摘要:本设计课题所研究的无线多功能火灾报警器采用STC89C51为核心控制器，利用气体传感器MQ-2、ADC0809模数转换器等实现基本功能。首先，从硬件组成方面介绍单片机报警控制系统的设计，再对硬件原理图进行简单的描述。然后，做软件系统设计。从火灾报警器的基本构造、烟雾控制判断系统、硬件的选择和软件设计等方面进行较深入的分析。最终，仿真的效果与设计最终的要求基本一致，仿真结果正确。最后，在软硬件分别调试完成以后，将程序下载入单片机中，电路板接上电源，电源指示灯亮，按下开关按钮，数码管显示当前烟雾值，然后与设定值进行比较，可实现智能报警控制。56493

毕业论文关键词：单片机；气体传感器MQ-2；火灾报警；智能控制

Abstract: This design topic being studied wireless multifunction fire alarm system adopts STC89C51 as the core controller, using gas sensor MQ - 2, realize the basic functions such as ADC0809. First of all, the single-chip computer alarm control system is introduced in this paper in terms of hardware design, hardware schematic diagram to do a simple description. Then, the software part of the design. Judging from the basic construction of fire alarm system, smoke control system, hardware selection and software design of more in-depth analysis. In the end, the effect of the simulation and design of the final demand, the simulation result is correct. Finally, in after the completion of the hardware and software debugging respectively, download the program into the single chip microcomputer, circuit board connected to the power, the power indicator, press the switch button, digital tube display the current values of smoke, and then compared with the set value, it can realize intelligent alarm control.

Key words:STC89C51microcontroller ; MQ-2 gas sensor; fire alarm; intelligent control

 目录

1 绪论 4

1.1 课题的研究背景 4

1.2 课题的研究目的及意义 4

1.3 火灾报警器的发展及现状 5

1.4课题的研究内容 5

2 火灾报警器的总体方案设计 5

2.1系统的功能要求 5

2.2 系统的技术要求 6

2.3 系统的组成及方案设计 6

3 系统的硬件设计 7

3.1 单片机的介绍 7

3.2 烟雾探测电路的设计 11

3.3 液晶显示电路设计 13

3.4 声光报警提示电路 14

3.5 负载控制电路 16

3.6 按键电路 16

3.7 火灾报警器的原理图 17

4 系统的软件设计 20

4.1 软件介绍 20

4.2 系统程序流程图 21

4.3 proteus仿真图 22

5火灾报警器的调试结果 25

5.1调试结果 25

5.2实物图 25

结论 27

参考文献 28

致谢 29

附录 30