SMART DUST

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SMART DUST
MEMS
MTO

• K. Pister, J. Kahn, B. Boser
• (UCB)
• S. Morris
• (MLB)
• http//eecs.berkeley.edu/pister/SmartDust
• http//spyplanes.com

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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 - Distributed Algorithms

• 1, 100 Sensor nodes are easy
• algorithms?

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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_ 300m Shadow or full sunlight
San Francisco (Coit Tower) to Berkeley (Cory Hall)
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1 Mbps CMOS imaging receiver
Put an asynchronous receiver at every pixel
0.25 um CMOS in fab
Funded by DARPA/MTO/STAB
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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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8mm3 laser scanner
Two 4-bit mechanical DACs control mirror scan
angles. 6 degrees azimuth, 3 elevation
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Power and Energy

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

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Combustion

• Solid rocket propellant
• integrated igniter
• thermoelectric generator

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Dust Delivery

• Silicon maple seeds
• Silicon dandelions

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MAV Delivery
Built by MLB Co.
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• 60 mph
• 18 min
• 1 mi comm

6
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24 Bat
40 mph top speed 30 minute loiter autopilot
pressure sensor, gyros, XLs 2 planes, 1 ground
station, in 1 suitcase
spyplanes.com
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Marine LOE 4
3 MAVs participated, 1 flew
7 sorties on station in minutes
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Goal for 01
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Virtual Keyboard