In-situ NMR Noise Cancellation via Auxiliary Detection
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Solution Overview
Problem
Existing in-situ NMR devices face challenges in effectively canceling Radio Frequency (RF) or other Electromagnetic (EM) noise, which degrades NMR signal quality, especially in noisy environments such as near-surface applications where electromagnetic noise is prevalent and shielding is inadequate.
Innovation Solution
The proposed solution involves a noise canceling in-situ NMR detection apparatus that includes a static magnetic field generator, an alternating magnetic field generator, an in-situ NMR detection device, and an auxiliary noise detection device, with a computer configured to control these components and subtract noise measurement information from NMR measurement information, using noise canceling designs such as dual induction coils with opposite phases to attenuate noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If in-situ NMR detection is performed in noisy electromagnetic environments, then NMR measurement capability is achieved, but electromagnetic noise degrades signal quality
Solution Approach 1:
The detection system is segmented into multiple functional components: primary NMR detection coils, noise detection coils, and signal processing units. This segmentation allows separate detection of NMR signals and electromagnetic noise, enabling independent analysis and cancellation of noise from the NMR signal to improve measurement precision in noisy environments
Solution Approach 2:
Noise detection coils serve as intermediary elements that specifically detect electromagnetic noise without detecting NMR signals. These intermediary detectors enable the system to identify and cancel noise components before they degrade the NMR measurement quality
2Object-affected harmful factors
If noise canceling designs are implemented, then electromagnetic noise is attenuated, but device complexity increases
Solution Approach 1:
The system merges noise detection and NMR signal detection into a unified detection apparatus with integrated signal processing. By combining these functions in a single system with shared power supply and control electronics, the patent reduces overall device complexity while maintaining effective noise cancellation capability
Solution Approach 2:
The detection apparatus is designed with multi-functional components that can operate in different modes. The same detection system can perform both NMR signal detection and electromagnetic noise detection, eliminating the need for completely separate systems and reducing overall device complexity
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 significantly reduces electromagnetic noise interference, enhancing the quality of NMR measurement data by isolating NMR signals from noise, thereby improving the accuracy of NMR measurements in noisy environments.
Implementation Method 1
a static magnetic field generator
Implementation Method 2
an alternating magnetic field generator
Implementation Method 3
an in-situ NMR detection device
Implementation Method 4
using noise canceling designs such as dual induction coils with opposite phases to attenuate noise
Data Source
AI summary
Technologies applicable to noise canceling in-situ NMR detection and imaging are disclosed. An example noise canceling in-situ NMR detection apparatus may comprise one or more of a static magnetic field generator, an alternating magnetic field generator, an in-situ NMR detection device, an auxiliary noise detection device, and a computer.