EP0327486A2 - Radiateur à haute intensité pour son ou ultrason focalisé employé dans des fluides - Google Patents

Radiateur à haute intensité pour son ou ultrason focalisé employé dans des fluides Download PDF

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Publication number
EP0327486A2
EP0327486A2 EP89500014A EP89500014A EP0327486A2 EP 0327486 A2 EP0327486 A2 EP 0327486A2 EP 89500014 A EP89500014 A EP 89500014A EP 89500014 A EP89500014 A EP 89500014A EP 0327486 A2 EP0327486 A2 EP 0327486A2
Authority
EP
European Patent Office
Prior art keywords
radiator
sonic
plate
ultrasonic radiator
accordance
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.)
Withdrawn
Application number
EP89500014A
Other languages
German (de)
English (en)
Other versions
EP0327486A3 (fr
Inventor
Gallego J.A. Juárez
Rodr Guez G. Instituto De Ac Stica Corral
San Emeterio J.L. Prieto
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.)
Consejo Superior de Investigaciones Cientificas CSIC
Original Assignee
Consejo Superior de Investigaciones Cientificas CSIC
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 Consejo Superior de Investigaciones Cientificas CSIC filed Critical Consejo Superior de Investigaciones Cientificas CSIC
Publication of EP0327486A2 publication Critical patent/EP0327486A2/fr
Publication of EP0327486A3 publication Critical patent/EP0327486A3/fr
Withdrawn legal-status Critical Current

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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
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B3/04—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency involving focusing or reflecting
    • 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
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Definitions

  • the object of the present patent application is a new type of sonic or ultrasonic radiator that produces a high concentration of acoustic energy in a localized area of the medium being irradiated.
  • the said radiator is designed to operate in fluids.
  • This new type of radiator consists basically of a plate which has discontinuos profiles on both its faces and which vibrates flexurally when excited by a vibrator that may be piezoelectric magnetostrictive, etc. in nature.
  • the present invention relates to a new type of flexural radiator of variable thickness with a discontinuous profile on its radiating surface, by means of which most of the energy radiated reaches a previously selected point (focus) in phase.
  • the said profile is obtained by suitably displacing the various internodal zones along the axis of the plate.
  • the amplitude distribution can be regulated by balancing the masses of the differente internodal zones.
  • the profile on the back surface of the plate is also discontinuous, such that the different thicknesses of the internodal zones, due to the effect of mass, give rise to similar amplitudes of vibration in each zone.
  • the result is a new type of acoustic radiator in which both amplitude and phase are regulated by the dual discontinuous profiles, such that the energy radiated is concentrated around a predetermined point.
  • the resulting uniform amplitude distribution helps maximize the power capacity of the emitter by preventing the build-up of fatigue-producing stresses in specific regions.
  • Plate profiles carculated in the way tend to be complex. In actual practice, profiles can be simplified with only minor effects on focalization.
  • the goal of the back-surface profile design is to regulate the amplitudes of vibration via distribution of mass. Such distribution is based on the fact that, generally speaking, the smaller the thickness the larger the amplitude of vibration obtained. Given that, in a flexurally vibrating plate of constant thickness excited at the centre, the vibration amplitudes in the peripheral regions are lower than at the centre, amplitude distribution can be made uniform by ensuring that plate thickness is greater at the centre than at the periphery.
  • Figure 2 illustrates an example of a rear profile obtained by applying this principle.
  • radiators were built from circular plates excited at the centre by piezoelectric vibrators.
  • a radiator for use in gases 500 mm in diameter designed to vibrate at at a frequency of 21 kHz in its seventh axisymmetrical mode (seven nodal circles) may be taken by way of example.
  • Figure 3 presents a diagramme of such a radiator. The energy concentration effect becomes quite clear when the axial field distribution of the new radiator is compared with that of an equivalent flat radiator, under the assumption that the maximum values of velocity at the centres of the plates are the same.
  • Figure 4 despicts the variation in the amplitude of the acoustic pressure radiated along axis P (in arbitrary units) with distance D (in cm) from the centre of the plate for a radiator built according to the innovations covered by the present patent application.
  • Figure 5 shows the same amplitude variation for a flat radiator. Using the prototype radiator illustrated in Figure 3, it is possible to concentrate energy along the axis in a focal volume which, for a drop in accoustic pressure less than or equal to 3 dB, is approximately 15 cm in lenght by 2.4 cm in diameter.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Transducers For Ultrasonic Waves (AREA)
EP89500014A 1988-02-05 1989-02-03 Radiateur à haute intensité pour son ou ultrason focalisé employé dans des fluides Withdrawn EP0327486A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES8800327 1988-02-05
ES8800327A ES2008968A6 (es) 1988-02-05 1988-02-05 Radiador sonico o ultrasonico focalizado para aplicaciones de alta intensidad en fluidos.

