基于ARM和线阵CCD的高高速数据采集系统毕业论文外文翻译.docx

1、基于ARM和线阵CCD的高高速数据采集系统 毕业论文外文翻译HighSpeed Data Acquisition System Based on ARM Linear-CCDAbstract : This paper presents a high speed acquisition system of linear-CCD based on ARM, high-speed linear-CCD and high-speed ADC are selected. As the sampling speed of A/D is slower than the working clock frequ

2、ency of ARM, CPLD and FIFO are used as I/O between A/D and ARM. It makes the circuit works harmonious, simple and easy controlling, and also increases the efficiency of ARM. In order to increase the communication speed, the Universal Serial Bus (USB) technology is adopted to communicate with the PC.

3、 ARM is the key processor utilized to control the data sampling, data compute and data transfer. As a result, the whole system works effective. The system can be applied to the high speed data acquisition and operation situations from multi-channel analog signals. Key Words : ARM; Linear CCD; Contac

4、t-line; Pantograph; Stagger value I. Introduction In electrification railways, in order to extend the life of the pantograph on electric locomotives, so that the slider of pantograph wear evenly, the contact-line (electrified railway power feed line) in straight-line segments is arranged as zigzag r

5、oute (curve section arranged in the form of polyline). The distance between the contact-line of positioning point and the pantograph centerline track is called out stagger-value, which is a key indicator of contact-line .Stagger-value can not be ignored, the value too small will affect the slider of

6、 pantograph wear evenly and the purpose of extending using life; otherwise, in some cases (such as caught in a stiff winds), cause a large range of lateral movement of the roof (and the higher the speed, the greater pantograph swing around), some parts of contact-line will be in excess of the effect

7、ive work length of pantograph, so that the stagger-value of contact-line beyond the standard range, leading to deterioration of the current collection, and even cause incorrect running of the pantograph accident. Pantograph-catenary malfunction will result in interruption of train operation, which i

8、mpact on rail transport seriously. In order to avoid these phenomena, the stagger-value and its changes should be tested regularly.Therefore, a locomotive contact-line monitoring system and its mating data acquisition system were developed, which calculate the instant stagger-value quickly.II. Syste

9、m Components System hardware components are shown in figure 1. The system consists of the following components: (1) using TOSHIBA Companys high-speed linear array CCD to achieve the digitization of contact-line images (CCD output the signal of corresponding time sequence of position); (2) using Atme

10、l Companys AT91RM9200 processor of ARM9 series to realize digital signal acquisition and processing; (3) using PDIUSBD12 USB interface device to complete the data communications between measurement system and the PC. Due to the characteristics of its improved Harvard structure, special instructions

11、and quick to realize a variety of signal processing, ARM processor is widely used in image processing, communications, radar, sonar, precision machinery fields, etc. ARM processor is adopted for its arithmetic speed and bus width. As the real-time signal analysis and calculation require a high speed

12、 of computing, Atmel Companys ARM chipAT91RM9200 is selected. The chip is ARM920T based, high-performance, low power consumption 16/32-bit RISC(reduced instruction set computer) microcontroller, which incorporates a rich set of application peripherals and provide a single-chip solution for industria

13、l control applications that require a wide range of peripherals at low power consumption and strictly stable working. III. Real-time processing and transmission of CCD digital image In order to achieve real-time digital image transmission, several major factors which affect real-time transmission sh

14、ould be necessary to solve: First, the speed of linear array CCD data acquisition; Second, the transmission speed between linear array CCD and ARM processor; the third is the data transmission speed between ARM processor and computer. The following will be described in detail. Linear array CCD acqui

15、sition speed Acquisition speed is a critical performance indicator for image sensor, TOSHIBA Companys TCD1209D linear array CCD is used to meet the targets. Its clock pulse frequency can operate as high as 20MHz, especially suitable for high-speed conditions of size measurement and dynamic analysis.

