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International Journal of Thermophysics

, Volume 32, Issue 11–12, pp 2343–2350 | Cite as

Temperature Measurements on Hot Spots of Power Substations Utilizing Surface Acoustic Wave Sensors

  • M. A. M. Cavaco
  • M. E. Benedet
  • L. R. Neto
Article

Abstract

In several applications in the field of metrology, the direct connection of the sensor element with the respective signal-processing unit of the measurement system is not trivial. It can be mentioned, as an example, the measurement of hot points in electric power substations because of the high electrical potential. To solve that problem, two alternatives were studied, one using active surface acoustic wave (SAW) sensors and other using passive SAW tags. For the passive sensor, a SAW radio-frequency identification (RFID) temperature detector was used. That technology is widely applied for typical transport identification (grain transportation, road traffic control), but its application in the field of metrology is innovative. The variation in temperature makes an alteration in the characteristics of the piezoelectric material of the SAW matrix, changing mostly the resonance frequency. Using SAW–RFID, the problem of measuring temperature basically is directed to the identification of the frequency of resonance of the SAW. The use of active SAW sensors has been demonstrated to be much more satisfactory for the solution of such a problem because of the limitation in the range of the passive sensors.

Keywords

Active sensors Hot spots Passive sensors Radio-frequency identification (RFID) Surface acoustic wave (SAW) 

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References

  1. 1.
    K. Mitzner, E. Berkenpas, J. Sternhagen, M. Karlgaard, C. Wold, D. Galipeau, in Proceedings of the 2001 IEEE International Frequency Control Symposium and PDA Exhibition, Seattle, Washington, 2001, pp. 449–453Google Scholar
  2. 2.
    M. Brandl, S. Schuster, S. Scheiblhofer, A. Stelzer, in Proceedings of the 2008 IEEE International Frequency Control Symposium, Honolulu, Hawaii, 2008, pp. 284–289Google Scholar
  3. 3.
    L. Shujian, M. Lin, W. Danzhi, in Proceedings of the 2005 International Conference onCommunications, Circuits and Systems, 2005, p. 1113Google Scholar
  4. 4.
    Polh A.: IEEE Trans. Ultrason. Ferroelectr. Freq. Control 47, 317 (2000)CrossRefGoogle Scholar
  5. 5.
    Hamsch M., Hoffmann R., Buff W., Binhack M., Klett S.: IEEE Trans. Ultrason. Ferroelectr. Freq. Control 51, 1449 (2004)CrossRefGoogle Scholar
  6. 6.
    G. Ostermayer, A. Pohl, C. Hausleitner, L. Reindl, F. Seifert, in Proceedings of the 1996 IEEE 4th International Symposium on Spread Spectrum Techniques and Applications, vol. 2, Mainz, Germany, 1996, pp. 795–799Google Scholar
  7. 7.
    J. Nosek, in Proceedings of the IEEE International Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum, Geneva, Switzerland, 2007, pp. 208–215Google Scholar
  8. 8.
    Ostermayer G.: IEEE Trans. Microw. Theory Tech. 49, 809 (2001)CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • M. A. M. Cavaco
    • 1
  • M. E. Benedet
    • 1
  • L. R. Neto
    • 1
  1. 1.Federal University of Santa CatarinaFlorianópolisBrazil

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