【正文】 open external interrupt 1popacc poppsw reti right:…。定時(shí)中斷服務(wù)子程序完成三方向超聲波的輪流發(fā)射，外部中斷服務(wù)子程序主要完成時(shí)間值的讀取、距離計(jì)算、結(jié)果的輸出等工作。關(guān)外部中斷0 讀取時(shí)間值MOV R7,TH0。強(qiáng)度較強(qiáng)的脈沖會(huì)比強(qiáng)度較弱的脈沖超過界限的時(shí)間早點(diǎn)，因此我們會(huì)認(rèn)為強(qiáng)度較強(qiáng)的脈沖屬于較近的物體。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(jī)械方式產(chǎn)生超聲波。汽車防撞雷達(dá)之所以能實(shí)現(xiàn)防撞報(bào)警功能，主要有超聲波這把無形尺子, 它測(cè)量最近障礙物的距離, 并告訴給車主。目前汽車安全領(lǐng)域被動(dòng)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。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。當(dāng)天的參數(shù)是在日歷基礎(chǔ)上基于假期和正常的一天與周期時(shí)間量的關(guān)系預(yù)定義的。第4節(jié)介紹交通燈控制的模糊本體的建設(shè)。關(guān)鍵詞:模糊本體,智能代理,智能交通系統(tǒng)(ITS),交通信號(hào)燈控制(TLC),孤立的十字路口,圖像處理,人工神經(jīng)網(wǎng)絡(luò)作為城市交通增加的結(jié)果,道路網(wǎng)絡(luò)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(shí)體，關(guān)系，情況和規(guī)則已經(jīng)進(jìn)入交通燈控制域和轉(zhuǎn)化成為一個(gè)知識(shí)領(lǐng)域。我們對(duì)自己的聚類算法模型和其它使用綠燈模擬器的系統(tǒng)做了比較。本文介紹了一個(gè)智能交通的系統(tǒng)的設(shè)計(jì)。交通仿真有幾個(gè)不同的模型。本文最重要的目的之一是提出一個(gè)獨(dú)立的可重復(fù)使用的交通燈控制模塊。一些努力已制成這個(gè)通過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)。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。雖然所有的信息，尤其是交通燈控制規(guī)則已提取國際標(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)。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。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。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)。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。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。根據(jù)第二部的數(shù)據(jù)設(shè)定時(shí)間窗。output 40 kHz square wavenop。open external interrupt 0 POP ACC POP PAW RETI For a flat target, a distance measurement consists of two phases: a coarse measurement and, a fine measurement: Step 1: Transmission of one pulse train to produce a simple ultrasonic 2: Changing the gain of both echo amplifiers according to equation，until the echo is 3:detection of te amplitudes anf zerocrossing times of both 4:setting the gains of both echo amplifiers to normalize the output at, say 3 the period of the next pulses according to the: period of the time window according to the data of step 5:sending two pulse trains to produce an interfered the zerocrossing in the echo,detemine to otherwise calculate to by interpolation using the amplitudes near the t sub ml and t sub : Calculation of the distance y using （論文）譯文 ultrasonic ranging system software designSoftware is divided into two parts, the main program and interrupt service of the work of the main program is initialized, each sequence of ultrasonic transmitting and receiving service routines from time to plete three of the rotation direction of ultrasonic launch, the main external interrupt service subroutine to resd the value of pletion time, distance calculation, the results of the output and so （論文）譯文Required measuring range of 30cm~200cm objects inside the plane to do a number of measurement。(3)ferrying more time assay, crossing the time assay way of working is simple, intuitive, in hardware control and software design are very easy to principle is: from the launch emit ultrasonic detection sensor, the gas medium spread to receive sensor of time, this time is crossing the more design is the use of ultrasonic ranging the crossing the time the mobile vehicles of the application 15中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文of ultrasonic sensor is the use of ultrasound in air of directional spread and solid reflective characteristics(pwave)and by receiving their launch ultrasonic reflecting signal, according to the ultrasonic issued and echo receiving the Windows and propagation speed, calculate transmission distance, thus obtains the obstacles to vehicle （論文）譯文 principle of ultrasonic distance measurement the principle of piezoelectric ultrasonic generatorPiezoelectric ultrasonic generator is the use of piezoelectric crystal resonators to generator, the internal structure as shown, it has two piezoelectric chip and a resonance it’s two plus pulse signal, the frequency equal to the intrinsic piezoelectric oscillation frequency chip, the chip will happen piezoelectric resonance, and promote the development of plate vibration resonance, ultrasound is , if the two are not interelectrode voltage, when the board received ultrasonic resonance, it will be for vibration suppression, then it bees the ultrasonic traditional way to determine the moment of the echo’s arrival is based on thresholding the received signal with a fixed threshold is chosen well above the noise level, whereas the moment of arrival of an echo is defined as the first moment the echo signal surpasses that intensity of an echo reflecting from an object strongly depends on the object’s nature, size and distance from the , the time interval from the echo’s starting point to the moment when it surpasses the threshold changes with the different intensities arriving exactly at the same tome will surpass the threshold at different stronger one will surpass the threshold earlier than the weaker, so it will be considered as belonging to a nearer The principle of ultrasonic distance measurement Ultrasonic transmitter in a direction to launch ultrasound, in the moment to launch the beginning of time at the same time, the spread of ultrasound in the air, obstracles on his way to return immediately, the ultrasonic reflected wave wave received by the reveiver immediately stop the in the air as the propagation velocity of 340m/s, according to the timer records the time t, we can calculate the distance between the launch distance barrier(s), that is:s=340t/2中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文 Ranging System for the Second Circuit DesignSystem is characterized by singlechip microputer to control the use of ultrasonic transmitter and ultrasonic receiver since the launch from time to time, singlechip selection of 8751,economicto –use, and the chip has 4K of ROM, to facilitate schematic diagram shown in Figure 1 circuit principle diagram中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文 40 kHz ultrasonic pulse generated with the launchRanging system using the ultrasonic sensor of piezoelectric sensors UCM40, its operating voltage of the pulse signal is 40kHz, which by the singlechip implementation of the following procedures to :mov 14h, 12h。計(jì)算時(shí)間值 存儲(chǔ)結(jié)果開外部中斷0中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文第四步：設(shè)置回波放大器的所得規(guī)格輸出，假定是3v。超聲波發(fā)射持續(xù)200ms 輸出40kHz方波 超聲波的接收與處理接收頭采用與發(fā)射頭配對(duì)的UCM40R，將超聲波調(diào)制脈沖變?yōu)殡妷盒盘?hào)，經(jīng)運(yùn)算放大器ic1a和ic1b兩級(jí)放大后加至IC2,。中原工學(xué)院畢業(yè)設(shè)計(jì)（論文）譯文 超聲波測(cè)距原理 壓電式超聲波發(fā)生器原理壓電式超聲波發(fā)生器實(shí)際上是利用壓電晶體的諧振來工作的。