Self-checkout system with scan gate and exception handling
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Solution Overview
Problem
Existing self-checkout systems face issues with inaccurate weighing due to items extending beyond the scale perimeter, limited viewing angles for barcode scanning, and lack of exception handling, leading to revenue loss and customer confusion.
Innovation Solution
A self-checkout system with a multi-plane weigh platter and 360-degree data reader system comprising side, bottom, and top data reader systems, along with a touch screen and security camera for accurate weighing and scanning, and exception handling to resolve errors without requiring rescanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single-plane weigh platter is used, then the device complexity is reduced, but measurement precision deteriorates because items extending beyond the perimeter result in inaccurate weighing
Solution Approach 1:
The weigh platter is divided into multiple planes (first plane and second plane) at different heights, allowing items to be weighed on the appropriate plane based on their size and shape. This segmentation enables accurate weighing of items that would otherwise extend beyond a single-plane perimeter, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The scale transitions from a two-dimensional single-plane surface to a three-dimensional multi-plane structure with vertical separation. This dimensional change allows items of various sizes to be positioned on different elevation levels, ensuring all items can be fully contained on the weigh surface for accurate measurement without requiring an excessively large horizontal perimeter.
2Adaptability or versatility
If a bi-optic scanner arrangement is used, then the device complexity is reduced, but the viewing angles for capturing barcodes are limited
Solution Approach 1:
The scanning system is segmented into multiple independent data reader systems positioned at different locations and orientations. Each data reader handles a specific viewing zone, collectively providing comprehensive 360-degree barcode scanning coverage while maintaining manageable individual component complexity.
Solution Approach 2:
The scanning system expands from a two-dimensional bi-optic arrangement to a three-dimensional multi-plane configuration with data readers positioned above, below, and at sides of the weigh platter. This spatial distribution enables scanning of barcodes on items regardless of their orientation or position, significantly enhancing adaptability without excessive complexity.
3Reliability
If separate scanning and loss prevention scales are used, then measurement precision for each function is improved, but the device complexity and space requirements increase
Solution Approach 1:
The scanning system and loss prevention scale are merged into a single integrated system. The multi-plane weigh platter serves dual purposes: accurate weighing of items and detection of potential theft through weight verification. This consolidation maintains the reliability of loss prevention while reducing overall system complexity and space requirements compared to separate systems.
Solution Approach 2:
The weigh platter and data reader systems are designed to perform multiple functions simultaneously: barcode scanning, weight measurement, and loss prevention monitoring. This multi-functionality ensures that a single system can accurately perform scanning and loss prevention tasks that would otherwise require separate dedicated devices, reducing complexity while maintaining reliability.
4Productivity
If no exception handling is provided, then the device complexity is reduced, but productivity deteriorates due to required rescanning of items
Solution Approach 1:
The system incorporates exception handling mechanisms that provide immediate feedback to customers when scanning or weighing errors occur. The system identifies and communicates specific issues (such as items not properly scanned or weighed) and guides customers through corrective actions, eliminating the need for complete rescanning and significantly improving checkout productivity while adding manageable system complexity.
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 ensures accurate weighing and scanning with 360-degree coverage, reduces errors, and simplifies the checkout process by alerting customers to exceptions and allowing them to resolve issues directly, thereby enhancing loss prevention and customer experience.
Implementation Method 1
The scale apparatus typically has a load cell and a weigh platter which rests on a load cell or cells.
Data Source
AI summary
The disclosure relates to a self-checkout system including a base and a scan gate extending over at least a portion of the base, the scan gate having a field of view that encompasses 360-degree coverage of the items such that the scan gate is able to obtain and read encoded data on any surface of the item passing through the scan gate. The base may include one or more rails positioned along the periphery to help retain items on the surface of the base once they have been passed through the scan gate.