Smart Dust,the Future Giant .......................

Smart Dust in a Fingure

• It is mainly Micro-Electro Mechanical System.   It combines  sensing, robotics, computing  that can sense light, temperature ,vibration,magnetism or chemicals.

         They are usually networked wirelessly and are distributed over some area to perform tasks, usually sensing.Smart dust was invented in 2001 by Kristopher S. J. Pister, who is an electrical engineering and computer science professor for the University of California

Smart Dust Component

CCR

It comprises three mutually perpendicular mirrors of gold-coated polysilicon

The CCR has the property that any incident ray of light is reflected back to the source

Using a micro-fabricated CCR, we can achieve data transmission at a bit rate up to 1 kilobit per second, and over a range up to 150 meters, using a 5milliwatt illuminating laser

Operation On Mote (Single unit of smart dust)

Periodically the microcontroller gets a reading from one of the sensors, which measure one of a number of physical or chemical stimuli such as temperature, ambient light, vibration, acceleration, or air pressure, processes the data, and stores it in memory.

It also occasionally turns on the optical receiver to see if anyone is trying to communicate with it

This communication may include new programs or messages from other motes

Microcontroller  will use the corner cube retro reflector or laser to transmit sensor data or a message to a base station or another mote.

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