Pipeline Pressure Monitoring Using Flow Trends and Deviation Detection
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Solution Overview
Problem
Current pressure monitoring systems in natural gas piping systems rely on single-point threshold detection, which can lead to false alarms and inefficient maintenance, as they fail to account for trends and variations in pressure and flow rates over time, potentially missing early signs of system anomalies before they become critical.
Innovation Solution
A fluid monitoring system with a control unit and pressure sensors at upstream and downstream locations, capable of detecting conditions based on mean pressure and flow rate trends, using standard deviations to flag abnormal patterns, and incorporating temperature sensors for correction and failure detection, allowing for proactive maintenance and action without reaching maximum or minimum pressure thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If single-point threshold detection is used for pressure monitoring, then the system structure is simple, but false alarms occur frequently and early anomalies are missed
Solution Approach 1:
The system transitions from static threshold detection to dynamic trend analysis by continuously monitoring pressure and flow rate variations over time. The control unit analyzes patterns and deviations from normal operation, enabling early anomaly detection while maintaining system simplicity through software-based intelligence.
Solution Approach 2:
The system implements feedback mechanisms by continuously comparing current pressure and flow rate readings against historical data and established patterns. This feedback loop enables the control unit to detect deviations and trigger alerts, improving detection reliability without requiring complex additional hardware.
2Loss of time
If trend analysis with multiple variables is implemented, then early anomaly detection is improved, but the device complexity increases
Solution Approach 1:
The system performs preliminary analysis by continuously collecting and analyzing pressure and flow rate data to establish normal operation patterns. This ongoing baseline creation enables rapid anomaly detection when deviations occur, reducing detection time while using standard monitoring components.
Solution Approach 2:
The control unit serves multiple functions: it monitors pressure, monitors flow rate, establishes baselines, detects anomalies, and triggers alerts. By making the control unit multi-functional, the system achieves comprehensive trend analysis without adding separate dedicated devices for each function.
3Measurement precision
If standard deviations from mean pressure are used for detection, then false alarms are reduced, but the detection threshold complexity increases
Solution Approach 1:
The system changes the detection parameter from fixed threshold values to dynamic parameters based on mean pressure and standard deviation calculations. This allows the detection criteria to adapt to varying operating conditions, improving measurement precision while using standard computational methods available in typical control units.
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 system provides condition-based monitoring and maintenance, reducing unnecessary venting and enabling early detection of potential issues by analyzing trends in pressure and flow rates, thereby enhancing the safety and efficiency of natural gas distribution.
Implementation Method 1
The at least one recorder has a first pressure sensor for sensing an upstream pressure at an upstream location of a pipeline portion of the pipeline system and a second pressure sensor for sensing a downstream pressure at a downstream location of the pipeline portion
Data Source
AI summary
A fluid monitoring system is provided, which includes a control unit and at least one fluid pressure recorder. The recorder is configured for direct connection to a pipeline portion of a system to be monitored and includes upstream and downstream pressure sensors. The control unit is configured to detect, and provide for display or trigger an action, in the event that a new downstream pressure is more than a threshold number of standard deviations above or below a mean downstream pressure determined from prior readings of the downstream pressure—even though neither the minimum nor maximum pressure of the pipeline portion is reached. A fluid monitoring system for a regulator on a pipeline system is also provided.