DocumentCode :
398849
Title :
Managing concurrent duties and time of wireless sensors in electrical power systems
Author :
Nordman, Mikael M. ; Lehtonen, Matti ; Vähämäki, Olavi
Author_Institution :
Power Syst. Lab., Helsinki Univ. of Technol., Espoo, Finland
Volume :
1
fYear :
2003
fDate :
16-19 Sept. 2003
Firstpage :
521
Abstract :
This paper presents a new method for managing concurrent duties and time in low-power wireless sensor cells that monitor electrical power systems. The method is based on the co-operation of two interrupt levels, one generated locally in every sensor that is part of the cell, the other generated as the response to a signal that is sent out by some base station. With this method very precise synchronization of concurrent duties can be achieved at a very low energy cost. The same signal can also be used to provide an accurate timestamp of events that the system will generate. Experiments show that the method is successful in the case that the duration between two subsequent concurrent duties is relatively short. For longer periods it is predicted that the deviation among clocks can cause problems. A solution to this is presented in the paper. This solution is based on dividing the duration between two concurrent duties into shorter steps that the sensors may utilize to keep the synchronization at a feasible level.
Keywords :
power system measurement; synchronisation; time management; wireless sensor networks; concurrent duties; electrical power systems; electrical power systems monitoring; low energy cost; low power wireless sensor cells; signal response; synchronization; time management; wireless sensors; Base stations; Clocks; Costs; Energy management; Monitoring; Power system management; Sensor systems; Signal generators; Synchronization; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Emerging Technologies and Factory Automation, 2003. Proceedings. ETFA '03. IEEE Conference
Print_ISBN :
0-7803-7937-3
Type :
conf
DOI :
10.1109/ETFA.2003.1247751
Filename :
1247751
Link To Document :
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