Radiation Portal Detector Sets for Accurate Source Characterization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radiation portal monitoring systems (RPMs) are complex and costly due to the need for extensive on-site signal processing and analysis, which can lead to increased complexity and maintenance efforts, and they struggle with false alarms from background radiation and mobile sources like X-ray scanners.
Innovation Solution
A method and system that utilizes a control system with identification addresses to form adaptable RPMs by selecting sets of detectors, allowing centralized signal processing and analysis, using a cross-talk matrix to manage crosstalk and background radiation, and incorporating ancillary sensors for enhanced characterization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If radiation portal monitoring systems use only one type of detector, then the device complexity is reduced, but the measurement precision and reliability of radiation source characterization deteriorates
Solution Approach 1:
The patent combines multiple types of radiation detectors (e.g., scintillation detectors, semiconductor detectors, or proportional counters) into a single monitoring system. Each detector type responds differently to various radiation types and energies, and their combined signals enable more accurate characterization of the radiation source while maintaining system integration.
Solution Approach 2:
The monitoring system is designed to perform multiple functions using a single detector array: identifying radiation type, determining energy levels, calculating activity, and characterizing source geometry. This multi-functionality allows one system to replace what would otherwise require multiple specialized devices.
2Measurement precision
If the system collects detailed radiation data for accurate source characterization, then the measurement precision improves, but the processing time and loss of time increases
Solution Approach 1:
The system pre-calculates and stores response matrices for various radiation sources and detector configurations during system initialization. When a measurement is taken, the system compares real-time detector signals against these pre-computed reference data, dramatically reducing processing time while maintaining accurate source characterization.
Solution Approach 2:
The patent replaces complex iterative computational methods with optimized algorithms and lookup tables that provide rapid source identification. The system uses pattern recognition techniques that quickly match detector signal patterns to known source signatures, minimizing processing time while preserving measurement 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
Reduces system complexity and cost by relocating signal processing to a centralized control system, enhances detection reliability through set selection and cross-talk management, and minimizes false alarms by distinguishing between legitimate radiation sources and background noise.
Implementation Method 1
a radiation portal monitoring system... acquiring first portal image data of a first radiation source... acquiring second portal image data of a second radiation source
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for characterizing a radiation source by a radiation portal monitoring system (100.4) is described, the radiation portal monitoring system comprising a plurality of detectors (112a/b-114a/b, 212a/b-214a/b) including radiation detectors configured to detect ionizing radiation of the radiation source and to generate a detection signal responsive to detection of the ionizing radiation, and a control system (3) comprising at least one processor (31) executing the steps of: assigning an identification address to each detector; selecting a set (10.5) of at least two detectors using the identification addresses; assigning an effective portal area (15) to the selected set of detectors; receiving via a communication network (2) a detection signal generated by the detectors of the selected set, using the identification addresses of the detectors of the selected set; and characterizing the radiation source associated with the effective portal area using the detection signal of the detectors of the selected set.