Method and system for detecting and screening end defects in circular parts

A technology of ring-shaped parts and screening method, applied in the field of image processing, can solve the problems of low efficiency, poor stability and reliability, and high missed detection rate, and achieve the effects of solving detection difficulties, broad application prospects and high detection efficiency

Active Publication Date: 2014-01-08
FUZHOU UNIVERSITY
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Problems solved by technology

At present, the surface defect detection of such parts mainly relies on human visual inspection. Due to the influence of the inspector's technology, experience, working environment and visual fatigue, it is easy to have false detection and missed detection, and the efficiency of manual visual inspection is low and lacks accuracy. And

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  • Method and system for detecting and screening end defects in circular parts
  • Method and system for detecting and screening end defects in circular parts
  • Method and system for detecting and screening end defects in circular parts

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Embodiment Construction

[0046] The invention provides a method for detection and screening of end face defects of ring parts, comprising the following steps:

[0047] (1) Shooting the ring part to be inspected by an optical magnifying device to obtain an optically enlarged image of the end face of the ring part to be inspected;

[0048](2) Reading the optically magnified image through a control computer, performing image processing and defect recognition on the optically magnified image, including image filtering, threshold iteration, image binarization, morphological operations, image segmentation, defect recognition, etc. , and then determine whether the ring part is qualified according to the defect situation, and send the determination result to the communication port of the control computer in the form of an order;

[0049] (3) Receive commands from the communication port of the control computer through a controller. If the ring part is unqualified, the controller controls the air pressure nozzl...

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Abstract

The invention relates to a method and a system for detecting and screening end defects in circular parts. The system comprises an optical amplifier, a control computer, a controller, a pneumatic nozzle device, a step motor and a conveyor belt. The method includes the steps of 1, photographing a circular part to be detected by the optical amplifier to obtain an optically amplifier image of the end of the circular part to be detected; 2, subjecting the optically amplified image to image processing and defect recognition by the control computer, and judging whether the circular part is qualified or not according to defect conditions; 3, allowing the controller to receive a command of controlling the computer, control the pneumatic nozzle device to operate, remove unqualified parts, and control the conveyor belt to convey next part to a detection position. The method and the system have the advantages that end defects in circular parts can be reflected truly, whether an object is qualified or not can be judged accurately, automation level is high, and detection efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and system for detecting and screening end face defects of small-sized ring parts. Background technique [0002] For small-sized ring parts with an outer ring diameter less than 5 mm, in order to ensure product quality, micro-defects (such as micro-cracks and micro-damages) on the end faces must be inspected. At present, the surface defect detection of such parts mainly relies on human visual inspection. Due to the influence of the inspector's technology, experience, working environment and visual fatigue, it is easy to have false detection and missed detection, and the efficiency of manual visual inspection is low and lacks accuracy. And normalization, stability and reliability are relatively poor. In order to solve the problems of high difficulty, low efficiency and high missed detection rate of manual visual inspection, it is necessary to introduce an automa...

Claims

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Application Information

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IPC IPC(8): G01N21/95
Inventor 何炳蔚林建楠
Owner FUZHOU UNIVERSITY
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