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1
Content available Badanie struktury dna Zatoki Gdańskiej metodą akustyki nieliniowej
100%
Kozaczka S.
Zeszyty Naukowe Akademii Marynarki Wojennej
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2012
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tom R. 53 nr 1 (188)
97-106
PL
W pracy przedstawiono wyniki badań doświadczalnych i symulacyjnych, których celem jest wyznaczenie parametrów warstwowej struktury dna morskiego. W badaniach empirycznych zastosowano nieinwazyjną metodę sondowania wykorzystującą echosondę parametryczną SES-2000 Standard. Badania te przeprowadzono na akwenie Zatoki Gdańskiej. Wyniki sondowania porównano z danymi otrzymanymi z analizy odwiertów dokonanych przez wyspecjalizowane instytucje. Zwrócono uwagę na czynniki decydujące o dokładności pomiarów, a w szczególności na różne prędkości rozchodzenia się fali sondującej w zależności od rodzaju osadów dennych. Otrzymane wyniki są wstępem do opracowania pełnej procedury badania górnej warstwy dna morskiego wykorzystującej metody akustyki nieliniowej.
EN
The paper presents the results of experimental and simulation investigations, whose aim are to determine parameters of the sea bottom layered structure. The non-invasive sounding method employing SES-2000 parametric echo sounder was used to conduct empirical investigation. The investigations were conducted in the bay of Gdańsk. The results of the sounding were compared with the data obtained from the analyses of bore-holes made by specialized firms. Attention was paid to the factors responsible for the accuracy of measurement, especially to different speed values of propagation of the sounding wave dependent on the kind of bottom sediments.
2
Agritechnika 2009
100%
Kozaczka S.
Poradnik Gospodarski
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2010
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nr 01
8-9
3
Content available New methods of underwater ship noise classification
63%
Kozaczka E. , Kozaczka S.
Hydroacoustics
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2006
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tom Vol. 9
85-88
EN
The detection, classification, identification and recognition ships noise features have been of the highest importance for scientific and also defense interest. A big effort is made in the passive sonar technologies that allow applying underwater noise for practical purpose. Results are presented which demonstrate the ability of the network to classify man made sources as are underwater ships noise. The paper presents a method based mainly on neural network that is very helpful for classification of these types of sources on the way to recognizing them.
4
Wrazenia ze zwiedzania biogazowni rolniczej w Niemczech
63%
Grudzien-Kozaczka L. , Kozaczka S.
Poradnik Gospodarski
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2010
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nr 01
28-29
5
Historyczny przegląd rozwoju systemów akustyki podwodnej
63%
Grelowska G. , Kozaczka S.
Logistyka
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2015
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tom nr 4
1649--1652, CD2
PL
W artykule przedstawiono informacje o początkach hydroakustyki, gałęzi nauki i techniki niezastąpionej jako narzędzie eksploracji i eksploatacji mórz i oceanów. Zaprezentowano najważniejsze odkrycia naukowe, dzięki którym powstać mogły urządzenia i systemy hydroakustyczne, a także pierwsze doświadczenia i pierwsze systemy obserwacji podwodnej.
EN
The article presents information about the origins of hydroacoustics, branches of science and technology as a irreplaceable tool for exploration and exploitation of the seas and oceans. Paper presents major scientific discoveries in the field of hydroacoustic devices and systems, as well as first experiences and the first underwater observation systems.
6
Processing data on sea bottom structure obtained by means of the parametric sounding
51%
Kozaczka E. , Grelowska G. , Kozaczka S. , Szymczak W.
Polish Maritime Research
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2012
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tom 19
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nr 4
EN
The aim of the paper is to analyze data obtained during sounding the Gdansk Bay sea bed by means of the parametric echo-sounder. The accuracy of the sea bottom structure investigation needs correct configuration of research equipment and proper calibration of peripheral devices (GPS, heading sensor, MRU-Z motion sensor and navigation instruments which provide necessary data to bathymetrical measurement system, enabling its work with full capability. The parametric sub-bottom profiler delivers two types of data which include different information: envelope and pure echo signal sampled without processing. The first is used to present echograms in real time and the second one is stored during sounding and the obtained data can be analyzed by using post-processing software. Differences in the results are presented and discussed. And, are described also criteria taken into account during determination of the measurement areas and selection of different configurations of the software according to the information to be obtained from trials. Complementary information can be achieved from processing the data by means of the procedures offered by Matlab software, which allows for a clear 3D presentation of the results. The consideration are illustrated by echograms taken in the natural conditions
7
Content available Some methods of the sea bottom recognition
51%
Grelowska G. , Kozaczka S. , Szymczak W.
