Stacked Controller Position Detection for Load Cell Pairing
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Solution Overview
Problem
Checkout terminals with multiple controllers can become inaccurate or inoperable when the load cells are coupled with the wrong controller during assembly, leading to incorrect weight measurements for price-by-weight items.
Innovation Solution
A stacked unit detection system that uses magnetic coupling and detection features to identify the position of controllers within a vertical stack, ensuring they are correctly configured with the appropriate set of load cells, even if assembled out of order.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple controllers are stacked vertically in the checkout terminal, then the system can handle multiple load cell sets, but the controllers may be coupled with the wrong load cells during assembly, leading to measurement errors
Solution Approach 1:
The patent applies preliminary action by implementing a detection sequence that is executed before the checkout terminal begins normal operation. The system performs stacked unit detection to identify controller positions and automatically configures the controllers with the correct load cell sets before any weighing operations occur. This pre-configuration step prevents mismatching errors that would otherwise occur during assembly, ensuring that each controller is properly paired with its corresponding load cells before the system is put into service.
2Productivity
If controllers are assembled in arbitrary order, then assembly time is reduced, but the controllers cannot be correctly configured without knowing their positions in the vertical stack
Solution Approach 1:
The patent implements self-service through an automatic detection and configuration system. During the detection sequence, the system automatically identifies the vertical position of each controller in the stack using magnetic coupling detection between stacked units. Based on this detected position information, the system automatically configures each controller with the appropriate load cell set without requiring manual intervention or pre-knowledge of controller positions. This self-configuration capability allows controllers to be assembled in any order while ensuring correct setup, thereby maintaining high assembly productivity without increasing operational complexity.
Solution Approach 2:
The system employs feedback mechanisms by detecting the magnetic coupling signals between stacked controllers to determine their vertical positions. The detection sequence monitors the magnetic field interactions and uses this feedback information to automatically identify which controller is in which position (top, middle, bottom). This feedback loop enables the system to adapt its configuration automatically based on the actual physical arrangement of controllers, ensuring correct pairing with load cells regardless of assembly order, thus simplifying the overall configuration process.
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
Ensures accurate configuration of controllers with the correct load cells, maintaining the integrity of weight measurements and operational functionality of the checkout terminal.
Implementation Method 1
based on the magnetic coupling of a magnet of one control box with a magnetic switch of a neighboring control box, a controller of a control box can determine a position of its associated control box within the vertical stack
Data Source
AI summary
Systems and methods of implementing a detection sequence for determining positions of control boxes within a stack are provided. In one aspect, a system includes control boxes each including a controller having a plurality of ports, a magnetic switch, and a magnet. The control boxes are arranged in a stack so that, for each adjacent pair of control boxes, the magnetic switch of one control box is magnetically coupled with the magnet of another control box. The controller of each control box is configured to determine a position, within the stack, of its associated control box based at least in part on the magnetic coupling, or lack of magnetic coupling, between the magnetic switch of its associated control box and the magnet of another control box within the stack.