Movable Diffraction Detection for Targeted Substance Identification
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Solution Overview
Problem
Current security inspection devices, such as radiographic imaging and CT inspection devices, struggle to accurately determine the presence of prohibited items within inspected objects without opening the package, as they primarily rely on shape observation rather than substance identification.
Innovation Solution
A diffraction detection apparatus with a bracket, diffraction radiation source, and detector that moves transversely across an inspection channel, allowing for diffraction radiation detection to determine the characteristics of substances, supported by tracks and lead screws for precise positioning, and integrated with a transmission imaging apparatus for initial scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radiographic imaging or CT inspection devices are used, then inspection speed is improved, but measurement precision of substance characteristics deteriorates
Solution Approach 1:
The inspection system is divided into two independent modules: a radiographic imaging module for rapid scanning and a diffraction detection module for precise substance identification. The radiographic module provides quick overview inspection, while the diffraction module performs detailed analysis only on suspected regions, thus maintaining high overall inspection speed while achieving precise substance characterization.
Solution Approach 2:
The radiographic imaging is performed first to quickly identify suspected prohibited items and their positions. Based on these preliminary results, the diffraction detection is then targeted only at the identified regions of interest. This preliminary action approach avoids performing expensive and time-consuming diffraction detection on the entire inspected object, thereby maintaining inspection efficiency while achieving accurate substance identification.
2Measurement precision
If diffraction detection is performed on the entire inspected object, then measurement precision of substance characteristics is improved, but loss of time increases
Solution Approach 1:
Diffraction detection is applied locally only to the suspected regions identified by radiographic imaging, rather than to the entire inspected object. The system determines the spatial coordinates of prohibited items from the radiographic image and directs the diffraction detection apparatus to inspect only those specific locations. This localized approach maintains high substance identification accuracy while significantly reducing the time required compared to full-object diffraction scanning.
Solution Approach 2:
Radiographic imaging is performed as a preliminary step to pre-identify suspected prohibited items and their positions. This preliminary action creates a targeted inspection list that guides the subsequent diffraction detection process, ensuring that time-consuming diffraction measurements are performed only where necessary, thus minimizing total inspection time while maintaining measurement precision.
3Measurement precision
If multiple detection apparatuses are deployed, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The diffraction detection apparatus is designed with movable components that can dynamically adjust their positions along the inspection channel. The radiation source and detector can move independently to reach different spatial coordinates, allowing a single apparatus to perform diffraction detection at multiple locations. This dynamic positioning capability replaces what would otherwise require multiple fixed detection stations, thereby reducing system complexity while maintaining the ability to perform comprehensive substance identification.
Solution Approach 2:
The diffraction detection apparatus is designed as a multi-functional unit that can perform substance identification at any position within the inspection channel. By integrating movable radiation sources, detectors, and positioning mechanisms into a single apparatus, the system achieves the functional equivalence of multiple fixed apparatuses. This universal design reduces device complexity while maintaining the capability to precisely identify substances throughout the entire inspection area.
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
Enables accurate identification of prohibited items by determining their atomic coefficients and composition without opening the package, reducing device costs and improving inspection efficiency through targeted diffraction detection.
Implementation Method 1
the diffraction radiation detector is configured to receive diffracted radiation from an inspected object on the inspection channel to determine a characteristic of a substance causing diffraction
Data Source
Figure 1
AI summary
The present disclosure provides a diffraction detection apparatus, an inspection device, an inspection method and an inspection system. The diffraction detection apparatus includes a bracket, a diffraction radiation source, and a diffraction radiation detector, where the diffraction radiation detector and the diffraction radiation source define an inspection channel extending along a first direction, and the diffraction radiation detector is configured to receive diffracted radiation from an inspected object on the inspection channel to determine a characteristic of a substance causing diffraction. The bracket is configured to allow the diffraction radiation source and the diffraction radiation detector to move on the bracket across the inspection channel in a second direction, where the second direction is transverse to the first direction.