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室内防盗报警器电路设计

室内防盗报警器电路设计
室内防盗报警器电路设计

室内防盗报警器电路设计

前言

随着科学技术的迅速发展,数字电子技术的概念和分析方法已经渗透并应用许

多种不同的领域中。但,随着科学技术的发展,盗窃团伙的犯案手法也变得层出不穷。他们不是一个落后的团伙,他们也得利用高科技犯案。因而侦破盗窃案,成了公安机关的一大难题。防止盗窃犯罪的发生,不仅是公安机关的责任,普通公民也应该保管看护好自己的财物,以免盗贼有机可乘。特别是那些无人看管的财物,更是为贼人提供了“优异”的作案环境。因而在家中安装防盗报警系统,是预防被盗的有效方法。

当家中无人的时候,家中的贵重物品便成了主心中的“牵挂”。为了更加安心

地出门,在家中安装防盗报警器是最直接的方法。出门前,启动报警器,当有人非法进入内时,触动了早已装置的报警器。报警器,便会制造声响,以吓走盗贼或引起邻居的注意,做到防盗的目的。

但同样令主人头痛的就是,市面上有着各种各样的报警器,选择,是一件难事情,担心这样那样的事情。还有就是它们的性价问题……

通过自行动手,翻阅资料,本人设计了任务要求的具有“记忆”性的红外线家庭防盗声光报警器。在思考和设计过程中,我由浅入深,从认识器件开始到自行改装和设计电路,加深了对所学知识的认识和了解,增长了见识,提高了能力, the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities

bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment of enterprise production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3, strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and stagnation to cure. "The leadership responsible system. Production safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety index assessment, strict implementation of safe production of "one vote veto" award and recognition system, strengthen production safety incentive mechanism (four). Adhere to the political principles against unwholesome tendencies existence of the problem is not strict internal supervision. Over the years, the global leadership team members do not have any illegal and other bad records, but there are still not strict, the implementation does not survive the problem. A few leading cadres not strictly in accordance with the county Party committee, county government On strengthening style construction requirements and style

construction safety supervision system of "ten prohibitions", to solve the people most concerned, the most direct, the most realistic problem of production safety as the starting point and goal of all work, to strengthen internal supervision on the way, in the perfect power control mechanism on "let things drift", get free in the political norms of leading cadres, some involving major principle problems of ambiguous attitude, major issues issues of right and wrong, it cannot stand up bravely, face to face, resolute struggle and discredit the views of the party in 2012. The style of the big consolidation activities, cadres and workers 6 people were

,一,设计电路的功能和主要性能指标 ,1,设计电路的功能

此电路工作时,当红外线发射管照射到红外线接收管的红外光受到遮挡时,红外线接收管导通,启动继电器,继电器的常开开关闭合,报警电路开始工作。喇叭发出“嘀、嘀、嘀……”的警报声,显示灯开始闪烁……此时,即使红外光没有被遮挡,报警电路仍然保持在工作状态,因为启动电路已经把继电器锁上,“记忆”,,不按复位开关,即2电器常开开关不会打开。这样贼人就无法停止报警器“报警”,除非他破坏了电路,。此电路对阻吓贼人较强大的作用,防盗实用较大,制作也不太复杂,操作容易,材料也较容易买到,具有一定的商用价值

,2,设计电路的主要性能指标

A,此电路由6V的直流电源供电。电路也可用6—12V的直流电源,只需要更换

部分元器件即可。

B,电路采用稳定性高的555集成电路组成。IC1是利用输出脚电平的高低来控

制继电器常开开关的开与合。IC2与IC3构多谐振荡器,负责控制闪光灯和喇叭。

C,该电路耗电低,在没有触动报警的情况下,启动电路部分耗电流仅20mA左右;警报电路部分根本不耗电。报警时,启动电路电流达数十mA,报警电路仅为20mA

左右。

D,红外光接收管反应敏捷,受到红外光照射时管子保持截止的状态,当红外光

线被阻截时,管子立即导通,启动继电器工作,即是报警器开始报警。

E,“红外线发射管”和“红外线接收管”两端可以并联多组“红外线发射管”和“红外线接收管”,使其“探测”范围更广。

the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment of enterprise production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3, strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and stagnation to cure. "The leadership responsible system. Production

safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety index assessment, strict implementation of safe production of "one vote veto" award and recognition system, strengthen production safety incentive mechanism (four). Adhere to the political principles against unwholesome tendencies existence of the problem is not strict internal supervision. Over the years, the global leadership team members do not have any illegal and other bad records, but there are still not strict, the implementation does not survive the problem. A few leading cadres not strictly in accordance with the county Party committee, county government On strengthening style construction requirements and style construction safety supervision system of "ten prohibitions", to solve the people most concerned, the most direct, the most realistic problem of production safety as the starting point and goal of all work, to strengthen internal supervision on the way, in the perfect power control mechanism on "let things drift", get free in the political norms of leading cadres, some involving major principle problems of ambiguous attitude, major issues issues of right and wrong, it cannot stand up bravely, face to face, resolute struggle and discredit the views of the party in 2012. The style of the big consolidation activities, cadres and workers 6 people were

(二)单元电路的设计过程 ,1,对报警器进行构想

报警电路该如何工作,如何能让擅闯者触动报警器,报警器该如何开启,通过上互联网查找资料,发现许多报警器的警报系统都是利用集成电路的延时来发出警报声音或者是闪灯,触动后的报警器后不久就会自复位,再次处于警戒状态,我觉得这样不能阻吓贼人,经过考虑,最后确定了初步的方案,

