Vehicle Inspection Imaging for Radiation Dose Avoidance
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Solution Overview
Problem
Existing vehicle inspection systems using multiple sets of light curtains or area laser sensors occupy a large area, incur high costs, and suffer from inaccuracies in speed measurement and cab length data, particularly for vehicles with obstructions like air conditioners or low reflectivity, affecting the accuracy of radiation dose avoidance.
Innovation Solution
A vehicle inspection method and system that utilizes optical image recognition to determine vehicle type and radiation dose limited areas, adjusting scanning strategies based on vehicle type and position to improve accuracy and reduce system size and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sets of light curtains or area laser sensors are used to detect vehicle type and dimensions, then the inspection system can identify vehicles, but the system occupies a large area, involves extensive civil engineering, and incurs high costs
Solution Approach 1:
The patent merges the vehicle detection function into the existing radiation scanning system by using the scanning device itself to capture images of the vehicle. This eliminates the need for separate light curtains or area laser sensors, thereby reducing the occupied area and civil engineering requirements while maintaining vehicle type detection capability.
Solution Approach 2:
The radiation scanning device is made multi-functional by enabling it to perform both radiation scanning and vehicle image capture. This allows the same device to serve multiple purposes: inspecting cargo contents via radiation and identifying vehicle type/dimensions via captured images, thus eliminating dedicated detection equipment.
2Measurement precision
If multiple area laser scanners are used to acquire depth data and draw gray scale images for vehicle recognition, then vehicle type and cab length data can be obtained, but the speed measurement accuracy impacts the avoidance opportunity accuracy
Solution Approach 1:
The patent introduces an image processing module as an intermediary that processes images captured by the radiation scanning device. This module extracts vehicle dimension information through image analysis rather than relying on speed measurement from laser scanners, thereby improving the accuracy of avoidance opportunity determination.
Solution Approach 2:
The patent replaces the mechanical measurement system (area laser scanners measuring depth and calculating dimensions) with an optical/image-based system. The radiation scanning device captures images, and image processing algorithms extract vehicle dimensions, eliminating the chain of errors from speed measurement to dimension calculation.
3Extent of automation
If vehicle recognition algorithms process images to obtain cab length data, then avoidance signals can be generated, but special vehicle types with air conditioners or low reflectivity cannot have accurate cab length data obtained
Solution Approach 1:
The patent employs multiple image processing parameters and algorithms to adapt to different vehicle types. By adjusting processing parameters such as contrast enhancement, edge detection thresholds, and feature recognition criteria, the system can accurately identify cab length for special vehicles with air conditioners or low reflectivity that would confuse standard algorithms.
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 the accuracy of radiation dose avoidance by accurately determining vehicle dimensions and optimizing scanning strategies, reducing the need for extensive civil engineering and costs while ensuring safe radiation exposure levels.
Implementation Method 1
a radiation scanning device configured to scan a vehicle passing through an inspection area in the inspection passage through radiation emitted by the radiation source and obtain an inspection result through a detection signal received by the detector
Implementation Method 2
a vision device configured to obtain an external optical image of the vehicle that has entered the inspection passage
Data Source
Figure 1~3
Figure 4~6B
Figure 6C~8
AI summary
The present disclosure relates to a vehicle inspection method, system and a storage medium. The vehicle inspection method for performing radiation inspection on a vehicle passing through an inspection passage by a radiation scanning device (30) includes: recognizing an external optical image of the vehicle that has entered the inspection passage to determine a type of the vehicle and a size of a radiation dose limited area of the vehicle; selecting a scanning strategy of the radiation scanning device (30) for the vehicle according to the type of the vehicle, and switching a working mode of the radiation scanning device (30) according to the size of the radiation dose limited area of the vehicle and a traveling position of the vehicle.