摘 要:家用燃气安全报警系统通过气敏传感器能有效检测空气中的可燃性气体(如甲烷)的浓度,当浓度超过系统预设的安全阈值时,该系统就能发出声光报警信号,及时提醒人们采取安全措施。本设计所研究的家用燃气泄漏安全监测系统把气体传感器、放大电路、A/D转换器、单片机、声光报警电路合理地连接在一起。首先,利用气体传感器采集空气中可燃性气体浓度信号,通过放大电路对信号进行放大,经A/D转换把模拟量转换成数字量,将数字量送入单片机,单片机将接受到的数字量与安全阈值进行对比,若气体浓度超过安全阈值,则该系统会发生声光报警。40436 毕业论文关键词:气体传感器;声光报警器;单片机
The Design of The Household Gas safety Alarm System
Abstract: Household gas safety alarm system by gas sensor can effectively detect the concentration of combustible gases (such as methane) in the air, when the concentration exceeds the safety of the system default threshold, the system can send sound and light alarm signal, remind people to take safety measures in a timely manner.The design research of safety monitoring system of household gas leak gas sensor, amplifying circuit, A/D converter, single-chip microcomputer, sound and light alarm circuit properly together.First of all, the use of gas sensor to collect signals, combustible gas concentration in the air by amplifying circuit for signal amplification, the A/D conversion convert analog to digital, the digital quantity into MCU, MCU will accept the digital quantity compared with safety threshold, if the gas concentration exceeds safety threshold, the system will sound and light alarm.
Key words: Gas sensor; Audible and visual alarm; SCM
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