A利用“常开”继电器启动警报电路,使报警电路发出警报闪光和声音。

B 利用感光二极管作为触动开关。

C 报警器工作时,被触动后,报警器的闪灯和喇叭不停工作,以阻吓贼人和引起别人注意。直到主人重新设置报警器为止。

由以上几点,最后决定用555集成电路对设想中的电路进行控制。

,2,理解555集成电路的工作原理,以更好地设计电路。

,3,设计构想中的电路

首先设计继电器的启动电路,利用单个555集成电路的输出端电平的高低以及其复位的作用来控制继电器的开与关。然后设计闪烁灯和喇叭的警报电路,利用两个555集成电路组成的多谐振荡器,对闪烁灯和喇叭发出的声音进行控制,以达到设计的要求。

考虑把“红外线发射管”和“红外线接收管”安装在哪个电路上,以达到最少的影响。最后画出简单的分部电路图,以便进行组合。

,4,根据画出的简图,利用EWB软件进行测试

先对启动电路进行测试,然后对警报电路进行测试,再把“红外线发射管”和“红外线接收管”分别接到电路上,测试其影响,并决定把“红外线发射管”和“红外线接收管”放在哪个电路上,最后把两个电路组合其来,并进行测试。

,5,根据测试的结果得出设计好的电路图。

,6,进一步理解报警电路。

the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment of enterprise production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3, strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and stagnation to cure. "The leadership responsible system. Production safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety index assessment, strict implementation of safe production of "one vote veto" award and recognition system, strengthen production safety incentive mechanism (four). Adhere to the political principles against unwholesome tendencies existence of the problem is not strict internal

supervision. Over the years, the global leadership team members do not have any illegal and other bad records, but there are still not strict, the implementation does not survive the problem. A few leading cadres not strictly in accordance with the county Party committee, county government On strengthening style construction requirements and style construction safety supervision system of "ten prohibitions", to solve the people most concerned, the most direct, the most realistic problem of production safety as the starting point and goal of all work, to strengthen internal supervision on the way, in the perfect power control mechanism on "let things drift", get free in the political norms of leading cadres, some involving major principle problems of ambiguous attitude, major issues issues of right and wrong, it cannot stand up bravely, face to face, resolute struggle and discredit the views of the party in 2012. The style of the big consolidation activities, cadres and workers 6 people were

,三,整机电路和各部分电路的工作原理说明 A,元件清单

名称符号数值单位名称符号电阻R1 510 Ω 喇叭Y 8Ω 6V 电阻 R2

24 kΩ 开关 K1

R

电阻510 Ω 开关 K2

3

电阻R4 20 kΩ NPN三极管 VD1

电阻R5 30 kΩ 555集成电路 IC1

电阻R6 510 Ω 555集成电路 IC2 电阻R7 50 kΩ 555集成电路 IC3

KA;

电阻R8 100 kΩ 继电器 6V,常开;型号,JW1HN

S1

电容C1 0.022 μF 二极管指示灯 L1 绿色

电容C2 100 μF 红外线发射管 L2

电容C3 0.01 μF 红外线接受管 L3 无红外光照射时截止电容C4 0.1 μF 直流电源 E1

电C

0.01 μF 直流电源 E2

容 5

电C

5.8 μF

容 6

B,整机电路的主要功能

整机原理图如下图

the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment of enterprise

production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3, strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and stagnation to cure. "The leadership responsible system. Production safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety index assessment, strict implementation of safe production of "one vote veto" award and recognition system, strengthen production safety incentive mechanism (four). Adhere to the political principles against unwholesome tendencies existence of the problem is not strict internal supervision. Over the years, the global leadership team members do not have any illegal and other bad records, but there are still not strict, the implementation does not survive the problem. A few leading cadres not strictly in accordance with the county Party committee, county government On strengthening style construction requirements and style construction safety supervision system of "ten prohibitions", to solve the people most concerned, the most direct, the most realistic problem

of production safety as the starting point and goal of all work, to strengthen internal supervision on the way, in the perfect power control mechanism on "let things drift", get free in the political norms of leading cadres, some involving major principle problems of ambiguous attitude, major issues issues of right and wrong, it cannot stand up bravely, face to face, resolute struggle and discredit the views of the party in 2012. The style of the big consolidation activities, cadres and workers 6 people were

the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with

responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment of enterprise production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3, strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and stagnation to cure. "The leadership responsible system. Production safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety index assessment, strict implementation of safe production of "one vote veto" award and recognition system, strengthen production safety incentive mechanism (four). Adhere to the political principles against unwholesome tendencies existence of the problem is not strict internal supervision. Over the years, the global leadership team members do not have any illegal and other bad records, but there are still not strict, the implementation does not survive the problem. A few leading cadres

not strictly in accordance with the county Party committee, county government On strengthening style construction requirements and style construction safety supervision system of "ten prohibitions", to solve the people most concerned, the most direct, the most realistic problem

of production safety as the starting point and goal of all work, to strengthen internal supervision on the way, in the perfect power control mechanism on "let things drift", get free in the political norms of leading cadres, some involving major principle problems of ambiguous attitude, major issues issues of right and wrong, it cannot stand up bravely, face to face, resolute struggle and discredit the views of the party in 2012. The style of the big consolidation activities, cadres and workers 6 people were

说明:闭合总开关K1,把K2由“解警”扳到“警戒”位置,报警器开始工作。当

有物体遮挡红外光线时,L2导通,S1自动闭合,继电器被锁上,,警报电路报警灯闪

烁并发出报警声音,“嘀、嘀、嘀……”。

主人回来时,把K2由“警戒”扳到“解警”位置,警报电路S1断开,报警

重新扳到“警戒”,报警器重新进入”待机”状态。停止,

C,部分电路的工作原理说明

1)启动电路

这是一个具有自保记忆性特性的利用二极管截止和导通的警戒开关, 用一只

555集成电路和一只继电器构成。电路如“整机原理图”中的“启动电路”部分所示, 工作前把开关K2扳到“警戒””位置, 于是555集成电路第三脚输出高电平, 继电器KA处于释放状态,报警电路不工作。当有不速之客遮挡红外光时,管子导

