基于路面影子计算车速方法优化与误差分析  

Optimization and Error Analysis of Vehicle Speed Calculation Method Using Road Shadows

作　　者：丁星兵 王迪 黄磊 何仲华 DING Xingbing;WANG Di;HUANG Lei;HE Zhonghua(Judicial Authentication Center,Yunnan Academy of Transportation Science Company Limited,Kunming 650011,China)

机构地区：[1]云南省交通科学研究院有限公司司法鉴定中心,云南昆明650011

出　　处：《汽车实用技术》2024年第23期55-60,共6页Automobile Applied Technology

基　　金：云南交通科学研究院科技创新项目“基于特殊视频车速计算方法研究”(JKYZLX-2021-39)。

摘　　要：在道路交通事故车速鉴定领域,通过影子计算车速法是一种基于车辆特征点在路面形成的影子移动距离及对应的时间来计算车速的非常规方法,该方法的准确性受光源类型、位置以及环境条件等因素影响。文章基于对影子计算车速法进行研究,分析使用自然光源和人造光源形成的影子来计算车速,其对车速计算结果准确性的影响,并探讨了相应的误差成因。通过理论分析与实例验证,创造性地提出减少误差的具体策略和三种新颖、独特的使用方法,旨在减少车速计算误差,提高结果的准确性。In the field of vehicle speed identification in road traffic accidents,the shadow speed measurement method is an unconventional approach that calculates vehicle speed based on the moving distance of the shadow formed by vehicle characteristic points on the road surface and the corresponding time.The accuracy of this method is affected by factors such as the type and position of the light source,as well as environmental conditions.This paper studies the shadow speed measurement method,analyzes the impact of using shadows formed by natural and artificial light sources on the accuracy of speed calculations,and discusses the corresponding causes of errors.Through theoretical analysis and practical verification,specific strategies for reducing errors are creatively proposed,along with three novel and unique practical methods aimed at minimizing speed calculation errors and improving the accuracy of results.

关 键 词：肇事车辆速度 光源类型 车辆特征点 路面影子 车速误差分析 数据准确性 

分 类 号：U473[机械工程—车辆工程]