On-axis ultrasonic field characteristics of monopole pulse radiated from planar and concave transducers

Kouji Takasaki, Kazuhiko Imano, Hiroshi Inoue

    Research output: Contribution to journalConference articlepeer-review

    1 Citation (Scopus)

    Abstract

    Monopole ultrasonic pulses having different pulse widths are generated from the piezo-ceramic planar and concave circular transducers using the cycloid function voltages with different rise time as an exciting voltage. The on-axis pressure characteristics of the monopole ultrasonic pulse are observed. As the experimental results, the monopole ultrasonic pulse radiated from a planar transducer is changed to the bipolar pulse by the interference between direct wave and edge wave. The limit of distance for near field of the monopole ultrasonic pulse varies with the pulse width. In case of the concave transducer, the main cause of the change from monopole ultrasonic pulse to bipolar one around the focus is estimated by the diffraction effect of direct wave. The position of the maximum amplitude of the on-axis pressure moved from the center of the curvature with the difference of the pulse widths is also observed.

    Original languageEnglish
    Pages (from-to)1039-1042
    Number of pages4
    JournalProceedings of the IEEE Ultrasonics Symposium
    Volume2
    Publication statusPublished - 1998 Dec 1
    EventProceedings of the 1998 International Ultrasonics Symposium - Sendai, Miyagi, Jpn
    Duration: 1998 Oct 51998 Oct 8

    ASJC Scopus subject areas

    • Acoustics and Ultrasonics

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