SMART DUST

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SMART DUST
MEMS
MTO

• K. Pister, J. Kahn, B. Boser
• (UCB)
• S. Morris
• (MLB)

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Goals

• Autonomous sensor node (mote) in 1 mm3
• MAV delivery
• Thousands of motes
• Many interrogators
• Demonstrate useful/complex integration in 1 mm3

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COTS Dust

• GOALS
• Create a network of sensors
• Explore system design issues
• Provide a platform to test Dust components
• Use off the shelf components

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COTS Dust - RF Motes

• Atmel Microprocessor
• RF Monolithics transceiver
• 916MHz, 20m range, 4800 bps
• 1 week fully active, 2 yr _at_1

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COTS Dust - Network Simulation

• Cheap platforms --gt Lots of nodes --gt
• Network challenges!

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COTS Dust - Optical Motes

• CCR mote
• 4 corner cubes
• 40 hemisphere

• Laser mote
• 650nm laser pointer
• 2 day life full duty

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CCR Interogator
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Video Semaphore Decoding
Diverged beam _at_ 5.2 km In shadow in evening sun
Diverged beam _at_ 300m Shadow or full sunlight
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1 Mbps CMOS imaging receiver
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Optical Communication (vs. RF)

• Pro
• low power
• small aperture
• spatial division multiplexing
• high data rates
• LPI/LPD
• baseband coding
• Con
• line of sight
• atmospheric turbulence

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Turbulent Channel
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Micro Mote - First Attempt
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2D beam scanning
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6-bit DAC Driving Scanning Mirror

• Open loop control
• Insensitive to disturbance
• Potentially low power

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Power and Energy

• Sources
• Solar cells
• Thermopiles
• Storage
• Batteries 1 J/mm3
• Capacitors 1 mJ/mm3
• Usage
• Digital control nW
• Analog circuitry nJ/sample
• Communication nJ/bit

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Dust Delivery

• Floaters
• Autorotators
• solar cells
• Rockets
• thermopiles
• MAVs

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MAV Delivery
Built by MLB Co.

• 60 mph
• 18 min
• 1 mi comm

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Applications

• DoD
• Battlefield sensor networks
• Sensor mine-fields, burrs and fleas
• Traffic mapping
• Captured terrain surveillance
• Bunker mapping
• ...

• Civilian
• High speed/low power IRDA
• Interactive virtual ballet
• ...