DR and CT Subsystem Merging for Luggage Detection
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Solution Overview
Problem
Current luggage detection methods, such as DR and CT scanners, face challenges in balancing speed and accuracy, with DR scanners being too fast but inaccurate and CT scanners being too slow for quick examination.
Innovation Solution
Combining projection data from both DR and CT subsystems to increase the amount of data used for judgment, improving detection accuracy and speed by obtaining and analyzing data at multiple angles and layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DR detection apparatus is used to examine luggage at high speed, then examination speed is improved, but detection accuracy deteriorates
Solution Approach 1:
The patent combines projection data from both the DR subsystem and CT subsystem to perform integrated judgment. The judging device obtains projection data from both subsystems and uses their combined information to detect dangerous articles, thereby achieving both high speed (from DR) and high accuracy (from CT) simultaneously.
2Measurement precision
If CT detection apparatus is used to accurately judge explosive in luggage, then detection accuracy is improved, but examination speed deteriorates
Solution Approach 1:
The patent merges the projection data from the DR subsystem with the projection data from the CT subsystem. The judging device uses both data sources together to make the final judgment, thereby achieving accurate detection of dangerous articles while maintaining high examination speed through the DR component.
3Productivity
If DR apparatus performs prejudgment on all luggage, then examination speed is maintained, but detection accuracy deteriorates due to poor DR detection accuracy
Solution Approach 1:
Instead of relying solely on DR prejudgment or CT re-judgment, the patent combines projection data from both DR and CT subsystems for integrated judgment. This approach maintains the speed advantage of DR while incorporating the accuracy advantage of CT, eliminating the need for sequential prejudgment and re-judgment processes.
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
This combination enhances both the accuracy and speed of luggage screening by doubling the data information for judgment, reducing false positives and negatives.
Implementation Method 1
obtaining a first projection data on x-ray attenuation coefficient by using the DR subsystem to project the A-layer of an article at a first projection angle, and obtaining a second projection data on x-ray attenuation coefficient by using the CT subsystem to project the A-layer of an article at a second projection angle different from the first projection angle
Data Source
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AI summary
The present invention discloses a detecting method of the article detection apparatus (2) composed of an individual DR subsystem (2) and an individual CT subsystem (3), the method comprising: obtaining a first projection data on ray attenuation coefficient by using the DR subsystem to project the A-layer of an article (Fig.3) at a first projection angle, and obtaining a second projection data on ray attenuation coefficient by using the CT subsystem to project the A-layer of the article at a second projection angle different from the first projection angle; and judging whether the A-layer of the detected article exists a dangerous article based on the first projection data and the second projection data so as to obtain a first judgment on the A-layer of the detected article. In the present invention, by combining the projection data of the DR subsystem and the projection data of the CT subsystem, the data information to be used to judge the detected article is greatly increased, therefore, both the detection accuracy and speed are improved.