Electrostatic Transducer Electrode Fusion for Precise Multi-Point Detection
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Solution Overview
Problem
Existing electrostatic-type transducers face challenges with high parts count, design flexibility, and precision due to multiple independent electrode pairs, which can lead to variations in reference potential, and the use of volatile adhesives and organic solvents affects capacitance and environmental sustainability.
Innovation Solution
An electrostatic-type transducer is designed with an insulator sheet made of elastomer, featuring a plurality of first electrode sheets arranged on the front surface and a single second electrode sheet on the back surface, adhered via fusion without volatile adhesives or organic solvents, reducing the number of wirings and improving design flexibility and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple independent electrode pairs are used in electrostatic-type transducers, then the sensor can detect forces at multiple locations, but the parts count increases and variations in reference potential reduce detection precision
Solution Approach 1:
The patent combines multiple second electrodes into a single integrated second electrode that spans across multiple detection regions. This single electrode serves as a common reference potential for all first electrodes, eliminating reference potential variations while maintaining the ability to detect forces at multiple locations through the respective first electrodes.
Solution Approach 2:
The single second electrode performs multiple functions simultaneously: it serves as the reference potential for all detection regions and as a common electrical connection point. This universal electrode design eliminates the need for multiple independent electrode pairs while maintaining multi-location detection capability.
2Adaptability or versatility
If multiple independent electrode pairs are used, then the sensor can function at multiple locations, but the number of wirings and parts increases
Solution Approach 1:
The patent merges multiple second electrodes into one single second electrode structure. This consolidation reduces the total number of electrode components and their associated wirings while preserving the functional capability to detect forces at multiple locations through the distributed first electrodes.
3Ease of manufacture
If volatile adhesives or organic solvents are used in manufacturing, then electrode assembly is simplified, but the capacitance changes and environmental sustainability is compromised
Solution Approach 1:
The patent employs a self-adhesive mechanism where the first and second electrodes inherently adhere to each other through electrostatic attraction and/or van der Waals forces. This self-service adhesion eliminates the need for external adhesives or solvents, maintaining assembly simplicity while ensuring precise capacitance control and environmental sustainability.
4Ease of manufacture
If volatile adhesives or organic solvents are used, then electrode joining is facilitated, but harmful emissions are generated
Solution Approach 1:
The electrodes utilize self-adhesion through electrostatic and van der Waals forces, eliminating the need for volatile adhesives or organic solvents. This approach maintains ease of manufacturing while completely avoiding VOC emissions and other harmful factors associated with conventional adhesive-based joining methods.
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 solution reduces parts count, enhances detection and operation precision, and addresses environmental concerns by eliminating the need for volatile adhesives and organic solvents, while simplifying manufacturing and reducing costs.
Implementation Method 1
a plurality of first electrode sheets which is arranged on a front surface side of the insulator sheet, adhered to the insulator sheet by fusion of the insulator sheet
Implementation Method 2
in a transducer (senor or actuator) using capacitance between electrodes
Data Source
AI summary
An electrostatic-type transducer (1) includes: an insulator sheet (11) formed of an elastomer; a plurality of first electrode sheets (12, 13, 14) which is arranged on a front surface side of the insulator sheet (11), adhered to the insulator sheet (11) by fusion of the insulator sheet (11), and arranged with a distance from each other in the surface direction of the insulator sheet (11); and one second electrode sheet (15) which is disposed on the back surface side of the insulator sheet (11) and adhered to the insulator sheet (11) by fusion of the insulator sheet (11), and in which portions facing the plurality of first electrode sheets (12, 13, 14) and portions facing each region between the adjacent first electrode sheets (12, 13, 14) in the surface direction are formed integrally.