Agricultural Sampling System for As-Collected Soil Slurry Processing
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Solution Overview
Problem
Existing soil sampling processes require drying and grinding of samples, which are time-consuming and can affect the accuracy of chemical analysis, and existing soil slurry density measurement devices are inaccurate due to interference from iron particles.
Innovation Solution
An automated system that processes soil samples in their 'as collected' condition, forming a slurry without drying or grinding, and uses a digital density meter with magnetic isolation features to accurately measure slurry density, overcoming interference from iron particles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional drying and grinding processes are used for soil samples, then sample preparation is thorough, but processing time is excessive and accuracy may be compromised
Solution Approach 1:
The system performs preliminary actions by pre-mixing soil samples with water and extractants in controlled ratios before analysis, eliminating the need for time-consuming drying and grinding steps. The automated sample preparation unit creates consistent slurries in advance, ready for immediate analysis.
Solution Approach 2:
The invention changes the physical state parameter of soil samples from dry to wet slurry form, enabling direct analysis without drying. The digital density meter measures density in the liquid slurry state, and the system adjusts water-to-soil ratios to optimize analysis accuracy while reducing processing time.
2Measurement precision
If traditional density measurement is used for soil slurry, then measurement is simple, but accuracy is compromised due to iron particle interference
Solution Approach 1:
The digital density meter with magnetic isolation features extracts or separates the measurement signal from the interfering iron particles. The magnetic isolation mechanism removes or neutralizes the effect of iron particles on density measurements, allowing accurate readings despite the presence of magnetic materials in soil samples.
Solution Approach 2:
The magnetic isolation system acts as an intermediary between the density measurement field and iron particles in the slurry. It mediates the interaction by shielding or compensating for magnetic interference, enabling accurate density measurements without direct contamination from iron particles.
3Productivity
If manual sample processing is used, then equipment complexity is low, but productivity and consistency are insufficient
Solution Approach 1:
The system merges multiple functions into integrated units: the sample preparation unit combines mixing, dilution, and homogenization; the digital density meter integrates density measurement with magnetic isolation; and the analysis system combines extractant addition, filtration, and chemical analysis. This consolidation increases productivity while managing complexity through functional integration.
Solution Approach 2:
The automated system is designed with multi-functional components that can handle various sample types and analysis requirements. The sample preparation unit can process different soil types with varying water-to-soil ratios, the density meter accommodates different slurry compositions, and the analysis system performs multiple chemical tests, increasing overall productivity across diverse agricultural applications.
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 system allows for rapid, simultaneous analysis of multiple samples with improved accuracy by ensuring consistent water-to-soil ratios and precise density measurements, reducing processing time and enhancing analytical reliability.
Implementation Method 1
uses a digital density meter with magnetic isolation features to accurately measure slurry density, overcoming interference from iron particles
Implementation Method 2
a mixer-filter apparatus which mixes the collected raw soil sample in the 'as sampled' condition (e.g. undried and unground) with water to form a sample slurry
Implementation Method 3
centrifugating the slurry sample to yield a clear supernatant
Data Source
AI summary
An automated computer-controlled sampling system and related methods for collecting, processing, and analyzing agricultural samples for various chemical properties such as plant available nutrients. The sampling system allows multiple samples to be processed and analyzed for different analytes or chemical properties in a simultaneous concurrent or semi-concurrent manner. Advantageously, the system can process soil samples in the “as collected” condition without drying or grinding. The system generally includes a sample preparation sub-system which receives soil samples collected by a probe collection sub-system and produces a slurry (i.e. mixture of soil, vegetation, and/or manure and water), and a chemical analysis sub-system which processes the prepared slurry samples for quantifying multiple analytes and/or chemical properties of the sample. The sample preparation and chemical analysis sub-systems can be used to analyze soil, vegetation, and/or manure samples.