苏州经贸职业技术学院毕业论文课题名称可燃气体超标报警器设计届别2010届系别机电系专业微电子班级微电0731学生姓名于少游学号0701093134指导教师吴振磊2010-01目录摘要：............................................................................................................................1前言................................................................................................................................2第一章protell99se以及可燃气体报警器的介绍....................................................31.1protell99SE介绍..............................................................................................31．2可燃气体报警器的介绍................................................................................31．2．1可燃气体报警器的分类...................................................................31．2．2可燃气体报警器的现状和发展.......................................................41.2．3可燃气体报警器的校准和注意事项..................................................4第二章可燃气体超标报警器的方案设计..................................................................52.1设计思路...........................................................................................................52.2单元电路的功能...............................................................................................62．3原理框图........................................................................................................6第三章设计步骤........................................................................................................73.1降压整流及稳压电路.......................................................................................73.1.1整流电路.................................................................................................73.2气敏传感器及比较电路...................................................................................93.2.1QM-N5型气敏元件..............................................................................93.2.2比较器LM393.................................................................................103.3振荡音响电路.................................................................................................123.4电路仿真.........................................................................................................143.5印制电路板设计.............................................................................................15第四章总结可燃气体超标报警器的组成及工作原理............................................164.1电路组成........................................................................................................164.2工作原理.......................................................................................................164.3可燃气体超标报警器总图............................................................................17总结..............................................................................................................................17谢辞..............................................................................................................................18参考文献......................................................................................................................18摘要：家庭使用液化气、燃气等可燃气体作燃料的越来越多，但是这些气体有害、易...
