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Title: Acoustic transducer with damping means

Abstract

An ultrasonic transducer specifically suited to high temperature sodium applications is described. A piezoelectric active element is joined to the transducer faceplate by coating the faceplate and juxtaposed active element face with wetting agents specifically compatible with the bonding procedure employed to achieve the joint. The opposite face of the active element is fitted with a backing member designed to assure continued electrical continuity during adverse operating conditions which can result in the fracturing of the active element. The fit is achieved employing a spring-loaded electrode operably arranged to electrically couple the internal transducer components, enclosed in a hermetically sealed housing, to accessory components normally employed in transducer applications. Two alternative backing members are taught for assuring electrical continuity. The first employs a resilient, discrete multipoint contact electrode in electrical communication with the active element face. The second employs a resilient, elastomeric, electrically conductive, damped member in electrical communication with the active element face in a manner to effect ring-down of the transducer. Each embodiment provides continued electrical continuity within the transducer in the event the active element fractures, while the second provides the added benefit of damping.

Inventors:
 [1];  [1]
  1. Richland, WA
Issue Date:
Research Org.:
Hanford Engineering Development Lab., Richland, WA (United States)
OSTI Identifier:
862693
Patent Number(s):
3989965
Application Number:
05/383,202
Assignee:
Westinghouse Electric Corporation (Pittsburgh, PA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL B06B - METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL
H - ELECTRICITY H04 - ELECTRIC COMMUNICATION TECHNIQUE H04R - LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS
DOE Contract Number:  
AT(45-1)-2170
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
acoustic; transducer; damping; means; ultrasonic; specifically; suited; temperature; sodium; applications; described; piezoelectric; active; element; joined; faceplate; coating; juxtaposed; wetting; agents; compatible; bonding; procedure; employed; achieve; joint; opposite; fitted; designed; assure; continued; electrical; continuity; adverse; operating; conditions; result; fracturing; fit; achieved; employing; spring-loaded; electrode; operably; arranged; electrically; couple; internal; components; enclosed; hermetically; sealed; housing; accessory; normally; alternative; taught; assuring; employs; resilient; discrete; multipoint; contact; communication; elastomeric; conductive; damped; manner; effect; ring-down; embodiment; provides; event; fractures; added; benefit; electrical continuity; acoustic transducer; operating conditions; hermetically sealed; ultrasonic transducer; electrically conductive; operating condition; sealed housing; wetting agent; active element; temperature sodium; normally employed; electrical communication; embodiment provides; hermetically seal; damping means; /310/367/

Citation Formats

Smith, Richard W, and Adamson, Gerald E. Acoustic transducer with damping means. United States: N. p., 1976. Web.
Smith, Richard W, & Adamson, Gerald E. Acoustic transducer with damping means. United States.
Smith, Richard W, and Adamson, Gerald E. Tue . "Acoustic transducer with damping means". United States. https://www.osti.gov/servlets/purl/862693.
@article{osti_862693,
title = {Acoustic transducer with damping means},
author = {Smith, Richard W and Adamson, Gerald E},
abstractNote = {An ultrasonic transducer specifically suited to high temperature sodium applications is described. A piezoelectric active element is joined to the transducer faceplate by coating the faceplate and juxtaposed active element face with wetting agents specifically compatible with the bonding procedure employed to achieve the joint. The opposite face of the active element is fitted with a backing member designed to assure continued electrical continuity during adverse operating conditions which can result in the fracturing of the active element. The fit is achieved employing a spring-loaded electrode operably arranged to electrically couple the internal transducer components, enclosed in a hermetically sealed housing, to accessory components normally employed in transducer applications. Two alternative backing members are taught for assuring electrical continuity. The first employs a resilient, discrete multipoint contact electrode in electrical communication with the active element face. The second employs a resilient, elastomeric, electrically conductive, damped member in electrical communication with the active element face in a manner to effect ring-down of the transducer. Each embodiment provides continued electrical continuity within the transducer in the event the active element fractures, while the second provides the added benefit of damping.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {11}
}

Patent:

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