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Measuring method for vehicle body deformation amount in vehicle crash test

A technology of collision test and measurement method, which is applied in the direction of mechanical solid deformation measurement, measuring device, mechanical measuring device, etc., can solve the problems of increased deviation of measured deformation and cannot ensure the same position of vehicles, etc., to achieve good flexibility, High-precision, high-speed effects

Active Publication Date: 2009-11-04
CHINA AUTOMOTIVE TECH & RES CENT
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, for the measurement of vehicle body deformation in the automobile crash test, it cannot be guaranteed that the position of the vehicle before and after the crash test is the same, and the deviation of the measured deformation may increase.

Method used

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  • Measuring method for vehicle body deformation amount in vehicle crash test
  • Measuring method for vehicle body deformation amount in vehicle crash test
  • Measuring method for vehicle body deformation amount in vehicle crash test

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Embodiment Construction

[0018] The vehicle body deformation measurement system adopted by the present invention is mainly composed of a mobile three-coordinate measuring instrument and a measurement platform (unevenness 0.3%). The mobile three-coordinate measuring machine is different from the gantry three-coordinate measuring machine. The track of the gantry type three coordinate measuring instrument is fixed on the ground and cannot be moved. It measures by moving two arms. Compared with the movable three-coordinate measuring instrument, this measuring method has both advantages and disadvantages. The advantage is that there is no need to move the coordinate system, the coordinate system is the track axis, and the measuring arm can be measured in three directions, namely x, y, and z, without errors caused by changing the coordinate system. However, for the measurement of vehicle body deformation in a car crash test, it cannot be guaranteed that the vehicle is placed in the same position before and afte...

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Abstract

The invention belongs to the technical field of transport vehicle test measurement, and relates to a measuring method for the vehicle body deformation amount in a vehicle crash test. The measuring method comprises the following steps: carrying out levelness calibration and establishing a measurement platform; selecting three points which are not in a straight line on a rigid part of the rear part of the vehicle body not being deformed before or after vehicle crash and are contour in the vertical direction from a basal plane, making a translation plane cross the three points, and establishing a three-dimensional coordinate system on the translation plane; carrying out the crash test; making the translation plane before the crash and the plane determined by the non-deformed points after the crash be mutually coincided through the alignment of the positions of the points which are not deformed and are selected before and after the crash, and consequently adjusting the coordinate system; and subtracting the coordinate of the same point on the test vehicle body after the crash from a certain point on the test vehicle body before the crash to obtain the deformation amount of the vehicle body at the point. The method can reduce the deviation of the measured deformation amount and improve the measuring precision.

Description

Technical field [0001] The invention belongs to the technical field of test measurement of transportation vehicles, and specifically relates to a method for measuring the deformation of the vehicle body before and after a collision test. Background technique [0002] Car crash test is the most basic and effective method to comprehensively evaluate car crash safety performance. It starts from the viewpoint of occupant protection, and analyzes the occupant and vehicle motion state and damage status before and after the vehicle collision by reproducing the traffic accident, and analyzes the stiffness and strength of the vehicle body through the deformation of the vehicle body before and after the collision test to ensure the occupants The living space provides test data for the crashworthiness design and development of the car body. In the prior art, a gantry-type three-coordinate measuring instrument is usually used to measure body deformation. The advantage of this measuring metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/30G01B5/008G01M7/08
Inventor 孙振东吕恒绪刘桂彬龙海靖
Owner CHINA AUTOMOTIVE TECH & RES CENT
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