Title:
SYSTEM AND METHOD FOR MEASURING WAVE DIRECTIONAL SPECTRUM AND WAVE HEIGHT
Document Type and Number:
WIPO Patent Application WO2000020893
Kind Code:
A3
Abstract:
A system and method for measuring the directional spectrum of one or more waves in a fluid medium using a multi-beam sonar system (100). In an exemplary embodiment, range cells located within a plurality of acoustic beams (104) are sampled to provide current velocity data. Optionally, wave surface height and pressure data is obtained as well. This velocity, wave height, and pressure data is Fourier-transformed by one or more signal processors (178) within the system (100), and a surface height spectrum produced. A cross-spectral coefficient matrix at each observed frequency is also generated from this data. A sensitivity vector specifically related to the ADCP's transducer array (103) geometry is used in conjunction with maximum likelihood method (MLM), iterative maximum likelihood method (IMLM), or other similar methods to solve the wave equation at each frequency and produce a frequency-specific wave directional spectrum. Ultimately, the frequency-specific spectra are combined to construct a complete two-dimensional wave directional spectrum. The system (100) is also capable of measuring current profile as a function of depth in conjunction with wave direction and wave height.
Inventors:
BRUMLEY BLAIR H
TERRAY EUGENE A
STRONG BRANDON S
TERRAY EUGENE A
STRONG BRANDON S
Application Number:
PCT/US1999/017619
Publication Date:
October 26, 2000
Filing Date:
August 04, 1999
Export Citation:
Assignee:
ROWE DEINES INSTR (US)
International Classes:
G01C13/00; G01S7/526; G01S15/58; G01S15/62; (IPC1-7): G01S15/58; G01C13/00
Foreign References:
| US5208785A | 1993-05-04 | |||
| GB2128833A | 1984-05-02 | |||
| US5521883A | 1996-05-28 |
Other References:
TERRAY E ET AL: "Measuring wave height and direction using upward-looking ADCPs", OCEANS '97. MTS/IEEE. CONFERENCE PROCEEDINGS (CAT. NO.97CH36105). HALIFAX, NS, CANADA, 6-9 OCT. 1997, 1997, New York, NY, USA, IEEE, USA, pages 287 - 290 vol.1, XP002137593, ISBN: 0-7803-4108-2
KIRLIN R L: "Estimation of transfer function parameters with output Fourier transform sensitivity vectors", 1997 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (CAT. NO.97CB36052). MUNICH, GERMANY, 21-24 APRIL 1997, 1997, Los Alamitos, CA, USA, IEEE Comput. Soc. Press, USA, pages 3933 - 3936 vol.5, XP002137594, ISBN: 0-8186-7919-0
TERRAY E A ET AL: "MEASURING WAVE DIRECTION USING UPWARD-LOOKING DOPPLER SONAR", PROCEEDINGS OF THE WORKING CONFERENCE ON CURRENT MEASUREMENT,US,NEW YORK, IEEE, vol. CONF. 4, 1990, pages 252 - 257, XP000214385
TERRAY E A ET AL: "Measuring waves and currents with an upward-looking ADCP", PROCEEDINGS OF THE IEEE SIXTH WORKING CONFERENCE ON CURRENT MEASUREMENT (CAT. NO.99CH36331). SAN DIEGO, CA, USA, 11-13 MARCH 1999, 1999, Piscataway, NJ, USA, IEEE, USA, pages 66 - 71, XP002137595, ISBN: 0-7803-5505-9
KIRLIN R L: "Estimation of transfer function parameters with output Fourier transform sensitivity vectors", 1997 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING (CAT. NO.97CB36052). MUNICH, GERMANY, 21-24 APRIL 1997, 1997, Los Alamitos, CA, USA, IEEE Comput. Soc. Press, USA, pages 3933 - 3936 vol.5, XP002137594, ISBN: 0-8186-7919-0
TERRAY E A ET AL: "MEASURING WAVE DIRECTION USING UPWARD-LOOKING DOPPLER SONAR", PROCEEDINGS OF THE WORKING CONFERENCE ON CURRENT MEASUREMENT,US,NEW YORK, IEEE, vol. CONF. 4, 1990, pages 252 - 257, XP000214385
TERRAY E A ET AL: "Measuring waves and currents with an upward-looking ADCP", PROCEEDINGS OF THE IEEE SIXTH WORKING CONFERENCE ON CURRENT MEASUREMENT (CAT. NO.99CH36331). SAN DIEGO, CA, USA, 11-13 MARCH 1999, 1999, Piscataway, NJ, USA, IEEE, USA, pages 66 - 71, XP002137595, ISBN: 0-7803-5505-9
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