Pipe Gas-Liquid Ratio Sensing Using Radio-Wave Decay
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Solution Overview
Problem
Existing methods for measuring gas liquid ratios in two-phase fluids within pipes are prone to errors due to electric field intensity distributions caused by radio wave interference, leading to inaccurate measurements.
Innovation Solution
A sensor system that transmits and receives radio waves through a pipe, calculates the gas liquid ratio based on the decay time of the radio wave after transmission termination, reducing the effects of electric field intensity distribution by using a controller to process the received signal and calculate the gas liquid ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If radio wave transmission is used to measure gas liquid ratio, then measurement capability is provided, but electric field intensity distribution causes measurement error
Solution Approach 1:
The transmitter alternates between transmission periods and termination periods, creating periodic action. During transmission periods, radio waves are sent through the pipe; during termination periods, transmission stops. This periodic operation allows the system to capture signal characteristics at different phases, enabling calculation of the gas liquid ratio while compensating for electric field distribution effects.
Solution Approach 2:
The controller receives signals from the receiver and calculates the gas liquid ratio based on the received signal characteristics and decay time. This feedback mechanism allows the system to process the received information and generate accurate measurements by analyzing how the radio wave signal decays after transmission termination, thereby compensating for electric field intensity distribution effects.
2Measurement precision
If radio wave attenuation measurement is used, then gas liquid ratio can be determined, but interference and noise reduce measurement reliability
Solution Approach 1:
By using periodic transmission and termination, the system creates distinct time windows for signal injection and measurement. The decay time measurement during termination periods provides a reliable indicator of gas liquid ratio that is less susceptible to continuous interference and noise, improving measurement reliability.
Solution Approach 2:
The decay time of the radio wave signal serves as an intermediary parameter that mediates between the raw received signal and the final gas liquid ratio calculation. By measuring how long it takes for the signal to decay after transmission termination, the system obtains a robust intermediate value that is less affected by interference and noise, leading to more reliable measurements.
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
Accurately measures the gas liquid ratio with reduced interference, achieving high precision by suppressing the impact of electric field intensity distribution and noise, thereby improving measurement accuracy.
Implementation Method 1
a transmitter configured to transmit a radio wave into the pipe
Implementation Method 2
a receiver configured to receive the radio wave through the pipe
Implementation Method 3
calculate the gas liquid ratio based on both the radio wave received by the receiver and a decay time taken for attenuation of the radio wave
Data Source
AI summary
A sensor system for measuring a gas liquid ratio of a two-phase fluid that flows through a pipe is provided. The sensor system includes a transmitter configured to transmit a radio wave into the pipe. The sensor system includes a receiver configured to receive the radio wave through the pipe. The sensor system includes a controller configured to calculate the gas liquid ratio based on both the radio wave received by the receiver and a decay time taken for attenuation of the radio wave after the transmitter terminates the transmission of the radio wave.