Layered Protective Covers for Safe NMR Probe Adjustment
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Solution Overview
Problem
Nuclear magnetic resonance (NMR) apparatuses with strong magnetic field generators face issues of metal attraction and precision instrument malfunction due to the strong magnetic fields, posing risks to operators during probe adjustments.
Innovation Solution
The NMR apparatus incorporates a magnetic field generator with protective covers and a probe adjuster positioned outside the strong magnetic field area, allowing safe adjustment of the probe characteristics without direct operator exposure to high magnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a magnetic field generator that generates a strong magnetic field is provided to improve sensitivity and resolution, then sensitivity and resolution are improved, but metal objects may be attracted and precision instruments may malfunction
Solution Approach 1:
The protective cover structure is segmented into multiple levels: an inner protective cover surrounding the strong magnetic field region and an outer protective cover surrounding a larger area including the inner cover and the probe adjuster. This segmentation allows different regions to have different protection requirements, enabling the probe adjuster to be positioned in a safer zone while maintaining the strong magnetic field where needed for signal detection.
Solution Approach 2:
The protective covers act as intermediary barriers between the strong magnetic field generator and the operator/probe adjuster. By introducing these intermediate protective structures, the harmful magnetic field effects are contained within the inner cover region, while the outer cover and opening provide a safe interface for operator interaction with the probe adjuster.
2Device complexity
If the probe adjuster is positioned inside the strong magnetic field area to simplify structure, then device complexity is reduced, but operator safety and instrument reliability deteriorate
Solution Approach 1:
The solution transitions from a two-dimensional placement problem to a three-dimensional spatial arrangement. By utilizing vertical stacking of protective covers and creating a layered structure with inner and outer covers, the probe adjuster can be positioned in a safe zone (outside the inner cover) while maintaining efficient structural integration. This dimensional approach resolves the conflict between simplicity and safety.
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
Prevents metal attraction and precision instrument interference, ensuring safe and accurate probe tuning while maintaining high sensitivity and resolution.
Implementation Method 1
a magnetic field generator that generates a magnetic field
Implementation Method 2
Nuclear magnetic resonance is a phenomenon in which, when an electromagnetic wave is emitted from outside at an atomic nucleus to which a magnetic field is applied, the atomic nucleus absorbs a specific electromagnetic wave corresponding to each chemical environment
Data Source
AI summary
A nuclear magnetic resonance apparatus including a magnetic field generator generating a magnetic field, a sample container held in the generated magnetic field and containing a sample to be analyzed, a probe that emits an electromagnetic wave at the sample and detects a nuclear magnetic resonance signal from the sample, a first protective cover surrounding a space where a strength of the generated magnetic field is equal to or greater than a first threshold, a second protective cover mounted outside the first protective cover and surrounding a space where the strength of the generated magnetic field is equal to or greater than a second threshold is weaker than the first threshold, an opening provided in the second protective cover, and a probe adjuster disposed outside the first protective cover and inside the second protective cover in vicinity of the opening to adjust a characteristic of the probe by an operator.