Publications (2)

Publication Number Publication Date
EP0327486A2 true EP0327486A2 (fr) 1989-08-09
EP0327486A3 EP0327486A3 (fr) 1990-08-29

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP89500014A Withdrawn EP0327486A3 (fr) 1988-02-05 1989-02-03 Radiateur à haute intensité pour son ou ultrason focalisé employé dans des fluides

Country Status (2)

Country Link
EP (1) EP0327486A3 (fr)
ES (1) ES2008968A6 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005331A1 (fr) * 1989-10-06 1991-04-18 Consejo Superior Investigaciones Cientificas Unite electro-acoustique pour la production de hautes intensites soniques et ultra-soniques dans des gaz et des interphases
US5299175A (en) * 1989-10-06 1994-03-29 Consejo Superior De Investigaciones Cientificas Electroacoustic unit for generating high sonic and ultra-sonic intensities in gases and interphases
FR2791912A1 (fr) * 1999-04-12 2000-10-13 Techsonic Sarl Fenetre acoustique a faible contamination s'integrant dans un dispositif de nettoyage par ultrasons et megasons
CN101096030B (zh) * 2006-06-26 2010-12-08 深圳职业技术学院 超声波辐射器
EP1914717A4 (fr) * 2005-07-27 2017-01-18 Gallego Juarez, Juan A. Generateur de sons et d'ultrasons haute intensite, destine au demoussage industriel de liquides par voie aerienne
US11521590B2 (en) 2019-06-24 2022-12-06 The Boeing Company High-power ultrasound emitter design
RU2843910C1 (ru) * 2025-03-07 2025-07-21 Хмелев Владимир Николаевич Ультразвуковая колебательная система для газовых сред

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ULTRASONICS INTERNATIONAL 85, CONFERENCE PROCEEDINGS, London, 2nd - 4th July 1985, pages 506-511; G. RODRIGUEZ et al.: "High-power ultrasonic equipment for industrial defoaming" *
ULTRASONICS INTERNATIONAL 87, CONFERENCE PROCEEDINGS, London, 6th - 9th July 1987, pages 794-799; G. RODRIGUEZ-CORRAL et al.: "Focused high-power ultrasonic transducer with stepped-plate radiator for industrial application in gases" *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991005331A1 (fr) * 1989-10-06 1991-04-18 Consejo Superior Investigaciones Cientificas Unite electro-acoustique pour la production de hautes intensites soniques et ultra-soniques dans des gaz et des interphases
US5299175A (en) * 1989-10-06 1994-03-29 Consejo Superior De Investigaciones Cientificas Electroacoustic unit for generating high sonic and ultra-sonic intensities in gases and interphases
FR2791912A1 (fr) * 1999-04-12 2000-10-13 Techsonic Sarl Fenetre acoustique a faible contamination s'integrant dans un dispositif de nettoyage par ultrasons et megasons
EP1914717A4 (fr) * 2005-07-27 2017-01-18 Gallego Juarez, Juan A. Generateur de sons et d'ultrasons haute intensite, destine au demoussage industriel de liquides par voie aerienne
CN101096030B (zh) * 2006-06-26 2010-12-08 深圳职业技术学院 超声波辐射器
US11521590B2 (en) 2019-06-24 2022-12-06 The Boeing Company High-power ultrasound emitter design
RU2843910C1 (ru) * 2025-03-07 2025-07-21 Хмелев Владимир Николаевич Ультразвуковая колебательная система для газовых сред

Also Published As

Publication number Publication date
EP0327486A3 (fr) 1990-08-29
ES2008968A6 (es) 1989-08-16

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