可燃性气体检测报警器设计.doc

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某某工程技术大学
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07-3班
姓 名 赵旭斌
学号 0707060327
指 导 教 师 卢万杰
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摘要
本设计主要设计可燃性气体监测报警仪，包括其工作原理与其软、硬件的设计。它由可燃性气体传感器、模/数转换、单片机、显示局部、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。显示局部采用74LS164芯片和LED数码管进展显示;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单片机进展控制，能根据天燃气气体检测浓度进展声光报警，并控制相应设备进展工作，实现安全保护。
关键词:传感器;气体检测;报警仪;STC89C52
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Abstract
This design mainly introduces the budstible gas monitoring alarming device, including its principle and hardware and software design. It consists of 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 microputer 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 microputer 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
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目录
前言……………………………………………………………………………………………1
1、总体设计方案……………………………………………………………………………2
………………………………………………………3
2、硬件局部…………………………………………………………………………………4
……………………………………………………4
………………………………………………………………4
、LED显示电路…………………………………………………………………7
、蜂鸣报警电路…………………………………………………………………9
、继电器电路………