电力线载波系统

范文编号:JD775 范文字数:16592,页数:38

摘  要
    近年来随着电子技术的发展，特别是通信行业的发展，出现了各种各样的通信手段，有线通信、无线通信各自都呈现了多种不同的方式。这在我们的日常生活中到处可见。但是目前通信的基础设施设备昂贵对于一些专业的应用领域来说具有一定的限制。例如用在医院的病房呼叫系统、餐厅的智能点菜系统、厂房紧急呼叫系统等，这些设备的研发假如采用我们现阶段已有的媒介来进行传输，不但有利于节约成本而且开发起来也比较简单。
    目前针对这些需求，人们开始了电力线载波通信的研究。为了迎合市场需求和寻找更加合适的开发方案。在我们的此次系统设计中，我们提出了电力线数显病房呼叫系统的研制。该系统包括载波编码电路、载波发送电路、接收译码电路三部分构成。通过研制该系统设备，不但可以使我们对电力线载波通信有深刻的认识，而且在研发功能更加完善的电力线载波系统方面具有一定的引导作用。

关键词  电力线载波；病房呼叫；编码电路；接收译码电路

Abstract

    In recent years along with electronic technology's development, specially corresponded the profession development, presented various means of communication, the line-wire communication, wireless communication each one has presented many kinds of different ways. This in ours daily life everywhere obviously. But present correspondence's infrastructure equipment has certain limit expensively regarding some specialized application domain. For example uses in the hospital hospital ward ringing system, the dining room intelligence orders food the system, the workshop emergency call system and so on, if these equipment's research and development use our present stage existing medium to carry on the transmission, is not only      advantageous in saves the cost moreover to develop is also quite simple. present aims at these demands, the people started the power line carrier communication research. In order to cater to the market demand and seek for the more appropriate development program. In ours this subsystem design, we proposed the electric power line number obviously hospital ward ringing system's development. This system including carrier encode circuit, carrier transmission electric circuit, receive decoding circuit three parts of constitutions. Through develops this system equipment, not only may enable us to have the profound understanding to the power line carrier communication, and has certain guidance function in the research and development function more perfect power line carrier system aspect.
key word： power line carrier; Hospital ward call; Encode circuit; Receive decoding circuit

目录
摘  要 1
Abstract 2
第一章 绪论 3
1.1前沿 3
1.2课题的背景和意义 4
1.3国内外发展状况 5
1.4电力线载波通信的方式和特点 7
1.5电力线载波通信应用 8
第二章 方案的确立 11
2.1方案一：采用Zigbee组网方法 11
2.2方案二：利用单片机构成病房呼叫系统 12
2.3方案三：电力线数显病房呼叫系统 13
第三章 发送电路 14
3.1载波编码电路 14
3.2载波发射电路 19
3.3电源电路设计 20
第四章 接收电路 21
4.1 信号解调 22
4.1.1滤波电路 22
4.2 DTMF译码 23
4.2.1 译码芯片MC145436 23
4.3 地址显示部分 25
4.3.1 锁存器控制器 26
4.3.2 显示部分 27
4.4报警电路 29
4.5电源电路 31
第五章 系统调试 33
第六章 结论 34
致谢 35
参考文献： 36
附录一：发送原理图和PCB图 37
附录二：接收原理图和PCB图 38

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