LTCC Ceramic Coriolis Tube Wall Integration
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Solution Overview
Problem
Existing Coriolis measuring devices face challenges in minimizing the influence of sensor or exciter components on measuring tube vibrations, particularly in small tubes, which disrupts the accuracy of density and mass flow measurements.
Innovation Solution
A Coriolis measuring tube with a sintered LTCC ceramic wall that integrates electrical or electronic components, such as coils, directly into the measuring tube wall, reducing mechanical interference and allowing for efficient vibration excitation and sensing while minimizing mechanical loads on electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electrical or electronic components (coils, magnets) are attached to measuring tubes, then excitation and sensing functions are achieved, but the vibration behavior of measuring tubes is disrupted
Solution Approach 1:
The patent integrates electrical and electronic components directly into the measuring tube wall through co-sintering in the LTCC process. The measuring tube wall itself becomes the component carrier, eliminating separate attachments. This merging of structure and function reduces mechanical interference while maintaining excitation and sensing capabilities.
Solution Approach 2:
The patent uses LTCC (Low Temperature Co-Fired Ceramic) composite material that combines ceramic properties with embedded electrical conductors. This composite structure allows coils and other electronic components to be integrated within the tube wall, reducing disruption to vibration behavior while maintaining functional performance.
2Measurement precision
If components are integrated into the measuring tube wall, then mechanical interference is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent performs all component integration during the tube manufacturing process itself. Electrical conductors, coils, and other components are co-sintered into the LTCC tube wall in a single manufacturing step, rather than being added later. This preliminary integration simplifies the overall manufacturing process despite the complexity of the integrated structure.
3Measurement precision
If measuring tube size is reduced for better measurement resolution, then measurement accuracy improves, but the influence of components on vibrations increases
Solution Approach 1:
By merging the measuring tube wall with the component carrier function, the patent eliminates separate components that would disproportionately affect small tube vibrations. The integrated structure ensures that excitation and sensing elements are seamlessly incorporated, minimizing their disruptive influence even in small-diameter tubes where measurement precision is critical.
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 reduces the disruption of measuring tube vibrations by integrating components within the ceramic structure, enhancing measurement accuracy and allowing for smaller, more complex geometric designs, while maintaining reliable electrical connections.
Implementation Method 1
When a coil is used as an exciter component, it is supplied with an electric current to create a magnetic field and can be induced to excite measuring tube vibrations using a further magnetic field.
Implementation Method 2
When a coil is used as a sensor component, the coil is moved relative to a magnetic field by measuring tube vibrations, thus inducing measurable electrical voltages that can be used to evaluate measuring tube vibrations.
Implementation Method 3
the measuring tube wall has a sintered ceramic or is made of a sintered ceramic. In addition, the ceramic is an LTCC ceramic and comprises at least one electrical or electronic component
Data Source
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AI summary
The invention relates to a measurement tube (1) of a Coriolis sensing element (10) for measuring a density and a mass flow rate of a medium flowing through a measurement tube, said measurement tube (11) having a measurement tube wall (11.1) and a measurement tube lumen (11.2), characterised in that the measurement tube wall has a sintered ceramic material or is produced from a sintered ceramic material.