电气工程论文编号:DQ139   论文字数:12112,页数:28

目 录
摘要……………………………………………………………………………..……………...I
Abstract……………………………………………………………………………..………...Ⅱ
1  绪论………………………………………………………………………………………..1
   1.1  前言……………………………………………………………………………..…..1
 1.2  干手器的分类。…………………………………………………………………....1
 1.3  设计的整体框架…………………………………………………………………....2
 1.4  设计要求………………………………………………………………………..…..2
2  电源电路设计……………………………………………………………………..…….3
2.1  电源电路设计框图……………………………………………………………….... 2
2.2  电源电路的组成部分及功能…………………………………………..…………...3
 2.2.1  电源变压…………………………………………………………………......3
 2.2.2  整流电路…………………………………………………………………......3
 2.2.3  滤波电路……………………………………………………………………..4
 2.2.4  稳压电路…………………………………………………..………..……......5
3  555定时电路在设计中的应用………………….…….....…………………………..6
 3.1　555定时器的工作原理…………………………………………………………….6
 3.2  555定时器的典型应用……………………………………………………………..7
 3.2.1  单稳态触发器……………………………………………………………......8
 3.2.2  多谐振荡器………………………………………………………………......9
 3.2.3  占空比可调多谐振荡器……………………………………………………..10
 3.2.4  施密特触发器……………………………………………………………......10
 3.3  干手器定时开关电路设计………………………………………………………….11
4  红外线自动控制电路设计……………………………………………………………13
 4.1  红外线简介………………………………………………………………………….13
 4.1.1  红外辐射及近红外光波谱………………………………………………......13
 4.1.2  近红外光作为红外探测、遥控的光源的理由……………………………..13
 4.2  红外线自动控制的方式…………………………………………………………….15
  4.2.1  自动控制定义……………………………………………………………......15
  4.2.2  红外线光电开关……………………………………………………………..15
 4.3  红外线自动控制的应用…………………………………………………………….16
 4.4  红外线自动控制电路的设计……………………………………………………….17
 4.4.1红外线发射电路设计………………………………………………………….17
 4.4.2红外线接受及信号处理电路设计…………………………………………….19
5  自动干手器电子线路设计………………………………………………….…………20
 5.1  热风电路的设计…………………………………………………………………….20
 5.2  自动干手器电子线路图设计……………………………………………………….21
6  总结………………………………………………………………………………………...22
致谢…………………………………………………………………………………………......23
参考文献……………………………………………………………………………………….24

摘  要

 在当今社会，随着电子技术的发展和时代的进步，人们越来越注重生活上的卫生状况。节能环保型的自动干手器是一种高档卫生洁具。广泛应用于宾馆酒店、公厕等等公共场所的洗手间。
 干手器的工作原理是采用一种红外线感应的电路开关，当有人手伸过来时，红外线开关将电热吹风机自动打开，人离开时又自动将吹风机关闭。干手器自动感应基本电路是由电源电路、555定时开关电路、红外发射和接收电路、信号处理电路及风机电路等组成。
 在设计的过程中我对555定时电路的应用有了详细的了解，学到了课堂上无法学到的东西。通过实践我还对自己所学的各个方面的知识进行了总结，提高了自我学习能力和获取新知识的能力。通过对线路的设计节使我提高了发现问题、解决问题的能力，并且对问题的观察比以前更加敏锐了，考虑问题也更加全面了。
关键词：干手器；555定时开关；红外线

Abstract
    In modern society, along with electronic technology's development and the time progress, now society's people more and more pay great attention in the life the hygiene condition. The energy conservation environmental protection automatic hand-dryer are one kind of upscale hygienic sanitary equipment, widely applies in the guesthouse hotel, the public toilet and so on public place washroom.
 Operation principle of hand-dryer is using an induction infrared circuit switch. When the hand is offered, infrared switch will open the electric dryer automatically. When people leave, the dryer will close automatically. The basic circuit of hand dryer’s auto-induction make up of power supply circuit, 555 timer switch circuit, infrared transmitting and receiving circuit, signal processing circuits and fan circuit.
 In the process of designing 555 timer circuit I have a detailed understanding of the classroom can not be learned learned. Through practice I also learned of their knowledge of all aspects of a summary, improved self-learning ability and the ability to obtain new knowledge. Through the
design, I found to improve the problem, problem-solving skills, and observation of the problem more acute than before, and to consider the issue more comprehensive.
Keywords：hand-dryer; 555 time cut-outs; infrared