Carbon tube array honeycomb surface shape precision calculation method based on processing G code guidance

Abstract

The invention provides a carbon tube array honeycomb surface shape precision calculation method based on processing G code guidance. The method comprises the following steps: acquiring a measurement G code conforming to the surface profile of a design model; measuring honeycomb surface shape data of the carbon tube array for multiple times through line laser equipment, and generating a plurality of pieces of three-dimensional point cloud data; splicing and denoising the obtained multiple pieces of point cloud data to obtain a complete surface shape of the surface of the workpiece, and storing the complete surface shape as measurement point cloud data; performing matrix transformation on the measurement point cloud data according to the initial position information of the G code to obtain a new position point cloud, and performing coarse registration on the design model and the new position point cloud; and projecting the new position point cloud to a surface patch of the design model to obtain model point cloud corresponding to the number of the measured point cloud points, after registration, calculating the length of a vertical line from the point cloud to the corresponding surface patch to obtain an error length set, and calculating the surface shape error according to the error length set. The measuring point cloud and the model are high in overlap ratio, and the method is suitable for various curved surfaces difficult to measure.

Description

technical field [0001] The invention relates to the field of large-scale curved surface shape detection of a composite material antenna reflection panel, in particular to a method for calculating the surface shape precision of a carbon tube array honeycomb based on the guidance of processing G codes. Background technique [0002] In the field of complex surface shape detection, the surface shape detection and evaluation of high-precision surfaces has become the main trend of today's development because of its leading role in subsequent correction work. However, most of the current surface shape accuracy detection methods are mostly for continuous and obvious feature surfaces, and most of the results rely on some reverse engineering software. If the workpiece has no obvious sharp features, many repetitions are often required to obtain more reliable results. [0003] Among the surface shape accuracy calculation methods, the research methods of plane and parametric models are ...

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Problems solved by technology

[0006] 3. The carbon tube array honeycomb measurement point cloud is in the shape of a cylindrical point cloud with an array distribution, and there are no obvious feature points;

[0007] None of the surface shape calculation methods is suitable for carbon tube array honeycombs, so in view of this problem, it is necessary to provide a calculation method for the surface accuracy of discontinuous large-scale carbon tube array honeycombs

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