Bottle cap unqualified product marking method based on machine vision

A marking method and technology for qualified products, applied to instruments, scientific instruments, measuring devices, etc., to achieve the effects of good real-time performance, high accuracy, and fewer steps

Inactive Publication Date: 2016-03-23
TIANJIN UNIV
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of manual detection and the limitations of bottle cap detection, and provide a method for online labeling of unqualified bottle caps based on machine vision

Method used

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  • Bottle cap unqualified product marking method based on machine vision
  • Bottle cap unqualified product marking method based on machine vision
  • Bottle cap unqualified product marking method based on machine vision

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.

[0024] see figure 1 , a system device for marking unqualified bottle caps based on machine vision, which is divided into 6 modules functionally, namely conveyor belt 1, image acquisition module 2, photoelectric trigger 3, lighting module 4, image processing and recognition 5 and output control device6. The above-mentioned image acquisition module 2 uses a 1.2 million-pixel CCD camera, the lighting module 4 uses an LED ring light source, and the image processing and recognition module 5 uses an industrial computer. The output control device consists of a nozzle controlled by a solenoid valve. The conveyor belt 1 transports the bottle to be tested to the photographing station, and the photoelectric trigger device 3 is used to detect whether the bottle arrives at the photographing position, so as to generate a pulse signal and deliver it to the ind...

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Abstract

The invention relates to a bottle cap unqualified product marking method based on machine vision. The surface of a bottle cap to be tested is illuminated with an LED white annular light source, and the method includes the following steps that firstly, image information of qualified bottle caps is collected; secondly, an image of the bottle cap to be tested is collected; thirdly, the image preprocessed through median filter is subjected to binarization processing; fourthly, round locating is carried out, the edge of the bottle cap is found and serves as a round edge, and a coordinate system is built with the circle center as an original point; fifthly, the upper limit and the lower limit of the number of pixels of a detection target are preset according to the number of pixels of production date sprayed codes on the qualified bottle caps, the interior of a circle is set to be a region of interest (ROI) by means of the obtained round edge and the built coordinate system, the production date sprayed codes in the ROI serve as detection targets, and bottle cap detection is conducted; sixthly, unqualified products are marked. The algorithm which is used is simple, the number of steps is small, quick detection of images is achieved, detection efficiency is high, the method is little influenced by the environment, and accuracy is high.

Description

Technical field [0001] The invention relates to a method for marking unqualified products of bottle cap detection, which belongs to the field of machine vision. Background technique [0002] In industrial production lines such as beverages and beer, most of them use manual visual inspection to check whether the bottles are qualified. Especially in the production of bottle caps, it is necessary to print the production date on the bottle caps, and there may be situations where the spray code is blurred or missed. Because human eyes are prone to visual and physical fatigue, the efficiency is often very low, which will cause missed or false detections, and the labor cost is also getting higher and higher. The flow of these substandard products into the market will cause consumers to distrust the quality of the products, affect sales, and even cause problems such as drinking expired products by mistake and endangering health. [0003] Aiming at the above-mentioned defects of ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/898
CPCG01N21/898G01N2021/8909
Inventor 刘影吕辰刚郭玺丁珏杨嘉琛米岩陈德胜
Owner TIANJIN UNIV
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