【正文】 f singlechip termination circuit port INT0 interrupt the highest priority, right or left location of the output circuit with output gete IC3A access INT1 port singlechip, while singlechip and received input IC3A, interrupted by the process to identify the source code is as follows: receivel:push pswpush ace中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文cir ex1: related external interrupt 1jnb , right。output 40 kHz square wavenop。中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文參考文獻(xiàn)，.，KhuriYakub， Kino，.，“High Frequency Acoustic Wave Measurement in Air”，in Proceedings of IEEE 1983 Ultrasonic Symposium，October 312 November，1983，Atlanta，GA， Abreu，.，Ceres, Freire,T.,“Ultrasonic Ranging: Envelope Analysis Gives Improved Accuracy”,Sensor Review, ,1992,， M., Anaya, and Fritsch C.,‖Digital Signal Processing Techniques for High Accuracy Ultrasonic Range Measurement:,IEEE Transactions: Instrumentation and , August 1991, C., Cicco, ., Mortem, B., Prudenziati, M., and Taron, A., ―A Temperature Compensated Ultrasonic Sensor Operating in Air for Distance and Proxinmity Measurement‖, IEEE Trasaction on Industry Electronics, Vol, IE29 ,1982, , ., Ceres, R., Calderon, L and Freire, T., ‖Ultrasonic Ranging Gets Themal Correction‖, Sensor Review, Vol, 9 , 1989,（論文）譯文Ultrasonic ranging system design Publication title: Sensor : ABSTRACT: Ultrasonic ranging technology has wide using worth in many field, such as the industrial locale, vehicle navigation and sonar it has been used in level measurement, selfguided autonomous vehicles, fieldwork robots automotive navigation, air and underwater target detection, identification ,location and so there is an important practicing meaning to learn the ranging theory and ways improve the precision of the ultrasonic ranging system in hand, satisfy the request of the engineering personal for the precision,the bound and the usage, a portable ultrasonic ranging system based on the single chip processor was : Ultrasound r, Ranging System, Single Chip Processor With the development of science and technology, the improvement of people’s standard of living, speeding up the development and construction of the drainage system have greatly developed their situation is constantly , due to historical reasons many unpredictable factors in the synthesis of her time, the city drainage particular drainage system often lags behind urban , there are often good building excavation has been building facilities to upgrade the drainage system brought to the city sewage, and it is clear to the city sewage and drainage culvert in the sewage treatment is very important to people’s robots designed to clear the drainage culvert and the automatic control system Free sewage culvert clear guarantee robot, the robot is designed to clear the culvert sewage to the System is the core ponent of the development of ultrasonic range , it is very important to design a good ultrasonic range subject backgroundWith the development of economy and car scientific and technological progress, highway traffic presents driving fast pace, traffic dense is changed and the driver not professional the same time, along with the rapid development of auto industry, automobile yield and quantities are increased road development，中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文transportation management is relatively backward, leading to a large number of traffic accidents in some cities, especially transportation system in the world, ITS transportation science and technology of advanced technology, ITS exerting existing infrastructure of potential, enhance the transport