Pipe organ air-coupled broad bandwidth transducer

B. Zhu, B. Tiller, J.F.C. Windmill, A.J. Mulholland, A.J. Walker

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Abstract

Air-coupled transducers are used to conduct fast non-contact inspections in NDT. Normally, the bandwidth of a conventional transducer can be enhanced, but with a cost to its sensitivity. However, low sensitivity is very disadvantageous in air-coupled devices. This paper presents a methodology for improving the bandwidth of an air-coupled micro-machined ultrasonic transducer (MUT) without sensitivity loss by connecting a number of resonating pipes of various length to a cavity in the backplate. The design is inspired by the pipe organ musical instrument, where the resonant frequency (pitch) of each pipe is mainly determined by its length.
Original languageEnglish
Number of pages4
Publication statusPublished - 6 Sep 2017
Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
Duration: 6 Sep 20179 Sep 2017
http://ewh.ieee.org/conf/ius/2017/

Conference

Conference2017 IEEE International Ultrasonics Symposium, IUS 2017
Abbreviated titleIEEE IUS 2017
CountryUnited States
CityWashington
Period6/09/179/09/17
Internet address

Keywords

  • air-coupled
  • broad bandwith
  • 3D print
  • NDT/E
  • ultrasonic transducer
  • MUT

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    Zhu, B., Tiller, B., Windmill, J. F. C., Mulholland, A. J., & Walker, A. J. (2017). Pipe organ air-coupled broad bandwidth transducer. Paper presented at 2017 IEEE International Ultrasonics Symposium, IUS 2017, Washington, United States.