Vehicle X-Ray Inspection Timing Using Profile-Based Cab Positioning
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Solution Overview
Problem
Existing vehicle inspection systems face challenges in accurately determining the timing for switching the operating mode of X-ray sources due to low accuracy in speed measurement and positioning, leading to safety risks from premature or delayed emission of beams, and require extensive civil engineering and high costs for multiple sensors.
Innovation Solution
A vehicle inspection method that uses sensors to acquire vehicle profile information and determine feature points, allowing for precise switching of the X-ray source operating mode based on preset control points, reducing the need for multiple sensors and improving accuracy and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple sensors are used for speed measurement and positioning, then the accuracy of determining X-ray source mode switching timing is improved, but the equipment cost and civil engineering requirements increase
Solution Approach 1:
The patent extracts and utilizes the existing vehicle profile detection capability of the X-ray inspection system itself to determine cab position and length, rather than adding separate measurement sensors. The system processes the vehicle profile data already being collected to identify feature points (front and rear of cab) and calculates switching timing based on this extracted information.
Solution Approach 2:
The X-ray inspection system performs multiple functions: it inspects vehicle cargo while simultaneously measuring vehicle profile to determine cab position and control X-ray source switching. This multi-functionality eliminates the need for dedicated speed measurement and positioning sensors, reducing equipment complexity while maintaining timing accuracy.
2Measurement precision
If multiple sensors are deployed for vehicle monitoring, then the positioning accuracy is improved, but the space required and equipment cost increase
Solution Approach 1:
The existing X-ray inspection infrastructure is utilized for dual purposes: cargo inspection and vehicle profile measurement for cab positioning. This eliminates the need for additional sensor installations and reduces the space required for equipment deployment.
Solution Approach 2:
The system uses its own X-ray detection capability to generate vehicle profile information, which is then processed to determine cab position and control switching timing. This self-service approach eliminates dependency on external sensing systems and reduces installation space requirements.
3Productivity
If the X-ray source emits beams continuously, then the inspection efficiency is improved, but the radiation safety risk increases
Solution Approach 1:
The X-ray source operates in periodic cycles: preheating phase (low dose or no emission) when the cab is approaching and passing through, followed by normal inspection phase (full emission) after the cab has passed. This periodic operation ensures radiation safety while maintaining inspection efficiency through timely switching.
Solution Approach 2:
The system continuously monitors vehicle profile information to detect the position of cab feature points and provides feedback control for X-ray source switching. This feedback mechanism ensures beams are emitted only when safe (after cab passage) while maintaining high inspection efficiency through automated real-time control.
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 method enhances the accuracy and timeliness of X-ray source mode switching, reduces equipment costs, and improves safety by using fewer sensors and less space, while maintaining radiation protection standards.
Implementation Method 1
a first sensor that performs measurement in a direction perpendicular to a passage
Implementation Method 2
a second sensor that performs measurement a direction along the passage
Implementation Method 3
the ray source entering a normal operating state
Data Source
AI summary
This disclosure provides a vehicle inspection method, apparatus, system, and computer-readable storage medium and relates to the field of security inspection technologies. The vehicle inspection method of the present disclosure includes: acquiring vehicle profile information of a vehicle through a first sensor that performs measurement in a direction perpendicular to a passage, and determining a feature point of the vehicle according to the vehicle profile information; determining a position of the vehicle in the passage through a second sensor that performs measurement in a direction along the passage, and determining a position of the feature point according to the position of the vehicle in the passage; and switching an operating mode of a ray source based on a preset strategy according to a position relation between the position of the feature point and the ray source.