Aviation Cargo X-Ray Scanning Layout for 3D Imaging
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Solution Overview
Problem
Existing inspection methods for aviation pallet cargo face challenges such as image overlap, limited scanning angles, low pass rates, high labor costs, and technical difficulties in handling large-sized objects, particularly in CT scanning systems with slip rings and integrated ray sources.
Innovation Solution
A dynamic-static combined scanning method using a movable ray source and detector assembly, with multiple distributed ray sources and a conveying device, allowing for a combined scanning angle greater than 180 degrees and reconstruction of three-dimensional images, while maintaining efficient object transport and reducing mechanical complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a CT scanning system with slip rings and integrated ray sources is used, then three-dimensional imaging capability is achieved, but mechanical complexity and maintenance costs increase
Solution Approach 1:
The system divides the inspection task into multiple two-dimensional scanning operations performed at different angles, rather than using a single complex three-dimensional CT scanner. Multiple ray sources are positioned at different angular locations around the conveyor, each performing independent 2D scanning. The results are then computationally reconstructed to form three-dimensional images, breaking down the complex 3D imaging function into simpler 2D components.
Solution Approach 2:
The system transitions from attempting direct three-dimensional scanning to using multiple two-dimensional scans taken at different angular positions. By adding the angular dimension and performing sequential 2D scans around the conveyor, the system achieves 3D imaging capability through dimensional transformation rather than direct 3D mechanical scanning.
2Measurement precision
If multiple ray sources are positioned at different angular locations, then scanning coverage and detection accuracy improve, but system complexity increases
Solution Approach 1:
The system combines multiple independent ray source units, each with its own detector assembly, into a coordinated scanning system. These modular units are positioned at different angular locations around the conveyor and work together to provide comprehensive scanning coverage. The modular design allows each unit to be relatively simple while the collective system achieves high detection accuracy through combined operation.
3Productivity
If the ray source and detector assembly move relative to the conveying device, then scanning efficiency improves, but mechanical complexity increases
Solution Approach 1:
The system employs dynamic scanning where the ray source and detector assembly move relative to the conveyor during the scanning process. This dynamic configuration allows the scanning apparatus to track and scan objects as they move through the inspection region, significantly improving scanning efficiency compared to static systems. The movement is coordinated with conveyor speed to maintain optimal scanning conditions throughout the process.
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
Enhances the detection of prohibited items by reducing image overlap and improving scanning efficiency and accuracy, while minimizing mechanical complexity and maintenance costs.
Implementation Method 1
a ray source configured to emit X-rays
Implementation Method 2
a detector assembly configured to receive X-rays emitted from the ray source and passing through an inspection region
Data Source
AI summary
An inspection system and method, and the system includes: a ray source; a detector assembly; and a conveying device for carrying an aviation pallet cargo. The ray source and the detector assembly are movable in a traveling direction parallel to the central axis relative to the conveying device so that the aviation pallet cargo enters an inspection region, the ray source is translatable between a plurality of scanning positions, and a translation distance of the ray source between two adjacent scanning positions is greater than a spacing between adjacent target spots of the ray source. When the ray source is located at one of the scanning positions, the ray source and the detector assembly move in the traveling direction and the ray source emits X-rays; and when the ray source and the detector assembly move a predetermined distance in the traveling direction, the ray source translates to another one of the plurality of scanning positions.