Resonance Measuring System Frequency Tracking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Resonance measuring systems, such as Coriolis mass flowmeters, face significant measurement errors and loss of operating points during multiphase flows due to asymmetrical filling and secondary flows, leading to rapid fluctuations in resonance frequency and damping, which existing control methods are unable to manage effectively.
Innovation Solution
The method involves generating orthogonal projection components of the response signal to determine natural frequencies, using both alternating and direct components to rapidly adjust and maintain the resonance operating point, allowing for simultaneous determination and tracking of natural frequencies with improved accuracy and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional control methods are used to manage resonance frequency fluctuations, then the system can maintain basic operation, but measurement errors occur and operating points are lost during multiphase flows
Solution Approach 1:
The patent implements dynamic adaptation by continuously adjusting the excitation frequency to track the shifting natural frequency of the oscillating element. The control system monitors resonance conditions in real-time and modifies operating parameters dynamically to maintain optimal measurement conditions despite changing flow conditions, thereby preventing operating point loss and maintaining measurement accuracy during multiphase flows
Solution Approach 2:
The patent employs feedback mechanisms where the oscillation pickup continuously monitors the actual oscillation characteristics and feeds this information back to the control system. This feedback loop enables the system to detect deviations from optimal operating points and automatically correct them by adjusting excitation parameters, thus maintaining measurement precision and preventing operating point loss during multiphase flow conditions
2Use of energy by moving object
If the resonance measuring system operates at natural frequencies to minimize energy expenditure, then energy efficiency is improved, but rapid fluctuations in natural frequency during multiphase flows cause loss of operating points
Solution Approach 1:
The system dynamically tracks the natural frequency of the oscillating element and adjusts the excitation frequency accordingly to maintain resonance conditions. This dynamic operation ensures the system continues to operate at optimal energy efficiency points even when natural frequency shifts occur during multiphase flows, preventing operating point loss while maintaining energy efficiency
Solution Approach 2:
The feedback mechanism continuously monitors oscillation characteristics and adjusts excitation parameters to maintain resonance. This ensures the system operates at the most energy-efficient point possible under varying conditions, as the feedback loop automatically compensates for natural frequency shifts to maintain optimal operating points
3Productivity
If existing control methods are used, then the system structure remains simple, but the system cannot rapidly adjust to changing natural frequencies in multiphase flows
Solution Approach 1:
The patent implements rapid dynamic adjustment capabilities through sophisticated control algorithms that continuously adapt the excitation frequency to track natural frequency changes. The system uses real-time signal processing and adaptive control to quickly respond to changing flow conditions, enabling rapid adjustment to new operating points while managing system complexity through intelligent control strategies
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 approach enables safer, faster, and more accurate determination of natural frequencies, allowing for quick readjustment of the resonance measuring system to maintain optimal operating points even in multiphase flows, reducing measurement errors and maintaining energy efficiency.
Implementation Method 1
The oscillating element is excited by the oscillation generator with known excitation signals F i (t) to oscillate in at least one eigenmode
Implementation Method 2
rapid fluctuations in the resonance frequency, as well as the occurrence and cessation of secondary flows in the measuring tube, which cause rapid damping when they occur
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for operating a resonance measuring system (1), in particular a Coriolis mass flow meter, is described and illustrated. The object of the present invention is to provide such a method that enables rapid and accurate adjustment and fine-tuning of the resonance measuring system to the resonance operating point or to the multiple resonance operating points.The problem is solved by projecting the response signal yi(t) onto an orthogonal reference system, generating orthogonal projection components of the response signal, determining at least a first value corresponding to the natural frequency f0i of the resonance measuring system (1) with at least a part of the AC components of the projection components, determining at least a second value corresponding to the natural frequency f0i of the resonance measuring system (1) with at least a part of the DC components of the projection components, and using the first and the second value corresponding to the natural frequency f0i of the resonance measuring system (1) to excite the resonance measuring system (1) with at least one control in at least one control loop to the mode shape corresponding to the natural frequency f0i.