【正文】 ning and azimuth instructions, some products also has the boot selfchecking appeared on the market at present with voice alarm function of products are the main problem is big, alarm measuring blind area lags behind, without considering the automobile braking inertial factors and make drivers brake lag, the antiinterference ability is not strong, misstatement or automotive anticollision radar is able to realize impactproof alarm functions, basically have ultrasonic this intangible ruler, it recently obstacles distance measurement, and told to the ultrasonic rangefinding principle simple: it emit ultrasonic echo, and receive reflected by microcontroller counter obtain both lag using formula S = t, Ct / 2 calculating distances, including S for cars and obstacles, C for the distance between the sound wave propagation in the medium paper introduces the ultrasonic ranging system only have 2 ultrasonic transducer(known as probe)respectively, decorate in cars left and right after after 2 of detecting forward and reverse direction obstacle distance, the rearview mirror builtin display element display distance and direction, issued must be sound, plays the role of hints and USES a STC89C52 SCM two way ultrasonic signal cyclicly refers to the 20HHZ wave frequency is order to use the ultrasonic detection means, must generate as ultrasonic wave and receiving the functions of the device is called the中原工學院畢業(yè)設計（論文）譯文ultrasonic sensor, habit, ultrasonic transducer or ultrasonic sensors have both transmitters and receivers, but a ultrasonic sensors can also has the sending and receiving the sound waves of the dual sensors is using the principle of piezoelectric effect and ultrasonic energy conversion, be in namely emit ultrasonic, energy conversion, launch ultrasonic, And in the stockades, received echo ultrasonic vibration into electrical ranging principle generally USES the time method for the measured ultrasonic from the launch to meet obstacles returns experience of time, again multiply ultrasonic speed of get twice the distance between the sound source and distance a variety of ways, short can use ruler, longrange laser displacement etc, are suitable for high accuracy of ultrasonic ranging in long distance of ultrasound in standard air of propagation speed meters per second, by singlechip microputer is responsible for timing, SCM use M crystals, so the system of measurement precision theory can achieve mm of ultrasonic directivity strong, energy consumption is slow, in a medium transmission distance, thus ultrasonic can be used for distance ultrasonic detection distance, the design is more convenient, puting procese also relatively simple, and the measurement precision can also meet the generator can be divided into two kinds: one kind is to use electrical means producing ultrasonic, one kind is with mechanical approach to producing design belongs to nearly distance measurement, can use monly used the piezoelectric ultrasonic transducer to achieve trigger ultrasonic ranging work, can according to measuring launch reflection wave wave and the time interval between the measured distance, so as to achieve the mainly have three ranging methods:(1)phase assay, phase assays high precision, but detection though limited range，(2)sound amplitude assay, acoustic amplitude assay vulnerable reflection wave influence。定時中斷服務子程序完成三方向超聲波的輪流發(fā)射，外部中斷服務子程序主要完成時間值的讀取、距離計算、結(jié)果的輸出等工作。通過脈沖的周期設置下一個脈沖。關(guān)外部中斷0 讀取時間值MOV R7,TH0。IC2是帶有鎖定環(huán)的音頻譯碼集成塊LM567，內(nèi)部壓控振蕩器的中心頻率f0=1/，電容C4決定其帶寬。強度較強的脈沖會比強度較弱的脈沖超過界限的時間早點，因此我們會認為強度較強的脈沖屬于較近的物體。超聲波發(fā)生器內(nèi)部結(jié)構(gòu)，它有兩個壓電晶片和一個共振板。超聲波發(fā)生器可以分為兩類：一類是用電氣方式產(chǎn)生超聲波，一類是用機械方式產(chǎn)生超聲波。超聲波傳感器有發(fā)送器和接收器，但一個超聲波傳感器也可具有發(fā)送和接收聲波的雙重作用。汽車防撞雷達之所以能實現(xiàn)防撞報警功能，主要有超聲波這把無形尺子, 它測量最近障礙物的距離, 并告訴給車主。因此，大力研究開發(fā)如汽車防撞裝置等主動式汽車輔助安全裝置，減少駕駛員的負擔和判斷錯誤，對于提高交通安全將起到重要的作用。目前汽車安全領(lǐng)域被動安全研究較多，主要從安全氣囊、ABS(防抱死系統(tǒng))和懸架等方面著手，以保證駕乘人員的安全。隨著經(jīng)濟的發(fā)展與汽車科學技術(shù)的進步，公路交通呈現(xiàn)出行駛高速化、車流密集化和駕駛員非職業(yè)化的趨勢。邏輯交通控制滿足所有的交通燈控制的需求，并能回答的能力問題。評價過程的主要目的是顯示發(fā)展的本體和其相關(guān)的軟件環(huán)境的用處。當天的參數(shù)是在日歷基礎上基于假期和正常的一天與周期時間量的關(guān)系預定義的。在此類別中的所有規(guī)則如表1所示。第4節(jié)介紹交通燈控制的模糊本體的建設。這些領(lǐng)域之一是智能交通系統(tǒng)。關(guān)鍵詞:模糊本體,智能代理,智能交通系統(tǒng)(ITS),交通信號燈控制(TLC),孤立的十字路口,圖像處理,人工神經(jīng)網(wǎng)絡作為城市交通增加的結(jié)果,道路網(wǎng)絡的能力有限和發(fā)展交通工具和方法的技術(shù)方面，許多實體，關(guān)系，情況和規(guī)則已經(jīng)進入交通燈控制域和轉(zhuǎn)化成為一個知識領(lǐng)域。The motro vehicle breaking rules and regulations to the crossing is able to take a photo immediately,abstracts and the vehicle shop world range ,one uses the microelectronics technology,the puter and the technology municating by letter are a guide’s,centering on IT and IT industry information revolution is in the ,how,puter art applies more effective union and there is an effect’s brought it’s effect into play with reality is the most popular topic of scientific munity,is also that puter applications is hit by the unparalleled active field main body of a book is applied up mainly from slicing machine’s only realizing intellectualized administration of crossroads traffic light,use operation in controlling the vehicular traffic research has the goal to optimize transportation flow of people and the number of road users constantly increases, and resources provided by current infrastructures are limited, intelligent control of traffic will bee a very important issue in , some limitations to the usage of intelligent tra?c control jams for example is thought to be beneficial to both environment and economy, butimproved trafficflow may also lead to an increase in demand [Levinson, 2003].There are several models for traffic our research we focus on microscopicmodels that model the behavior of individual vehicles, and thereby can simulate dynamics of groups of has shown that such models yield realistic behavior[Nagel and Schreckenberg, 1992, Wahle and Schreckenberg, 2001].Cars in urban traffic can experience long travel times due to inefficient traffic light control of traffic lights using sophisticated sensors and intelligent optimizationalgorithms might therefore bevery of traffic light switching increasesroad capacity and traffic flow, and can prevent tra?c light contro