ATE306706T1 - TRANSDUCER WITH ADJUSTABLE RESONANCE FREQUENCY - Google Patents

TRANSDUCER WITH ADJUSTABLE RESONANCE FREQUENCY

Info

Publication number
ATE306706T1
ATE306706T1 AT01900485T AT01900485T ATE306706T1 AT E306706 T1 ATE306706 T1 AT E306706T1 AT 01900485 T AT01900485 T AT 01900485T AT 01900485 T AT01900485 T AT 01900485T AT E306706 T1 ATE306706 T1 AT E306706T1
Authority
AT
Austria
Prior art keywords
walls
projector
operable
transducing
tuning
Prior art date
Application number
AT01900485T
Other languages
German (de)
Inventor
Grant Smith
Original Assignee
Thales Underwater Systems Ltd
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 Thales Underwater Systems Ltd filed Critical Thales Underwater Systems Ltd
Application granted granted Critical
Publication of ATE306706T1 publication Critical patent/ATE306706T1/en

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
    • B06B1/0614—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 for generating several frequencies
    • 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
    • B06B1/0622—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 on one surface
    • B06B1/0633—Cylindrical array
    • 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
    • B06B1/08—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with magnetostriction
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators
    • G10K11/04—Acoustic filters ; Acoustic resonators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Holo Graphy (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

The invention provides a frequency tuneable projector (10, 100) comprising a cavity (106) at least partially surrounded by walls where at least one of the walls incorporates a transducing element (20a, 20d) and a tuning element (20b, 20c). The transducing element (20a, 20d) is operable to couple between electrical signals and corresponding mechanical vibrations of the walls. The tuning element (20b, 20c) is operable to provide an electrically modifiable stiffness for use in tuning a resonant frequency of the walls. The tuning element (20b, 20c) enables the projector to be tuned over a range of frequencies, thereby making it feasible for it to operate at resonance over the range of frequencies and thereby provide enhanced efficiency associated with operating at resonance. The walls are operable to vibrate in a bending mode or radial mode. The projector can be implemented as a vibrating cylindrical structure (400, 500) and can optionally incorporate end caps (430, 440), or be implemented as a circular structure (10, 100) incorporating one or more vibrating backing plates (16a, 16b) to which transducing and control elements (20a, 20b, 20c, 20d) are attached.
AT01900485T 2000-01-14 2001-01-08 TRANSDUCER WITH ADJUSTABLE RESONANCE FREQUENCY ATE306706T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0000703.9A GB0000703D0 (en) 2000-01-14 2000-01-14 Frequency tunable projector
PCT/GB2001/000054 WO2001052593A2 (en) 2000-01-14 2001-01-08 Projector with tunable resonance frequency

Publications (1)

Publication Number Publication Date
ATE306706T1 true ATE306706T1 (en) 2005-10-15

Family

ID=9883596

Family Applications (1)

Application Number Title Priority Date Filing Date
AT01900485T ATE306706T1 (en) 2000-01-14 2001-01-08 TRANSDUCER WITH ADJUSTABLE RESONANCE FREQUENCY

Country Status (7)

Country Link
EP (1) EP1282896B1 (en)
AT (1) ATE306706T1 (en)
AU (1) AU777563B2 (en)
DE (1) DE60113984T2 (en)
ES (1) ES2251457T3 (en)
GB (1) GB0000703D0 (en)
WO (1) WO2001052593A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2858819A1 (en) * 2011-12-13 2013-06-20 Piezotech Llc Enhanced bandwidth transducer for well integrity measurement
DE102018215067B4 (en) * 2018-09-05 2020-04-23 Continental Automotive Gmbh Switchable sound actuator

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845333A (en) * 1973-09-27 1974-10-29 Us Navy Alternate lead/ceramic stave free-flooded cylindrical transducer
JP2754725B2 (en) * 1989-05-18 1998-05-20 日本電気株式会社 Tuned transducer
DE4020881A1 (en) * 1989-11-09 1991-05-16 Joergen Brosow RESONANCE SWINGARM
JP2546488B2 (en) * 1993-04-22 1996-10-23 日本電気株式会社 Low frequency underwater transmitter
JP2776374B2 (en) * 1996-06-14 1998-07-16 日本電気株式会社 Variable resonant frequency transducer

Also Published As

Publication number Publication date
EP1282896A2 (en) 2003-02-12
ES2251457T3 (en) 2006-05-01
DE60113984T2 (en) 2006-07-27
AU2531501A (en) 2001-07-24
GB0000703D0 (en) 2000-03-08
WO2001052593A2 (en) 2001-07-19
DE60113984D1 (en) 2006-02-23
EP1282896B1 (en) 2005-10-12
WO2001052593A3 (en) 2002-02-21
AU777563B2 (en) 2004-10-21

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Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties