CoreyPittman-WirelessSensorNetworks

CoreyPittman-WirelessSensorNetworks - Wireless Sensor...

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Unformatted text preview: Wireless Sensor Networks Presented By: Corey Pittman Outline Introduction Wireless Sensor Networks Applications of Wireless Sensor Networks Sensor Nodes Constraints Communication Architecture Conclusion Introduction Classical sensors can be Low number of distant, complex sensors use complex methods to reduce noise. Several dedicated sensors are carefully placed around a phenomenon. Wireless Sensor Networks consist of a very large number of sensor nodes that are deployed in or around the phenomenon. Arrangement doesn't matter. Process data before transmitting. Wireless Sensor Networks Consist of a large number of nodes. Contain sensors for many ambient conditions, such as: Temperature Humidity Pressure Noise Can constantly feed information about events or upon request. Wireless, Can be deployed without worrying much about layout. Applications Military Monitoring friendlies Surveillance/Reconnaissance Targeting Environmental Forest fire detection Flood detection Precision Agriculture Home Automation Inventory Management Fleet Tracking What is a Sensor Node? Also called a mote, it is a node in a wireless network. Typically developed using low cost components. Main components include: Processing Unit/Micro-controller Tranceiver External Memory Power Source Sensor(s) Examples Sun SPOT Smart Dust Diagram ADC is Analog to Digital converter Constraints Consume Low Power Operate efficiently in high numbers Be "cheap" Be Adaptive Autonomous Properties Fault Tolerance Battlefield vs Home Environment Scalability Putting sensors on everything Production costs Cost of WSN < Traditional Sensors Piconode's goal is price under $1 Resilience Function properly under high pressure. Deployment Deployment phase Drop from plane, delivery from projectile, catapult Careful placement by human Post-deployment phase Malfunction, energy depletion, and other topology changes mean that the network must be dynamic. Communication Architecture Sensors are scattered in the sensor field. Collect data from one another and route to sink. Client can find information from sink via Internet. Layout Sensor Networks Protocol Transport layer Sink to nodes is UDP, Sink to Internet is TCP Network layer SPIN protocol (Advertise, Request, Data) Directed Diffusion Physical layer Ultra Wide Band Low transmission power and simple tranceiver Modern Smart "Dust" One million HP-made motes are to be deployed over a 6 square mile to monitor rock vibrations near oil exploration. Each is the size of a matchbook. References Wireless Sensor Networks: A Survey Akyildiz, Su, Et. Al. "'Smart dust' aims to monitor everything" http://articles.cnn.com/2010-05-03/tech/smart.dust. sensors_1_smart-dust-sensors-kris-pister?_s=PM:TECH Wireless Sensor Networks & Sensor Nodes Wikipedia Conclusion Smart Dust will not become the deadly nanotechnology of '50s sci-fi anytime soon. ...
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CoreyPittman-WirelessSensorNetworks - Wireless Sensor...

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