Regular session - Embedded technologies

sOc-EUSAI'2005 conference

Regular session - Embedded technologies

P2-1 High Damping Electrostatic System For Vibration Energy Scavenging
Despesse, Ghislain - Chaillout, Jean-Jacques - Jager, Thomas - Leger, Jean-Michel - Vassilev, Apostol - Basrour, Skandar - Charlot, Benoit
As formated for the printed proceedings - 38.ps - 38.pdf - pages 283-286
As delivered by the authors - 38_pdf_file.pdf
Abstract :
Advances in low power electronics and microsystems design open up the possibility to power small wireless sensor nodes thanks to energy scavenging techniques. Among the potential energy sources, we have focused on mechanical surrounding vibrations. To convert vibrations into electrical power we have chosen mechanical structures based on electrostatic transduction. Thanks to measurements and in agreement with recent studies, we have observed that most of surrounding mechanical vibrations occurs at frequencies below 100 Hz. We report here global simulations and designs of mechanical structures able to recover power over a large spectrum below 100 Hz. Contrary to existing structures tuned on a particular frequency, we have investigated conversion structures with a high electrical damping. Mathematica analytical models have been performed to determine the mechanical and electrical parameters that maximize the scavenged power for a wide number of applications. Two prototypes of mechanical structures have been designed.

P2-2 Wireless sensor network node with asynchronous architecture and vibration harvesting micro power generator
Ammar, Yasser - Buhrig, Aurelien - Marzencki, Marcin - Charlot, Benoit - Basrour, Skandar - Matou, Karine - Renaudin, Marc
As formated for the printed proceedings - 58.ps - 58.pdf - pages 287-292
As delivered by the authors - 58_pdf_file.pdf
Abstract :
This paper presents recent advances in the development of a microsystem designed to be part of a wireless sensor network. This microsystem is developed with two particular technologies: asynchronous circuits and ambient energy harvesting power generator. Asynchronous technologies offer several advantages allowing a global decrease in the power consumption of the node. In addition, the presence of an ambient energy scavenger allows the system to power itself, thus reducing maintenance and increasing the lifetime of the node.

P2-3 Millimeter wave up-converted UWB based positioning system
Bocquet, Michael - Loyez, Christophe - Benlarbi-Delai, Aziz
As formated for the printed proceedings - 68.ps - 68.pdf - pages 293-296
As delivered by the authors - 68_pdf_file.pdf
Abstract :
Ad hoc network connectivity and efficient energy communication require the use of optimized routing algorithms. Input data of such algorithms are the spatial coordinates of each mobile station (MS). These coordinates could be given by GPS based system or by alternative ways involving modern technology able to ensure both communication and location.
An original solution, based on a like Ultra Wide Band (UWB) technology, uses millimeter multitone dual transmission acting like a pulse composite signal and a basic millimeter receiver involving Enhanced Time Difference Of Arrival (E-TDOA) measurements.

P2-4 PEACPocket : a technological demonstrator for future multimedia smart card
Bacquet, Sylvain - Rouault, Helene - Lhermet, Helene - Crochon, Elisabeth - Lignier, Helene - Martinet, Sebastien - Martin, Michel - Sourgen, Laurent
As formated for the printed proceedings - 35.ps - 35.pdf - pages 297-302
As delivered by the authors - 35_pdf_file.pdf
Abstract :
This presented work has been conducted in a framework of a project with the objective to associate power microsources into smart cards in order to create novel functionalities. To demonstrate the feasibility of such a new powered microsystem, a demonstrator named PEA Card is under development.
It is powered by two rechargeable batteries :
- a microbattery on chip for security applications.
- a Thin Film Power Battery inside the card packaging to recharge the microbattery and to supply user interfaces.
An ASIC, used as substrate for the microbattery, manages the energy of the two power sources. It is designed to have a very low consumption. A processor and a display, powered by the embedded Power Battery, allow the user to access data without external source of energy. An RFID antenna permits a contactless charge of the two batteries.

P2-5 3DSim : Rapid Prototyping Ambient Intelligence
Nazari, Ali A. Shirehjini - Klar, Felix
As formated for the printed proceedings - 77.ps - 77.pdf - pages 303-308
As delivered by the authors - 77_pdf_file.pdf
Abstract :
The present paper introduces 3DSim, a tool for rapid prototyping "Ambient Intelligence" applications. A major feature of this work is the use of a 3D-based virtual environment to represent an intelligent meeting space allowing for prototyping a number of components such as lights, blinds, SMART Boards, large display walls, projectors, "aware chairs" and humans as well as human activity animation. As a result of using standardized interfaces, any UPnP control point may be used to invoke actions on "virtual" UPnP devices. Such devices are dynamically inserted to the environment and can be removed at run-time. Data delivered by sensors is interpreted by an environment monitoring component which routes higher-level atomic context information to virtual objects. As a result of invoked device actions and gathered context information, resulting state changes (e.g., switching light states) are visualized within the scene.