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Maximum-Likelihood Data Fusion of Phase-Difference and Threshold-Detection Techniques for Wind-Speed Measurement

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3 Author(s)
Villanueva, J.M.M. ; Pontifical Catholic Univ. of Rio de Janeiro, Rio de Janeiro ; Catunda, S.Y.C. ; Tanscheit, R.

Analyses of threshold-detection and phase-difference techniques for wind-speed measurement using ultrasonic transducers are presented. The influence of uncertainties that are associated with additive noise and attenuation of the ultrasonic signal on the wind-speed measurement uncertainty is analyzed. A data-fusion procedure based on the maximum-likelihood estimation (MLE) algorithm is developed for the determination of wind speed, with data gathered through threshold-detection and phase-difference techniques. The data-fusion procedure provides a lower measurement uncertainty than those obtained with the above techniques when taken separately. Practical design issues are considered, and an application example is shown to illustrate the proposed procedure.

Published in:

Instrumentation and Measurement, IEEE Transactions on  (Volume:58 ,  Issue: 7 )

Date of Publication:

July 2009

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