Radar-Based Baggage Inspection System for Threat Detection
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Solution Overview
Problem
Current baggage screening technologies face challenges in accurately distinguishing threat items from innocuous ones, leading to high false alarm rates, and require trained operators, posing health risks and being costly, especially in high-threat areas.
Innovation Solution
A baggage scanning system combining ultra-wide band radar arrays and metal detection systems with magnetic field generators and detectors, correlating radar and metal detector data to identify suspicious regions, allowing for efficient and low-cost scanning by untrained operators without health hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray scanning systems are used for baggage screening, then detection capability is improved, but health risk to operators and passengers increases
Solution Approach 1:
The patent replaces X-ray scanning systems with a radar-based detection system using electromagnetic waves in the microwave frequency range. This substitution eliminates ionizing radiation while maintaining detection capability through radar signal reflection and absorption characteristics of different materials.
Solution Approach 2:
The patent changes the detection parameter from ionizing radiation (X-rays) to non-ionizing electromagnetic waves (microwaves). This parameter change allows detection of threat items while eliminating health risks associated with ionizing radiation exposure.
2Measurement precision
If trained operators are used to analyze scanned images, then detection accuracy is improved, but operational cost increases
Solution Approach 1:
The patent implements automated analysis algorithms that process radar scan data without requiring trained operators. The system automatically identifies threat items based on dielectric properties and shape analysis, making the detection process self-sufficient and eliminating the need for expensive trained personnel.
Solution Approach 2:
The patent replaces human operators with automated computer-based analysis systems. This substitution eliminates the need for trained personnel while maintaining high detection accuracy through algorithmic analysis of radar scan data.
3Measurement precision
If manual searching of baggage is performed, then detection thoroughness is improved, but scanning time increases
Solution Approach 1:
The patent implements continuous radar scanning as baggage moves through the inspection tunnel on a conveyor system. This continuous automated scanning provides thorough detection without the time loss associated with manual stopping and searching, maintaining detection quality while enabling high-speed processing.
4Object-affected harmful factors
If radar arrays are used for non-ionizing radiation detection, then health safety is improved, but device complexity increases
Solution Approach 1:
The patent divides the radar detection system into multiple distributed radar sub-systems positioned around the inspection tunnel. Each sub-system independently scans a portion of the baggage, and their data is combined to provide complete coverage. This segmentation manages complexity by breaking down the overall system into manageable modular units.
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 reduces false alarms and operational costs by enabling efficient, low-risk scanning of carry-on baggage in high-threat areas, accurately identifying threat items and allowing for automated or manual further inspection as needed.
Implementation Method 1
a radar array distributed around the aperture, the radar array comprising a plurality of radar sub-systems for providing radar scan data comprising location and dielectric properties of a threat object in the baggage
Implementation Method 2
a metal detection system comprising: at least a plurality of magnetic field generators and a plurality of magnetic field detectors positioned respectively at least on two opposing sides of the aperture; and a processor configured to cause a magnetic field to be generated in the aperture via the magnetic field generators, configured to receive data from the plurality of magnetic field detectors and configured to determine values indicative of a magnetic field modified by the baggage passing through the aperture
Data Source
AI summary
The present specification provides a baggage scanning system including: an aperture defining a scanning tunnel; a conveyor moving through the scanning tunnel, a baggage being scanned moving on the conveyor; a UWB radar array surrounding the aperture for providing radar scan data corresponding to the baggage; a LCMD array positioned at a location around the baggage allowing obtaining of LCMD scan data corresponding to the baggage; and at least a processor for correlating the radar scan data and the LCMD scan data for providing one or more suspicious regions highlighted over a video image of the baggage being scanned.