Flow-Through Device with Coupling Surfaces for Accurate Flowmeter Signals
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Solution Overview
Problem
Existing flow measurement systems, particularly clamp-on flow measuring devices, face challenges in achieving accurate measurements due to gas phases in the signal path caused by cavities filled with ambient air, leading to poor signal transmission.
Innovation Solution
A flow-through device with contact surfaces that secrete a coupling agent when subjected to contact pressure, ensuring a liquid phase in the signal path and improving signal transmission by displacing gas phases, using materials like styrene block copolymers and polybutylene terephthalate for the contact surfaces and measuring body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If clamp-on flow measuring devices are used with cavities filled with ambient air, then the device structure is simple, but gas phases in the signal path cause poor signal transmission and reduce measurement accuracy
Solution Approach 1:
A coupling agent is introduced as an intermediary substance between the flowmeter and the fluid-conducting line. This coupling agent fills the cavities and eliminates gas phases in the signal path, enabling effective transmission of ultrasonic signals while maintaining a relatively simple clamp-on device structure
Solution Approach 2:
The contact surfaces are designed to change their physical state by secreting a coupling agent when contact pressure is applied. This parameter change transforms the surfaces from a dry state to a state with liquid coupling material, ensuring optimal signal transmission without complex additional components
2Reliability
If contact surfaces secrete coupling agent under contact pressure, then signal transmission is improved, but the material selection and manufacturing process become more complex
Solution Approach 1:
The contact surfaces are made from composite materials such as styrene block copolymers or polybutylene terephthalate that inherently possess the ability to secrete coupling agents under pressure. This integrates the coupling agent function directly into the material structure, simplifying manufacturing compared to applying separate coatings or layers
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
Enhances the accuracy of flow measurements by improving signal transmission through the use of a coupling agent, allowing for better detection of measurement variables such as volume or mass flow.
Implementation Method 1
the at least two contact surfaces are designed to secrete a coupling agent when a contact pressure is applied
Implementation Method 2
the coupling agent, which is preferably liquid, reduces gas phases in the signal path. Gas phases in the signal path arise in particular from cavities that are filled with a gaseous fluid, such as ambient air, and lie between the contact surfaces and the flowmeter. Due to the secretion of the contact agent, the gaseous fluid can be displaced by the coupling agent, so that there is now a liquid phase in the signal path
Implementation Method 3
a flowmeter, in particular an ultrasonic flowmeter, for detecting the measurement variable... in which the flowmeter couples an input signal, preferably an ultrasonic signal, into the measurement region via the contact surfaces and receives an output signal based on the input signal
Data Source
AI summary
A system for detecting a measurement variable of a fluid being conducted in a fluid-conducting line, having a flowmeter for detecting the measurement variable, a flow-through device for arranging on the fluid-conducting line and for attaching the flowmeter. The flowmeter has a first and second connection and a measurement region which is arranged between the first connection and the second connection and which can be coupled to the flowmeter. The first connection, the measurement region, and the second connection define a flow path for the fluid through the flow-through device.