Differential Pressure Measuring Arrangement Plugged Line Detection
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Solution Overview
Problem
Differential pressure measuring arrangements often produce false alarms due to temperature and differential pressure signal correlations, leading to incorrect detection of plugged lines, as they rely solely on self-registered data without considering additional process data.
Innovation Solution
The differential pressure measuring arrangement incorporates a processing unit that analyzes the correlation between temperature and differential pressure signals and verifies indications using additional process data from field devices and a central data repository, such as a process control system or cloud, to accurately identify plugged lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature and differential pressure signal correlation is used for detecting plugged lines, then detection capability is improved, but false alarms increase due to normal process variations
Solution Approach 1:
The patent introduces an intermediary verification mechanism that acts as a mediator between the temperature-differential pressure correlation analysis and the final plugged line detection conclusion. The processing unit first identifies potential plugging based on signal correlation, then verifies these indications by checking for additional supporting evidence from the same data set before generating alarms. This intermediary step filters out false positives caused by normal process variations while maintaining detection of actual plugging conditions.
Solution Approach 2:
The system implements feedback by continuously monitoring the relationship between temperature and differential pressure signals, using the outcomes of correlation analysis to adjust and refine detection thresholds. The verification process provides feedback loops where detection results are cross-checked against multiple criteria, and the system adapts its sensitivity based on the consistency of indications across different time periods and operating conditions.
2Reliability
If additional process data from field devices and central data repository are integrated, then detection reliability is improved, but system complexity increases
Solution Approach 1:
The processing unit is designed with multi-functionality to handle both the correlation analysis of temperature and differential pressure signals and the verification against additional process data from field devices and central data repository. This universal processing capability allows the same component to perform multiple functions (detection, verification, cross-validation) without requiring separate dedicated systems, thereby managing complexity while maintaining high detection reliability.
Solution Approach 2:
The patent merges the detection and verification functions into a unified processing approach. Instead of having separate independent systems for detection and verification, the processing unit combines both functions, integrating the correlation analysis with the additional data verification in a coordinated manner. This merging reduces overall system complexity while improving reliability through the combined strength of multiple data sources.
Data Source
AI summary
A differential pressure measuring arrangement, comprising: a differential pressure measuring transducer; a first differential pressure line supplying the differential pressure measuring transducer with the first media pressure; a second differential pressure line supplying the differential pressure measuring transducer with the second media pressure; a temperature sensor; and a processing and evaluation unit for processing the differential pressure measurement signal and the temperature signal; wherein the processing and evaluation unit is adapted to determine a significant correlation between a change of the temperature signal and the differential pressure signal and to consider such as indication of a plugged differential pressure line and is further adapted to test whether a considered indication of a plugged differential pressure line can be verified based on additional process data, which preferably were not registered by the differential pressure measuring transducer.