EP0219693A1 - Procédé pour actionner un pulvérisateur à ultrasons afin de pulvériser des fluides - Google Patents

Procédé pour actionner un pulvérisateur à ultrasons afin de pulvériser des fluides Download PDF

Info

Publication number
EP0219693A1
EP0219693A1 EP86112865A EP86112865A EP0219693A1 EP 0219693 A1 EP0219693 A1 EP 0219693A1 EP 86112865 A EP86112865 A EP 86112865A EP 86112865 A EP86112865 A EP 86112865A EP 0219693 A1 EP0219693 A1 EP 0219693A1
Authority
EP
European Patent Office
Prior art keywords
atomizer
ultrasonic
current
period
operating
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
EP86112865A
Other languages
German (de)
English (en)
Other versions
EP0219693B1 (fr
Inventor
Gerald Dipl.-Ing. Benndorf (Fh)
Klaus Van Der Linden
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to AT86112865T priority Critical patent/ATE68111T1/de
Publication of EP0219693A1 publication Critical patent/EP0219693A1/fr
Application granted granted Critical
Publication of EP0219693B1 publication Critical patent/EP0219693B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0623—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn
    • B05B17/063—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers coupled with a vibrating horn having an internal channel for supplying the liquid or other fluent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0653—Details
    • B05B17/0669—Excitation 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
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
    • B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal
    • B06B1/0253—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken directly from the generator circuit
    • 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
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/50—Application to a particular transducer type
    • B06B2201/55—Piezoelectric transducer
    • 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
    • B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
    • B06B2201/70—Specific application
    • B06B2201/77—Atomizers

