Fachbereich Informatik und Elektrotechnik Ubicomp. Ubiquitous Computing. Ubiquitous Computing, Helmut Dispert
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1 Ubicomp Ubiquitous Computing
2 Ubicomp Ubiquitous Computing PicoCube Concept e-cube Concept
3 Ubicomp Picocube: A 1cm3 Sensor Node Powered by Harvested Energy Yuen-Hui Chee, Mike Koplow, Michael Mark, Nathan Pletcher, Mike Seeman, Fred Burghardt, Dan Steingart, Jan Rabaey, Paul Wright, Seth Sanders: University of California at Berkeley Berkeley Wireless Research Center Gigascale Systems Research Center
4 Ubicomp PicoCube Architecture TPMS: Tire-pressure monitoring system
5 PicoCube Architecture Sensor Board Radio Board Microprocessor MEMS Piezo Bender Power Bus Microbattery
6 PicoCube Architecture radio COB die on a dime Stacked PCBs 1cm 2 radio board top/bottom switch/power board top/bottom sensor board #2 top/bottom sensor board #1 top/bottom uc board top/bottom storage board top/blank bottom
7 PicoCube Architecture
8 Ubicomp Custom PicoCube Transmitter with FBAR 10 kbps, 10 m range at 0 dbm Supports FSK modulation, but useful for OOK Custom 200 antenna, matching PA Power Management IC 2 switched-capacitor converters (0.7V, 2.1V) 84% efficient Synchronous Rectifier 88% efficient from shaker Ultra-low-power references and other circuitry
9 PicoCube Architecture Stacked PCB, 1cm on a side Global power board µc board sensor board radio board Interconnected via tiny elastomeric connectors 0.065mm wide conductor, typical 0.125mm conductor pitch, typical Multiple contacts per PCB pad Pad geometry: 0.5 x 1.0mm, typical µc Board Sensor Board
10 PicoCube Architecture PCBs separated by non-conductive stand-off ring Provides inner support and precise compression for elastomers Entire assembly inserted into square ring Provides outer support for elastomers and compression mechanism
11 PicoCube Architecture Energy scavenger (TPMS) Moving magnet shaker Output directly proportional to frequency Maybe 15uw RMS in an automobile tire at 20mph About 1500 ohms output impedance Planned: MEMs piezo bender TPMS: Tire Pressure Monitoring System (in vehicles)
12 Energy Harvesting Microsized (micromachined) vibration harvester Vibrational energy scavengers use electromagnetic, electrostatic, or piezoelectric conversion to generate electrical power. A microsized piezoelectric transducer consists of a cantilever with one or several piezoelectric layers sandwiched between metallic electrodes forming a capacitor. At the tip of the cantilever, a seismic mass captures the vibrations of the machine to which the scavenger is attached.
13 Ubicomp Ubiquitous Computing The e-cube Concept
14 Ubicomp The e-cube Project
15 e-cubes Partners
16 e-cubes e-cubes aims to implement wireless sensor networks for complex distributed systems using 3D integrated modules Ref.: Werner Weber, Infineon Technologies
17 e-cubes 3D Integration Technologies Ref.: Werner Weber, Infineon Technologies
18 e-cubes Health and Fitness Demonstrator Roadmap 2008 Ref.: Werner Weber, Infineon Technologies
19 e-cubes M18 Demonstrator Upper board: sensorics and power management Middle board: micro processor, memory and power management Lower board: RF transceiver and antenna Ref.: Werner Weber, Infineon Technologies
20 e-cubes Basic Structure of an e-cubes System: 3D Stacking of Functional Subsystems and Roadmap for Reduction in Size Peter Ramm and Anton Sauer, Fraunhofer Institute for Reliability and Microintegration, Munich Division 3D Integration Technologies for Ultrasmall Wireless Sensor Systems the e-cubes Project
21 e-cubes Distinction between application layer- and sub-module-integration
22 e-cubes M33 demonstrator with risk assessment Ref.: Werner Weber, Infineon Technologies
23 Beyond e-cubes European Projects on Sensor Networks Ref.: Werner Weber, Infineon Technologies
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