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Time reversal ultrasound focusing through multimode waveguides

Ultraschall-Fokussierung durch Multimode-Wellenleiter mittels Zeitumkehrtechnik
  • David Dawidowski

    David Dawidowski is scholar of ArcelorMittal Eisenhüttenstadt GmbH and studied electrical engineering at Brandenburg University of Technology. In 2014 he received his Bachelor of Engineering and has been awarded with the Heinz Ludwig Horney Prize for his bachelor thesis, which he has written at Kajaani VTT Technical Research Centre of Finland. Currently he is studying electrical engineering (Master of Science) at the TU Dresden and develops a new ultrasound measurement technique at the Laboratory for Measurement and Sensor System Techniques. The work presented here is part of his master thesis.

    Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

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    , Richard Nauber

    Richard Nauber studied mechatronics at TU Dresden and is a research assistant at the Laboratory for Measurement and Sensor System Techniques at TU Dresden. His main research interests are in development and application of ultrasound-based flow instrumentation. Richard Nauber has received the UBERTONE Student Paper Award at September 21, 2012.

    Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

    , Lars Büttner

    Lars Büttner studied physics at Clausthal University of Technology and worked subsequently as a research assistant at the Laser Zentrum Hannover e. V. He received his doctoral degree from Leibniz University of Hannover in 2004. Since 2005, he is senior scientific assistant and head of the flow measurement technology group at the Laboratory for Measurement and Sensor System Techniques at TU Dresden. He has been awarded a Berthold Leibinger Innovation Prize in 2008. In cooperation with a company, he has transferred a high-resolution laser flow sensor to the market. His research activities focus on the development of novel measurement techniques using laser and ultrasound technology.

    Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

    and Jürgen Czarske

    Jürgen Czarske (Fellow EOS, OSA, SPIE and Senior IEEE) holds a Ph.D. from Leibniz University Hannover. His awards include a Precision Measurement Award of MST 2015, an ASME Best Paper Award 2011, a Berthold Leibinger Innovation Prize 2008 and the Measurement Technique Prize of AHMT 1996. Jürgen Czarske has held positions at Siemens AG (Munich) and LZH (private research institute, Hannover), where he was head of the department of measurement technique. From 1996 until 2001 he was temporally visiting scholar in Japan and USA. In 2003 he has earned his venia legendi. In 2004 he was appointed Chair Professor and Head of the Laboratory of Measurement and Sensor System Technique, TU Dresden, Germany. In 2014 he has won a Reinhart Koselleck award of DFG for highly innovative research. In 2016 he was appointed Director of the Institute of Fundamentals of Electrical Engineering and Electronics. He has published over 150 peer-reviewed journal papers and has transferred several patents to industry.

    Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

From the journal tm - Technisches Messen

Abstract

Ultrasound imaging in harsh environments, such as the continuous steel casting process, benefits from a spatial separation of sensors and measuring volume to avoid damaging e.g. because of high temperatures. This can be achieved through acoustical multimode waveguides. To focus ultrasound in the measuring volume despite the complex sound propagation, we propose using the time reversal technique. We present numerical simulations and experiments using the phased array ultrasound Doppler velocimeter to focus through a water filled waveguide with a 64 element array. A resolution in the millimetre range is achieved for a 68 mm long waveguide.

Zusammenfassung

Für bildgebende Ultraschallmesstechniken in harschen Messumgebungen ist es von Vorteil, Messinstrumente und Messumgebungen räumlich zu trennen. Hierdurch werden Beschädigungen an den Messinstrumenten vermieden, die z. B. bei hohen Temperaturen auftreten würden. Für die räumliche Trennung können akustische Multimode-Wellenleiter eingesetzt werden. Um Ultraschall durch Multimode-Wellenleiter in das Messvolumen zu führen und dort trotz der komplexen Ausbreitungsmoden zu fokussieren, schlagen wir die Verwendung der Zeitumkehrtechnik vor. Wir präsentieren das Phased Array Ultraschall Doppler Velozimeter sowie dessen Verwendung in numerischen Simulationen und Experimenten. Hierbei wird Ultraschall mit einem 64 Elemente Array durch einen wassergefüllten Wellenleiter fokussiert. Für einen 68 mm langen Wellenleiter wird eine Auflösung im Millimeter Bereich erzielt.

About the authors

David Dawidowski

David Dawidowski is scholar of ArcelorMittal Eisenhüttenstadt GmbH and studied electrical engineering at Brandenburg University of Technology. In 2014 he received his Bachelor of Engineering and has been awarded with the Heinz Ludwig Horney Prize for his bachelor thesis, which he has written at Kajaani VTT Technical Research Centre of Finland. Currently he is studying electrical engineering (Master of Science) at the TU Dresden and develops a new ultrasound measurement technique at the Laboratory for Measurement and Sensor System Techniques. The work presented here is part of his master thesis.

Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

Richard Nauber

Richard Nauber studied mechatronics at TU Dresden and is a research assistant at the Laboratory for Measurement and Sensor System Techniques at TU Dresden. His main research interests are in development and application of ultrasound-based flow instrumentation. Richard Nauber has received the UBERTONE Student Paper Award at September 21, 2012.

Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

Lars Büttner

Lars Büttner studied physics at Clausthal University of Technology and worked subsequently as a research assistant at the Laser Zentrum Hannover e. V. He received his doctoral degree from Leibniz University of Hannover in 2004. Since 2005, he is senior scientific assistant and head of the flow measurement technology group at the Laboratory for Measurement and Sensor System Techniques at TU Dresden. He has been awarded a Berthold Leibinger Innovation Prize in 2008. In cooperation with a company, he has transferred a high-resolution laser flow sensor to the market. His research activities focus on the development of novel measurement techniques using laser and ultrasound technology.

Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

Jürgen Czarske

Jürgen Czarske (Fellow EOS, OSA, SPIE and Senior IEEE) holds a Ph.D. from Leibniz University Hannover. His awards include a Precision Measurement Award of MST 2015, an ASME Best Paper Award 2011, a Berthold Leibinger Innovation Prize 2008 and the Measurement Technique Prize of AHMT 1996. Jürgen Czarske has held positions at Siemens AG (Munich) and LZH (private research institute, Hannover), where he was head of the department of measurement technique. From 1996 until 2001 he was temporally visiting scholar in Japan and USA. In 2003 he has earned his venia legendi. In 2004 he was appointed Chair Professor and Head of the Laboratory of Measurement and Sensor System Technique, TU Dresden, Germany. In 2014 he has won a Reinhart Koselleck award of DFG for highly innovative research. In 2016 he was appointed Director of the Institute of Fundamentals of Electrical Engineering and Electronics. He has published over 150 peer-reviewed journal papers and has transferred several patents to industry.

Fakultät Elektrotechnik und Informationstechnik, Professur für Mess- und Sensorsystemtechnik, TU Dresden, Helmholtzstr. 18, 01069 Dresden, Saxony, Germany

Acknowledgement

We thank Kevin Mäder and Hannes Beyer for their indispensable work on the modular phased array system technique. Partial funding by the German Research Foundation (DFG, grand BU 2241/2-1) is gratefully acknowledged.

Received: 2016-11-24
Revised: 2017-2-5
Accepted: 2017-2-5
Published Online: 2017-2-24
Published in Print: 2017-9-26

©2017 Walter de Gruyter Berlin/Boston

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