毕业设计英文文献翻译《基于ARM与线性CCD的高速数据采集系统》.doc

毕业设计 中英文翻译 学生姓名： 学号： 学 院： 专 业： 指导教师： 2011年 6月  High–Speed Data Acquisition System Based on ARM Linear-CCD Dong Jianjun Zhao Xiaojin Dept. Four, The First Aeronautical Technical College of the Air Force Xinyang 464000.China. Abstract : 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 frequency 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. 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; Contact-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 route (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 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 pantog