the four chapter introduces the design of hardware and software of control system. Keywords AT89C51 single-chip microcomputer DS18B20 sensors LCD1602 display The temperature control |
