Dual-Angle X-Ray Luggage Screening for High-Throughput Checkpoints
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Solution Overview
Problem
Conventional X-ray luggage screening systems are inefficient for large events due to low throughput, space constraints, and the need for extensive manual inspection, compromising security and efficiency.
Innovation Solution
An X-ray scanner design with two non-right-angle X-ray beams, machine vision for threat detection, and automated conveyors to enhance throughput, reduce size, and enable automatic threat detection without human intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional single-perspective X-ray scanning is used, then the system structure is simple, but the screening speed is slow (250-300 bags per hour) and cannot meet the requirements of large-scale events
Solution Approach 1:
The patent divides the scanning process into two separate perspectives with two independent X-ray sources and detectors. Each X-ray source (first and second) operates at different angles (50-60 degrees apart) to capture images from multiple viewpoints, allowing parallel processing and faster screening while maintaining manageable system complexity through modular architecture
Solution Approach 2:
The patent transitions from single-perspective to multi-perspective scanning by introducing a second scanning dimension at 50-60 degree angles. This dimensional addition enables simultaneous capture of multiple views, increasing throughput without proportionally increasing system complexity
2Productivity
If multiple conventional X-ray systems are deployed to handle large volumes, then the screening capacity increases, but the space requirement increases significantly
Solution Approach 1:
The patent merges two X-ray scanning functions into a single integrated system. By combining two X-ray sources, two detectors, and a unified conveyor system within one housing, the patent achieves the screening capacity of multiple systems while occupying the space of only one system
Solution Approach 2:
The single X-ray system performs multiple scanning functions simultaneously by capturing images from two different perspectives (50-60 degrees apart). This multi-functionality allows one system to replace multiple single-perspective systems, reducing overall space requirements while maintaining high screening capacity
3Productivity
If manual inspection of X-ray images is performed, then detection accuracy can be maintained, but the process requires extensive operator workload and time
Solution Approach 1:
The patent replaces manual visual inspection with automated machine vision algorithms that process X-ray images computationally. The system uses computer-based image analysis to detect threats automatically, substituting human operators with automated processing that can handle multiple images simultaneously, thereby increasing throughput while reducing operator workload
Solution Approach 2:
The system performs self-inspection through automated threat detection algorithms that analyze X-ray images without human intervention. The machine vision system independently identifies potential threats, allowing the system to operate autonomously and maintain high throughput without requiring constant operator attention
4Measurement precision
If high-power X-ray sources are used to ensure detection accuracy, then the radiation exposure to operators and attendees increases
Solution Approach 1:
The patent divides the detection task across two X-ray sources operating at moderate power levels (100-160 kV) from different angles. By segmenting the imaging function into two perspectives, each source can use lower power while the combined information from both views maintains or improves detection accuracy, thereby reducing overall radiation exposure
Solution Approach 2:
The patent changes the operating parameters of the X-ray sources to 100-160 kV, which provides optimal balance between penetration power and radiation dose. Combined with the dual-perspective geometry (50-60 degrees apart), this parameter optimization achieves high detection accuracy while minimizing harmful radiation exposure to operators and attendees
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 achieves 2-5 times faster luggage screening with reduced space requirements, lower radiation exposure, and minimal operator workload, ensuring high detection accuracy and efficiency.
Implementation Method 1
a first X-ray source with a first X-ray beam direction; a second X-ray source with a second X-ray beam direction
Implementation Method 2
a first detector that detects the first X-ray beam after the luggage piece passes through the beam; and a second detector that detects the second X-ray beam after the luggage piece passes through the beam
Data Source
AI summary
Scanner, including housing; first conveyor that transports luggage into housing; first plurality of sensors detects presence of luggage on first conveyor; second conveyor transports luggage through housing; second plurality of sensors detects presence of luggage on the second conveyor; pickup table for luggage pieces that do not require manual inspection; third conveyor that transports luggage to pickup table; first conveyor does not move luggage into housing as long as previous luggage was not sent to pickup table or until luggage taken from first conveyor; first X-ray source with first beam direction; second X-ray source with second beam direction, wherein first and second beam directions are 50-60 degrees apart; wherein first X-ray source has 100-160 KVolt on its anode; wherein second X-ray source has 100-160 KVolt on its anode; first detector detects first X-ray beam after luggage passes through beam; second detector detects second beam after luggage passes through beam.