FasFast Triangulation and Local Optimization for Scan Data of Laser Radar

In order to study the triangulation for the point cloud data collected by three-dimensional laser radar,in accordance with the line-by-line characteristics of laser radar scanning,an improved Delaunay triangulation method is proposed to mesh the point cloud data as a triangulation irregular network.Based on the geometric topology location information among radar point cloud data,focusing on the position relationship between adjacent scanning line of the point data,a preliminary match network is obtained acc...     

Study on rotational stabilization in a laser tracking system

The high rolling speed of a missile heavily affects the stabilizing capability of the inertial platform in the laser tracking system (LTS) of the missile. In this paper, a rotational stabilizing platform (RSP) and a fuzzy-PID controller is designed to stabilize the inertial platform. This controller integrates the advantages of both fuzzy controller and classic PID controller. A comparison study is carried out to illustrate the advantages of the proposed fuzzy-PID controller over the classic PID controller. Numerical results indicate that the fuzzy-PID controller outperforms the classic one in effectively handling nonlinear disturbances and quickly stabilizing the inertial platform at the sudden change of missile rolling speed. Foundation item: the China Aerospace Science and Innovation Foundation (No. 06CASC0407)     

嵌入式激光路面平整度检测系统研究

国内外普遍采用的惯性激光平整度仪对检测速度有较高要求,难于适应我国高速公路及一、二级公路路况较差情况下的平整度检测.文中提出了一种双传感器纵断面检测原理,给出了计算机仿真结果,并设计了基于嵌入式IP2022的激光平整度检测系统.该系统可计算出被测路面的纵断面曲线,由此计算国际平整度指数(IRI).检测速度可从O～80 km/h任意变化,检测结果不受检测速度影响,非常适合我国道路交通复杂情况下的平整度检测.     

汽车安全行驶间距预警系统研究

高速公路汽车安全行驶间距预警系统具有技术先进、性能可靠、性价比高等特点,具有一定的实用价值。     

船体曲板的双目视觉测量方法

针对船舶制造现场工作环境较为复杂和船体曲板为大尺度板的情况,提出基于结构光辅助扫描的计算机双目视觉测量方法.使用张正友标定法计算摄像机的内部参数和外部参数,在图像中根据颜色空间和形态学处理初步提取激光线,根据基于海森(Hessian)矩阵的Steger算法得到亚像素级的激光中心线,根据极线匹配方法计算激光点坐标并根据二...     

裕溪船闸闸门底枢蘑菇头和轴的激光熔覆试验研究

以裕溪一线船闸扩容改造工程中34 m口门三角闸门的底枢蘑菇头和轴为研究对象,从宏观金相、微观组织、X射线衍射仪、硬度计检测熔覆层的表面硬度以及盐雾试验机测试试件的耐腐蚀性等方面,对不同的基体材料和激光熔覆粉末进行试验对比研究.结果表明:Ni40粉末和Co40粉末都具有较高的硬度和优良的耐腐蚀性能,满足底枢蘑菇头和轴激光...