NMR Probe Gas Stream Sample Tube Conveyance
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Solution Overview
Problem
Conventional NMR probes face challenges in maintaining sample tube integrity and efficiency during exchange, with issues of wear and damage due to manual handling and mechanical stress, leading to decreased performance and accuracy in NMR measurements.
Innovation Solution
An NMR probe design that allows sample tube insertion and withdrawal while mounted in a magnetic field generator, utilizing a gas stream generator positioned in the sample tube passage to gently convey the sample tube between the insertion port and support, reducing mechanical stress and wear by controlling the flow rate and direction conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual mounting and detaching of MAS probe is performed for sample exchange, then sample tube can be exchanged, but human errors occur and measurement efficiency deteriorates
Solution Approach 1:
The system enables automatic sample tube insertion and ejection through gas stream generation, allowing the apparatus to service itself without manual intervention. The gas stream generator automatically conveys sample tubes between the insertion port and support, eliminating the need for manual probe mounting and detaching.
Solution Approach 2:
Manual mechanical operations of mounting and detaching the MAS probe are replaced by an automated gas stream-based conveyance system. The gas stream generator creates controlled gas flows to transport sample tubes, substituting human hands and mechanical manipulation with a non-contact pneumatic system.
2Speed
If sample tube is conveyed by strong gas stream, then ejection speed increases, but sample tube and probe components suffer damage and wear
Solution Approach 1:
The gas stream generation is made dynamic and controllable, allowing the system to adjust gas flow strength based on operational requirements. The gas stream generator can vary the intensity of gas streams to achieve optimal ejection speed while preventing excessive force that would cause damage to sample tubes and probe components.
Solution Approach 2:
The system uses controlled pneumatic gas streams to convey sample tubes instead of direct mechanical contact. By regulating gas pressure and flow rate, the system achieves smooth acceleration and deceleration of sample tubes, reducing impact forces and mechanical wear while maintaining efficient ejection speeds.
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
Enables stable and repetitive sample exchange over long periods, minimizing damage to the sample tube and probe components, maintaining measurement accuracy and extending the lifespan of the probe.
Implementation Method 1
a gas stream generator for producing a gas stream in the sample tube passage to convey the sample tube between the sample tube insertion port and the sample tube support
Data Source
AI summary
An NMR probe has a sample tube insertion port for introducing and withdrawing the sample tube into and from the probe, a sample tube support providing support of the sample tube during NMR measurements, a tubular sample tube passage connecting together the sample tube insertion port and the sample tube support and capable of transporting the sample tube between them, and a gas stream generator for producing a gas stream in the sample tube passage to move the sample tube between the sample tube insertion port and the tube support. The gas stream generator is mounted at an intermediate (non-end) position in the sample tube passage.