automated-parking-system.rar

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Project for car parking sensor
automated-parking-system.rar
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内容介绍
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/62532e0574bc5c0105ea1fa6/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62532e0574bc5c0105ea1fa6/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x2 h3 y2 ff2 fs1 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h2 y3 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x3 h4 y4 ff3 fs2 fc0 sc0 ls0 ws0">Study on <span class="ls1">Au</span>tom<span class="_ _0"></span>ated <span class="_ _1"></span>Car <span class="_ _2"></span>Pa<span class="_ _2"></span>rki<span class="_ _0"></span>ng <span class="_ _1"></span>S<span class="_ _0"></span>y<span class="_ _2"></span>ste<span class="ls2">m <span class="_ _2"></span></span>Based<span class="_ _2"></span> on </div><div class="t m0 x4 h4 y5 ff3 fs2 fc0 sc0 ls0 ws0">Micro<span class="_ _2"></span>contro<span class="_ _2"></span>ller</div><div class="t m0 x5 h4 y6 ff3 fs2 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h2 y7 ff1 fs0 fc0 sc0 ls0 ws0"> </div><div class="t m0 x6 h5 y8 ff1 fs3 fc0 sc0 ls0 ws0">Mohmm<span class="_ _0"></span>ed Ahmed Mohmm<span class="_ _0"></span>ed Ahmed </div><div class="t m0 x7 h2 y9 ff1 fs0 fc0 sc0 ls0 ws0">Department <span class="_ _3"></span>of E<span class="_ _2"></span>lectronic E<span class="ls3">ngi</span>n<span class="ls4">ee</span>rin<span class="ls5">g,</span> <span class="_ _3"></span> </div><div class="t m0 x6 h2 ya ff1 fs0 fc0 sc0 ls0 ws0">Tia<span class="_ _2"></span>n<span class="_ _0"></span>j<span class="_ _2"></span>in Un<span class="ls6">iv</span>e<span class="ls7">rs</span>i<span class="ls6">ty<span class="_ _0"></span><span class="ls0"> <span class="_ _3"></span>of T<span class="_ _2"></span>echn<span class="ls3">ol</span>ogy <span class="_ _3"></span>and </span></span></div><div class="t m0 x8 h2 yb ff1 fs0 fc0 sc0 ls0 ws0">Educatio<span class="ls5">n,</span> <span class="_ _3"></span>T<span class="_ _2"></span>ianjin<span class="_ _2"></span>, </div><div class="t m0 x9 h6 yc ff1 fs4 fc0 sc0 ls3 ws0">300222<span class="_ _2"></span><span class="ls0"> </span></div><div class="t m0 xa h6 yd ff1 fs4 fc0 sc0 ls0 ws0"> </div><div class="t m0 xb h5 y8 ff1 fs4 fc0 sc0 ls0 ws0"> <span class="fs3">Wa<span class="_ _2"></span>ng Guan<span class="_ _2"></span>g W<span class="ls6">ei</span> </span></div><div class="t m0 xc h2 y9 ff1 fs0 fc0 sc0 ls0 ws0">Department <span class="_ _3"></span>of <span class="_ _2"></span>Electronic <span class="_ _3"></span>Engin<span class="ls4">ee</span>rin<span class="ls5">g,</span> <span class="_ _3"></span> </div><div class="t m0 xd h2 ya ff1 fs0 fc0 sc0 ls0 ws0">Tia<span class="_ _2"></span>n<span class="_ _0"></span>j<span class="_ _2"></span>in Un<span class="ls6">iv</span>e<span class="ls7">rs</span>i<span class="ls6">ty<span class="_ _0"></span><span class="ls0"> <span class="_ _3"></span>of T<span class="_ _2"></span>echn<span class="ls3">ol</span>ogy <span class="_ _3"></span>and </span></span></div><div class="t m0 xe h2 yb ff1 fs0 fc0 sc0 ls0 ws0">Education, <span class="_ _3"></span>Tia<span class="_ _2"></span>njin, </div><div class="t m0 xf h2 ye ff1 fs0 fc0 sc0 ls0 ws0">300<span class="_ _2"></span>222 </div><div class="t m0 x10 