SMART DUST

-A WIRELESS SENSOR NETWORK

INTRODUCTION

Smartdust is a hypothetical system of many tiny

micro electro mechanical systems(MEMS). Such

as sensor etc.that can detect the light,tempurature

etc.

Improvements in circuit design,high

performance,shrink in size, and sensing

communication

The milli meter scale nodes are called “SMART

DUST” motes

Smart dust device

Components of smart dust

Mems technology in smart

dustSmart dust requires mainly revolutionary advances

in miniaturization, integration & energy

management.

Hence designers have used.

MEMS technology to build small sensors, optical

communication components, and power supplies.

Micro-electro mechanical systems consists of

extremely tiny mechanical elements, often

integrated together with electronic circuitory.

Component of mems

Operation of mote

Smart dust deviceis run by

microcontrller.

It read the data coming from sensors

and stores in SRAM.

the microcontroller will use the corner

cube retroreflector(ccr) or laser to

transmit sensor data or a message to

a base station or another mote.

This allows the user to change the

behavior of the mote remotely

Operation of mote

The laser diode contains the onboard

laser which sends signals to the base

station by blinking on and off.

The corner cube retroreflector ,

transmits information just by moving a

mirror and thus changing the reflection

of a laser beam from the base station.

MOTE

COMMUNICATION WITH SMART

DUST

Communication would be done on 2 ways

1.radio frequency

2.optical coomunication

Wireless communication facilitates simultaneous

data collection from thousands of sensors

Advantages of optical

communication

. Optical transceivers require only

simple baseband analog and digital

circuitory .

2. No modulators,active band pass

filters or demodulators are needed.

3. The short wavelength of visible or

near infra red light (of the order of 1

micron) makes it possible for a

millimeter scale device to emit a narrow

beam (ie, high antenna gain can be

achieved)

Thank you