基于三维激光数据的车辆碰撞角度估算模型  

Modeling vehicle's collision angle in traffic crash based on 3D laser scanning data

作　　者：黄钢[1,2] 黄珍[3] 李平凡 吕能超[2,4] 

机构地区：[1]道路交通安全公安部重点实验室,江苏无锡214151 [2]武汉理工大学智能交通系统研究中心,湖北武汉430063 [3]武汉理工大学自动化学院,湖北武汉430070 [4]水路公路交通安全控制与装备教育部工程研究中心,湖北武汉430063

出　　处：《中国安全科学学报》2016年第9期101-105,共5页China Safety Science Journal

基　　金：国家科技支撑计划项目(2014BAG01B05);公安部技术研究课题(2015JSYJC17)

摘　　要：为定量分析道路交通事故中车辆的碰撞角度,根据胡克定律中质点位移量与受力的力学方程,构建碰撞角度与碰撞变形区域的形变量及法向量之间的数学关联模型,并提出适用于交通事故碰撞曲面法向量求解的曲面重构方法,最终建立交通事故中车辆碰撞角度的估算模型。为验证模型的正确性,进行多角度碰撞试验,根据表面碰撞前后的三维激光点云数据及提出的曲面重构算法,计算各点变形量及法向量,并代入模型验证其有效性。验证结果表明,实际碰撞角度为30-90°时,模型计算误差小于6°。In order to quantitatively analysis the vehicle？s collision angle in traffic accidents, the relationship between the collision angle, normal vector and distortion of the collision surface was studied based on the Hooke＇s law. And a traffic accident-applicable surface reconstruction method was studied to calculate the normal vector. At last, a novel model for estimating vehicle＇s collision angle in traffic accident was proposed. For verifying the validity of the model, the collision experiments with multi-angles was conducted. Each point＇s distortion and normal vector was calculated based on the surface＇s pre-collision and post-collision 3D laser scanning data and the proposed surface reconstruction algorithm. And the calculated values were substituted to the model for verifying. The results of the experiments verify that the calculated error of the model is less than 6° while actual collision angle is between 30°and 90°.

关 键 词：交通事故 三维重构 车辆碰撞角度 胡克定律 法向量 

分 类 号：X928.03[环境科学与工程—安全科学] U461.99[机械工程—车辆工程]