Search results for: PARAMETRIC SONAR

• Images of the Seabed of the Gulf of Gdansk Obtained by Means of the Parametric Sonar

  Publication

  • E. Kozaczka
  • G. Grelowska
  • S. Kozaczka

  - ACTA PHYSICA POLONICA A - Year 2010

  The main goal of this paper is to present results of the experimental investigation of the seabed by means of parametric echosounder in the form of chosen images. The phenomena of nonlinear interaction between two parallel beams of high intensity gives as a results very narrow beam of low frequency wave, that enables to penetrate the sea bottom. The first step of our investigations was calibration of all the elements of the measuring...

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• Parametro

  Journals

  ISSN: 0031-1731

• Acoustic imaging of selected areas of Gdansk Bay with the aid of parametric echosounder and side-scan sonar

  Publication

  • G. Grelowska
  • E. Kozaczka
  • W. Szymczak

  - Polish Maritime Research - Year 2017

  The article presents and analyses the data recorded during sounding of the Gdansk Bay seabed with the aid of a parametric echosounder and a side-scan sonar. The accuracy of seabed structure examination, as a condition for obtaining valuable results, requires correct configuration of echolocation devices and proper calibration of peripheral devices, such as the survey unit geographical position sensor – GPS, the navigation unit,...

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• SOLAR ENERGY MATERIALS AND SOLAR CELLS

  Journals

  ISSN: 0927-0248 , eISSN: 1879-3398

• SOLAR ENERGY

  Journals

  ISSN: 0038-092X

• Broadband Sonar with a Cylindrical Antenna

  Publication

  • R. Salamon
  • J. Marszal
  • W. Leśniak

  - ACTA ACUSTICA UNITED WITH ACUSTICA - Year 2006

  Skutkiem wzrostu szerokości widma sygnałów w sonarach z płaskimi antenami jest wzrost szerokości odchylanych wiązek, jeżeli beamformer dokonuje kompensacji faz tylko na częstotliwości środkowej widma. W artykule przedstawiono wyniki obliczeń, które odpowiadają na pytanie, czy podobny efekt występuje w szerokopasmowych sonarach z anteną cylindryczną. Obliczenia przeprowadzono dla anten nadawczych o szerokich wiązkach i anten odbiorczych...

• Passive sonar with cylindrical array

  Publication

  • J. Marszal
  • W. Leśniak
  • R. Salamon
  • A. Jedel
  • K. Zachariasz

  - Archives of Acoustics - Year 2006

  Artykuł prezentuje sposób wykorzystania sonaru aktywnego z anteną cylindryczną do nasłuchu pasywnego podwodnych źródeł dźwięku. Wykazano, że wykrycie źródła dźwięku i określenie jego namiaru może być zrealizowane bez zmian konstrukcji odbiornika. Wymagana jest jedynie zmiana algorytmów przetwarzania sygnałów w beamformerze. Wykazano również, że w celu zwiększenia dokładności namiaru można zastosować wysokorozdzielcze metody estymacji...

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• Radar and Sonar Imaging and Processing

  Publication

  • A. Stateczny
  • W. Kazimierski
  • K. Kulpa

  - Remote Sensing - Year 2020

  The 21 papers (from 61 submitted) published in the Special Issue “Radar and Sonar Imaging Processing” highlighted a variety of topics related to remote sensing with radar and sonar sensors. The sequence of articles included in the SI dealt with a broad profile of aspects of the use of radar and sonar images in line with the latest scientific trends. The latest developments in science, including artificial intelligence, were used.

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• Silent Sonar with matched filtration

  Publication

  • R. Salamon
  • J. Marszal
  • J. Schmidt
  • M. Rudnicki

  - HYDROACOUSTICS - Year 2011

  Radars with continuous wave frequency (CW FM sonars) are used in radiolocation as 'silent sonars'. They determine the distance to target by measuring the difference between the frequency of the sounding signal and echo signal. The article presents the principle of operation and parameters of silent CW FM sonars. Target distance determined by these sonars is based on the signal at the output of the matched filter. The Doppler effect...

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• Multifrequency Wideband Sonar Array

  Publication

  • A. Eliminowicz
  • W. Lis
  • L. Zajączkowski

  - HYDROACOUSTICS - Year 2012

  This paper describes of new approach to Multifrequency Wideband Arrays (MWA),applied piezocomposite technologies of the array elements. MWA operating in transmitting(Tx) and receiving (Rx) mode on two or three bands, requires state-of-the-art technology andefficient array designing than conventional array in which separate arrays for every band oreven separate Tx and Rx transducers/arrays are used. The new piezocomposite elements...

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