文档介绍：河北建材职业技术学院
毕业设计论文
题目:燃器报警器设计
系别信息机电系
专业应用电子技术
班级 09电子
姓名
学号 0406090102
指导教师
2012年4月20日
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、易爆炸,隐患事故多,如气体泄漏时不能及时发现和处理,会给家庭及邻居带来灾难性危害。本次设计内容包括可燃气体报警电路的结构及其工作原理。此报警电路以气敏传感器为主要组成部分,气敏半导体传感器检测到可燃气体时通过电导率的改变来控制多谐振荡器及正反馈振荡器间歇工作,通过报警电路从而达到报警的目的。
随着石油化工行业的发展,易燃、易爆气体的种类和使用范围都随之增加。这些气体在使用过程中一旦发生泄漏,与空气混合后将会引发火灾。由于气体本身存在的扩散性,发生泄漏之后,在外部风力作用下,可燃气体会沿地表面迅速扩散,扩大危害区域。一旦发生可燃气体泄漏事故,及时可靠地探测空气中可燃气体的含量,及时采取有效措施进行补救,采取正确的处置方法,减少泄漏引发的事故,是避免造成重大财产和人员伤亡的必要条件。
本次设计的题目是家用可燃气体报警器,主要应用于家庭中。本设计应用的主要器件是气敏半导体传感器,该传感器的灵敏度高,因此可以检测可燃气体的微量泄漏。
关键词:燃器;报警器;设计
ABSTRACT
Court to use liquefied petroleum gas, gas and bustible gas as a fuel, more and more, but these gases are harmful, explosive, hidden accidents, such as gas leaks, not timely detection and handling, will give families and neighbors to bring catastrophic harm. The design includes the structure and working principle of bustible gas alarm alarm circuit as the ponent of gas sensors, gas semiconductor sensor detection bustible gases is controlled by changes in electrical conductivity and the positive feedback oscillator intermittent alarm through the alarm circuit so as to achieve the purpose.
With the development of the petrochemical industry, flammable, the type and scope of use of the explosive gases have increased. These gases in the course of the event of leakage, mixed with air will result in a fire .Due to the diffusion of the gas itself, after the leak in the external wind effect gas experience rapid spread along the ground surface, expanding the hazard area. Once bustible gas leakage accident occurs, timely and reliable detection bustible gases in air content, and take timely and effective measures to remedy, correct disposal methods to reduce the leak caused the accident, is a necessary condition to avoid causing major property and casualty.
The subject of this design is the bustible gas alarm, mainly used in the home. The ponents of the design application i