Observation Window Cleaning for Spectroscopic Measurement Accuracy
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Solution Overview
Problem
In mixing processes, deposits or contamination on observation windows can't be detected and lead to incorrect measured values due to their influence on transmission properties, which are indistinguishable from the analysis signal during spectroscopic monitoring.
Innovation Solution
A method and device that monitor the optical transmittance of the observation window by recording spectroscopic data outside the mixing container and using a product-specific limit value to determine cleanliness, triggering a cleaning device when deposits are detected, ensuring accurate measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spectroscopic monitoring is performed through the observation window during mixing processes, then mixing quality can be determined, but deposits on the window lead to incorrect measured values
Solution Approach 1:
The patent applies preliminary action by performing a reference measurement before the actual spectroscopic analysis. The reference measurement captures the transmission properties of the observation window when free of deposits, establishing a baseline for comparison. This preliminary reference data enables the system to detect and compensate for window contamination during subsequent measurements, thereby maintaining measurement precision despite the harmful effect of deposits.
2Measurement precision
If the observation window is cleaned during the mixing process, then measurement accuracy improves, but the mixing process is interrupted
Solution Approach 1:
The patent implements feedback by continuously comparing current spectroscopic measurements with the reference measurement. When deviations indicate window contamination, the system generates a signal to trigger cleaning. This feedback mechanism enables automated monitoring and response without requiring constant manual intervention or process interruption, as the cleaning is initiated only when actually needed based on real-time measurement quality assessment.
Solution Approach 2:
The system applies self-service by automatically detecting window contamination through spectroscopic measurement analysis and autonomously triggering the cleaning device. The mixing process continues uninterrupted, and the system manages its own maintenance needs without external intervention, thereby maintaining both measurement precision and process productivity.
3Reliability
If a cleaning device is added to maintain window cleanliness, then measurement reliability improves, but device complexity increases
Solution Approach 1:
The patent applies universality by designing the cleaning device to serve multiple functions: it can clean the observation window from both the inside and outside of the mixing container, and it can be positioned and operated in various configurations. This multi-functional design consolidates what could be multiple separate cleaning mechanisms into a single versatile device, thereby improving measurement reliability without proportionally increasing overall system 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
Prevents incorrect measurements by maintaining the window's cleanliness through automated cleaning, ensuring reliable spectroscopic analysis of mixture homogeneity.
Implementation Method 1
The spectroscopic analysis takes place in the position of the mixer when the mixed material rests on the observation window
Implementation Method 2
monitoring the optical transmittance of the observation window
Data Source
Figure 1~2
Figure 3
AI summary
The method involves storing a product-specific threshold value for spectroscopic data of a mixture in an analysis unit. A time is preset in dependence of a technological value of a mixing process, where the spectroscopic data decreases below the product-specific threshold value within the preset time. An analysis signal is outputted by an analysis unit when the spectroscopic data does not decrease below the product-specific threshold value within the preset time, where the signal contains information that an observation window (2) is inadmissibly and strongly contaminated. An independent claim is also included for a device for cleaning an observation window for a spectroscopic analysis of the homogeneity of a mixture in a mixing container.