Hydroacoustics
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2009
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tom Vol. 12
69-76
EN
Sea bottom structure recognition nowadays is a matter of great interest due to huge spectrum of potential applications, such as a hydrography, military oceanography, marine geosciences, offshore industry, environmental protection and many others. For that reason a great variety of tools and techniques for sea bottom measurements and modeling is developed. However, each technique leads to specific bottom images and allows to determine only few characteristics of examined area. In the paper are presented experimental results collected in the Gdansk Gulf region obtained by means of three technique: wide side sonar, parametric sonar and multi-beam sonar.
8
Content available Underwater Noise Generated by a Small Ship in the Shallow Sea
51%
Grelowska G. , Kozaczka E. , Kozaczka S. , Szymczak W.
Archives of Acoustics
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2013
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tom Vol. 38, No. 3
351--356
EN
Study of the sea noise has been a subject of interest for many years. The first works in this scope were published at the turn of the twentieth century by Knudsen (Knudsen et al., 1948) and G. Wenz (Wenz, 1962). Disturbances called “shipping noise” are one of the important components of the sea noise. In this work the results of an experimental research of underwater noise produced by a small ship of a classic propulsion are presented. A linear receiving antenna composed of two orthogonal components was used in the investigation. Identification of the main sources of acoustic waves related with the ship was achieved. In addition, the intensity of the wave was measured. The research was performed in conditions of the shallow sea.
9
Content available Processing data on sea bottom structure obtained by means of the parametric sounding
51%
Kozaczka E. , Grelowska G. , Kozaczka S. , Szymczak W.
Polish Maritime Research
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2012
|
tom nr 4
3-10
EN
The aim of the paper is to analyze data obtained during sounding the Gdansk Bay sea bed by means of the parametric echo-sounder. The accuracy of the sea bottom structure investigation needs correct configuration of research equipment and proper calibration of peripheral devices (GPS, heading sensor, MRU-Z motion sensor and navigation instruments which provide necessary data to bathymetrical measurement system, enabling its work with full capability. The parametric sub-bottom profiler delivers two types of data which include different information: envelope and pure echo signal sampled without processing. The first is used to present echograms in real time and the second one is stored during sounding and the obtained data can be analyzed by using post-processing software. Differences in the results are presented and discussed. And, are described also criteria taken into account during determination of the measurement areas and selection of different configurations of the software according to the information to be obtained from trials. Complementary information can be achieved from processing the data by means of the procedures offered by Matlab software, which allows for a clear 3D presentation of the results. The consideration are illustrated by echograms taken in the natural conditions.
10
Gdansk Bay sea bed sounding and classification of its results
51%
Grelowska G. , Kozaczka E. , Kozaczka S. , Szymczak W.
Polish Maritime Research
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2013
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tom 20
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nr 3
EN
The main goal of this paper is to describe the results of sounding the Gdansk Bay sea bed by using a SES2000 Standard parametric sub-bottom profiler. Quality of data obtained during trials depends inter alia on a proper location of transducer array to reduce influence of pitch, roll and heave motions as well as ship self noise (resulting from bubbles due to propeller and flow around hull, vibration generated by main engine and auxiliary devices). Furthermore, calibration of complementary units such as GPS, heading sensor, MRU-Z motion sensor and navigation devices make sea-bed investigating system capable of working with its whole capability. Results of so prepared surveys have been presented and discussed. They contain also an elaborated map of Gdansk Bay with preliminarily classified sea-bed materials and description of most interesting areas
11
Content available Detection of Objects Buried in the Sea Bottom with the Use of Parametric Echosounder
51%
Kozaczka E. , Grelowska G. , Kozaczka S. , Szymczak W.
Archives of Acoustics
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2013
|
tom Vol. 38, No. 1
99--104
EN
The paper contains results of a in situ research main task of which was to detect objects buried, partially or completely, in the sea bottom. Object detecting technologies employing acoustic wave sources based on nonlinear interaction of elastic waves require application of parametric sound sources. Detection of objects buried in the sea bottom with the use of classic hydroacoustic devices such as the sidescan sonar or multibeam echosounder proves ineffective. Wave frequencies used in such devices are generally larger than tens of kHz. This results in the fact that almost the whole acoustic energy is reflected from the bottom. On the other hand, parametric echosounders radiate waves with low frequency and narrow beam patterns which ensure high spatial resolution and allows to penetrate the sea bottom to depths of the order of tens of meters. This allows to detect objects that can be interesting, among other things, from archaeological or military point of view.
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