Vibration Flow Meter Pressure Difference Measurement
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Solution Overview
Problem
Existing measuring systems for pressure difference measurement in flowing media, particularly in industrial settings, require complex modifications and additional sensors, leading to increased design complexity and calibration efforts, making them less accurate and more costly.
Innovation Solution
A measuring system comprising a vibration-type transducer with an electro-mechanical oscillation exciter and sensors that generates primary signals for mass flow, density, and viscosity, allowing for the calculation of pressure difference using existing oscillation sensors and transmitter electronics, without the need for additional sensors or complex modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If additional sensors and complex modifications are used for pressure difference measurement, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The existing vibration-type measuring transducer is made multi-functional by enabling it to measure pressure difference in addition to its original measurement capabilities. The transmitter electronics processes existing sensor signals (damping and pressure difference) to generate pressure difference measurements, eliminating the need for dedicated pressure sensors and reducing system complexity while maintaining measurement accuracy
2Measurement precision
If additional sensors and complex modifications are used for pressure difference measurement, then measurement accuracy is improved, but manufacturing cost increases
Solution Approach 1:
The measuring transducer designed for mass flow measurement is made multi-functional to also perform pressure difference measurement. By utilizing existing components and signals (damping and pressure difference signals from the vibration transducer), the invention eliminates the need for additional dedicated sensors and complex modifications, thereby reducing manufacturing costs while maintaining measurement accuracy
3Measurement precision
If additional sensors and complex modifications are used for pressure difference measurement, then measurement accuracy is improved, but calibration effort increases
Solution Approach 1:
The transmitter electronics is enhanced to process existing sensor signals (damping and pressure difference) and generate pressure difference measurements. This multi-functional approach utilizes already-calibrated signals from the vibration transducer, avoiding the need for separate calibration procedures for additional pressure sensors and significantly reducing calibration effort and complexity
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 precise and accurate measurement of pressure differences in flowing media, reducing complexity and cost by leveraging existing technologies and parameters, suitable for both laminar and turbulent flow conditions.
Implementation Method 1
at least one electro-mechanical, for example, electrodynamic, oscillation exciter for exciting and/or maintaining vibrations of the at least one measuring tube
Implementation Method 2
a, for example, electrodynamic, first oscillation sensor for registering, for example, inlet-side vibrations of at least the at least one measuring tube and for producing a first primary signal
Implementation Method 3
generates, by means of the first primary signal as well as with application of a damping, measured value... a pressure difference, measured value
Data Source
AI summary
The measuring system comprises: A measuring transducer of vibration-type, through which medium flows during operation and which produces primary signals corresponding to parameters of the flowing medium; as well as a transmitter electronics electrically coupled with the measuring transducer for activating the measuring transducer and for evaluating primary signals delivered by the measuring transducer. The measuring transducer includes: At least one measuring tube for conveying flowing medium; at least one electro-mechanical, oscillation exciter for exciting and/or maintaining vibrations of the at least one measuring tube; as well as at least a first oscillation sensor for registering vibrations at least of the at least one measuring tube and for producing a first primary signal of the measuring transducer representing vibrations at least of the at least one measuring tube. The transmitter electronics, in turn, delivers at least one driver signal for the exciter mechanism for effecting vibrations of the at least one measuring tube and generates, by means of the first primary signal, as well as with application of a damping, measured value, which represents an excitation power required for maintaining vibrations of the at least one measuring tube, and, respectively, a damping of vibrations of the at least one measuring tube as a result of inner friction in the medium flowing in the measuring transducer, a pressure difference, measured value, which represents a pressure difference occurring between two predetermined reference points in the flowing medium.