Parallel Coil Oscillation Exciters for Vibration Transducers
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Solution Overview
Problem
Existing vibronic measuring devices, such as Coriolis mass flow measuring devices, face issues with electrical current interruptions and limited mechanical power due to series-connected coils, which can lead to total system failure and require increased inductance for higher viscosity measurements, complicating safety considerations in hazardous zones.
Innovation Solution
The measuring transducer employs two electrodynamic oscillation exciters with coils connected in parallel, allowing for increased mechanical power while maintaining low inductive reactance, thus enhancing driving forces and reducing the risk of system failure and safety concerns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the two coils are connected in series, then the total inductance increases allowing higher mechanical power, but the inductive reactance increases causing slower power response and requiring higher voltage
Solution Approach 1:
The patent merges the electrical connection of the two coils from series to parallel configuration. This combining approach allows the system to maintain the mechanical power output while reducing the total inductance and inductive reactance, thereby improving the power response time without requiring higher voltage levels.
2Power
If the inductance of the oscillation exciter coils is increased to provide higher mechanical power, then the excitation power can be increased, but the total inductance and inductive reactance increase causing slower power response
Solution Approach 1:
The patent changes the electrical connection parameter from series to parallel configuration. This parameter change reduces the total inductance while maintaining the mechanical power output capability, thereby improving the power delivery speed without sacrificing excitation power.
3Device complexity
If the coils are connected in series, then the system is simpler to design, but any interruption in the current circuit leads to total system failure
Solution Approach 1:
The patent segments the electrical connection from a single series circuit into two independent parallel circuits. This segmentation ensures that if one coil or connecting line fails, the other remains functional, thereby improving system reliability while maintaining relatively simple circuit design.
4Power
If the total inductance is increased to provide higher mechanical power, then the excitation capability is improved, but the energy storage increases requiring more stringent safety measures in hazardous zones
Solution Approach 1:
The patent changes the connection configuration parameter from series to parallel, which reduces the total inductance and stored energy while maintaining the mechanical power output. This parameter change lowers the safety risk in hazardous zones without sacrificing excitation capability.
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 configuration enables higher mechanical power generation and reduced inductive reactance, improving the reliability and safety of the measuring transducer, especially in regions requiring intrinsic safety for electrical operating means.
Implementation Method 1
a first oscillation exciter having a first coil secured to the first measuring tube and a cup shaped first permanent magnet secured to the second measuring tube and movable relative to the first coil as well as a second oscillation exciter having a second coil secured to the third measuring tube and constructed equally to the first coil, and having a second permanent magnet secured to the fourth measuring tube, movable relative to the second coil
Implementation Method 2
by means of the two oscillation exciters changing fed electrical power into mechanical power, driving forces effecting mechanical oscillations of the measuring tubes are introduced at the same time into the measuring tubes
Implementation Method 3
For registering such mechanical oscillations of the measuring tubes and for producing oscillation measurement signals representing oscillatory movements of the measuring tubes, each measuring transducer further includes corresponding oscillation sensors
Implementation Method 4
oscillations which are suitable to induce in the flowing fluid Coriolis forces dependent on a mass flow rate
Data Source
AI summary
The measuring transducer comprises four measuring tubes (181, 182, 183, 184) as well as two oscillation exciters and (51, 52). The oscillation exciter (51) includes a coil (511) secured to the measuring tube (181) as well as a permanent magnet (512) secured to the measuring tube (182) and movable relative to the coil (511) and the oscillation exciter (52) includes a coil (521) secured to the measuring tube (183) as well as a permanent magnet (522) secured to the measuring tube (184) and movable relative to the coil (521). In the case of the measuring transducer of the invention, the coils (511, 521) are connected electrically in parallel with one another.