Variable Frequency Scanning for Moving Target Inspection
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Solution Overview
Problem
Existing vehicle inspection systems are inefficient due to long inspection times, high costs, and low throughput when scanning moving targets at inhomogeneous speeds, requiring drivers and passengers to exit the vehicle and using constant scanning frequencies.
Innovation Solution
An apparatus and method that dynamically adjust scanning and imaging frequencies based on the speed and type of the moving target, using ground sensing coils, quick-responsive measuring light screens, and a control unit to ensure efficient inspection without radiation exposure to operators, allowing for 100% inspection ratio and increased throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If constant frequency scanning is used, then the scanning process is simple, but the inspection time is long and inspection efficiency is low
Solution Approach 1:
The patent applies dynamics by transitioning from constant frequency scanning to variable frequency scanning. The scanning frequency is dynamically adjusted based on the vehicle's speed and position, with higher frequencies used when the vehicle is stationary or moving slowly, and lower frequencies used when the vehicle moves faster. This dynamic adaptation resolves the contradiction by maintaining simple scanning control while significantly improving inspection efficiency through intelligent frequency modulation.
Solution Approach 2:
The patent changes the scanning frequency parameter from a fixed value to a variable value that adapts to different inspection conditions. By modifying the scanning frequency parameter based on vehicle speed, position, and type, the system achieves both operational simplicity and high inspection efficiency, resolving the technical contradiction between process simplicity and productivity.
2Ease of operation
If constant frequency scanning is used, then the apparatus operation is simple, but the inspection time is several minutes and throughput is low
Solution Approach 1:
The patent implements feedback control by continuously monitoring vehicle speed, position, and type, then using this information to adjust scanning frequency in real-time. The system receives feedback about the vehicle's movement characteristics and automatically modulates the scanning frequency to optimize inspection time while maintaining operational simplicity, thereby reducing inspection time from several minutes to much shorter durations.
Solution Approach 2:
The system performs preliminary detection of vehicle characteristics (speed, position, type) before initiating the scanning process. By preparing the scanning parameters in advance based on pre-detected vehicle information, the apparatus can quickly adjust its operation mode, reducing inspection time while keeping the operation interface simple for users.
3Measurement precision
If high energy radiation scanning is used, then imaging quality is good, but the apparatus cost is high and operator safety is compromised
Solution Approach 1:
The patent changes the radiation energy parameter dynamically based on inspection needs. Instead of using constant high energy radiation, the system adjusts the radiation energy level according to vehicle type, speed, and scanning stage. This parameter modulation allows the system to maintain good imaging quality while reducing overall radiation exposure and apparatus cost, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent applies partial action by using high energy radiation only when and where necessary, rather than continuously. The system selectively applies high energy scanning for specific vehicle parts or when quality inspection is critical, while using lower energy modes for routine scanning, thereby reducing overall apparatus cost and improving operator safety while maintaining adequate imaging quality.
4Measurement precision
If high energy radiation scanning is used, then imaging quality is good, but operator safety is compromised due to radiation exposure
Solution Approach 1:
The patent reduces radiation exposure by dynamically changing the radiation energy parameter. The system uses lower radiation energy levels during most scanning operations and reserves high energy radiation for specific critical inspections. This parameter modulation significantly reduces cumulative radiation exposure to operators while maintaining adequate imaging quality for inspection purposes.
Solution Approach 2:
The patent applies the skipping principle by rapidly moving through the scanning process using variable frequency scanning. The system quickly scans through vehicle components at optimized speeds, reducing the total time radiation sources are active and thereby minimizing operator exposure. The rapid scanning approach allows quality inspection to be completed faster with reduced radiation cumulative dose.
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
Significantly reduces inspection time, increases vehicle throughput, and lowers apparatus costs while ensuring operator safety and efficient radiation use, capable of inspecting over 200 container lorries per hour without requiring drivers and passengers to exit the vehicle.
Implementation Method 1
an accelerator for scanning and imaging the moving target at a variable frequency
Implementation Method 2
a detector for detecting radiation beam scattered from the moving target
Data Source
Figure 1~2
Figure 3
AI summary
An apparatus for quick imaging and inspecting a moving target, comprises: a passage for the moving target passing therethrough, a scanning and imaging device irradiating radiation beam to the moving target passing through the passage to form an image thereof for inspection, a first determination unit for determining whether the moving target has entered the passage and for counting the moving target entering the passage, a second determination unit for determining the moving speed of the moving target in the passage; and a control unit for controlling the second determination unit to determine the moving speed of the moving target based on the detection signal from the first determination unit indicating the moving target having entered the passage, and for controlling the scanning and imaging device to irradiate radiation beam for the inspection of the moving target with a frequency corresponding to the moving speed of the moving target based on the determination result of the second determination unit.