毕业设计论文外文文献中英文翻译光信息科学与技术光电目标位置和速度测量系统中英文对照.doc

毕业论文 英文文献及中文译文 学生姓名： 学号：0506340345 学 院： 信息与通信工程学院 专 业： 光信息科学与技术 指导教师： 2009年 6 月 Electro-optical target system for position and speed measurement Abstract This paper introduces an electro-optical target system(EOTS) covering the speed range from subsonic to supersonic. This microcomputer-based system has a novel structure and shows the capability of precisely detecting the position as well as the velocity of small caliber projectiles in real time. A prototype EOTS whose target area is 1m2 has been constructed and tested. A speed accuracy of better than 0.3% was achieved. A position accuracy, mainly dependent on the spacing between photodiodes in EOTS, of better than 1mm on a target area of 1m2was also accomplished. Keywords: External ballistics, No contact measurement, Electro-optical techniques, Position measurement, Speed measurement 1 Introduction The speed and position measurements of projectiles are two important items in ballistic research. To determine these parameters precisely one needs an accurate measuring system. A conventional method, namely the hanging up(and taking down) of target discs[l], though accurate in position measuring, is time consuming. A shot-position indicator(SPI), described in Reference 2, can measure the position of a high speed projectile by acoustic measurement. However, the SPI does not provide the speed information; neither does the conventional method. Besides, the SPI is used within the limits of supersonic projectiles. To measure the speed and position of projectiles rapidly and simultaneously, different electro-optical based systems have been proposed 3-5]. These systems have the ability to cover the speed range from subsonic to supersonic. One system, called the target measurement system(TMS)[3], uses vertical and horizontal banks of light sources to form two perpendicular light grids that construct the target area. Another system, called the electro-optical projec