Planar Load Cell Assemblies for Retail Shelving Weight Tracking
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Solution Overview
Problem
Existing solutions for autonomous retail and inventory management using load cells are inadequate in stabilizing and integrating with existing shelving systems, particularly in large-scale retail environments, and lack the accuracy and compactness required for effective weight tracking.
Innovation Solution
A shelving unit system incorporating planar load cell assemblies with specific designs, including multiple cutout windows, flexure arrangements, and strain gauges, attached to shelf brackets and uprights, which communicate weight changes to a computing device for inventory management and retail transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If load cells are attached to the underside of shelf segments, then weight tracking capability is achieved, but the shelves lack immobilization and stabilization
Solution Approach 1:
The patent combines the load cell assembly with the shelf bracket into an integrated unit. The load cell is mounted within the bracket structure itself, merging the weighing function with the support function. This integration ensures that the shelf is both supported and stabilized by the same structural element, eliminating the need for separate attachment mechanisms.
Solution Approach 2:
The shelf bracket acts as an intermediary element between the shelf and the upright. It provides a stable mounting point for the load cell while maintaining the structural integrity of the shelving system. The bracket transfers both the mechanical load and the measurement function from the shelf to the upright in a stabilized manner.
2Adaptability or versatility
If intelligent shelving is integrated with existing gondola shelving units, then adaptability is improved, but device complexity increases
Solution Approach 1:
The shelf bracket is designed as a universal component that serves multiple functions: structural support, shelf attachment, load cell mounting, and stabilization. This multi-functionality allows the same component to be used across different shelving configurations and locations, simplifying integration with existing gondola units while reducing the number of separate parts needed.
Solution Approach 2:
The intelligent shelving system is divided into modular segments where each bracket-load cell assembly can be independently installed and configured. This segmentation allows for gradual integration with existing shelving systems, enabling retailers to implement weighing functionality in specific sections without overhauling the entire shelving infrastructure.
3Measurement precision
If very accurate and small-size load cell assemblies are introduced, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The load cell is merged with the shelf bracket structure, eliminating the need for separate mounting hardware and complex assembly procedures. The load cell becomes an integral part of the bracket, reducing the number of components while maintaining high measurement precision through careful design of the integrated structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides accurate and stable weight tracking, enabling efficient inventory management and autonomous retail transactions by immobilizing shelves and integrating seamlessly with existing shelving systems, even in large-scale environments.
Implementation Method 1
at least one strain gage, fixedly attached to a surface of a measuring beam of said measuring beams
Data Source
Figure 1~2
Figure 3A~3C
Figure 4A~4B
AI summary
A weighing assembly having first and second shelf brackets supporting first and second planar load cell assemblies, each planar load cell assembly having at least one load cell arrangement disposed on a metal load cell body, each load cell arrangement including first and second contiguous cutout windows passing through the load cell body, a pair of measuring beams disposed along opposite edges of the load cell body, a first flexure arrangement having a first pair of flexure beams, a loading element comprising a receiving element and extending from an innermost flexure base, and at least one strain gage, fixedly attached to a surface of the measuring beam.