Smart Dust

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  • Topic: Microelectromechanical systems, Wireless sensor network, Optical fiber
  • Pages : 12 (4024 words )
  • Download(s) : 411
  • Published : May 20, 2012
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1. Abstract……………………………………………………….. 1 2. Introduction…………………………………….…………….. 2 3. Design & Analysis…..……………………………………….. 3 4. Result ………………………………………………………… 10 5. Conclusion…………………………………………………..... 10 Smart Dust Shilpa Nagod

Page 1 of 10
SMART DUST
1.Abstract
'Smart' dust’ is a minute grain of silicon that spontaneously assembles, orients and senses its local environment, a first step toward fan development of rebels the size of sand grains that could be used in medicine, bioterrorism surveillance and pollution monitoring. Its is a hypothetical system of many tiny microelectromechanical systems (MEMS) such as sensors, robots, or other devices, that can detect light, temperature, vibration, magnetism or chemicals. These are usually networked wirelessly and are distributed over some area to perform tasks like sensing.

Advances in hardware technology has enabled very compact, autonomous and mobile nodes each having one or more sensors, computation and communication capabilities ,and a power supply. The Smart Dust project is exploring whether an autonomous sensing, computing, and communication system can be packed into a cubicmillimeter mote to form the basis of integrated, massively distributed sensor networks. It focuses on reduction of power consumption, size and cost. To build these small sensors, processors, communication devices, and power supply , designers have used the MEMS technology.

Smart Dust nodes otherwise known as motes are usually of the size of a grain of sand and each mote consists of :
1.Sensors
2. Transmitter & Receiver enabling bidirectional wireless communication. 3. Processors and control circuitory
4. Power supply unit
Using smart dust nodes, the energy to acquire and process a sample and then transmit some data about it could be as small as a few nanoJoules. These dust motes enable a lot of applications, because at these small dimensions ,these motes can be scattered from aircraft for battle field monitoring or can be stirred into house paint to create the ultimate home sensor network. Large-scale networks of wireless sensors are becoming increasingly tractable. Advances in hardware technology and engineering design have led to dramatic reductions in size, power consumption and cost for digital circuitry, wireless communications and Micro ElectroMechanical Systems (MEMS). This has enabled very compact, autonomous and mobile nodes, each containing one or more sensors, computation and communication capabilities, and a power supply. The missing ingredient is the networking and applications layers needed to harness this revolutionary capability into a complete system. We review the key elements of the emergent technology of “Smart Dust” and outline the research challenges they present to the mobile networking and systems community, which must provide coherent connectivity to large numbers of mobile network nodes co-located within a small volume. The study of “Smart Dust systems” is very new. The main purpose of this paper is to present some of the technological opportunities and challenges, with the goal of getting more systemslevel researchers interested in this critical area.

SMART DUST Shilpa Nagod
Page 2 of 10
2. Introduction
"Smart dust" devices are tiny wireless microelectromechanical sensors (MEMS) that can detect everything from light to vibrations. These " dust motes" could eventually be the size of a grain of sand, though each would contain sensors, computing circuits, bidirectional wireless communications technology and a power supply. Motes would gather scads of data, run computations and communicate that information using two-way band radio between motes at distances approaching 1,000 feet. The goal for researchers is to get these chips down to 1mm on a side. Current motes are about 5mm. As the research community searches for the processing platform beyond the personal computer, networks of wireless sensors have become quite interesting as a new environment in which to seek...
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