efficiency, safeguard traffic safety and ease traffic wager plug, improving urban environment aspects of outstanding performance, has received the governments of widespread Chinese government is also highly intelligent transportation system of the development and popularization automotive anticollision system as ITS development of a base, ITS success to the whole system has a very significant , auto safety said can be divided into two main research direction: first,it is active safety technology, including the prevention of accidents, the way is now automotive safety research ultimate purpose。中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文結(jié)論對(duì)所要求測(cè)量范圍30cm200cm內(nèi)的平面物體做了多次測(cè)量發(fā)現(xiàn)，且重復(fù)性好。第六步：通過(guò)公式計(jì)算距離y。根據(jù)第二部的數(shù)據(jù)設(shè)定時(shí)間窗。第一步：脈沖的傳送產(chǎn)生一種簡(jiǎn)單的超聲波第二步：根據(jù)公式改變回波放大器的獲得量直到回?fù)鼙粰z測(cè)到。MOV R6,TL0 CLR C MOV A,R6 SUBB A,0BBH。 引腳為0，轉(zhuǎn)至左測(cè)距中斷電路服務(wù)程序 returne：SETB EX1；開外部中斷1pop acc中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文pop pswreti right：...；右測(cè)距電路中斷服務(wù)程序入口ajmp returnleft：...；左測(cè)距電路中斷服務(wù)程序入口ajmp return 計(jì)算超聲波傳播時(shí)間在啟動(dòng)發(fā)射電路的同時(shí)啟動(dòng)單片機(jī)內(nèi)部的定時(shí)器T0，利用定時(shí)器的計(jì)數(shù)功能，記錄超聲波發(fā)射的時(shí)間和受到反射波的時(shí)間。調(diào)節(jié)R8在發(fā)射的載頻上，則LM567輸入信號(hào)大于25mv，輸出端8腳由5由高電平躍變?yōu)榈碗娖?，作為中斷?qǐng)求信號(hào)，送至單片機(jī)處理。puzel：mov 14h，12hhere： ；nop；nop；nop；djnz 14h，here；Ret，單片機(jī)執(zhí)行上面的程序后，經(jīng)過(guò)三極管T放大，驅(qū)動(dòng)超聲波發(fā)射頭UCM40T，發(fā)出40khz的脈沖超聲波，且持續(xù)發(fā)射200ms。 超聲波測(cè)距原理超聲波發(fā)射器向某一方向發(fā)射超聲波，在發(fā)射時(shí)刻的同時(shí)開始計(jì)時(shí)，超聲波在空氣中傳播，途中碰到障礙物就立即返回來(lái)，超聲波接收器收到反射波就立即停止計(jì)時(shí)。一個(gè)物體的脈沖強(qiáng)度很大程度上取決于這個(gè)物體的自然屬性尺寸還有它與傳感器的距離。當(dāng)它的兩極外加脈沖信號(hào)，其頻率等于壓電晶片的固有振蕩頻率時(shí)，壓電晶片將會(huì)發(fā)生共振，并帶動(dòng)共振板振動(dòng)，便產(chǎn)生超聲波。本設(shè)計(jì)的超聲波測(cè)距就是使用了渡越時(shí)間檢測(cè)法。本設(shè)計(jì)屬于近距離測(cè)量，可以采用常用的壓電式超聲波換能器來(lái)實(shí)現(xiàn)觸發(fā)單元。由單片機(jī)負(fù)責(zé)計(jì)時(shí)，所以此系統(tǒng)的測(cè)量精度理論上可以達(dá)到毫米級(jí)。超聲波傳感器是利用壓電效應(yīng)的原理將電能和超聲波相互轉(zhuǎn)化，即在發(fā)射超聲波的時(shí)候，將電能轉(zhuǎn)換，發(fā)射超聲波；而在收到回波的時(shí)候，則將超聲振動(dòng)轉(zhuǎn)換成電信號(hào)。超聲波是指頻率高于20HHZ的機(jī)械波。其實(shí)超聲測(cè)距原理簡(jiǎn)單: 它發(fā)射超聲波并接收反射回波, 通過(guò)單片機(jī)計(jì)數(shù)器獲得兩者時(shí)間差t, 利用公式S=Ct/2計(jì)算距離, 其中S為汽車與障礙物之間的距離, C為聲波在介質(zhì)中的傳播速度?！?，并有距離顯示、聲響報(bào)警、區(qū)域警示和方位指示，有些產(chǎn)品還具備開機(jī)自檢功能。顯然，此類產(chǎn)品的研究開發(fā)具有極大的實(shí)現(xiàn)意義和廣闊的應(yīng)用前景。 課題設(shè)計(jì)的意義隨著現(xiàn)代社會(huì)工業(yè)化程的發(fā)展，汽車這一交通工具正為越來(lái)越多的人所用，但是隨之而來(lái)的問(wèn)題也顯而易見，那就是隨著車輛的增多，交通事故的頻繁發(fā)生，由此導(dǎo)致的人員傷亡和財(cái)產(chǎn)損失數(shù)目驚人。從經(jīng)濟(jì)性和安全性兩方面來(lái)說(shuō)，中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文這些被動(dòng)安全措施是在事故發(fā)生時(shí)刻對(duì)車輛和人員進(jìn)行保護(hù)，有很大的局限性，因而車輛的主動(dòng)安全研究尤為重要，引出了本文研究的基于單片機(jī)的超聲波測(cè)距系統(tǒng)。汽車防撞系統(tǒng)作為ITS 發(fā)展的一個(gè)基礎(chǔ)，它的成功與否對(duì)整個(gè)系統(tǒng)有著很大的作用。同時(shí)，隨著汽車工業(yè)的飛速發(fā)展，汽車的產(chǎn)量和保有量都在急劇增加。城市污水給人們帶來(lái)的困擾，因此箱的排污疏通對(duì)大城市給排水系統(tǒng)污水理，人們生活舒適顯得非常重要?？?jī)效評(píng)估機(jī)制，可以支持這種說(shuō)法。我們?cè)u(píng)估邏輯交通控制是基于理論知識(shí)的。雖然所有的信息，尤其是交通燈控制規(guī)則已提取國(guó)際標(biāo)準(zhǔn)和科學(xué)交通文學(xué)，專家的知識(shí)優(yōu)勢(shì)是他們最后的正確性驗(yàn)證標(biāo)準(zhǔn)。在此類別中的所有規(guī)則都列在附錄A。例如，假期期間的周期時(shí)間是較平日少。從氣象研究所取得氣象條件。本次評(píng)選有助于智能系統(tǒng)，以確定下一步的階段測(cè)序。語(yǔ)義網(wǎng)絡(luò)被定義為當(dāng)前Wed的延伸，這些網(wǎng)站的信息都給出明確的含義。第五節(jié)從路口提取的圖像信息解釋。這些圖像處理利用圖像處理算法和神經(jīng)網(wǎng)絡(luò)的方法，然后發(fā)送到一個(gè)智能代理。一些努力已制成這個(gè)通過(guò)展示和使用本體檢測(cè)交通領(lǐng)域擁塞，管理非城市道路氣象事件，駕駛阿德?！骼锵到y(tǒng)，共享和整合一個(gè)智能交通系統(tǒng)。除了本體作為概念化的形式主義的重要性，它有可能超過(guò)所代表的數(shù)據(jù)。這個(gè)領(lǐng)域的建模知識(shí)幫助交通代理和應(yīng)用有效地管理關(guān)于實(shí)時(shí)條件下的交通。根據(jù)預(yù)定義的XML架構(gòu)，這種信息轉(zhuǎn)