NIR Spectroscopy for Powdered Binder Quantification in Wood Panels
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Solution Overview
Problem
Current manufacturing processes for wood-based panels using biodegradable powdered binders lack analytical capabilities for continuous, non-destructive, and in-line assessment of binder distribution, leading to unclear production conditions and unnecessary raw material consumption.
Innovation Solution
A method utilizing NIR multi-sensor technology to record NIR spectra of wood particle-binder mixtures, comparing them with reference samples to determine the quantitative proportion of powdered binder, enabling continuous and non-destructive measurement during production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If powdered binders are used instead of liquid adhesives, then renewable raw materials can be utilized and water solubility issues are avoided, but continuous monitoring of binder distribution becomes impossible and raw material consumption increases
Solution Approach 1:
The patent replaces visual inspection methods with NIR spectroscopy technology to detect and quantify binder distribution. The NIR sensor system uses optical fields instead of mechanical or visual assessment to measure binder content in real-time, enabling precise control and reducing material waste while maintaining versatility with powdered binders
Solution Approach 2:
The invention implements a feedback control system where NIR measurements of binder distribution are continuously monitored and fed back to the dosing system. This allows real-time adjustment of binder application rates to maintain optimal distribution, preventing both over-dosing and under-dosing, thereby reducing raw material consumption while using renewable powdered binders
2Reliability
If higher dosage of glue powder is used to ensure minimum strength values, then production reliability improves, but raw material consumption and costs increase
Solution Approach 1:
The NIR-based feedback system continuously monitors actual binder distribution and provides real-time data to the control system. This enables precise adjustment of dosing rates to maintain the minimum required binder content for strength requirements, avoiding both deficiency (which would compromise reliability) and excessive dosing (which would waste material)
Solution Approach 2:
The system dynamically adjusts the dosing parameter (binder application rate) based on real-time NIR measurements of distribution quality. By changing this parameter in response to actual conditions rather than using fixed high dosages, the system maintains production reliability while minimizing raw material consumption
3Device complexity
If visual assessment of powder distribution is used, then equipment complexity remains low, but measurement precision and continuous monitoring capability are insufficient
Solution Approach 1:
The patent substitutes simple visual inspection with NIR spectroscopy technology. The NIR sensor system uses optical absorption measurements to precisely quantify binder content and distribution, providing objective, accurate, and continuous data without requiring complex mechanical intervention or modification of the production line
Solution Approach 2:
The NIR sensor acts as an intermediary between the binder distribution process and the control system. It translates physical binder distribution into measurable spectral signals that can be quantified and used for control, bridging the gap between simple observation and precise measurement without adding significant complexity
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 rapid, real-time, and non-contact determination of powdered binder quantity, reducing scrap, improving production efficiency, and enhancing quality control with minimal equipment modification.
Implementation Method 1
at least one NIR multi-sensor for recording at least one NIR spectrum of the mixture of the at least one powdered binder and wood particles using the at least one NIR sensor in a wavelength range between 900 nm and 1700 nm
Data Source
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AI summary
The invention relates to a method for determining the quantity of at least one biodegradable pulverulent binder in a mixture comprising wood particles, wherein the at least one pulverulent binder is provided in a mixture comprising wood particles. The method has the steps of: providing mixtures of at least one pulverulent binder and wood particles as reference samples, wherein the at least one pulverulent binder and wood particles are provided in a respective quantitatively defined mixture ratio in the mixtures; recording at least one NIR spectrum of the reference samples in a wavelength range of 900 nm to 1700 nm using at least one NIR measuring head; providing a mixture to be measured of at least one pulverulent binder and wood particles; recording at least one NIR spectrum of the mixture of the at least one pulverulent binder and wood particles in a wavelength range of 900 nm to 1700 nm using the at least one NIR measuring head; and determining the quantitative proportion of pulverulent binder in the mixture of the pulverulent binder and wood particles by comparing with the NIR spectra recorded for the reference samples.