Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Sensor patches, loud speakers and power generators made up of rubber

16.06.2015

At IRC International Rubber Conference in Nürnberg – organized by the German Kautschuk Gesellschaft –the Center Smart Materials CeSMa, part of the Fraunhofer Institute for Silicate Research ISC in Würzburg, Germany, will present latest projects involving elastomer materials.
From June 29 to July 2, 2015 everyone interested is invited to visit booth 178 in hall 12 for more information on CeSMa projects and to experience the novel sensor, actuators, and generators with several demonstrators.

CeSMa research focuses on smart materials able to perform controllable sensor or actuator functions. In particular, the elastomers which are switchable by applying magnetic or electric fields and which consist predominantly of silicone, offer great potential for a wide variety of industrial applications.


New textile-integrated pressure sensors can take 3D measurements, e.g. in special socks for diabetics. Results can be checked on a smart phone.

Photo: K. Selsam-Geißler for Fraunhofer ISC


Novel sensor maps made of dielectric elastomer sensors are very sensitive to pressure.

Photo: K. Dobberke for Fraunhofer ISC

As capacitive measuring sensors they function as a strain or pressure sensor. They are adaptable to almost any given situation and can be even integrated into textiles. Compared to conventional solutions they save energy, weight, material, and production costs.

Owing to the iron particles embedded in their soft matrix, magnetorheological elastomers (MRE) can be magnetically controlled and so are able to perform complex movements. Their simple design also makes them an alternative to conventional electric motors or magnetic switches. Applications include dampers, seals, valves as well as soft haptic elements like buttons and grippers.

Dielectric elastomer actuators (DEA), on the other hand, are composed of insulating elastomer films coated with highly flexible electrodes on both sides. When voltage is applied to the electrodes, the thickness of the elastomer film decreases through the interaction between the oppositely charged layers. This principle can be applied to noiseless, ultra-light linear actuators used as muscles in artificial prostheses or robotic grippers. DEAs can be integrated as diaphragms in extremely thin and lightweight loud speakers.

With pressure or draught the elastomeric films change their thickness area ratio and thus the capacity as indicator. These dielectric elastomer sensors (DES) can be manufactured at low cost and are suitable as large flexible sensors of very good chemical, thermal and mechanical stability, for example for pressure distribution measurement in seats or mattresses.

The elastomer sensors can also be integrated into textiles and permit a three-dimensional pressure measurement through a specially developed stocking for diabetics that warns of pressure sores.
Sensor patches with an area of 1 cm² and a thickness of 2 mm can record pressure or strain even in inaccessible places.

Beyond the strain measurements additionally integrated conductive layers are able to detect the approach of a foreign object. This offers the possibility for elastic collision protection coatings for human-machine interfaces.

Dielectric elastomer generators (DEG) enable innovative, eco-friendly energy harvesting obtained through low water flows of small rivers. The pressure – generated with a gentle pipe system (Venturi principle) – leads to a periodic elongation and relaxation of the elastomer films. With the help of an electronic circuit this mechanical stretching is directly converted into electrical energy. In contrast to conventional regenerative energy converters DEGs don’t generate optical or acoustic disturbances of the environment. The use of these generators is suited for campsites or charging stations for electric bikes and cars in rural areas.

Weitere Informationen:

http://www.cesma.de
http://www.isc.fraunhofer.de

Marie-Luise Righi | Fraunhofer-Institut für Silicatforschung ISC

More articles from Trade Fair News:

nachricht Bug-proof communication with entangled photons
22.06.2017 | Fraunhofer-Gesellschaft

nachricht LZH at the LASER World of Photonics 2017: Light for Innovation
16.06.2017 | Laser Zentrum Hannover e.V.

All articles from Trade Fair News >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Study shines light on brain cells that coordinate movement

26.06.2017 | Life Sciences

Smooth propagation of spin waves using gold

26.06.2017 | Physics and Astronomy

Switchable DNA mini-machines store information

26.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>