Electromagnetic X-ray Scanning for Adaptive Beam Control
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Solution Overview
Problem
Existing x-ray inspection systems face inefficiencies due to mechanical limitations in adjusting beam parameters during inspections, leading to suboptimal image quality for varying vehicle heights, speeds, and distances, resulting in under-sampling or oversampling and wastage of beam energy.
Innovation Solution
An electromagnetic x-ray scanning system with a variable snout length and aperture, capable of electronically steering the electron beam to adjust the x-ray beam direction and shape in real-time, allowing for optimal scanning across a range of vehicle dimensions and speeds without mechanical changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical means are used to create and scan x-ray beams, then the system structure is simple and reliable, but the beam parameters cannot be adjusted in real-time, resulting in suboptimal image quality for varying vehicle conditions
Solution Approach 1:
The patent replaces mechanical scanning means with electromagnetic means to steer and focus the electron beam. Electromagnetic coils generate magnetic fields that deflect the electron beam to scan across the anode, eliminating the need for mechanical moving parts while enabling real-time parameter adjustment. This substitution provides both adaptability and simplified mechanical structure.
Solution Approach 2:
The patent implements dynamic adjustment of beam parameters including intensity, spot size, and scanning speed through electronic control. The electron beam parameters can be varied during the course of a single scan to optimize image quality for different vehicle conditions, transforming a static system into a dynamically adaptable one.
2Measurement precision
If fixed beam parameters are used for scanning, then the system operation is simple, but image quality becomes suboptimal for vehicles of different heights, speeds, and distances
Solution Approach 1:
The system incorporates feedback mechanisms that detect vehicle conditions (height, speed, distance) and automatically adjust beam parameters accordingly. This closed-loop control maintains optimal image quality across varying conditions without requiring manual intervention, preserving operational simplicity while enhancing measurement precision.
Solution Approach 2:
The patent changes physical parameters of the electron beam including intensity, spot size, and scanning speed to optimize x-ray image quality. These parameter adjustments are made in response to detected vehicle conditions, enabling the system to maintain high measurement precision across different operational scenarios.
3Use of energy by moving object
If mechanical scanners are used with fixed parameters, then the device structure is straightforward, but energy is wasted due to under-sampling or oversampling
Solution Approach 1:
The system dynamically adjusts electron beam parameters including intensity and scanning speed to match the actual inspection requirements. This prevents both under-sampling (wasting energy on excessive scans) and oversampling (insufficient data collection), optimizing energy utilization efficiency through real-time parameter adaptation.
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
Enables efficient, real-time adjustment of x-ray beam parameters to achieve optimal image quality and energy utilization across different vehicle sizes and speeds, reducing gaps and overlaps in scanning, and improving signal-to-noise ratios.
Implementation Method 1
an electromagnetic scanner for sweeping an electron beam emitted by an x-ray tube across a reaction anode thereby producing an x-ray beam whose propagation direction varies as a function of time
Implementation Method 2
sweeping an electron beam emitted by an x-ray tube across a reaction anode thereby producing an x-ray beam
Implementation Method 3
The x-rays that are backscattered by Compton interactions in the target vehicle 108 are detected by large-area backscatter detectors
Data Source
AI summary
Methods and an x-ray source for sweeping an x-ray beam across an object of inspection. A beam of electrons is emitted by a cathode, while a sweep controller applies a signal to a beam controller in a prescribed path on an anode, thereby causing an x-ray beam to be emitted from an aperture disposed at one apex of a snout of variable length. The aperture may be a Rommel aperture that allows for forming a scanning x-ray of desired size and flux independently of the angle at which the beam is emitted. Scanning rate may be varied during the course of a scan. Multiple x-ray beams may be formed simultaneously, where one beam is inside a conveyance while the other is outside the conveyance, for example.