通,555第六脚因加上高电平而使输出转换成低电平,于是继电器KA吸动常开触点

开关S1闭合。报警电路接通电源,开始报警。由于该电路具有自锁功能,若不把K2扳到“解警”,复位,,继电器KA恒处于工作状态,于是常开触点S1恒处于闭合状态,因而警报电路不断发出警示。这时,不管“红外线接收管”是否导通,不按复位开关,继电器不会自动释放。把K2扳到“解警”(复位)后,继电器释放,常开触点

S1打开,警报电路因断电而停止工作。

2)警报电路

这是一个多谐振荡器,用两只555集成电路构成。主要是控制闪光的频率和喇

叭发出的声音。

a)555电路的工作原理

555的说明,它是一种时基电路,能在4.5--18V电源下工作,输出电平可与

TTL,CMOS,HTL逻辑电路兼容,振荡精度与外接元件特性有关,具有200MA的吸收或

供出电流,可直接推动扬声器,电感等低电阻负载。555定时器是一种应用极为广泛的中规模集成电路。该电路使用灵活、方便,只需外接少量的阻容元件就可以构成单稳、多谐和施密特触发器。因而广泛用于信号的产生、变换、控制与检测。目前生产的定时器有双极型和CMOS两种类型,其型号分别有 NE555、5G555 、C7555等多种。它们的结构及工作原理基本相同。通常,双极型定时器具有较大的驱动能力,而CMOS定时电路具有底功耗、输入阻抗高等优点。555定时器工作的电源电压很宽,并可承受较大的负载电流。双极型定时器the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment

of enterprise production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3,

strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and stagnation to cure. "The leadership responsible system. Production safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety index assessment, strict implementation of safe production of "one vote veto" award and recognition system, strengthen production safety incentive mechanism (four). Adhere to the political principles against unwholesome tendencies existence of the problem is not strict internal supervision. Over the years, the global leadership team members do not have any illegal and other bad records, but there are still not strict, the implementation does not survive the problem. A few leading cadres not strictly in accordance with the county Party committee, county government On strengthening style construction requirements and style construction safety supervision system of "ten prohibitions", to solve the people most concerned, the most direct, the most realistic problem

of production safety as the starting point and goal of all work, to strengthen internal supervision on the way, in the perfect power control mechanism on "let things drift", get free in the political norms of leading cadres, some involving major principle problems of ambiguous attitude, major issues issues of right and wrong, it cannot stand up bravely, face to face, resolute struggle and discredit the views of the party in 2012. The style of the big consolidation activities, cadres and workers 6 people were

电源电压范围为5—16V,最大负载电流可达200MA,CMOS定时器电源电压为3—18V,最大负载电流在4MA以下。

555定时器是一种功能强大的模拟数字混合集成电路,其组成电路框图,功能表

见表如下,

从555定时器的功能表可以看出,

555定时器有两个阈值,Threshold,电平,分别是1/3VCC和2/3VCC,

输出端为低电平时三极管TD导通, 7脚输出低电平,输出端为高电平时三极管TD截止, 如果7脚接一个上拉电阻, 7脚输出为高电平。所以当7脚接一个上拉电阻时,输出状态与3脚相同555定时器有二个比较器A1和A2,有一个RS触发器,R

和S高电平有效。三极管VT1对清零起跟随作用,起缓冲作用。三极管VT2是放电

管,将对外电路的元件提供放电通路。比较器的输入端有一个由三个5kW电阻组成的分压器,由此可以获得和两个分压值,一般称为阈值。555定时器的1脚是接地

端GND,2脚是低触发端TL,3脚是输出端OUT,4脚是清除端Rd,5脚是电压控制端CV,6脚是高触发端TH,7脚是放电端DIS,8脚是电源端VCC。555定时器的输出端

电流可以达到200mA,因此可以直接驱动与这个电流数值相当的负载,如继电器、扬声器、发光二极管等。

当TH高触发端6脚加入的电平大于 ,TL低触发端2脚的电平大于时,比较器

A1输出高电平,比较器A2输出低电平,触发器置“0”,放电管饱和,7脚为低电平。

the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment of enterprise production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3, strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and

stagnation to cure. "The leadership responsible system. Production safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety index assessment, strict implementation of safe production of "one vote veto" award and recognition system, strengthen production safety incentive mechanism (four). Adhere to the political principles against unwholesome tendencies existence of the problem is not strict internal supervision. Over the years, the global leadership team members do not have any illegal and other bad records, but there are still not strict, the implementation does not survive the problem. A few leading cadres not strictly in accordance with the county Party committee, county government On strengthening style construction requirements and style construction safety supervision system of "ten prohibitions", to solve the people most concerned, the most direct, the most realistic problem of production safety as the starting point and goal of all work, to strengthen internal supervision on the way, in the perfect power control mechanism on "let things drift", get free in the political norms of leading cadres, some involving major principle problems of ambiguous attitude, major issues issues of right and wrong, it cannot stand up bravely, face to face, resolute struggle and discredit the views of the party in 2012. The style of the big consolidation activities, cadres and workers 6 people were

当TH高触发端加入的电平小于 ,TL低触发端的电平大于时,比较器A1输出低电平,比较器A2输出低电平,触发器状态不变,仍维持前一行的电路状态,输出低电平,放电管饱和,7脚为低电平。

当TH高触发端6脚加入的电平小于 ,TL低触发端的电平小于时,比较器A1输出低电平,比较器A2输出高电平,触发器置“1”,输出高电平,放电管截止,7脚为高电平。因7脚为集电极开路输出,所以工作时应有外接上拉电阻,故7脚为高电平。

