Tessellating Semi-Halbach Stators for Parallel NMR Analysis
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Solution Overview
Problem
Current NMR devices for rock core analysis are limited by their inability to analyze multiple samples in parallel due to low duty cycle requirements and long repolarization times, making them inefficient for analyzing fluid and rock samples from subsurface formations.
Innovation Solution
The use of semi-Halbach magnet arrays that produce a magnetic field both inside and outside the array, allowing for simultaneous analysis of multiple samples and enabling the creation of a 'sweet spot' for efficient NMR measurements, along with a system that includes RF circuits, electronics, and processing units for data analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional NMR devices are used to analyze rock core samples, then measurement accuracy is maintained, but productivity is low due to sequential analysis of single samples
Solution Approach 1:
The patent divides the NMR measurement system into multiple independent magnet arrays, each capable of analyzing one or more samples simultaneously. This segmentation allows parallel processing of multiple samples, transforming a sequential single-sample analysis system into a multi-sample parallel analysis system, thereby dramatically improving productivity while maintaining measurement accuracy for each sample
Solution Approach 2:
The patent transitions from a single measurement dimension (one sample at a time) to multiple measurement dimensions by arranging multiple samples in spatial arrays within the magnetic field. Each sample occupies a distinct spatial position with its own sweet spot, enabling simultaneous multi-dimensional measurements that overcome the time loss associated with sequential repolarization
2Measurement precision
If magnetic field strength is increased for better NMR signal, then measurement precision improves, but device complexity increases due to requirement for superconducting coils
Solution Approach 1:
The patent uses arrays of permanent magnets arranged in specific geometric patterns to replicate and distribute the magnetic field across multiple spatial locations. Instead of using a single complex superconducting coil system, multiple simpler magnet arrays are deployed, each creating a localized sweet spot that copies the essential magnetic field characteristics needed for high-precision NMR measurements
Solution Approach 2:
The patent changes the magnetic field configuration from a single high-intensity field requiring superconducting coils to multiple lower-intensity fields with optimized spatial distribution. By adjusting parameters such as magnet arrangement geometry, spacing, and orientation, the system achieves sufficient field strength at multiple sweet spots using permanent magnets, thereby reducing device complexity while maintaining measurement precision
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 the simultaneous analysis of multiple samples, increasing efficiency and reducing the need for sequential measurements, thereby improving the analysis of fluid and rock samples from subsurface formations.
Implementation Method 1
The semi-Halbach configuration produces a magnetic field both inside and outside the array
Implementation Method 2
Each magnet array comprises a plurality of magnets arranged in a semi-Halbach configuration
Implementation Method 3
Nuclear magnetic resonance (NMR) is a powerful tool for analysis of rock core samples
Data Source
AI summary
A device including a plurality of motors is disclosed. The device includes a body comprising a plurality of magnet arrays. Each magnet array comprises a plurality of magnets which define a polygon and the plurality of magnets are arranged in a semi-Halbach configuration. The polygons of the plurality of magnet arrays form a tessellating pattern in which the magnet arrays each share at least one magnet with another one of the magnet arrays. Each magnet is configured to be rotatable relative to the body, or in the case of coils as magnets, the input of each coil can be manipulated to replicate the same or similar effect. The device further comprises a plurality of rotors, wherein each magnet array is configured to receive a rotor rotatable relative to the body.