Adjustable Collimator Backscatter Imaging for Multi-Depth Detection
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Solution Overview
Problem
Existing backscatter imaging systems face challenges in adaptability, making it difficult to effectively detect objects in diverse environments and conditions.
Innovation Solution
A backscatter imaging device with adjustable collimation angles and a controller to switch between scanning modes, allowing for precise detection of multiple depths and enhanced imaging of specific areas using a distributed ray source and collimator assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed collimation angle is used in the backscatter imaging system, then the system structure is simple, but the detection adaptability to different depths and scenarios is poor
Solution Approach 1:
The patent applies the dynamics principle by making the collimation angle adjustable rather than fixed. The first collimator assembly includes multiple collimating channels with different collimation angles, and at least part of these channels have adjustable collimation angles that can be dynamically changed based on detection needs. This allows the system to adapt to different detection scenarios and depths while maintaining a relatively compact structure.
Solution Approach 2:
The patent implements parameter changes by varying the collimation angle parameter of the first collimator assembly. By adjusting the collimation angle, the system can detect scattered photons from different depth ranges within the object. The controller switches between different collimation angle configurations to optimize detection for specific depths, thereby improving detection adaptability without requiring multiple complete detector arrays.
2Measurement precision
If multiple detector arrays are used to detect scattered photons from different depths, then the detection precision is improved, but the device complexity and cost increase
Solution Approach 1:
The patent applies the universality principle by designing a single detector array that can detect scattered photons from multiple depth ranges through the use of adjustable collimation angles. The first collimator assembly with multiple collimating channels of different angles allows one detector array to perform the function that would otherwise require multiple separate detector arrays, thereby reducing system complexity and cost while maintaining depth detection precision.
Solution Approach 2:
The patent uses dynamics by making the collimation angle adjustable, allowing a single detector array to dynamically switch between detecting scattered photons from different depth ranges. This dynamic reconfiguration enables one detector array to replace multiple fixed detector arrays, achieving the same depth-resolved detection capability with reduced complexity.
3Measurement precision
If the collimation angle is adjusted to detect scattered photons from different depths, then the detection accuracy is improved, but the scanning time increases
Solution Approach 1:
The patent implements periodic action by systematically switching between different collimation angle configurations in a structured manner. The controller adjusts the collimation angle of the first collimator assembly through a series of discrete, optimized steps, each configured to detect scattered photons from specific depth ranges. This periodic switching between predetermined angle configurations allows the system to efficiently cover multiple depth ranges without requiring continuous or exhaustive angular scanning, thereby reducing total scanning time while maintaining detection accuracy.
4Measurement precision
If a pencil X-ray beam is used for backscatter imaging, then the material discrimination capability is improved, but the scanning speed decreases
Solution Approach 1:
The patent applies segmentation by dividing the detection process into multiple depth ranges, with each collimating channel configured to detect scattered photons from a specific depth range. This segmentation allows the system to process different depth information separately and efficiently, improving material discrimination capability while maintaining reasonable scanning speed through parallel processing of different depth segments.
Solution Approach 2:
The patent uses periodic action by systematically switching between different collimation angle configurations in an optimized sequence. This structured periodic switching allows the system to efficiently cover multiple depth ranges with the pencil beam, improving material discrimination through depth-resolved detection while minimizing the total time required by avoiding redundant or continuous scanning motions.
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
Enhances detection adaptability and accuracy by enabling scanning at various depths and focused imaging of suspect areas, improving the system's ability to handle different detection scenarios.
Implementation Method 1
Since rays in low atomic number substances such as explosives and drugs have stronger Compton scattering, the backscatter imaging system may distinguish materials and highlight organic substances.
Implementation Method 2
a first collimator assembly including a plurality of first collimating channels corresponding to the plurality of backscatter detectors respectively, arranged on one side of the backscatter detector array adjacent to the scanning area, and configured to align the scattered photons when the rays are backscattered by the object
Implementation Method 3
a backscatter detector array including a plurality of backscattering detectors and configured to receive scattered photons when the rays are backscattered by an object within the scanning area
Data Source
Figure 1~3
Figure 4~5
Figure 6(a)~6(c)
AI summary
The present invention relates to a backscatter imaging device, a control method and an inspection system. The backscatter imaging device comprises: a ray source assembly (10) configured to emit rays to a scanning area; a backscatter detector array (21) comprising a plurality of backscattering detectors and configured to receive scattered photons (52) when the rays are backscattered by an object (40) within the scanning area; and a first collimator assembly (22) comprising a plurality of first collimating channels (22b) corresponding to the plurality of backscatter detectors respectively, arranged on one side of the backscatter detector array (21) adjacent to the scanning area, and configured to align the scattered photons (52) when the rays are backscattered by the object (40), so that the plurality of backscatter detectors receive scattered photons (52) corresponding to a plurality of depths in the object (40) respectively; wherein at least part of the plurality of first collimation channels (22b) have an adjustable collimation angle.