当从功能表的最后一行向倒数第二行变化时,电路的输出将保持最后一行的状态,即输出为高电平,7脚高电平。只有高触发端和低触发端的电平变化到倒数第三行的情况时,电路输出的状态才发生变化,即输出为低电平,7脚为低电平。

由电路框图和功能表可以得出如下结论,

1,555定时器有两个阈值,分别是和。

2,输出端3脚和放电端7脚的状态一致,输出低电平对应放电管饱和,在7脚外接

有上拉电阻时,7脚为低电平。输出高电平对应放电管截止,在有上拉电阻时,7脚为高电平。

3,输出端状态的改变有滞回现象,回差电压为。

4,输出与触发输入反相。

b)555构成的多谐振荡器

多谐振荡器是一种自激振荡电路,当电路接好后,只要接通电源,再其输出端变可以获得矩形脉冲。

电路图如下,

the provisions of Hunan province safety production supervision and management responsibilities > (Hunan Zhengban made 2013 No. 4), resolutely implement the safety production of the party with responsibility, a pair of responsibility. "Two is issued safety production administration and inspection to promote the responsibilities bear safety production supervision departments strictly and effectively assumed responsibility. The three is the establishment of enterprise production safety hidden With self correction self reporting system, promote the enterprises to implement the main responsibility for production safety. The four is the introduction of strengthening county safety production supervision ability construction work, promote safe production responsibility to the grassroots. 3, strict accountability and target management. Adhere to the "who is in charge, who is responsible for the pipe industry must pipes, pipe production and management must control safety management business must be safe" principle, the implementation of safe production supervision and stagnation to cure. "The leadership responsible system. Production safety of key towns, key enterprises and key problems, by the township government and the Department responsible for the stagnation led the lump sum, to tackle tough. To further increase the production safety

家庭防盗报警系统设计

家庭防盗报警系统设计 1 绪论 1.1家庭报警器发展现状及其系统构成与分类 1.1家庭防盗报警器的发展 从上世纪初,报警系统就已经在北美稍具雏形。在北美,报警呼救箱放置在街头巷尾,在呼救时发出声响提示,以寻求附近警察的帮助;同时,这种呼救箱直接连接到附近的警局,使得稍远一些的警察也能够收到呼救信息。随后,由于通信技术的发展,提供远程通信服务的电报公司加入到这个行业中,从而使得报警信息可以通达到更远的地方;不过,这种电报方式毕竟难以普及,所以稍后出现的电话理所当然地成为报警通讯的主要手段。而此后自动拨号系统的出现以及电话普及到千家万户,更使得通过电话线报警的方式得到了前所未有的发展。 从以上过程来看,报警行业的发展是以工业技术发展为基础的,只有具备良好的通信手段,才能够把各地的报警信息汇聚到相应的权威部门,然后由权威部门负责分配有限的警力来帮助到所有的社会个体。 国外智能监控防盗技术发展已处于一个较高水平阶段,从具有代表性的北美发展过程,可以清楚的看出世界智能监控防盗技术的发展概况。其具有以下特点,值得我们借鉴。 目前,对北美的安防产业来说,最成功的经营模式就是联网报警服务模式,联网报警将整个北美的安防产业从横向到纵向进行整合串并,形成了一个集中许多高科技手段和产业化管理水准的一体化综合性产业。比如世界排名第一,北美最大的安防跨国公司一美国棋诺亚公司,它在世纪年代开始搞简单的防盗报警,其当时的业务范围和技术水平跟中国现在很多安防企业是相当的。到70年代,它对其产业的整体发展方向做了很大的调整,变为联网报警服务商,建立了首家网管中心,尤其是在年代引用了大量的网管技术、系统集成技术和电子技术,现己成为十分先进的联网报警服务平台,它在美国、加拿大、英国、香港、台湾等多个国家和地区都有分公司,北美的客户数己超过600万,2003年防盗报警收入总产值达105亿美元。 第 1 页(共 32 页)

智能无线防盗报警系统的设计

设计与实现
2007

智能无线防盗报警系统的设计
尚建荣 高 敏
(西安邮电学院,陕西 西安,710121) 【摘 要】 利用现有的电话网络,并结合单片机控制技术和射频无线通信以及传
感器技术,开发出了一种适应于智能小区的智能无线报警系统,该系统经济、可靠, 依探头的类型来反映不同的报警信息。他具有广阔的市场前景。实践证明,本文讨论 的系统是可行的、有效的 。 【关键词】 报警 无线 防盗 传感器
随着国家智能化小区建设的推广,防盗系统已成 为智能小区的必需设备。本文运用单片机控制技术和 射频无线通信技术,结合现有的传感器,开发出一种 智能无线防盗系统。 一、系统总体设计 该无线防盗报警系统主要由传感器和报警器组 成。图1为报警器电路组成框图。
存储器
音,以便用户进行适当地处理。当用户挂断电话后, 报警器将此传感器报警时间进行记录,如果同一个传 感器的下一次报警距此次报警的时间间隔大于用户设 定的报警间隔,则报警器进行报警,否则报警器不进 行响应。 二、系统的硬件电路设计 1、无线接收及其解码电路 超再生无线电接收器可以用简单的电路完成无线 电信号的接收和检波,同时他还具有很强的信号放大
振铃检测 DTMF收发 无线 接收模块 解码 CPU
语音控制 电话控制 警笛控制
能力,在无线电遥控电路中有着广泛的应用。我们采 用了超再生无线电接收器电路来实现,如图2 所示。
图1 报警主机系统框图
若某个传感器检测到相应的报警信号后,将该报 警信号传送给无线编码芯片 PT2262,PT2262将自身的 地址码和数据码进行编码后通过射频发射电路发射出 去。当报警器上的射频接收模块接收到该无线信号 后 , 将 其 进 行 放 大 后 送 入 无 线 解 码 芯 片 PT2272, P T2272将自身的地址码和接收信号中的地址进行比较, 只有两者连续两次比较相同时,PT2272向外输出VT信 号将 CPU中断,并将接收到的数据进行锁存。CPU在 收到该中断信号后,对接收到的数据进行判断,如果 该数据是遥控器上的撤防键,则CPU进入撤防状态, 此时,报警器对除烟雾传感器、可燃气体传感器外的 报警信号均不予理睬;如果接收到的是红外传感器的 报警信号,则报警器向用户播放家里有小偷的提示语
图2 射频解码电路
无线接收模块WRX将PT2262发出的无线信号接收 并解调后送入PT2272的输入端, PT2272将接收到的信 号中的地址码和本身的地址码进行比较,如果连续两 次比较正确后向外输出VT 信号,并将接收到的数据码 进行锁存,从D3~D0口输出。 连接在OSC1和OSC2中间的电阻是用来调整PT2272 的时钟频率的,他必须和PT2262的时钟频率相匹配,
- 44 -

