Synchronized Radioactive Material Detection in X-ray Inspection
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Solution Overview
Problem
The accuracy of positioning radioactive material in X-ray images is not high enough due to differences in scanning and detection processes, leading to deviations in mapping inspection results between X-ray and radioactive material systems, especially when vehicles do not move at constant speeds or change order during inspection.
Innovation Solution
A synchronized inspection system that integrates X-ray scanning and radioactive material detection, where the radioactivity detector operates simultaneously with X-ray imaging, using the accelerator's beam emission frequency and vehicle movement speed to accurately mark and calculate the position of radioactive material within the X-ray image, reducing errors in correspondence between inspection results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radioactive material detection and X-ray scanning are performed as separate sequential processes, then each inspection can be completed independently, but the positioning accuracy of radioactive material in X-ray images deteriorates due to different starting points and compression ratios
Solution Approach 1:
The patent merges the radioactive material detection system and X-ray scanning system into a single integrated inspection system. The radioactive material detector and X-ray detector share the same inspection channel, allowing simultaneous detection during the same scanning process. This eliminates the positioning errors caused by separate sequential processes while maintaining system reliability.
Solution Approach 2:
The patent introduces a synchronous signal as an intermediary to coordinate between the radioactive material detection process and X-ray scanning process. The synchronous signal ensures that both detectors operate in sync, allowing accurate temporal and spatial correlation of detection data with the moving vehicle, thereby achieving precise positioning in the X-ray image.
2Ease of operation
If the inspection system uses different starting points for radioactive material detection and X-ray scanning, then each system can operate according to its own process requirements, but the mapping between inspection results and X-ray images generates large deviations
Solution Approach 1:
The patent implements preliminary synchronization calibration before the actual inspection process. The system pre-establishes the correspondence relationship between the radioactive material detector and X-ray detector, including their starting points and scanning speeds. This preliminary action ensures that during operation, both detectors are already synchronized, eliminating mapping deviations without restricting operational flexibility.
3Adaptability or versatility
If the vehicle moves at non-constant speed during inspection, then the inspection process can adapt to real-world traffic conditions, but the calculated vehicle speed and resulting inspection accuracy are influenced and reduced
Solution Approach 1:
The patent employs periodic synchronous signals to continuously monitor and track the vehicle's movement during inspection. Instead of relying on a single speed calculation, the system uses periodic synchronization markers to detect speed variations in real-time and dynamically adjust the inspection data correlation. This periodic action maintains measurement precision even when the vehicle moves at non-constant speed.
4Productivity
If the order of vehicles changes during X-ray inspection after radioactive material screening, then inspection efficiency can be optimized by reordering, but the correspondence between RM inspection results and X-ray images becomes erroneous
Solution Approach 1:
The patent implements a feedback mechanism using unique identification markers for each vehicle. When vehicles are reordered during X-ray inspection, the synchronous detection system continuously monitors the identification markers and automatically updates the correspondence relationship between radioactive material detection results and X-ray images. This feedback loop maintains vehicle identification accuracy while allowing inspection efficiency optimizations.
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 approach enhances the accuracy of positioning radioactive material in X-ray images, ensuring precise localization and minimizing errors in inspection results, even when vehicles do not move at constant speeds or change order during inspection.
Implementation Method 1
an X-ray is transmitted through a vehicle to be scanned, to form an X-ray image of the vehicle
Implementation Method 2
when a beam is emitted by an accelerator, a detector starts to collect data
Implementation Method 3
A radioactivity detector is configured to detect whether an inspected object comprises radioactive material
Data Source
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AI summary
A system and method for positioning radioactive material are provided. A scanning and imaging apparatus comprises a ray source (110) configured to generate an X-ray and a detection device (150) configured to receive an X-ray transmitted through an inspected object (140), wherein the ray source (110) is configured to image the inspected object (140) by emitting the X-ray to the inspected object (140). A radioactivity detector (130) is configured to detect whether the inspected object (140) comprises radioactive material synchronously with the process of scanning implemented by the scanning and imaging apparatus. In a case that the radioactivity detector (130) detects radioactive material, an actual position of the radioactive material in an X-ray image of the inspected object (140) obtained by the scanning and imaging apparatus is marked in the image. The above solutions improve the accuracy of displaying the position of the radioactive source in the X-ray image. Further, inspection of radioactive material can be implemented while scanning an image. In this way, an error in the correspondence between inspection results of two systems when the two systems operate independently is avoided.