Suction Nozzle Flange Inspection via Image Processing
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Solution Overview
Problem
The contrast between components and the flange portion of a suction nozzle is reduced due to scratches on the flange, which can hinder image recognition during inspection, as the lighting reflected from scratches enters the camera's field of view.
Innovation Solution
A device comprising an imaging system and a control unit that inspects the suction nozzle's flange portion by acquiring images and determining its quality through image processing, excluding regions where the flange is not visible to improve image recognition of components held by the nozzle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If black plating treatment is performed on the flange portion to prevent light reflection, then the background contrast is improved, but scratches on the flange portion still reflect lighting light and reduce image contrast
Solution Approach 1:
The patent applies preliminary action by performing black plating treatment on the flange portion before inspection to reduce light reflection. However, it recognizes that scratches can still reflect light and reduce image contrast, leading to the development of image processing techniques to compensate for this effect and improve overall image recognition accuracy.
2Illumination intensity
If lighting is directed from the part camera side to illuminate the component, then image brightness is improved, but light reflected from scratch portions enters the field of view and reduces contrast
Solution Approach 1:
The patent applies local quality by differentiating the treatment and inspection approach for different regions: the flange portion receives black plating treatment to minimize reflection, while the component area receives direct lighting for brightness. The image processing then selectively analyzes these regions with different quality characteristics to optimize overall inspection accuracy.
3Reliability
If the flange portion is inspected to determine quality, then nozzle defect detection is improved, but image recognition of held components may be influenced by flange scratches
Solution Approach 1:
The patent applies segmentation by dividing the inspection process into distinct stages: first inspecting the flange portion for scratches and defects, then separately inspecting the held component. The image processing system processes flange images and component images differently, allowing reliable flange quality determination while maintaining accurate component recognition despite potential flange defects.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device effectively determines the quality of the suction nozzle's flange portion, ensuring improved image recognition and proper component handling by distinguishing between normal and defective flange states.
Implementation Method 1
when the lighting light reflected from the scratch portion enters a field of view of the part camera
Data Source
AI summary
A device for inspecting a suction nozzle includes an imaging device configured to acquire an image by imaging a flange portion of a suction nozzle having a body cylinder and the flange portion protruding from an outer surface of the body cylinder, and a control device configured to execute an inspection process for determining whether the flange portion is defective based on the image.