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • a method for operating an ultrasonic oscillator for liquid atomization is known, the electrical power being supplied in a timed manner and the power supplied being sufficient on average for the amount of liquid set, while the respective peak power is so high that a short supply of liquid is too short can be shaken off (DE-OS 33 14 609).
  • the ultrasonic oscillator must be manually adjusted to its basic operating frequency, and the ultrasonic atomizers, which have manufacturing tolerances and which have different working frequencies, for example, cannot be exchanged without adjustment.
  • the object of the invention is to design an ultrasonic liquid atomizer which enables reliable atomization with continuously automatic frequency adjustment and automatic shaking off of a flooding atomizing plate. Furthermore, a low power consumption of the electronics, a low temperature load and a high atomization rate should be guaranteed. Automatic temperature monitoring should be integrated.
  • the method according to the invention When the method according to the invention is carried out, reliable atomization with low power consumption of the electronics and a lower temperature load on the ultrasonic atomizer are achieved.
  • the optimum working frequency of the ultrasonic atomizer is found quickly since only a predetermined frequency range in which the working frequency of the ultrasonic liquid atomizer lies has to be run through. Furthermore, the operational safety is increased, since a snapping on a different frequency, e.g. the compound resonance frequency of the ultrasonic atomizer, which would lead to the destruction of the ultrasonic atomizer, does not occur in the embodiment according to the invention.
  • the ultrasonic atomizer is excited with a burst whose pulse duration is t 1. It vibrates over time duration t2 free before the next burst follows (FIG 3).
  • the current through the output stage is detected proportionally to the current through the ultrasonic atomizer and converted into a voltage - see FIG t4 measured and this value stored in a measured value memory (FIG 1, FIG 3 and FIG 4).
  • this measured value is transferred from memory I to memory II (FIG. 4).
  • the current measured value then newly recorded by the measured value memory I is compared by a comparator with the previous current measured value stored in the measured value memory II (FIG. 4).
  • the frequency is increased by one step per burst. This can be the case when the circuit is started up when the optimum operating frequency is sought.
  • the frequency is reduced by one step per burst.
  • the working frequency of the electronics is forcibly reduced by one step after a certain period of time t7 (FIG. 4).
  • the invention is illustrated by the dependence of the current through the output stage (proportional to the current through the ultrasonic oscillator) after processing by the electronics as a function of the frequency.
  • 2 shows particularly clearly the effect according to the invention, according to which the working frequency of the ultrasonic atomizer can be found very quickly and it does not matter whether it is damped (flooded atomizing plate) or vibrates freely.
  • the search direction goes from low to high frequencies.
  • the transition of the atomizer from the strongly damped (flooded) to the weakly damped (atomizing) state - combined with an increase in the working frequency of the ultrasonic atomizer - also takes place very quickly.
  • Another advantage is that after finding the optimal atomizer operating frequency, the circuit oscillates closely around the optimal operating point. In areas "A" outside of the optimal operating points, a constant current measurement value is specified by appropriate circuit measures so that the circuit can snap into place at the operating frequency of the ultrasonic atomizer.
  • the method according to the invention is particularly suitable for operating a piezoelectric ultrasonic atomizer with a piezoceramic and an amplitude transformer with an atomizing plate (see FIG. 5).
  • a temperature-dependent resistor to the ceramic of the ultrasonic atomizer (FIG. 6). If, for example, an impermissibly high temperature would occur on the ultrasonic atomizer as a result of running dry, the electronics switch off the output stage until the ultrasonic atomizer has cooled down again to permissible temperatures.
  • Ultrasonic liquid atomizers working according to the method according to the invention are particularly suitable for atomizing fuel, such as diesel oil, gasoline, for burners, engines, generators and auxiliary heaters, for cosmetics, such as hairspray, deodorants and perfumes, for cleaning agents, medications for inhalation purposes, solvents and water, For example in humidifiers, small climate chambers, air conditioning systems and terrariums as well as for use in systems for coating, humidification and air conditioning.
  • the method according to the invention is used with particular advantage to operate a piezoelectric ultrasonic atomizer with a piezoceramic and an amplitude transformer with an atomizing plate and excitation electronics.
  • FIG. 1 the voltage drop caused by the current is plotted on the ordinate, while time is shown on the abscissa. No measurement takes place during the period t3. The measurement is made during the period t4. The duration of the burst signal is t1.
  • FIG. 4 shows a block diagram of an excitation electronics according to the invention.
  • the voltage supply 12 an on-off switch, 13 the burst and frequency generation, 14 the pre-stage, 15 the final stage, 16 the transmitter, 3 the ultrasonic liquid atomizer, 2 an temperature-dependent resistance, with 17 the power supply, with 18 and 19 the measured value coil I and II, with 20 the measured value comparator and with 22 the frequency control.
  • the ultrasonic liquid atomizer 3 is excited via a preliminary and final stage with a burst, the burst frequency of which can be regulated by the method according to the invention.
  • the regulation takes place via a current measurement at different times and a comparison of different currents.
  • a temperature-dependent resistor 2 is attached to the ultrasonic atomizer 3.
  • the electronics are switched off by the temperature-dependent resistor 2 at impermissible temperatures.
  • FIG. 5 shows the ultrasonic liquid atomizer with a piezoceramic 4, the coupled amplitude transformer 5 and the atomizing plate 6.
  • the tube 7 integrated in the atomizer cone serves to supply liquid. 8 is the excitation electronics.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Special Spraying Apparatus (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP86112865A 1985-09-30 1986-09-17 Procédé pour actionner un pulvérisateur à ultrasons afin de pulvériser des fluides Expired - Lifetime EP0219693B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86112865T ATE68111T1 (de) 1985-09-30 1986-09-17 Verfahren zum betrieb eines ultraschallzerstaeubers zur fluessigkeitszerstaeubung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3534853 1985-09-30
DE19853534853 DE3534853A1 (de) 1985-09-30 1985-09-30 Verfahren zum betrieb eines ultraschallzerstaeubers zur fluessigkeitszerstaeubung

Publications (2)

Publication Number Publication Date
EP0219693A1 true EP0219693A1 (fr) 1987-04-29
EP0219693B1 EP0219693B1 (fr) 1991-10-09

Family

ID=6282366

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112865A Expired - Lifetime EP0219693B1 (fr) 1985-09-30 1986-09-17 Procédé pour actionner un pulvérisateur à ultrasons afin de pulvériser des fluides

Country Status (4)

Country Link
US (1) US4689515A (fr)
EP (1) EP0219693B1 (fr)
AT (1) ATE68111T1 (fr)
DE (2) DE3534853A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996000132A3 (fr) * 1994-06-23 1996-03-28 Jem Smoke Machine Co Procede de creation d'un effet
EP1875969A1 (fr) * 2006-07-07 2008-01-09 L'oreal Générateur pour exciter un transducteur piézoélectrique

