论文ATC在小区防盗报警系统中的应用

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4、 学 号： 0705110602 专 业： 电子信息工程 所在学院： 信息技术学院 指导教师： 徐志国 职 称： 讲师/工程师 2010年12月25日application of burglar alarm system in uptown based on at89c2051abstract : at89c2051 is powerful programmed microship,the hardware principle and software realization of gyard against theft and alarm system based on at89c2051

5、are introduce.key words : microchip guard against theft and alarm syetem at89c2051iprefacemany person have a habit that when going to study, working for a long time they will be home anti-theft lock insurance, prevent thieves entanglements room,but even the ordinary anti-theft entanglements will be

6、sure for skiing, the theft have rich experience of habitual is also very easy to come in, they take a little time to burst in. so somebody puts forward on the door with a concealed lock control switch,it can work after the owner leave out . if the master will closed concealed system in three minutes

7、, then system should stop work. but when there are thieves breaking to steal, and couldn't find this secluded alarm system to close it,the system will automatically alarm in three minutes.iithe way to realizated system2.1 design priniplessuch as figure 1 showes, using a microcontroller at89c2051

8、 as a cpu, it will realize intelligent alarm.the system is established by an defend switch k1, the door switch k2(often shut), microcontroller at89c2051, an 5 v super-mini relays (ssr), 7805 voltage regulations, an alarm.in addition can report to alarm, it will enter semaphore to keep long range to

9、link, and carry out long range supervision.2.2guard against theft the hardware of systemthe at89c2051 is a programmable eprom microchip of high performance by 53 bytes knot, compatible with industry standards mcs51 instruction group and pins, the atmel company produces of the at89c2051 is a kind of

10、microcontroller with strong function, it provided a vivid altitude useful solution to a lot of embedded control applications.it has the following racteristics:the 2 k bytes eprom, 128 bytes knot ram and 15 i/0 wire, two 16-bit timing/counters, five interruption structure with second class vector and

11、 a whole pair to of string line orifice, an accurate emulation compare machine, piece inside oscillator and clock circuit.at89c2051 designses include confidential bits and confidential bits 1 drives after weaving a distance, program memory can not be programming againunless do once erased, after con

12、fidential bits 5 being programmed, program cannot be read. this is an important guarantee for the safety of program and carried out procedure encryption.7805 integrated manostat provide a stable 5 v working voltage, and have a small volume,the higher accuracy , use convenience, multi-function protec

13、tion, output current extensible and other characteristics.there are overcurrent, overheating and regulator tube safety in the inside work zone protection, in order to prevent overburden but damage.solid - state relay, it uses solid-state device assembly and become a novel non-contact switch device,

14、have reliable work, fast switching speed, high working frequency, life long, low noise and other characteristics.the alarm adopted a language chip sr8803a the highest voltage of 5v, so making voltage appropriately reduced to string into d1, d2.the k2 directly connects in the door, door is open state

15、, so k2 is open position. otherwiseis it is the opposite. in addition added an indicator as a reminder, if the door is closed, as the k2 connects, then lamp anti bright, otherwise the lamp indication becomes bright.the meaning the door still has not closed completely.2.3guard against theft the softw

16、are of systemthe system adopts keiuversion 2 programming language.the keilc51 scompiler provides c language environment for the software development of 8051 microcontrollers, at the same time reserved to assembly code efficiency,fast and others characteristics.the c51 is completely hasing already be

17、en integrated into uvision2 integration development environments, this integrated development environment contains compiler, s the assembler, real-time operating system, the project manager, debugger.and also is an application development the software under windows, the interface amity, it is suitab

18、le to the developers use. the color syntax imaging and documents achiered function are optimized c source code . it can be editor in debugging, and can provide a kind of natural environment of adjusting to try and make you work more quickly and modify procedure.any control i/0 is the all the most ba

19、sic, and most of applied procedures also need i/0, the 89c2051 only have two i/0 port ,are respective is p1 port and p3 port, they all can use as single input or output port, when it used as the output ,so everyone pin external circuit can drive by high level 1 or low level 2 . indicator shows is us

20、ed when the 2051's i/0 ports as output , when the pins connecting led is the low level 0 , led conducting and lighting . due to 2051 has the situation that its output current is greater than the input current ,so let current flow into the chip. when programming by c language , it should set the

21、i/0 first .such as,in the system switches has just two states , open and closed . in a circuit set, when press the ortification switch , system is in working condition . the 2051's 19th pin is 0 level , otherwise it is the opposite . and when the door is to keep close state , the 2051's 17th

22、 pin is low level 0 , otherwise it is the opposite . in the system , because of the reason as switch is the mechanical structure , the contact's elasticity and voltage axon jump and other causes , when the contacts closed or disconnect ,it will appear voltage shaking . in order to eliminate shak

23、ing , to ensure switch recognition accuracy ,using the software method to remove shaking, in the program use the way of make time delayed 0.01 s . when start the program ,it will on initialization settings.such as,the subroutines to identify fortification switches and door switch as follows,taking a

24、dvantage of the program to cycle as the short delay.in the procedure the delay in brief time often complete with delay0 and wait0 sub- procedure. in brief clear, make use of 2 f for circularly and an empty description to complete the eyes j condition type in the variable of delay j<120 is by test

25、 to come out, revise by different according to the cpu clock frequency, because of adoptive cpu in this system is crystal to flap clock frequency to 12 mhzs.when press the fortification switch k1 dot, the door may be is open status or closed status, then link in the switch k2 of door be an in the pr

26、ocedure likely to be high level"1", be an also likely to be low level"0".but system is judged by k2 whethe give an alarm, so it should to made hypothesis these two kinds of circumstances, then carry on a verification, this is the first logic point in issue.second logic crux be, i

27、f robber is after coming in, if close the door, so does the system still rise an action l so have to consider m to is to close the door or open no matter like this in the procedure, as long as don't lock to establish to defend the switch k1 in the 3 mins after coming in, that is after k2 opened.

