毕业论文外文翻译-D的高速数据采集系统.doc

毕业论文外文翻译-D的高速数据采集系统
毕业设计
中英文翻译
学生姓名学号
学院
专业
指导教师
2012年 6月
High–Speed Data Acquisition System Based on ARM D
Dong Jianjun Zhao Xiaojin
Dept Four The First Aeronautical Technical College of the Air Force Xinyang 464000China
Abstract This paper presents a high speed acquisition system of D based on ARM high-speed D and high-speed ADC are selected As the sampling speed of AD is slower than the working clock frequency of ARM CPLD and FIFO are used as IO between AD and ARM It makes the circuit works harmonious simple and easy controlling and also increases the efficiency of ARM In order to increase munication speed the Universal Serial Bus USB technology is adopted municate with the PC ARM is the key processor utilized to control the data sampling pute 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 D Contact-line Pantograph Stagger –value
I Introduction
In electrification railways in order to extend the life of the pantograph on electric otives 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 pantograph swing around some parts of contact-line will be in excess of the effective work length of pantograph so that the stagger-value of contact-line beyond the standard range leading to deterioration of the current collect