29-09-2012, 11:48 AM
SMART DUST
SMART DUSTgf.pdf (Size: 1.2 MB / Downloads: 50)
WHAT IS THE DUST
A dust mote is an autonomous node incorporating
sensing,computations , communication and a power source in
a cubic millimeter.
SMART DUST MEMS sensors, a MseOmTEic ConOdNuScItSoTrS l aOsFe:r diode and MEMS beamsteering
mirror for active optical transmission, a MEMS corner-cube
retroreflector
for passive optical transmission, an optical receiver,
signalprocessing
and control circuitry, and a power source based on
thick-film batteries and solar cells.
PROS:
Only baseband electronics are required.
Utilizes space-division multiplexing both in active and passive mode.
Dust motes need not radiate power, nor steer beam in passive mode.
Longer range up to about 10 km and higher bit rates up to about
Mbps can be.
achieved in active mode
CONS:
Requires line-of-sight path to base station, short range up to
about 1 km
and bit rate limited to about 10 kbps in passive mode of
transmission .
Affected by rain, fog, atmospheric turbulence
Requires higher power when used in active mode of
transmission.
APPLICATION
Collecting data for meteorological, geo physical or planetary
research.
Motion Sensing
Environmental Sensing(Weather Monitoring ) such as forest fires and
earthquakes
using, Pressure,Temperature,Light,Humidity sensors.
Everything of any value that we own will have it's own set of sensors,
letting we know when your tire pressure is low, the bridge ahead is
out (or unsafe), monitoring humidity and temperature to assess the
freshness of foods stored in the refrigerator or cupboard.
Military uses
tracking enemy troop movements
track poisonous chemical warfare agents in
the air
CONCLUSION
The significant reduction in size will enable sensors to be deeply
embedded in the physical world products or materials and spread
throughout our environment like smart grains of sand.
Free-space optical communication offers advantages in terms of
size, power and networking.
In the future NanoTechnology (the capability of building things
one molecule at a time) will create miniature sensors which wil
further reduce the size of the dust motes.
Wireless sensor networks is one area that promises to yield
important applications and demands new approaches to traditional
networking problems.
SMART DUSTgf.pdf (Size: 1.2 MB / Downloads: 50)
WHAT IS THE DUST
A dust mote is an autonomous node incorporating
sensing,computations , communication and a power source in
a cubic millimeter.
SMART DUST MEMS sensors, a MseOmTEic ConOdNuScItSoTrS l aOsFe:r diode and MEMS beamsteering
mirror for active optical transmission, a MEMS corner-cube
retroreflector
for passive optical transmission, an optical receiver,
signalprocessing
and control circuitry, and a power source based on
thick-film batteries and solar cells.
PROS:
Only baseband electronics are required.
Utilizes space-division multiplexing both in active and passive mode.
Dust motes need not radiate power, nor steer beam in passive mode.
Longer range up to about 10 km and higher bit rates up to about
Mbps can be.
achieved in active mode
CONS:
Requires line-of-sight path to base station, short range up to
about 1 km
and bit rate limited to about 10 kbps in passive mode of
transmission .
Affected by rain, fog, atmospheric turbulence
Requires higher power when used in active mode of
transmission.
APPLICATION
Collecting data for meteorological, geo physical or planetary
research.
Motion Sensing
Environmental Sensing(Weather Monitoring ) such as forest fires and
earthquakes
using, Pressure,Temperature,Light,Humidity sensors.
Everything of any value that we own will have it's own set of sensors,
letting we know when your tire pressure is low, the bridge ahead is
out (or unsafe), monitoring humidity and temperature to assess the
freshness of foods stored in the refrigerator or cupboard.
Military uses
tracking enemy troop movements
track poisonous chemical warfare agents in
the air
CONCLUSION
The significant reduction in size will enable sensors to be deeply
embedded in the physical world products or materials and spread
throughout our environment like smart grains of sand.
Free-space optical communication offers advantages in terms of
size, power and networking.
In the future NanoTechnology (the capability of building things
one molecule at a time) will create miniature sensors which wil
further reduce the size of the dust motes.
Wireless sensor networks is one area that promises to yield
important applications and demands new approaches to traditional
networking problems.