hejlova - parametres of wsn for temperature monitoring
DESCRIPTION
Presentation from Third InDOG Doctoral Conference in Olomouc, Czech Republic. 13. - 16. October 2014TRANSCRIPT
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PARAMETERS OF WIRELESS SENSOR NETWORK FOR TEMPERATURE
MONITORING
Vendula HEJLOVÁDepartment of Geoinformatics, Palacký University in Olomouc
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Introduction
• Wireless Sensor Network• Parameters of wireless sensor network that
have to be known at the beginning• The research area• Results• Conclusion
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Wireless Sensor Network (WSN)
• new fast evolving technology that can be used in environmental and socioeconomic domain
• every wireless sensor network consists of:– nodes equipped with sensors– gateway (gathering point)– server (long time storage, visualization)
• every node communicates with the defined node(s) to direct the measured values to a gateway (depends on the used topology)
• electromagnetic waves are used for communication
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The Research Area
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Parameters of Wireless Sensor Network That Have to be Known at the Beginning
• Application of Wireless Sensor Network• Capabilities of Wireless Sensor Network
Components• Terrain Factors• Weather Conditions of the Research Area
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Capabilities of Wireless Sensor Network
• the used nodes – four Waspmote Plug&Sense, produced by Libelium
• used sensors – temperature, relative humidity• star topology• communication was carried out on the basis of
802.15.4– this protocol works in the range of 3.4 GHz, channel
0x0C (2.405 – 2.410 GHz)• gathering point of data was gateway, Meshlium,
data were stored in local MySQL database• observation period was from 8th April to 14th April
2014
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Position of Nodes
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Topology of Wireless Sensor Network
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Terrain Factors
• related to:– landcover, – obstacles in the communication path,– property conditions, – security issue,– measured elements
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Terrain Factors
• nodes were fixed at coniferous trees at a height of 2 metres above the ground
• southwest orientation• 10 minute recording intervals
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Results
• include the confirmation of transmission protocol correctness
• visualization of average daily temperatures, extreme temperatures and temperature amplitudes
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ResultsAverage Daily Temperatures
• the highest average daily temperature at place B (4)
• but the highest average daily temperature was computed for place A (13.79 °C)
• the lowest temperatures mostly occured at place C (4), 4.03 °C 8.4.2014 9.4.2014 10.4.2014 11.4.2014 12.4.2014 13.4.2014 14.4.2014
0
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AVERAGE DAILY TEMPERATUREin the Botanic Garden from 8th to 14th April
A
B
C
D
Day
Te
mp
era
ture
[°C
]
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ResultsExtreme Temperatures
8.4.2014 9.4.2014 10.4.2014 11.4.2014 12.4.2014 13.4.2014 14.4.2014-1
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EXTREME TEMPERATURESin the Botanic Garden in Olomouc
MAXAMAXBMAXCMAXDABCDMEDAMEDBMEDCMEDD
Day
Te
mp
era
ture
[°C
]
• the highest number of the highest daily temperatures was recorded by node A (4)
• daily maximum temperatures recorded by node C were in the most cases (5) the lowest
• the lowest temperatures from minimum temperatures were recorded by node C (6)
• the highest temperature values from minimum temperatures were obtained by node B (6)
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ResultsTemperature Amplitudes
8.4.2014 9.4.2014 10.4.2014 11.4.2014 12.4.2014 13.4.2014 14.4.20140123456789
1011121314151617181920
TEMPERATURE AMPLITUDEin the Botanic Garden from 8th to 14th April
A
B
C
D
Day
Te
mp
era
ture
[°C
]
• the highest temperature amplitudes were recorded by node A (4)
• the lowest differences in temperature values were recorded by node D (4)
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Conclusion• monitoring of temperature using wsn is realized in the real
time and with high density• differences in measured temperature values are high even in
the small area• the highest values of temperature amplitudes were recorded
by node A (13.92 °C), the lowest temperature amplitude was recorded by node D (12.07 °C)
• this was a pilot study for testing of trasmission protocol and investigating of differences between temperature values measured under the same conditions in a small area
• measurements in larger area, with more nodes equipped with more variety of sensors will be carried out during autumn 2014
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• Thank you for your attention