高速车载数字图像采集关键技术研究  

Research on Key Technology of High-Speed and on-Board Acquisition of Digital Image

作　　者：戴鹏[1] 王卫东[1] 任盛伟[1] 韩强[1] 李唯一 

机构地区：[1]中国铁道科学研究院基础设施检测研究所,北京100081 [2]北京铁科英迈技术有限公司,北京100081

出　　处：《计算机测量与控制》2014年第1期267-269,共3页Computer Measurement &Control

基　　金：国家863计划项目(2011AA11A102)

摘　　要：研究了高速车载数字图像采集技术的设计原理及软件模型。阐述了应用线阵相机进行运动扫描获取无冗余图像的驱动控制方法,并推导了采集频率与图像分辨率之间的约束关系;介绍了基于反馈控制原理的参数自动调节技术;在采集软件设计上,提出了一种基于事件驱动的三级处理存储模型。对技术在高速铁路轨道、接触网数字采集系统设计中的应用成果进行了展示,系统以1.62mm分辨率在160km/h速度条件下完成图像采集,其图像最高分辨率可达0.54mm。The design principle and software model of the high speed and on--board acquisition is researched. The control method to get irredundant images with the movable scanning linear CCD camera is discussed, and the constraint relation between sampling frequency and image resolution is deduced. Automatic parameter adjustment technology based on the feedback control is introduced. A three level process and storage model of the acquisition software with the event--driven strategy is proposed. A series of applications on taking photographs in the track and catenary of high-- speed railway is shown. The acquisition system can capture the images with 1.62mm resolution at the 160km/h, and the highest resolution up to 0.54mm.

关 键 词：高速车载采集 线阵相机 反馈控制 事件驱动 高速铁路 

分 类 号：U213.4[交通运输工程—道路与铁道工程]