Mass center measuring method
A measurement method and centroid technology, which is applied in the field of vehicles, can solve problems such as long test period, large number of test data samples, and high requirements for operating skills, and achieve the effects of convenient measurement, shortened test period, and guaranteed measurement accuracy
Pending Publication Date: 2021-10-22
CHINA FIRST AUTOMOBILE
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Problems solved by technology
The inertia measurement method has high requirements for personnel's operation skills, a large number of test data samples, a long test cycle, and the price of the modal test bench is relatively high
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[0034] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.
[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection;...
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The invention discloses a mass center measuring method, and belongs to the technical field of vehicles. The mass center measuring method comprises the following steps of suspending an object to be measured to be in a natural suspension state; establishing a measuring coordinate system of the three-coordinate measuring instrument and a whole vehicle coordinate system in the same coordinate system by adopting a method of fitting physical feature points and theoretical feature points; assembling in the whole vehicle coordinate system to obtain a first suspension vertical line; and repeating the steps, assembling to obtain a second suspension vertical line, fitting and intersecting the first suspension vertical line and the second suspension vertical line in software, and calculating the coordinates of the mass center O, the intersection point being the mass center O of the to-be-measured object. The object to be measured and the three-coordinate measuring instrument are established in the same whole vehicle coordinate system by adopting a method of fitting the physical feature points on the object to be measured with the theoretical feature points, so that the measurement precision of the coordinate O of the center of mass of the object to be measured is finally ensured, the measurement is convenient, and the test period is shortened.
Description
technical field [0001] The invention relates to the technical field of vehicles, in particular to a centroid measurement method. Background technique [0002] The position of the car's center of mass O is an important parameter in the design of the door structure and performance, which affects factors such as the door / vehicle assembly process and the door's operating comfort. When the whole vehicle is produced, the body-in-white is welded and painted and enters the final assembly. Before the final assembly, the door only has the welding assembly and hinge, and the hinge bolts have been fixed. Generally, the general assembly process does not adjust the door welding assembly and hinge, but the final assembly line needs to install Door accessories such as glass, lifters, door guards, etc. The weight of these door accessories can cause the door welding assembly to drop. This drop will affect the gap between the door gap and the engagement position of the lock ring / lock, so it i...
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IPC IPC(8): G01M1/12G01M17/007
CPCG01M1/122G01M17/007
Inventor 刘闯高猛徐传广马文龙
Owner CHINA FIRST AUTOMOBILE