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Accurate Ultrasonic Distance Measurement

Posted October 25, 2011 by Chris

“This paper introduces a different approach to the measurement of the time-of-flight of ultrasonic signals. Frequency variation monitoring and recording is used to determine accurately the arrival time of the ultrasonic signal. A high speed D.S.P. is used for both: transmission and direct measurement of the frequency of the incoming signal in every single period and with an accuracy of about 0.1%.”

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