Method of detecting tooth defects of wedges based on edge detection

A technology of edge detection and defect detection, applied in image data processing, instruments, calculations, etc., can solve the problems of slow manual detection, human error, low efficiency, etc., to improve the degree of production automation and product quality, fast detection speed , the effect of accurate positioning

Inactive Publication Date: 2018-07-13
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the technical problem solved by the present inventi

Method used

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  • Method of detecting tooth defects of wedges based on edge detection
  • Method of detecting tooth defects of wedges based on edge detection
  • Method of detecting tooth defects of wedges based on edge detection

Examples

Experimental program
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Embodiment 1

[0044] Such as figure 1 Shown is a method for detecting a clip tooth shape defect based on edge detection, comprising the following steps:

[0045] (1) Image acquisition and preprocessing of the clip workpiece;

[0046] (2) Perform image template matching positioning and image cropping on the workpiece;

[0047] (3) Carry out edge detection to the image;

[0048] (4) Perform median filtering and morphological processing on the image;

[0049] (5) Carry out feature extraction and discrimination.

[0050] In step (1),

[0051] The image acquisition of the clip workpiece is through the forward illumination of a red bowl-shaped diffuse reflection light source, and the image of the clip workpiece is collected by using a CCD industrial camera and an image acquisition card. The image of the workpiece is an RGB image, and then the image of the workpiece is transmitted to the host computer;

[0052] The preprocessing is to perform grayscale conversion and grayscale adaptation on t...

Embodiment 2

[0081] according to figure 1 In the principle flow chart in the example 1, defect features are extracted through the image processing algorithm in embodiment 1, and a discrimination rule base is formulated through data analysis and statistics.

[0082] Description of the overall process: The clip workpiece to be inspected is transmitted to the inspection station through the feeding mechanism, the photoelectric sensor triggers the camera to take pictures and collects a frame of image and transmits it to the industrial computer in real time, the upper computer performs defect detection through the defect detection algorithm, and reports the detection results Send it to the lower computer through serial communication. The lower computer will eliminate the unqualified products according to the inspection results, and the qualified products will enter the next process, and finally realize the intelligent sorting of the workpieces.

[0083] The invention effectively solves the prob...

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Abstract

The invention discloses a method of detecting tooth defects of wedges based on edge detection, comprising the steps of (1) acquiring an image of a wedge workpiece, and preprocessing the image; (2) subjecting the wedge workpiece to image template match positioning and image cutting; (3) subjecting the image to edge detection; (4) subjecting the image to median filtering and morphological processing; (5) performing characteristic extraction and judging. The method is capable of detecting and recognizing tooth defects (flat teeth, broken teeth, overlap teeth and polished plates) of wedges accurately on a production line site, the problem that existing manual detection has low speed, low efficiency and high cost is effectively solved, automation level of wedge production is increased, productquality is improved, and the method has good robustness.

Description

technical field [0001] The invention relates to the technical field of automatic detection of building construction, in particular to a method for detecting defects of clip teeth based on edge detection. Background technique [0002] With the development of prestressed anchorage technology, clip anchors (referred to as clips) account for an increasing proportion of prestressed anchorage projects, and are widely used in various bridges, roads, high-rise buildings and other building constructions. Clips It is one of the important basic parts of the prestressed anchoring system. The quality of the tooth shape of the working surface directly affects the safety of the prestressed structure. If the workpiece with tooth quality defects enters the market, it may lead to a serious accident in the building. It has greatly damaged social security and people's property, and also brought great economic losses and liability risks to production enterprises. [0003] Therefore, the detecti...

Claims

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Application Information

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IPC IPC(8): G06T7/13G06T7/00G06T7/136
CPCG06T7/0004G06T2207/20032G06T2207/30164G06T2207/30168G06T7/13G06T7/136
Inventor 王健唐滔曾庆宁
Owner GUILIN UNIV OF ELECTRONIC TECH
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