NMR Moisture Measurement for Hay Cure Determination
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Solution Overview
Problem
Hay farmers face challenges in determining the degree of cure in hay due to the growth of yeast and moulds, which can lead to lower nutritional value and spontaneous combustion, as traditional physical methods are unreliable and time-consuming, and high bulk densities from powerful hay balers increase degradation risks.
Innovation Solution
A method using Nuclear Magnetic Resonance (NMR) instruments to measure spin-spin relaxation time (T2) of hydrogen protons to differentiate between bound and free moisture in hay, allowing for a scientific determination of the degree of cure and potential yeast and mould levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional physical methods are used to test hay cure, then the method is simple and quick, but the measurement precision and reliability are insufficient
Solution Approach 1:
The patent replaces traditional mechanical physical testing methods with Nuclear Magnetic Resonance (NMR) spectroscopy. The NMR instrument uses magnetic fields and radio waves to measure the spin-spin relaxation time (T2) of hydrogen protons in water molecules, providing a scientific basis for distinguishing bound and free moisture. This substitution of mechanical testing with physical field-based measurement significantly improves measurement precision and reliability while maintaining operational simplicity.
Solution Approach 2:
The patent utilizes the change in spin-spin relaxation time (T2) parameter as an indicator of moisture state. By measuring T2 values and comparing them against reference ranges, the system determines the degree of cure. This parameter-based approach allows for objective, quantifiable assessment of hay moisture content and cure status, resolving the contradiction between measurement accuracy and device complexity.
2Measurement precision
If laboratory analysis is used to determine CFU and nutritional parameters, then the measurement precision is high, but the loss of time is significant
Solution Approach 1:
The patent enables preliminary on-site assessment of hay cure status using portable NMR instruments before sending samples to laboratories. Farmers can immediately measure T2 relaxation times and determine bound/free moisture ratios in the field, making informed decisions about baling timing without waiting for laboratory results. This preliminary action eliminates the time delay while maintaining measurement precision through scientific NMR analysis.
Solution Approach 2:
The patent introduces NMR spectroscopy as an intermediary measurement technique between the hay sample and the final determination of cure status. The NMR instrument acts as a portable intermediary that provides rapid, accurate moisture state information without requiring sample transport to laboratories, thus reducing time loss while preserving measurement precision.
3Productivity
If high bulk density baling is implemented, then the productivity is improved, but the object-affected harmful factors increase
Solution Approach 1:
The patent implements a feedback mechanism where NMR measurements of bound and free moisture are continuously monitored during the baling process. The instrument provides real-time data on the hay's moisture state, allowing operators to adjust baling parameters or stop processing when the hay reaches optimal cure status. This feedback loop enables high productivity through efficient baling timing while preventing harmful factors by avoiding over-compression of uncured hay.
Solution Approach 2:
The patent applies preliminary NMR assessment to determine the exact moment when hay is ready for baling. By measuring T2 relaxation times and calculating bound/free moisture ratios before baling, operators can ensure the hay is properly cured, thereby enabling high bulk density baling without increasing the risk of yeast and mould degradation. This preliminary action prevents harmful factors from occurring in the first place.
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
Provides a reliable, accurate, and timely assessment of hay moisture levels, enabling farmers to prevent degradation and spontaneous combustion by identifying excessive yeast and mould levels, and optimizing baling timing based on instrumental data.
Implementation Method 1
using the spin-spin relaxation time (T2) of hydrogen protons to determine the relative quantity of bound moisture and free moisture
Data Source
AI summary
A method for determining the degree of cure in forages using a nuclear magnetic resonance (NMR) technique. An NMR instrument is used to determine the amount of bound moisture (typically called stem moisture) and free moisture (typically called dew moisture) the degree of which can be used to determine how cured the forage is. This method represents an improvement on the traditional ways of determining how cured a forage is. The traditional ways have been by twisting a bunch of forage in ones hands or using a mechanical method (Hammer of fingernail) to determine if there is too much stem moisture in the stem nodes. The method can be applied using a portable instrument or building the instrument into a forage harvesting machine such as a hay baler.