Spectroscopic Frequency Registration Correction
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Solution Overview
Problem
Spectroscopic analysis systems face challenges in maintaining accurate and reproducible frequency and wavelength registration due to hardware degradation, drift, and non-reproducibility, with existing solutions requiring additional hardware, interrupting continuous measurements, and being susceptible to background fluid changes and temperature/pressure effects.
Innovation Solution
A computer-implemented method and system that quantify frequency registration deviation in spectroscopic analysis using multivariate analysis to correct field spectra without requiring additional hardware or periodic validations, applying spectral shift techniques to maintain accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reference cell technologies are used to correct frequency registration deviations, then measurement accuracy is improved, but device complexity increases due to additional hardware installation
Solution Approach 1:
The patent extracts the frequency registration correction function from separate reference cell hardware and integrates it into the existing spectral analysis software. The system uses virtual reference cells created through mathematical modeling rather than physical reference cells, separating the correction function from physical hardware dependencies.
Solution Approach 2:
The patent replaces the mechanical/optical reference cell system with a computational approach using multivariate analysis and virtual reference spectra. The physical reference cell hardware is substituted with software-based spectral modeling that achieves the same correction function without additional optical components.
2Measurement precision
If periodic frequency registration checks using standard gases are performed, then measurement accuracy is improved, but productivity decreases due to measurement blind time and switching mechanisms
Solution Approach 1:
The patent enables continuous spectral analysis without periodic interruptions for reference measurements. The virtual reference cell approach allows frequency registration correction to be applied continuously to all measurements without requiring the system to switch to a reference gas mode, maintaining uninterrupted process monitoring.
Solution Approach 2:
The patent performs frequency registration correction as part of the standard measurement process rather than as a separate periodic validation step. The multivariate analysis model is prepared in advance to handle frequency deviations, eliminating the need for subsequent correction steps that would interrupt measurements.
3Measurement precision
If peak tracking approaches are used to correct frequency registration deviations, then linear frequency deviation correction is improved, but measurement reliability deteriorates due to susceptibility to background fluid changes and temperature/pressure effects
Solution Approach 1:
The patent transforms the frequency registration correction from a single-peak tracking approach to a multivariate spectral analysis approach. Instead of relying on the position of a single spectral peak that is sensitive to background changes, the system analyzes multiple spectral features simultaneously using multivariate analysis, making the correction robust against variations in background composition, temperature, and pressure.
Solution Approach 2:
The patent creates a universal correction model that handles multiple sources of frequency deviation (linear drift, non-linear drift, temperature effects, pressure effects) through a single multivariate analysis framework. The virtual reference cell approach provides a unified solution that works across different operating conditions and analyte types, rather than requiring separate correction methods for each condition.
Data Source
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AI summary
A frequency registration deviation is quantified for a field spectrum collected during analysis by a spectroscopic analysis system of a sample fluid when the spectroscopic analysis system has deviated from a standard calibration state. The field spectrum is corrected based on the frequency registration deviation using at least one spectral shift technique, and a concentration is calculated for at least one analyte represented by the field spectrum using the corrected field spectrum. Related systems, methods, and articles are described.