Acoustic Piston Position Measurement in MDT Sample Bottles
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Solution Overview
Problem
Current apparatuses for Modular Dynamics Tester (MDT) do not accurately determine piston position during fluid withdrawal, lacking sufficient resolution for operators to control the sampling process effectively.
Innovation Solution
A method using a transducer to measure the time of flight of acoustic energy, combined with knowledge of the speed of sound in the fluid, to calculate the piston position within the sample bottle, allowing for precise determination of the piston position and sample validation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods are used to determine piston position, then the device complexity is reduced, but the measurement precision is insufficient for effective control
Solution Approach 1:
The patent replaces mechanical or electrical position sensing systems with an acoustic measurement system. A transducer emits acoustic waves through the fluid to the piston surface, and the time of flight of the acoustic waves is used to calculate piston position. This substitution achieves high measurement precision while maintaining relatively simple device architecture.
Solution Approach 2:
The patent introduces acoustic waves as an intermediary medium to measure piston position. Instead of direct mechanical contact or electrical sensing, the system uses acoustic energy propagation through the fluid as a mediator to indirectly determine position, achieving non-contact measurement with high precision.
2Measurement precision
If acoustic measurement method is implemented, then measurement precision is improved, but device complexity increases due to transducer and signal processing requirements
Solution Approach 1:
The transducer serves multiple functions: it acts as both the acoustic wave source and the receiver for echo signals. This multi-functionality reduces the number of separate components needed, thereby limiting the increase in device complexity while maintaining high measurement precision.
Solution Approach 2:
The system uses the existing fluid in the sample bottle as the acoustic transmission medium, eliminating the need for separate coupling media or complex transmission paths. The fluid itself serves the dual purpose of sample containment and acoustic wave propagation, simplifying the overall device structure.
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 provides accurate and reliable piston position measurement, enhancing the control over fluid sampling and ensuring phase equilibrium, thereby improving the sample collection process in MDT systems.
Implementation Method 1
exciting the transducer to provide at least one wave of acoustic energy, propagating the acoustic energy through the chamber to a surface, reflecting the acoustic energy from the surface
Implementation Method 2
determining a time of flight of the acoustic energy, and calculating the piston position from the time of flight of the acoustic energy
Implementation Method 3
reflecting the acoustic energy from the surface
Data Source
AI summary
A method to determine a piston position in a sample bottle, having steps of providing a transducer near a chamber of the sample bottle, exciting the transducer to provide at least one wave of acoustic energy, propagating the acoustic energy through the chamber to a surface, reflecting the acoustic energy from the surface, receiving the acoustic energy at a receiver, determining a time of flight of the acoustic energy, and calculating the piston position from the time of flight of the acoustic energy.