A CYLINDRICAL PARABOLIC REFLECTOR FOR USE WITH PIEZOELECTRIC CYLINDRICAL TRANSDUCERS, AS APPLIED TO LATERAL ECHO UNDERWATER SURVEY

Abstract

A parabolic lead reflector designed for creating a narrow sound beam at an underwater frequency of 30.5 kHz from an array of cylindrical ceramic piezoelectric crystals is described. The reflector consists of sheet lead 1/4- in. thick, backed by an aluminum stiffener sheet, 1/8-in. thick. Brackets for supporting the cylindrical crystal assembly are positioned at three points along the focal axis of the reflector. Clamping brackets for holding the cylindrical transducer are used to secure the transducer to the mounting brackets along the reflector axis. The cylindrical transducer assembly consists of 18 ceramic, lead zirconate cylinders, 1-1/2 in. O.D. and 2-1/2 in. long. The cylinders are cemented end to end to form a single, long, cylinder transducer. The oil reservoir maintains pressure balance in the transducer as the transducer is raised or lowered or varies in depth during submerged towing.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1968
Accession Number
AD0680244

Entities

People

  • F. W. Cole

Organizations

  • Columbia University

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • California
  • Department Of Defense
  • Geography
  • Massachusetts
  • Military Research
  • Naval Operations
  • Navy
  • New York
  • Oil Reservoirs
  • Pennsylvania
  • Reservoirs
  • Rhode Island
  • Sonar
  • Test And Evaluation
  • United States
  • United States Government
  • Virginia

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Materials Science and Engineering.
  • Structural Dynamics.

Technology Areas

  • Directed Energy