Sketch-Driven MBD Dimensions for Accurate 3D Model Annotation
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Solution Overview
Problem
Existing CAD software lacks an efficient method to automatically transfer critical dimensional information from sketches to 3D models for model-based definition (MBD), leading to time-consuming, error-prone manual processes and loss of semantic meaning during file format conversions.
Innovation Solution
A method and system that enable users to select and designate critical sketch dimensional information, mapping it directly to corresponding faces in a 3D model, and automatically incorporate this information for MBD, ensuring a 1:1 mapping and reducing human error.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual processes are used to transfer dimensional information from sketches to 3D models, then flexibility and control over individual dimensions are maintained, but the process becomes time-consuming and error-prone
Solution Approach 1:
The system performs preliminary actions by automatically identifying and designating critical dimensions from the sketch before the MBD annotation process begins. This preliminary designation of critical dimensions enables the subsequent automatic transfer to the 3D model, eliminating the need for manual dimension-by-dimension copying and significantly reducing the time required for the overall process.
2Reliability
If all dimensional information is manually transferred to 3D models, then complete control and verification is possible, but human error increases and reliability decreases
Solution Approach 1:
The system extracts only the critical dimensional information from the sketch that needs to be transferred to the 3D model, rather than manually transferring all dimensions. This extraction of essential dimensions reduces the complexity of the process while maintaining reliability, as the automatic identification and transfer of critical dimensions minimizes human error compared to manual methods.
3Productivity
If sketch dimensions are automatically converted to MBD dimensions, then productivity increases, but loss of semantic meaning during file format conversions may occur
Solution Approach 1:
The system incorporates feedback mechanisms where the automatic dimensioning tool uses the designated critical dimensions from the sketch to intelligently annotate the 3D model with appropriate MBD dimensions. This feedback loop ensures that the semantic meaning of the critical dimensional information is preserved during the conversion process, as the system learns from the sketch's dimensional structure and applies it correctly to the 3D model context.
Data Source
AI summary
A computer-based method is disclosed automatically creating one or more model-based definition (MBD) dimensions for a three-dimensional model based on one or more sketch dimensions. The method includes enabling a user to select dimensional information from a sketch to be designated as critical sketch dimensional information, designating the selected dimensional information from the sketch as critical sketch dimensional information, mapping the critical sketch dimensional information to a related face of a 3D model derived from the sketch, and executing a dimensioning tool to annotate other portions of the 3D model with product manufacturing information (PMI) while automatically incorporating dimensional information based on the critical sketch dimensional information to the related face in the 3D model for MBD.