Acoustic-Doppler Velocimeter (ADV) for Laboratory Use

by Atle Lohrmann, SonTek, San Diego, United States,
Ramon Cabrera, SonTek, San Diego, United States,
Nicholas C. Kraus, (M.ASCE), SonTek, San Diego, United States,

Document Type: Proceeding Paper

Part of: Fundamentals and Advancements in Hydraulic Measurements and Experimentation


A remote-sensing, three-dimensional (3D) velocity sensor has been developed and tested for use in physical model facilities. The sensor is based on the Acoustic Doppler principle and measures the 3D velocity at a rate of 25 Hz in a sampling volume of less than 1 cm. The sensor is mechanically rugged, can be used in open-air physical model facilities, and can be readily moved from location to location with minimum setup time. A convenient interface operated on a PC allows instrument setup, file naming, and visual monitoring of the three flow components from simple menus. The instrument can replace several types of flow measurement instruments such as propeller gauges, electromagnetic gauges, Pitot tubes, LDVs, and hot-film anemometers, thereby simplifying procedures for technicians while providing continuous digital records at user-specified sampling rates.

Subject Headings: Acoustics | Doppler systems | Sensors and sensing | Flow measurement | Three-dimensional models | Physical models | Flow visualization | Measuring instruments

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