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60222552A (ja) * 1984-04-19 1985-11-07 Toa Nenryo Kogyo Kk 超音波噴射方法
JPS6338193A (ja) * 1986-08-01 1988-02-18 Toa Nenryo Kogyo Kk 超音波振動子ホ−ン
US4799622A (en) * 1986-08-05 1989-01-24 Tao Nenryo Kogyo Kabushiki Kaisha Ultrasonic atomizing apparatus
KR900007413B1 (ko) * 1986-08-26 1990-10-08 마쯔시다덴기산교 가부시기가이샤 초음파 모우터구동 방법
CH672894A5 (fr) * 1987-09-14 1990-01-15 Undatim Ultrasonics
US4966131A (en) * 1988-02-09 1990-10-30 Mettler Electronics Corp. Ultrasound power generating system with sampled-data frequency control
US5095890A (en) * 1988-02-09 1992-03-17 Mettler Electronics Corp. Method for sampled data frequency control of an ultrasound power generating system
US5113116A (en) * 1989-10-05 1992-05-12 Firma J. Eberspacher Circuit arrangement for accurately and effectively driving an ultrasonic transducer
JPH03161083A (ja) * 1989-11-17 1991-07-11 Aisin Seiki Co Ltd 圧電振動子の駆動装置および該駆動装置を使用した水滴除去装置
GB9226474D0 (en) * 1992-12-18 1993-02-10 Ici Plc Production of particulate materials
US5387180A (en) * 1993-05-20 1995-02-07 Allergan, Inc. Ultrasonic frequency synthesizer for phaco surgery
DE4412900C2 (de) * 1994-04-14 2000-04-27 Eberspaecher J Gmbh & Co Verfahren und Vorrichtung zum Feststellen des Einsetzens einer Überflutung eines Ultraschallzerstäubers
US5560543A (en) * 1994-09-19 1996-10-01 Board Of Regents, The University Of Texas System Heat-resistant broad-bandwidth liquid droplet generators
US5568003A (en) * 1994-09-28 1996-10-22 Zygo Corporation Method and apparatus for producing repeatable motion from biased piezoelectric transducers
US5970974A (en) * 1995-03-14 1999-10-26 Siemens Aktiengesellschaft Dosating unit for an ultrasonic atomizer device
EP0814860B1 (fr) * 1995-03-14 1999-11-03 Siemens Aktiengesellschaft Atomiseur a ultrasons pourvu d'une unite de dosage precis amovible
MXPA01008926A (es) 1999-03-05 2003-07-21 Johnson & Son Inc S C Sistema de control para atomizar liquidos con un vibrador piezoelectrico.
DE19916161B4 (de) * 1999-04-11 2008-06-05 Dürr Dental GmbH & Co. KG Einrichtung zur Erzeugung hochfrequenter mechanischer Schwingungen für ein dentales Handstück
FR2802118A1 (fr) * 1999-12-10 2001-06-15 Touzova Tamara Procede et dispositif vibratoire de conditionnement, de climatisation, de refroidissement et de decontamination, de desinfection, de sterilisation de milieux physiques
US7077853B2 (en) * 2000-10-20 2006-07-18 Ethicon Endo-Surgery, Inc. Method for calculating transducer capacitance to determine transducer temperature
US7687744B2 (en) 2002-05-13 2010-03-30 S.C. Johnson & Son, Inc. Coordinated emission of fragrance, light, and sound
CN1820543B (zh) 2003-02-07 2010-11-17 约翰逊父子公司 具有发光二极管夜灯的散射器
US7645300B2 (en) 2004-02-02 2010-01-12 Visiogen, Inc. Injector for intraocular lens system
DE202005003298U1 (de) * 2005-03-02 2006-07-13 Argillon Gmbh Ultraschallzerstäuber
US7281811B2 (en) 2005-03-31 2007-10-16 S. C. Johnson & Son, Inc. Multi-clarity lenses
USD542400S1 (en) 2005-03-31 2007-05-08 S.C. Johnson & Son, Inc. Diffuser
US7643734B2 (en) 2005-03-31 2010-01-05 S.C. Johnson & Son, Inc. Bottle eject mechanism
USD541922S1 (en) 2005-03-31 2007-05-01 S.C. Johnson & Son, Inc. Diffuser
US7589340B2 (en) * 2005-03-31 2009-09-15 S.C. Johnson & Son, Inc. System for detecting a container or contents of the container
WO2006125251A1 (fr) * 2005-05-23 2006-11-30 Biosonic Australia Pty. Ltd. Appareil d’atomisation et de filtrage de liquide
WO2009155245A1 (fr) * 2008-06-17 2009-12-23 Davicon Corporation Appareil de distribution de liquide utilisant un procédé passif de dosage de liquide
IT1393824B1 (it) * 2009-04-20 2012-05-11 Zobele Holding Spa Atomizzatore di liquidi con dispositivo di vibrazione piezoelettrico a circuito elettronico di controllo perfezionato e relativo metodo di azionamento.
EA022926B1 (ru) * 2009-07-17 2016-03-31 Нектар Терапьютикс Системы и способы управления герметичными небулайзерами
JP5429993B2 (ja) * 2010-03-04 2014-02-26 国立大学法人東京工業大学 匂い発生装置
US10201673B2 (en) * 2011-11-15 2019-02-12 Koninklijke Philips N.V. Nebulizer, a control unit for controlling the same and a method of operating a nebulizer
EP2796208A1 (fr) * 2013-04-22 2014-10-29 Ipratech SA Procédé pour commander une cellule acoustique
JP6526003B2 (ja) * 2013-08-23 2019-06-05 コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． 投薬システム
US12052925B2 (en) 2016-01-23 2024-07-30 Liat Keng KANG Method and device for driving a piezoelectric device
CN112583395B (zh) * 2020-12-03 2023-03-28 成都动芯微电子有限公司 超声波雾化片频率追踪系统及方法
CN115363282A (zh) * 2021-05-21 2022-11-22 深圳市合元科技有限公司 电子雾化装置及控制方法
CN116637758B (zh) * 2023-05-23 2026-03-24 南京林业大学 基于超磁致伸缩材料的变频雾化喷头及雾滴粒径调控方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1240316B (de) * 1962-03-30 1967-05-11 Aeroprojects Inc Geraet zur Nachfuehrung der Frequenz eines Ultraschallgenerators bei Temperaturschwankungen
US3842340A (en) * 1969-02-20 1974-10-15 Philips Corp Generator for producing ultrasonic oscillations
FR2421513A1 (fr) * 1978-03-31 1979-10-26 Gaboriaud Paul Atomiseur ultra-sonique a pilotage automatique
US4275363A (en) * 1979-07-06 1981-06-23 Taga Electric Co., Ltd. Method of and apparatus for driving an ultrasonic transducer including a phase locked loop and a sweep circuit
EP0123277A2 (fr) * 1983-04-22 1984-10-31 Siemens Aktiengesellschaft Méthode pour l'excitation d'un oscillateur ultrasonique pour pulvériser un liquide
US4578650A (en) * 1983-06-15 1986-03-25 Watson Industries, Inc. Resonance drive oscillator circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889166A (en) * 1974-01-15 1975-06-10 Quintron Inc Automatic frequency control for a sandwich transducer using voltage feedback
DE2721225C2 (de) * 1977-05-11 1981-10-29 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Frequenz- Selbststeuerung eines Ultraschall- Sendewandlers
SU760246A1 (en) * 1978-05-16 1980-08-30 Le Polt I Im M I Kalinina Method and device for phase control in piezosemiconductor transformer
DE3222425A1 (de) * 1982-06-15 1983-12-22 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Generator zum antrieb eines piezoresonators

