A PIEZOELECTRIC ACTUATOR, BASED ON A LANGEVIN-TYPE TRANSDUCER, FOR DERMATOLOGICAL AESTHETIC APPLICATIONS

Nicola Lamberti

Abstract

In dermatological aesthetic piezoelectric actuators are widely used: the skin treatment is obtained by the bending vibration, along the length, of a steel foil with a thickness of about 0.5 mm; the vibration frequency is in the ultrasonic range, to avoid annoying noise. In this paper a piezoelectric actuator able to excite a bending motion in the steel foil is described; the active part of the actuator is a piezoelectric Langevin–type transducer soliciting the foil at one edge. The actuator was designed by using ANSYS with the objective to obtain a system with high efficiency, low losses, high mechanical stiffness and low encumbrance. Best results were obtained by means of a Langevin actuator with a stepped horn displacement amplifier, whose total length is λ/2 at the resonance frequency; the Langevin is connected to the foil by an ad hoc support. The ANSYS results computed in operating conditions show a well sustained bending vibration of the foil with stress values, in all the actuator components, far from the limit value in the material.

References

  1. Langevin P., French Patent n. 503913 (29/5/1929), n. 505703 (5/8/1920), n. 575435 (30/7/1924).
  2. Zelenka J., 1986. Piezoeletric resonator and their applications, Elsevier, New York.
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  5. Lamberti N., Casacchia G., Ardia L., Caputo A., 2008, Actuator with interchangeable bending-vibrating foils, based on a langevin-type transducer, International Patent, PCT/IT2008/000431.
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Paper Citation


in Harvard Style

Lamberti N. (2011). A PIEZOELECTRIC ACTUATOR, BASED ON A LANGEVIN-TYPE TRANSDUCER, FOR DERMATOLOGICAL AESTHETIC APPLICATIONS . In Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2011) ISBN 978-989-8425-37-9, pages 163-167. DOI: 10.5220/0003136701630167


in Bibtex Style

@conference{biodevices11,
author={Nicola Lamberti},
title={A PIEZOELECTRIC ACTUATOR, BASED ON A LANGEVIN-TYPE TRANSDUCER, FOR DERMATOLOGICAL AESTHETIC APPLICATIONS},
booktitle={Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2011)},
year={2011},
pages={163-167},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0003136701630167},
isbn={978-989-8425-37-9},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Biomedical Electronics and Devices - Volume 1: BIODEVICES, (BIOSTEC 2011)
TI - A PIEZOELECTRIC ACTUATOR, BASED ON A LANGEVIN-TYPE TRANSDUCER, FOR DERMATOLOGICAL AESTHETIC APPLICATIONS
SN - 978-989-8425-37-9
AU - Lamberti N.
PY - 2011
SP - 163
EP - 167
DO - 10.5220/0003136701630167