BLE Beacon Tracking for Cordless Barcode Scanner Theft Prevention
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Solution Overview
Problem
Cordless barcode scanners are challenging to track and are susceptible to being lost or stolen, with existing tracking methods prone to false alarms due to power outages, interference from other devices, and human or object obstruction, leading to increased risk of theft.
Innovation Solution
Implementing a system where a reader with a Bluetooth Low Energy (BLE) device broadcasts a beacon signal that is detected by a BLE device in the barcode scanner, triggering an alarm only when the scanner is out of range, reducing false alarms by using positive feedback instead of negative feedback loss of connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tracking system uses negative feedback (loss of connection) to detect barcode scanner removal, then the system can detect when a scanner is taken away, but it generates false alarms due to power outages, interference from other devices, and human or object obstruction
Solution Approach 1:
The patent inverts the traditional tracking approach by switching from negative feedback (detecting loss of connection) to positive feedback (detecting presence of beacon signal). The barcode scanner continuously monitors for the reader's beacon signal and triggers an alarm only when the signal is absent, eliminating false alarms caused by power outages, interference, or obstructions that would otherwise break the connection.
Solution Approach 2:
The patent introduces a beacon signal as an intermediary that the reader broadcasts and the scanner detects. This intermediary mechanism provides a reliable presence indication that is independent of direct communication connections, thereby resolving the false alarm problem while maintaining accurate tracking capability.
2Object-generated harmful factors
If the tracking system uses positive feedback (detection of beacon signal), then false alarms are reduced, but the system requires continuous beacon broadcasting which consumes energy
Solution Approach 1:
The reader broadcasts the beacon signal periodically rather than continuously, reducing energy consumption while maintaining reliable tracking. The scanner detects these periodic signals and determines presence based on their absence over a specified time period, effectively balancing energy efficiency with false alarm reduction.
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
This approach significantly reduces false alarms, enhancing the reliability of tracking systems and minimizing the risk of barcode scanners being lost or stolen by ensuring accurate detection of unauthorized removal.
Implementation Method 1
The first BLE device includes a first advertiser and a first listener, and the second BLE device includes a second advertiser and a second listener. The first advertiser of the reader is configured to broadcast a first beacon signal.
Data Source
AI summary
A system includes a reader having a first Bluetooth Low Energy (BLE) device and a barcode scanner having a second BLE device. The first BLE device includes a first advertiser and a first listener, and the second BLE device includes a second advertiser and a second listener. The first advertiser of the reader is configured to broadcast a first beacon signal. The barcode scanner is configured to: detect, by the second listener, the first beacon signal and in response to detecting the first beacon signal, generate an alarm.