16、Linear array CCD TCD1209D and its time sequence diagram are shown in figure 2. Transmission speed between CCD and ARM processor In order to improve the speed of CCD data acquisition and reduce conversion time, adopting high speed A/D converter can make it exchange data with ARM processor at high-spe

17、ed. ADC08200, Analog Companys nanosecond conversion device is adopted. Its a single-channel, 8-bit A/D converter, which operates over a wide range of temperature, converts fast, operates at conversion rates up to 230 MSPS, thus achieving entire signal acquisition of linear array CCD. ADC08200 is sho

18、wn in figure 3.PC-side USB device driver is completed by WinDriver. Data communication between PC and USB equipment mainly includes two aspects: first, read the sample data; second, send control commands to the acquisition system. 中文翻译：基于ARM和线阵CCD的高高速数据采集系统摘要：本文提出了一种基于ARM的线阵CCD高速数据采集系统，高速线阵CCD高速ADC的

19、选择。作为A/D采样速度比臂的工作时钟频率较慢，CPLD和FIFO作为I / O A/D与ARM之间。它使电路工作在和谐，简单，易于控制，并且增加臂的效率。为了提高通信速度，通用串行总线（USB）技术是通过与PC机通信的关键是利用ARM处理器控制数据采集，数据的计算和数据传输。作为一个结果，整个系统工作的有效性。该系统可应用于高速数据采集和多路模拟信号的工作环境下。关键词：臂；线阵CCD；接触线；受电弓；交错价值一、引言在电气化铁路，为了扩大对电力机车受电弓的寿命，使受电弓滑块磨损均匀，接触线（电气化铁路供电线）在直线段设置为锯齿形路线（设置折线的形式的曲线段）。定位点和受电弓轨道中心线的接触

20、线之间的距离称为拉出值，这是接触线的关键指标。参差不可忽视的价值，值过小，会影响受电弓滑板磨损均匀，延长使用寿命的目的；否则，在某些情况下（如陷入激烈的风），使屋顶的横向移动幅度大（和更大的受电弓左右摆动的速度，更高的），接触线的部分将在受电弓的有效工作长度过剩，使接触线拉出值超出标准范围，导致当前集合的恶化，甚至造成受电弓的事故不正确运行。弓网故障会导致列车运行中断，严重影响铁路运输。为了避免这些现象，拉出值及其变化，应定期测试。因此，一个机车接触线监控系统及其配套的数据采集系统的开发，并计算瞬时拉出值迅速。系统组件该系统由以下几部分组成：（1）使用东芝公司的高速线阵CCD实现接触线图像的数

21、字化（CCD输出的位置对应的时间序列的信号）；（2）采用Atmel公司的AT91RM9200 ARM9芯片实现数字信号的采集和处理；（3）使用PDIUSBD12 USB接口装置完成测量系统与PC机之间的数据通信由于其改进的哈佛结构的特点，特别说明和快速实现各种信号处理，ARM处理器被广泛应用于图像处理，通信，雷达，声纳，精密机械等领域，ARM处理器通过其运算速度和总线宽度。作为实时信号分析和计算需要计算一个高速，ATMEL公司的ARM chip-at91rm9200选择。该芯片是基于ARM920T，高性能，低功耗1632位RISC（精简指令集计算机）的微控制器，其中包含了一套丰富和产品应用提供

22、一个单芯片解决方案，为工业控制应用需要各种外设在低功耗和严格稳定的工作。三、实时处理和CCD数字图像传输为了实现实时数字图像影响传输，实时传输的几个主要因素，必须解决：第一，线阵CCD数据采集的速度；第二，线阵CCD和ARM处理器之间的传输速度；第三是ARM处理器和计算机之间的数据传输速度。以下将详细描述了。线阵CCD采集速度采集速度是图像传感器的关键绩效指标，东芝公司的TCD1209D线阵CCD用于满足目标。时钟脉冲频率可高达20MHz，特别适用于高速条件下的尺寸测量和动态分析。 CCD和ARM处理器之间的传输速度为了提高CCD数据采集速度和减少转换时间，采用高速A/D转换器可以使它在高速的

23、ARM处理器的数据交换。adc08200，采用模拟公司的纳秒转换装置。这是一个单通道，8位A / D转换。 PC端USB设备驱动程序采用Windriver完成。PC机与USB设备之间的数据通信，主要包括两个方面：第一，阅读样本数据；第二，发送控制命令的采集系统。 生命列车The Train Of Life 1. 不久以前，我读了一本书。书中把人生比作一次旅行。2. 人生一世，就好比是一次搭车旅行，要经历无数次上车、下车; 时常有事故发生; 有时是意外惊喜，有时却是刻骨铭心的悲伤 3. 降生人世，我们就坐上了生命列车。我们以为我们最先见到的那两个人-我们的父母，会在人生旅途中一直陪伴着我们。 4