h6 yf ff1 fs4 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h7 y10 ff3 fs5 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 h8 y11 ff3 fs6 fc0 sc0 ls0 ws0">Abstract <span class="fs7"> </span></div><div class="t m0 x1 h9 y12 ff3 fs1 fc0 sc0 ls0 ws0">This paper <span class="_ _2"></span><span class="ls8">ha</span>s shown <span class="_ _2"></span>the concept of<span class="_ _2"></span> an automati<span class="_ _2"></span>c </div><div class="t m0 x1 h9 y13 ff3 fs1 fc0 sc0 ls0 ws0">car <span class="_ _4"> </span>parking <span class="_ _4"> </span>system. <span class="_ _5"> </span>Everything <span class="_ _4"> </span>in <span class="_ _4"> </span>the <span class="_ _4"> </span>modern </div><div class="t m0 x1 h9 y14 ff3 fs1 fc0 sc0 ls0 ws0">world <span class="_ _6"></span>is <span class="_ _3"></span>goi<span class="_ _2"></span>ng <span class="_ _3"></span>automatic, <span class="_ _6"></span>we <span class="_ _6"></span>have <span class="_ _3"></span>buil<span class="_ _2"></span>t <span class="_ _3"></span>a <span class="_ _3"></span>system<span class="_ _2"></span> </div><div class="t m0 x1 h9 y15 ff3 fs1 fc0 sc0 ls0 ws0">which <span class="_ _6"></span>can <span class="_ _6"></span>automat<span class="_ _2"></span>ically <span class="_ _3"></span>sense <span class="_ _6"></span>the <span class="_ _6"></span>ent<span class="_ _2"></span>ry <span class="_ _3"></span>and <span class="_ _6"></span>exit </div><div class="t m0 x1 h9 y16 ff3 fs1 fc0 sc0 ls0 ws0">of <span class="_ _4"> </span>cars <span class="_ _5"> </span>through <span class="_ _4"> </span>the <span class="_ _4"> </span>gate <span class="_ _4"> </span>and <span class="_ _5"> </span>then <span class="_ _4"> </span>display <span class="_ _4"> </span>t<span class="_ _2"></span>he </div><div class="t m0 x1 h9 y17 ff3 fs1 fc0 sc0 ls0 ws0">number of<span class="_ _2"></span> cars in the <span class="_ _2"></span>parking lot. <span class="_ _2"></span>T<span class="_ _0"></span>his <span class="_ _2"></span>automated </div><div class="t m0 x1 h9 y18 ff3 fs1 fc0 sc0 ls0 ws0">car <span class="_ _5"> </span>parking <span class="_ _5"> </span>system<span class="_ _2"></span> <span class="_ _4"> </span>reduces <span class="_ _7"> </span>the <span class="_ _5"> </span>time <span class="_ _7"> </span>taken <span class="_ _5"> </span>to </div><div class="t m0 x1 h9 y19 ff3 fs1 fc0 sc0 ls0 ws0">check <span class="_ _8"> </span>the <span class="_ _8"> </span>space <span class="_ _9"> </span>for <span class="_ _8"> </span>vehicles<span class="_ _2"></span> <span class="_ _8"> </span><span class="ls9"> </span>by <span class="_ _8"> </span>displaying <span class="_ _9"> </span>the </div><div class="t m0 x1 h9 y1a ff3 fs1 fc0 sc0 ls0 ws0">available <span class="_ _6"></span>spaces <span class="_ _1"></span>for <span class="_ _1"></span>parking <span class="_ _6"></span>on <span class="_ _6"></span>a <span class="_ _1"></span>LCD <span class="_ _3"></span>dis<span class="_ _2"></span>play<span class="lsa">er</span> </div><div class="t m0 x1 h9 y1b ff3 fs1 fc0 sc0 ls0 ws0">by <span class="_ _6"></span>using <span class="_ _1"></span>inf<span class="_ _2"></span>ra <span class="_ _6"></span>red <span class="_ _1"></span>(IR) <span class="_ _1"></span>sensors <span class="_ _6"></span><span class="lsb"> </span>inst<span class="_ _2"></span>alled <span class="_ _6"></span>at <span class="_ _1"></span>the </div><div class="t m0 x1 h9 y1c ff3 fs1 fc0 sc0 ls0 ws0">entrance <span class="_ _2"></span>and <span class="_ _3"></span>exit. <span class="_ _2"></span>This <span class="_ _2"></span>project<span class="_ _2"></span> <span class="_ _2"></span>is <span class="_ _2"></span>developed <span class="_ _3"></span>using </div><div class="t m0 x1 h9 y1d ff3 fs1 fc0 sc0 ls0 ws0">89c52 microcontroll<span class="_ _2"></span>er. </div><div class="t m0 x1 ha y1e ff3 fs6 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 ha y1f ff3 fs6 fc0 sc0 ls0 ws0">Introduction </div><div class="t m0 x1 hb y20 ff1 fs8 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1 hc y21 ff1 fs1 fc0 sc0 ls0 ws0">Car <span class="_ _8"> </span>parking <span class="_ _8"> </span>i<span class="_ _2"></span>ssu<span class="_ _0"></span>e <span class="_ _9"> </span>has <span class="_ _9"> </span>some <span class="_ _8"> </span>problems <span class="_ _9"> </span>with <span class="_ _8"> </span>how <span class="_ _9"> </span>to </div><div class="t m0 x1 hc y22 ff1 fs1 fc0 sc0 ls0 ws0">control <span class="_ _7"> </span>the <span class="_ _7"> </span>number <span class="_ _7"> </span>of <span class="_ _7"> </span>the <span class="_ _7"> </span>car <span class="_ _7"> </span>inside <span class="_ _7"> </span>it, <span class="_ _7"> </span>how <span class="_ _7"> </span>to </div><div class="t m0 x1 hc y23 ff1 fs1 fc0 sc0 ls0 ws0">monitor <span class="_ _2"></span>t<span class="_ _2"></span>h<span class="_ _0"></span>e <span class="_ _3"></span>mov<span class="_ _0"></span>ement <span class="_ _3"></span>in/out <span class="_ _3"></span>side <span class="_ _2"></span>of <span class="_ _3"></span>the <span class="_ _2"></span>parking <span class="_ _3"></span>lot<span class="lsc">, </span></div><div class="t m0 x1 hc y24 ff1 fs1 fc0 sc0 ls0 ws0">how to <span class="_ _2"></span>check<span class="_ _0"></span> <span class="_ _2"></span>whether there is <span class="_ _2"></span><span class="lsd">a <span class="_ _2"></span></span>place inside for more </div><div class="t m0 x1 hc y25 ff1 fs1 fc0 sc0 ls0 ws0">cars <span class="_ _1"> </span>or <span class="_ _8"> </span>not <span class="_ _8"> </span>and <span class="_ _1"> </span>the <span class="_ _8"> </span>safety<span class="_ _0"></span> <span class="_ _8"> </span>to <span class="_ _8"> </span>park. <span class="_ _1"></span>The <span class="_ _1"> </span>ai<span class="_ _2"></span>m<span class="_ _0"></span> <span class="_ _8"> </span>of <span class="_ _1"> </span>this </div><div class="t m0 x1 hc y26 ff1 fs1 fc0 sc0 ls0 ws0">project <span class="_ _a"> </span>is <span class="_ _a"> </span>to <span class="_ _a"> </span>solve <span class="_ _a"> </span>the<span class="_ _2"></span><span class="lse">se</span> <span class="_ _a"> </span>problems <span class="_ _a"> </span>by <span class="_ _a"> </span>designing </div><div class="t m0 x1 hc y27 ff1 fs1 fc0 sc0 ls0 ws0">a <span class="_ _b"> </span>system <span class="_ _b"> </span>to <span class="_ _b"> </span>cont<span class="_ _0"></span>rol <span class="_ _b"> </span>the <span class="_ _b"> </span>parking <span class="_ _b"> </span>are<span class="_ _0"></span>a <span class="_ _b"> </span>using </div><div class="t m0 x1 hc y28 ff1 fs1 fc0 sc0 lsa ws0">a <span class="_ _c"> </span><span class="ls0">microcontrol<span class="_ _0"></span>ler. <span class="_ _c"> </span>The <span class="_ _c"> </span>m<span class="_ _0"></span>icr<span class="_ _2"></span>ocont<span class="_ _0"></span>roller <span class="_ _c"> </span>serves <span class="_ _c"> </span><span class="lsd">as</span> </span></div><div class="t m0 x1 hc y29 ff1 fs1 fc0 sc0 lsa ws0">a <span class="_ _8"> </span><span class="ls0">programm<span class="_ _0"></span>in<span class="_ _2"></span>g<span class="_ _0"></span> <span class="_ _9"> </span>tool <span class="_ _8"> </span>to <span class="_ _8"> </span>r<span class="_ _2"></span>u<span class="_ _0"></span>n <span class="_ _8"> </span>t<span class="_ _2"></span>he <span class="_ _1"> </span>whole <span class="_ _8"> </span>operation, <span class="_ _8"> </span>to </span></div><div class="t m0 x1 hc y2a ff1 fs1 fc0 sc0 ls0 ws0">reduce <span class="_ _2"></span> <span class="_ _2"></span>the <span class="_ _2"></span> <span class="_ _2"></span>cos<span class="_ _0"></span>t <span class="_ _2"></span> <span class="_ _2"></span>in <span class="_ _2"></span> <span class="_ _2"></span>terms <span class="_ _2"></span> <span class="_ _2"></span>of <span class="_ _2"></span>requirement <span class="_ _2"></span> <span class="_ _2"></span>such <span class="_ _2"></span> <span class="_ _2"></span>as <span class="_ _0"></span> </div><div class="t m0 x1 hc y2b ff1 fs1 fc0 sc0 ls0 ws0">job <span class="_ _3"></span>opportunity <span class="_ _3"></span> <span class="_ _6"></span>and <span class="_ _3"></span>to <span class="_ _6"></span>increase <span class="_ _6"></span>security. <span class="_ _3"></span>Moreover, </div><div class="t m0 x1 hc y2c ff1 fs1 fc0 sc0 ls0 ws0">this <span class="_ _8"> </span>system <span class="_ _8"> </span>is <span class="_ _9"> </span>faster, <span class="_ _8"> </span>fl<span class="_ _2"></span>e<span class="_ _0"></span>xible <span class="_ _8"> </span>and <span class="_ _9"> </span>can <span class="_ _9"> </span>meet <span class="_ _8"> </span>market </div><div class="t m0 x1 hb y2d ff1 fs1 fc0 sc0 ls0 ws0">needs<span class="fs8">. </span></div><div class="t m0 x1 ha y2e ff3 fs6 fc0 sc0 ls0 ws0">1. Concept and Ope<span class="_ _0"></span>ration </div><div class="t m0 x1 hd y2f ff4 fs1 fc0 sc0 ls0 ws0">In <span class="_ _2"></span>t<span class="_ _2"></span>he <span class="_ _2"></span>proj<span class="_ _2"></span>e<span class="_ _0"></span>ct <span class="_ _3"></span>&#8220;Car <span class="_ _3"></span>Parkin<span class="_ _0"></span>g <span class="_ _3"></span>System&#8221; <span class="_ _3"></span>w<span class="_ _0"></span>e <span class="_ _3"></span>have <span class="_ _3"></span>shown </div><div class="t m0 x1 hc y30 ff1 fs1 fc0 sc0 lsf ws0">th<span class="ls0">e concept of an automatic car parking system. As in </span></div><div class="t m0 x1 hc y31 ff1 fs1 fc0 sc0 ls0 ws0">the <span class="_ _3"></span>modern <span class="_ _3"></span>world<span class="_ _0"></span> <span class="_ _3"></span>everything <span class="_ _3"></span>is <span class="_ _3"></span>going <span class="_ _3"></span>automatic, <span class="_ _3"></span>we </div><div class="t m0 x1 hc y32 ff1 fs1 fc0 sc0 ls0 ws0">have <span class="_ _8"> </span>built <span class="_ _1"> </span>a <span class="_ _8"> </span>system <span class="_ _8"> </span>which <span class="_ _1"> </span>will <span class="_ _8"> </span>automatically <span class="_ _1"> </span>sense </div><div class="t m0 x1 hc y33 ff1 fs1 fc0 sc0 ls0 ws0">the <span class="_ _6"></span>entry <span class="_ _6"></span>and <span class="_ _6"></span>exit <span class="_ _6"></span>of <span class="_ _6"></span>cars <span class="_ _6"></span>through <span class="_ _6"></span>the <span class="_ _6"></span>gate <span class="_ _6"></span>and <span class="_ _6"></span>then </div><div class="t m0 x1 hc y34 ff1 fs1 fc0 sc0 ls0 ws0">display <span class="_ _6"></span>the <span class="_ _1"></span>number <span class="_ _6"></span>of <span class="_ _1"> </span>cars <span class="_ _1"></span>in <span class="_ _1"></span>the <span class="_ _6"></span>parking <span class="_ _6"></span>lot<span class="_ _2"></span>. <span class="_ _6"></span>Even </div><div class="t m0 x1 hc y35 ff1 fs1 fc0 sc0 ls0 ws0">we can set a m<span class="_ _0"></span>aximum capacity of cars by the he<span class="_ _0"></span>lp of </div><div class="t m0 x11 hc y36 ff1 fs1 fc0 sc0 ls0 ws0"> </div><div class="t m0 x11 hc y37 ff1 fs1 fc0 sc0 ls0 ws0">user <span class="_ _1"></span>interface <span class="_ _1"></span>given <span class="_ _1"></span>in <span class="_ _1"></span>the <span class="_ _1"></span>hardware <span class="_ _1"></span>in <span class="_ _1"></span>the <span class="_ _1"> </span>form <span class="_ _1"></span>of </div><div class="t m0 x11 hc y38 ff1 fs1 fc0 sc0 ls0 ws0">switches <span class="_"> </span>so <span class="_ _4"> </span>that <span class="_"> </span>t<span class="_ _2"></span>h<span class="_ _0"></span>ere <span class="_ _4"> </span>is <span class="_"> </span>no <span class="_ _4"> </span>congestion. <span class="_"> </span>We <span class="_ _4"> </span>have </div><div class="t m0 x11 hc y39 ff1 fs1 fc0 sc0 ls0 ws0">deployed <span class="_ _d"> </span>a <span class="_ _d"> </span>microcontroller <span class="_ _d"> </span>used <span class="_ _d"> </span>to <span class="_ _d"> </span>sense <span class="_ _d"> </span>the </div><div class="t m0 x11 hc y3a ff1 fs1 fc0 sc0 ls0 ws0">movement <span class="_ _5"> </span>of <span class="_ _7"> </span>cars <span class="_ _7"> </span>and <span class="_ _7"> </span>check <span class="_ _5"> </span>whether <span class="_ _7"> </span>there <span class="_ _7"> </span>is <span class="_ _5"> </span>a </div><div class="t m0 x11 hc y3b ff1 fs1 fc0 sc0 ls0 ws0">capacity <span class="_ _3"></span>for <span class="_ _3"></span>cars <span class="_ _3"></span>to <span class="_ _6"></span>park, <span class="_ _3"></span>then <span class="_ _3"></span>decide <span class="_ _3"></span>t<span class="_ _2"></span>h<span class="_ _0"></span>e <span class="_ _3"></span>gate <span class="_ _3"></span>ei<span class="_ _2"></span>th<span class="_ _0"></span>er </div><div class="t m0 x11 hc y3c ff1 fs1 fc0 sc0 ls0 ws0">opens <span class="_ _3"></span>or <span class="_ _3"></span>not. <span class="_ _3"></span>I<span class="_ _0"></span>t <span class="_ _3"></span>is <span class="_ _3"></span>also <span class="_ _3"></span>possib<span class="_ _0"></span>le <span class="_ _3"></span>to <span class="_ _3"></span>open <span class="_ _3"></span>a <span class="_ _3"></span>gate <span class="_ _3"></span>wh<span class="_ _0"></span>en </div><div class="t m0 x11 hc y3d ff1 fs1 fc0 sc0 ls0 ws0">any <span class="_ _8"> </span>car <span class="_ _8"> </span>enters <span class="_ _8"> </span>i<span class="_ _2"></span>n <span class="_ _1"> </span>the <span class="_ _9"> </span>parking <span class="_ _1"> </span>l<span class="_ _2"></span>ot <span class="_ _8"> </span>or <span class="_ _8"> </span>close <span class="_ _8"> </span>the <span class="_ _8"> </span>door </div><div class="t m0 x11 hc y3e ff1 fs1 fc0 sc0 ls0 ws0">when a car exits from<span class="_ _0"></span> <span class="lsf">it</span>. </div><div class="t m0 x11 hc y3f ff1 fs1 fc0 sc0 ls0 ws0">There <span class="_ _2"></span>ar<span class="_ _2"></span>e<span class="_ _0"></span> <span class="_ _3"></span>two <span class="_ _2"></span>sets <span class="_ _3"></span>of <span class="_ _2"></span>sensors: <span class="_ _2"></span>one<span class="_ _2"></span> <span class="_ _2"></span>is <span class="_ _3"></span>installed <span class="_ _2"></span>on <span class="_ _3"></span>the </div><div class="t m0 x11 hc y40 ff1 fs1 fc0 sc0 ls0 ws0">first <span class="_ _9"> </span>gate <span class="_ _8"> </span>(entry <span class="_ _8"> </span>gat<span class="_ _2"></span>e) <span class="_ _8"> </span>and <span class="_ _8"> </span>t<span class="_ _2"></span>he <span class="_ _8"> </span>other <span class="_ _9"> </span>is <span class="_ _8"> </span>installed <span class="_ _9"> </span>on </div><div class="t m0 x11 hc y41 ff1 fs1 fc0 sc0 lsa ws0">an<span class="ls0">other gate (ex<span class="_ _0"></span>it<span class="_ _2"></span> g<span class="_ _0"></span>ate). when a car arrives at the doo<span class="_ _0"></span>r<span class="_ _2"></span>,<span class="_ _0"></span> </span></div><div class="t m0 x11 hc y42 ff1 fs1 fc0 sc0 ls0 ws0">the <span class="_ _2"></span>microcon<span class="_ _0"></span>troller <span class="_ _2"></span>receives t<span class="_ _2"></span>h<span class="_ _0"></span>e <span class="_ _2"></span>signal <span class="_ _2"></span>from<span class="_ _0"></span> <span class="_ _2"></span>the <span class="_ _2"></span>entry </div><div class="t m0 x11 hc y43 ff1 fs1 fc0 sc0 ls0 ws0">sensors <span class="_ _3"></span>and <span class="_ _2"></span>t<span class="_ _2"></span>h<span class="_ _0"></span>en <span class="_ _3"></span>checks <span class="_ _3"></span>whether <span class="_ _2"></span>there <span class="_ _3"></span>is <span class="_ _3"></span>a <span class="_ _3"></span>space <span class="_ _3"></span>for </div><div class="t m0 x11 hc y44 ff1 fs1 fc0 sc0 ls0 ws0">the <span class="_ _3"></span>ca<span class="_ _0"></span>r <span class="_ _3"></span>to <span class="_ _2"></span>be <span class="_ _2"></span>accommodated. <span class="_ _2"></span> <span class="_ _2"></span>Simultaneously, <span class="_ _3"></span>it <span class="_ _2"></span>will </div><div class="t m0 x11 hc y45 ff1 fs1 fc0 sc0 ls0 ws0">display <span class="_ _2"></span>the <span class="_ _3"></span>number <span class="_ _3"></span>of <span class="_ _2"></span>cars <span class="_ _3"></span>present <span class="_ _2"></span>in <span class="_ _3"></span>the <span class="_ _2"></span>par<span class="_ _2"></span>k<span class="_ _0"></span>ing <span class="_ _3"></span>lot </div><div class="t m0 x11 hc y46 ff1 fs1 fc0 sc0 ls0 ws0">on <span class="_ _9"> </span>a <span class="_ _9"> </span>LCD <span class="_ _9"> </span>screen <span class="_"> </span>and <span class="_ _8"> </span>opens <span class="_"> </span>the <span class="_ _8"> </span>gate<span class="_ _2"></span> <span class="_ _8"> </span>if <span