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M. Sc. Bastian Kaulen

Room D-019
Kaiserstraße 2, 24143 Kiel, Germany
Phone: +49 431 880-6132
Telefax: +49 431 880-6128
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

Research: Real-time Signal Processing for Piezoelectric Thin-layer Sensors

In current systems for localization of underwater objects often one transmitting and multiple receiving elements are used to achieve a certain directivity for detection. Conventional piezoelectric ceramics receiving elements are generally large and expensive. During the last years the new piezoelectric thin-layer sensors, developed in collaborative research groups at Kiel University, allow an increased sensor density due to their low cost and their smaller installation space.

One possible application is the installation in a towed sonar. However, the speed of the towing process is limited by the occurrence of disturbances due to the passing water. These disturbances increase exponentially with speed. The cost and space savings of the novel hydrophones not only allow a more precise characterization of the signal degradation due to movement in the water, but could also be used to estimate the occurring disturbances more accurate and thus select less disturbed sensors.

The challenging part arises, because these sensors also record mechanical vibrations, whereby the desired signals are superimposed by unwanted signal components. To reduce this coupling effect and increase the usability of such sensors in measurement environments signal processing techniques are applied. With the help of a temporal-spatial filtering the noise could be minimized directly. In addition to the construction of spatially highly sampled arrays, the equalization of the individual sensors is also important. The sensitivity of the sensors differs depending on the frequency range and can be adjusted by an adapted signal processing.

Related topics:

  • Hydroacoustics
  • Flow noise cancellation and suppression
  • Signal combination
  • Hardware design

 

Further interests:

  • Real-time digital signal processing
  • Array design
  • Channel / environment simulation

 

Short CV

 
 
Time span   Details  
  2019 - current   Research assistant at the Christian-Albrechts-Universität zu Kiel, Kiel, Germany  
  2017 - 2018   M.Sc. in Electrical and Information Engineering at the Christian-Albrechts-Universität zu Kiel, Kiel, Germany  
  2016 - 2017   Internship (R&D) at Dräger Safety AG & Co. KGaA, Lübeck, Germany  
  2012 - 2017   B.Sc. in Electrical Engineering and Business Administration at the Christian-Albrechts-Universität zu Kiel, Kiel, Germany  

 

Publications

  1.    

    B. Kaulen, A. Namenas, G. Schmidt: Entwurf und Implementierung einer kognitiven Steuereinheit für ein Echtzeit-MIMO-SONAR-System, Proc. DAGA, Germany, 2019

  2.    

    T. Hübschen, B. Kaulen, M. Yurdakul, G. Schmidt: Sprachqualität in drahtlosen Ad-Hoc-Netzwerken, Proc. DAGA, Germany, 2019

  3.    

    T. Hübschen, M. Gimm, B. Kaulen, G. Mittag, S. Möller, G. Schmidt: Echtzeit-Rahmenwerk zur Unterstützung der Evaluierung von Sprachkommunikationssystemen, Proc. DAGA 2018 (online access)