EAS System Using Time of Flight Sensors to Reduce False Alarms
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Solution Overview
Problem
Electronic Article Surveillance (EAS) systems often generate false alarms when customers inadvertently trigger sensors near exits, leading to unnecessary alarms and potential delays in detecting shoplifting, as existing solutions require positioning surveillance areas close to or outside exits to minimize false triggers.
Innovation Solution
An EAS system that combines a tag sensor with a motion sensor to track speed, distance, and directionality, allowing for accurate detection of theft events by determining the intent of individuals based on their movement patterns, thereby reducing false alarms and enabling timely detection of shoplifting attempts without needing to position surveillance areas close to exits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surveillance area is positioned close to the exit to reduce false alarms, then false alarm rate is reduced, but response time for detecting shoplifting is delayed
Solution Approach 1:
The surveillance area is divided into multiple zones: a first surveilled area positioned close to the exit for detecting tags with reduced false alarms, and a second surveilled area positioned farther from the exit for early detection of shoplifting. This segmentation allows the system to optimize each zone's function - the first zone minimizes false alarms while the second zone enables early intervention, resolving the contradiction between reliability and response time.
2Reliability
If the surveillance area is positioned close to the exit to minimize false triggers, then false alarm rate is reduced, but detection capability for shoplifting is weakened
Solution Approach 1:
The system segments surveillance into two areas: the first surveilled area close to the exit provides reliable tag detection with minimized false triggers, while the second surveilled area farther from the exit maintains strong detection capability for shoplifting attempts. The segmentation allows each zone to be optimized for its specific function, resolving the contradiction between reliability and detection capability.
Solution Approach 2:
The system adds the dimension of spatial distribution by implementing multiple surveilled areas at different distances from the exit. Instead of relying on a single surveillance position, the system uses a first surveilled area close to the exit and a second surveilled area farther away, creating a multi-dimensional surveillance approach that simultaneously achieves reduced false alarms and maintained detection capability.
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 effectively reduces false alarms, enhances security by detecting potential shoplifting threats before they exit the store, and improves the overall shopping experience by minimizing unnecessary alarms for customers and staff.
Implementation Method 1
a motion sensor for tracking speed, distance and directionality of people passing through the surveilled area
Data Source
AI summary
An electronic article surveillance (EAS) system and method of operating the system, including one or more processors and memory. The memory contains instructions to cause the processors to receive data from a first sensor indicating the presence of an electronic surveillance tag within a first predetermined space, receive data from a second sensor including tracking information that indicates a distance of the second sensor from a person in possession of the electronic surveillance tag within a second predetermined space, determine a speed and/or direction of movement of the person based on the data from the second sensor, and detect a theft event and execute an alarm routine based on the presence of the electronic surveillance tag within the first predetermined space and the speed and/or direction of movement of the person within the second predetermined space.