Accelerator Beam Frequency Control for Train Security Inspection
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Solution Overview
Problem
Existing security inspection systems using accelerators face challenges in controlling beam frequency to prevent image deformation during vehicle movement, ensuring safety from radiation, gradually increasing dose, and determining real-time air values for accurate imaging.
Innovation Solution
A method and system that adjust the beam-emitting frequency of the accelerator using the formula f = vKb / ad, where a, b, v, d, and K represent specific distances and parameters, and include modules for speed measurement, frequency adjustment, and air value acquisition to match beam frequency with train speed and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the accelerator beam-emitting frequency is not synchronized with vehicle speed, then the scanning process is simple, but the scanned image becomes deformed and inspection accuracy decreases
Solution Approach 1:
The beam-emitting frequency of the accelerator is made dynamically adjustable based on real-time vehicle speed measurements. The system continuously adapts the frequency parameter to match changing vehicle speeds, ensuring image quality is maintained throughout the scanning process without requiring a completely complex control system.
Solution Approach 2:
The system implements a feedback mechanism where the vehicle speed is measured in real-time and this information is used to adjust the beam-emitting frequency. This closed-loop control ensures that the frequency is automatically synchronized with the vehicle speed, preventing image deformation while maintaining system simplicity.
2Productivity
If the accelerator emits beam continuously during vehicle passage, then the scanning speed is high, but persons on the train may be exposed to harmful radiation
Solution Approach 1:
Instead of continuous beam emission, the system uses periodic beam emission synchronized with the vehicle's position. The accelerator emits beams at specific intervals when the vehicle is in safe positions, maintaining high scanning productivity while minimizing radiation exposure to persons on the train through pulsed rather than continuous operation.
3Measurement precision
If the beam-emitting frequency is adjusted according to vehicle speed, then image quality is improved, but the control system complexity increases
Solution Approach 1:
The system adjusts the beam-emitting frequency parameter based on measured vehicle speed to maintain inspection accuracy. By focusing on changing this single critical parameter rather than overhauling the entire control system, the patent achieves improved measurement precision while minimizing the increase in overall system complexity.
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 solution ensures accurate and high-quality security inspections by synchronizing beam frequency with train speed, ensuring safety, and optimizing air value acquisition for improved image processing efficiency.
Implementation Method 1
An accelerator is a ray source which generates X-rays by utilizing a magnetic field or an electric field to accelerate electrons shooting a target
Implementation Method 2
Accelerators are widely applied in security systems, especially in systems for inspecting large containers. Since they have high energy, excellent penetrating effects
Data Source
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AI summary
The present disclosure relates to a method and a system for security inspection. A method for security inspection, for performing security inspection on a train with a scanning device including an accelerator and a detector. The method for security inspection includes: measuring (S202) a moving speed of the train with respect to the scanning device; and adjusting (S204) a beam-emitting frequency of the accelerator according to the moving speed. According to the method of the present disclosure, the beam-emitting frequency can be controlled in real time, and the quality of images can be improved.