Method for detecting composite material orifice splitting caused by drilling
A composite material and detection method technology, which is applied in image analysis, image enhancement, instruments, etc., can solve the problems of high original image quality requirements, inapplicability, and high hardware cost control costs, so as to improve detection data processing efficiency and accurate splitting recognition. efficiency, reduce production costs, and meet the effects of complex industrial production sites
Active Publication Date: 2022-07-29
SOUTHWEST JIAOTONG UNIV
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This method requires multiple light sources as actuators, hardware costs and timing control of light sources and cameras are required, so the control cost is high
In the literature (Image Analysis Quality Assessment of CFRP Drilled Holequality assessment.), a method for detecting the quality of hole holes based on digital images is proposed. However, this method requires an RGB image as the original image, so the high quality of the original image is not suitable for Industrial production sites with complex lighting conditions
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[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0026] see Figure 1-5 , an embodiment provided by the present invention: a method for detecting splitting of a composite material orifice caused by hole making, comprising the following steps: step 1, acquiring an image; step 2, binarization processing; step 3, extracting the edge of the inner hole Contour coordinates; Step 4, obtain the center and radius of the inner hole edge; Step 5, clean up noise; Step 6, image morphological pr...
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The invention discloses a method for detecting composite material orifice splitting caused by drilling. The method comprises the following steps: step 1, acquiring an image; step 2, carrying out binarization processing; 3, extracting coordinates of the edge contour of the inner hole; 4, obtaining the circle center and radius of the edge of the inner hole; step 5, noisy point cleaning; step 6, image morphological processing; 7, extracting edge contour coordinates of the hole splitting area; step 8, obtaining the maximum radial fracture of the orifice; wherein in the step 1, two images are acquired for each hole; wherein in the step 2, Boolean operation is carried out on the collected image without the bottom light and the image with the bottom light, an image IC with the main information only being the inner hole is obtained, and IC = IB-IA; carrying out binarization on the image IC by taking 150 / 256 as a threshold value to obtain a binary image I 'C; according to the composite material orifice splitting detection method, the detection data processing efficiency of composite material orifice splitting and the splitting recognition accuracy are improved, meanwhile, the production cost is reduced, and the requirement for a complex industrial production site is met.
Description
technical field [0001] The invention relates to the technical field of machining process monitoring, in particular to a method for detecting splitting of a composite material orifice caused by hole making. Background technique [0002] Composite laminates are widely used in commercial aircraft due to their excellent mechanical properties and lightweight characteristics. These components play an important role in bearing loads and ensuring structural strength and stability. According to statistics, 70% of the fatigue failure accidents of the aircraft body originate from the structural connection parts, and 80% of the fatigue cracks appear at the connection holes. Therefore, high-quality assembly holes are one of the important factors to ensure the safety of the aircraft. However, due to the anisotropy and low connection strength between the layers of the composite material, it is difficult for the worn tool to ensure the quality of the hole during the cutting process, and i...
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IPC IPC(8): G06T7/00G06T7/11G06T7/13G06T7/136G06T7/62G06T7/70G06T5/00G06T5/20
CPCG06T7/0004G06T7/11G06T7/13G06T7/136G06T7/62G06T7/70G06T5/20G06T2207/10004G06T2207/20036G06T2207/20024G06T2207/30108G06T5/70
Inventor 高宏力李长根郭高由智超李世超刘岳开邓斌吴向东
Owner SOUTHWEST JIAOTONG UNIV