Vibratory Cavity Density Meter Segmentation
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Solution Overview
Problem
Existing vibratory density meters face challenges such as sensitivity to unstable process conditions, accuracy issues, and difficulty in integrating with systems measuring fluid density in tanks, especially when dealing with viscous materials or multiphase fluids.
Innovation Solution
A vibratory cavity density meter design featuring a pipe with a self-enclosed end and transducers to induce and sense vibrations, allowing measurement of fluid density without bypassing the container, accommodating various container sizes and configurations, and minimizing sensitivity to process conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fork meter is used to measure density directly in process material, then installation flexibility is improved, but measurement accuracy deteriorates due to high damping from immersion
Solution Approach 1:
The device segments the measurement system into two parts: a vibration-generating element (fork or tuning fork) that remains outside the process material, and a vibration-sensing element that measures the natural frequency of the material itself. This segmentation allows the sensing element to be immersed in the material for accurate measurement while the generating element remains external, avoiding the damping problems of fully immersed forks.
Solution Approach 2:
The patent uses the process material itself as an intermediary medium. Instead of vibrating the fork directly in the material (which causes damping), the fork generates vibrations that are transmitted through the material, and the material's natural frequency response is measured. This intermediary approach allows indirect measurement that avoids direct immersion damping while maintaining accuracy.
2Measurement precision
If a tube density meter is used to measure density, then measurement accuracy is improved, but ease of operation deteriorates due to bypass requirements and flow dependencies
Solution Approach 1:
The patent extracts the vibration generation function from the measurement location. The fork that generates vibrations is taken out of the process material and placed externally, while only the sensing portion remains in contact with the material. This extraction eliminates the need for bypass loops and continuous flow requirements, allowing direct installation in tanks and static containers while maintaining high measurement accuracy.
Solution Approach 2:
Instead of immersing the vibration source in the material (traditional fork meter approach), the patent inverts the approach by placing the vibration source outside the material and using the material's natural frequency response as the measurement signal. This inversion eliminates flow dependencies and bypass requirements while maintaining accuracy.
3Adaptability or versatility
If a vibratory sensor is immersed directly in process material, then installation flexibility is improved, but sensitivity to unstable process conditions worsens
Solution Approach 1:
The device segments the vibration generation and sensing functions, with the generation element remaining external to the process material. This segmentation isolates the sensing element from unstable process conditions such as high viscosity and multiphase flow, allowing the sensor to measure natural frequency reliably while maintaining installation flexibility for direct tank mounting.
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
Enables accurate measurement of fluid density without the need for fluid flow, offering greater flexibility and stability across different process conditions compared to traditional meters.
Implementation Method 1
at least one transducer coupled to the pipe, the at least one transducer configured to induce and sense a vibration in the pipe
Implementation Method 2
measuring the natural frequency of the resulting system to measure density
Data Source
Figure 1
Figure 1A~1B
Figure 2
AI summary
A vibratory cavity density meter (100-300) is provided. The vibratory cavity density meter (100-300) includes a pipe (110-310) extending from a first end (110a-310a) to a second end (110b-310b). The first end (110a-310a) includes an aperture (114-314) configured to receive a material from a container (10) and the second end (110b-310b) is self-enclosed so as to contain the material in the pipe (110-310). The vibratory cavity density meter (100-300) also includes at least one transducer (118, 218) coupled to the pipe (110-310), the at least one transducer (118, 218) configured to one of induce and sense a vibration in the pipe (110-310) to measure a property of the material.