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1240316B (de) * 1962-03-30 1967-05-11 Aeroprojects Inc Geraet zur Nachfuehrung der Frequenz eines Ultraschallgenerators bei Temperaturschwankungen
US3842340A (en) * 1969-02-20 1974-10-15 Philips Corp Generator for producing ultrasonic oscillations
FR2421513A1 (fr) * 1978-03-31 1979-10-26 Gaboriaud Paul Atomiseur ultra-sonique a pilotage automatique
US4275363A (en) * 1979-07-06 1981-06-23 Taga Electric Co., Ltd. Method of and apparatus for driving an ultrasonic transducer including a phase locked loop and a sweep circuit
EP0123277A2 (fr) * 1983-04-22 1984-10-31 Siemens Aktiengesellschaft Méthode pour l'excitation d'un oscillateur ultrasonique pour pulvériser un liquide
US4578650A (en) * 1983-06-15 1986-03-25 Watson Industries, Inc. Resonance drive oscillator circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996000132A3 (fr) * 1994-06-23 1996-03-28 Jem Smoke Machine Co Procede de creation d'un effet
EP1875969A1 (fr) * 2006-07-07 2008-01-09 L'oreal Générateur pour exciter un transducteur piézoélectrique
FR2903331A1 (fr) * 2006-07-07 2008-01-11 Oreal Generateur pour exciter un transducteur piezoelectrique
US7960894B2 (en) 2006-07-07 2011-06-14 L'oreal S.A. Generator for exciting piezoelectric transducer

