788.11j presentation “deploying a wireless sensor network on an active volcano” presented by...
TRANSCRIPT
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788.11J Presentation“Deploying a Wireless Sensor Network
on an Active Volcano”
Presented by
Ahmed Farouk Ibrahim Gaffer
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Agenda
• The main idea
– General description
– How it works
• Main achievements
• Requirements of Studying Active Volcanoes
• Challenges
• Pictures
• Innovations
• Future work
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THE MAIN IDEA
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General Description
• Study an active volcanoes using a wireless sensor
network.
• Use an array consisted of 16 node equipped with
seismoacoustic sensors deployed over 3 km.
• The network is monitored and controlled by a
laptop base station, located at a makeshift
volcano observatory roughly 4 km from the
sensor network itself.
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How It Work
• When a node detects an interesting event, it
routes a message to the base station laptop.
• If enough nodes report an event within a short
time interval, the laptop initiates data collection
protocol called Fetch.
• The laptop downloads between 30 and 60
seconds of data from each node using a reliable
data collection protocol (Fetch).
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How It Work (cont)
• ensuring that the system retrieves all buffered
data from the event.
• When data collection completes, nodes return to
sampling and storing sensor data.
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MAIN ACHIEVEMENTS
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The Main Achievements
• The new node are smaller, lighter, and consume
less power.
• Developed a reliable data collection protocol
• Real-time network control and monitoring for
data-acquisition equipments
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REQUIREMENTS OF STUDYING ACTIVE VOLCANOES
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Requirements of Studying Active Volcanoes
• high data rates,
• high data fidelity,
• Sampled data to be accurately time stamped,
• sparse arrays with high spatial separation
between nodes.
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CHALLENGES
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The Challenges
•Low Radio Bandwidth of the network
•The physical deployment of the network
•The study requires high data fidelity, high data
rates and sparse arrays with high spatial separation
between nodes
•Reliable data Transmission and Time
Synchronization
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PICTURES
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Deployment site Reventador Volcano, Ecuador
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System Design
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Network Topology
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Sensor Deployment Map
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The node
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INNOVATION
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Innovation
•Event Based Triggering
•Use a local buffer (memory) to store data
•Signal Processing
•Developed a reliable data-collection protocol
(called fetch) to retrieve buffered data from each
node
•Long-Distance radio link between the observatory
and the sensor network
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Future Work
• Improving sensor-network design and pursuing
additional deployments at active volcanoes
• focus on improving event detection and
prioritization
• optimizing the data collection path
• deploy a much larger (100-node) array for several
months, with continuous Internet connectivity via
a satellite uplink
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QUESTIONS
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THANK YOU