Shopping Cart Wheel Locking Using In-Store Signal Sequences
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Solution Overview
Problem
Current shopping container security systems are complex, expensive, and unreliable in busy store environments, often leading to false alarms and inefficiencies due to interference among multiple signal frequencies.
Innovation Solution
A shopping container equipped with a controller that switches between normal and anti-theft modes using a caster mechanism, which selectively locks or unlocks wheels based on specific signal sequences received from strategically placed transmitters at different store zones, eliminating the need for additional entrance and exit loops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple signal frequencies are used in current shopping container security systems, then coverage and detection capability are improved, but false alarms increase and system reliability deteriorates due to interference
Solution Approach 1:
The patent extracts and eliminates the problematic multiple signal frequencies from the system, retaining only a single frequency for communication between transmitters and the shopping container controller. This removal of interfering signals directly reduces false alarms and improves system reliability while maintaining essential detection functionality.
Solution Approach 2:
The patent converts the harmful effect of signal interference into a benefit by using a single frequency system that leverages the simplicity and reliability of unified frequency communication. The absence of frequency interference becomes an advantage, enabling more reliable theft detection without false alarms.
2Reliability
If complex security systems with multiple components are deployed, then theft detection capability is improved, but device complexity and cost increase
Solution Approach 1:
The shopping container controller performs multiple functions: it receives signals from transmitters, determines movement through zones, monitors signal sequences, and controls mobility mechanisms. By consolidating these functions into a single controller, the system achieves comprehensive theft detection capability without proportionally increasing complexity or cost.
Solution Approach 2:
The patent merges the functions of multiple security components into an integrated system where transmitters, controllers, and mobility control mechanisms work together through a unified single-frequency communication protocol. This consolidation reduces overall system complexity while maintaining robust theft detection capability.
3Reliability
If traditional security systems with entrance and exit loops are used, then theft prevention is achieved, but system cost and installation complexity increase
Solution Approach 1:
The patent extracts and removes the need for separate entrance and exit loops from the security system. Instead, the shopping container controller itself detects movement through zones by receiving signals from strategically placed transmitters, eliminating the complexity of installing and maintaining traditional loop systems while maintaining effective theft prevention.
4Reliability
If shopping containers are restrained to prevent theft, then security is improved, but customer convenience and shopping speed deteriorate
Solution Approach 1:
The mobility control mechanism dynamically adjusts the shopping container's mobility based on real-time signal sequence analysis. The container remains freely movable during normal shopping activities but automatically locks when theft is detected, providing both customer convenience and security without compromise.
Solution Approach 2:
The system continuously monitors the sequence of signals received by the controller and provides feedback to the mobility control mechanism. This feedback loop enables the system to distinguish between legitimate shopping trips and theft attempts, restraining the container only when necessary while maintaining ease of operation during normal use.
Data Source
AI summary
Disclosed herein are computer-implemented methods and systems to facilitate prevention or detection of theft of an item in a shopping container. A controller attached to the shopping container receives a first signal from a first transmitter upon entry of the shopping container into a first area within a store. A second signal is received by the controller from a second transmitter upon entry of the shopping container into a second area within the store. After receiving the second signal, the controller receives the first signal again without having received a third signal associated with a third area within the store. In response to receiving the first signal again without having received the third signal after receipt of the second signal, the controller automatically causes switching from a normal mode to an anti-theft mode associated with the controller.