Solution to the contact problem of multi-layer capacitive dielectric elastomer sensor: laser-engraved elastomer buffer layer

Research output: Contribution to book/Conference proceedings/Anthology/ReportConference contributionContributedpeer-review

Contributors

Abstract

Dielectric elastomers (DEs) are widely used in soft robotics, wearable electronics and advanced sensor technologies due to their ability to withstand large deformations, making them ideal for applications requiring flexible and stretchable components. A key challenge in the field of dielectric elastomer sensors (DESs) is ensuring reliable electrical contact between the electrodes and the external measuring device. Traditionally, contact is established using carbon grease, conductive ink, or copper films, which may suffer from instability under mechanical loading such as compression and stretching. These loads can lead to contact degradation, affecting sensor performance and longevity. A more reliable approach involves the use of wires and conductive threads or fabric, which have been shown to provide enhanced stability under mechanical strain. In this study, we present a novel contact solution utilizing a laser-engraved elastomer buffer layer. This buffer layer, combined with conductive threads and carbon grease, provides enhanced contact fixation, improving durability and adaptability. The laser engraving technique allows for customizable contact designs, enabling optimization based on specific application requirements. This approach offers a promising method for enhancing the reliability of DESs, making them more suitable for dynamic and high-deformation environments.

Details

Original languageEnglish
Title of host publicationActive and Passive Smart Structures and Integrated Systems XIX
EditorsXiaopeng Li, Yangyang Chen, Guoliang Huang, Mostafa A. Nouh, Christopher Sugino, Serife Tol, Jinkyu Yang
PublisherSPIE - The international society for optics and photonics
ISBN (electronic)9781510686502
Publication statusPublished - 2025
Peer-reviewedYes

Publication series

SeriesProceedings of SPIE - The International Society for Optical Engineering
Volume13432
ISSN0277-786X

Conference

TitleActive and Passive Smart Structures and Integrated Systems XIX
Conference number19
Descriptionheld at SPIE Smart Structures + Nondestructive Evaluation 2025
Duration17 - 21 March 2025
LocationSheraton Vancouver Wall Centre
CityVancouver
CountryCanada

External IDs

ORCID /0000-0002-6437-4496/work/213144091
ORCID /0000-0002-8588-9755/work/213147643
ORCID /0000-0002-5317-1431/work/213148058

Keywords

Keywords

  • carbon black based electrodes, Dielectric elastomers, elastomer buffer layer, laser engraving, laser-engraved elastomer, multi-layer capacitive sensor, stacked dielectric elastomer sensor, stacking, strain sensor