CA2109466A1 - Method and transducers for transmitting low frequency acoustic waves in a liquid - Google Patents

Method and transducers for transmitting low frequency acoustic waves in a liquid

Info

Publication number
CA2109466A1
CA2109466A1 CA 2109466 CA2109466A CA2109466A1 CA 2109466 A1 CA2109466 A1 CA 2109466A1 CA 2109466 CA2109466 CA 2109466 CA 2109466 A CA2109466 A CA 2109466A CA 2109466 A1 CA2109466 A1 CA 2109466A1
Authority
CA
Canada
Prior art keywords
housing
liquid
low frequency
acoustic waves
motors
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA 2109466
Other languages
French (fr)
Other versions
CA2109466C (en
Inventor
Didier Boucher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Direction General pour lArmement DGA
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2109466A1 publication Critical patent/CA2109466A1/en
Application granted granted Critical
Publication of CA2109466C publication Critical patent/CA2109466C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • 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
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
    • B06B1/0611—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile
    • B06B1/0618—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile of piezo- and non-piezoelectric elements, e.g. 'Tonpilz'

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

Transducteur, pour émettre des ondes acoustiques basse fréquence, comportant deux moteurs électro-acoustiques alignés sur un axe, placés de part et d'autre d'une contremasse centrale et coaxialement à l'intérieur d'un boîtier cylindrique creux, recouvrant l'ensemble desdits moteurs jusqu'aux pavillons d'extrémité de ceux-ci et rempli dudit liquide. Ledit boîtier est en matériau résistant à la pression et élastique, et comporte une ouverture périphérique circulaire au voisinage de son plan médian; les dimensions de celle-ci, ainsi que les caractéristiques dudit boîtier sont déterminées telles que par couplage de l'élasticité du boîtier avec la masse de liquide située dans ladite ouverture, la fréquence d'Helmholtz de la cavité déterminée par le boîtier est voisine de la fréquence fondamentale des vibrations axiales de l'ensemble constitué par lesdits moteurs électro-acoustiques, ladite contre-masse et lesdits pavillons.Transducer, for emitting low frequency acoustic waves, comprising two electro-acoustic motors aligned on an axis, placed on either side of a central countermass and coaxially inside a hollow cylindrical case, covering the assembly from said motors to the end pavilions thereof and filled with said liquid. Said housing is of pressure-resistant and elastic material, and has a circular peripheral opening in the vicinity of its median plane; the dimensions of the latter, as well as the characteristics of said housing are determined such that by coupling the elasticity of the housing with the mass of liquid located in said opening, the Helmholtz frequency of the cavity determined by the housing is close to the fundamental frequency of the axial vibrations of the assembly constituted by said electro-acoustic motors, said counter-mass and said pavilions.

CA 2109466 1992-11-05 1993-10-28 Method and transducers for transmitting low frequency acoustic waves in a liquid Expired - Fee Related CA2109466C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9213303A FR2697711B1 (en) 1992-11-05 1992-11-05 Method and transducer for emitting low frequency acoustic waves in a liquid in unlimited immersion.
FR9213303 1992-11-05

Publications (2)

Publication Number Publication Date
CA2109466A1 true CA2109466A1 (en) 1994-05-06
CA2109466C CA2109466C (en) 2002-01-22

Family

ID=9435246

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2109466 Expired - Fee Related CA2109466C (en) 1992-11-05 1993-10-28 Method and transducers for transmitting low frequency acoustic waves in a liquid

Country Status (5)

Country Link
EP (1) EP0596763B1 (en)
CA (1) CA2109466C (en)
DE (1) DE69300365T2 (en)
ES (1) ES2078810T3 (en)
FR (1) FR2697711B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5636183A (en) * 1995-02-23 1997-06-03 Etat Francais As Represented By The Delegue General Pour L'armement Process and transducers submerged in a fluid for emitting low frequency acoustic waves with lightened horns

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720589B1 (en) * 1994-05-27 1996-07-05 France Etat Armement Method and transducer for emitting wideband and low frequency acoustic waves in unlimited immersion depth.
CN116532349B (en) * 2023-06-07 2024-01-30 中国科学院声学研究所 Composite driving Helmholtz transducer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2361033A1 (en) * 1976-08-03 1978-03-03 France Etat PIEZOELECTRIC TRANSDUCERS AND HIGH DEPTH SUBMERSIBLE ACOUSTICAL ANTENNAS
FR2665998B1 (en) * 1988-05-05 1993-10-29 Etat Francais Delegue Armement ELECTRO-ACOUSTIC TRANSDUCERS AND METHODS FOR TRANSMITTING LOW FREQUENCY ACOUSTIC WAVES INTO A LIQUID.
FR2634292B1 (en) * 1988-07-15 1990-10-19 Grosso Gilles METHOD AND DEVICES FOR MAINTAINING THE GAS CONTAINED IN A SUBMERSIBLE PRESSURE BALANCED ENCLOSURE WITH THE OUTSIDE
FR2663182B1 (en) * 1990-06-12 1992-09-18 Grosso Gilles UNDERWATER ELECTRO-ACOUSTIC TRANSDUCER.
FR2665814B1 (en) * 1990-08-10 1993-06-11 Thomson Csf ELECTROACOUSTIC TRANSDUCER INTENDED TO BE UNDERWATER AND INCLUDING A SYSTEM FOR AUTOMATIC COMPENSATING FOR IMMERSION PRESSURE.
FR2673347B1 (en) * 1991-02-22 1993-05-07 Thomson Csf ELECTROACOUSTIC TRANSDUCER WITH OPTIMIZED ACOUSTIC DECOUPLING.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5636183A (en) * 1995-02-23 1997-06-03 Etat Francais As Represented By The Delegue General Pour L'armement Process and transducers submerged in a fluid for emitting low frequency acoustic waves with lightened horns

Also Published As

Publication number Publication date
DE69300365D1 (en) 1995-09-14
EP0596763B1 (en) 1995-08-09
CA2109466C (en) 2002-01-22
DE69300365T2 (en) 1996-04-04
FR2697711B1 (en) 1994-12-30
ES2078810T3 (en) 1995-12-16
EP0596763A1 (en) 1994-05-11
FR2697711A1 (en) 1994-05-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed