EP0552696B1 - Vorrichtung zum Erzeugen von Ultraschall - Google Patents

Vorrichtung zum Erzeugen von Ultraschall Download PDF

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Publication number
EP0552696B1
EP0552696B1 EP93100652A EP93100652A EP0552696B1 EP 0552696 B1 EP0552696 B1 EP 0552696B1 EP 93100652 A EP93100652 A EP 93100652A EP 93100652 A EP93100652 A EP 93100652A EP 0552696 B1 EP0552696 B1 EP 0552696B1
Authority
EP
European Patent Office
Prior art keywords
layer
assembly according
transducers
layers
plate
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.)
Expired - Lifetime
Application number
EP93100652A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0552696A2 (de
EP0552696A3 (enrdf_load_stackoverflow
Inventor
Rainer Jung
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.)
BANDELIN electronic GmbH and Co KG
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 EP0552696A2 publication Critical patent/EP0552696A2/de
Publication of EP0552696A3 publication Critical patent/EP0552696A3/xx
Application granted granted Critical
Publication of EP0552696B1 publication Critical patent/EP0552696B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • B06B1/0629—Square array

Definitions

  • the invention relates to a device for generating Ultrasound and to transmit this ultrasound to a liquid medium using an electroacoustic transducer a layered structure made of sound-conducting solids.
  • electroacoustic Converter Depending on the type of use of an electroacoustic Converter will also be its structure and design selected. From Ultrasonics Symposium, Volume 2, November 14, 1984, Dallas, Texas, USA, pages 809-814 is an example electroacoustic transducer for the medical field known. Here are a corresponding piezoceramic two layers of adaptation to a patient's skin put on, while on the other hand the piezoceramic of one Damping layer is occupied.
  • the invention relates to Transfer of sound energy into a liquid medium.
  • the specific sound effects are in the ultrasound range, due to the occurrence of cavitation, the largest and are made by inexpensive converter manufacture at Ultrasonic cleaning most used. Have essentially prevailed with Piezoceramics equipped and sandwiched Transducers, mostly in longitudinal vibration modes work.
  • the sound radiating side i.e. a reduced one Ultrasonic intensity
  • the sheet of the radiating side made of stainless steel, i.e., chosen from the same basic material.
  • the coupling pieces can then be welded into pre-cut material or with this through e.g. Solder can be connected directly. Disadvantages arise from an increased energy and Preparation effort, lower efficiency Converter as well as changes in tension and joining of the Base material of the radiating side.
  • the present invention is based on the object To design the converter structure so that a direct and quasi lossless introduction of sound energy into a medium it is possible, however, that expensive joining techniques omitted.
  • the electroacoustic efficiency should be and unwanted energy losses are minimized.
  • a front layer as a sound-emitting layer and a subsequent one Layer are interconnected by a metal layer and together a coupling piece for connecting to others Form elements of one or more transducers.
  • transducer elements can be one or more piezoceramics act with corresponding fasteners are connected to the layers.
  • a method according to the invention is easily created Device proposed an almost lossless Coupling or transmission of ultrasonic waves allows liquid or other media in containers in which are intended to have ultrasound-specific effects.
  • These include in particular ultrasonic cleaning baths and Tubs, immersion transducers, vibrating plates and the like, whose sheet is preferably made of rustproof and chemical resistant materials.
  • the device according to the invention thus consists in this Embodiment from an at least two-layer Vibrating plate or panel, being made up of parts of this Vibrating plate itself or a container or the like. can be molded out.
  • This is first thin layer both part of the actual converter as well at the same time sound-emitting surface.
  • To the thin one Layer joins a thicker layer on which sandwich-like additional elements of the acoustic transducer are constructed, such as corresponding Piezoceramics and pressure pieces.
  • One or both of the layers can be made of a non-metallic Material, for example from a fiber-reinforced plastic, a ceramic or the like. consist. All materials are of the inventive idea which is used as a sound-emitting layer can find.
  • the thicknesses of the layers also determine the frequency.
  • part of the converter namely the or the bodies, from the thick layer like this worked out that the much thinner layer remains unchanged. Should be multiple bodies are provided, so these are through the thinner layer connected, the thinner layer being the sound radiating Forms side. From a sound physics point of view, in In this case, both layers together form the coupling piece of the respective converter.
  • piezoceramics and pressure pieces from e.g. Completed steel can be any number can be configured by transducers on a thin layer depending on the size you want, Power and frequency. However, this is not allowed are overlooked that the scope of the invention also lies that on a thin layer a single body to build up for example, further piezoceramics and pressure pieces followed.
  • thicker layer additionally processed so that Free space or web frame undesirable bending resonances be avoided.
  • the bodies are for example arranged at a distance from one another or but there is a web frame between the bodies.
  • a major advantage of the invention is that the thin layer itself as a container, tub or a plate can be formed. There is also the Possibility of putting the thin layer in a container, a tub or to integrate a plate so that it can be directly connected to the Medium is connected.
  • a two-layer vibrating plate P is made metal composite material shown.
  • the thin layer 1 preferably consists of Stainless steel and has additional holes 3 for connecting or Screwing into a stainless steel tub or the like.
  • the thicker Layer 2 contains worked out bodies 4, which are made of an aluminum alloy. In this body 4 are Threaded holes 5 for screwing with in Figure 7 Piezoceramics and pressure pieces shown molded.
  • the bodies 4 worked out with a square plan, that a distance a stands between them Bending shaft prevented.
  • the shape of the body is cost dependent and can vary his; truncated pyramids are suitable for good load adjustment, for example, a body is also parabolic Conceivable shape.
  • FIGs 3 and 4 is a similar vibrating plate P1 as in Figures 1 and 2 shown. It serves, for example Construction of submersible transducers and also consists of one Layer 1 and 2. In contrast to Figure 1, however between layer 2 and layer 1 a circumferential Edge strips 6 of width b left, which to Welding a hood 7 is used.
  • the bodies 4a molded out of the second layer 2 in contrast to Figure 1 have a circular Floor plan on.
  • layer 2 is a Bridge frame 8 low height worked out to bending waves to prevent in layer 1.
  • the shape and height of the Web frame 8 can vary.
  • the body 4a for example, the truncated cone also has an effective shape.
  • the remaining parts Connect a sound transducer according to Figure 7.
  • Figures 5 and 6 show an extremely simple and inexpensive structure for the realization of multiple arrangements for adequate applications. Unlike the Embodiments of Figures 1 to 4 is layer 2 to not on the threaded holes 5 and an edge strip 6 or only slightly edited. Layers 1 and 2 thus form a common coupling piece of a defined one and frequency determining thickness c for a variety of Converters. Possible bending phenomena of the vibrating plate P2 towards the radiating side of layer 1 take effect avoided. Small flat depressions 9 can of Be advantage, which is dashed in Figures 5 and 6 are shown. The remaining parts of a transducer 7 can P2 on this vibrating plate being constructed.
  • vibrating plates can advantageously not exclusively as a container, tub, plate or the like. be trained.
  • FIG. 7 shows a variant of a single sound transducer S shown as a half-wave composite transducer in Longitudinal mode works. It consists of one at least two-layer composite or clad metal with layers 1 and 2, the axially polarized Piezoceramics 10 and 11, the pressure piece 12 made of steel, Connections 13a and 13b and the pressure screw 14. By means of this pressure screw 14, the piezoceramics, Thrust pieces and connections each in the threaded holes 5 the body 4 can be set.
  • layers 1 and 2 in question are used for layers 1 and 2 in question.
  • this can also be metallic non-metallic materials, for example plastics his. Fiber composites or ceramic materials can also preferred application.
  • the described embodiments are in their geometry variable and thanks to modern mechanical processing techniques easy to implement.
  • the invention Construction also allows the transmission of other vibration modes, e.g. from transverse, torsional or Radial oscillations. This is particularly the case in the exemplary embodiment Sound transducer configuration shown in Figure 7 to change accordingly. That is also conceivable Structure of transducers whose axial direction of expansion is not is only ⁇ / 2 but also a multiple of ⁇ / 2 and the may have multiple working frequencies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP93100652A 1992-01-18 1993-01-18 Vorrichtung zum Erzeugen von Ultraschall Expired - Lifetime EP0552696B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9200559U 1992-01-18
DE9200559U DE9200559U1 (de) 1992-01-18 1992-01-18 Vorrichtung zum Erzeugen von Schall oder Ultraschall