28、the system will automatically report to the police after 180 ses.so joined a numbering indicator open time in the procedure, solution the first problem needed to establish different open a time value, the beginning starts a status to 1, such as door pass status, then open time be placed to 0, after

29、can get into to circulate scaling.flag is a door switch to mark.lord procedure is as follows:iiiend languageafter repeated experiments , the system completely meets the design requirements.it has been used in residential property , now we completed the installation debugging , the system is accordin

30、g with the requirement of owner. the next is linking each scattered alarms as the next place machine to the control center of upper machine , to realize the remote monitorin , shooting the room corridor happened theft of past personnel is with convenient to solve. application of burglar alarm system

31、 in uptown based on at89c2051 (at89c2051在小区防盗报警系统中的应用)摘要：at89c2051单片机是功能强大的可编程微控器，文中提出了以at89c2051设计的住宅小区防盗报警系统的硬件原理和软件实现。关键词： 微控制器 防盗报警系统at89c2051一： 引言许多人都有个习惯，当长时间外出学习、工作时会将家里的防盗铁门反锁保险，防止窃贼入室，但是普通的防盗铁门即使上了保险，对于橇窃经验丰富的惯犯来说也是小菜一碟，用不了多少时间就能破门而入了。于是提出在门上加装了一个隐蔽的锁控开关，能够使门开后动开始工作，如果是主人就会在三分钟内关闭隐蔽系统，则系统停止

32、工作，如果有盗贼破门行窃，而没找到这个隐蔽的报警系统并关闭它就会在三分钟后自动报警。二：系统实现2.1设计原理如图1所示，用单片机at89c2051作为cpu.实现智能报警。系统由一个设防开关k1，房门开关k2（常闭），单片机at89c2051，5v超小型继电器（ssr）,7805稳压器，报警器等组成。此外可以将报警器进行并联，将进信号直远程联接，实现远程监控。2.2 防盗系统的硬件at89c2051是一个有53字节可编程eprom 的高性能的微控制器(microchip)，与工业标准的mcs51的指令组和引脚兼容，atmel公司生产的at89c2051是一种功能强大的微控制器，它对很多嵌入式

33、控制应用提供了一个高度灵活的有效的解决方案。它有以下特点：2k字eprom、128字节ram、15根i/0线、2个16位定时/计数器、5个向量二级的中断结构、一个全双向的串行口、一个精密的模拟比较器、片内振荡器和时钟电路。at89c2051设计有2个程序保密位，保密位1被编程之后，程序存储器不能再被编程除非做一次擦除，保密位5被编程之后，程序不能被读出。这就对程序的安全性作了一个重要保证，实现程序加密。7805集成稳压电源提供稳定的5v工作电压，且具有体积小、精度高、使用方便、多功能保护、输出电流可扩展等特点，内部有过流、过热和调整管安全工作区保护，以防过载而损坏。固态继电器（solid st

34、ate relay，简称ssr），采用固态元件组装而成的一种新颖的无触点开关器件，具有工作可靠、开关速度快、工作频率高、寿命长、噪声低等特点。报警器所采用的语言芯片sr8803a的最高电压为5v，所以要串入d1、d2后可使电源电压适当降低。k2直接接到门上，门是开状态，则k2为开状态。否则相反。另外加了一个指示灯作为提示，如果门关好,即k2接通,则灯不亮,否则灯指示发亮。表示门未关好。2.3 防盗系统的软件系统采用keiuversion 2语言编程。keilc51标准c编译器为8051微控制器的软件开发提供了c语言环境,同时保留了汇编代码高效,快速的特点。c51已被完全集成到uvision2的

35、集成开发环境中,这个集成开发环境包含：编译器,汇编器,实时操作系统,项目管理器,调试器。而且也是windows下的应用开发软件,界面友好,很适合广大开发人员使用。彩色语法显像和文件辩识都对c源代码进行优化。可以在编辑器内调试程序,它能提供一种自然的调试环境,使你更快速地检查和修改程序。任何控制i/0都是最基本的,而且大部分的应用程序也都需要到i/0,89c2051只有两个i/0口,分别为p1和p3口,这2个接口都可作为单独的输入或输出使用,即每一支i/0脚位都可以作为输入用,也可以做为输出使用。当作为输出时,则每一支脚的外部电路可以高电平1驱动或低电平0驱动。指示灯的显示是由2051的i/0口

36、作为输出时用,当接led发光二极管的引脚为低电平0时,led导通,发灯,由于2051存在输入电流大于输出电流,所以选择让电流流入芯片。在用c编程时,先对i/0设置,如，在本系统中开关只有两种状态,即开和关,在电路中设定,按下设防开关时,即系统在工作状态, 2051的19脚为0电平,否则相反。而门保持关状态,则2051的17脚为低电平0,否则相反。在系统中,由于开关是机械结构,触点的弹性及电压突跳等原因,在触点闭合或断开的瞬间会出现电压抖动。为了去抖动,保证开关识别的准确性,利用软件方法去抖动,在程序中采用时间延迟0.01s。在程序开始时要初始化设置,如，识别设防开关和门开关的子程序如下，利用程序循环来作为短暂延迟。程序中短暂时间的延迟,常以delay（）、wait（）子程序来完成,简单明了,利用二层for循环和一个空叙述来完成延迟的目j变量里的条件式j<120是试验出来的,要依据cpu的时钟频率不同而修正,由于本系统中采用的cpu晶振时钟频率为12mhz。当按下设防开关k1时,房门可能是开状