Multi-Standard CT Calibration Gauge via Segmented Substrates
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Solution Overview
Problem
X-ray computed tomography (CT) devices require accurate calibration to ensure precise measurements, but existing calibration methods lack versatility and standard compliance, leading to potential inaccuracies in dimensional verification of work pieces.
Innovation Solution
A gauge system comprising two planar substrates with precisely positioned and certified objects, allowing calibration and verification using multiple standards, such as VDI/VDE, ISO, ASME, and ASNT, by coupling substrates to form a multi-standard calibration tool that enhances measurement accuracy and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing calibration methods are used for CT devices, then calibration can be performed, but measurement precision and standard compliance are insufficient
Solution Approach 1:
The calibration gauge is divided into multiple substrates, each carrying specific certified objects that comply with different measurement standards. This segmentation allows the system to simultaneously support multiple standards while maintaining high measurement precision for each standard through dedicated certified reference objects.
Solution Approach 2:
The calibration gauge system is designed to be universal by incorporating certified objects on substrates that comply with multiple measurement standards (VDI/VDE, ISO, ASME, ASNT). This multi-functionality enables a single gauge system to serve various calibration needs across different standards, improving both precision and standard compliance simultaneously.
2Adaptability or versatility
If existing calibration gauges are used, then calibration is possible, but versatility across multiple measurement standards is limited
Solution Approach 1:
The calibration gauge incorporates certified objects that comply with multiple measurement standards (VDI/VDE 2634, ISO 10360, ASME V&V 100, ASNT SNT-TC-1A), enabling the single system to serve various calibration needs across different standards while maintaining the measurement precision required by each standard through certified reference objects.
Solution Approach 2:
The system transitions from single-standard calibration to multi-standard calibration by adding the dimension of standard compliance diversity. Multiple substrates with different certified objects enable calibration across various measurement standards without compromising the precision requirements of any individual standard.
3Measurement precision
If multiple substrates with certified objects are used, then calibration accuracy and standard compliance improve, but device complexity increases
Solution Approach 1:
The calibration gauge is segmented into multiple substrates, each carrying specific certified objects for different measurement standards. This segmentation organizes the complexity into manageable modules, where each substrate can be independently characterized and certified, making the overall complex system more controllable and maintainable while achieving high calibration accuracy across multiple standards.
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
The gauge system enables accurate calibration and verification of CT devices, ensuring precise measurements and compliance with various standards, thereby reducing measurement errors and improving the reliability of CT systems.
Implementation Method 1
x-ray computed tomography device positions a gauge within an x-ray computed tomography device. The gauge has a first plurality of certified objects on a first substrate and a second plurality of certified objects on a second substrate.
Implementation Method 2
the method images the gauge to form a three-dimensional model representing the gauge
Implementation Method 3
To effectively perform their respective functions, the first and second pluralities of objects are visible to x-rays and each have an object attenuation value to x-rays. In various embodiments, the objects may include precision ground or lapped objects (e.g., ruby or sapphire spheres). In a manner similar to the objects, the first and second substrates each also have a base attenuation value to x-rays.
Data Source
AI summary
A method of making a gauge for verifying or calibrating an x-ray computed tomography device positions a first plurality of objects on a first substrate, and a second plurality of objects on a second substrate. The method also certifies the positions of both the first plurality of objects on the first substrate, and the second plurality of objects on the second substrate. After certifying both the first and second plurality of objects, the method couples the first substrate with the second substrate.