SEMINAR PRESENTATION ON

WIRELESS SENSOR NETWORKS

GUIDED BY: SUBMITTED BY:ANSHU TOSHNIWAL JAIDEEP JANGIR

http://powerpointpresentationon.blogspot.com

• It avoid lot of wiring.• It can accommodate new devices at

any time.• Its flexible to go through physical

partitions.• It can be accessed through a

centralised monitor.

• It is very easy for hackers to hack it as we cant control propagation of waves.

• Comparitively low speed of communications.• Gets distracted by various elements like Blue-

tooth.• Still costly at large.

Wireless Sensor Network Architecture

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Applications of Sensor networks

Health applications Tele-monitoring of human physiological

data Tracking and monitoring patients and

doctors inside a hospital Drug administration in hospitals

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Military applications Monitoring friendly forces, equipment and

ammunition Reconnaissance of opposing forces and

terrain Battlefield surveillance Battle damage assessment Nuclear, biological and chemical attack

detection

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Environmental applications Forest fire detection Biocomplexity mapping of the

environment Flood detection Precision agriculture

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Direct Communication

Hierarchical Routing

Multihop Routing

Cluster Head

• Headers. • Each message generally has a header identifying its

source node, destination node, length of the data field, and other information.

• This is used by the nodes in proper routing of the message. In encoded messages, parity bits may be included.

• In packet routing networks, each message is broken into packets of fixed length.

• The packets are transmitted separately through the network and then reassembled at the destination.

• Mechanical Sensors o The Piezoresistive Effecto The Piezoelectric Effect o Capacitive Sensors o Inductive sensors

• Optical Transducers o Photoelectric effect o Photoconductive sensorso Junction-based photosensors

• Magnetic and Electromagnetic Sensorso Magnetoresistive effect o Magnetic Field Sensors

• Thermal Sensors o Thermo-Mechanical Transduction o Thermoresistive Effects o Thermocouples

• The emergence of wireless sensor networks can finally bridge the gap between physical and digital worlds, with the effect as if to establish nervous system for the physical world.

• It also allows measurement and monitoring in the way that is much closer to the phenomenon than ever before, resulting in continuous and high fidelity of data collected.