宿舍智能防盗防火报警系统与总结分析方案分析方案

编号:F甲0104 2018年山东省大学生电子设计竞赛 F题:宿舍智能防火防盗报警系统 学校:滨州学院 参赛学生:吴衡<) 庞兆杰<) 韩帅<) 专业:电子信息科学与技术 电气工程与自动化 指导教师:齐爱学 宿舍智能防火防盗报警系统

摘要:本系统以ATmega16单片机为主控芯片实现精密全局控制。全系统以总 控台为中心实现了对各房间报警子系统的网络控制。在子系统中通过热释电、烟雾传感器实现了对火灾、非法入室的有力监控,创新使用了无线追踪技术实现了对贵重物品进出的检测,并实现了密码解警等有关功能。总控台应用了多通道无线接收模块NFR24L01,实现了多子系统的无线远程控制,创新使用了无线通讯GSM模块TC35实现了GSM手机远程监控功能,同时使用了上位机技术实现了与PC机的通讯。通过调试与检测完成了题目的基本部分和全部发挥部分的要求并有自己的创新。 关键词:ATmega16、无线追踪、GSM远程监控、上位机 Abstract:Using microcontroller unit (MCU> Atmega16 as master control chip, this system achieves precise overall control of dormitory. The system centers on the head console and takes a networked control of the alarm subsystems in each dorm room. By using the thermoelectric stimulated current (TSC> and smoke transducers in the subsystems, this system manages to monitor fire accidents and break-ins efficiently. In this system, the technique of wireless tracking is applied to detect the in and out of valuables. Besides, the system also carries out the function of removing the alert by typing in the passwords and some other related functions. The head console applies the multichannel wireless receiving module— NFR24L01, so the distance control function of multiple subsystems is realized. The wireless linking GSM module---TC35 is used creatively to realize the distance monitoring function of GSM mobiles. Meanwhile, the upper computer technique in this system makes it possible to link PC and this system together. After debugging and testing, we accomplished the basic part as well as the showing part of the task and added some innovation of our own. Keyword:Amega16, wireless tracking, GSM distance monitoring, upper computer 目录 1.方案的设计与论证(1>1.1稳压电源模块(1> 1.2主控器模块 (2> 1.3异地监控电路模块(2> 2.电路设计(2>

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摘要:随着经济的发展,人们对防盗、防劫、防火保安设备的需求量大大增加。针对偷盗、抢劫、火灾、煤气泄漏等事故进行检测和报警的系统,其需求也越来越高。本设计是利用单片机对防盗报警系统进行控制,为满足学生宿舍具体到设计时,又分硬件设计和软件设计,硬件设计主要分两大部分:单片机部分和检测部分。软件设计分主程序设计和中断子程序设计。在完成正文部分后,主要工作就是要进行调试,为了实现设计预计现象,软件和硬件都要作必要的修改。 关键词:单片机;报警器;红外线传感器 目录 绪论 (1) 1项目方案设计 (2) 1.1项目概述 (2) 1.2设计原则 (2) 1.3设计依据及规范 (2) 1.4设计参数 (3) 1.5设计目标 (3) 1.6确定报警器方案 (4) 1.7报警总体框图 (5) 2防盗报警器硬件电路设计 (5) 2.1电源电路设计 (5) 2.2报警电路的设计 (5) 错误!未定义书签。 错误!未定义书签。 错误!未定义书签。 错误!未定义书签。

错误!未定义书签。 错误!未定义书签。 2.3报警器的设备选择及清单 (7) ............................... 错误!未定义书签。 ............................... 错误!未定义书签。 错误!未定义书签。 错误!未定义书签。 3报警器的软件设计及程序 (10) 3.1主程序流程图 (10) 3.2中断函数流程图 (11) 3.3 软件编写程序见附录 (11) 4报警器的安装与调试 (11) 4.1报警器的安装 (11) 4.2报警器的调试 (12) 5报警器的特点 (12) 结论 (12) 致谢 (13) 附录 (15)

基于单片机的智能家居防火防盗报警系统毕业设计

基于单片机的智能家居防火防盗 报警系统

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Abstract With society’s progress and development of science and technology, economy, people's living standard has been greatly improved. People pay more attention to personal safety, thus they put forward new requirements for the fire and security measures. In this design ,the intelligent family- house control system includes this function : indoor information intelligent monitoring , the input and real-time display ,sound and light alarm, and so on .The design is a fire and security system, which combines sensor technology with microcontroller. This design adopts the DYP-ME003 human body infrared sensor module,18b20 temperature sensor and MQ_2 smoke sensor to detection signal. These sensor send the signals to microcontroller process these signal and drive alarm circuit to achieve sound and light alarm .The fir temperature and smoke concentration are initialized in this system.,and are displayed in the LED display .The system has the advantages of simple structure ,stable performance ,conventional operation ,low price ,and has a certain practical value . Keywords : The fire and security system,18b20,MQ_2,DYP-ME003

