Ultrasonic Flow Meter Transducer Assembly Spacer Positioning
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Solution Overview
Problem
Conventional ultrasonic flow meter transducer assemblies require labor-intensive and time-consuming manufacturing processes to properly position piezoelectric elements for optimal signal quality, which increases costs and reduces efficiency.
Innovation Solution
The use of a piezoelectric capsule with spacers within the housing to maintain the axial and radial position of the piezoelectric element, allowing for a simpler and faster manufacturing process by using spacers to hold the element in place during the curing of the matching layer, eliminating the need for a specialized positioning tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional separate transducer and housing assembly is used, then manufacturing and assembly complexity increases, but integration and miniaturization are limited
Solution Approach 1:
The patent merges the transducer and housing into a single integrated unit where the transducer is directly mounted within the housing structure. The housing serves dual functions as both structural enclosure and mounting platform for the transducer, eliminating separate assembly steps and reducing overall component count while maintaining functional integrity
Solution Approach 2:
The housing is designed to perform multiple functions simultaneously: providing structural support, serving as acoustic coupling interface, housing electronic components, and enabling sensor alignment. This multi-functionality reduces the need for additional specialized components and simplifies the overall assembly architecture
2Manufacturing precision
If conventional manufacturing processes are used, then manufacturing precision is limited, but production cost and time increase
Solution Approach 1:
The housing is pre-designed with integrated mounting features, precision bores, and alignment elements during the initial manufacturing process. These preliminary structural preparations enable accurate sensor positioning and reduce the need for post-assembly adjustments, thereby improving both precision and manufacturing efficiency
Solution Approach 2:
The patent employs advanced manufacturing parameters and processes such as precision machining tolerances, controlled thermal processing, and optimized material selection to achieve high sensor alignment precision. These parameter optimizations allow for tighter tolerances and better repeatability without proportionally increasing manufacturing time or cost
3Ease of operation
If transducer and housing are separately assembled, then assembly flexibility is maintained, but assembly time and potential misalignment increase
Solution Approach 1:
The transducer and housing are combined into a pre-assembled unit or integrally manufactured component, eliminating the need for separate assembly operations. This merger reduces assembly steps, minimizes alignment operations, and decreases overall assembly time while maintaining ease of installation as a complete unit
4Measurement precision
If acoustic coupling elements are added to improve signal transmission, then measurement precision improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The housing material and structure are selected to provide both structural support and acoustic coupling functions. The housing itself serves as the acoustic coupling element through its material properties and geometric design, eliminating the need for separate acoustic coupling components while maintaining 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 approach simplifies the manufacturing process, reduces costs, and ensures accurate positioning of the piezoelectric element, leading to improved ultrasonic signal quality and flow measurement accuracy in ultrasonic flow meters.
Implementation Method 1
an ultrasonic transducer is positioned at a first position relative to the flow tube. The ultrasonic transducer is oriented at an angle such that an ultrasonic beam emitted by the transducer passes through the fluid sample in the flow tube
Implementation Method 2
an ultrasonic beam emitted by the transducer passes through the fluid sample in the flow tube at an angle to a direction of fluid flow in the flow tube
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A transducer assembly for an ultrasonic flow meter comprises a piezoelectric capsule. In an embodiment, the piezoelectric capsule includes a housing having a central axis, a first end, a second end opposite the first end, and a first inner chamber extending axially from the first end. In addition, the piezoelectric capsule includes a piezoelectric element disposed in the first inner chamber. Further, the piezoelectric element includes a plurality of spacers disposed in the first inner chamber between the piezoelectric element and the housing.