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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.

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