3D Model Generation Using Plane Element Selection and Sweep Operations
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Solution Overview
Problem
Conventional three-dimensional model generating methods in CAD systems face challenges in accurately generating models due to measurement errors and conversion issues, leading to offset connections and deviations from the actual object shape, requiring significant correction efforts.
Innovation Solution
A method that utilizes a calculator to select appropriate plane elements from measurement data, generate three-dimensional model elements, and combine them to create a three-dimensional model, allowing for the representation of shapes through sweep and slicing operations, with automatic generation and correction of model elements to achieve desired shapes and dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional automatic three-dimensional model generation methods are used, then model generation speed is improved, but manufacturing precision deteriorates due to measurement errors and conversion errors causing offset connections and shape deviations
Solution Approach 1:
The patent segments the three-dimensional model generation process into multiple stages: creating individual plane elements from measurement data, connecting them through boundary line processing, and performing closing processes. This segmentation allows each stage to be optimized independently, particularly enabling manual or automated boundary line closing to correct measurement errors before final model generation, thus maintaining both speed and precision.
Solution Approach 2:
The patent implements feedback mechanisms where the system detects offset connections and shape deviations during the model generation process, then automatically or manually adjusts boundary lines and plane element connections. This feedback loop allows correction of measurement errors and conversion errors, ensuring the final model achieves desired dimensional accuracy while maintaining efficient automated generation.
2Manufacturing precision
If manual boundary line closing processes are performed to improve manufacturing precision, then model dimensional accuracy is improved, but productivity deteriorates due to significant correction work time requirements
Solution Approach 1:
The patent provides dynamic flexibility by allowing users to switch between manual boundary line closing processes and automated closing processes based on the specific requirements of each model. The system can adaptively select the appropriate method, combining manual precision correction where needed with automated efficiency in other areas, thus balancing productivity and manufacturing precision.
Solution Approach 2:
The patent implements self-service capabilities where the system automatically performs boundary line closing and model correction processes without requiring manual intervention. The automated closing process detects and corrects offset connections and shape deviations independently, eliminating time-consuming manual correction work while maintaining high dimensional accuracy, thus resolving the contradiction between precision and productivity.
3Productivity
If automated plane element connection processes are used, then productivity is improved, but manufacturing precision deteriorates due to inability to properly handle offset connections from measurement errors
Solution Approach 1:
The patent performs preliminary actions by pre-processing measurement data to identify and mark potential offset connections and boundary line issues before the main model generation process. This preliminary detection allows the automated connection process to anticipate and properly handle measurement errors, maintaining both high productivity through automation and manufacturing precision by pre-correcting potential problems.
Data Source
AI summary
In a three-dimensional model generating method, a predetermined plane element defining a three-dimensional model element is selected from measurement data, which includes measurement point group data obtained by measuring a measured object, a type of a plane element, and geometric values of the plane element; a condition required for generating the three-dimensional model element is obtained; the three-dimensional model element is generated using the selected plane element and the obtained condition; and the three-dimensional model of the measured object is generated using one or a plurality of three-dimensional model elements.


