3D X-Ray Cargo Inspection Layout for Overlap-Free Multi-Angle Scanning
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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 high manufacturing costs, particularly in systems using single-view or dual-view X-ray, multi-view X-ray, and CT scanning, which affect the detection of prohibited items like explosives and require complex components with high machining accuracy.
Innovation Solution
An inspection system with a carrying device that rotates around a central axis, utilizing multiple distributed ray sources and a detector assembly, which are lifted or lowered along the axis to achieve a combined scanning angle greater than 180 degrees, allowing for three-dimensional scanning and avoiding component complexity through a dynamic-static combined scanning method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional X-ray inspection methods are used for aviation pallet cargo, then the inspection process is simple, but the recognition accuracy is low and labor costs are high
Solution Approach 1:
The inspection system is divided into multiple independent ray sources (at least two ray sources) positioned at different locations, each capable of emitting X-rays through different paths. This segmentation allows the system to capture multiple perspectives of the cargo simultaneously, improving recognition accuracy without requiring a single complex monolithic device
Solution Approach 2:
The system transitions from traditional single-plane X-ray inspection to three-dimensional spatial inspection by positioning ray sources and detectors at different heights and angles. The ray sources are arranged at different positions relative to the cargo, and detectors are positioned to receive X-rays from multiple angles, creating a three-dimensional detection space that enables accurate identification of prohibited items throughout the cargo volume
2Area of stationary object
If the ray source and detector assembly are fixed in position, then the device structure is simple, but the scanning coverage is limited
Solution Approach 1:
The ray source and detector assembly are designed to be movable rather than fixed. The ray source can be positioned at different locations relative to the cargo, and the detector assembly can be adjusted to different positions and angles. This dynamic positioning capability allows the system to scan the entire cargo volume from multiple perspectives, achieving comprehensive coverage while maintaining relatively simple individual components
3Measurement precision
If a single X-ray source is used, then the system structure is simple, but the imaging quality is poor due to overlapping images
Solution Approach 1:
The system uses at least two ray sources positioned at different locations, with each ray source having its own detector assembly. This segmentation creates separate X-ray paths that avoid overlapping images, as each ray source captures information from its specific angle and position, eliminating the image overlap problem inherent in single-source systems
Solution Approach 2:
Multiple ray sources and detector assemblies are combined to work together as an integrated inspection system. The data from all ray sources is processed to create a comprehensive three-dimensional image of the cargo, merging the advantages of multiple perspectives to achieve superior imaging quality that cannot be obtained from a single source
4Productivity
If manual inspection methods are used, then the equipment requirements are low, but the inspection efficiency is low and labor costs are high
Solution Approach 1:
The inspection system performs automated detection and analysis of the cargo without requiring manual intervention. The multiple ray sources and detector assemblies automatically capture X-ray data, process the information to identify prohibited items, and generate inspection results. This self-service capability dramatically improves inspection efficiency while the automated processing reduces the need for complex manual handling procedures
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 provides efficient and accurate detection of prohibited items in large aviation pallet cargoes by minimizing image overlap and reducing component complexity, improving detection capabilities and maintaining efficiency while lowering costs.
Implementation Method 1
at least one ray source configured to emit X-rays
Data Source
AI summary
An inspection system and method, the inspection system includes: a carrying device, at least one ray source and a detector assembly. The ray source and the detector assembly are lifted or lowered along a central axis of the carrying device relative to the carrying device. When viewed along the central axis, the ray source is translatable between scanning positions relative to the carrying device. When the ray source is at one of the scanning positions the ray source and the detector assembly are lifted or lowered relative to the carrying device along the central axis, and the ray source emits X-rays; and when the ray source and the detector assembly are lifted or lowered a predetermined distance the ray source translates to another scanning position. The inspection system further reconstructs a three-dimensional scanning image of the object to be inspected based on detection data of the detector assembly.