Absolute Positioning Pattern Using Segmented Unit Cells
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Solution Overview
Problem
Conventional absolute positioning systems face challenges with precision due to complex and small symbols, leading to erroneous positioning when the sensing means has insufficient resolution, and redundant microcodes degrade the accuracy of position sensing.
Innovation Solution
A product with an absolute positioning pattern featuring first cells displaying coded binary data and second cells with distinct coding, forming unit cell patterns that indicate absolute coordinates, allowing for error correction and differentiation from adjacent patterns, using line segments with varying angles and lengths to represent data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If complex and small symbols are used for absolute positioning patterns, then the positioning density increases, but the sensing precision deteriorates when the sensing means has insufficient resolution
Solution Approach 1:
The positioning pattern is divided into multiple unit cells, each containing multiple sub-cells that represent individual binary digits. This segmentation allows the pattern to be read incrementally, with each unit cell contributing a portion of the overall coordinate information, thereby maintaining precision even when individual cells are large and easily resolvable by the sensing means.
Solution Approach 2:
The patent transitions from representing coordinates directly to representing binary digit sequences that encode coordinates. By adding the dimension of binary encoding across multiple sub-cells within unit cells, the system can represent complex positioning information using simple, large, easily-sensible symbols, resolving the contradiction between pattern density and sensing precision.
2Measurement precision
If simple and large symbols are used for absolute positioning patterns, then the sensing precision improves, but the positioning density decreases
Solution Approach 1:
Each unit cell is divided into multiple sub-cells, where each sub-cell represents a binary digit (0 or 1). This segmentation allows the encoding of multiple bits of coordinate information within a single unit cell structure, increasing the information density without requiring smaller physical symbols, thus maintaining both simplicity and positioning density.
Solution Approach 2:
Multiple binary digit representations are merged into a single unit cell structure. The combination of multiple sub-cells within one unit cell allows the system to convey complex coordinate information through a unified, easily-sensible pattern, achieving high positioning density without sacrificing symbol simplicity or sensing precision.
3Measurement precision
If redundant microcodes are added to differentiate adjacent patterns, then the pattern recognition accuracy improves, but the operational complexity increases
Solution Approach 1:
Differentiation between adjacent unit cells is achieved through local variations in specific sub-cells rather than complex overall patterns. By modifying individual sub-cells within unit cells to represent binary digits, the system creates simple, localized differences that are easily detectable without requiring complex global pattern recognition, thus reducing operational complexity while maintaining recognition accuracy.
Solution Approach 2:
The patent uses parameter changes in the binary digit representation (presence or absence of lines in sub-cells) to differentiate adjacent unit cells. This approach replaces complex microcode structures with simple binary parameter variations, achieving accurate pattern recognition through minimal, easily-detectable changes that reduce system complexity.
Data Source
AI summary
Disclosed is a product having an absolute positioning pattern on its surface and a method for forming the absolute pattern. The product includes first cells displaying coded binary data or displaying coded data expressed in terms of at least three digits; second cells displaying data coded in a manner different from the first cells or having no data; and a unit cell pattern formed by a group of at least a predetermined number of the first and second cells. The combination of data corresponding to the first cells within the unit cell pattern indicates an absolute coordinate of the corresponding unit cell pattern, and the unit cell pattern is differentiated from other adjacent unit cell patterns by the second cells within the unit cell pattern. The disclosed product and method require a smaller amount of operation to calculate the coordinate value compared with the prior art, but can display a broader position.