Spectrometric Measuring Method for Liquid Media Interference
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Solution Overview
Problem
Existing spectrometric measuring methods for determining measurement variables in liquid media are hindered by intermittent interferences such as air or gas bubbles and macroscopic particles, which cause temporary measurement errors and reduce the reliability of measured values.
Innovation Solution
A spectrometric measuring method that continuously determines measurement spectra, discards spectra affected by optical saturation, and uses a verification method to detect and compensate for offsets caused by interferences, ensuring accurate measurement values even in the presence of sporadic interferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If measurement spectra are continuously recorded to maintain high measurement availability, then measurement precision deteriorates due to intermittent interferences such as air bubbles and particles
Solution Approach 1:
The patent applies preliminary action by continuously recording measurement spectra in advance and storing them in a buffer, so that when interferences occur, previously recorded clean spectra are available for immediate use. This ensures measurement continuity without waiting for interference-free conditions.
Solution Approach 2:
The patent implements feedback by continuously monitoring measurement quality parameters to detect interferences, then using this information to selectively discard affected spectra while maintaining reliable measurements from unaffected periods. This closed-loop approach maintains precision while preserving availability.
2Measurement precision
If measurement spectra are discarded when interferences are detected to maintain measurement accuracy, then measurement availability deteriorates due to loss of data during interference periods
Solution Approach 1:
The patent records measurement spectra continuously in advance before interferences occur, building a buffer of available data. When interferences are detected, the system immediately switches to using previously recorded clean spectra from the buffer, eliminating gaps in measurement availability while maintaining accuracy.
Solution Approach 2:
The patent discards only the specific measurement spectra that are contaminated by interferences, while recovering and utilizing previously recorded clean spectra from the buffer. This selective approach preserves measurement accuracy by removing only bad data while retaining good data for continuous measurement availability.
3Measurement precision
If reference spectra subtraction is used to compensate for interfering analytes, then measurement precision improves for permanent interferences, but measurement availability deteriorates because sporadic interferences cannot be compensated
Solution Approach 1:
The patent records clean measurement spectra in advance during interference-free periods and stores them in a buffer. When sporadic interferences occur, the system immediately retrieves previously recorded clean spectra from the buffer, ensuring continuous measurement availability without waiting for interference compensation to take effect.
Solution Approach 2:
The patent converts the harmful effect of sporadic interferences into a benefit by using them as triggers to switch to pre-recorded clean spectra from the buffer. The interference detection mechanism, which could simply discard data, is instead used to activate the recovery of reliable historical measurements, turning the interference event into a signal for maintaining measurement continuity.
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
This method extends the periods during which reliable measured values can be determined, minimizing the impact of intermittent interferences and maintaining high measurement accuracy.
Implementation Method 1
receives measurement radiation resulting from interactions with the medium, such as absorption, reflection, and/or scattering
Implementation Method 2
receives measurement radiation resulting from interactions with the medium, such as absorption, reflection, and/or scattering
Implementation Method 3
receives measurement radiation resulting from interactions with the medium, such as absorption, reflection, and/or scattering
Data Source
AI summary
The present disclosure relates to a spectrometric measuring method and device for measuring a parameter of a liquid medium in which interferences can occur that include bubbles and/or particles with dimensions larger than wavelengths within a measured wavelength range. In this process, measurement spectra are determined and those for which optical saturation has occurred are discarded. A medium spectrum is determined for each of the remaining measurement spectra. A check is then made to determine whether the measurement spectrum contains an offset caused by an interference by using a predetermined reference for a spectrum property that is expected in the absence of interferences. If an offset exists, the offset is subtracted from the corresponding measurement spectrum. Finally, the medium spectra are used to determine measured values of each measurement variable.