Stripe Pattern Workpiece Quality Determination
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Solution Overview
Problem
Conventional workpiece quality determination methods rely on reference shape data, which is difficult to match perfectly with actual molded products, leading to inconsistent deformation detection results.
Innovation Solution
A method and system that project a stripe pattern on a workpiece surface, setting observation and projection angles to create a reference stripe pattern from the projected pattern, allowing for deformation detection without requiring reference shape data, by calculating differences in angle and amplitude between the projected and reference patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If reference shape data is used to create a reference stripe pattern, then automated quality determination can be performed, but the determination result does not correlate with actual deformation due to molding variations
Solution Approach 1:
Instead of projecting stripes onto reference shape data and comparing with actual workpiece, the patent inverts the approach by projecting stripes directly onto the actual workpiece surface and creating the reference pattern from the projected pattern itself. This eliminates the mismatch caused by molding variations while maintaining automation.
Solution Approach 2:
The patent creates a reference stripe pattern by copying and processing the actual projected stripe pattern from the workpiece surface. The reference pattern is generated by sliding and averaging multiple projected patterns, creating a representative model that inherently matches the actual workpiece geometry without requiring separate reference shape data.
2Ease of operation
If visual checking by observers is used, then quality determination can be performed, but the determination result varies depending on the observer's experience
Solution Approach 1:
The patent replaces the human visual inspection system with an automated optical measurement system. A stripe projector projects patterns onto the workpiece, a camera captures the deformed patterns, and computer processing automatically analyzes the deformation, eliminating observer-dependent variability entirely.
3Measurement precision
If reference stripe pattern is slid with respect to projected stripe pattern, then difference calculation can be performed, but complex sliding steps are required
Solution Approach 1:
The patent performs preliminary processing by projecting multiple stripe patterns and creating an averaged reference pattern before the final comparison step. This preliminary averaging reduces the need for complex sliding operations during the actual deformation measurement, simplifying the main measurement process while maintaining accuracy.
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
Enables high-accuracy, consistent quality determination of workpiece surfaces from various angles, particularly on narrow curved surfaces, without the need for complex sliding steps, providing stable and versatile results.
Implementation Method 1
a stripe pattern is projected on a workpiece surface
Data Source
AI summary
A workpiece quality determination system for determining the quality of a workpiece based on a stripe pattern projected on a surface of the workpiece includes an observation angle setter that sets an observation angle at which the projected stripe pattern on the workpiece is observed, a stripe projection angle setter that sets the stripe projection angle of the projected stripe pattern at the set observation angle, a reference stripe pattern creator that creates a reference stripe pattern from the projected stripe pattern at the set stripe projection angle, and a quality determinator that calculates a difference between the projected stripe pattern and the reference stripe pattern at the stripe projection angle to determine the quality based on the difference.