基于单片机设计的温度报警系统毕业设计

单片机设计的温度报警器

毕业设计(论文)原创性声明和使用授权说明 原创性声明 本人郑重承诺:所呈交的毕业设计(论文),是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知,除文中特别加以标注和致谢的地方外,不包含其他人或组织已经发表或公布过的研究成果,也不包含我为获得及其它教育机构的学位或学历而使用过的材料。对本研究提供过帮助和做出过贡献的个人或集体,均已在文中作了明确的说明并表示了谢意。 作者签名:日期: 指导教师签名:日期: 使用授权说明 本人完全了解大学关于收集、保存、使用毕业设计(论文)的规定,即:按照学校要求提交毕业设计(论文)的印刷本和电子版本;学校有权保存毕业设计(论文)的印刷本和电子版,并提供目录检索与阅览服务;学校可以采用影印、缩印、数字化或其它复制手段保存论文;在不以赢利为目的前提下,学校可以公布论文的部分或全部内容。 作者签名:日期:

学位论文原创性声明 本人郑重声明:所呈交的论文是本人在导师的指导下独立进行研究所取得的研究成果。除了文中特别加以标注引用的内容外,本论文不包含任何其他个人或集体已经发表或撰写的成果作品。对本文的研究做出重要贡献的个人和集体,均已在文中以明确方式标明。本人完全意识到本声明的法律后果由本人承担。 作者签名:日期:年月日 学位论文版权使用授权书 本学位论文作者完全了解学校有关保留、使用学位论文的规定,同意学校保留并向国家有关部门或机构送交论文的复印件和电子版,允许论文被查阅和借阅。本人授权大学可以将本学位论文的全部或部分内容编入有关数据库进行检索,可以采用影印、缩印或扫描等复制手段保存和汇编本学位论文。 涉密论文按学校规定处理。 作者签名:日期:年月日 导师签名:日期:年月日

(完整word版)智能家居防盗报警系统的设计.

摘要 随着科技的飞速发展,人们的工作、生活中涌现出各种各样的科技产品,其中的电子产品更是花样繁多、遍及工作、生活的方方面面。智能家居防盗报警系统是近年来发展极为迅速、应用面极广的防盗报警控制系统,它具有控制能力强、操作方便灵活、可靠性高、适应能力强的特点。 本文介绍了一款易于扩展的基于单片机的家居智能防盗报警系统, 用较低的成本实现家居的高安全性。主要由AT89C52单片机、热释电传感器、信号处理电 路、蜂鸣器语音报警电路、LED显示电路等部分组成。系统主要功能是防盗报警,它由热释电传感器作为探测器,将信号输入单片机中,判断是否有危情,若有则利用蜂鸣器报警。中断申请后再查询的方式使系统的误报率有效降低,并使系统的可靠性大为增强,因而在智能家居防盗报警系统中极具发展前景。本文给出了该家居防盗报警系统的硬件组成,阐述了系统工作方式,并给出主程序和子程序的流程图。 关键词:单片机;防盗报警;传感器 I Abstract With the rapid development of science and technology, all kinds of products emerge in people's work and life including various electronic products. The system of intellectual home anti-theft alarm is an anti-theft alarm control system which has developed very quickly in recent years and is applied widely.This characters of the system is the enough ability to control, convenient and flexible to operate, high reliability and adaptability. This paper introduces a set of intellectual home anti-theft alarm system based on microcontroller with lower cost to achieve the high-security home environment. It mainly consists of four parts which are the AT89C52, the pyroelectric sensor, signal processing circuit, alarming circuit by buzzer,displaying circuit by LED and so on. The main function of this system is to alarm when the home is in danger. It uses the pyroelectric sensor as a detector,transports the signal into the microcontroller to tell whether the home is dangerous.If the home is in danger ,the system would alarm by buzzer. Due to the design of the inquiries of interruption before the usage of query, the false alarm rate is reduced effectively and the reliability of the system is greatly increased,which is applied widely in the anti-theft alarm system of intellectual home. The paper gives the hardware components of the system, illustrates the work way of the system, and gives the flow chart of main program and subroutine. Key words: Microcontroller; Anti-theft Alarm; Sensor II

学生宿舍防盗报警器

机械项目测试技术基础 课程设计 正常状态 报警状态 目录 1 引言2 1.1 设计任务与要求2 2 方案设计3 2.1 总体设计思路3 2.2. 具体电路模块设计4 2.2.1 热释电红外传感器原理4 2.2.2 放大电路的设计4 2.2.3 时钟电路的设计4 2.2.4 复位电路的设计5 2.2.5 发光二极管报警电路的设计6 2.2.6蜂鸣器报警电路的设计6学校:洛阳理工学院专业:模具设计与制造班级: Z090358 姓名:张新建

