Mjerenje profila brzine morskih struja akustičkom metodom

Skelin, Dražan

No public access

scientific master's theses

9 0

Measurement of the sea current velocity profiles by acoustic method

Dražan Skelin (2011)

University of Zagreb
Faculty of Electrical Engineering and Computing
Department of Electroacoustics

Cite this document

APA 6th Edition

Skelin, D. (2011). Mjerenje profila brzine morskih struja akustičkom metodom (Scientific master's theses). Retrieved from https://urn.nsk.hr/urn:nbn:hr:168:345995

MLA 8th Edition

Skelin, Dražan. "Mjerenje profila brzine morskih struja akustičkom metodom." Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, 2011. https://urn.nsk.hr/urn:nbn:hr:168:345995

Chicago 17th Edition

Harvard

Skelin, D. (2011). 'Mjerenje profila brzine morskih struja akustičkom metodom', Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, accessed 23 October 2019, https://urn.nsk.hr/urn:nbn:hr:168:345995

Vancouver

Skelin D. Mjerenje profila brzine morskih struja akustičkom metodom [Scientific master's theses]. Zagreb: University of Zagreb, Faculty of Electrical Engineering and Computing; 2011 [cited 2019 October 23] Available at: https://urn.nsk.hr/urn:nbn:hr:168:345995

IEEE

D. Skelin, "Mjerenje profila brzine morskih struja akustičkom metodom", Scientific master's theses, University of Zagreb, Faculty of Electrical Engineering and Computing, Zagreb, 2011. Available at: https://urn.nsk.hr/urn:nbn:hr:168:345995

Cite this item: https://urn.nsk.hr/urn:nbn:hr:168:345995

Metadata

Title	Mjerenje profila brzine morskih struja akustičkom metodom
Title (english)	Measurement of the sea current velocity profiles by acoustic method
Author	Dražan Skelin
Mentor	Bojan Ivančević (mentor)
Committee member	Bojan Ivančević (predsjednik povjerenstva)
Granter	University of Zagreb Faculty of Electrical Engineering and Computing (Department of Electroacoustics) Zagreb
Defense date and country	2011-12-01, Croatia
Scientific / art field, discipline and subdiscipline	TECHNICAL SCIENCES Electrical Engineering
Universal decimal classification (UDC)	621.3 APPLIED SCIENCES. MEDICINE. TECHNOLOGY Electrical engineering
Abstract	Rad objašnjava potrebu za mjerenjem morskih struja, te prikazuje povijesni pregled i postojeće metode mjerenja. Objašnjeni su temeljni teorijski principi širenja zvuka u moru, te mjerenja profila brzine morskih struja akustičkom metodom, odnosno princip rada akustičkog mjerila profila brzine morskih struja (ADCP – Acoustic Doppler Current Profiler). Pobliže je objašnjen Dopplerov efekt i izračun radijalne brzine, odnosno trodimenzionalnog vektora brzine. Prikazani su osnovni principi uskopojasnih i širokopojasnih tehnika obrade reflektiranog signala. U posebnom poglavlju su opisane karakteristike HA pretvarača, te njihove međusobne konfiguracije pogodne za mjerenje morskih struja (prednosti i nedostaci konfiguracija sa tri ili četiri HA pretvarača). Također su prikazane praktične primjene akustičkog strujomjera, odnosno integracije sa drugim senzorima pri mjerenju morskih struja. Za potrebe rada provedeno je in situ mjerenje profila brzine morskih struja na dvije pozicije u Luci Kaprije s prostorno vertikalnom rezolucijom od 1 m i vremenskom rezolucijom od 10 minuta. Posebna pažnja je usmjerena na analizu i obradu mjernih podataka, odnosno načine prikaza obrađenih podataka (rezultata) mjerenja.
Abstract (english)	This thesis explains the need for sea current measurement and shows the history of the sea current measurements, as well as the present measurement methods. The basic theoretical principles of underwater sound propagation and measurement of the sea currents velocity profiles by the acoustic method are explained. Also the principle of operation of Acoustic Doppler Current Profiler (ADCP) is explained. The Doppler effect, radial velocity and three-dimensional vector are explained thoroughly. The basic principles of narrowband and broadband processing technices of Doppler shifted signal are explained. Charactheristics of the hydro-acoustic transducers and their configurations applicable for current measurement (advantages and disadvantages of three and four HA transducers) are explained in separate chapter. ADCP applications and integrations with other sensors are shown. For purpouse of this thesis in situ measurement of the sea current velocity profiles were conducted at the Luka Kaprije with vertical spatial resolution of 1 m and temporal resolution of 10 minutes. Special attention was given to data analysys and processing and presentation of measurement results.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:168:345995
Study programme	Title: Postgraduate master programme in electrical engineering Study programme type: university Study level: postgraduate Academic / professional title: Magistar znanosti elektrotehnike (Magistar znanosti elektrotehnike)
Catalog URL	http://lib.fer.hr/cgi-bin/koha/opac-detail.pl?biblionumber=37810
Type of resource	Text
Extent	117 str. ; 30 cm
File origin	Born digital
Access conditions	Closed access
Terms of use
Repository	FER Repository
Created on	2019-07-12 09:42:24