Ultrasonic Flow Meter Inserts for Reduced Flow Disruption
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Solution Overview
Problem
Existing flow meters with ultrasonic transducers face issues such as measurement interference due to material dependence, complex structures, flow disruptions, and limited geometry, leading to measurement errors and high device engineering complexity.
Innovation Solution
A flow meter design featuring ultrasonic transducers mounted on inclined support surfaces with contact boards connected to a main PCB, a compact control unit, and a measuring channel insert with reflectors, allowing easy assembly and adaptation to different pipe diameters using interchangeable inserts, minimizing device complexity while maintaining optimal measuring accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ultrasonic transducers are mounted directly in the flow or with protruding housing parts, then the transducers can be easily installed, but separation and vortex formation occur leading to measurement errors
Solution Approach 1:
The ultrasonic transducers are nested within a recess in the pipe section wall, with the measuring insert fitting into the recess. This nested arrangement eliminates protruding parts that would disrupt flow, while maintaining easy installation through the recess mechanism. The transducers are housed within the wall thickness, preventing vortex formation and measurement errors.
2Measurement precision
If a measuring insert with ultrasonic transducers is inserted into a recess, then flow disruption is minimized, but the structure becomes more complex
Solution Approach 1:
The measuring insert combines multiple functions into a single component: it houses the ultrasonic transducers, provides reflectors for signal guidance, forms the measuring channel geometry, and interfaces with the pipe section recess. This merging reduces the number of separate parts and simplifies assembly, despite the integrated complexity of the insert itself.
3Measurement precision
If reflectors are arranged diametrically to the ultrasonic transducers, then signal guidance is achieved, but at least two reflectors are required increasing device complexity
Solution Approach 1:
The measuring insert serves as a multi-functional element that integrates the reflector function directly into its structure. The reflectors are positioned on the measuring channel walls as part of the insert design, allowing a single insert to provide signal guidance for both transducers without requiring separate reflector components. This universal design reduces the total component count while maintaining signal quality.
4Ease of operation
If the measuring channel geometry is constrained by pipe section recess, then installation is simplified, but geometry flexibility is limited
Solution Approach 1:
The measuring insert is designed as a modular component that can be selectively installed in different pipe section recesses. The insert itself contains the geometry-defining features (measuring channel shape, reflector positions), allowing the same insert design to adapt to various pipe diameters and configurations. This segmentation enables geometry flexibility without complicating the installation process.
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 design ensures minimal device complexity, reduced measurement noise, and improved flow dynamics with enhanced signal quality and repeatability, supporting standard ultrasonic sensors and cost-effective manufacturing.
Implementation Method 1
two ultrasonic transducers mounted at a distance from each other on a section of pipe in a so-called 'clip-on solution,' with both transducers acting as transmitter and receiver. The measurement signals are coupled diagonally through the pipe wall into the fluid.
Implementation Method 2
Additionally, the measuring insert features reflectors for the measurement signals.
Data Source
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AI summary
Disclosed is a flowmeter having an optimized cross-sectional flow area.