Multiphase Meter Adaptive Resonance Transmission Switching
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Solution Overview
Problem
Existing multiphase flow meter systems face challenges in providing accurate measurements across a wide range of compositions and salinities due to limitations in the microwave resonance principle, particularly under high-loss conditions where accuracy is reduced and resonator methods are less effective.
Innovation Solution
The system employs a combination of microwave resonator and transmission measurements, using three antennas for differential transmission under high-loss conditions and resonator methods under low-loss conditions, with a frequency sweep to measure resonance frequency and width, and switching between methods based on quality criteria such as Q-factor and attenuation ratio to ensure accurate composition and salinity measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If microwave resonance principle is used for measurement, then measurement accuracy is improved under low-loss conditions, but measurement accuracy deteriorates under high-loss conditions
Solution Approach 1:
The system dynamically switches between resonance measurement mode and transmission measurement mode based on real-time assessment of fluid loss characteristics. The measurement method is made adaptive by evaluating signal quality metrics and automatically selecting the appropriate measurement technique, allowing the system to maintain high accuracy across varying fluid compositions and loss conditions.
Solution Approach 2:
The system changes measurement parameters by switching between different measurement principles (resonance frequency measurement versus transmission signal measurement) based on the fluid's loss characteristics. This parameter adaptation allows accurate measurement across the complete range of compositions and salinities, overcoming the limitation of single-method systems.
2Measurement precision
If resonator method is used, then measurement accuracy is improved for certain fraction ranges, but measurement reliability deteriorates when loss in flow becomes sufficiently high
Solution Approach 1:
The system incorporates feedback mechanisms by continuously monitoring signal quality metrics such as Q-factor and attenuation ratio. Based on this feedback, the system automatically determines whether resonance or transmission measurement should be used, ensuring reliable measurements across all fluid conditions. The feedback loop maintains measurement reliability by preventing operation in unsuitable measurement modes.
Solution Approach 2:
The measurement system dynamically adapts its operating mode based on real-time fluid conditions. By assessing loss characteristics and switching between measurement techniques, the system maintains both accuracy and reliability across the complete range of fluid compositions, including high-loss conditions where traditional resonator methods fail.
3Device complexity
If single measurement method is used, then device complexity is reduced, but measurement precision deteriorates across complete range of compositions and salinities
Solution Approach 1:
The system achieves multi-functionality by integrating both resonance measurement capabilities and transmission measurement capabilities within a single device. This universal design allows the system to accurately measure a wide range of fluid compositions and salinities while maintaining acceptable complexity through shared hardware components and integrated control logic.
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 approach enhances measurement accuracy across a broader dynamic range by leveraging both resonance and transmission methods, allowing for precise determination of fluid composition and salinity even in high-loss scenarios, where traditional methods fail.
Implementation Method 1
a resonance measuring means including a transmitting antenna for providing a varying electromagnetic field within a frequency range in said pipe and a receiver antenna for measuring the resonance characteristics of the field
Implementation Method 2
measuring the resonance frequency and width, and switching between methods based on quality criteria such as Q-factor and attenuation ratio
Data Source
AI summary
A multiphase meter system including: transmitting and receiving antennas in the flow pipe, wherein the receiving antennas are at different distances from the transmitting antenna, and a control system configured to: apply an electromagnetic field to the transmitting antenna and receive signals from the receiving antenna induced in the fluid or the pipe by the transmission of the electromagnetic field; calculate a resonance quality of the signals received by at least one of the first and second receiver antennas; calculate composition or salinity of the fluid based on the resonance quality if the resonance quality is greater than a threshold value, and calculate composition or salinity of the fluid based on a transmission time difference of the signals received from the first receiver antenna and the signals received by the second receiver antenna if the resonance quality is below the threshold value.