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Wireless sensor networks in building automation systems
KTH, School of Information and Communication Technology (ICT).
KTH, School of Information and Communication Technology (ICT).
2014 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Tiny devices communicating wirelessly, also called wireless sensor networks, have developed rapidly the last few years. As the devices have been more energy efficient and more reliable new application areas have become interesting, one of them is building automation systems. Retrotting and additional temperature measurements are two interesting application areas to make the building automation systems more cost and energy efficient.

The aim for the work preformed has been to investigate the possibility of integrating wireless networks with existing building automation systems using open and widely used standards. The work process has involved evaluating existing business automation protocols. Each protocol has then been evaluated from an energy consumption perspective. The major dierent wireless technologies have been described in relation to the sensor networks. Finally a proof of concept implementation has been developed on a wireless sensor network connecting to a building automation system. The implementation has been made on the Contiki operating system, a lightweight operating system for small devices.

The work described in this master thesis shows that the Contiki operation systems with BACnet can be used to enhance existing building automation systems with wireless sensor network support. All listed protocols however lacks functionality for reducing number of messages required for protocol comparability (and reducing power consumption).

Abstract [sv]

Små enheter som kommunicerar trådlöst ofta benämnda som sensornätverk har under senare år utvecklats i hög takt. Nya applikationsområden har blivit intressanta allt eftersom enheterna har blivit mer energieektiva och tillförlitliga. Ett av dessa nya applikationsområden är fastighetsautomation, speciellt vi ombyggnation och utökad temperaturkontroll. Dessa områden är intressanta eftersom trådlösa sensornätverk kan innebära utökad kontroll och har en låg installationskostnad.

Målet med arbetet har varit att undersöka hur väl trådlösa sensornätverk kan integreras med existerande system för fastigautomation. Metoden för detta har inkluderat en genomgång av system för fastighetsautomation samt kända protokoll för detta. Varje protokoll har evaluerats utifrån protokollets kommunikationsmetod och uppskattad energiåtgång. Arbetet innehåller en genomgång av olika trådlösa nätverksprotokoll och hur de relaterar till sensornätverk. Slutligen har vi utvecklat en testapplikation på enheter anpassade för sensornätverk och integrerat denna med BACnet ett protokoll för fastighetsautomation.

Arbetet som beskrivs i denna uppsats visar att det går att integrera system för fastighetsautomation med trådlösa sensornätverk. Däremot saknar alla beskrivna protokoll för fastighetsautomation stöd för att minska strömförbrukning och kommunikation, vilket är en viktig del för implementeringen av större trådlösa nätverk.

Place, publisher, year, edition, pages
2014. , 77 p.
Series
TRITA-ICT-EX, 2014:138
National Category
Computer and Information Science
Identifiers
URN: urn:nbn:se:kth:diva-177368OAI: oai:DiVA.org:kth-177368DiVA: diva2:872482
Examiners
Available from: 2015-12-01 Created: 2015-11-19 Last updated: 2017-08-03Bibliographically approved

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