课程设计---可燃气体检测及报警系统设计报告

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1、 题目：可燃气体检测与报警系统设计题目：可燃气体检测与报警系统设计 摘摘 要要 摘摘 要：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。本系统由 ADC0809CCN 处理数据，MCU 采用 STC89C52 单片机，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

2、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。 关键词关键词： 传感器 ，ADCO8O9CCN ， 单片机 ， 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 c

3、onversion, voltage conversion concentration, concentration display, sound and light alarm warning devices posed. The system consists of ADC0809CCN processing data, MCU using STC89C52 SCM, the completion of the acquisition of gas concentration display signal transmission, display and other functions.

4、 The design of the combustible gas alarm consists of six components: 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 the composition 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 of