基于AVR单片机的可燃气体报警系统设计  

Design of Combustible Gas Alarm System Based on AVR MCU

作　　者：谭翠兰[1] 

机构地区：[1]江汉大学物理与信息工程学院,湖北武汉430056

出　　处：《江汉大学学报（自然科学版）》2016年第4期339-346,共8页Journal of Jianghan University：Natural Science Edition

摘　　要：利用Atmel公司的AVR单片机和日本Nemoto公司生产的催化燃烧式可燃气体传感器NAP-100AC设计了一套智能可燃气体报警系统,系统由可燃气体控制器和探测器组成,装于探测器上的传感器NAP-100AC用于检测可燃气体浓度,经过信号放大处理电路后由探测器进行AD采样,计算当前测试区域的气体浓度,控制器与探测器之间采用RS-485总线进行通讯。该系统能够在0%LEL^100%LEL范围内对甲烷浓度进行实时监测及动态显示,具有二级报警及历史数据查询等功能,可应用于城市可燃气体监测及工业可燃气泄漏检测。Intelligent combustible gas alarm system is designed based on AVR series microcontroller and catalytic type gas sensor of NAP-100AC. The system is composed of combustible gas controller and detector, NAP-100AC is employed to convert chemical signal into electric signal and this signal will be amplified by circuit, and the detector calculated out the gas concentration of current test area by sampling the output of amplified circuit. Controller communicated with detector by RS-485 bus. The calibration of the detector and the concentration calculation method are introduced in detail, and the reliability of the algorithm is testified by data. The system can monitor the combustible gas concentration within 0%LEL -100%LEL range, and it has the function of dynamic display, alarm and history data query. The system has broad application prospects in the field of urban combustible gas monitoring and industrial combustible gas leaking detection.

关 键 词：NAP-100AC 催化燃烧 爆炸下限 可燃气体 报警 

分 类 号：TH89[机械工程—仪器科学与技术]