Baggage Management Gate Using Barkhausen Effect Detection
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Solution Overview
Problem
Existing baggage management systems lack effective methods to detect and manage restricted magnetic materials passing through security checkpoints, leading to potential unauthorized movement of prohibited items.
Innovation Solution
A baggage management gate system that utilizes a magnetic field variation detecting device with an alternating magnetic field to identify magnetization reversal in Fe—Co-based amorphous metal wires, combined with personal information reading devices and motion sensors, to determine and control access based on predetermined security protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic field variation detecting device is used to detect restricted magnetic materials, then security detection capability is improved, but the system complexity increases due to multiple reading devices and control units
Solution Approach 1:
The system divides the detection function into separate components: a magnetic field variation detecting device for detecting restricted magnetic materials, and personal information reading devices for identifying individuals. This segmentation allows each component to specialize in its specific detection task, improving overall reliability while maintaining manageable complexity through modular design.
Solution Approach 2:
The control unit acts as an intermediary that integrates information from multiple sources (magnetic field detection, personal information reading) and makes determination decisions. This intermediary component coordinates the complex interactions between different devices, managing system complexity while enabling comprehensive security verification.
2Reliability
If multiple reading devices and control units are added to manage both persons and baggage, then security management capability is improved, but the device complexity increases
Solution Approach 1:
The system employs universal devices that perform multiple functions: reading devices that can read both personal information and baggage information, and control units that manage both person authentication and baggage verification. This multi-functionality reduces the total number of devices needed while maintaining comprehensive security management capability.
Solution Approach 2:
The system merges the detection and control functions into an integrated system where the magnetic field variation detecting device works in conjunction with personal information reading devices, and the control unit processes both types of information together. This merging allows coordinated management of persons and baggage through a unified control mechanism, improving security management while controlling complexity through integration.
3Measurement precision
If the magnetic field detection system is used to identify magnetization reversal, then detection precision is improved, but the difficulty of detecting and measuring increases due to the Barkhausen effect requirements
Solution Approach 1:
The system changes the measurement parameter from direct magnetic material detection to detection of magnetic field variations caused by magnetization reversal. By monitoring the Barkhausen effect-induced field variations rather than attempting to directly measure magnetic properties, the system achieves high detection precision while working within the constraints of the detection methodology.
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
Effectively detects and manages restricted magnetic materials by ensuring only authorized individuals and baggage with allowed magnetic materials pass through security checkpoints, reducing the risk of unauthorized movement and enhancing security levels.
Implementation Method 1
When an alternating magnetic field stronger than a coercive force is applied to the magnetic material, the magnetization of the magnetic material is rapidly reversed, which results in a variation in the magnetic field
Data Source
AI summary
A baggage management gate includes a first reading device and a second reading device, a detecting device, a determining unit, a first opening and closing device and a second opening and closing device. The baggage management gate manages baggage that is restricted to be carried in or out from a predetermined region. And in order away from the region in which the baggage is managed, the first reading device, the second opening and closing device, the detecting device for both the first person and the second person, the first opening and closing device, and the second reading device are arranged in an entrance direction from the passage to the management region in which the baggage is managed.