Magnetic Response Distribution Visualization for Security Inspection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current security inspection technologies, such as millimeter wave technology, face challenges in detecting target objects due to obstacles like living bodies and metal cases, leading to difficulties in accurately imaging moving objects, especially when they are concealed or hidden behind shielding materials.
Innovation Solution
A magnetic response distribution visualization device that induces a magnetic field component from outside a moving object, senses its strength and phase at multiple points in time, and uses an information processing circuit to calculate and generate an image showing the distribution of the magnetic field response, allowing for accurate security inspection even with moving objects and shielding present.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If millimeter wave technology is used for security inspection, then scanning speed and accuracy are improved, but detection capability deteriorates when obstacles such as living bodies and metal cases are present
Solution Approach 1:
The patent introduces magnetic field as an intermediary between the inspection system and the target object. Instead of using millimeter waves that are blocked by obstacles, the system uses magnetic field sensors to detect magnetic field variations caused by concealed objects. This intermediary approach allows penetration through obstacles like living bodies and metal cases, resolving the contradiction between scanning accuracy and detection reliability.
Solution Approach 2:
The patent replaces the electromagnetic wave-based millimeter wave system with a magnetic field-based detection system. This substitution allows the system to detect objects through obstacles that block millimeter waves, thereby maintaining high scanning accuracy while improving detection capability in challenging environments.
2Reliability
If magnetic field sensing is performed outside the moving object, then detection reliability is improved, but measurement precision deteriorates due to distance from the object
Solution Approach 1:
The patent employs dynamic sensing where the sensor moves along with the moving object or the object passes through a fixed sensing zone. This dynamic arrangement maintains optimal sensing distance while ensuring reliable detection. The system captures magnetic field data at multiple positions and uses processing circuits to reconstruct accurate magnetic field distributions, resolving the contradiction between external sensing reliability and measurement precision.
Solution Approach 2:
The patent transitions from point-based magnetic field measurement to distributed field distribution mapping. By measuring magnetic field strength at multiple spatial positions and reconstructing the three-dimensional field distribution, the system achieves both reliable external sensing and precise measurement of the object's magnetic response characteristics.
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 device effectively generates a high-accuracy image of the magnetic response distribution, enabling the detection of concealed objects and reducing noise, thus improving the effectiveness of security inspections by accurately depicting the presence and location of objects behind shielding materials.
Implementation Method 1
an induction circuit that induces, from outside a moving object, a magnetic field component that is a component of a magnetic field that satisfies a fundamental equation for magnetic fields
Implementation Method 2
a sensor that senses a strength and a phase of the magnetic field including the magnetic field component altered by the moving object, at a plurality of points in time outside the moving object
Data Source
AI summary
A magnetic response distribution visualization device includes: an induction circuit that induces a magnetic field component from outside a moving object; a sensor that senses a strength and a phase of the magnetic field at a plurality of points in times outside the moving object; and an information processing circuit that, based on a sensing result of the strength and the phase, a moving speed of the moving object, and a fundamental equation for magnetic fields, calculates a strength and a phase of the magnetic field at a vicinal position closer to the moving object than the sensor, and generates, based on a calculation result of the strength and the phase, a magnetic response distribution image for security inspection that shows a distribution of a response of the moving object to the magnetic field component induced by the induction circuit.