Ultrasonic Wind Speed Measurement Based on Phase Shifting and Kalman Filter

In this paper presented an ultrasonic anemometer based on Kalman filter algorithm by using a phase shift technique of transmitted signal and received signal. The aim of paper are the study and test a model of ultrasonic anemometer by employing a phase detector which IC exclusive-or gate as a phase-shifter. Kalman Filter is used to estimate output signal and is done by microcontroller in order to decrease the noise and variance. This model can measure speed of wind 1.0 m/s to 11.5 m/s which have phase shift 0 to 180 degree with error is 8.34%.