Vendula Hejlová - Wireless sensor network components for monitoring air pollution in the urban environment: criteria and analysis of its selection
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Vendula Hejlová - Wireless sensor network components for monitoring air pollution in the urban environment: criteria and analysis of its selection

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  • 1. Wireless sensor network components for monitoring of air pollution in urban environment: criteria for their selection Author: Vendula HEJLOVÁ 1
  • 2. WHY TO MONITOR AIR POLLUTION? • serious problem nowadays • emissions of pollutants affect ecosystems, environment, human health and quality of life • sources of air pollution • antropoghenic • natural 2
  • 3. WIRELESS SENSOR NETWORK • new fast evolving technology consisted of small devices (nodes) situated in the field and the gathering point (gateway) • nodes are able to • communicate with each other (short, long distance) • communicate with gateway (basic station) • measure chosen environmental or socioeconomic characteristics in real time • be distributed in high density • used in domain environmental and socioeconomic 3
  • 4. WIRELESS SENSOR NETWORK COMPONENTS • 2 major groups of wireless sensor network components • hardware » nodes (may be equipped by sensors) » gateway • software 4
  • 5. PRE-SELECTION OF WIRELESS SENSOR NETWORK COMPONENTS • pre-selection steps involve: – – – – determination of the reason of building choosing the localization of the nodes determination of the number of nodes searching for the producers (analyzing commercially offered products (options)) – defining the criteria for the evaluation of selected options – defining the ideal option – comparing criteria parameters of offered options to the ideal (suggested) one 5
  • 6. CRITERIA FOR THE NODES SELECTION • criterion is in the decision making process called a scale and it is used for the comparison of parameters • every criterion is evaluated by its importance • nodes are the most important part of the wireless sensor network • 25 criteria, 8 groups of criteria for nodes were defined for the wireless sensor network which will be suitable for monitoring of air pollution in the urban area 6
  • 7. CRITERIA FOR THE NODES SELECTION Criteria group 1 2 3 Criteria Sensor boards/ sensors   » » » » » » sensor board for monitoring of air pollutants  from the producer possibilities for connecting sensors monitoring of air pollutants count of connected sensor boards/sensors sensor measurement interval [min] calibration built in sensors Communication models   » » » » communication among nodes communication possibilities communication range [m] topology Energy sources   » » » energy source  battery life [year] energy  consumption 7
  • 8. CRITERIA FOR THE NODES SELECTION Criteria group 4 5 6 7 8   Environmental resistance   » » Technical aspects » » » » Expansion options » » » Physical parameters   » » Price   » Criteria storage temperature [°C] encapsulation programming skills software memory size [KB] I/O flexibility sensor boards/sensors change GPS size [mm] weight [g] price [€] 8
  • 9. WIRELESS SENSOR NETWORK IN OLOMOUC (OWSN) • major aim - monitoring of air pollution • observed elements: • temperature,  humidity,  CO2,  CO,  NO2,  NH4,  VOC,  solar radiation, wind speed and direction • 15 nodes equipped with sensors 9
  • 11. 0,00 node nam e 11 CM5000 XM100 TinyNode586 MEP-SYS, temphum MEP-SYS multisensor MICA2 IMOTE2 IRIS (eKo Long Range) IRIS (eKo Standard) 0,40 criterion 0,30 node price node weight node size GPS, change of sensors, flexibility memory size programming skills 0,01 0 IRIS 0,50 protection 0,03 0,02 TelosB 0,60 LOTUS 0,70 is in operational range interval -30 +40 °C 0,80 MICAz 0,90 solar panel battery life battery powered 1,00 Waspmote Plug & Sense Waspmote PRO utility communication range communication in 3,4 GHz of 5 GHz protocol Zigbee communication between nodes built-in sensors calibration possibilities for connection sensors for pollutant monitoring sensors for measuring air pollutants from the producer weigth ANALYSIS WEIGHTS OF SUGGESTED CRITERIA determined by The Rank Based Method 0,1 0,09 0,08 0,07 0,06 0,05 0,04 UTILITY OF THE SELECTED OPTIONS 0,20 0,10