24、. 很遗憾，事实并非如此。他们会在某个车站下车，留下我们，孤独无助。他们的爱、他们的情、他们不可替代的陪伴，再也无从寻找。 5. 尽管如此，还会有其他人上车。他们当中的一些人将对我们有着特殊的意义。 6. 他们之中有我们的兄弟姐妹, 有我们的亲朋好友。我们还将会体验千古不朽的爱情故事。7. 坐同一班车的人当中，有的轻松旅行。8. 有的却带着深深的悲哀 还有的,在列车上四处奔忙，随时准备帮助有需要的人 9. 很多人下车后，其他旅客对他们的回忆历久弥新 但是，也有一些人，当他们离开座位时，却没有人察觉。10. 有时候，对你来说情深义重的旅伴却坐到了另一节车厢。你只得远离他，继续你的旅程。11. 当

25、然，在旅途中，你也可以摇摇晃晃地穿过自己的车厢，去别的车厢找他 12. 可惜，你再也无法坐在他身旁，因为这个位置已经让别人给占了 .13. 没关系。旅途充满挑战、梦想、希望、离别 就是不能回头。因此，尽量使旅途愉快吧！14. 善待旅途上遇见的所有旅客，找出人们身上的闪光点。15. 永远记住，在某一段旅程中，有人会犹豫彷徨，因为我们自己也会犹豫彷徨。16. 我们要理解他人，因为我们需要他人的理解。17. 生命之谜就是：我们在什么地方下车？坐在身旁的伴侣在什么地方下车？我们的朋友在什么地方下车？我们无从知晓 18. 我时常这样想：到我该下车的时候，我会留恋吗？我想我还是会的。和我的朋友分离，我会痛

26、苦。让我的孩子孤独地前行，我会悲伤。 我执著地希望在我们大家都要到达的那个终点站，我们还会相聚 19. 我的孩子们上车时没有什么行李，如果我能在他们的行囊中留下美好的回忆，我会感到幸福。20. 我下车后，和我同行的旅客都还能记得我，想念我，我将感到快慰。21. 献给你, 我生命列车上的同行者, 祝您旅途愉快!1. Not long ago, I read a book, in which a mans life was compared to a journey.2. The life of a man is just like a hitchhiking，during which many

27、times we go up and down. Now and then things will happen accidently, some of which are to be unexpected excitement，while some heart-breaking sorrows. 3. When first embraced the world，we are already on the train of life. We take it for granted that the first two persons, our parents, whom we are enco

28、untered with, will accompany us all the way.4. Sadly，things do not go on as we thought.Our parents will get off the train at a certain station，leaving us, bereft and helpless.Their love and emotion to us and their irreplaceable company can be found in nowhere.5. However，there will be somebody else w

29、ho will get on the train. Some of them will have special meaning to us.6. Some of them may be our siblings , relatives and friends, and we will also expereince the imperishable love.7. Some of our travelling companions are quite light-hearted on the way.8. While some may bear immense sorrow.Still so

30、me ,back and forth, are ready to hold out their hands for others who need help.9. Some people alight off the train, yet they are still kept in the mind of the other passengers for long;some, to the opposite, leave their seats without being noticed.10. Sometimes, the one,who is dear to your heart, ha

31、s huddled into another carriage. Nothing but one you can do is just to keep on going, far away from him.11. Of course, during the journey, you may stagger to another carriage to look for him.12. Its a pity that you will never seat yourself beside him because the seat has been engaged by others. 13.

32、Never mind. The journey is full of challenges,dreams, hopes and departures- but only one thing is that you cant turn back. So, have a good journey with heart and soul.14. Show your good-will to all the passengers you are encountered with, and find the merits of theirs.15. Remeber that someone may oscillate just as we do in the journey.16. We should understand others just as we need others understanding.17. The enigma of life is：Where shall we get off the train of life?And how about the compani