2.3 系统硬件电路的选择及说明7 3软件的程序实现8 3.1 主程序工作流程图8 3.2 中断服务程序工作流程图9 4 软件仿真9 5 总结10 参考文献11 1 引言 随着社会的进步和经济的发展,人民的物质生活水平有了很大提高。生活在高校宿舍的大学生们所拥有的贵重物品如笔记本电脑、Mp4、数码相机等也越来越多。一些不法分子利用学校没有在学生宿舍安装防盗系统的漏洞,频频侵入大学生宿舍入室盗窃学生贵重财物,给不少同学造成巨大财产损失,人们对此深恶痛绝! 然而,现实的情况却令大学生们感到沮丧:图书馆早已安装有比较成熟的防盗系统,教案楼等其它地方虽也未安装防盗系统但那是没有必要所致,唯有大学生宿舍这块儿,学校出于种种现实考虑,短期内我们也看不到安装的迹象。 因此,大学生自己研制出一种制作简单、成本低、安装方便,并且防盗性能比较稳定,灵敏度高,抗干扰能力较强,安全可靠的防盗报警器用于自我保护就十分必要了。 本设计就是为了满足大学生宿舍防盗的需要而设计的电子防盗系统。 1.1 设计任务与要求 (1>该设计模块划分为数据采集模块、键盘控制模块、报警电路模块等。 (2>本红外线防盗报警系统由热释电红外传感器、报警器、单片机控制电路、LED 控制电路及相关的控制管理软件组成。用户终端完成信息采集、处理、数据传送、功能设定、本地报警等功能。终端由中央处理器、输入模块、输出模块、通信模块、功能设定模块等部分组成。 (3>系统可实现功能。当宿舍内所有学生都外出时,可把报警系统设置在外出布防状态,探测器工作起来;当有窃贼闯入时,热释电红外传感器将探测到有人靠近,设置在监测点上的红外探头将人体辐射的红外光谱转变成电信号,经放大电路、比较电

毕业设计(论文)-基于AT89C51单片机的家庭防盗报警系统设计

目录 1 绪论 (1) 1.1发展概况与设计背景 (1) 1.2本设计概述 (2) 2总体设计方案........................................................... . (3) 2.1方案选择论证....................................................... . (3) 2.2主控芯片单片机的选择....................................... . (3) 2.2.1 AT89C51的主要性能 (4) 2.2.2 AT89C51的引脚结构 (5) 2.3传感器的选择 (6) 2.3.1传感器的红外辐射与红外探测的原理结构 (7) 2.3.2红外测温原理 (7) 2.3.3热释红外传感器的结构 (8) 2.3.4 菲涅尔透镜 (10) 2.4热释电红外传感器控制电路芯片的选择 (11) 3 系统硬件设计 (13) 3.1低频带通放大电路 (13) 3.2电压比较整形电路 (14) 3.2.1双限电压比较器的工作原理 (14) 3.3报警电路 (15) 3.4灯光警示电路 (16) 3.5状态显示电路 (17) 3.6供电电源电路 (17) 3.7单片机最小系统 (18) 4 系统软件 (19) 4.1主程序流程图 (19) 4.2中断函数流程图 (20) 5结论 (21) 致谢 (22) 参考文献 (23) 附录一:系统电路图 (24) 附录二:系统程序 (25)

1 绪论 1.1发展概况与设计背景 随着社会的不断进步和科学技术、经济的不断发展,人们生活水平得到很大的提高,人们私有财产也不断地增多,因而也对防盗措施提出了新的要求。 从现代人们住宅发展的趋势来看,现代人们住宅主要是向群体花园式住宅区发展,向高空中发展,一般都是一个住宅区有几栋至几十栋以上,但目前市面上所拥有的家庭电子防盗报警器,只能用于单一的住宅单元,不利于统一管理,而且也不能满足现代住宅区的发展要求,所以很有必要对家庭电子防盗报警器进一步完善和提高。 本设计就是为了满足现代住宅防盗的需要而设计的家庭式电子防盗系统。它在以前的防盗器基础上进行了很大的改进,不但可以用于单一的住宅区,也可以规模用于比较大规模住宅区的防盗系统,它的工作性能好,不易出现不报和误报现象,安全可靠。不仅如此,它使用了单片机做信号处理器,这样有利于与计算机相连接,利用计算机统一管理,使整个小区的住户基本情况、资料等在计算机内存储起来,方便来访人的查询和保安人员的统一管理。 目前市面上装备主要有压力触发式防盗报警器、开关电子防盗报警器和压力遮光触发式防盗报警器等各种报警器,但这几种比较常见的报警器都存在一些缺点:(一)压力触发式防盗报警器由于压力板式安装在垫子内,当主机停止工作,主人在家走动时,都很容易失报和误报,其可靠性低。(二)开关式电子防盗报警器一般只有一个定点,有效范围小,而且各种开关也易坏,失报和误报率就高,不可靠。(三)遮光式触发防盗报警器在受到太阳光照射就会引起误报,同时如果由于风吹窗帘的摆动等遮住了光也会引起误报,所以这种报警器的可靠性也不高。再者,就闭路监控电路防盗系统而言:它的安装线路复杂,而且技术要求比较高,价格也比较昂贵,不利于广泛利用。 1.2本设计概述 综合以上报警器的不足,本系统采用了热释电红外传感器,它的制作简单、成本低,安装比较方便,而且防盗性能比较稳定,抗干扰能力强、灵敏度高、安全可靠。这种防盗器安装隐蔽,不易被盗贼发现。同时它的信号经过单片机系统处理后利于跟PC机通信,便于多用户统一管理。

防盗报警器的设计 毕业设计

南京信息职业技术学院 毕业设计论文 作者张凤闯学号 11212P49 题目防盗报警器的设计 指导教师张园 评阅教师 完成时间: 2015年 4 月 17日 毕业设计(论文)中文摘要

(题目):防盗报警器的设计 摘要:随着现代电子信息的高速发展,社会治安相对于以前已经有了非常大的改善。但是在一些地方还是时不时会出现一些入室盗窃事件,这些地方都需要我们做好安全防护措施。目前大多的防盗报警装置都是安装在比较大型范围的场所,适合安装在家庭的比较少。而家庭报警器不仅需要有报警装置,还需要其他的扩展功能。本文考虑到家庭的实际情况,考虑到51单片机,体积小,价格低等特点,设计出实现一款适合大多数家庭的家庭防盗报警器。 本文设计了一款基于AT89C51单片机的家庭防盗报警器,该系统利用热电型红外传感器监控家里面的情况,并且如果家里面发送盗窃是可以及时将信息传递给主人,具有高效,方便,快速等特点。因为本设计采用的是红外传感器检测, 所以可以实时检测信号, 遇到危险可以立即报警。并可以在并LCD上显示危险。该系统选用AT89C51单片机,遥控控制系统开始检测和结束检测,方便主人,系统终端部分选用是蜂鸣器报警电路和LCD液晶显示。 关键词:AT89C51;按键控制;12864液晶显示;红外传感器 毕业设计(论文)外文摘要

