Body bending rigidity measurement system and method

A bending stiffness and measurement system technology, applied in the field of body bending stiffness measurement system, can solve the problems of large volume of restraint device and servo loading device, inability to measure continuous measurement points of the body, limited bending deformation data, etc., to achieve accurate and reliable measurement results, Streamlined structure and simple structure

Inactive Publication Date: 2019-08-30
DONGFENG MOTOR CORP HUBEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the constraining device and the servo loading device of this patent are large in size and have visual occlusion to the side of the vehicle body. Only tension and pressure sensors can be used to measure the bending deformation of the middle part of the vehicle body, and the continuous measurement points of the vehicle body cannot be measured. The measured bending deformation of the vehicle body is Limited data, resulting in imprecise and unreliable measurements

Method used

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  • Body bending rigidity measurement system and method
  • Body bending rigidity measurement system and method
  • Body bending rigidity measurement system and method

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Experimental program
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Embodiment 1

[0038] see Figure 1-3 As shown, the embodiment of the present invention provides a vehicle body bending stiffness measurement system, which includes a body-in-white 1, a body support device 3, a load loading device 4 and a camera group 5, wherein the body-in-white 1 refers to the body-in-white before welding but not painted The body is used as the detection object of the body bending stiffness measurement test. At least one side of the body in white 1 in Embodiment 1 of the present invention is provided with a plurality of measuring points 2 arranged along the horizontal direction, wherein the number and positions of the measuring points 2 are simulated by CAE It is obtained that there are more than a dozen to dozens of measuring points 2 on the body-in-white 1. In the bending stiffness measurement test, the body-in-white 1 is first firmly fixed on the steel platform through the body support device 3. The body in the embodiment 1 of the present invention The support device 3 ...

Embodiment 2

[0047] Its basic content is the same as embodiment 1, and the difference is:

[0048] The system of Embodiment 2 of the present invention also includes a computer, which is connected to all optical cameras 50, and is used to calculate the bending stiffness of the vehicle body using a preset algorithm according to the relative position difference, ie displacement, of the measuring point 2 in the vertical direction before and after applying a predetermined load.

[0049] The default algorithm is:

[0050] k=F / x

[0051] Among them, k is the bending stiffness of the vehicle body; F is the predetermined load; x is the relative position difference in the vertical direction of the measuring point.

[0052] It should be noted that the calculation process can be performed by computer or by other means. In order to improve the calculation effect in Embodiment 2 of the present invention, it is preferable to use a computer for calculation.

Embodiment 3

[0054] Its basic content is the same as embodiment 1, and the difference is:

[0055] see image 3 As shown, the vehicle body supporting device 3 also includes a height adjustment screw 33, a sleeve 34, a ball joint 35 and a universal joint connecting sleeve 36, and the universal joint connecting sleeve 36 is connected to the bottom of the ball joint 35. end, the height adjustment screw 33 is connected with the suspension mount 32 through a ball-and-socket universal joint 35, so that the suspension mount 32 has a swing margin at a certain angle to adapt to different vehicle models and test requirements, while the suspension mount 32 It has different length specifications to meet the requirements of different vehicle models and test requirements for support height and swing allowance.

[0056] Wherein the suspension mounting part 32 is used for carrying out stable connection and fixing with the vehicle body, and its top structure is similar to the actual suspension assembly in...

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Abstract

The invention discloses a body bending rigidity measurement system and method. The measurement system comprises a white body, body supporting devices, load loading devices and a camera set; at least one side of the white body is provided with a plurality of measurement points arranged along a horizontal direction; each body supporting device comprises a supporting table and a supporting pillar connected to the supporting table; the top end of each supporting pillar is connected with a suspension mounting part; the suspension mounting parts are connected with preset suspension mounting points on the white body; the load loading devices are used for applying a preset load to a middle region of the white body; the camera set comprises a plurality of optical cameras; the plurality of optical cameras are arranged at the side on the white body, where the measurement points are arranged; shooting regions of the adjacent optical cameras form crossover regions; each crossover region at least covers one measurement point; and the camera set is used for recording relative positions of the measurement points on the white body before and after the preset load is applied.

Description

technical field [0001] The invention relates to the technical field of automobile product testing, in particular to a system and method for measuring the bending stiffness of a vehicle body. Background technique [0002] Body bending stiffness testing is an important part of automotive development testing. Usually in the laboratory environment, the body-in-white is firmly fixed on the steel platform through fixing fixtures, and the specified load is applied to specific parts of the body-in-white through the loading equipment, and dozens of micrometers are installed on the inspected parts. After the load is applied, the deformation is measured by reading the values ​​before and after loading of the micrometer at each part to determine whether the bending rigidity of the body-in-white can meet the requirements. [0003] In the traditional automobile body bending stiffness test equipment, the body support device and load loading device are used separately. Among them, the body...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M5/00G01B11/16G01M17/007
CPCG01B11/16G01M5/005G01M17/007
Inventor 刘强谷军庆方燕华刘雨路姜勇
Owner DONGFENG MOTOR CORP HUBEI
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