Holographic Rock Scanning System for 3D Mechanical Parameter Acquisition
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Solution Overview
Problem
Current methods for obtaining rock mechanical and geometric parameters are either inaccurate due to complex boundary conditions or fail to provide clear images when density contrasts are weak, limiting the ability to accurately quantify meso-scale mechanical behavior in rock materials.
Innovation Solution
An automated device combining CT scanning, penetration tests, binocular stereo vision, and 3D printing to acquire rock mechanical and geometric parameters in three dimensions, using high-resolution imaging, indentation tests, rotary cutting penetration, ultrasonic sensors, and spatial interpolation algorithms to reconstruct three-dimensional mechanical parameter fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-ray CT scanning technology is used to obtain three-dimensional geometric parameters of rock materials, then the geometric parameters can be quickly obtained without damaging internal structures, but the image quality is poor when density contrast between adjacent different medium is weak and mechanical parameters cannot be obtained
Solution Approach 1:
The patent combines X-ray CT scanning technology with penetration test technology into an integrated system. The CT scanner acquires three-dimensional geometric parameters and internal structure information, while the penetration test device measures mechanical parameters such as compressive strength, elastic modulus, and Poisson's ratio. By merging these two previously separate technologies, the system simultaneously obtains both geometric and mechanical parameters without losing either type of information.
2Productivity
If rotary cutting penetration test is used to acquire rock mechanical parameters, then the test is more efficient, but the accuracy is low due to complex boundary conditions
Solution Approach 1:
The patent replaces the traditional mechanical penetration test with a digitally controlled and simulated system. The penetration test is performed under digitally controlled conditions with precisely managed boundary conditions, and numerical simulation is used to analyze the test data. This substitution of mechanical experimentation with digitally controlled and simulated measurement eliminates the accuracy problems caused by complex and uncontrolled boundary conditions while maintaining high test efficiency.
3Loss of information
If digital image technology is used to reflect meso-structure of geotechnical material, then the different medium can be classified and geometric distribution determined, but the method cannot provide mechanical parameters
Solution Approach 1:
The patent merges digital image technology with mechanical testing technology in an integrated system. The digital image processing component analyzes the meso-structure of rock materials by processing images to identify different media and their geometric distributions. Simultaneously, the penetration test component measures mechanical parameters. By combining these technologies, the system obtains both detailed meso-structure information and mechanical parameters that were previously obtained by separate methods.
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 enables rapid and accurate acquisition of rock mechanical and geometric parameters, improving the accuracy of three-dimensional microstructure imaging and mechanical property analysis, providing a more scientific method for rock mechanical property evaluation and failure analysis.
Implementation Method 1
Acquiring a pulse echo signal of the rock sample by the ultrasonic sensor excitation device and ultrasonic sensor receiving device which are symmetrically arranged on both sides of the rock sample, so as to obtain the longitudinal wave velocity Vp and transverse wave velocity Vs of the ultrasonic wave passing through the rock sample
Implementation Method 2
Dividing the upper surface of the rock sample into N1×N1 grids with high resolution (on a micro scale) by laser
Data Source
AI summary
The invention discloses a method for obtaining the geometrical and mechanical parameters of rock samples and a holographic scanning system thereof, wherein the system includes an observation mechanism, a multi-scale penetration mechanism, a grinding mechanism, a rock sample installation mechanism arranged on a three-axis precision motion platform, and an industrial computer controlling the operation mode of each mechanism of the platform Indentation/rotary penetration test, pulse echo signal acquisition, three-dimensional surface topography reconstruction, layer by layer grinding and repeated experiments are carried out. The geometric parameters and corresponding mechanical field parameters are obtained by spatial interpolation of the three-dimensional parameter lattice accumulated by several layers of single-layer rock parameters. The holographic scanning system and method can obtain the real spatial distribution of various media in rock samples. Combined with high performance numerical calculation method, it provides a more scientific method for the analysis of rock mechanical properties, failure and instability.