Title: Design of anti-theft Abstract:With the rapid development of modern electronic information, relative to the previous social security have the very big improvement. But in some places still from time to time there will besome burglary incident, all we need to do security measures. At present, most of the anti-theft alarm device is installed in the large range of places, suitable for installation in the family is relatively small. While the family alarm not only needs to have the alarm device, also need to expand other functions. In this paper, considering the actual situation of the family, taking into account the 51 microcontroller, small size, low price, design and implement a home burglar alarm for most families. In this paper, a design based on AT89C51 microcontroller family anti-theft alarm, the system uses infrared pyroelectric sensor monitoring inside the house, and if the home theft can betransmitted timely information to the owner, has the advantages of high efficiency, convenient,fast and other characteristics. Because of this design is based on infrared sensor, so it can bereal-time signal detection, can immediately alarm meet danger. And can be in danger and shown on LCD. The system uses AT89C51 SCM, remote control system testing and detection of end, easy to master, the terminal part of the selection system is a buzzer alarm circuit and LCD display. keywords:AT89C51 button control;12864; liquid crystal display; infrared sensor

火灾报警系统的设计毕业设计

本 科毕业设计 (自然科学) 题 目:火灾报警系统的设计(偏硬) Hebei Normal University of Science & Technology 专业:电气工程及其自动化 学号:93110070121

毕业设计(论文)原创性声明和使用授权说明 原创性声明 本人郑重承诺:所呈交的毕业设计(论文),是我个人在指导教师的指导下进行的研究工作及取得的成果。尽我所知,除文中特别加以标注和致谢的地方外,不包含其他人或组织已经发表或公布过的研究成果,也不包含我为获得及其它教育机构的学位或学历而使用过的材料。对本研究提供过帮助和做出过贡献的个人或集体,均已在文中作了明确的说明并表示了谢意。 作者签名:日期: 指导教师签名:日期: 使用授权说明 本人完全了解大学关于收集、保存、使用毕业设计(论文)的规定,即:按照学校要求提交毕业设计(论文)的印刷本和电子版本;学校有权保存毕业设计(论文)的印刷本和电子版,并提供目录检索与阅览服务;学校可以采用影印、缩印、数字化或其它复制手段保存论文;在不以赢利为目的前提下,学校可以公布论文的部分或全部内容。 作者签名:日期:

独创声明 本人郑重声明:所呈交的毕业设计(论文),是本人在指导老师的指导下,独立进行研究工作所取得的成果,成果不存在知识产权争议。尽我所知,除文中已经注明引用的内容外,本设计(论文)不含任何其他个人或集体已经发表或撰写过的作品成果。对本文的研究做出重要贡献的个人和集体均已在文中以明确方式标明。 本声明的法律后果由本人承担。 作者签名: 二〇一〇年九月二十日 毕业设计(论文)使用授权声明 本人完全了解滨州学院关于收集、保存、使用毕业设计(论文)的规定。 本人愿意按照学校要求提交学位论文的印刷本和电子版,同意学校保存学位论文的印刷本和电子版,或采用影印、数字化或其它复制手段保存设计(论文);同意学校在不以营利为目的的前提下,建立目录检索与阅览服务系统,公布设计(论文)的部分或全部内容,允许他人依法合理使用。 (保密论文在解密后遵守此规定) 作者签名: 二〇一〇年九月二十日

#基于单片机的家庭防盗报警系统的设计

目录 一、设计要求 (1) 二、设计目的 (1) 三、设计的具体实现 (1) 1、系统概述 (1) 2、单元电路设计 (1) 3、软件程序设计 (4) 四、结论和展望 (6) 五、心得体会和建议 (7) 六、附录 (8) 七、参考文献 (8) 家庭防盗报警系统设计报告 一、设计要求

1、当安全状态下,绿灯亮,表示安全;有人入室盗窃时候,感应 器(本设计用开关K0代替,合上为有人入室盗窃)自动感应,并向单片机输入信号。 2、当检测到有人入室盗窃的信号输入,显示入室盗窃的指示灯, 并响起扬声器通知,一定时间后自动恢复安全状态。 3、当人为手动停止(用开关K1代替),则恢复安全状态。 二、设计目的 1、实现入室盗窃的监控及自动报警功能 2、报警一段时间(本次设计设置为10S)后自动恢复安全状态 3、具有手动停止报警器和报警灯,然后恢复正常状态的功能 三、设计的具体实现 1、系统概述 本家庭防盗报警系统设计包括硬件设计和软件设计两部分。硬件设计部分主要由一片AT89C51单片机芯片和三个功能子电路共同构成,三个功能子电路分别为:1)晶振输入电路,2)安全状态显示及自动检测电路,3)报警响应及手动复位电路,和软件一起作用,实现家庭防盗的自动检测和报警功能。 工作原理: 2、单元电路设计 本家庭防盗报警系统主要由一片AT89C51单片机和三个子电路组成,共同和软件设计配合完成对家庭防盗并且自动报警的智能控制。其中三个子电路设计如下: 1)晶振输入电路

图1—1 晶振输入电路 上图1—1所示为晶振输入电路,图中19和18引脚分别为XTAL1、XTAL2,他们分别接晶振的输入和输出。因为一个机器周期含有6个状态周期,而每个状态周期为2个振荡周期,所以一个机器周期共有12个振荡周期。本设计选择晶振频率为12MHz,输入芯片震荡周期为1/12μs,一个机器周期为1μs。 2)安全状态显示及自动检测电路

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