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Method for identifying honeycomb edge area from honeycomb core surface measured data

A surface measurement, honeycomb core technology, applied in measurement devices, instruments, optical devices, etc., can solve the problems of data noise reduction and simplification that are difficult to achieve reasonably

Active Publication Date: 2018-03-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the discontinuity of the honeycomb core, it is difficult to reasonably achieve the noise reduction and simplification of the data after laser measurement

Method used

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  • Method for identifying honeycomb edge area from honeycomb core surface measured data
  • Method for identifying honeycomb edge area from honeycomb core surface measured data
  • Method for identifying honeycomb edge area from honeycomb core surface measured data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] 1. Obtain the three-dimensional surface data of the honeycomb core surface

[0100] The laser displacement sensor selected in this embodiment is an ultra-high-speed profile measuring instrument (LJ-V7060) of Keyence Corporation.

[0101]The measuring instrument adopts blue semiconductor laser, which can realize stable and ultra-high-speed measurement, the sampling interval can reach 16μs, the repeated measurement accuracy in the Z-axis direction can reach 0.4μm, the measurement contour data interval is 20μm, and the measured laser line length is 15mm. During the measurement, the probe of the profile measuring instrument is installed on the three-axis CNC machine tool, the honeycomb core sample is fixed on the machine table, and the movement of the probe of the profile measuring instrument is controlled by the machine tool to scan the surface of the honeycomb core. When scanning the honeycomb core, scan along the L direction of the honeycomb core, and the obtained data p...

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Abstract

The invention discloses a method for identifying a honeycomb edge area from honeycomb core surface measured data. The method comprises the following steps of: obtaining three-dimensional surface shapedata of a honeycomb core surface, establishing a planar image of the honeycomb core, and identifying the vertex of the honeycomb core; scaling down the image by a certain proportion to identify the vertex; determining the threshold value of a corner detection algorithm according to the measured data; analyzing the identified vertices one by one to deterring the honeycomb edges using the verticesand endpoints; creating a search window for analyzed corner points; determining the type of the analyzed corner points, determining the target corner points of the analyzed corner points, and creatingrectangular area for the honeycomb edge.

Description

technical field [0001] The invention relates to a method for identifying honeycomb edge regions from honeycomb core surface measurement data. Background technique [0002] As an excellent high-strength and ultra-light structure, honeycomb core is widely used in aviation, aerospace, ships and high-speed trains and other fields. The honeycomb core is a lightweight core material with a sandwich structure. The upper and lower surfaces are processed by numerical control to form a specific curved surface, and the upper and lower layers of thin plates with opposite shapes are glued together to form a honeycomb core sandwich structure. The processing quality and processing accuracy of the curved surface of the honeycomb core determine the reliability of its bonding with the upper and lower sheets, which in turn affects the performance of the entire honeycomb sandwich structure. Therefore, before bonding after processing, the processing accuracy of the complex curved surface of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24G01B11/00
Inventor 董志刚康仁科秦炎朱祥龙贾振元司立坤杨洁
Owner DALIAN UNIV OF TECH