道路撞擊檢測(cè)系統(tǒng)中英文資料外文翻譯文獻(xiàn)-展示頁(yè)
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【正文】 表速度信號(hào){stringgps[igps]=SBUF。}}} // the first mand is over when receive the second $, Variable given the initial value當(dāng)接受到賦予初值的第二個(gè)$時(shí)第一條命令結(jié)束if (num==2){stringgps[igps]=39。 // The end of the data presented at the end of the string字符串結(jié)束標(biāo)志位numbera=0。 Record=0。 //當(dāng)變量為零時(shí)重新接受速度數(shù)據(jù)3單片機(jī)控制的實(shí)時(shí)行掃描照相機(jī)單片機(jī)控制的實(shí)時(shí)行掃描照相機(jī)使用單片機(jī)89C51[3]微控制機(jī)。它使用該單片機(jī)的T1計(jì)時(shí)器來(lái)計(jì)時(shí)。它需要計(jì)算間隔時(shí)間，該時(shí)間是2毫米的觸發(fā)器根據(jù)車輛的速度值所得到的。該系統(tǒng)使用方式1計(jì)時(shí)。該檢測(cè)系統(tǒng)能過(guò)滿足照相機(jī)工作頻率的要求[5]。該系統(tǒng)選擇計(jì)時(shí)器1的模式1工作。機(jī)器周期為1μs，預(yù)設(shè)時(shí)間周期為12μs，接著12μs =(2Y)*1μs，然后計(jì)算初始計(jì)時(shí)值Y作為65，524，將這一值放進(jìn)16位計(jì)時(shí)器，接受啟動(dòng)T1計(jì)時(shí)器。根據(jù)不同的速度值和公式：x=3000/v，計(jì)算周期時(shí)間和為了控制照相機(jī)的工作頻率獲得P20高低水平控制。int x。 //計(jì)算周期時(shí)間led_on()。led_off()。}while(1)。 (0x0f)|0x10。 //開始計(jì)時(shí)While (lms){TH1=65524/256。While (!TF1)TF1=1。led_off(){P2_0=1。}3 圖像分析和對(duì)比系統(tǒng)使用GPS為了定位起始位置并且將道路公里數(shù)結(jié)合于標(biāo)記精確的道路撞擊地點(diǎn)[6]。該系統(tǒng)使用GPS為了獲得車輛的速度值，并且通過(guò)串行通訊傳輸該速度值至單片機(jī)控制系統(tǒng)以實(shí)現(xiàn)每?jī)珊撩着臄z一幀照片的照相機(jī)控制。如果該系統(tǒng)并未采用實(shí)時(shí)控制照相機(jī)的工作頻率，那么線性掃描式照相機(jī)接受到的大部分照片是不清晰的。采用恒定的頻率采集方式將達(dá)不到如此清晰的動(dòng)態(tài)照片。與此同時(shí)下面的圖片提供了可靠的根據(jù)。圖31 實(shí)時(shí)控制照相機(jī)采集的照片圖32 非實(shí)時(shí)照相機(jī)采集的照片4 結(jié)論該系統(tǒng)設(shè)計(jì)實(shí)現(xiàn)了以下功能：（1） 該系統(tǒng)通過(guò)硬件和軟件的設(shè)計(jì)實(shí)現(xiàn)了速度值的測(cè)量，并且設(shè)計(jì)了控制GPS和單片機(jī)串行通訊的程序[9]。（3） 該系統(tǒng)使道路撞擊檢測(cè)精確度要求達(dá)到了2毫秒級(jí)別的精度，并且能夠獲得十分清晰的動(dòng)態(tài)圖片以至在公路檢測(cè)方面達(dá)到很好的效果。LineScan Camera Control Pavement DetectionSystem ResearchZhaoyun Sun1, Aimin Sha2, Li Zhao3, and Changrong Xie1 College of information engineering, Chang’an University, Xi’an 710064, Chinazhaoyunsun2 College of road, Chang’an University, Xi’an 710064, China3 College of information engineering, Chang’an University, Xi’an 710064, ChinaAbstract. The paper designs the pavement detecting system, which is based on GPS and the serial port munication technology of the SCM (singlechipmicroputer) used to control the linescan camera. The paper focuses on GPS and the serial port munication as well as the control programs of singlechip microputer .By paring and analyzing large amounts of experiments’ data and the serial images which are obtained in the highspeed vehicle moving by using this system, it shows that this system design satisfies the requirement of external trigger control in realtime linescan camera for the pavement detection system. The result shows that the images obtained in high speed are much clearer.Keywords: GPS。 serial munication。s road detecting technology and the developed countries’. In the pavement crack detection system, the linescan camera first captures highspeed realtime images about the road, then sends it to the main image processor puter, at last processes it with image analysis software, get the crack’s place, length and area so as to give reference to the road maintenance. Detection system is posed of the vehicle, linescan camera, GPS, puter, image processing software, SCM control system. Detecting the asphalt pavement by use of the system can find the crack which is more than two millimeters, including its width, length and locations. By using the speed of GPS [1] and SCM control algorithms, it realizes the real time control for linescan camera according to every two millimeters to give a LineScan Camera Control Paveme
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