Meter Assembly Damping Determination via Vibrational Response Analysis
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Solution Overview
Problem
Existing Coriolis mass flow meters face accuracy issues due to changes in the damping attribute of the meter assembly, which can be caused by erosion or corrosion, leading to incorrect flow measurements.
Innovation Solution
A meter electronics system that receives vibrational responses from the meter assembly, measures response voltages during decay and rising sections, and determines an aggregate damping-related value to accurately quantify the damping characteristic, thereby maintaining measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damping attribute of the meter assembly changes due to erosion or corrosion, then the Flow Calibration Factor becomes inaccurate, but the measurement system continues to operate without detection
Solution Approach 1:
The system performs preliminary measurement of the damping characteristic of the meter assembly to detect changes before they significantly impact measurement accuracy. By measuring the damping characteristic in advance and comparing it to reference values, the system can identify erosion or corrosion issues early and adjust or replace components before they cause unacceptable measurement errors.
2Measurement precision
If traditional single-point damping measurement is used, then the measurement process is simple, but noise significantly affects the accuracy of the damping determination
Solution Approach 1:
The measurement signal is divided into multiple discrete sections along the vibrational response waveform. Instead of measuring damping from a single point or the entire waveform, the system identifies and measures from multiple specific sections, selecting those with optimal signal-to-noise ratios. This segmentation approach reduces the impact of noise while maintaining measurement simplicity.
3Measurement precision
If multiple response voltage sections are measured and averaged, then the damping determination accuracy improves, but the processing complexity increases
Solution Approach 1:
The system measures response voltages from multiple sections of the vibrational waveform, but does not process all sections equally. Instead, it identifies and selects only the sections that provide the most reliable damping information based on signal quality criteria. This partial action approach achieves high measurement precision by focusing computational resources on the most informative sections rather than uniformly processing all available data.
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
The system effectively determines the damping characteristic of the meter assembly, reducing the impact of noise and ensuring high accuracy in flow measurements by averaging damping values from multiple sections, thus stabilizing the Flow Calibration Factor.
Implementation Method 1
the vibrational response comprising a response to an excitation of the meter assembly at a substantially resonant frequency
Implementation Method 2
determine an aggregate damping-related value of the meter assembly based on at least one of the one or more decay sections and the one or more rising sections
Data Source
AI summary
A meter electronics (20) for determining a damping of a meter assembly (10) of a flow meter (5) is provided. The meter electronics (20) includes an interface (201) for receiving a vibrational response from a meter assembly (10), the vibrational response comprising a response to an excitation of the meter assembly (10) at a substantially resonant frequency, and a processing system (203) in communication with the interface (201). The processing system (203) is configured to receive the vibrational response from the interface (201) and measure a plurality of response voltages (V) of the vibrational response, the plurality of response voltages (V) including at least one of one or more decay sections (430a, 530a-530f) and one or more rising sections (430b, 630a-630f). The processing system (203) is also configured to determine an aggregate damping-related value of the meter assembly (10) based on at least one of the one or more decay sections (430a, 530a-530f) and the one or more rising sections (430b, 630a-630f).