Smart dust ppt

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Published Date:09-03-2017
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Smart DustContents × What is Smart Dust ? × How its work ? × History of smart dust. × Smart Dust Mote × Introduction × Architecture × Smart Dust Components × Measurement , characteristic, & working of smart dust × Communication with Smart Dust × Application × Challenges × ConclusionIntroduction  Smart dust is a tiny dust size device with extra-ordinary capabilities.  Smart dust combines sensing, computing, wireless communication capabilities.  Have power supply within volume of only few millimeters and that too at low cost.  These devices are proposed to be so small and light in weight that they can remain suspended in the environment like an ordinary dust particle.What is Smart Dust ?  "Smart dust" devices are tiny wireless micro electro mechanical sensors (MEMS) that can detect everything from light to vibrations.  Nodes in Smart Dust are called Motes.  These "motes" contain sensors, computing circuits, bidirectional wireless communications technology and a power supply integrated on a tiny dust size-device.History of Smart Dust × 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 × The DARPA (NASA) has been funding Smart Dust research heavily seeing virtually limitless applications in the sphere of modern warfare. In 2001 In 2008 × Kristofer S. J. PisterMote & its operation  Smart dust device is run by microcontroller.  It read the data coming from sensors and stores in SRAM.Operation of mote  The microcontroller will use the corner cube retro reflector (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.  The laser diode contains the onboard laser which sends signals to the base station by blinking on and off.  The corner cube retro reflector, transmits information just by moving a mirror and thus changing the reflection of a laser beam from the base station.Making of Smart Dust “Architecture A single Smart Dust mote has: × A semiconductor laser diode and MEMS beam steering mirror for active optical transmission. × A MEMS corner cube retro-reflector for passive optical transmission. × An optical receiver. × A signal processing and control circuitry. × A power source based on thick-film batteries and solar cells.Architecture Smart dust componentMeasurement of Smart Dust  These are made by “Hitachi”.  They measure only “.15 × .15” mm each and have GPS capabilities.  Sometimes called “smart dust” as they can be sprayed on us and absorbed or taken in foods, drinks and even injected.Working of Smart Dust × Primary constraint of smart dust is volume. × Most of the time mote if off with only timers running. × Run by microcontroller. × Determines the task performed by the mote. × Controls power. × When a timer expires, it powers mote to carry out a job, then powers off. Smart Dust Device .Characteristics of Smart Dust Besides the It has one week functionality it has lifetime in bi-directional It has 20 meter continuous Current motes are radio, the communication operation, 2 years about 5mm microprocessor range with 1% duty controller, and the cycling. battery.Key Features of these electronic particles Power “ - Survive for extended amount of time Computation Process Sensor Data and Communicate Sensors - To Interface to the environment Communication - To glue the pieces of informationPower - Big Problem Solar - Low capacity per unit of mass and volume Vibration - Needs support by Acoustic sleep Power: mechanism noise Lithium and low Battery power techniques Thermal conversion - Not really so Nuclear much innovation Reaction after Volta Fuel CellsComputation Computation: ATMEL91M404000 • -Core and variety of different functions • -Flash , SRAM , E2PROM • -GPIO , ADC , PWM ,Comparator • -Embedded serial Buses Micro Controller • -Ex: Microcontrollers Atmel , Microchip, Motorola Microprocessors Intel Strong-Arms ,Motorola • Not Traditional Style Of programming • Hardware Descriptive Languages (VHDL, Verilog) FPGA • Faster, Low Power, Reconfigurable • Ex: Xilix, AtmelSENSOR Motion Sensing - Magnetometer - Accelerometer Environmental Sensing (Weather Monitoring) - Pressure - Temperature - Light - HumidityCommunication Technologies Radio Frequency Optical transmission Transmission technique a) Passive Laser based Communication b) Active Laser based Communication c) Fiber Optic Communication