H2020Индивидуална стипендия2020–2022

DEtune · Towards a new generation of soft and conformable acoustic devices based on electroactive polymers

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2020-11-01 → 2022-10-31
Финансиране от ЕС: 162 806 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Диелектричните еластомери се изследват за създаване на леки и гъвкави говорители, които могат да се интегрират в дрехи. Това позволява устройствата за звук да станат по-леки и да приемат формата на повърхностите, върху които са поставени.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Towards a new generation of soft and conformable acoustic devices based on electroactive polymers

The role of smart devices and consumer electronics is becoming every day more central in our lives and working environments. In the future, these devices will become increasingly integrated, they will be embedded onto our clothes or onto the surface of the objects we interact with, and will perform tasks that currently require external portable devices, or completely new tasks such as monitoring our physiological parameters and warning us about dangers. The pursuit of this vision creates a need to rethink the shape of conventional devices (such as monitors, loudspeakers) in an attempt to make them lighter, more flexible, and more efficient. Motivated by this vision, the DEtune project focused on the development and systematic investigation of an unconventional class of lightweight loudspeakers based on smart materials called dielectric elastomers (DE). Compared to traditional speakers, that rely on a rigid moving coil and a moving diaphragm, DE speakers merge these two elements into a single lightweight soft polymeric membrane, which is able to produce sound thanks to electrostatically-driven vibrations. Thanks to this feature, DEs might be used to develop new concepts of soft conformable loudspeakers, suitable for integration onto garments or complex structures. The objective of the DEtune project were thus: - To generate base knowledge on DE loudspeakers and propose new experimental and modelling tools to characterize/design new devices. - To elaborate advanced sensing and control strategies for DE loudspeakers. - To develop application demonstrators of DE loudspeakers. The DEtune project successfully achieved the abovementioned objectives and contributed in creating base knowledge on the operating principles of DE loudspeakers, as well as in producing technological demonstrators. The foundations laid during the project might open up new research directions in the near future, especially in the direction of user interfaces (audio-tactile feedback interfaces) and multi-function smart devices.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The project operates in the key European research area of enabling technologies based on Advanced Materials. It deals with a class of smart electroactive polymers, called dielectric elastomers (DEs), which can be promisingly employed to develop soft low-cost electrostatic machines able to respond to electrical stimuli with high deformations and large actuation bandwidth. In the field of acoustics, DEs might enable the development of new loudspeakers in which the vibrating diaphragm and the actuator are combined into a soft membrane that can be adapted to arbitrary shapes or integrated into wearable textile structures. This project will develop radically new DE acoustic diaphragms exploiting the paradigms of distributed surface actuation (DSA) and self-sensing. DSA will allow a regulation of diaphragms vibrations via localised excitation of the active surface, allowing a fine control of the acoustic response. Self-sensing will allow DE devices to work both as sound generation sources and sound pressure sensors, opening new perspectives in the field of active noise control and acoustic characterisation of environments. Theoretical background on continuum vibrations in DE membranes will be first developed through modelling and experimental investigation with high-end laser vibrometry equipment. Multi-physics models of the acoustic-structure interaction of the DE diaphragms will be set-up. Diaphragms with DSA will be deployed through the segmentation of the active DE surface into arrays of independently-controlled portions via screen printing techniques. Algorithms for self-sensing of the vibrations generated by electrical or acoustic signals will be developed, which rely on simple electrical measurements of the active areas electrical variables. Finally, a prototype of a DE acoustic transducer, capable to work both as a speaker and a microphone, will be built, and its performance will be optimised leveraging on the investigated features of DSA and self-sensing.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITAT DES SAARLANDES · SaarbruckenКоординаторГермания