GPS Caster Locking Mechanism for Shopping Cart Perimeter Security
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Solution Overview
Problem
Shopping carts lack a secure mechanism to prevent unauthorized movement outside a designated operating perimeter, leading to potential theft or misuse.
Innovation Solution
A GPS-enabled locking mechanism integrated into a caster of the shopping cart that determines its GPS coordinates and disables rotation when outside a predefined operating perimeter, using a control circuit with a logic module, GPS module, illumination device, and power circuit to inhibit wheel rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a GPS-enabled locking mechanism is integrated into the shopping cart, then security against unauthorized movement is improved, but device complexity increases
Solution Approach 1:
The patent replaces traditional mechanical locking mechanisms with an electronic/GPS-based system. The control circuit uses GPS coordinates to determine location and electronically controls the locking mechanism, substituting mechanical positioners with an electronic control system that communicates via GPS signals to achieve perimeter-based security.
Solution Approach 2:
The shopping cart system integrates multiple functions into a single device: GPS reception, coordinate determination, perimeter comparison logic, and locking mechanism control. This multi-functional integration improves security while managing complexity by combining what would otherwise be separate systems into one unified cart control unit.
2Reliability
If a control circuit with GPS module and logic module is added to monitor operating perimeter, then security is enhanced, but device complexity increases
Solution Approach 1:
The patent merges the GPS module, logic module for coordinate comparison, and locking mechanism control into a single integrated control circuit. This consolidation combines multiple functional components into one unified system, reducing the number of separate devices needed while maintaining comprehensive security functionality.
3Reliability
If the wheeled structure is disabled when outside operating perimeter, then theft prevention is improved, but ease of operation decreases
Solution Approach 1:
The shopping cart system performs self-monitoring and self-locking based on GPS location data. The control circuit automatically compares current coordinates with the stored perimeter coordinates and autonomously activates the locking mechanism when a boundary violation is detected, without requiring user intervention or external surveillance.
Data Source
AI summary
The shopping cart security system is configured for use with a hand propelled vehicle known as a shopping cart. The shopping cart security system is a wheeled structure that allows the hand propelled vehicle to roll over a supporting surface. The shopping cart security system: a) determines the GPS coordinates of the shopping cart security system; b) compares the GPS coordinates of the shopping cart security system with a previously determined set of GPS coordinates that determine an operating perimeter for the shopping cart security system; and, c) disables the rotation of the wheeled structure that forms the shopping cart security system when the shopping cart security system is determined to be outside of the region bounded by the previously determined operating perimeter.