Fluid Pressure Loading Device for Industrial CT Scanning
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Solution Overview
Problem
Conventional industrial CT scanning systems face challenges in achieving high-resolution scans of geotechnical materials due to the need for precise sample loading and multi-directional loading capabilities, which are hindered by the size and weight of traditional loading devices, leading to low accuracy and difficulty in simulating complex stress states.
Innovation Solution
A fluid pressure loading device with a compact structure, featuring multiple fluid medium chambers and pistons that allow for real-time adjustment of forces applied to the sample, enabling multi-directional loading and precise control of loading conditions within the industrial CT scanning system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional loading device is used to apply load to the sample, then the loading function is achieved, but the device has large volume and weight making it difficult to place inside the CT machine
Solution Approach 1:
The patent employs a hydraulic loading device that uses fluid pressure to generate loading forces. The hydraulic system replaces traditional mechanical loading mechanisms, enabling compact design while maintaining sufficient loading capacity. The hydraulic cylinder with piston structure allows force application through fluid pressure rather than mechanical linkages, significantly reducing the device volume and weight for placement within the CT scanning space.
2Measurement precision
If the sample size is increased to avoid dimensional effects in geotechnical materials, then the representativeness of the sample is improved, but the X-ray penetration ability decreases and image resolution deteriorates
Solution Approach 1:
The patent implements a multi-axis loading system with adjustable loading directions and magnitudes. This dynamic loading capability allows optimization of the stress state during scanning, enabling accurate mechanical testing of appropriately sized samples without requiring oversized specimens. The system can apply complex stress states that better represent actual geotechnical conditions while maintaining sample dimensions suitable for X-ray penetration and high-resolution imaging.
3Volume of moving object
If a compact fluid pressure loading device is used, then the device volume is reduced for CT placement, but the capability for multi-directional and complex loading is limited
Solution Approach 1:
The patent designs a multi-functional loading device that can perform uniaxial compression, triaxial compression, and true triaxial compression tests. The device incorporates multiple loading chambers and pistons that can independently apply forces in different directions. This universal design allows a single compact device to replace multiple specialized loading apparatus, providing versatile loading capabilities while maintaining a size suitable for CT scanning applications.
4Ease of manufacture
If loading is performed outside the CT machine and then the sample is placed on the test bed, then the loading accuracy is reduced and the load becomes non-adjustable
Solution Approach 1:
The patent integrates the loading device directly with the CT scanning system, merging two previously separate functions into a single unified system. The loading apparatus is positioned within the CT scanning space and can be controlled during the scanning process. This integration allows real-time adjustment of loading conditions while the sample is being scanned, ensuring both high loading accuracy and the ability to modify load parameters dynamically during experimentation.
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 achieves improved simulation accuracy and efficiency by allowing real-time loading and multi-directional loading of samples, accommodating complex loading experiments and maintaining high-resolution imaging capabilities.
Implementation Method 1
one chamber is in communication with an external hydraulic medium via oil lines provided in the body
Data Source
AI summary
A fluid pressure loading device applied to an industrial computed tomography scanning test system includes a body, a sample accommodating chamber and at least one fluid medium chamber being provided in the body. Each of the at least one fluid medium chamber is provided therein with a piston, the corresponding fluid medium chamber is separated into two chambers by the piston, one of the two chambers is in communication with an external hydraulic medium via oil lines provided in the body, the other of the two chambers is in communication with the sample accommodating chamber, and one end, facing towards the sample accommodating chamber, of the piston is extendable into the sample accommodating chamber. With the loading device, real-time loading of a test sample can be realized, thus improving a simulation accuracy of the system, and multi-directional loading of the sample can be realized.