可燃气体自动通断装置毕业的设计论文.doc

本 科 生 毕 业 设 计 (论 文) 题目:可燃气体自动通断装置 教学单位 ______电信学院_______ 姓 名 ________________ 学 号 _ ____ 年 级 ______________ 专 业 ______自动化________ 指导教师 ___ 职 称 ___ 年 月日 摘要 随着Abstract With the nations west-east gas transmission project implementation, and now more and morehomes and factories use natural gas as an energy source; including the taxi and bus of city using natural gas instead of gasoline to reduce operating costs. However,once the natural gas leak at a certain concentration, very likely to cause fire orexplosion. Threaten the personal safety of users, resulting in economic losses. From safety into consideration, design a low cost and reliable natural gas to be automatic hige alarm device is very necessary. This design is using single-chip microcomputer and sensor for the main part of a system, to natural gas (Silane kind of gas) testing, once produce gas concentration, alarm and real-time processing.. This design mainly USES the MQ2 flammable gas sensor for the field detection, will send a signal to sensors to collect MCU signal acquisition, processing, display and alarm, close the gas supply and exhaust valves, etc. The single-chip for STC89C52, reliability and performance to price ratio are very high, once the scene gas more than the threat valve design value, the system will according to set, automatic security processing, also can provide alert, for the user and operating personnel timely and effective treatment. The system has a real-time and accurate, and the characteristics of low cost, therefore it has a very broad prospect of application. Keywords: combustible gas；gas sensor；single chip microcomputer；divulging alarm 目录 ：绪论 1.1设计目的和来源..................................................................................................... 1.2设计计划..................................................................................................... 第二章 方案的选择和确定 2.1 涡轮流量传感器方案.................................................