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1、AbstractInthedailylifeandthework,themeanswhichthehousinganddepartment'ssafeguard,unit'sdocumentfile,thefinancialreportformaswellassomeindividualmaterialpreservationmanylockssolves.Ifusetraditionmechanicalkeyunblanking,thepeopleoftenmustcarrymanythekey,theuseisnotextremelyconvenient,afterals
2、othekeylosesthesecuritynamelytosellatadiscountgreatly.Unfoldsunceasinglyalongwiththescienceandtechnology,inpeople'sismoreandmorehightodailylifesafeinsurancecomponentrequest.Inordertosatisfythepeopleblockagetheoperationrequirements,increasesitssecurity,replacesthekeywiththepasswordthepasswor
3、dlocktoariseatthehistoricmoment.Thepasswordlockingdevicektopreventgoinginhasthesecurityhigh,thecostlow,thepowerlosslow,easytooperateandsoonthemerits.Thisarticleintroducedmanufacturesthedesignsystemusingat89S51monolithicintegratedcircuitwhichasimplepasswordlocks.Inthearticlefirstintroducedth
4、isdesigndesignmentalityandthedesignproposal,itmainlydividesintothreebigmodules:Keyboardcontrolmodule,nixietubedemonstrationmodule,passwordcomparisonmodule.Thenhasmadethedetailedintroductiontothemainchip.Finallynarratedthesystemhardwarepartcomprehensively,thesoftwarepart.ThissystemusestheCla
5、nguagetocarryonthesoftwaredesign,andencloseddetailedprogrammingdiagram,flowchart,concreteprocedure.Thisdesignmayrealizeitsfunction,causesthesystemtohavethepracticalapplication,theuserfriendly,theintellectualization.Keyword:Monolithicintegratedcircuit;;Passwordlock;STC89C521.緒論1.1課題背景隨著社會(huì)物質(zhì)財(cái)
6、富的日益增長(zhǎng),安全防盜已成為社會(huì)問(wèn)題。而鎖自古以來(lái)就是把守門(mén)戶的鐵將軍,人們對(duì)它的要求甚高,既要安全可靠的防盜,又要使用方便,這也是制鎖者長(zhǎng)期以來(lái)研制的主題。目前國(guó)內(nèi),大部分人使用的還是傳統(tǒng)的機(jī)械鎖。然而,眼下假冒偽劣的機(jī)械鎖泛濫成災(zāi),互開(kāi)率非常之高。所謂互開(kāi)率,是各種鎖具的一個(gè)技術(shù)質(zhì)量標(biāo)準(zhǔn),也就是1把鑰匙能開(kāi)幾把鎖的比率。經(jīng)國(guó)家工商局、國(guó)家內(nèi)貿(mào)局、中國(guó)消協(xié)等部門(mén)對(duì)鎖具市場(chǎng)的調(diào)查,發(fā)現(xiàn)個(gè)別產(chǎn)品的互開(kāi)率居然超標(biāo)26倍。為何彈子鎖的“互開(kāi)率”會(huì)如此之高?據(jù)有關(guān)專家人士剖析,彈子鎖質(zhì)量好壞主要取決于彈子數(shù)量的多少以及彈子的大小,而彈子的多少和大小受一定條件的限制。此外,即使是一把質(zhì)
7、量過(guò)關(guān)的機(jī)械鎖,通過(guò)急開(kāi)鎖,甚至可以在不損壞鎖的前提下將鎖打開(kāi)。機(jī)械鎖的這些弊端為一種新型的鎖——電子密碼鎖,提供了發(fā)展空間。1.2電子密碼鎖電子鎖是采取電子電路控制,以電磁鐵或者衛(wèi)星電機(jī)和鎖體作為執(zhí)行裝置的機(jī)電體化鎖具,相比傳統(tǒng)的機(jī)械鎖具,電子鎖不使用金屬鑰匙,保密性、精度都有很大提高。電子鎖的發(fā)明思路,源自古代發(fā)明的自機(jī)械,例如古希臘數(shù)學(xué)家赫倫的液壓自動(dòng)門(mén),中國(guó)古代諸葛亮的水牛流馬,它們以重力或蒸汽壓力驅(qū)動(dòng),最廣泛的用途乃是用在古代墓道的地下機(jī)關(guān)。電子工業(yè)的誕生,使得以微小電量驅(qū)動(dòng)機(jī)械成為可能,于是