Vectorial Contour Data Editing for Knitting Pattern Design
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Solution Overview
Problem
Current methods for creating knitting patterns on flat knitting machines limit the ability to seamlessly switch between entering and editing vectorial contour data via tables and graphic functions, and do not allow for independent editing of pattern structure and color in relation to the basic pattern, making it difficult to achieve optimal matching and positioning.
Innovation Solution
A method that allows for graphical and tabular editing of vectorial contour data, where changes in one representation automatically update the other, enabling simultaneous display and editing of knitting data and basic pattern information, with the option to edit vectorial data graphically or via tables, and the ability to position cuts over basic patterns symbolically, while preserving the independence of contour and knitting data changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If vectorial contour data are converted into needle-related data for machine control, then the knitting pattern can be produced on the knitting machine, but the link with the vector data is broken and further graphical editing becomes impossible
Solution Approach 1:
The patent segments the pattern creation process into distinct phases: graphical/vectorial editing phase and machine production phase. The vectorial contour data structure is maintained independently throughout the graphical editing phase, allowing multiple editing operations before final conversion to needle-related control data for machine production. This segmentation resolves the contradiction by enabling both graphical adaptability and manufacturing productivity at appropriate stages.
Solution Approach 2:
The patent performs preliminary graphical editing and design adjustments on the vectorial contour data before converting to needle-related control data. All graphical modifications, pattern adjustments, and design optimizations are completed in advance while the vector data structure is still intact and editable. This preliminary action ensures that when the data is finally converted for machine production, no further editing is needed, thus maintaining both editing versatility during design and production readiness at the end.
2Ease of operation
If the vectorial contour data are edited graphically using handles, then the graphical representation changes, but it is not possible to simultaneously edit the basic pattern structure and color in parallel
Solution Approach 1:
The patent implements a universal editing interface that handles multiple types of data (contour geometry, basic pattern structure, and color information) through a single graphical interface. The handle-based editing mechanism is extended to work not only with contour points but also with pattern elements and color assignments. This multi-functionality allows users to edit different aspects of the knitting design in parallel through the same graphical interface, resolving the contradiction between ease of graphical operation and parallel editing versatility.
Solution Approach 2:
The patent merges the editing of contour data, basic pattern structure, and color information into a unified graphical editing environment. Instead of requiring separate tools and interfaces for each type of data, the system combines all editing functions into one integrated interface where handles can manipulate multiple data types simultaneously. This merging enables parallel editing of all design elements while maintaining a single ease-of-use interface.
3Measurement precision
If the cut is positioned on the basic pattern, then the positioning can be visualized, but the knitting data of the basic pattern cannot be changed independently of the contour data
Solution Approach 1:
The patent implements dynamic, independent control of the basic pattern data and contour data. The basic pattern (including its structure and color information) can be modified independently of the contour definition, and vice versa. The system dynamically updates both representations in real-time, allowing users to adjust the basic pattern to change how the cut is positioned or to modify contour shapes without affecting each other. This dynamic independence resolves the contradiction by enabling both precise positioning visualization and independent adaptability of pattern data.
Solution Approach 2:
The patent introduces the graphical interface and handle-based editing system as an intermediary layer between the contour data and the basic pattern data. This intermediary allows users to position the cut on the basic pattern visually while maintaining separate, independent editability of both data sets. The intermediary coordinates changes between the two representations, ensuring that modifications to one do not automatically alter the other, thus preserving independent adaptability while enabling accurate positioning visualization.
Data Source
Figure 1~2
AI summary
A section of the shaped knit fabric is described by vector contour data loaded in memory of draft unit, and a diagram based on vector contour data of graphical representation (2) of the cut and a diagram based on vector contour data in a table (1) of the section are displayed in parallel on a display device. The contour data is changed graphically using an input tool (4) or is changed over the table. A change in the graphical representation to a corresponding change in the table and vice versa is displayed together with a symbolic representation of basic pattern (3). An independent claim is included for draft device.