Real-Time Roast Control via Gas Spectral Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current roasting methods for food items, such as coffee, rely on subjective markers and temperature profiles that are inconsistent due to variations in bean moisture and lipid content, making it difficult to achieve a desired roast quality in real-time.
Innovation Solution
Monitoring the interaction of emitted gases with mid-IR and visible electromagnetic radiation to detect spectral changes during roasting, allowing for real-time adjustment of roasting parameters to achieve a desired roast level by correlating spectral data with roasting profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If temperature profiles are used to control roasting, then the roasting process can be standardized, but consistency of the desired roast cannot be ensured due to variation in beans and moisture content
Solution Approach 1:
The system continuously monitors volatile organic compounds emitted during roasting using mass spectrometry and provides real-time feedback to adjust roasting parameters. This closed-loop control ensures consistent roast quality by responding to actual chemical changes in the beans rather than relying solely on pre-set temperature profiles.
Solution Approach 2:
The patent replaces traditional mechanical/thermal control methods (temperature profiles) with a spectroscopic analysis system that detects chemical changes in real-time. Mass spectrometry substitutes for subjective artisan markers, providing objective, quantifiable data for process control.
2Ease of operation
If subjective markers such as first crack and second crack are used to classify roast degree, then the process can be simple to operate, but the markers are subjective and limited in efficacy due to inherent differences in beans
Solution Approach 1:
The system replaces subjective sensory markers (crack sounds, visual inspection) with objective mass spectrometric analysis of volatile organic compounds. The mass spectrometer provides precise, quantifiable chemical data that eliminates subjectivity while maintaining operational simplicity through automated analysis.
Solution Approach 2:
The system introduces mass spectrometry as an intermediary between the roasting process and the operator. Instead of directly observing crack sounds or visual changes, the operator receives processed spectral data that objectively indicates roast progression, translating complex chemical information into actionable insights.
3Measurement precision
If analytical techniques such as capillary gas chromatography are used to quantify organic roasting loss, then the degree of roast can be precisely measured, but the analysis takes a long time and cannot provide real-time information
Solution Approach 1:
The mass spectrometry system operates continuously throughout the roasting process, providing uninterrupted real-time monitoring of volatile organic compounds. This eliminates the need for intermittent sampling and batch analysis, enabling continuous process control without time loss.
Solution Approach 2:
The system rushes through the analysis process by using mass spectrometry, which provides rapid spectral acquisition and processing compared to traditional chromatographic methods. The real-time capability skips the time-consuming steps of sample preparation, column separation, and sequential detection inherent in GC methods.
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 precise and consistent control of the roasting process, providing real-time feedback to ensure the quality and consistency of the final product by objectively marking the inception, progress, and maturity of the roasting process.
Implementation Method 1
monitoring the evolved gases and their interaction with electromagnetic radiation
Data Source
AI summary
A method for evaluating and controlling roasting and degree (level) of roast in food items including but not limited to: coffee, cocoa, beans, nuts, grains and seeds, involves collecting spectra of the gases (including water vapor) emitted during roasting in the mid-infrared region using either mid-infrared source or visible light to include Raman scattering. The changes in the spectra, due to absorption by molecular vibrations in the gases emitted during roasting are evaluated in real time during roasting. These data may be processed in frequency or time domain. The spectra and change in spectra are correlated with a roasting profile to mark the inception of roasting, progress of roasting and maturity/achievement of degree of a roast. The information can be transmitted to the roaster or controller to monitor the roasting progress and can be used to adjust parameters as desired during roasting.