Optical Extinction Measuring System Commissioning via Individual Calibration
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Solution Overview
Problem
Existing optical extinction measurement systems face inaccuracies due to piece or batch tolerances of components, leading to deviations in calibration curves and reduced measurement accuracy.
Innovation Solution
A procedure for commissioning a measuring system that creates an individual calibration model accounting for the emission spectrum of the light source and the sensitivity spectrum of the detector, and adjusts the system using multiple measuring points to compensate for component tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a constant calibration curve is used for all measuring systems, then the device complexity is reduced and ease of manufacture is improved, but measurement precision deteriorates due to piece or batch tolerances of components
Solution Approach 1:
The patent applies local quality by creating individual calibration models tailored to each specific measuring system's components. Instead of using a universal calibration curve, the system determines component-specific characteristics (emission spectrum of light source, sensitivity spectrum of detector, transmission curves of optical components) and generates a customized calibration model for each measuring system. This ensures high measurement precision by accounting for local variations in component properties while maintaining manageable complexity through automated determination procedures.
2Measurement precision
If individual calibration models are created for each measuring system, then measurement precision is improved by accounting for component properties, but device complexity and commissioning time increase
Solution Approach 1:
The patent applies preliminary action by determining all component characteristics (emission spectrum, sensitivity spectrum, transmission curves) during the commissioning phase before actual measurements begin. The system performs spectral measurements of all optical components in advance, stores these characteristics, and uses them to generate the individual calibration model. This preliminary characterization eliminates the need for repeated adjustments during operation, reducing long-term commissioning time while maintaining high measurement precision.
Solution Approach 2:
The measuring system performs self-characterization by automatically measuring the emission spectrum of its light source, the sensitivity spectrum of its detector, and the transmission curves of its optical components without requiring external calibration equipment or manual intervention. The system uses its own measurement capabilities to determine its own characteristics and generate its own calibration model, significantly reducing commissioning time and complexity while achieving high measurement accuracy.
3Ease of manufacture
If piece or batch tolerances of optical components are not considered, then ease of manufacture is improved and device complexity is reduced, but measurement precision deteriorates due to deviations in calibration curves
Solution Approach 1:
The patent applies parameter changes by determining the actual spectral parameters of each component (emission spectrum of light source, sensitivity spectrum of detector, transmission curves of filters and windows) and using these measured parameters to generate the calibration model. Instead of assuming nominal parameter values, the system adapts the calibration model to the actual parameter values of the installed components, compensating for piece or batch tolerances and achieving high measurement precision while maintaining ease of manufacture through automated parameter determination.
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 approach minimizes dependence on component transmission curves, improving measurement accuracy by generating a sensor-specific calibration curve that accounts for the properties of installed components.
Implementation Method 1
the calibration model comprises the emission spectrum of the light source
Implementation Method 2
the calibration model comprises the sensitivity spectrum of the detector
Implementation Method 3
the calibration model comprises a transmission spectrum of at least one further optical or electrical component
Implementation Method 4
the extinction (also called optical density) is a measure of the attenuation of radiation (e.g., light) after passing through a medium
Data Source
AI summary
The present disclosure includes a procedure for commissioning a measuring system for optical extinction measurement for a measured variable, where the measuring system comprises a plurality of optical and electrical components. The procedure includes steps of creating an individual calibration model for the measuring system, comprising the relationship between extinction and measured variable, where the measuring system comprises a light source and the calibration model comprises the emission spectrum of the light source, and where the measuring system comprises a detector and the calibration model comprises the sensitivity spectrum of the detector. The method includes adjusting the measuring system with at least one measuring point using the individual calibration model.