Error analysis of an acoustic current meter

Accuracies of the benthic acoustic stress sensor (BASS) and the proposed modular acoustic velocity sensor (MAVS) are evaluated. A simple model of the hydrodynamic sources of error for acoustic current meters is presented and compared with the measured performance of BASS in a tow-tank and in field d...

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Bibliographic Details
Published inIEEE journal of oceanic engineering Vol. 16; no. 4; pp. 329 - 337
Main Authors Trivett, D.A., Terray, E.A., Williams, A.J.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.10.1991
Institute of Electrical and Electronics Engineers
Subjects
Acoustic applications
Acoustic measurements
Acoustic sensors
Acoustic transducers
Current measurement
Earth, ocean, space
Error analysis
Exact sciences and technology
External geophysics
Fluid flow measurement
Geophysics. Techniques, methods, instrumentation and models
Marine
Sea measurements
Stress
Velocity measurement
Accuracy
Error analysis
Instruments
Sea current
Current meter
Flow velocity
Acoustic sensor
Spectral analysis
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Summary:Accuracies of the benthic acoustic stress sensor (BASS) and the proposed modular acoustic velocity sensor (MAVS) are evaluated. A simple model of the hydrodynamic sources of error for acoustic current meters is presented and compared with the measured performance of BASS in a tow-tank and in field deployments. The sources of error addressed include those due to ideal flow around the sensor cage, wake effects from the support structure and transducers, vortex shedding from the cage, and electronic zero-point offsets. Electronic error dominates at velocities less than 5-10 cm/s, while flow disturbance dominates at higher speeds.< >
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ISSN:0364-9059
1558-1691
DOI:10.1109/48.90895