Smart Sensor Line Alarm System for Retail Merchandise Monitoring
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Solution Overview
Problem
Conventional line alarm systems face issues with cord management, electrical interference, and aesthetics due to parallel or series routing of cabling, which can lead to system shutdown when maintenance is performed or items are removed for customer examination, and they are limited by the number of input jacks on the central alarm module.
Innovation Solution
A line alarm system that monitors changes in the total resistance of the electrical circuit between security devices and nodes, allowing for 'daisy chaining' of additional display positions without shutting down the system, using a common bus line and series connection to simplify routing and management, and activating an alarm for unauthorized removals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If parallel routing method is used to connect sensors to the central alarm module, then each display position can be independently connected, but the additional cabling required utilizes all available space under the display counter and creates cord management issues
Solution Approach 1:
The patent combines multiple sensor connections into a single shared circuit line, eliminating the need for separate cables from each sensor to the central alarm module. This merging approach reduces cabling complexity while maintaining the ability to monitor multiple display positions.
Solution Approach 2:
The shared circuit line serves multiple functions: it connects multiple sensors, provides power to sensors, and enables communication between sensors and the central alarm module through a single infrastructure, replacing the need for dedicated separate connections.
2Device complexity
If series routing method is used to connect sensors to the alarm module, then cabling is simplified, but when the security device at one display position is disarmed, the security device at each of the other display positions is also disarmed
Solution Approach 1:
The patent segments the monitoring function by allowing individual sensors to be independently armed or disarmed through their own control circuits, while sharing the communication infrastructure. This segmentation prevents the failure or disarming of one sensor from affecting others.
Solution Approach 2:
The system introduces intermediary control circuits at each display position that mediate between the local sensor and the central alarm module, allowing independent control of each sensor while maintaining communication through the shared line.
3Ease of repair
If the entire line alarm system is turned off to perform maintenance or remove merchandise, then maintenance can be performed, but the system is accidentally or intentionally not turned back on
Solution Approach 1:
The patent implements preliminary arming/disarming procedures where sensors can be individually prepared for maintenance or merchandise removal before actually shutting down the system, reducing the need to completely turn off the alarm system.
Solution Approach 2:
The system provides feedback mechanisms that track the status of each sensor and display position, allowing the central alarm module to monitor which sensors are active or inactive, thereby preventing accidental complete system shutdowns and enabling selective maintenance.
4Adaptability or versatility
If daisy chaining is used to add more central alarm modules, then system capacity is increased, but routing cords from display modules to central alarm module ports introduces cord management issues and electrical interference concerns
Solution Approach 1:
The patent merges multiple alarm module connections into a single shared communication line, allowing multiple display positions to be connected through a common infrastructure rather than requiring separate cord connections to each central alarm module.
Solution Approach 2:
The system replaces the mechanical cord-to-port connection system with an electrical field-based communication system where sensors communicate through electromagnetic signals on the shared line, eliminating physical cord management issues and electrical interference from multiple plugged-in cords.
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
Enables efficient monitoring of merchandise presence or absence without shutting down the system, simplifies cabling management, and allows for easy addition of new display positions with reduced risk of accidental system deactivation, while accommodating different power requirements without complex electronics.
Implementation Method 1
monitors a change in a preselected characteristic of a circuit (e.g., a total resistance) defined by the electrical connection between the security devices and the nodes and between the nodes and the alarm unit
Data Source
AI summary
Embodiments of the present invention are directed to systems and methods for monitoring a status of a plurality of a merchandise display devices for displaying items of merchandise at respective display positions. For example, the method includes monitoring for a change in a preselected characteristic of a circuit defined by an electrical connection between the security devices and a plurality of nodes and between the nodes and an alarm unit. The method also includes determining whether an item of merchandise has been added to or removed from a respective display position based on a change in the preselected characteristic.