Vehicle collision accident reappearance method based on phototopography and exterior profile deformation of car body

Abstract

The invention relates to an automobile collision accident reconstruction method based on photogrammetric survey and outer contour deformation of car body, comprising the following procedures: first, carrying out photogrammetric survey for the accident-related deformed automobile and an intact automobile with the same type of the deformed automobile; second, establishing a three-dimensional numerical model of outer contour of the accident-related deformed automobile and the intact automobile with the same type of the deformed automobile; third, comparing the standard model and the deformation numerical model to get deformation degree and angle at feature points; fourth, establishing finite element model of accident site environment and corresponding deformed parts of accident-related automobile; fifth, through multiple iterative optimization computation, the numerical simulation results are consistent with measuring results of actual collision under the conditions of specified speed and collision angle, thereby accurately determining the automobile speed and collision angle when the accident happened. The invention has the advantages of capacity of accident reconstruction based on the information of accident site, effectively improved accident reconstruction efficiency, practicability and visual effect.

Description

technical field [0001] The invention relates to a method used in the technical field of transportation, in particular to a method for reproducing an automobile collision accident based on photogrammetry and deformation of the outer contour of a vehicle body. Background technique [0002] In order to reproduce the analysis of automobile collision accidents, usually from multiple angles such as energy and momentum, according to the characteristic parameters of the collision stage (such as vehicle deformation characteristics, rebound coefficient, contact surface friction coefficient, collision center, etc.) Image, use lumped parameter model method and multi-rigid body system dynamics method to analyze the accident. At present, the commonly used accident analysis methods in the world include impulse / momentum analysis method and deformation / energy analysis method. In addition, throwing distance analysis methods, geometric and time analysis methods, and centrifugal force analysis ...

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Problems solved by technology

However, on the one hand, the three-coordinate measuring instrument is relatively expensive, on the other hand, it needs professionals to operate, and it takes a long time. In addition, the finite element model of the whole vehicle used in this method makes the modeling and simulation calculation process extremely consuming. time, the efficiency of accident reproduction is greatly reduced, which does not meet the requirements for rapid handling of traffic accidents

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