A new method for sea wave detection by using a speed log meter

Author

Recolons, J. ; Torrents, J.M.

Author_Institution

Dept. of Nautical Sci. & Eng., Polytech. Univ. of Catalonia, Barcelona, Spain

fYear

2011

fDate

6-9 June 2011

Firstpage

1

Lastpage

10

Abstract

We present two different methods for measuring waves from the information provided by the speed log meter onboard. The first method processes data in the time domain, and is based in the measurement of the standard deviation of the voltage signal period at the transducer output. The second method is based in the measurement of the -3dB bandwidth of the frequency peaks in the spectral domain. Our results show a Lorentzian widening of the spectrum due to the effect of waves similar to the effect of jitter in electrical oscillators. As a predictable phenomenon, this work can lead to the design of new low-cost wave measurement systems and enhanced autopilot systems.

Keywords

geophysical signal processing; ocean waves; oceanographic techniques; signal detection; velocimeters; Lorentzian widening; electrical oscillators; enhanced autopilot systems; low-cost wave measurement systems; sea wave detection; speed log meter; voltage signal period; Bandwidth; Jitter; Marine vehicles; Noise; Sea measurements; Time measurement; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS, 2011 IEEE - Spain

Conference_Location

Santander

Print_ISBN

978-1-4577-0086-6

Type

conf

DOI

10.1109/Oceans-Spain.2011.6003521

Filename

6003521