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Detection method and detection system for copper wire surface oxidation defects of FPC

A surface oxidation and defect detection technology, which is applied in image data processing, instruments, character and pattern recognition, etc., can solve the problems of large influence on detection results, high false detection rate, and increased labor load

Active Publication Date: 2017-11-24
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the factory mainly uses manual visual inspection for the detection of oxidation defects and oxidation degree on the surface of FPC copper wire, which not only greatly increases the labor load, but also has a high false detection rate, and the detection results are greatly affected by subjective factors.

Method used

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  • Detection method and detection system for copper wire surface oxidation defects of FPC
  • Detection method and detection system for copper wire surface oxidation defects of FPC
  • Detection method and detection system for copper wire surface oxidation defects of FPC

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Embodiment

[0086] This embodiment discloses a method for detecting oxidation defects on the surface of an FPC copper wire, the steps are as follows:

[0087] S1, first collect a certain number of FPC sample images, then manually extract the copper wire surface oxidation defect ROI (region of interest) of these FPC sample images, and artificially mark the oxidation degree level of the above-mentioned extracted copper wire surface oxidation defect ROI; For each oxidation degree grade, select a certain number of copper wire surface oxidation defect ROIs belonging to the oxidation degree grade respectively, as training samples for the oxidation degree grade, and obtain the training sample set;

[0088] In this embodiment, the total number of oxidation degree grades of the copper wire surface oxidation defect ROI is 3. In this embodiment, for each oxidation degree grade, 30 copper wire surface oxidation defects belonging to the oxidation degree grade are selected respectively. ROI, as a train...

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Abstract

The invention discloses a detection method and a detection system for copper wire surface oxidation defects of an FPC. The detection system comprises an image collection apparatus and an image processing unit. The detection method comprises the steps of firstly collecting a certain number of FPC sample images, extracting copper wire surface oxidation defect ROIs, manually tagging oxidation levels, and selecting the copper wire surface oxidation defect ROIs with the oxidation levels as training samples; extracting color features of the training samples; inputting the color features of the training samples to a DAG-SVMS model for training to obtain a DAG-SVMS classifier; collecting to-be-detected FPC sample images, and extracting copper wire surface oxidation defect ROIs to serve as test samples; and extracting color features of the test samples, inputting the color features of the test samples to the DAG-SVMS classifier, and determining oxidation levels of the test samples through the classifier. According to the detection method and system, accurate detection of the copper wire surface oxidation defects and oxidation levels of the FPC can be realized.

Description

technical field [0001] The invention belongs to the technical field of machine vision surface defect detection, in particular to a method for detecting oxidation defects on the surface of an FPC copper wire and a detection system thereof. Background technique [0002] FPC (Flexible Printed Circuit) is a printed circuit board that uses copper foil corrosion to form lines on the surface of polyimide substrates. It has the characteristics of light weight, small size, bendability, high reliability and convenient installation. It changes the traditional interconnection technology and realizes any three-dimensional interconnection. It can move, expand and contract freely in three-dimensional space, and deform freely, so as to achieve the integrated connection of electronic components and printed circuit board wires. FPC is widely used. At present, the number of FPCs used in a smartphone or tablet computer is 8 to 10 pieces; the amount of a liquid crystal display is about 2 to 4 pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06K9/62
CPCG06T7/0004G06T2207/30141G06F18/2411G06F18/214
Inventor 罗家祥李璐胡跃明
Owner SOUTH CHINA UNIV OF TECH
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