Multi-Wavelength Scintillator Detector for Cargo Inspection
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Solution Overview
Problem
Existing cargo inspection systems using inspection radiation often suffer from suboptimal resolution and contrast in images derived from signals, despite generating large detection signals.
Innovation Solution
A scanning apparatus comprising multiple scintillators and sensors that re-emit light in different wavelength domains, allowing for increased resolution and contrast by measuring energy deposition specifically at the first scintillator's area, while the second scintillator provides better contrast with a larger exposed area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single large-area scintillator is used to increase signal size, then detection signal strength is improved, but image resolution deteriorates
Solution Approach 1:
The detector is divided into multiple scintillator elements (first scintillator, second scintillator, third scintillator) with different area sizes. Each scintillator element processes a portion of the radiation signal, allowing the system to aggregate signals from multiple elements to achieve both high signal strength and high resolution through pixelated detection architecture.
2Measurement precision
If multiple scintillators with different areas are used, then both signal strength and resolution can be optimized, but device complexity increases
Solution Approach 1:
Different scintillator elements are assigned different area sizes based on their specific function: larger scintillators (second scintillator) for high signal detection in regions requiring sensitivity, smaller scintillators (first and third scintillators) for high-resolution imaging. This local optimization allows each element to be tailored to its detection needs while maintaining overall system simplicity through modular design.
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
The solution enhances image resolution in specific directions and improves contrast, enabling more effective detection of concealed objects within cargo by optimizing the measurement of energy deposition and light sensitivity.
Implementation Method 1
at least one first scintillator (3) configured to, in response to interaction with a pulse (5) of inspection radiation, re-emit first light (6) in a first wavelength domain
Implementation Method 2
at least one second scintillator (4) configured to, in response to interaction with the pulse (5) of inspection radiation, re-emit second light (7) in a second wavelength domain different from the first wavelength domain
Implementation Method 3
at least one first sensor (8) configured to measure the first light (6) and not the second light (7)
Data Source
Figure 1A~1B
Figure 2
Figure 3A~4B
AI summary
In one embodiment, there is provided detector (1) for an inspection system, comprising: at least one first scintillator (3) configured to, in response to interaction with a pulse (5) of inspection radiation, re-emit first light (6) in a first wavelength domain; at least one second scintillator (4) configured to, in response to interaction with the pulse (5) of inspection radiation, re-emit second light (7) in a second wavelength domain different from the first wavelength domain; and at least one first sensor (8) configured to measure the first light (6) and not the second light (7).