Photon-Counting X-Ray Threshold Correction for Changing Articles
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Solution Overview
Problem
Existing X-ray inspection apparatuses fail to achieve satisfactory inspection performance when the article being inspected changes, due to inadequate sensitivity correction and threshold value setting.
Innovation Solution
The X-ray inspection apparatus includes a conveying unit, X-ray source, detection unit, threshold value setting unit, and sensitivity correction unit, which perform sensitivity correction based on the type of the article and adjust threshold values using X-ray transmission images, ensuring accurate discrimination of X-rays into multiple energy regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If energy threshold values stored in advance corresponding to physical properties of articles are used, then the device structure is simple, but inspection performance is not fully achieved when articles change
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the energy threshold values based on the specific article being inspected. Instead of using fixed predetermined threshold values, the system modifies these parameters according to the physical properties of each article type, thereby maintaining high inspection performance across different article variations without requiring complete redesign of the detection system
Solution Approach 2:
The patent implements dynamics by making the threshold value setting adaptable and changeable based on inspection requirements. The system transitions from static predetermined thresholds to dynamic thresholds that can be adjusted in real-time according to the article being inspected, allowing the inspection apparatus to optimize its performance for different inspection scenarios
2Measurement precision
If sensitivity correction is not performed when threshold value changes, then the operation is simple, but inspection accuracy deteriorates
Solution Approach 1:
The patent applies feedback by implementing sensitivity correction procedures that automatically adjust detection parameters based on threshold value changes. When threshold values are modified, the system performs sensitivity correction to recalibrate the detection unit, ensuring that measurement accuracy is maintained throughout operation without requiring manual intervention for each parameter adjustment
Solution Approach 2:
The patent implements preliminary action by performing sensitivity correction in advance when threshold values are changed. Rather than waiting for accuracy degradation to occur, the system proactively adjusts sensitivity parameters before inspections begin, ensuring optimal detection accuracy is established beforehand for each new threshold configuration
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 approach ensures consistent and satisfactory inspection performance by adapting to changes in the inspected article, maintaining accuracy through sensitivity correction and appropriate threshold value setting.
Implementation Method 1
an X-ray source configured to irradiate the article being conveyed by the conveying unit with X-rays
Implementation Method 2
a detection unit configured to detect the X-rays by photon counting
Data Source
AI summary
An X-ray inspection apparatus includes a conveying unit configured to convey an article, an X-ray source configured to irradiate the article with X-rays, a detection unit configured to detect the X-rays by photon counting, a threshold value setting unit configured to set a threshold value for discriminating the X-rays, an inspection unit configured to inspect the article on the basis of the X-rays transmitted through the article, the X-rays being detected by the detection unit, and a sensitivity correction unit configured to perform sensitivity correction of the detection unit on the basis of the X-rays not transmitted through the article, the detection unit is configured to discriminate and detect the X-rays into the two or more energy regions by using the threshold value, and the sensitivity correction unit is configured to perform the sensitivity correction when the threshold value setting unit changes the threshold value.