Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Multipurpose Ship Minor for the Swedish Coast Guard
KTH, Superseded Departments, Aeronautical and Vehicle Engineering. (Marina system)
2004 (English)Student thesis
Abstract [en]

This survey is about how to measure the sea state. A view of the existing tecniques on the market and, when possible, the prices of now existing products is presented. The mainpurpose is to investigate the possibility to measure waves with an inexpensive free drifting wavebuoy. The maximum material cost has been set to around 3000 kr, which severely limits the possibilitis. Ideas of how to analyse data from such a buoy and analysehow reliable this data can possibly become, is presented. A prototype of a wavebuoy is described and also the test results of the buoy, together whith descriptions of how thetests have been conducted. Effort has been made to put light on the kind of problems and errors that may occure when using these methods. The tests have shown that it is possibleto measure waves with a free floating wavebuoy with only one accelerometer as activesensor. The design of the buoy is important to minimize the movements of the buoy,since when tilted the buoy does not give accurate data. The incoming data must befiltered and when that is done the bandwhith of the buoy decreases. In this case the buoycan measure waves with frequencies over 0.14 Hz, which in deep water means waves with wavelength less than 80 m. It is important to know that far too few tests in different wavespectras have been conducted to be sure of the achieved results. Further tests and investigations should be made and this survey is to be seen as a first step.

Place, publisher, year, edition, pages
2004. , 89 p.
Identifiers
URN: urn:nbn:se:kth:diva-11104OAI: oai:DiVA.org:kth-11104DiVA: diva2:235804
Presentation
(English)
Uppsok

Supervisors
Examiners
Available from: 2009-09-18 Created: 2009-09-18 Last updated: 2010-04-28

Open Access in DiVA

fulltext(2496 kB)1003 downloads
File information
File name FULLTEXT01.pdfFile size 2496 kBChecksum SHA-512
7f16e46ddd5a89f32f36e5b7cd119217cdddda79fcc22dc303fe1a8dc4821e0cc1a98a406fda4513650f57d780d134f0da2864ce02e4e8284c00ad649b4f6b2a
Type fulltextMimetype application/pdf

By organisation
Aeronautical and Vehicle Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 1003 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 176 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf