Download - Smart Dust Technology
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A tiny dust size device with extra-ordinary capabilities. Often calledmicro electro-mechanical sensors.
Combines sensing, computing, wirelesscommunication capabilities.
autonomous power supply within
volume of only few millimeters.
What is smart dust
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A single Smart Dust mote has: A semiconductor laser diode and MEMS beam
steering mirror for active optical transmission.
A MEMS corner cube retro-reflector (CCR) for
passive optical transmission.
MEMS sensor
An optical receiver.
A signal processing and control circuitry.
A power source based on thick-film batteries and
solar cells.
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Smart Dust com onents
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Comprises of three mutuallyperpendicular mirrors of gold-coated
poly-silicon.
Has the property that any incident ray oflight is reflected back to the source
provided that it is incident within acertain range of angles centered aboutthe cube's body diagonal
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The micro-fabricated CCR
includes an electrostatic actuator thatcan deflect one of the mirrors atkilohertz rates.
Thus the external light source can betransmitted back in theform of modulated signal at kilobits
per second
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PASSIVE
ACTIVEACTIVEACTIVEActive
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ACTIVE semiconductor diode,
collimating lens, beamsteering micro mirror Comparatively high power
usage Used only for short duration Inter mote communication
present Long range ~ tens of km Higher bit rates ~ few mbps Base station commands
&wake up the motes
PASSIVE Uses corner cube retro
reflector (CCR) Low power consumption Can be used for longer
duration Inter mote communication
absent Short range ~150 m Lower bit rates ~ few kbps Motes transmit periodic
information automatically byCCR to base station
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SIZE:
BATTERY:
ENERGY EFFICIENCY:
PRICING:
PHYSICAL SECURITY:
UPGRADING:
MAJOR CHALLENGES:
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It is a special class of sensor network
Fine sensing granularity
Applications :
Enemy troop monitoring Large scale Biology or Geology
Smart office spaces
Defense-related sensor networks
Inventory Control Meteorological and geophysical monitoring
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The map showing the geographical location for the motes to dropped in Iraq forsurveillance during war. Manned surveillance is almost impossible
MILITARY APPLICATION:
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Forest fire detection
Implementation :drop smart dustfrom an airplane
Motes self-organizeinto a networkUsage
A mote that detects afire notifies centralmonitoring station
The mote location istheapproximate locatio
n of the fire
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Conclusion:
There are many ongoing researches on Smart
Dust, the main purpose of these researches is to
make Smart Dust mote as small as possible andto make it available at as low price as possible.
Soon we will see Smart Dust being used in
varied application.
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