Transcript Sensor Network

SoNDa
Sensor Network for Data
Politehnica University of Bucharest
SoNDa Architecture
Sensor Motes
AVR Raven
• Development kit for wireless
802.15.4, 6LoWPAN si Zigbee.
• AVRRAVEN
– 2 Pico Power uC
– 2.4GHz Transceiver
– LCD, joystick, microphone
• AVRRZUSBSTICK
– Gateway node -> PC connection
– USB port
Sensor Node Architecture
• Wireless sensor node (mote)
• Runs Contiki OS and registers into an IPv6 ad-hoc
wireless network
• Multiple sensor slots
• Energy harvesting module
Wireless Power Metering
• Specialized sensor node
• Measures energy consumption from the 220VAC power grid
• Measured parameters:
– Voltage
– Current
– Active power
• Runs alongside the other existing sensor nodes
Sensors
• Temperature
• Light Intensity
• Humidity
• Acceleration
• Atmospheric Pressure
• CO2 Gas
• Methane Gas
• Diesel and Gasoline Exhaust
Application Scenarios
• Temperature → ambient temperature
reading in an area monitoring application or
a body sensor network.
• Light Intensity → estimating the total solar
illumination that a crop receives over the
course of a day, month or season. Smart
building management, turning lights on or
off depending on the outdoor light levels.
• Humidity → indoor humidity control, smart
crops - humidity levels are directly
associated to the occurrence of certain plant
diseases and pests like fungi.
Application Scenarios
• Atmospheric Pressure →
autonomous weather stations
composed of geographically
separate WSN islands situated in
remote locations.
• Acceleration → movement
detection in body sensor networks.
Seismic detection.
Application Scenarios
• CO2 Gas → indoor air quality
metering in a smart building
application.
• Methane Gas → leak detection
in household and industrial
appliances.
• Diesel and Gasoline Exhaust →
outdoor air quality metering.
Air pollution sensing in wireless
sensor networks deployed on a
highway or inside a major city.
Energy Storage Technologies
Energy Harvesting
• Technology that opens new
possibilities in device portability
and application functioning time.
• Well suited for powering remote
electronic devices (like WSN
nodes)
• The device is no longer battery
dependent. Its functioning time
can be prolonged indefinitely
Photovoltaic Conversion
I = IL − ID − ISH
IL
I = output current
IL = photogenerated current
ID = diode current
ISH = shunt current
Vj = V + IRS
V = voltage across the
output terminals
I = output current
RS = series resistance
ID
Ish
Rs
I
+
D
Rsh
-
Network Gateway
• NGW100 kit from Atmel with added
peripherals
• Two Ethernet ports, SD and MMC card reader,
• Runs a modified Linux version.
Smartphone
• Android-enabled
smartphone
• Runs a dedicated SoNDa
application
– Real-time vizualization of
sensor data
– Interactive menus and
graphs
SoNDa Software Architecture
• Heterogeneous WSN monitoring platform
• All nodes run ported versions of ContikiOS
• Measured parameters can be visualized from
anywhere in the world using MonALISA
(MONitoring Agents using a Large Integrated
Services Architecture)
• Allows data aggregation from multiple WSN
networks that may even be geographically
distinct
MonALISA GUI