Multi-Directional RF Moisture Measurement for Anisotropic Materials
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Solution Overview
Problem
The measurement of moisture in direction-dependent materials using radio frequency electromagnetic radiation is inaccurate and unreliable due to factors like dielectric anisotropy, density, shape, and non-homogeneity, which result in direction-dependent measurement results.
Innovation Solution
A measurement device and method that generates radio frequency electromagnetic fields in multiple directions to resonate at different frequencies, allowing for the determination of moisture content based on resonance frequency and quality in various directions, and a control system that adjusts processes accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radio frequency electromagnetic radiation is used to measure moisture in direction-dependent materials, then moisture measurement can be performed, but the measurement result becomes highly direction-dependent and inaccurate
Solution Approach 1:
The patent transitions from single-direction measurement to multi-directional measurement by introducing measurement apparatus that can measure moisture content from multiple directions (at least two different directions). This dimensional expansion allows the system to capture direction-dependent variations and compute an integrated moisture content that is independent of measurement direction, thereby resolving the contradiction between measurement capability and accuracy/reliability.
2Device complexity
If single-direction electromagnetic field measurement is used, then the measurement system is simple, but the measurement result is highly direction-dependent
Solution Approach 1:
The system adds directional dimensions to the measurement process without significantly increasing overall complexity. By measuring in at least two different directions and processing these measurements to eliminate direction-dependence, the system achieves accurate moisture content determination while maintaining reasonable system complexity through efficient signal processing algorithms.
3Measurement precision
If multi-directional electromagnetic fields are generated to measure moisture, then direction-dependence is eliminated, but the device complexity increases
Solution Approach 1:
The patent implements multi-directional measurement capabilities by configuring measurement apparatus to generate and detect electromagnetic fields in at least two different directions. The system processes measurements from multiple directions through signal processing algorithms that eliminate direction-dependent components, thereby achieving direction-independent moisture content determination while managing device complexity through efficient multi-dimensional measurement strategies.
Solution Approach 2:
The measurement apparatus is designed with multi-functionality to perform measurements in multiple directions using the same basic hardware components. By making the measurement system universal across different measurement directions, the patent avoids the need for separate dedicated measurement devices for each direction, thereby reducing overall device complexity while still achieving accurate direction-independent moisture measurement.
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 eliminates or significantly reduces direction-dependence in moisture measurement, making the process reliable and accurate.
Implementation Method 1
generate in to a material space and in at least two different directions radio frequency electromagnetic fields adapted to resonate in different directions at a different frequency on the basis of the material insertable into the material space
Implementation Method 2
Owing e.g. to the dielectric anisotropy, density, shape and size and/or non-homogeneity of pieces or samples of the material to be measured, a measurement result is highly direction-dependent
Data Source
AI summary
An electromagnetic field tuning and detection apparatus generates in to a material space and in at least two different directions radio frequency electromagnetic fields adapted to resonate in different directions at a different frequency on the basis of a material insertable into the material space; and a signal processing unit configured to determine a moisture content of the material on the basis of a resonance frequency of each electromagnetic field and quality of each resonance in different directions. While controlling a process, a control system comprises a measurement chamber and an electromagnetic field tuning and detection apparatus placed on each material feed line of the process. A controller may control the process on the basis of each determined moisture content on each feed line.