Vibratory Meter Zero Verification Using Fluid-Adaptive Criteria
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Solution Overview
Problem
Existing vibratory meters lack a suitable zero-verification criteria that can accommodate varying degrees of accuracy required by different processes, leading to potential inaccuracies in flow rate measurements due to unsuitable reference zero-flow values.
Innovation Solution
A meter electronics system is introduced that determines a zero-verification criteria based on fluid properties, using a processing system to measure density and phase, and applies factors like tolerance ratios to establish reliable zero-stability and bias indicators for accurate zero-calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed zero-verification criteria is used for all processes, then the device complexity is reduced, but the measurement precision deteriorates due to inability to accommodate varying accuracy requirements of different processes
Solution Approach 1:
The patent implements dynamic zero-verification criteria that automatically adjust based on detected fluid properties. The system transitions from static fixed thresholds to dynamic adaptive thresholds that change according to the specific process conditions, fluid type, and required measurement accuracy, thereby resolving the contradiction between device simplicity and measurement precision
Solution Approach 2:
The patent changes the parameters used for zero-verification from fixed universal values to variable values that depend on fluid properties (density, phase, viscosity) and process requirements. By making the verification criteria parameters adaptive rather than constant, the system achieves both operational simplicity and high measurement precision across different processes
2Measurement precision
If process-specific zero-verification criteria are implemented, then the measurement precision is improved, but the device complexity increases due to need for multiple criteria and property detection
Solution Approach 1:
The patent enables the vibratory meter to automatically determine appropriate zero-verification criteria by detecting fluid properties and selecting/adjusting criteria accordingly. The system serves itself by autonomously configuring the verification parameters without external intervention, eliminating the need for complex manual configuration while achieving process-specific precision
Solution Approach 2:
The patent creates a universal zero-verification system that can handle multiple different processes and fluid types through a single adaptive mechanism. Rather than requiring separate verification systems for each process, the unified system automatically adapts its criteria based on detected conditions, reducing overall device complexity while maintaining precision across applications
3Reliability
If zero calibration is performed frequently, then the reliability of reference zero-flow value is improved, but the productivity decreases due to operational interruptions
Solution Approach 1:
The patent performs zero verification continuously or at predetermined intervals during normal operation, rather than requiring frequent scheduled stoppages for full zero calibration. By conducting preliminary verification checks during operation and only performing full calibration when actually needed, the system maintains high reliability while minimizing interruptions to productivity
Solution Approach 2:
The patent implements a feedback mechanism where zero-verification results are continuously monitored and used to determine whether full zero calibration is required. The system provides feedback on the current state of zero accuracy and automatically initiates calibration only when verification fails, optimizing the balance between reliability and operational continuity
Data Source
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AI summary
A meter electronics (20) for determining a zero-verification criteria for a zero-verification of a vibratory meter (5) is provided. The meter electronics (20) comprises an interface (401) communicatively coupled to a sensor assembly (10) containing a fluid and a processing system (402) communicatively coupled to the interface (401). The processing system (402) is configured to determine a property of the fluid and determine, based on the property of the fluid, a zero-verification criteria value for the sensor assembly (10).