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Longitudinally Composite Ultrasonic Solid Conical Horns with Adjustable Vibrational Performance

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Longitudinally composite ultrasonic solid conical horns with adjustable vibrational performance are proposed and studied. Compared with the traditional ultrasonic horn, the composite conical horn presented is characterized by the insertion of piezoelectric material which is connected to adjustable electric impedance. Based on piezoelectric effect, when the electric impedance is changed, the vibrational performance of the horn can be adjusted. In this research, the effect of the electric impedance, the location and thickness of the piezoelectric material on the resonance frequency and the longitudinal displacement magnification is studied. It is shown that the displacement magnification of the horn with the PZT material located at the large end of the conical cylinder is larger than that with the PZT material located at the small end. When the electric impedance is increased, the resonance frequency is increased; the displacement magnification with the PZT material located at the large end is increased; the displacement magnification with the PZT material located at the small end has a minimum value. When the thickness of PZT material located at the large end is increased, the resonance frequency is decreased; the mechanical displacement magnification is increased. When the thickness of PZT material located at the small end is increased, the resonance frequency is decreased and the mechanical displacement magnification is also decreased. Based on the theoretical analysis, some composite conical horns are designed and manufactured; the resonance frequency and displacement magnification are measured by Polytec Doppler Laser Scanning vibrometer. It is shown that the theoretical resonance frequency and displacement magnification are in good agreement with the experimental results. It is concluded that by means of the insertion of the piezoelectric material, the vibrational performance of the horns can be adjusted by changing the electric impedance, the location and thickness of the piezoelectric material. It is expected that this kind of adjustable ultrasonic horn can be used in traditional and potential ultrasonic technologies where the vibrational performance adjustment is needed.
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Document Type: Research Article

Publication date: 01 January 2018

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  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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