Also Published As

Publication number Publication date
DE3681871D1 (de) 1991-11-14
DE3534853A1 (de) 1987-04-02
US4689515A (en) 1987-08-25
ATE68111T1 (de) 1991-10-15
EP0219693B1 (fr) 1991-10-09

Similar Documents

Publication Publication Date Title
EP0219693A1 (fr) Procédé pour actionner un pulvérisateur à ultrasons afin de pulvériser des fluides
DE3686574T2 (de) Vorrichtung zum zertaeuben von kraftstoff durch ultraschall fuer brennkraftmaschinen.
DE69207223T2 (de) Vorrichtung zum Messen von Strömen
EP0213283A1 (fr) Dispositif pour l'examen de pièces de monnaie
DE19626101B4 (de) Schaltungsanordnung zum Starten und Betreiben einer Hochdruckentladungslampe
DE19814594A1 (de) Verfahren und Vorrichtung zum Laden und Entladen eines piezoelektrischen Elements
DE3708210A1 (de) Schaltungsanordnung zur auswertung der signale eines induktiven messwertaufnehmers
DE2916540C2 (de) Elektrische Schaltungsanordnung zur Ansteuerung eines piezoelektrischen Wandlers
DE4036618C3 (de) Vorrichtung zum Ansteuern eines piezoelektrischen Vibrators
DE3230829C2 (fr)
EP0303944A1 (fr) Procédé et circuit pour l'excitation d'un vibrateur ultrasonore et leur application à la pulvérisation d'un liquide
DE19646917A1 (de) Vorrichtung zum Erfassen eines Zustands einer Verbrennung in einer Brennkraftmaschine
DE3314609A1 (de) Verfahren zum betrieb eines ultraschall-schwingers zur fluessigkeitszerstaeubung
WO1989002826A1 (fr) Procede et dispositif pour controler la projection de gouttes par les buses de sortie d'une tete d'ecriture a encre
AT413867B (de) Kapazitives entladungszündungssystem für einen verbrennungsmotor
DE3216186A1 (de) Laseranordnung
EP0421439B1 (fr) Pulvérisateur à ultrason
DE4244761C2 (de) Füllstand-Grenzschalter
DE10336606A1 (de) Stellverfahren und Stellvorrichtung für einen Aktor
DE4444409C1 (de) Einrichtung zur Messung der Induktivität einer Spule
DE602004011669T2 (de) Schaltnetzteil
DE2444511A1 (de) Anordnung zur messung der stroemungsgeschwindigkeit eines gasfoermigen mediums, insbesondere des luftdurchsatzes im saugrohr einer brennkraftmaschine
DE3809110C2 (de) Einrichtung zur Gasmassenstrommessung
EP0016864A1 (fr) Circuit pour la commande du fonctionnement intermittent d'un moteur d'essuie-glace de véhicule
DE2102864C3 (de) Zündeinrichtung für Brennkraftmaschinen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19870826

17Q First examination report despatched

Effective date: 19890714

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

REF Corresponds to:

Ref document number: 68111

Country of ref document: AT

Date of ref document: 19911015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3681871

Country of ref document: DE

Date of ref document: 19911114

ET Fr: translation filed
ITF It: translation for a ep patent filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930827

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19930920

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930930

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19931215

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19940917

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940930

Ref country code: CH

Effective date: 19940930

Ref country code: BE

Effective date: 19940930

EAL Se: european patent in force in sweden

Ref document number: 86112865.0

BERE Be: lapsed

Owner name: SIEMENS A.G.

Effective date: 19940930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19960821

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960912

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19960926

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19961118

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970917

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19970918

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19970930

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19970917

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980603

EUG Se: european patent has lapsed

Ref document number: 86112865.0

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050917