Publications (3)

Publication Number Publication Date
EP0552696A2 EP0552696A2 (de) 1993-07-28
EP0552696A3 EP0552696A3 (enrdf_load_stackoverflow) 1994-01-05
EP0552696B1 true EP0552696B1 (de) 2004-12-08

Family

ID=6875148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100652A Expired - Lifetime EP0552696B1 (de) 1992-01-18 1993-01-18 Vorrichtung zum Erzeugen von Ultraschall

Country Status (2)

Country Link
EP (1) EP0552696B1 (enrdf_load_stackoverflow)
DE (2) DE9200559U1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5204844A (en) * 1990-12-24 1993-04-20 General Electric Company Moment bender transducer
DE19724189C2 (de) * 1997-06-02 2001-07-05 Bandelin Electronic Gmbh & Co Rohrförmige elektroakustische Vorrichtung zur Erzeugung von Ultraschallenergie
WO2010029782A1 (ja) * 2008-09-09 2010-03-18 三菱電機株式会社 超音波発生装置及びそれを搭載した設備機器
CN107866405A (zh) * 2016-09-23 2018-04-03 苏州润桐专利运营有限公司 一种超声波清洗板

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB774043A (en) * 1954-05-05 1957-05-01 Bendix Aviat Corp Sonic transducer with mechanical motion transformer
US3370186A (en) * 1965-02-05 1968-02-20 Blackstone Corp Ultrasonic transducers
US3318578A (en) * 1965-03-22 1967-05-09 Branson Instr Cleaning apparatus
IT1141417B (it) * 1980-04-11 1986-10-01 Dario Felisari Convertitore elettromeccanico monoblocco per l'emissione di onde acustiche ultrasonore nei liquidi tramite l'eccitazione in risonanza meccanica di elementi della stessa parete di contenimento isolati dalla interazione del contorno da opportuni canali di smorzamento

Also Published As

Publication number Publication date
DE59310368D1 (de) 2005-01-13
EP0552696A2 (de) 1993-07-28
EP0552696A3 (enrdf_load_stackoverflow) 1994-01-05
DE9200559U1 (de) 1992-04-23

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