Asymmetric Transducer Configurations for Non-Vertical Pipe EIT
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Solution Overview
Problem
Conventional transducer configurations for soft-field tomography, such as Electrical Impedance Tomography, are not optimally sensitive for non-vertical pipe geometries, where the distribution of liquids and gases within the pipe is asymmetric, leading to inaccurate measurements of fluid flow and property distribution.
Innovation Solution
The use of asymmetrically distributed transducers and non-uniform excitation patterns, including phase and amplitude modulation, to improve sensitivity and accuracy in measuring property distributions within multi-material objects, particularly in non-vertical pipe configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional symmetric transducer configurations are used, then the system is simple to implement, but measurement precision deteriorates for non-vertical pipe geometries
Solution Approach 1:
The patent applies asymmetry by distributing transducers unevenly around the pipe circumference, with specific positioning optimized for non-vertical pipe geometries. This asymmetric configuration allows the system to accurately capture the asymmetric distribution of liquid and gas in horizontal or inclined pipes, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
The patent implements local quality by positioning transducers at specific locations around the pipe circumference where they can optimally detect the local properties of the fluid distribution. This localized optimization of transducer placement improves measurement precision for non-vertical pipes without requiring complete redesign of the entire transducer system.
2Reliability
If conventional transducer configurations are used, then device complexity is low, but sensitivity deteriorates for asymmetric fluid distributions
Solution Approach 1:
The asymmetric transducer distribution enhances sensitivity to asymmetric fluid distributions by positioning detectors strategically to capture the varying liquid and gas levels in non-vertical pipes. This improves reliability of measurements while maintaining manageable device complexity through optimized rather than maximally complex configurations.
Solution Approach 2:
The patent employs dynamic excitation patterns that can adapt to different pipe orientations and fluid distributions. This dynamic approach allows the system to maintain high sensitivity across various operating conditions without requiring a completely complex static transducer arrangement for every possible scenario.
3Manufacturing precision
If symmetric transducer configurations are used, then ease of manufacture is high, but measurement accuracy deteriorates for non-vertical pipes
Solution Approach 1:
The patent addresses the contradiction between manufacturing ease and precision by providing specific asymmetric transducer positioning guidelines that can be implemented during manufacturing. The asymmetric configuration is designed to be manufacturable while achieving the required precision for non-vertical pipe measurements, balancing ease of manufacture with manufacturing precision.
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 the accuracy and sensitivity of soft-field tomography systems in determining fluid flow and property distributions in non-vertical pipes, enabling real-time visualization of gas distribution within pipes without the need for specialized equipment.
Implementation Method 1
Electrical Impedance Tomography (EIT), diffuse optical tomography, elastography, and related modalities may be used to measure the internal properties of an object, such as the electrical properties of materials comprising internal structures of the object
Data Source
AI summary
Transducer configurations and methods for transducer positioning in electrical impedance tomography are provided. A plurality of transducers for one electrical impedance tomography arrangement are configured for positioning proximate a surface of an object and spaced apart along the object, wherein the transducers are one or more conductive rings and have at least one non-conductive portion. The arrangement further includes one or more excitation drivers coupled to the plurality of transducers and configured to generate excitation signals for the plurality of transducers. The arrangement also includes one or more response detectors coupled to the plurality of transducers and configured to measure a response of the object at the plurality of transducers to the excitation applied by the plurality of transducers based on the excitation signals. The arrangement additionally includes a soft-field reconstruction module configured to reconstruct a property distribution based on the excitation signals and the measured response.