Combined Transmission and Diffraction Inspection for Prohibited Item Detection
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Solution Overview
Problem
Current security inspection devices, such as advanced CT inspection devices, can observe the general shape of suspicious items but struggle to accurately determine whether they contain prohibited objects.
Innovation Solution
An inspection device incorporating a transmission imaging apparatus and a diffraction detection apparatus, where the diffraction detection apparatus moves laterally to detect radiation diffracted by suspicious items, allowing for precise determination of item characteristics without opening the package.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ray transmission imaging is used to inspect items, then items can be inspected quickly without opening packages, but the ability to accurately determine whether prohibited objects are present is insufficient
Solution Approach 1:
The patent combines transmission imaging apparatus and diffraction detection apparatus into a single inspection device. The transmission imaging provides rapid overview inspection while the diffraction detection provides precise material characterization. By merging these two functional modules, the system achieves both high inspection speed and accurate prohibited item detection without requiring separate inspection systems.
Solution Approach 2:
The inspection process is segmented into two stages: first, transmission imaging performs rapid screening to identify suspicious items; second, diffraction detection performs precise characterization of suspected prohibited objects. This segmentation allows the system to maintain high productivity for general inspection while allocating resources for high-precision detection only when necessary.
2Measurement precision
If multiple detectors are deployed along the inspection channel to improve detection accuracy, then prohibited items can be detected more accurately, but device complexity and cost increase
Solution Approach 1:
The diffraction detection apparatus serves multiple functions: it detects the presence of prohibited items, characterizes their material composition, and provides precise positioning information. By making this single detector multi-functional, the patent eliminates the need for multiple specialized detectors along the inspection channel, thereby reducing device complexity while maintaining high detection accuracy.
Solution Approach 2:
The diffraction radiation detector is designed to move laterally along the inspection channel to reach specific positions where suspicious items are located. This dynamic positioning capability allows a single detector to inspect different locations of the inspected object, replacing the need for multiple fixed detectors and reducing overall system complexity.
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 ability to accurately identify and characterize suspicious items within inspected objects, improving the detection of prohibited items without the need for multiple detectors along the inspection channel, thereby reducing costs and complexity.
Implementation Method 1
a transmission imaging apparatus supported by the bracket and configured to construct a transmission image of an inspected object
Implementation Method 2
a diffraction radiation detector configured to move on the bracket along a lateral direction of the inspection channel, to a specific position to receive a radiation diffracted by at least a part of the inspected object
Data Source
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AI summary
Provided are an inspection device and an inspection method thereof, an inspection system. The inspection device includes: a transmission imaging apparatus for constructing a transmission image of an inspected object; and a diffraction detection apparatus for detecting characteristics of at least part of the inspected object. The transmission imaging apparatus defines an inspection channel. The inspection device includes a linear track spanning the inspection channel along a lateral direction. The diffraction detection apparatus is movable along the linear track to a specific position to detect radiations diffracted by at least part of the inspected object.