Electroosmotic Acoustic Transducer Array
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sound transducers are bulky, expensive, prone to degradation, and limited in flexibility and broadband capabilities, making them unsuitable for various industry applications, especially in underwater environments.
Innovation Solution
An electroosmotic acoustic transducer system comprising a transducer array of channels with electrodes and a voltage source, generating an electric field to produce electroosmotic flow and acoustic waves without moving parts, allowing for flexible and broadband sound projection and sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional sound transducers use vibrating solid boundaries, then sound projection is achieved, but the device becomes bulky, expensive, and requires moving parts
Solution Approach 1:
The patent replaces the conventional mechanical vibrating solid boundary system with an electroosmotic system that uses electric fields to generate acoustic waves through fluid flow in microchannels. This substitution eliminates moving parts while maintaining sound projection capability, directly resolving the contradiction between power output and device complexity.
Solution Approach 2:
The invention changes the fundamental operating parameters from mechanical vibration to electroosmotic fluid flow. By applying voltage across microchannels containing electrolyte solution, the system generates acoustic waves through electroosmotic pumping rather than mechanical vibration, thereby eliminating moving parts while preserving sound projection function.
2Power
If conventional transducers operate at high power, then sound projection is enhanced, but degradation from cavitation effects accelerates
Solution Approach 1:
By replacing the mechanical vibration system with an electroosmotic fluid flow system, the patent eliminates the cavitation problem inherent in high-power mechanical transducers. The electroosmotic mechanism generates acoustic waves through controlled fluid flow rather than violent mechanical vibration, thereby enhancing reliability while maintaining power output.
3Power
If conventional transducers are designed for specific applications, then performance is optimized, but flexibility and adaptability are limited
Solution Approach 1:
The patent creates a universal transducer platform based on electroosmotic microchannels that can be adapted to various applications by changing the microchannel geometry, dimensions, and configuration. The same fundamental mechanism can serve different purposes (acoustic projection, sensing, imaging) by adjusting structural parameters, thereby achieving both optimized performance and flexibility.
Solution Approach 2:
The invention enables dynamic adaptability by allowing real-time adjustment of acoustic characteristics through voltage control and microchannel design variations. The system can dynamically switch between different operating modes and frequency ranges by modifying the electroosmotic flow parameters, providing versatility across multiple applications.
4Volume of moving object
If conventional transducers are made compact, then portability is improved, but broadband projection and sensing capabilities are limited
Solution Approach 1:
The patent employs an array of multiple microchannels instead of a single large transducer element. This segmentation allows each microchannel to operate independently at different frequencies, enabling broadband capability while keeping individual channel dimensions small. The collective array achieves compact size with enhanced versatility.
Solution Approach 2:
The invention transitions from traditional planar transducer design to three-dimensional microchannel structures. By utilizing vertical and lateral dimensions within microchannels, the system achieves broadband frequency response and sensing capabilities within a compact footprint, overcoming the limitation of conventional two-dimensional transducer designs.
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
The system achieves efficient sound projection and sensing across a wide frequency range, is robust and reliable, and can operate in high-pressure environments, offering improved performance and versatility compared to traditional transducers.
Implementation Method 1
A voltage source connected to the first and second electrodes is configured to apply a voltage across a length of the array of the plurality of channels to generate an electric field parallel to each channel. The electric field causes an electroosmotic flow of ions from the reservoir to the outlet producing a plurality of acoustic waves or sound at the outlet.
Data Source
AI summary
An acoustic transducer system for projecting and sensing acoustic waves or sound in fluid is disclosed in accordance with the present disclosure and figures herein. The system includes a transducer array of a plurality of channels, each channel having an inlet and an outlet, and a reservoir containing a liquid solution. A first electrode is disposed proximate to the inlet and a second electrode is disposed proximate to the outlet. A voltage source, connected to the first and second electrodes, is configured to apply voltage across a length of the array of the channels to generate an electric field parallel to each channel. The electric field causes an electroosmotic flow of ions from the reservoir to the outlet, producing a plurality of acoustic waves or sound at the outlet. A method for projecting and sensing acoustic waves or sound in fluid using the acoustic transducer system is also disclosed herein.