Inline Ultrasonic Flow Meter Assembly for Transducer Alignment
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Solution Overview
Problem
Traditional clamp-on ultrasonic flow meters require multiple installation details that are difficult to obtain and detect, leading to inaccurate measurements and increased maintenance, while in-line transducers suffer from performance challenges and alignment issues.
Innovation Solution
An inline flow meter assembly with axially-aligned transducers that eliminate the need for signal reflection off pipe walls, featuring a housing with precise alignment and sealed transducers to measure flow rates accurately, even in varying pipe diameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If clamp-on transducers are used with traditional one-size-fits-all design, then manufacturing is simplified and inventory is minimized, but installation accuracy deteriorates due to multiple difficult-to-obtain installation details
Solution Approach 1:
The patent applies parameter changes by incorporating sensors that automatically detect installation parameters (pipe material, wall thickness, inside diameter, surface smoothness, eccentricity) and adjust the ultrasonic measurement parameters accordingly. This resolves the contradiction by maintaining manufacturing simplicity while achieving accurate measurements through automatic parameter adaptation.
Solution Approach 2:
The system performs self-service by automatically detecting installation conditions and configuring itself without requiring manual input from the installer. The transducer assembly autonomously gathers installation details and adjusts measurement parameters, eliminating the need for installers to manually obtain difficult-to-detect information while maintaining measurement precision.
2Measurement precision
If clamp-on transducers require multiple installation details, then measurement accuracy can be improved, but installation time and complexity increase
Solution Approach 1:
The transducer assembly autonomously detects all necessary installation parameters (pipe material, wall thickness, inside diameter, surface smoothness, eccentricity) without requiring manual measurement or input from the installer. This self-service capability maintains high measurement accuracy while dramatically reducing installation time and complexity.
Solution Approach 2:
The system performs preliminary detection of installation parameters automatically during the installation process itself, rather than requiring separate measurement steps. The sensors gather all necessary installation details as part of the normal installation procedure, eliminating additional time-consuming steps.
3Measurement precision
If clamp-on transducers use silicon grease to eliminate air gaps, then measurement accuracy is improved, but maintenance requirements increase
Solution Approach 1:
The patent extracts the grease dependency from the system by using direct-contact transducers that couple to the pipe wall without requiring intermediate grease layers. This eliminates air gaps through direct mechanical and acoustic coupling, removing the maintenance burden of grease replacement while maintaining signal transmission accuracy.
Solution Approach 2:
The system replaces the mechanical grease-based coupling system with a direct mechanical and acoustic coupling system. The transducers are designed to contact the pipe wall directly, substituting the grease intermediary with a solid-to-solid contact mechanism that requires no maintenance.
4Ease of operation
If clamp-on transducers are installed on pipes, then flow measurement is enabled, but susceptibility to external forces and positional shifts increases
Solution Approach 1:
The transducers are nested within a protective clamp assembly that is itself nested within the pipe structure. This nested configuration provides mechanical protection against external forces while maintaining the convenient clamp-on installation method. The transducers are securely held in position relative to the pipe wall.
Solution Approach 2:
The patent merges the transducer assembly with the clamp structure into a single integrated unit. This combined assembly is installed as one piece onto the pipe, providing both installation convenience and mechanical stability. The merged structure prevents relative movement between transducers and pipe, ensuring measurement reliability.
5Ease of operation
If in-line transducers are used to eliminate installation details, then installation simplicity is improved, but performance challenges and alignment issues worsen
Solution Approach 1:
The patent uses parameter changes by detecting installation conditions and automatically adjusting measurement parameters to compensate for variations in pipe geometry and transducer positioning. This maintains measurement reliability while preserving installation simplicity.
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor measurement quality and adjust parameters in real-time to compensate for alignment variations or installation imperfections. This feedback loop ensures reliable measurements even with simple installation methods.
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 inline flow meter assembly provides accurate and reliable flow rate measurements, reduces installation time, and minimizes inventory costs by eliminating the need for signal reflection, allowing measurement of low flow rates without turbulence or noise.
Implementation Method 1
a transducer positioned within the elongate portion and sealed from fluid flow past the outer cup portion, the transducer having a width perpendicular to the housing axis and greater than the width of the measurement channel, the transducer configured to generate an ultrasonic signal and to direct the ultrasonic signal through the measurement channel
Data Source
AI summary
A flow rate assembly can include a housing having a measurement channel extending along the housing axis and through a portion of the housing between the first and second ends of the housing, an outer cup portion positioned at least partly within the housing, and a transducer positioned within the outer cup portion and sealed from fluid flow past the outer cup portion, the transducer having a width perpendicular to the housing axis and greater than the width of the measurement channel, the transducer configured to generate an ultrasonic signal and to direct the ultrasonic signal through the measurement channel.