Coriolis Flow Meter Wing Strips Leverage Amplification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Coriolis mass flow meters face challenges in achieving sufficient accuracy due to the small degree of displacement caused by the Coriolis force, which limits the detection sensitivity and accuracy of flow rate measurements.
Innovation Solution
The implementation of wing-shaped strips protruding from the measurement tube enhances the Coriolis force, utilizing the principle of leverage to amplify the displacement, thereby improving detection sensitivity through enhanced Coriolis force detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a simple measurement tube is used, then the device complexity is low, but the detection sensitivity is insufficient due to small displacement
Solution Approach 1:
The measurement tube is segmented into multiple sections with different cross-sectional areas. The first section has a smaller cross-sectional area than the second section, creating a transition zone that amplifies the displacement caused by Coriolis force. This segmentation allows the measurement tube itself to act as an amplification mechanism without adding external complex components.
Solution Approach 2:
The cross-sectional area parameter of the measurement tube is varied along its length. By changing the cross-sectional area from the first section to the second section, the patent creates a parameter gradient that enhances the displacement amplitude. This parameter change approach improves detection sensitivity while maintaining the simplicity of the overall device structure.
2Measurement precision
If the measurement tube displacement is small, then the device structure is simple, but the flow rate measurement accuracy is insufficient
Solution Approach 1:
The patent introduces a dimensional change in the measurement tube by varying its cross-sectional area along the flow direction. This creates a three-dimensional structure with changing geometry that amplifies the displacement in the measurement direction. The dimensional variation transforms the uniform tube into a tapered or stepped structure that enhances sensitivity.
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 approach significantly enhances the detection sensitivity of the Coriolis mass flow meter, allowing for more accurate measurement of flow rates by amplifying the displacement caused by the Coriolis force, leading to improved measurement precision.
Implementation Method 1
A Coriolis force of Fc = -2 mω x ν, where ω is an angular speed of the oscillator 3 in a direction of oscillation and v is a flow velocity of the fluid to be measured, works, and the mass flow may be measured by detecting an amplitude of the oscillation
Implementation Method 2
displacement detection sensors 5a and 5b are mounted on an outbound tube 4a and an inbound tube 4b of the measurement tube 1 at both sides of the curved portion
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A Coriolis mass flow meter has a holder (20) mounted on a U-shaped curved tube portion (11a) of a measurement tube (11) formed of a synthetic resin, and wing-shaped strips (24a, 24b) having a plate shape protrude outward from the holder. Distortion caused by a Coriolis force which depends on a flow rate is generated symmetrically with respect to a center line passing through a distal end of the curved tube portion and parallel to an outbound tube (11b) and an inbound tube (11c). Therefore, the outbound tube and the inbound tube are twisted about the center line of the holder, and an amount of distortion is enhanced by the wing-shaped strips under the principle of leverage for detection.