毕业设计（论文）-一氧化碳报警器设计--软件设计.doc

东南大学成贤学院毕业设计报告（论文） 诚 信 承 诺 本人承诺所呈交的毕业设计报告（论文）及取得的成果是在导师指导下完成，引用他人成果的部分均已列出参考文献。如论文涉及任何知识产权纠纷，本人将承担一切责任。 学生签名： 日　　期： 摘 要 随着社会的进步和人们生活水平的提高，煤气或天然气已成为多数家庭的燃料，由于煤气泄露和使用天然气不当而引起的火灾给人们的生命财产安全带来了极大的隐患。防止煤气中毒与爆炸已成为人们的迫切需要，为此我们一氧化碳报警器。With the social progress and the improvement of peoples living standards, gas or natural gas has become the fuel of most families, the fire caused due to the gas leaking and the improper use of natural gas has brought great risks to peoples lives and property. To prevent gas poisoning and explosions have become the urgent needs of the people, for which we developed a carbon monoxide alarm. In view of the MCU AT89S52 has the advantages of high integration, we develop and design a carbon monoxide alarm based on it. The alarm does a real-time control on carbon monoxide (CO), and alarms when the carbon monoxide concentration exceeds the allowable value. In order to improve the sensitivity and accuracy of the system, the system uses a very stable sensor MQ-7. The sensor will convert the concentrations of the gas, which is in the test environment, to analog voltage. And afterwards the analog voltage will be converted to a digital signal through the Analog to Digital Converter ADC0809, and then processed in the microcontroller AT89S52. This design is just to achieve the organic combination of the ADC0809 and AT89S52 microcontroller. In addition, the design also combines the memory AT24C02, LCD monitor LCD1602 to respectively storage and display the detection data. Key words：Carbon monoxide; MCU; Alarm; Sensor; Analog to Digital Converter；Memory; LCD monitor 目录 摘要 I Abstract II 第一章 绪论 1 1.1 课题背景和意义 1 1.2 应用前景 1 1.3 一氧化碳报警器的概述 2 1.4 本次课题设计的目的 2 1.5 本次设计的主要任务 2 第二章 器件介绍 3 2.1 AT89S52单片机介绍 3 2.1.1 主要性能 3 2.1.2 与其它单片机相比的优缺点 4 2.1.3 端口功能 4 2.2 一氧化碳传感器介绍 5 2.2.1 传感器的定义和作用 5 2.2.2 传感器的分类 6 2.2.3 传感器的发展趋势 6 2.2.4 一氧化碳气体传感器MQ－7介绍 7 2.3 模数转换器ADC0809介绍 8 2.3.1 内部结构 8 2.3.2 引脚功能 9 2.3.3 工作过程 10 2.3.4 特