3D Shoe Part Modeling Using Laser Scanning for Automated Manufacturing
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Solution Overview
Problem
Manual methods for manufacturing shoe parts are resource-intensive and prone to high variability, making them inefficient and inconsistent.
Innovation Solution
An automated system that uses laser projection and camera imaging to generate 3D models of shoe parts, allowing for the conversion of dimension data into coordinate systems recognizable by manufacturing tools, thereby enabling automated manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automated systems are introduced to improve manufacturing efficiency, then productivity increases, but device complexity increases
Solution Approach 1:
The system is divided into distinct functional modules: a laser projection module that projects structured light patterns onto the shoe part, a camera module that captures images of the projected patterns, a moving apparatus that positions the shoe part, and a computing device that processes images to generate 3D models. Each module can be independently controlled and optimized, allowing automated manufacturing without requiring a monolithic complex system.
Solution Approach 2:
The system transitions from 2D camera images to 3D geometric models by projecting structured light patterns onto the shoe part surface. The laser projects lines or grids that deform according to the surface topology, and the camera captures these deformations. Through coordinate transformation and triangulation calculations, the system reconstructs three-dimensional surface geometry from two-dimensional image data, enabling accurate 3D modeling without complex mechanical scanning.
2Manufacturing precision
If 3D modeling accuracy is improved for precise manufacturing, then manufacturing precision increases, but measurement and detection difficulty increases
Solution Approach 1:
The system uses a laser that projects visible light patterns (appearing as colored lines or grids) onto the shoe part surface. The camera captures images where the position and deformation of these light patterns encode surface geometry information. By tracking the displacement and distortion of the projected patterns across multiple images taken from different angles, the system accurately reconstructs 3D surface topology without requiring direct physical contact or complex tactile sensors.
Solution Approach 2:
The system creates a digital 3D copy of the physical shoe part by projecting structured light patterns and capturing their deformation on the surface. The computed geometric model serves as an accurate digital replica that can be used for manufacturing planning, simulation, and quality control. This optical copying approach avoids the complexity of direct physical measurement while achieving high measurement precision through mathematical reconstruction.
3Measurement precision
If multiple lasers and cameras are used to scan difficult surfaces, then measurement completeness improves, but device complexity increases
Solution Approach 1:
The system employs a moving apparatus that dynamically positions the shoe part through a range of positions including forward/backward movement and 360-degree rotation. This dynamic positioning allows a single laser-camera assembly to capture images of the entire shoe part surface from multiple angles. The moving apparatus coordinates the object's position with the projection and capture timing, enabling complete surface scanning without requiring multiple fixed laser-camera stations, thus reducing system complexity while maintaining measurement completeness.
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
This approach reduces variability and increases efficiency in shoe part manufacturing by accurately modeling and processing shoe parts, facilitating automated processes such as cutting, adhesive application, and assembly.
Implementation Method 1
a laser beam may be projected onto a shoe-part surface, such that a projected laser line appears on the surface and follows a surface contour creating a cross-section of the shoe-part surface
Implementation Method 2
a camera that records multiple images of the projected laser line, each image depicting a representation of the projected laser line extending across the section
Data Source
AI summary
Manufacturing of a shoe is enhanced by creating 3-D models of shoe parts. For example, a laser beam may be projected onto a shoe-part surface, such that a projected laser line appears on the shoe part. An image of the projected laser line may be analyzed to determine coordinate information, which may be converted into geometric coordinate values usable to create a 3-D model of the shoe part. Once a 3-D model is known and is converted to a coordinate system recognized by shoe-manufacturing tools, certain manufacturing steps may be automated.