【作者】 邹轶才；

【导师】 李志俊；

【作者基本信息】 武汉理工大学 ， 控制理论与控制工程， 2005， 硕士

【摘要】 随着人们生活水平的不断提高,家庭安全服务正在逐渐引起人们的重视。由于子女的上班,很多老人尤其是患病者不能得到很好的照顾,出现险情时不能得到及时处理,存在很大的安全隐患。因此,在住宅小区中设置联网紧急求助系统,使小区物业管理中心能对住户的险情进行及时处理,这正是人们所期盼的。随着电话设备的大规模普及,使得利用公共电话网络实现紧急求助变得简单易行。在此,本文将介绍一种基于公共电话网络的社区紧急求助系统,这对改善人居环境和实现楼宇自动化都将大有帮助。 根据用户需求和市场调查结果,我们确定该系统必须实现的主要功能为:当求助终端用户遇到紧急情况需要求助时,他可以通过求助终端上的紧急按键向求助中心拨打求助电话。电话接通后,求助双方可以实现免提通话。这样有利于求助中心了解求助现场情况,也方便求助用户了解求助是否成功。求助中心还建立了求助用户数据库,当有求助电话拨入时,我们将求助用户的电话号码解码后接入计算机,然后通过它对用户数据库进行查询,将查询结果(用户信息)显示在一块LED屏幕上。当求助中心的电话占线时,求助终端具有自动重拨功能,一直重拨到求助电话接通为止,这样就增加了求助的可靠性。 本论文共分六章。第一章简要介绍了社区求助系统的需求和发展概况,提出了系统的总体设计方案。第二章主要阐述了DTMF的拨号原理和求助终端的硬件设计。第三章介绍了求助终端的软件设计,包括程序设计思想、程序流程图、I~2C总线的基本原理以及模拟I~2C总线的通用软件包。第四章是信息显示系统的设计与实现,详细阐述了LED点阵显示器的工作原理、汉字的显示和汉字字模的快速提取、串行通信协议以及硬件电路的设计。第五章是求助中心的软件设计,包括软件的需求分析、客户数据库的建立、程序界面设计以及上位机和LED屏幕之间的通信程序。第六章作为一个总结,指出了论文所做的工作和存在的不足等。 本论文所研究的社区求助系统经过设计与调试已经形成产品,但是针对整个楼宇自动化领域,许多工作仍有待于进一步的研究。更多还原

【Abstract】 With the continuously raising of the living level of people, the safety service for family has being emphasized by the people. Because son and daughter has to go to work, a lot of old men (especially ill men) can’t get the good care, they can’t get rescue in time while appearing the emergency, this is a great safety loophole. Therefore, people expect management center can handle emergency in time through an emergency call system. With the telephone equipments popularized, it is very easy that the realization of emergency call by use of PSTN (Public Switch Telephone Network). Now, this paper will introduce a kind of emergency call system for community based on PSTN. This will bring great help for the improvement of living environment and the realization of building automation.According to the customer’ s need and the market research results, the main function that this system must carry out is: When the people meet the emergency to need to ask for help, he can make a help phone call to the help center through the urgent key on the help terminal. After telephone connected, the both parties can converse. This function make the help center know the spot circumstance, in addition, the help customer can also know asking for help whether succeed through conversation. The help center established a customer database, when a help phone is sent to the help center, we decode the customer’ s telephone number, then, the decoding result is input into computer, at last, search the customer database and show the search result (the customer information) on a piece of LED screen. When the help center’ s telephone is busy, the help terminal can dial again automatically until the telephone connected. The function can increase the system’s reliability.This paper is divided into six chapters. Chapter one introduces the need and development general situation of community help system, and givea total design project of this system. Chapter two mainly elaborate that the basic principle of DTMF (Dual Tone Multiple Frequency) and the hardware design of the help terminal. Chapter three introduces the software design of the help terminal, include the program design thought、 program flow chart、 the basic principle of I~2C bus and the general software package for imitation I~2C bus. Chapter four is the design and realization of the information show system, detailed elaborate that the principle of LED display、 the show and type matrix of Chinese character、 the protocol of serial communication and the design of the hardware electric circuit. Chapter five is a software design for help center, include the need analysis of software、 the establishment of customer’s database、 the design of program’s interface and the communication program between up computer and LED screen. Chapter six is a summary, pointing out the work this paper do and existent shortage.The emergency call system for community this paper researched has already become product through debugging and modification again and again. But for the whole building automation field, many works are treat in the further research.更多还原