Vibrating Measuring Device Drive Chain Mode Switching
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Solution Overview
Problem
Existing vibrating measuring devices, such as Coriolis flow meters, face difficulties in switching between different operating modes due to the limitations of single fixed drive chains, which are not capable of generating multiple modes, especially when analog hardware is involved.
Innovation Solution
A system with multiple drive chains, each equipped with filters, phase shift algorithms, and gain adjusting algorithms, allows for the selection of the appropriate drive chain based on conditions like entrained gas presence, pick-off signal noise, or through a lookup table, enabling the generation of different drive frequencies and modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single fixed drive chain is used, then the device structure is simple, but it is not capable of generating multiple drive modes
Solution Approach 1:
The patent applies dynamics by making the drive chain selectable and configurable rather than fixed. Multiple drive chains are provided, each capable of generating different drive modes, and the system dynamically selects the appropriate drive chain based on operating conditions. This resolves the contradiction by enabling mode versatility while managing complexity through intelligent selection rather than permanent multi-mode capability in all components.
Solution Approach 2:
The patent implements universality by designing drive chains that can generate multiple drive modes (first bend, second bend, torsional, radial) through configurable parameters. Each drive chain is designed to be multi-functional, capable of producing different vibration modes by adjusting drive frequency and phase relationships, thereby eliminating the need for separate dedicated drive chains for each mode.
2Adaptability or versatility
If analog hardware is used in the drive chain, then the circuit is stable, but it cannot switch between different drive modes
Solution Approach 1:
The patent replaces fixed analog hardware with digitally controllable drive chains that use electronic signal generation and processing. The drive chains employ digital signal processing techniques including filtering, phase shifting, and frequency modulation to achieve mode switching, substituting rigid analog circuitry with flexible electronic control systems that maintain reliability through programmable logic and error correction.
Solution Approach 2:
The patent applies parameter changes by modifying drive frequency, phase angle, and amplitude parameters to switch between different drive modes. The system changes operational parameters of the drive chains rather than physically reconfiguring hardware, enabling seamless transitions between first bend, second bend, torsional, and radial modes while maintaining system stability through controlled parameter adjustment.
3Measurement precision
If a single drive frequency is used, then the drive chain is simple, but the measurement accuracy is limited to specific operating conditions
Solution Approach 1:
The patent applies dynamics by implementing variable frequency drive capability where the drive frequency can be dynamically adjusted based on operating conditions such as flow rate, fluid properties, and detected resonance peaks. The system continuously monitors performance and adjusts drive frequency to maintain optimal measurement accuracy across varying conditions, transforming the static single-frequency approach into a dynamic multi-frequency system.
Solution Approach 2:
The patent implements preliminary action by pre-configuring multiple drive chains with different frequency ranges and characteristics before operation. The system performs preliminary characterization of the measurement range and pre-selects appropriate drive chains based on expected operating conditions, enabling accurate measurements across a wide range of frequencies without requiring real-time complex adjustments during actual measurement.
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 across a wider range of operating conditions by allowing switching between low and high frequency modes, improving performance and accuracy by selecting the suitable drive chain according to specific conditions.
Implementation Method 1
The drive signal causes the drive to vibrate the one or more conduits at the drive frequency in the drive mode. For example, the drive signal may be a periodic electrical current transmitted to the coil.
Implementation Method 2
The pick-off is typically a magnet/coil combination, with the magnet typically being affixed to one conduit and the coil being affixed to a mounting structure or to another conduit. The pick-off signal is transmitted to the one or more electronics
Data Source
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AI summary
The present invention relates to a system, method, and computer program product for generating a drive signal for a vibrating measuring device (5). A drive chain (C1, C2, C3, CN) is selected from at least two drive chains (C1, C2, C3, CN). Each drive chain (C1, C2, C3, CN) modifies at least one pick-off signal to generate the drive signal. Each drive chain (C1, C2, C3, CN) generates a different mode of vibration in the at least one conduit (103A). The drive signal generated by the selected drive chain (C1, C2, C3, CN) is provided to a drive (104) of the vibrating measuring device (5).