Radioactive Source Detection via Count Rate Curve Pattern Recognition
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Solution Overview
Problem
Existing radioactive source detection devices often trigger false alarms due to naturally occurring materials, leading to inefficiencies in customs clearance, as they require manual observation and extensive training to differentiate between innocent and hazardous sources.
Innovation Solution
A method and device that measure a count rate curve of an inspection object while it moves, performing pattern recognition only if the maximum count rate exceeds a threshold, and determining whether the sources are bulk or point radioactive sources through pattern matching and mathematical characteristics analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual observation of count rate profile is used to determine radioactive source types, then false alarms can be reduced, but staff training burden and operational complexity increase significantly
Solution Approach 1:
The patent replaces manual visual observation with an automated computer-based pattern recognition system. The system automatically analyzes count rate curves, calculates mathematical characteristics (kurtosis, magnitude of decrease), and compares them against predetermined patterns to identify point sources versus bulk sources. This substitution eliminates the need for trained personnel to manually interpret profiles while maintaining high accuracy in distinguishing radioactive source types.
Solution Approach 2:
The system performs self-diagnosis and automatic classification of radioactive sources without requiring human intervention. The pattern recognition algorithm autonomously processes the count rate data, determines source types, and generates alerts only when point sources are detected. This self-service capability reduces operational complexity while preserving reliable detection.
2Reliability
If multiple staff members are deployed to reduce individual work shift duration, then staff concentration can be maintained, but personnel burden and administrative costs increase
Solution Approach 1:
The automated system performs the observation function continuously without fatigue or concentration lapses, eliminating the need for multiple staff members working in shifts. A single operator can manage multiple devices simultaneously since the system autonomously monitors and classifies radioactive sources, reducing personnel requirements while maintaining or improving observation quality.
3Measurement precision
If pattern recognition is performed on all count rate curves, then all radioactive sources can be identified, but processing time and computational resources increase
Solution Approach 1:
The system applies pattern recognition selectively rather than universally. It first checks whether the maximum count rate exceeds a predetermined threshold, and only then performs full pattern recognition analysis. This partial action approach focuses computational resources on suspicious cases while quickly dismissing normal backgrounds, maintaining high identification accuracy for point sources while reducing overall processing time.
4Measurement precision
If extensive training is provided to picture observing staff, then alarm differentiation accuracy improves, but training time and operational burden increase
Solution Approach 1:
The system replaces the need for human training with an automated pattern recognition algorithm that has been pre-programmed with the knowledge to distinguish point sources from bulk sources. The algorithm automatically calculates mathematical characteristics and compares them against predetermined patterns, eliminating the time-consuming training process while maintaining or improving differentiation accuracy.
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 reduces false alarms and improves operational efficiency by accurately distinguishing between types of radioactive sources, reducing the burden on staff and enhancing customs clearance processes.
Implementation Method 1
measuring, by a detector, a count rate curve of an inspection object while the inspection object moves through the detector
Data Source
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AI summary
The present disclosure proposes a method and device for detecting radioactive sources. The method for detecting radioactive sources comprises: measuring, by a detector, a count rate curve of an inspection object while the inspection object moves through the detector; performing pattern recognition on the count rate curve; and determining whether there are radioactive sources in the inspection object according to a result of the pattern recognition and determining a type of the radioactive sources if there are radioactive sources in the inspection object.