A Polyvinylidene Fluoride Differential Membrane Pressure Acoustical Transducer.

Abstract

This work describes an ultrasonic acoustical transducer used to generate and receive ultrasonic waves. Transducer construction includes a membrane of polyvinylidene fluoride (PVDF), a piezoelectric polymer, which is deflected by liquid or gas pressure to form a concave or convex surface. When an RF signal is applied to the membrane transducer ultrasonic waves are generated. Calculations for the performance of the transducer are given along with the results of a series of ten tests. A 1.27 cm diameter transducer was constructed for this study. Results indicate that, although the acoustical power output of the device is lower than conventional transducers, the lower construction costs and variable focal length capability may make it ideal for fabrication into large transducer arrays. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 28, 1979
Accession Number
ADA082025

Entities

People

  • John A. Schaeffel Jr.

Organizations

  • United States Army Aviation and Missile Command

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Control Systems
  • Electric Fields
  • Electrode Holders
  • Electrodes
  • Fabrication
  • Films
  • Frequency
  • Information Processing
  • Jet Propulsion
  • Materials
  • Modulus Of Elasticity
  • Piezoelectric Effect
  • Piezoelectric Materials
  • Piezoelectric Polymers
  • Pressure Transducers
  • Test And Evaluation
  • Ultrasounds

Readers

  • Graph Algorithms and Convex Optimization.
  • Materials Science and Engineering.
  • Pulsed Power and Plasma Physics.