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Direct Visualization of High-Intensity Focused Ultrasonic Field Using Light-Emitting Diodes and Piezoelectric Elements

  • K. Nakamura
  • H. Ogura
  • T. Sugimoto
Part of the Acoustical Imaging book series (ACIM, volume 29)

Abstract

This paper presents a tool with a light-emitting diode (LED) connected to a piezoelectric ceramic element for directly visualizing an intense ultrasonic field. The piezoelectric element generates electric voltage proportional to the ultrasonic pressure applied to the element; the LED is then turned on by the voltage. The sound pressure is directly observed as light intensity of the LED by human eyes. This paper first explains the basic structure of the sensor device. Several methods to utilize the sensor are then presented. Second, visualization of a focused field excited by a concave transducer working at 500kHz is demonstrated using an array version of the proposed sensor.

Key words

Visualization LED Piezoelectric ceramics PZT Focused ultrasonic field Array Concave transducer 

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References

  1. 1.
    K. Nakamura and T. Sugimoto, Measurements of ultrasonic field using a piezoelectric-ceramics and a light emitting diode, Trans IEICE, J86-C(12), 1331–1336 (2003).Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • K. Nakamura
    • 1
    • 2
  • H. Ogura
    • 1
    • 2
  • T. Sugimoto
    • 1
    • 2
  1. 1.Precision and Intelligence LaboratoryTokyo Institute of TechnologyYokohamaJapan
  2. 2.Faculty of EngineeringToin University of YokohamaYokohamaJapan

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