Ultrasonic Flow Meter Profile Factor Correlation
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Solution Overview
Problem
Ultrasonic flow meters struggle to accurately measure the volume of fluids with different viscosities using a single correction curve, as their profile factors do not overlap, leading to inaccuracies in custody transfer transactions.
Innovation Solution
A flow meter system that calculates a profile factor and a meter factor using a single correlation between multiple profile and meter factors, allowing for accurate volume measurements across various fluids by combining their profile factor ranges, thereby enabling precise measurements within an error margin of 0.15% or less.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single correction curve is used for all fluids, then the device complexity is reduced, but the measurement precision deteriorates for fluids with different viscosities
Solution Approach 1:
The patent segments the correction approach by creating multiple correction curves, each tailored to specific fluid viscosity ranges. Instead of using a single universal correction curve, the system divides the fluid measurement space into segments based on viscosity characteristics, allowing each segment to have its own optimized correction parameters. This resolves the contradiction by maintaining low device complexity through a systematic segmentation strategy while achieving high measurement precision for each fluid type.
Solution Approach 2:
The patent implements a dynamic correction curve selection mechanism that automatically chooses the appropriate correction curve based on the detected fluid viscosity. The system dynamically adjusts which correction curve to apply by comparing measured profile factors against multiple predefined curves, selecting the best match for the current fluid. This dynamic adaptation enables the system to maintain high measurement precision across varying fluid viscosities without requiring manual intervention or complex hardware changes.
2Measurement precision
If multiple correction curves are used for different fluids, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The patent creates a universal correction curve management system that handles multiple fluid types and viscosity ranges through a unified approach. The system uses a single profile factor calculation method and a standardized comparison mechanism that works across all fluid types. This multi-functional framework allows the system to manage multiple correction curves efficiently, reducing the operational complexity despite having multiple curves available for different fluid viscosities.
Solution Approach 2:
The patent manages multiple correction curves by systematically varying key parameters such as profile factor thresholds and viscosity range boundaries. Instead of treating each correction curve as a separate complex entity, the system organizes them through parameter-based classification, where curves are selected and applied based on measurable fluid parameters. This parameter-driven management approach simplifies the handling of multiple correction curves while maintaining high measurement precision across different fluid types.
3Measurement precision
If profile factors are calculated for each fluid, then the measurement accuracy is improved, but the calculation complexity increases
Solution Approach 1:
The patent performs preliminary calculations of profile factors during the calibration phase, establishing reference values and correction relationships before actual fluid measurement. By pre-calculating and storing profile factor characteristics for various fluid viscosities, the system reduces the computational burden during real-time operation. This preliminary action allows the measurement system to quickly select and apply pre-determined correction factors rather than performing complex calculations for each measurement, thus improving accuracy while managing calculation 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
The system achieves accurate volume measurements for multiple fluids with different viscosities by applying distinct meter factors, improving measurement accuracy and reliability across a range of Reynolds numbers, from 7,000 to 200,000.
Implementation Method 1
Ultrasonic flow meters transfer acoustic signals across fluids for flow measurements. Based on the acoustic signals, the ultrasonic flow meters determine average velocities of the fluids.
Data Source
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AI summary
A flow meter system comprises a flow meter configured to enable a first flow of a first fluid; and transmitter electronics coupled to the flow meter and configured to calculate a PF of the first fluid, calculate an MF corresponding to the first PF based on a correlation between PFs and MFs, and calculate a first volume of the first fluid using the first MF. A method comprises establishing a correlation between MFs and PFs for a first fluid and a second fluid; storing the correlation in transmitter electronics of a flow meter system; testing the flow meter system using the correlation; and performing measurements using the correlation.