class="_"> </span>there <span class="_ _8"> </span>is <span class="_"> </span>a<span class="_ _0"></span> </div><div class="t m0 x11 hc y47 ff1 fs1 fc0 sc0 ls0 ws0">space for the <span class="_ _2"></span>ca<span class="_ _0"></span>r <span class="_ _2"></span>to park. when a <span class="_ _2"></span>car mov<span class="_ _0"></span>es <span class="_ _2"></span>out of the </div><div class="t m0 x11 hc y48 ff1 fs1 fc0 sc0 ls0 ws0">parking <span class="_ _8"> </span>area, <span class="_ _8"> </span>the <span class="_ _9"> </span>microcontro<span class="_ _0"></span>ller <span class="_ _8"> </span>reduces <span class="_ _8"> </span>the <span class="_ _8"> </span>count </div><div class="t m0 x11 hc y49 ff1 fs1 fc0 sc0 ls0 ws0">displayed <span class="_ _8"> </span>on <span class="_ _9"> </span>the <span class="_ _9"> </span>LCD <span class="_ _8"> </span>accordingly <span class="_ _8"> </span>and <span class="_"> </span>then <span class="_ _8"> </span>closes<span class="_ _0"></span> </div><div class="t m0 x11 hc y4a ff1 fs1 fc0 sc0 ls0 ws0">the gate. </div><div class="t m0 x11 hc y4b ff1 fs1 fc0 sc0 ls0 ws0">The <span class="_ _2"></span>sensing <span class="_ _2"></span>of <span class="_ _2"></span>entry <span class="_ _2"></span>and <span class="_ _2"></span>exit <span class="_ _2"></span>of <span class="_ _2"></span>cars <span class="_ _2"></span>is <span class="_ _2"></span>done <span class="_ _2"></span>through </div><div class="t m0 x11 hc y4c ff1 fs1 fc0 sc0 ls0 ws0">infrared <span class="_ _8"> </span>transm<span class="_ _0"></span>itters <span class="_ _8"> </span>and <span class="_ _8"> </span>receivers. <span class="_ _8"> </span>Before <span class="_ _1"> </span>the <span class="_ _8"> </span>door </div><div class="t m0 x11 hc y4d ff1 fs1 fc0 sc0 ls0 ws0">the <span class="_ _1"></span>infrared <span class="_ _6"></span>transmitter <span class="_ _1"></span>is <span class="_ _6"></span>mounted <span class="_ _1"></span>on <span class="_ _1"></span>one <span class="_ _1"></span>side <span class="_ _6"></span>and </div><div class="t m0 x11 hc y4e ff1 fs1 fc0 sc0 ls0 ws0">the <span class="_ _3"></span>receiver <span class="_ _3"></span>is <span class="_ _3"></span>placed <span class="_ _3"></span>direc<span class="_ _0"></span>tly <span class="_ _6"></span>against <span class="_ _3"></span>the <span class="_ _3"></span>transmitter </div><div class="t m0 x11 hc y4f ff1 fs1 fc0 sc0 ls0 ws0">across <span class="_"> </span>the <span class="_"> </span>door. <span class="_"> </span>when <span class="_"> </span>a <span class="_"> </span>car <span class="_"> </span>a<span class="_ _2"></span>rriv<span class="_ _0"></span>es, <span class="_ _4"> </span> <span class="_"> </span>the <span class="_"> </span>infrared<span class="_ _0"></span> </div><div class="t m0 x11 hc y50 ff1 fs1 fc0 sc0 ls0 ws0">beam is <span class="_ _2"></span>blocked <span class="_ _2"></span>by the <span class="_ _2"></span>car <span class="_ _2"></span>and the <span class="_ _2"></span>receiver is <span class="_ _2"></span>devoid </div><div class="t m0 x11 hc y51 ff1 fs1 fc0 sc0 ls0 ws0">of <span class="_ _3"></span>i<span class="_ _2"></span>n<span class="_ _0"></span>frared <span class="_ _6"></span>rays <span class="_ _3"></span>and <span class="_ _3"></span>i<span class="_ _2"></span>t<span class="_ _0"></span>s <span class="_ _6"></span>output <span class="_ _6"></span>changes. <span class="_ _3"></span>This <span class="_ _3"></span>change </div><div class="t m0 x11 hc y52 ff1 fs1 fc0 sc0 ls0 ws0">message <span class="_ _e"> </span>is <span class="_ _f"> </span>sent <span class="_ _e"> </span>to <span class="_ _f"> </span>the <span class="_ _e"> </span>microcontroller <span class="_ _e"> </span>and </div><div class="t m0 x11 hc y53 ff1 fs1 fc0 sc0 ls0 ws0">accordingly it increases<span class="ls10"> </span>the count and <span class="_ _2"></span>open<span class="_ _0"></span>s <span class="_ _2"></span>th<span class="_ _0"></span>e <span class="_ _2"></span>doo<span class="_ _0"></span>r </div><div class="t m0 x11 hc y54 ff1 fs1 fc0 sc0 ls0 ws0">if there is some em<span class="_ _0"></span>pty positi<span class="_ _2"></span>on. <span class="_ _0"></span>The procedure for the </div><div class="t m0 x11 hc y55 ff1 fs1 fc0 sc0 ls0 ws0">exit of cars is m<span class="_ _0"></span>uch similar <span class="lsf">to</span> <span class="lsf">th</span>at <span class="_ _0"></span>of entry. </div><div class="t m0 xc hc y56 ff1 fs1 fc0 sc0 ls0 ws0">The <span class="_ _4"> </span>fl<span class="_ _2"></span>ow<span class="_ _0"></span> <span class="_ _5"> </span>diagram <span class="_ _4"> </span>of <span class="_ _4"> </span>t<span class="_ _2"></span>h<span class="lsf">is</span> <span class="_ _4"> </span>project <span class="_ _4"> </span>is <span class="_ _5"> </span>given <span class="_ _4"> </span>i<span class="_ _2"></span>n<span class="_ _0"></span> </div><div class="t m0 x11 hc y57 ff1 fs1 fc0 sc0 ls0 ws0">Figure <span class="_ _8"> </span>(1). <span class="_ _8"> </span>At <span class="_ _1"> </span>the <span class="_ _8"> </span>beginning <span class="_ _1"> </span>of <span class="_ _8"> </span>t<span class="_ _2"></span>he <span class="_ _1"> </span>program, <span class="_ _8"> </span>event </div><div class="t m0 x11 hc y58 ff1 fs1 fc0 sc0 ls0 ws0">counter <span class="_ _a"> </span>variable <span class="_ _a"> </span>Cnt <span class="_ _a"> </span>is <span class="_ _a"> </span>cleared <span class="_ _a"> </span>to <span class="_ _a"> </span>zero <span class="_ _a"> </span>and <span class="_ _a"> </span>the </div><div class="t m0 x11 hc y59 ff1 fs1 fc0 sc0 ls0 ws0">program <span class="_ _1"></span>checks <span class="_ _1"> </span>the <span class="_ _8"> </span>value <span class="_ _8"> </span>of <span class="_ _1"> </span>Cnt. <span class="_ _8"> </span>If <span class="_ _1"> </span>Cn<span class="_ _2"></span>t<span class="ff4">&#8805;</span>100, <span class="_ _1"> </span>then </div><div class="t m0 x12 he y5a ff5 fs9 fc0 sc0 ls0 ws0">256</div><div class="t m1 x13 hf y5b ff6 fsa fc0 sc0 ls0 ws0">International Journal of Engineering Research &amp; Technology (IJERT)</div><div class="t m1 x14 hf y5c ff7 fsa fc0 sc0 ls0 ws0">Vol. 3 Issue 1, January - 2014</div><div class="t m2 x15 h10 y5d ff8 fsb fc1 sc0 ls0 ws0"><span class="fc3 sc0">IJERT</span></div><div class="t m2 x16 h10 y5e ff9 fsb fc1 sc0 ls0 ws0"><span class="fc3 sc0">IJERT</span></div><div class="t m1 x17 hf y5f ffa fsa fc0 sc0 ls0 ws0">ISSN: 2278-0181</div><div class="t m1 x16 h11 y60 ffb fsa fc2 sc0 ls0 ws0">www.ijert.org<span class="_ _10"></span><span class="ffc fsc fc0">IJERTV3IS10140</span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div> </body> </html>
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