Wireless Antitheft Device for Retail Items
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Solution Overview
Problem
Conventional antitheft systems for retail items require complex wiring of cable-type sensors, leading to disordered retail shelves and increased need for child devices when monitoring multiple items, making installation cumbersome and aesthetically unappealing.
Innovation Solution
An antitheft device with a movement detector, such as an acceleration sensor, that attaches directly to commercial items, allowing for wireless monitoring without cables, using a receiver and controller to detect movements and trigger alarms only when a predetermined frequency signal is lost, thereby simplifying installation and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cable-type sensors are wired to commercial items for theft detection, then theft detection capability is achieved, but installation becomes complicated and retail shelves become disordered
Solution Approach 1:
The patent extracts the sensor functionality from the cable-type sensor system and integrates it directly into the antitheft device attached to commercial items. This eliminates the need for separate cable wiring while maintaining theft detection capability, directly resolving the contradiction between reliable detection and simple installation
Solution Approach 2:
The patent replaces the mechanical cable-type sensor system with a wireless antitheft device that uses radio wave transmission. This substitution eliminates physical wiring complexity while preserving the core detection function, addressing both the reliability and ease of operation requirements
2Adaptability or versatility
If the number of child devices is increased to monitor more commercial items, then monitoring coverage is improved, but the retail shelf appearance deteriorates
Solution Approach 1:
The antitheft device is designed as a universal unit that combines multiple functions: theft detection, motion detection, and wireless communication. This multi-functionality allows a single compact device to replace what would otherwise require multiple specialized components, maintaining monitoring coverage while improving appearance
Solution Approach 2:
The patent merges the sensor part, receiver, controller, and warning part into a single integrated antitheft device. This consolidation reduces the number of separate components needed on retail shelves while maintaining comprehensive monitoring coverage, directly addressing the appearance issue
3Reliability
If the receiver operates continuously to detect radio waves, then detection reliability is improved, but power consumption increases
Solution Approach 1:
The receiver operates periodically rather than continuously, checking for radio waves at intervals. This periodic operation maintains adequate detection reliability by frequently monitoring the presence of the parent device while significantly reducing power consumption compared to continuous operation
Solution Approach 2:
The system uses motion detection to trigger receiver operation only when needed. The motion detector identifies when the antitheft device is moved, and the receiver activates accordingly to verify loss of radio wave connection. This self-service approach ensures detection reliability during critical moments while minimizing unnecessary power consumption during stationary periods
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 reliable theft detection with a simple installation method, reducing the need for cables and minimizing maintenance, while accurately distinguishing between legitimate item rearrangement and theft attempts, thus maintaining a tidy retail environment.
Implementation Method 1
a receiver that detects a radio wave of a predetermined frequency transmitted by the transmitter
Implementation Method 2
a movement detector that detects a movement of a main body including the receiver and the controller
Implementation Method 3
a movement detector that detects a movement of a main body including the receiver and the controller
Data Source
Figure 1
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AI summary
There is provided an antitheft device and an antitheft system capable of reliably detecting theft via a simple installation method. The antitheft device includes a receiver 12 that receives a radio wave of a predetermined frequency, and a microcomputer (controller) 18 that determines whether or not the antitheft device is located at a position where it is impossible to detect a radio wave of a predetermined frequency by the receiver 12. The microcomputer (controller) 18 performs an alarming operation, upon determining that the antitheft device is located at a position where it is impossible to detect a monitoring radio wave WW of a predetermined frequency by the receiver 12. Accordingly, it suffices to attach the antitheft device 10 to a managed object MO such as a commercial item being monitored, and therefore it is not necessary to extend a cable from a sensor part attached to the commercial item.