Ultrasonic Flow Meter Damping Element and Sealing Ring
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Solution Overview
Problem
Existing ultrasonic flow measuring devices face challenges in effectively transferring signals into a gaseous or liquid medium while minimizing body sound transfer, which can lead to signal interference and reduced accuracy.
Innovation Solution
The arrangement includes a housing with a damping element connected to the ultrasonic transducer and housing wall, featuring oscillatory nodes and sealing rings to dampen body sound, ensuring that the ultrasonic signals are transferred into the medium without significant lateral sound transfer, and providing mechanical support and protection from the medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a signal radiating bending plate is used to center the ultrasonic signal, then the ultrasonic signal is centered in the middle, but the radiating area is very small
Solution Approach 1:
The bending plate is divided into multiple segments (first bending plate segment, second bending plate segment) that can independently vibrate. This segmentation allows the plate to maintain signal centering while increasing the effective radiating area through the coordinated movement of multiple segments.
Solution Approach 2:
The invention introduces a radial support structure that provides support in the radial dimension while allowing axial vibration. This dimensional approach enables the bending plate to achieve both signal centering and extended radiating area by combining axial and radial structural features.
2Device complexity
If the ultrasonic transducer is connected directly to the housing wall, then the structure is simple, but body sound is transferred to the housing wall causing signal interference
Solution Approach 1:
A damping element is introduced as an intermediary component between the ultrasonic transducer and the housing wall. This damping element absorbs and dissipates body sound vibrations, preventing their transfer to the housing wall while maintaining the structural connection needed for ultrasonic signal transmission.
Solution Approach 2:
The damping element converts the harmful body sound vibrations into beneficial damping effects. By positioning sealing rings at oscillatory nodes of the damping element, the invention utilizes the natural vibration characteristics to maximize body sound cancellation while maintaining mechanical support.
3Object-affected harmful factors
If sealing rings are positioned at oscillatory nodes of the damping element, then body sound transfer is minimized, but the positioning requires precise knowledge of oscillatory node locations
Solution Approach 1:
The damping element's oscillatory nodes are determined by the element's own physical characteristics and vibration mode, rather than requiring external measurement or complex calculation. The sealing rings are positioned at these self-determined nodes, allowing the system to utilize its own vibrational properties for optimal sealing and body sound cancellation.
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 solution effectively cancels body sound, reduces signal interference, and maintains mechanical support, enhancing the accuracy and reliability of ultrasonic flow measurements by positioning sealing rings at oscillatory nodes and using a hollow-cylindrical damping element with annular grooves and sealing elements.
Implementation Method 1
the damping element is provided between the ultrasonic transducer and the housing wall for body sound damping
Implementation Method 2
the damping element has at least one, especially a number of, oscillatory nodes
Implementation Method 3
the ultrasonic transducer has a medium-contacting surface, from which ultrasonic signals are transferred into a gaseous or liquid medium
Implementation Method 4
there is arranged between the damping element and the housing wall at least a first sealing ring, which is positioned at a height of an oscillatory node
Data Source
AI summary
An arrangement, comprising a housing wall, an ultrasonic transducer and a damping element with a longitudinal axis, which damping element connects the ultrasonic transducer with the housing wall. The ultrasonic transducer has an end piece with a medium-contacting surface, from which ultrasonic signals are transferred into a gaseous or liquid medium. The damping element is provided for body sound damping between the ultrasonic transducer and the housing wall, and wherein the damping element has at least one, especially a number of, oscillatory nodes, characterized in that there is arranged between the damping element and the housing wall at least a first sealing ring, which is positioned at a height of an oscillatory node.