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

A technology for photogrammetry and collision accidents, which is applied in the field of transportation, can solve the problems of not being able to quickly deal with traffic accidents, time-consuming modeling and simulation calculations, and reduced efficiency of accident reproduction. then the effect

Inactive Publication Date: 2008-05-07
SHANGHAI JIAO TONG UNIV
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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 use

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

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Embodiment Construction

[0036] Below in conjunction with accompanying drawing, embodiment of the present invention is described in detail: present embodiment implements under the premise of technical scheme of the present invention, has provided detailed embodiment and concrete operation process, as shown in Figure 1, but the present invention The scope of protection is not limited to the following examples.

[0037] Taking a real typical car-vehicle oblique collision accident as an example, here only the modeling and measurement of car A in the accident and the method of accident reproduction are used as examples for illustration.

[0038]Firstly, put the deformed vehicle into a rectangular area surrounded by four photogrammetric calibration objects with known relative positions. With the rectangular area as the center, the Panasonic-LX2 10-megapixel ordinary digital camera was used to make a circular image of the vehicle. shooting, as shown in Figure 2. In order to achieve a better photogrammetry ...

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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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Application Information

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IPC IPC(8): G01C11/08G01B11/16G01B11/24G06T17/00
Inventor 金先龙刘军勇张晓云郭磊杜新光
Owner SHANGHAI JIAO TONG UNIV
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