High-precision detection device of coin surface quality based on vision system

A vision system and surface quality technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of high difficulty in coin surface defect detection, achieve enhanced anti-stray light interference ability, high detection accuracy, reduce little reflective effect

Inactive Publication Date: 2012-03-14
CHINA BANKNOTE PRINTING & MINTING
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  • Abstract
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Problems solved by technology

[0004] The present invention aims at the problems existing in the above-mentioned prior art, and provides a coin surface quality high-precision detection device based on a visual system, which can detect defects

Method used

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  • High-precision detection device of coin surface quality based on vision system
  • High-precision detection device of coin surface quality based on vision system
  • High-precision detection device of coin surface quality based on vision system

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Embodiment Construction

[0025] With reference to the accompanying drawings, the present invention is described in detail as follows in conjunction with specific embodiments:

[0026] like Figure 1-2 As shown, there is an LED white ring light source, which adopts a low-angle 60-degree illumination method to illuminate the detection target and provide a system reference signal; after the detection target is illuminated, the surface information of the detection target will be modulated on the reference signal to form a Modulated signal;

[0027] It is equipped with a high-resolution lens, and the lens is equipped with a shading cover lens, and the above-mentioned modulated signal is imaged on the focal plane of the camera after being converged through the lens;

[0028] Equipped with a 5 million pixel high-precision CMOS camera, the camera is equipped with a supporting bracket camera, and the camera converts the optical image signal into an electronic image signal through a charge-coupled device (CCD ...

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Abstract

The invention relates to a high-precision detection device of the coin surface quality based on a vision system. The flaw location and quantification can be carried out on the surface of coins issued at home and abroad without the standard reference. According to the invention, a high-precision 5-megapixel CMOS camera and high-end imported camera lens are adopted to form a precision optical detection system, LED white ring light sources, coin acquisition is achieved through the assistance of a shading experiment platform and a graphic workstation, and the coin surface flaw detection is realized by the utilization of an image processing system. The detection content comprises spots on both sides and scratches. The detection device provided by the invention has advantages of high detection precision, complete flaw identification and the like, and can be widely applied in the coin surface quality detection.

Description

technical field [0001] The invention relates to a device for detecting the surface of coins, in particular to a high-precision detection device for coin surface quality based on a vision system for detecting defects on the surface of coins issued at home and abroad. Background technique [0002] With the development of coinage technology, it is increasingly necessary to conduct non-human defect identification, classification and defect level quantification on the surface of various coins to eliminate the subjectivity and consistency of manual detection. [0003] Evaluating coin surface quality requires localizing and quantifying surface defects. Defects on the surface of coins are divided into two categories, linear defects - scratches and area-like defects - spots. It is difficult to detect defects on the surface of various coins, mainly reflected in the difficulty of defect identification and classification, the lack of ready-made reference standards for the quantificatio...

Claims

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Application Information

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IPC IPC(8): G01N21/952
Inventor 江涛勾久斌赖茂明刘志刚张波张吉刚康今哲
Owner CHINA BANKNOTE PRINTING & MINTING
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