Surface Stress Sensor for Rapid Silage Fermentation Evaluation
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Solution Overview
Problem
Current methods for evaluating silage fermentation quality are time-consuming, require specialized equipment, and are not suitable for immediate on-site assessment, especially when initial ammonia concentration data is unavailable, and human olfactory sense is unreliable for detecting subtle differences in odor.
Innovation Solution
A method using a surface stress sensor to analyze volatile components from silage by detecting organic acids and nitrogen-containing compounds, with different response characteristics for C2, C3, and C4 acids, allowing for rapid evaluation based on gas composition and temporal signal patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If chemical analysis methods (V-score, Flieg score) are used to evaluate silage fermentation quality, then measurement precision is improved, but loss of time and device complexity increase
Solution Approach 1:
The patent replaces complex chemical analysis mechanical systems with an optical detection system. The sensor detects volatile components (organic acids, ammonia) emitted by silage through optical absorption spectroscopy, eliminating the need for time-consuming chemical extraction, distillation, and titration procedures while maintaining evaluation accuracy.
Solution Approach 2:
The patent introduces volatile components (organic acids, ammonia) as intermediaries between the silage and the sensor. Instead of directly analyzing the silage matrix, the sensor detects these volatile substances that naturally emit from the silage, enabling indirect but rapid quality assessment without complex sample preparation.
2Measurement precision
If chemical analysis methods are used to evaluate silage fermentation quality, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex chemical analysis equipment (distillation apparatus, titration equipment, spectrophotometers) with a compact optical sensor system. The sensor directly detects volatile components in the gas phase, eliminating the need for multiple specialized instruments and complex operational procedures.
3Ease of operation
If human olfactory sense is used to evaluate silage quality, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The patent introduces volatile components (organic acids, ammonia) as intermediaries between the silage and the sensor. Instead of directly analyzing the silage matrix, the sensor detects these volatile substances that naturally emit from the silage, enabling indirect but rapid quality assessment without complex sample preparation.
Solution Approach 2:
The patent replaces the human olfactory system with an electronic sensor system that objectively detects volatile components. This substitution maintains the simplicity of gas-phase detection while eliminating human subjectivity and inability to detect subtle odor differences.
4Measurement precision
If ammonia concentration change over time is measured (Patent Literature 1 method), then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent performs preliminary detection of volatile components (organic acids, ammonia) that indicate fermentation quality from the beginning. By detecting these components directly in the gas phase, the system provides immediate quality assessment without waiting for temporal changes to occur, enabling on-site evaluation at any stage.
Solution Approach 2:
The patent replaces the time-based temporal change measurement approach with direct optical detection of volatile components. This substitution allows immediate quality assessment based on current volatile emissions rather than requiring longitudinal monitoring from raw material stage.
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 quick and accurate evaluation of silage fermentation quality by measuring the ratio and amount of organic acids and nitrogen-containing compounds, providing a comprehensive assessment without complex operations.
Implementation Method 1
a surface stress sensor which has a response characteristic to at least one of organic acids belonging to C2 and C3 and a response characteristic to at least one of organic acids belonging to C4 that are different from each other
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
An object of the present invention is to make it possible to easily evaluate silage fermentation quality on site or the like. In one embodiment of the present invention, a gas generated from silage is applied to a surface stress sensor, and the amount of either one of organic acids and nitrogen-containing compounds contained in the silage is determined. The surface stress sensor can detect trace components in a gas by a simple device configuration and in simple procedures. Therefore, by utilizing the fact that relationship between the content of these components and the fermentation quality is known, the evaluation of fermentation quality can be easily realized by the above measurement.