Ultrasonic Meter Transducer Gasket for Sealing and Back-Coupling Control
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Solution Overview
Problem
Ultrasonic meter transducers on steel pipes face issues with rust and signal back-coupling, which degrade performance and fail to meet regulatory standards for signal quality and environmental durability.
Innovation Solution
A gasket system comprising a loop of material with integrated gasket rings that match the diameter of bracket holes, providing both environmental sealing and acoustic attenuation, using non-rubber materials like polyethylene, polyether urethane, and NBR/PVC to prevent rust and reduce back-coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a common rubber gasket is used to seal the joint interface, then rust prevention is improved, but signal back-coupling increases causing deteriorated signal quality
Solution Approach 1:
The patent uses a composite gasket structure combining rubber material with an foam core or air gap configuration. This composite design allows the gasket to provide rust prevention through the rubber sealing surface while the foam or air gap provides acoustic attenuation to reduce signal back-coupling, thus resolving the contradiction between rust protection and signal quality.
Solution Approach 2:
The gasket is designed with different properties in different regions: the outer sealing surface uses rubber material for rust prevention, while the inner region contains a foam core or air gap for acoustic attenuation. This local differentiation allows each region to optimize its function, preventing rust at the interface while attenuating ultrasonic signals to reduce back-coupling.
2Reliability
If a small air gap is used to insulate ultrasounds, then signal back-coupling is reduced, but the interface becomes vulnerable to moisture and temperature variations causing rust
Solution Approach 1:
The patent combines air gap insulation with rubber sealing material in a composite gasket structure. The air gap or foam core provides ultrasonic insulation to reduce back-coupling, while the rubber material provides environmental sealing to prevent moisture and temperature-related rust, thus resolving the contradiction between signal quality and rust prevention.
Solution Approach 2:
The foam core or air gap acts as an intermediary element between the rubber sealing surfaces. It provides acoustic attenuation to reduce signal back-coupling while the surrounding rubber material provides environmental sealing, allowing the intermediary to mediate between the conflicting requirements of signal isolation and environmental protection.
3Object-affected harmful factors
If the joint interface is made extremely tight to seal out moisture, then rust prevention is improved, but signal back-coupling increases due to tighter fit
Solution Approach 1:
The composite gasket with rubber outer layer and foam or air gap inner structure allows tight sealing for rust prevention while the foam or air gap maintains acoustic isolation. The rubber provides the tight seal needed to exclude moisture, while the foam core or air gap prevents signal back-coupling even under tight mounting conditions.
Solution Approach 2:
The gasket applies different sealing pressures locally: the rubber outer surface provides tight sealing contact for environmental protection, while the foam core or air gap region maintains acoustic attenuation properties even when compressed, thus allowing tight fit without compromising signal quality.
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 solution effectively prevents rust and attenuates acoustic back-coupling, enhancing the signal-to-noise ratio and meeting regulatory standards for ultrasonic meter transducers in various environmental conditions.
Implementation Method 1
a loop of material comprises a material that provides both environmental sealing and acoustic attenuation
Implementation Method 2
a loop of material comprises a material that provides both environmental sealing and acoustic attenuation
Data Source
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AI summary
A system, method, and apparatus for attenuating acoustic back-coupling in a ultrasonic meter transducer that includes a gasket band (105) comprising a loop of a material, a first gasket ring (110) integrated in the gasket band configured to match a diameter of a first bracket hole, and a second gasket ring (115) integrated in the gasket band configured to match a diameter of a second bracket hole wherein the loop of material comprises a material that provides both environmental sealing and acoustic attenuation.