3D CAD Multi-Locator Assembly Precision
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Solution Overview
Problem
Current three-dimensional Computer-Aided Design (CAD) software face precision issues when handling objects of vastly different design dimensions, leading to degraded modeling precision and limitations in designing assemblies with large and small elements, as they must round real numbers, resulting in loss of accuracy and the need to change software for data export.
Innovation Solution
A computer-implemented method that uses multiple locators or reference frames with different design dimensions ranges, allowing objects to be positioned and oriented relative to each other, enabling precise assembly design by selecting from predefined lists and adapting the dimensions range to fit the largest object, ensuring accurate representation across all dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard three-dimensional CAD software uses a single design dimensions range, then hardware architecture constraints are respected, but precision is degraded when handling objects of vastly different dimensions
Solution Approach 1:
The invention segments the design space into multiple design dimensions ranges, each with its own locator. This allows objects of different size scales (e.g., a 10,000 km road and a car with components) to be modeled with appropriate precision for each scale without degrading overall modeling precision, resolving the contradiction between measurement precision and adaptability to mixed dimensions.
Solution Approach 2:
The invention implements a nested structure where locators of different design dimensions ranges are nested within each other. A first locator with a first design dimensions range contains second locators with second design dimensions ranges, allowing hierarchical organization of objects at different scales while maintaining precision at each level.
2Ease of operation
If scale factor is used to fit large dimension objects into normal dimension objects, then objects can be displayed together, but the issue of mixing objects with different precision requirements remains
Solution Approach 1:
The invention adds a dimensional aspect by introducing multiple design dimensions ranges as a new dimension in the design space. Instead of using scale factors to compress large objects, the system allows objects to coexist in their native dimensions while being organized through nested locators, preserving manufacturing precision for each object type.
3Length of stationary object
If civil engineering software assumes high dimension objects, then large scale design is enabled, but very small and precise mechanical assemblies cannot be designed
Solution Approach 1:
The invention makes the design dimensions range dynamic and adaptable rather than fixed. The software can switch between and combine different design dimensions ranges (from kilometer-scale civil engineering to millimeter-scale mechanical assemblies) within the same project, allowing the precision and scale to be dynamically adjusted to match the specific objects being designed.
Data Source
AI summary
A computer-implemented method for designing an assembly of objects in a three-dimensional scene of a system of computer-aided design, comprising the steps of: providing (SI), in the scene, a first locator (LOCI) associated with a first design dimensions range; and providing (S2), in the scene, at least one second locator (LOC2a, LOC2b) respectively associated with a second design dimensions range, the first design dimensions range having an upper bound greater than the upper bound of the second design dimensions range.