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

Abstract

A method for reproducing automobile collision accidents based on photogrammetry and deformation of the outer contour of the vehicle body used in the field of transportation. The three-dimensional numerical model of the same model and intact vehicle outer contour; analyze and compare the benchmark model and the deformation numerical model, and obtain the deformation amount and deformation angle of the feature points; establish the local finite element corresponding to the accident scene environment and the vehicle deformation parts involved in the accident Model; through multiple iterative optimization calculations, under the conditions of set speed and collision angle, the numerical simulation results of the deformation of feature points are consistent with the real collision measurement results, so as to accurately determine the vehicle speed and collision angle at the time of the accident. The invention can realize accident reproduction under the condition of accident scene information, effectively improves the efficiency of accident reproduction, and has more objectivity and intuitiveness.

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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