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SIcon/05– Sensors for Industry Conference Houston Texas, USA, 8-10 February, 2005 An Ultrasonic/Optical Pulse Sensor for Precise Distance Measurements Darold Wobschall, Ming Zeng and Bhooma Srinivasaraghavan Department of Electrical Engineering, University at Buffalo, Amherst, NY 14260 and Esensors, Inc., Amherst NY 14226 Abstract – The combined ultrasonic transit time and optical pulse method described here is an improvement over the standard ultrasonic echo by providing a lower signal loss and more precise location of sensor reference points, specifically the transmitting and receiving transducers.
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