3D Fixed-Point Printing Calibration for World Coordinate Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional printers achieve high positioning accuracy in their own printing coordinate system but struggle to accurately print in the world coordinate system, leading to positioning errors and inaccuracies, especially in applications like nail decorating where precise alignment is critical.
Innovation Solution
A three-dimensional high-precision fixed-point printing method that integrates a computer vision system and 3D camera to unify the printer, camera, and printing target coordinate systems, allowing for accurate conversion and calibration, including self-check and recalibration mechanisms to ensure precise printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional printers use their own printing coordinate system for positioning, then high positioning accuracy is achieved within the printer system, but positioning accuracy in the world coordinate system deteriorates
Solution Approach 1:
The patent introduces a calibration pattern as an intermediary element that bridges the printer coordinate system and the world coordinate system. The calibration pattern contains known geometric features that can be detected by the camera, enabling the establishment of a transformation relationship between the two coordinate systems. This mediator allows the printer to accurately position in the world coordinate system while maintaining its internal positioning accuracy.
Solution Approach 2:
The patent replaces the traditional mechanical positioning system with a vision-based positioning system. Instead of relying solely on mechanical coordinates, the system uses a 3D camera to capture images of the calibration pattern and calculates the transformation matrix between coordinate systems. This substitution enables accurate positioning in the world coordinate system without compromising the printer's internal mechanical positioning accuracy.
2Measurement precision
If coordinate system transformation is implemented to enable world coordinate system printing, then positioning accuracy in world coordinate system is improved, but system complexity increases
Solution Approach 1:
The patent performs coordinate system calibration in advance by printing a calibration pattern and capturing its image. The transformation matrix between the printer coordinate system and the world coordinate system is calculated and stored beforehand. This preliminary action eliminates the need for real-time complex calculations during actual printing, thereby reducing system complexity while maintaining high positioning accuracy in the world coordinate system.
3Measurement precision
If manual adjustment is used for coordinate calibration, then positioning accuracy can be improved, but operation time and complexity increase
Solution Approach 1:
The patent implements an automated calibration system where the printer automatically prints the calibration pattern, the camera automatically captures the image, and the system automatically calculates the transformation matrix. This self-service approach eliminates manual intervention in the calibration process, reducing both operation time and complexity while maintaining high calibration accuracy. The system performs calibration autonomously without requiring manual adjustments.
Data Source
AI summary
A three-dimensional high-precision fixed-point printing method, including: printing, by a printer, a designated calibration pattern to a printing platform; obtaining, by photographing with a 3D camera, a two-dimensional picture and a 3D point cloud; and obtaining a conversion matrix between a printer coordinate system and a camera coordinate system at least based on the two-dimensional picture and the 3D point cloud, where the conversion matrix is regarded as external parameters of the 3D camera.