1、 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 机电工程学院 探测制导与控制技术 HighSpeed Data Acquisition System Based on 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
2、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 stagg
3、er-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
4、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 collection, and even cause i
5、ncorrect running of the pantograph accident. Pantograph-catenary malfunction will result in interruption of train operation, which impact 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
6、monitoring system and its mating data acquisition system were developed, which calculate the instant stagger-value quickly. II. System 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 Atmel
