Magnetic Sensor Array for Distant Weapon Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies fail to effectively detect concealed weapons in high-traffic or public settings, making it difficult to prevent weapon-related casualties and acts of terrorism.
Innovation Solution
A system using a magnetic sensor array and fingerprint processing system to generate and classify magnetic fingerprint images of perturbations in the ambient magnetic field, allowing for the autonomous detection, identification, and tracking of ferrous metallic objects from a distance, without human intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic sensors are placed close to detect ferrous metallic objects, then detection precision is improved, but the system cannot maintain safe distance for public safety applications
Solution Approach 1:
The system divides the detection task into multiple independent magnetic sensors arranged in an array, each contributing to the overall detection capability. By segmenting the sensing function across multiple sensors, the system achieves both precise local measurements and extended detection distance through collective signal processing.
Solution Approach 2:
The patent transitions from single-point magnetic field measurement to spatially distributed measurement by arranging sensors in an array configuration. This dimensional expansion from 0D (single point) to 2D or 3D (array) enables simultaneous achievement of high precision through local measurements and long detection distance through spatial distribution.
2Reliability
If traditional metal detectors are used in high-traffic public settings, then detection capability is limited, but implementing effective weapon detection is difficult
Solution Approach 1:
The system replaces traditional mechanical metal detector systems with a magnetic field-based sensing array. This substitution enables passive detection of ferrous metallic objects through magnetic field perturbations, eliminating the need for active scanning mechanisms and reducing mechanical complexity while improving reliability in public settings.
Solution Approach 2:
The magnetic sensors passively detect ferrous metallic objects by measuring natural perturbations in the ambient magnetic field without requiring active engagement or complex scanning mechanisms. The system serves itself by utilizing the Earth's magnetic field as the sensing medium, reducing operational complexity in high-traffic environments.
3Length of stationary object
If multiple sensors are used to extend detection distance, then detection range is improved, but system complexity increases
Solution Approach 1:
The patent combines multiple magnetic sensors into a unified detection array where individual sensor measurements are merged through signal processing algorithms. This merging approach extends detection distance by aggregating signals from multiple sensors while managing complexity through integrated processing that treats the array as a cohesive detection unit rather than separate components.
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 real-time detection and identification of concealed weapons, determining their location and type, thereby enhancing public safety and preventing potential threats in public spaces.
Implementation Method 1
a plurality of magnetic field sensors that each measure an ambient magnetic field
Data Source
AI summary
An apparatus for distant detection of ferrous metallic objects includes a plurality of magnetic field sensors and a fingerprint processing system. The plurality of magnetic field sensors each measure an ambient magnetic field. The fingerprint processing system receives, from the plurality of magnetic field sensors, magnetic field data corresponding to the ambient magnetic field. The fingerprint processing system also generates, from the magnetic field data, a magnetic fingerprint image of one or more perturbations of the ambient magnetic field. The plurality of magnetic field sensors is separated from the ferrous metallic objects being detected by a detection distance that is greater than or equal to 0.5 meters.