可燃气体检测及报警系统设计报告.doc

题目:可燃气体检测与报警系统设计
摘要
摘要:本设计主要是由一个MQ-5传感器采集气体浓度信号,系统建立浓度与电压关系,进行浓度电压转换,电压浓度转换,浓度显示,声光报警构成的报警装置。处理数据,MCU采用STC89C52PLC,完成气体浓度信号的采集显示内容的传输、显示等功能。本设计的可燃气体警报器由六个部分组成:传感器、LED显示器、声光报警器、控制电路、A/D转换和电源模块。对采集的数字信号进行处理和判断,运用一定的算法计算出待检测气体成分及浓度并送到LED显示器显示出来。当检测气体浓度低于设定报警阀值的时候,LED显示器仅仅显示测得的可燃气体浓度;当检测气体浓度超出设定报警阀值时给出声光报警。
关键词: 传感器, , PLC , LED显示器, 声光报警
Abstract: This design is mainly a MQ-5 from the gas concentration sensor signal acquisition system to establish the concentration and voltage relationship for the concentration of voltage conversion, voltage conversion concentration, concentration display, sound and light alarm warning devices posed. The system consists of processing data, MCU using STC89C52 SCM, pletion of the acquisition of gas concentration display signal transmission, display and other functions. The design of bustible gas alarm consists of ponents: sensor, LED display, sound and light alarm, control circuit, A / D conversion and power module. On the acquisition of digital signal processing and judgments, the use of certain algorithms to calculate position and concentration of gas to be detected and sent to the LED display is displayed. When the test gas concentration less than the threshold set alarm time, LED display shows only the measured concentration bustible gas; When gas concentrations exceed the detection threshold when the alarm set to sound and light alarm.
Keywords: Sensor,, Single puter, LEDdisplay, Sound and light alarm
目录
1 前言 3
2 方案论证与比较 4
方案一 4
方案二 4
方案三 4
方案论证与比较 4
3 单元模块设计 5
5
6
LED显示及驱动 7
A/D采集与PLC最小系统 8
9
4 软件设计 10
10
11
A/D、PLC数据传输设计 11
5系统调试 12
12
12
12
传感器工作测试 12
A/D采集与PLC最小系统电路的调试 12
6 系统功能、指标参数 13
概述 13
参数指标 13
13
13
ADC0809工作原理 14
PLC部分 15
气体结果测量计算 15
7 结论 16
8 总结与体会 17
9 参考文献 18
附录一:相关设计图 19
附录二:相关设计程序 23
1前言
鉴于家用煤气中毒和矿井中***爆炸时常发生,造成