Coded excitation for air-coupled ultrasound phased arrays

Riliang Su, David Lines, Yavor Arnaudov, Lei Kang, Axel Jäger, Han Wang, Sivaram Nishal Ramadas, Mario Kupnik, Steve Dixon

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

Coded excitation techniques have been widely used in radar and sonar for improved resolution and noise performance. Whilst becoming more common in medical ultrasound, only few industrial applications have been reported. We present some results from work looking at air-coupled phased arrays aiming at improved air flow speed measurements. The high insertion loss for air-coupled transducers means that coded excitation is desirable and needs to be investigated for arrays. Transducer sensitivity is often optimised at the expense of bandwidth, which can compromise the benefits of coded excitation and this relationship has been examined. The paper reports on the relative performance of Golay codes, and examines the trade-offs with transducer bandwidth.

Original languageEnglish
Publication statusPublished - 5 Sep 2017
Event56th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2017 - Telford, United Kingdom
Duration: 5 Sep 20177 Sep 2017

Conference

Conference56th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2017
CountryUnited Kingdom
CityTelford
Period5/09/177/09/17

Keywords

  • air-coupled phased array
  • coded excitation
  • flow measurement

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  • Cite this

    Su, R., Lines, D., Arnaudov, Y., Kang, L., Jäger, A., Wang, H., ... Dixon, S. (2017). Coded excitation for air-coupled ultrasound phased arrays. Paper presented at 56th Annual Conference of the British Institute of Non-Destructive Testing, NDT 2017, Telford, United Kingdom.