Fluid Density Meter Auto-Start via Prime Resonance Frequency Scanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid density measurement methods face ambiguity in determining fluid density due to multiple resonance frequencies supported by test fixtures, leading to errors in density calculation.
Innovation Solution
A fluid density meter that generates a prime resonance frequency vibration and maintains it through a feedback loop, ensuring accurate density measurement by selectively exciting and sustaining the prime resonance frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple resonance frequencies are used for measurement, then measurement speed is improved, but measurement precision deteriorates due to ambiguity in frequency-density association
Solution Approach 1:
The patent applies preliminary action by pre-establishing a unique correspondence relationship between prime resonance frequency and fluid density before measurement. The system identifies and locks onto the prime resonance frequency (lowest frequency mode) through frequency scanning, then maintains this specific mode for measurement. This preliminary selection of the prime resonance mode eliminates ambiguity in the frequency-density association, ensuring that subsequent measurements use a known, unambiguous reference point while still allowing rapid switching between multiple frequency modes for speed.
Solution Approach 2:
The patent segments the resonance frequency spectrum into distinct modes, specifically isolating the prime resonance frequency (first mode) from higher-order modes. By focusing measurement on the segmented prime resonance component rather than using all resonance frequencies simultaneously, the system maintains measurement speed through selective mode excitation while eliminating the ambiguity that arises when multiple unsegmented frequency modes are used together.
2Measurement precision
If frequency scanning is performed to identify prime resonance, then measurement accuracy is improved, but measurement time increases
Solution Approach 1:
The patent applies self-service by implementing an automatic frequency scanning and identification system that autonomously determines the prime resonance frequency without requiring manual intervention. The system automatically scans through the frequency spectrum, identifies the prime resonance mode through peak detection algorithms, and locks onto this frequency for measurement. This self-identifying capability eliminates the need for time-consuming manual frequency calibration while ensuring accurate prime resonance identification, thereby reducing overall measurement time.
Solution Approach 2:
The patent uses periodic action in the form of systematic frequency scanning cycles. Instead of continuous scanning, the system performs periodic frequency sweeps at predetermined intervals, efficiently locating the prime resonance frequency through structured periodic excitation and detection cycles. This periodic approach reduces the time penalty compared to continuous scanning while maintaining accurate frequency identification.
3Stability of the object's composition
If feedback loop is closed to maintain resonance, then measurement stability is improved, but device complexity increases
Solution Approach 1:
The patent directly applies feedback by implementing a closed-loop control system that continuously monitors the resonance frequency and adjusts the excitation signal to maintain stable prime resonance conditions. The feedback mechanism detects deviations from the target resonance frequency and automatically corrects them, ensuring measurement stability. While feedback does increase circuit complexity, the patent manages this through efficient feedback algorithms and integrated circuit design that minimize the complexity overhead while maximizing stability benefits.
Solution Approach 2:
The patent uses an intermediary approach by introducing a dedicated frequency control circuit that acts as a mediator between the signal source and the test fixture. This intermediary circuit handles the complex feedback and frequency adjustment functions, isolating the complexity from the main measurement system. The intermediary controller manages the feedback loop operations, maintaining resonance stability while keeping the overall device architecture manageable through functional decomposition.
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 eliminates ambiguity in resonance frequency association with fluid density, providing accurate fluid density determination by maintaining the prime resonance frequency during measurement.
Implementation Method 1
generating a resonance frequency and a prime resonance vibration of the test fixture based on the modified plurality of vibrations
Implementation Method 2
a pickup circuit that converts the resonance frequency to an output voltage based on the resonance frequency
Implementation Method 3
maintaining the prime resonance vibration frequency by closing the feedback loop
Implementation Method 4
maintaining the prime resonance vibration by applying a feedback voltage, based on the detected prime resonance frequency, to the test fixture
Data Source
AI summary
A method of initiating a fluid density measurement includes generating a prime resonance of a test fixture by a startup circuit. The method of initiating a fluid density measurement includes closing a feedback loop in response to generating the prime resonance. The method of initiating a fluid density measurement includes maintaining the prime resonance by closing the feedback loop.