Differential Pressure Meter Constant Beta Edge Boundary
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Solution Overview
Problem
Differential pressure meters face calibration issues when the flow rate of fluids changes or when different types of fluids are measured, as the beta ratio and coefficient of discharge change, requiring re-calibration and affecting accuracy.
Innovation Solution
The implementation of interchangeable or permanently coupled fluid displacement members that maintain a constant beta edge boundary relative to the taps, allowing for a single calibration to be used across various beta ratios and fluid types, ensuring consistent coefficient of discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If differential pressure meters are calibrated for specific flow rate ranges and fluid types, then measurement accuracy is improved for those specific conditions, but the device requires re-calibration when flow rates or fluid types change, increasing maintenance complexity
Solution Approach 1:
The patent applies universality by designing fluid displacement members with constant relative geometries that maintain a constant beta edge boundary across different beta ratios. This allows a single calibration to be used for multiple fluid displacement members with different beta ratios, making the measurement system universal across varying flow rates and fluid types without requiring re-calibration for each specific condition
Solution Approach 2:
The patent utilizes parameter changes by varying the beta ratio (the ratio of the diameter of the beta edge boundary to the inside diameter of the conduit) while maintaining a constant beta edge boundary position. This allows the same calibrated system to measure different flow rates by changing the beta ratio parameter, thereby expanding the measurement range without sacrificing accuracy or requiring re-calibration
2Ease of manufacture
If differential pressure meters use fixed beta ratios, then calibration is simplified for specific applications, but the device cannot accurately measure varying flow rates or different fluid types without re-calibration
Solution Approach 1:
The patent achieves universality by creating a family of fluid displacement members with different beta ratios that all share a constant beta edge boundary. This allows the measurement system to handle multiple flow rates and fluid types with a single calibration, combining calibration simplicity with broad measurement versatility
Solution Approach 2:
The patent applies dynamics by allowing the beta ratio to vary while maintaining the constant beta edge boundary position. This dynamic adjustment of the beta ratio parameter enables the system to adapt to different flow conditions without changing the fundamental calibration, thereby achieving both calibration simplicity and measurement versatility
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 enhances the accuracy and ease of use of differential pressure meters by allowing a single calibration to be applied across different fluid displacement members and beta ratios, reducing maintenance and increasing accuracy across varying fluid conditions.
Implementation Method 1
As the fluid flows around the displacement member, the fluid displacement member causes differential pressure in the fluid. The difference in pressure may be measured via taps disposed on the upstream and downstream portions of the fluid displacement member.
Data Source
AI summary
Systems and methods are disclosed for differential pressure meters having a constant beta edge boundary defined by fluid displacement members of the meter. In some embodiments, a differential pressure meter may have an interchangeable fluid displacement member, such that each fluid displacement member replaced in the meter maintains a constant beta edge boundary. In other embodiments, a family of differential pressure meters having permanent fluid displacement members may maintain a constant beta edge boundary for each meter of the family of differential pressure meters.