Ultrasonic Flow Meter W-Shaped Signal Path
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Solution Overview
Problem
Ultrasonic flow meters face challenges in achieving accurate and cost-effective measurements of fluid flow rates, particularly in environments where high flow velocities and fluid types vary, often requiring complex setups and electronic compensation.
Innovation Solution
A flow meter design featuring a pair of ultrasonic transducers and multiple reflectors defining a W-shaped signal path, with wedges that narrow the flow channel and inhibit expansion, enhancing linearity and signal quality, and eliminating the need for electronic compensation and flow guides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electronic compensation and flow guides are used to improve measurement accuracy, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent removes electronic compensation components and flow guides from the measurement system, relying instead on the geometric properties of the W-shaped ultrasonic path and wedge-induced flow acceleration to achieve accurate measurements without additional complex subsystems
Solution Approach 2:
The flow channel geometry itself, particularly the wedges, automatically performs the function of flow conditioning and signal path optimization without requiring external control systems or additional components, making the system self-regulating
2Measurement precision
If multiple reflectors and wedges are added to enhance signal quality and linearity, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent combines the functions of flow conditioning, signal path definition, and measurement into a single integrated W-shaped ultrasonic path geometry, eliminating the need for separate flow guides and multiple discrete reflectors while maintaining measurement precision
Solution Approach 2:
The W-shaped ultrasonic path serves multiple functions simultaneously: it defines the measurement volume, conditions the flow through wedge-induced acceleration, and provides the signal propagation path, thereby achieving multiple objectives with a single geometric configuration
3Measurement precision
If flow guides and flow straighteners are installed to improve flow uniformity, then measurement precision improves, but reliability decreases due to more components
Solution Approach 1:
The patent eliminates flow guides and flow straighteners from the system, using instead the wedge-shaped geometry to naturally accelerate and uniformize flow through geometric constraints alone, thereby reducing component count and potential failure points
4Ease of manufacture
If the flow channel is left unmodified to maintain simplicity, then ease of manufacture is improved, but measurement precision deteriorates due to poor linearity
Solution Approach 1:
The patent modifies only specific local regions of the flow channel by adding wedges at predetermined positions, rather than redesigning the entire flow channel geometry, thereby maintaining ease of manufacture while locally improving flow linearity and measurement 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 design provides more accurate and cost-effective flow rate measurements, reduces complexity, and minimizes the risk of component failure, while maintaining mechanical robustness and compatibility with various fluid types.
Implementation Method 1
A pair of ultrasonic transducers (4, 5) and a plurality of reflectors (6a, 6b, 6c) define a W-shaped path (7) for propagation of ultrasonic signals
Implementation Method 2
A pair of ultrasonic transducers (4, 5) and a plurality of reflectors (6a, 6b, 6c) define a W-shaped path (7) for propagation of ultrasonic signals
Implementation Method 3
One or several wedges are arranged in the fluid path and narrow the flow channel. Also, an expansion of the fluid path in the vicinity of the one or several wedges is inhibited
Data Source
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AI summary
Ultrasonic flow meter. A flow meter (1) comprising: a housing (3) and a flow channel (2) arranged inside the housing (3); two ultrasonic transducers (4, 5) disposed along the flow channel (2) and arranged at a distance, wherein the first ultrasonic transducer (4) is configured to emit an ultrasonic signal into the flow channel (2) and the second ultrasonic transducer (5) is configured to receive the ultrasonic signal emitted by the first ultrasonic transducer (4) into the flow channel (2); three reflectors (6a, 6b, 6c) arranged inside the flow channel (2), the three reflectors (6a, 6b, 6c) being configured to reflect the ultrasonic signal emitted by the first ultrasonic transducer (4) multiple times on its way to the second ultrasonic transducer (5) such that a W-shaped path (7) of the ultrasonic signal is formed; wherein the flow channel (2) is formed by a tubular member (9) inside the housing (3). The flow channel (2) comprises a flow restriction member (8) and an outlet port (11), the flow restriction member (8) being interposed between two out of the three reflectors (6a, 6b, 6c), wherein the flow restriction member (8) comprises a first wedge (16b, 16c) having a first sloped surface; and wherein the first wedge (16b, 16c) comprises a first plurality of teeth (17c - 17e) protruding from the first sloped surface.