Portable Magnetostatic Detection System for Assault Rifle Identification
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Solution Overview
Problem
Current methods for detecting assault rifles at public places using magnetostatic sensors are hindered by false alarms from metal objects like smartphones, and existing solutions are either cumbersome or not suitable for public venues due to space and installation constraints.
Innovation Solution
A detection system comprising multiple magnetic sensors and a processing unit that applies an attenuation coefficient to signals, allowing for reliable differentiation between small metal objects and assault rifles, while being portable and easy to install/uninstall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensitivity of magnetostatic sensors is increased to detect assault rifles, then the detection capability improves, but false alarms from smartphones and other metal objects increase
Solution Approach 1:
The patent applies parameter changes by modifying the magnetic field frequency characteristics. The system generates a magnetic field at a specific frequency (e.g., 50-60 Hz or higher) and detects responses at this frequency, thereby distinguishing assault rifles from smartphones which have different magnetic signatures. This frequency-based differentiation resolves the contradiction by maintaining high sensitivity while reducing false alarms through selective frequency detection.
Solution Approach 2:
The system employs feedback mechanisms where the detection result from one sensor informs the operation of other sensors. The processing unit analyzes signals from multiple magnetostatic sensors and uses feedback loops to adjust detection thresholds and parameters dynamically, reducing false alarms while maintaining detection sensitivity for assault rifles.
2Adaptability or versatility
If portable barriers with magnetostatic sensors are used instead of fixed gates, then installation flexibility and portability improve, but detection uniformity and sensitivity decrease
Solution Approach 1:
The patent applies dynamics by making the detection system adaptable to different positions and orientations. The portable barriers can be dynamically positioned and adjusted, and the system compensates for position variations through signal processing algorithms that normalize detection results regardless of the barrier's location or orientation, thereby maintaining detection uniformity while preserving portability.
Solution Approach 2:
The processing unit is designed with universal functionality to handle detection data from multiple sensors in various configurations. It can process signals whether the barriers are arranged in a gate formation, individually, or in different spatial arrangements, making the system universally applicable while maintaining consistent detection performance across different deployment scenarios.
3Measurement precision
If multiple barriers are placed close together to form a gate, then detection sensitivity improves, but the system becomes bulky and difficult to transport
Solution Approach 1:
The patent merges multiple functions into a single portable barrier unit. Each barrier integrates multiple magnetostatic sensors, processing units, and power supplies, allowing a single unit to perform detection functions that previously required multiple separate components. This consolidation maintains detection sensitivity while significantly improving portability and reducing transport difficulty.
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 discriminates between assault rifles and smaller metal objects, reducing false alarms and maintaining sensitivity, and is designed for quick installation and use in public places, enhancing security without hindering emergency exits.
Implementation Method 1
at least one first magnetic sensor configured to generate a signal representative of an intensity of a detected magnetic field
Data Source
AI summary
A system for detecting a target object including: a first and a second detector which have magnetic sensors configured to detect a magnetic field and to generate a signal which indicates a magnetic field intensity; a processing unit configured to receive the signals which indicate an intensity of a magnetic field detected by the sensors; and a communication interface which is configured to transmit the signals generated by the magnetic sensors to the processing unit, the processing unit additionally being configured to determine a corrected value of the signals generated by the magnetic sensors of the first and second detectors and, when the corrected value is greater than a predetermined threshold value, to send instructions for generating an alarm.