Multi-Camera Optical Inspection for Surface Defect Detection
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Solution Overview
Problem
In industrial production, existing defect checking technologies are inadequate for efficiently identifying defects such as abnormal colors, stair slope errors, scratches, and sanding marks on the surfaces of electronic products, which can lead to damage and quality issues.
Innovation Solution
An electronic device equipped with multiple camera systems and light sources, arranged on an operation table with a robot arm, captures and analyzes images of product surfaces using preset distances and angles to detect defects, employing neural network algorithms for defect recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple camera systems and light sources are used to improve defect detection capability, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The checking device is divided into multiple independent camera systems (first camera system, second camera system) and light source groups, each responsible for specific viewing angles and defect types. This segmentation allows the system to achieve comprehensive defect detection through coordinated operation of specialized subsystems, resolving the contradiction between detection precision and device complexity.
Solution Approach 2:
The patent introduces multi-dimensional inspection by arranging camera systems at different spatial positions and angles (front, side, angled views) to capture product defects from multiple perspectives. This dimensional approach enables comprehensive defect detection that cannot be achieved from a single viewpoint, improving measurement precision while maintaining manageable device complexity through systematic spatial arrangement.
2Adaptability or versatility
If multiple camera systems with different angles are deployed to detect various defects, then adaptability is improved, but device complexity increases
Solution Approach 1:
Each camera system is designed with multi-functionality to detect multiple types of defects (scratches, dents, discoloration, sanding marks) from its specific viewing angle. The first camera system detects front surface defects, the second camera system detects side surface defects, and both systems work together to provide comprehensive defect coverage, achieving high adaptability without requiring separate specialized devices for each defect type.
3Measurement precision
If images are captured at preset distances and angles to improve detection accuracy, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The camera systems and light sources are pre-configured at preset distances and angles during device assembly, establishing optimal imaging conditions before actual defect detection begins. This preliminary configuration ensures consistent and accurate image capture without requiring complex real-time adjustments during operation, thereby improving measurement precision while simplifying ease of operation during actual use.
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
Effectively identifies and distinguishes various defects on plane and side surfaces of electronic products, enabling precise quality control and ensuring product integrity by capturing and analyzing images with high accuracy.
Implementation Method 1
a first camera device (11) arranged on a first camera bracket (12), a second camera device (13) arranged on a second camera bracket (14)
Data Source
AI summary
An electronic device for optically checking an appearance of a product for defects includes a first checking device checking a plane of a product and a second checking device checking side surfaces of the product. The first checking device includes a first camera device, a second camera device, and first white and red light sources. The second checking device includes a third camera device, at least one second white light source, and at least one second red light source. When the first white light source or the first red light source are activated, the first and second camera device capture at least one image of a plane. When the second white light source or the second red light source are activated, the third camera device captures at least one image of a side surface.