High-Temperature In-Situ CT Testing System with Miniaturized X-Ray Source
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Solution Overview
Problem
Current high-temperature in-situ loaded CT testing systems face challenges with laboratory X-ray sources due to limitations in imaging accuracy, long scan durations, low Signal-to-Noise Ratio (SNR), and instability, making them less suitable for high-temperature applications compared to synchrotron sources, which are costly and complex.
Innovation Solution
A high-temperature in-situ loaded CT testing system is developed using a laboratory X-ray source with a miniaturized design, separating the loading and heating devices, and employing a radiant heating method to achieve high-accuracy CT imaging by shortening the imaging distance and improving noise reduction, allowing for up to 100 kN loading and internal damage observation in high-temperature environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If synchrotron ray sources are used for high-temperature in-situ loaded CT testing, then imaging accuracy and scanning speed are improved, but device complexity and cost increase significantly
Solution Approach 1:
The system divides the testing apparatus into separate functional modules: the loading device operates independently to apply mechanical loads, while the heating device separately controls temperature conditions. This modular segmentation allows the CT scanning system to focus solely on imaging without being burdened by integrated testing equipment, thereby achieving high imaging accuracy with a simpler, more affordable laboratory-based X-ray source rather than requiring a complex synchrotron facility.
2Device complexity
If laboratory X-ray sources are used for high-temperature in-situ loaded CT testing, then device complexity and cost are reduced, but imaging accuracy and Signal-to-Noise Ratio deteriorate due to long imaging distance
Solution Approach 1:
The patent repositions the X-ray source and detector along the imaging axis to minimize the distance between them and the specimen. By optimizing the spatial arrangement in this critical dimension, the system achieves high-resolution imaging with a compact laboratory X-ray source, effectively compensating for the typically lower beam intensity of laboratory sources compared to synchrotron sources.
3Volume of moving object
If conventional loading and heating devices are integrated, then system compactness is improved, but loading capacity is limited and cannot achieve high-load testing up to 100 kN
Solution Approach 1:
The loading device is designed as a separate, dedicated mechanical testing system that can apply high loads independently. This segmentation allows the use of robust loading mechanisms capable of withstanding forces up to 100 kN without compromising the compactness of the overall system, as the loading apparatus operates in its own spatial domain while the CT imaging system maintains its imaging optimization.
4Adaptability or versatility
If CT scanning is performed during high-temperature loading, then in-situ observation capability is achieved, but heat radiation interferes with detection accuracy
Solution Approach 1:
The system employs specialized detector shielding and filtering mechanisms that act as intermediaries between the hot specimen and the X-ray detector. These components selectively block thermal radiation while allowing X-ray signals to pass through, thereby preventing heat interference with the detection process and maintaining high measurement precision during high-temperature in-situ testing.
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 system enables high-accuracy, in-situ observation and quantitative analysis of internal damage and deformation in high-temperature materials under tensile and compressive loads, improving the feasibility and applicability of laboratory X-ray sources in high-temperature testing while reducing costs and complexity.
Implementation Method 1
a ray source and a detector respectively facing the incident window and the transmission window; the ray source emits an X-ray to irradiate the specimen through the incident window; the X-ray passes through the specimen and is received by the detector through the transmission window
Implementation Method 2
a plurality of radiant heating sources that are symmetric with respect to the imaging direction are provided in the high-temperature furnace, and are connected to the temperature control panel located outside the high-temperature furnace
Data Source
AI summary
A high-temperature in-situ loaded computed tomography (CT) testing system based on a laboratory X-ray source and a method therefor are provided. A dynamic sealing device is adopted. A pull-up pressure rod and a pull-down pressure rod are allowed to rotate circumferentially and move axially. Meanwhile, a high-temperature furnace is fixed without rotating or moving, such that the high-temperature furnace is flat in an imaging direction to shorten an imaging distance and improve imaging quality. An independent tensile testing machine is utilized to achieve high-load loading. The in-situ measurement of internal deformation and damage information of a specimen under tensile or compressive load in a high-temperature environment is implemented. By taking advantage of the miniaturization design of the high-temperature device, the accuracy of the damage test using the laboratory X-ray source is increased. Tests and researches on the internal damage and failure behavior of the high-temperature materials can be conducted.