Vibration Densimeter Sensor with Tuning Fork Transducer
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Solution Overview
Problem
Existing density and viscosity measurement sensors face challenges in achieving high accuracy due to complexities in sensor configuration and increased mass of the resonance system, which affects the reliability and simplicity of the measurement process.
Innovation Solution
The proposed sensor configuration for a vibration densimeter incorporates a hollow cylindrical body with a hermetically attached metal membrane, featuring a piezoelectric element on the inner side and a mechanical tuning fork vibration transducer on the outer side. The tuning fork is attached to the membrane and the cylindrical resonator, optimizing the adjustment and reducing the additional mass of the resonance system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a hollow cylindrical resonator with complex connecting parts is used, then the structural stability is improved, but the mass of the resonance system increases and measurement accuracy deteriorates
Solution Approach 1:
The patent removes unnecessary connecting parts and simplifies the structural configuration by directly integrating the piezoelectric element to the resonator body, eliminating intermediate components that added mass without contributing to structural stability
Solution Approach 2:
The patent combines multiple functions into integrated components, where the piezoelectric element serves both as the actuating and detecting element, and the resonator structure is optimized to eliminate separate connecting parts, thereby reducing total mass while maintaining stability
2Strength
If multiple connecting parts are used to attach the resonator to the membrane, then the structural integrity is improved, but the device complexity increases
Solution Approach 1:
The patent merges the resonator attachment structure with the resonator body itself, using an integrated design where the resonator is directly coupled to the membrane through its base, eliminating the need for separate connecting parts and reducing device complexity
Solution Approach 2:
The resonator base serves multiple functions simultaneously: it provides structural attachment to the membrane, maintains structural integrity, and enables vibration transmission, thereby eliminating the need for dedicated connecting components
3Device complexity
If a simplified sensor configuration is used, then the device complexity is reduced, but the measurement accuracy deteriorates
Solution Approach 1:
The patent optimizes critical parameters such as the piezoelectric element positioning, resonator geometry, and membrane coupling characteristics to achieve high measurement accuracy despite the simplified overall configuration, demonstrating that parameter optimization can compensate for reduced structural complexity
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 configuration enhances the accuracy of density measurements while simplifying the sensor design, reducing the mass and number of connecting parts, and improving the reliability and ease of operation of the sensor.
Implementation Method 1
The conversion unit contains one or more electroacoustic transducers, as a rule, piezoelectric elements
Implementation Method 2
a mechanical tuning fork vibration transducer (5), to which in the longitudinal direction is attached a hollow cylindrical resonator (8)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The technical result consists in increased accuracy of density measurements of a liquid using a simplified sensor configuration. The sensor for a vibration densimeter comprises a hollow cylindrical body on one end face of which is hermetically attached a metal membrane. To the inner side of the membrane is attached a piezoelectric element, and to the outer side of the membrane is attached a mechanical vibration transducer, which is made in the form of a tuning fork, to which a hollow cylindrical resonator is attached in the longitudinal direction. Moreover, the base of the tuning fork is attached to the membrane, and the teeth of the tuning fork are attached to an end face of the hollow cylindrical resonator.