Conveyor Moisture Sensing for Inhomogeneous Bulk Material
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Solution Overview
Problem
Existing devices for determining moisture content in inhomogeneous bulk materials like woodchips or potato products lack accuracy and versatility, often requiring assumptions about bulk density and using equipment that is not suitable for foodstuffs, such as X-rays, which poses safety concerns and is costly.
Innovation Solution
A device comprising a conveying element, displacement measuring device, height determining device, weighing device, and high-frequency moisture measuring sensors that dynamically determine moisture content without assumptions on bulk density, using electromagnetic radiation to measure moisture across a wide area, ensuring high accuracy and safety for various materials, including foodstuffs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If X-rays are used to determine moisture content, then measurement capability is achieved, but safety concerns and operational costs increase
Solution Approach 1:
The patent changes the electromagnetic radiation frequency parameter from X-ray range to microwave range (1-3 GHz). This parameter change maintains the ability to measure moisture content through electromagnetic interaction with water molecules while eliminating the harmful ionizing radiation effects of X-rays, thus resolving the contradiction between measurement capability and safety concerns
Solution Approach 2:
The patent employs microwave radiation instead of expensive X-ray equipment, reducing operational costs and safety precautions. The microwave system provides sufficient measurement capability without the high costs and safety requirements associated with X-ray technology
2Device complexity
If assumptions about bulk density are made, then measurement process is simplified, but measurement accuracy deteriorates
Solution Approach 1:
The patent incorporates a feedback mechanism where the microwave system continuously measures the dielectric properties of the bulk material and adjusts measurements based on actual material characteristics rather than assuming fixed bulk density values. This feedback approach eliminates the need for simplifying assumptions while maintaining measurement accuracy
Solution Approach 2:
The system dynamically adapts measurement parameters based on the actual dielectric properties detected in the material flow, rather than relying on predetermined bulk density assumptions. This parameter adaptation resolves the contradiction by eliminating simplifying assumptions while maintaining process feasibility
3Device complexity
If random sampling is used, then device complexity is reduced, but measurement accuracy and representativeness worsen
Solution Approach 1:
The patent implements a universal measurement system where the microwave sensors measure moisture content across the entire width of the material flow simultaneously. This multi-functional approach eliminates the need for separate random sampling procedures while providing comprehensive and representative moisture content data across all material positions
Solution Approach 2:
The system transitions from one-dimensional random point sampling to two-dimensional continuous coverage across the material flow width. By measuring across the entire width simultaneously, the system obtains representative data without the complexity of multiple sampling points and statistical analysis
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
The device provides highly accurate and continuous moisture content determination in real-time, unaffected by bulk density fluctuations, suitable for a wide range of materials, including foodstuffs, with reduced safety precautions and lower operational costs compared to X-ray technology.
Implementation Method 1
by irradiating the bulk material in the moisture measuring region, upward through the load-carrying surface of the conveying element, with electromagnetic radiation, at a frequency or frequencies from 1 Gigahertz to 3 Gigahertz
Data Source
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AI summary
The invention relates to a method and a device for determining the moisture content of bulk material (2) from a flow of inhomogeneous bulk material such as woodchips or potato products, comprising a conveying element (4) provided with a load-carrying surface (8) for conveying the bulk material (2) in a conveying direction through the device, a displacement measuring device (10), a height determining device (12) for determining a height of the bulk material (2), a weighing device (16) and a moisture content determining device (18) comprising a moisture measuring sensor (20) for determining moisture in the bulk material (2). The invention also relates to a method for processing bulk material, using such a device.