It tells about the connection of different wireless sensors so that data can be shared between them.the information provided by this environment is accessed by the user through internet.It has various topologies and protocols which you can see in this ppt.

1. SEMINAR PRESENTATION ON
WIRELESS SENSOR NETWORKS
GUIDED BY: SUBMITTED BY:
ANSHU TOSHNIWAL JAIDEEP JANGIR
http://powerpointpresentationon.blogspot.com

4. • 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.

5. • 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.

6. Wireless Sensor Network Architecture

8. 8
Applications of
Sensor networks

9. Health applications
 Tele-monitoring of human physiological
data
 Tracking and monitoring patients and
doctors inside a hospital
 Drug administration in hospitals
9

10. 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
10

11. Environmental applications
 Forest fire detection
 Biocomplexity mapping of the
environment
 Flood detection
 Precision agriculture
11

15. Direct Communication
Hierarchical Routing
Multihop Routing
Cluster Head

18. • 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.

20. • Mechanical Sensors
o The Piezoresistive Effect
o The Piezoelectric Effect
o Capacitive Sensors
o Inductive sensors
• Optical Transducers
o Photoelectric effect
o Photoconductive sensors
o Junction-based photosensors

21. • Magnetic and Electromagnetic Sensors
o Magnetoresistive effect
o Magnetic Field Sensors
• Thermal Sensors
o Thermo-Mechanical Transduction
o Thermoresistive Effects
o Thermocouples

22. • 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.