可燃性气体检测报警器设计.doc

本科课程设计
题目可燃性气体检测报警器设计
院(系、部) 机械工程学院
班级机电
姓名
学号
指导教师
摘要
本设计主要设计可燃性气体监测报警仪,包括其工作原理及其软、硬件的设计。它由可燃性气体传感器、模/数转换、单片机、显示部分、报警输出、应用系统软件等组成。从传感器出来的微电流信号,经过模/数转换后送入单片机内,单片机控制显示相应浓度并在浓度过高时产生报警。显示部分采用74LS164芯片和LED数码管进行显示;报警输出采用固体继电器与蜂鸣器控制
报警;软件设计采用单片机C语言编程。该报警器以性能、参数稳定的气体传感器为探测器,采用STC89C52单片机进行控制,能根据天燃气气体检测浓度进行声光报警,并控制相应设备进行工作,实现安全保护。
关键词:传感器;气体检测;报警仪;STC89C52
Abstract
This design mainly introduces budstible gas monitoring alarming device, including its principle and hardware and software design. It consists bustible gas sensors, d/a transformation, SCM, display section, alarm output, application system software etc. From the sensor micro electric current signal, out by d/a transformation into SCM inside, after the single-chip puter control shows corresponding concentrations in excessive concentrations generated when the alarm. Show part adopts 74LS164 chips and LED digital display tube, Alarm output by using solid relay and buzzer control
Alarm, Software design USES the monolithic integrated circuit to the C programming language. This alarm with stable performance, the parameters of gas sensors as a detector, adopt STC89C52 single-chip puter control, can according to natural gas gas detection concentration acousto-optic alarm, and control the corresponding equipment work so as to realize safe protection
Keywords: sensor;gas detection;alarming device;STC89C52

目录
前言……………………………………………………………………………………………1
1、总体设计方案……………………………………………………………………………2
………………………………………………………3
2、硬件部分…………………………………………………………………………………4
……………………………………………………4
………………………………………………………………4
、LED显示电路…………………………………………………………………7
、蜂鸣报警电路…………………………………………………………………9
、继电器电路………………………………………………………………………9
、直流稳压电源电路…………………………………………………………10
、控制电路…………………………………………………………………………12
3、软件部分设计…………………………………………………………………………14
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4、总结与体会………………………………………………………………………………15
5、谢辞………………………………………………………………………………………16
参考文献……………………………………………………