Bypass MEMS Density Verification for In-Process Viscosity Meters
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Solution Overview
Problem
Existing methods for verifying density and viscosity measurements in process plants are cumbersome, require special equipment, generate waste, and cannot be performed under real process conditions, especially with volatile components.
Innovation Solution
A method using a MEMS-based master or control density meter in a secondary channel bypassing the main channel, allowing continuous verification under real process conditions without generating waste, and utilizing a secondary channel with different diameters to control medium flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual verification procedures are used for density and viscosity measuring devices, then device complexity is reduced, but measurement precision and reliability deteriorate due to human error and contamination risks
Solution Approach 1:
The measuring device performs self-verification by automatically comparing measured values against stored reference values for density and viscosity. The device autonomously determines whether calibration is needed and initiates recalibration procedures without external intervention, eliminating manual verification while maintaining measurement precision.
Solution Approach 2:
The system continuously monitors measured values and compares them against reference values, providing feedback when deviations exceed predetermined thresholds. This feedback mechanism triggers automatic recalibration procedures, ensuring measurement precision is maintained through closed-loop control rather than manual intervention.
2Measurement precision
If frequent manual verification and recalibration are performed, then measurement precision is maintained, but productivity deteriorates due to time loss and sample consumption
Solution Approach 1:
The device autonomously manages its own calibration schedule and execution, performing verification only when necessary based on actual measured values rather than on a fixed manual schedule. This self-service approach maintains measurement precision while minimizing interruptions to productivity by eliminating unnecessary verification cycles.
Solution Approach 2:
The system dynamically adjusts verification frequency based on measured parameter stability. When measurements remain within acceptable ranges, verification frequency is reduced. When deviations occur, the system increases monitoring intensity. This adaptive approach maintains precision while optimizing productivity by avoiding excessive verification.
3Productivity
If automated verification systems are implemented, then productivity is improved by reducing manual intervention, but device complexity increases due to additional sensors and processing requirements
Solution Approach 1:
The measuring device integrates multiple functions into a single system: it performs both primary measurements and self-verification using the same sensor and processing unit. The device stores reference values and compares measured values against these references, enabling automated calibration verification without requiring separate dedicated hardware, thus improving productivity while limiting complexity increase.
Solution Approach 2:
The verification functionality is merged with the primary measurement function. The same density and viscosity sensors used for production measurements also perform verification by comparing against stored reference values. This consolidation eliminates the need for separate verification hardware, improving productivity while keeping device complexity manageable through functional integration.
4Measurement precision
If manual cleaning and preparation of measuring devices is performed, then measurement precision is maintained by preventing contamination, but productivity deteriorates due to time-consuming preparation procedures
Solution Approach 1:
The device performs self-verification and self-diagnosis, automatically detecting when contamination or calibration drift occurs and initiating appropriate corrective actions. This eliminates the need for manual cleaning and preparation procedures while maintaining measurement precision through continuous automated monitoring and correction.
Solution Approach 2:
The system continuously monitors measurement quality and provides feedback when contamination or calibration issues are detected. This feedback triggers automatic corrective procedures such as recalibration or cleaning cycles, maintaining measurement precision while minimizing manual intervention and maximizing productivity by addressing issues only when necessary.
Data Source
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AI summary
The invention relates to a method for verifying a density and/or viscosity measuring device, preferably a measuring device which requires calibration, in a measuring station of a processing facility during a running operation, wherein a medium, in particular a hydrocarbon-containing medium, flows through a main channel of the processing facility. The method has the following steps: - providing an auxiliary channel which is connected as a bypass to the main channel, said auxiliary channel being fluidically attached to the main channel via two regions of the main channel with different diameters (S100); - providing a MEMS-based master or control density measuring device in the auxiliary channel such that the medium flows through the MEMS-based master or control density measuring device (S200); - carrying out at least one verification measurement using the MEMS-based master or control density measuring device (S300); and - verifying the density and/or viscosity measuring device using the at least one verification measurement carried out by the MEMS-based master or control density measuring device (S400).