Piezoceramic Viscous Damper Viscosity Monitoring by Pressure Waves
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Solution Overview
Problem
Traditional piezoceramic transducers are not capable of quantitatively monitoring changes in fluid viscosity within viscous dampers, which is crucial for maintaining effective vibration suppression in civil engineering applications due to temperature and pressure-induced viscosity changes.
Innovation Solution
A viscous damper fluid viscosity monitoring device utilizing paired piezoceramic transducers, where one transducer transmits signals and the other receives, with corks and a baffle for protection, allowing real-time monitoring of fluid viscosity through the analysis of signal amplitude changes caused by varying energy dissipation of pressure waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional piezoceramic transducers are used for detection, then measurement capability is provided, but quantitative monitoring of fluid viscosity changes cannot be achieved
Solution Approach 1:
The patent implements a feedback mechanism where the received signal amplitude from the piezoceramic transducers is continuously monitored and used to calculate fluid viscosity changes. This feedback loop enables quantitative monitoring of viscosity variations, directly addressing the inability of traditional transducers to provide measurable viscosity data while ensuring vibration suppression performance can be maintained through active monitoring.
Solution Approach 2:
The patent replaces traditional mechanical viscosity measurement methods with an acoustic field-based measurement system. By using piezoceramic transducers to generate and detect pressure waves in the fluid, the system substitutes mechanical measurement approaches with acoustic wave propagation analysis, enabling non-contact, quantitative viscosity monitoring that preserves damper functionality.
2Measurement precision
If regular viscosity detection is performed by removing the viscous damper, then viscosity measurement can be achieved, but time and effort are wasted
Solution Approach 1:
The patent enables the viscous damper to perform self-diagnosis by integrating piezoceramic transducers directly into the damper structure. The transducers continuously monitor fluid viscosity through acoustic wave analysis, allowing the system to self-assess its operational state without requiring external intervention, removal, or reinstallation of components, thereby eliminating time loss while maintaining measurement precision.
3Extent of automation
If piezoceramic transducers are installed inside the viscous damper, then real-time monitoring capability is provided, but the transducers may be damaged during use
Solution Approach 1:
The patent introduces a protective housing or mounting structure as an intermediary between the piezoceramic transducers and the viscous fluid environment. This intermediary protection layer shields the transducers from direct exposure to high-pressure fluid conditions and potential mechanical damage, while still allowing acoustic wave transmission for real-time viscosity monitoring functionality to operate effectively.
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
Enables real-time, non-invasive, and cost-effective monitoring of fluid viscosity, reducing the need for regular damper removal and ensuring continuous vibration suppression performance.
Implementation Method 1
piezoceramic transducers can be used as both transducers and actuators because of the unique direct piezoelectric effect and converse piezoelectric effect thereof
Implementation Method 2
piezoceramic transducers can be used as both transducers and actuators because of the unique direct piezoelectric effect and converse piezoelectric effect thereof
Implementation Method 3
when the fluid viscosity of a viscous damper changes, the energy dissipation of pressure waves during propagation in a fluid will change
Data Source
AI summary
The present invention belongs to the technical fields of civil engineering, smart material and health monitoring, and provides a viscous damper fluid viscosity monitoring device and method based on piezoceramic transducers, comprising piezoceramic transducers, wires, corks, a baffle and a viscous damper. When the fluid viscosity of the viscous damper changes, the energy dissipation of pressure waves during propagation in a fluid will change, and signals received by the piezoceramic transducers will change, so that the viscosity of the fluid in the viscous damper can be calculated by the amplitude change of the signals received. The device of the present invention has a simple structure and accurate monitoring results, and provides a simple and feasible method for real-time monitoring of fluid viscosity of viscous dampers in engineering.