Security Scanning System Using Focused X-ray Beam for Carry-on Items
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Solution Overview
Problem
Current security scanning methods for carry-on items are inefficient due to the need for large and heavy CT scanners, which pose health risks and require significant space, and often require manual inspection of liquids and gels, causing inconvenience to travelers.
Innovation Solution
A method where carry-on items are scanned as a group using a polychromatic X-ray beam focused by a tube-shaped member, allowing for simultaneous scanning of multiple areas with lower-powered X-ray sources, reducing the need for extensive shielding and enabling precise detection of threats without manual inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CT scanning is used to scan carry-on items, then scanning accuracy is improved, but the equipment becomes very large and heavy
Solution Approach 1:
The scanning system is divided into two stages: a first stage module for initial scanning and a second stage module for further scanning of specific items. This segmentation allows the system to achieve high accuracy only where needed while keeping the overall equipment compact and manageable in weight.
Solution Approach 2:
Instead of scanning all carry-on items with high-powered CT scanners, the system performs partial scanning on selected items that require further inspection. This partial action approach maintains scanning accuracy for problematic items while avoiding the need for extensive high-power scanning infrastructure for all items.
2Measurement precision
If CT scanning is used to scan carry-on items, then scanning accuracy is improved, but the equipment requires heavy shielding
Solution Approach 1:
The scanning process is segmented into two stages with different shielding requirements. The first stage module uses lower power X-ray sources requiring minimal shielding, while the second stage module handles further scanning of selected items. This segmentation reduces the overall shielding complexity compared to using high-power CT scanners for all items.
Solution Approach 2:
High-power X-ray sources and extensive shielding are applied locally only in the second stage module where further scanning is performed, rather than throughout the entire scanning system. This local quality approach maintains accuracy where needed while minimizing overall shielding requirements.
3Measurement precision
If carry-on items are scanned one after another, then scanning accuracy is improved, but scanning time increases
Solution Approach 1:
The system performs rapid initial scanning of multiple items in parallel using the first stage module, then applies detailed further scanning only to selected items requiring additional inspection. This partial action approach maintains accuracy for problematic items while significantly reducing total scanning time compared to sequential scanning of all items.
4Measurement precision
If manual inspection of liquids and gels is performed, then detection accuracy is improved, but traveler convenience deteriorates
Solution Approach 1:
The system replaces manual inspection with automated X-ray scanning technology that can detect threats in liquids and gels. The second stage module uses focused X-ray beams to accurately identify potential threats in transparent containers without requiring travelers to remove or manually inspect their items, thereby maintaining detection accuracy while preserving traveler convenience.
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
This approach simplifies handling, reduces scanning time, and allows for accurate threat detection without manual inspection, improving the efficiency and safety of security scanning while accommodating liquids and gels in smaller volumes.
Implementation Method 1
the X-ray source emits photons in a polychromatic X-ray beam, which photons are focussed towards the measuring position by the focusing device
Implementation Method 2
at least one second detector detects diffracted X-rays from the local area
Data Source
Figure 1~2
Figure 3~5
Figure 6~9
AI summary
A security scanning system (1) comprises a first stage module (3) and a second stage module (11). In the second stage, a group of carry-on items (4) determined in the first stage to have at least one local area (27) requiring further scanning is further scanned. The group of carry-on items and a X-ray source and a focusing device are mutually positioned so that a measuring position (25) is in line with the local area requiring further scanning, and the X-ray source emits photons in a polychromatic X-ray beam, which photons are focussed towards the measuring position by the focusing device (24), and at least one second detector (22) detects diffracted X-rays from the local area.