Fodder NIR Sensor Calibration for Moisture Precision
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Solution Overview
Problem
Current devices lack precision in estimating the moisture and ingredient content in animal fodder, leading to inefficient feed mixing and potential ammonia emissions, as they require frequent calibration and are not suitable for varying moisture levels in silage.
Innovation Solution
A device using near-infrared (NIR) calibration models with preprocessing techniques like first derivative and SNV, combined with a photonic sensor and processing unit, to provide accurate estimates of fodder ingredients, allowing for homogenous distribution and reliable moisture measurement across different types of fodder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a device for estimating moisture or ingredients in fodder is used, then the precision of ingredient estimation is improved, but the device requires calibration at every single installation in the field which increases loss of time and resources
Solution Approach 1:
The device performs preliminary calibration in a laboratory setting before field deployment. The calibration process is completed in advance using controlled laboratory conditions, allowing the device to be pre-configured with calibration data. This preliminary calibration action eliminates the need for time-consuming on-site calibration at each installation location, while still achieving high measurement precision in the field.
2Adaptability or versatility
If the fodder moisture content varies, then the adaptability of the device to different conditions is improved, but the measurement precision deteriorates without frequent calibration
Solution Approach 1:
The device incorporates multiple radiation sources operating at different wavelengths (NIR and SWIR ranges) to detect changes in fodder properties. By measuring at multiple wavelengths, the system can distinguish between variations in moisture content and variations in ingredient composition. The calibration process establishes relationships between spectral measurements and actual ingredient content across different moisture conditions, allowing the device to maintain precision despite varying moisture levels.
3Measurement precision
If more radiation wavelengths are used for analysis, then the measurement precision of different ingredients is improved, but the device complexity increases
Solution Approach 1:
The device segments the radiation analysis into two distinct wavelength ranges: NIR (0.75-1.4 μm) and SWIR (1.4-3 μm). Each wavelength range is optimized for detecting specific ingredient types - NIR for certain organic compounds and SWIR for moisture and other ingredients. This segmentation allows the use of multiple wavelengths to improve measurement precision while managing device complexity through modular design and focused wavelength selection rather than attempting to analyze all possible wavelengths simultaneously.
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 solution enables precise and consistent estimation of fodder ingredients, reducing waste and ammonia emissions by providing accurate protein and starch content, even when fodder moisture varies, thus optimizing feed efficiency and cost.
Implementation Method 1
Near infrared (NIR) calibration models are optimized using spectra collected from the device in the laboratory or mounted on a box
Implementation Method 2
spectra are preprocessed e.g. by using first derivative and SNV (Standard Normal Variate) and calibration models optimized that correlate the properties of the fodder with preprocessed spectra
Data Source
AI summary
A device for estimating at least one property of fodder includes a screw at least partially installed in a cylinder bore configured for transporting a part of the fodder, an electromagnetic radiation source configured for irradiating the part of the fodder transported by the screw by radiation with wavelengths longer than 780 nm, and a photonic sensor configured for detecting electromagnetic radiation transmitted through, reflected by or emitted by the part of the fodder transported by the screw, and for outputting an output signal representing the detected electromagnetic radiation.