Self-adaptive dynamic displacement measuring device and application thereof to body-in-white static stiffness test

Abstract

The invention discloses a self-adaptive dynamic displacement measuring device, which comprises a first rod piece, a second rod piece, a first bracket and a second bracket, wherein the first rod piece is provided with an inner part which is at least partially hollow; a first clamp unit for fixing the first rod piece on other objects is arranged at one end of the first rod piece; one end of the second rod piece is sleeved on the hollow inner part of the first rod piece in a sliding way; a second clamp unit for fixing the second rod piece on other objects is arranged at the other end of the second rod piece; the first bracket is fixedly arranged on the first rod piece, and is used for loading a displacement measuring component; and the second bracket is fixedly arranged on the second rod piece, and is contacted with a measuring head of the displacement measuring component. The self-adaptive dynamic displacement measuring device is suitable to be applied to a body-in-white static stiffness test, and has the advantages of novel structural design, convenience and reliability in use, high measuring accuracy, remarkable cost advantage and the like. Multiple flexible adjustment measures are adopted on a structural design, so that the self-adaptive dynamic displacement measuring device has very high generality and is suitable for body-in-white static stiffness tests of different vehicle forms.

Description

【Technical field】 [0001] The invention relates to the technical field of static stiffness testing of an automobile body-in-white, in particular to an adaptive dynamic displacement measuring device and its application in static stiffness testing of a body-in-white. 【Background technique】 [0002] The static stiffness index of the automobile body-in-white generally includes bending stiffness and torsional stiffness. The bending stiffness of the body-in-white can be measured by the deformation of the front and rear of the body-in-white. Therefore, the static stiffness of the automobile body-in-white is an important index to evaluate the reliability of the vehicle design and the safety performance of the vehicle, and the analysis of the torsional stiffness and bending stiffness of the automobile body-in-white is an essential key link in the development and design of the vehicle one. [0003] However, in the prior art, when testing the static stiffness of the automobile body-in...

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Problems solved by technology

[0003] However, in the prior art, when testing the static stiffness of the automobile body-in-white, there are many reasons such as the distribution of corresponding test points on the automobile body-in-white, and the requirements for displacement changes of each test point are not the same, especially because Automobile body-in-white usually has a complex curved surface structure, and the thickness of the body-in-white sheet metal parts at different positions varies greatly. Especially when the displacement measurement of the test points of the body-in-white is carried out at the front door, rear door, and tailgate, it is not very accurate and reliable. It is difficult to achieve satisfactory measurement results due to displacement measurement data, which affects the final static stiffness analysis results of the body-in-white

[0004] In addition, the existing displacement measurement tools or devices also have some problems, such as their complex structure, which is not conducive to convenient and quick operation, or the need for specially developed fixtures when applied to different models, resulting in poor versatility and increased costs Expenses, or the accuracy of the measurement data is reduced due to the measurement interference phenomenon during the test, or the reliability of the measurement is affected because it cannot actively eliminate the stress caused by the displacement change, or it is easy to contact the body-in-white of the car during the test damage to the location or the displacement measuring tool itself, etc.

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