Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 1 -

DAAD

Energy Harvesting and Wireless Sensor Nodes

Velibor Škobić

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 2 -

DAAD

Graduate work

Industrial wireless networks•Industrial networks

wirelesswired

•Wireless network - ZigBee•Energy consumption monitoring

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 3 -

DAAD

Small Systems Simulation Symposium 2012

Solar Energy Harvesting for Wireless Sensor Nodes, Velibor Škobić, Branko Dokić, Željko Ivanović

•Solar energy harvesting small size solar panelambient environment conditiontemperature measurement

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 4 -

DAAD

Solar Energy Harvesting for Wireless Sensor Nodes

Wireless sensors network•multiple sensors on a large area•communication between nodes (communication protocol)•management and collection of values (temperature, pressure, etc..)

Wireless sensor nodes•low-power•small size•low cost•mobile and battery powered

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 5 -

DAAD

Solar Energy Harvesting for Wireless Sensor Nodes

Problem of nodes power supply•energy harvesting

Alternative sources of energy•solar energy, •temperature differences,•vibrations, etc.

315 /mW cm 3330 /W cm 3116 /W cm10 oC 340 /W cm 3960 /nW cm

Sollar cells (outdoors at noon) 15mW / cm3

Piezoelectric (shoe inserts) 330μW / cm3

Vibration (small microwave oven) 116μW / cm3

Thermoelectric ( gradient) 40μW / cm3

Acoustic noise (100dB) 960nW / cm3

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 7 -

DAAD

Solar Energy Harvesting for Wireless Sensor Nodes

•battery - only for starting node•solar panel – for harvesting energy•boost convertor – charging capacitor•super capacitor – storage of energy

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 8 -

DAAD

Solar Energy Harvesting for Wireless Sensor Nodes

Solar energy harvesting •small panel – indoor condition (from the calculator "GENIE“, 20μW)

ZigBee node•ATMEL ATZB-24-A2•supply current

active mode (19 mA)idle mode (6 μA)

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 9 -

DAAD

Solar Energy Harvesting for Wireless Sensor Nodes

Nodes state•active period TA (execution of operation)•Inactive TN (energy harvesting)

Results•active period 10 ms•minimum 95 s of inactive state for collecting energy•enough time that during the active period, node measuredtemperature and send information over the network

Projekt „ESSNBS“

Niš, November 4th – 7th, 2012 - 10 -

DAAD

Thank you for your attention !!!