Advances in Doppler sonar technology

2002 ◽  
Author(s):  
R. Pinkel ◽  
M. Merrifield ◽  
J. Smith ◽  
H. Ramm
Keyword(s):  
Doppler Sonar

Phased array Doppler sonar transducer

1987 ◽  
Vol 82 (4) ◽  
pp. 1469-1469
Author(s):  
Robert L. Simmons ◽  
Clifton M. Wyant
Keyword(s):  
Phased Array ◽  
Doppler Sonar

Food Intake Detection Using Ultrasonic Doppler Sonar

2017 ◽  
Vol 17 (18) ◽  
pp. 6056-6068 ◽  
Author(s):  
Ki-Seung Lee
Keyword(s):  
Food Intake ◽  
Doppler Sonar

Recent development in Doppler sonar technology

2002 ◽  
Author(s):  
R. Pinkel ◽  
H. Merrifield ◽  
J. Smith
Keyword(s):  
Doppler Sonar

Remote measurement of internal waves in the sea with Doppler sonar

1989 ◽  
Vol 1 (2) ◽  
pp. 149-153
Author(s):  
K. V. Konyaev ◽  
E. A. Leont'eva ◽  
S. I. Muyakshin
Keyword(s):  
Internal Waves ◽  
Remote Measurement ◽  
Doppler Sonar

scholarly journals SwathDop: Multibeam Pulse-Coherent Doppler Sonar for Scanning 2D Velocity Sections near the Sediment–Water Interface

2019 ◽  
Vol 36 (11) ◽  
pp. 2153-2169
Author(s):  
Mahdi Razaz ◽  
Len Zedel ◽  
Alex E. Hay
Keyword(s):  
Sediment Transport ◽  
Software Defined Radio ◽  
Wide Band ◽  
Preliminary Test ◽  
Unidirectional Flow ◽  
Sonar System ◽  
Median Diameter ◽  
Independent Observations ◽  
Signal Processing Algorithms ◽  
Doppler Sonar

AbstractThis paper considers the problem of accurately measuring the sediment transport over bedforms where flow evolves continuously both in time and space. For this purpose, we have developed a pulse-to-pulse coherent Doppler sonar system designed in bistatic geometry with two fan-beam transmitters symmetrically positioned on each side of a multielement receive array. The system resolves 2D velocity components within a ±20° (~0.5 m by ~0.5 m) swath. The software-defined radio data acquisition and control system limited us at present to eight independent receiver channels, and consequently the azimuthal resolution of the system is 4°. As a preliminary test of the sonar system, the system operation was simulated using a model developed to predict coherent sonar performance. The uncertainties with respect to the prescribed values and mean measurements in the model results were confined to 0.35 and 0.23 cm s−1, respectively, in the presence of strong shear (~150 s−1) and 50 cm s−1 horizontal flow. An important thing is that the model allowed us to test and develop the signal processing algorithms necessary to invert the multibeam sonar data. Using sand of 0.4-mm median diameter, the laboratory trials were carried out in active sediment transport conditions over dunes with 2-m wavelength and ~0.90 m s−1 unidirectional flow velocities. The results presented here focus mainly on 2D velocity field and indicate an average 4% deviation from the wake law and 8% from independent observations made with the wide-band multifrequency coherent Doppler profiler (MFDop) instrument under similar flow conditions.

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