Pressure Filtration Soil Analysis Device
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Solution Overview
Problem
Conventional methods for measuring soil nutrient levels are slow, expensive, and often impractical for real-time agricultural decision-making, limiting the effectiveness of precision agriculture due to the need for laboratory-based testing and high costs associated with sampling at high grid densities.
Innovation Solution
A soil analysis device that combines a soil sample with an extractant to create a slurry, which is then filtered using a pressure filtration system and analyzed using a broad-band light source to generate an attenuation spectrum, allowing for rapid and accurate identification of soil characteristics, including nitrogen concentration, outside of a laboratory environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If laboratory-based soil testing is used, then measurement precision is improved, but productivity deteriorates due to slow turnaround time
Solution Approach 1:
The patent extracts the filtration function from the complex laboratory testing process, using a portable pressure filtration device that can be deployed in the field. This separates the sample preparation step from the laboratory analysis, enabling faster turnaround by performing initial processing on-site while maintaining measurement precision through controlled filtration conditions.
Solution Approach 2:
The patent replaces gravity-based filtration with pressure-driven filtration using a portable pump system. This mechanical substitution enables controlled, rapid filtration in the field without requiring laboratory equipment, significantly improving productivity while maintaining measurement accuracy through consistent pressure application.
2Measurement precision
If standard filtration systems are used, then measurement precision is improved, but device complexity increases due to vacuum equipment requirements
Solution Approach 1:
The patent extracts the essential filtration function from complex vacuum systems, creating a standalone pressure filtration device. By removing the need for vacuum pumps and complex laboratory equipment, the system achieves comparable filtrate quality with significantly reduced device complexity and portability.
Solution Approach 2:
The patent substitutes vacuum-based filtration with pressure-based filtration using a simple portable pump. This mechanical substitution eliminates the need for complex vacuum equipment while maintaining effective filtrate generation, reducing device complexity and enabling field deployment.
3Measurement precision
If high grid density sampling is implemented, then measurement precision is improved, but loss of substance increases due to extractant consumption
Solution Approach 1:
The patent extracts and concentrates the extractant in a controlled pressure filtration system, allowing for precise measurement of nutrient concentrations even with small sample volumes. This enables high grid density sampling while minimizing total extractant consumption through efficient sample processing.
Solution Approach 2:
The patent changes the pressure parameter during filtration to optimize extractant efficiency. By applying controlled pressure, the system achieves complete extraction and filtration with minimal extractant volume, enabling dense sampling grids without proportionally increasing substance consumption.
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 fast, accurate, and cost-effective soil analysis, facilitating timely nutrient management decisions and improving agricultural efficiency by providing repeatable and reliable measurements in the field.
Implementation Method 1
A portion of the liquid mixture is pressure filtered to generate a volume of filtrate
Implementation Method 2
A portion of the slurry is exposed to a broad-band light source, with wavelengths varying from ultraviolet to visible to near-infrared, to generate an attenuation spectrum identifying the attenuation of different wavelengths of the light by the slurry
Data Source
AI summary
A filtration system for a soil analysis device and methods of pressure filtration and automated cleaning are disclosed for generating filtrate used in measuring characteristics of a soil sample and preparing the filtration system for repeated measurements. A mixing chamber combines a soil sample and an extractant into a liquid mixture. The filtration system receives and pressure filters the liquid mixture to quickly generate filtrate used to measure characteristics of the sample. The filtrate is passed to a measurement cell for analysis. Once the analysis is complete, the filtration system performs a cleaning process in preparation to receive a subsequent liquid mixture from another soil sample.