EP2734384A2 - Circuit de régulation et procédé permettant de faire fonctionner un appareil à ultrasons - Google Patents

Circuit de régulation et procédé permettant de faire fonctionner un appareil à ultrasons

Info

Publication number
EP2734384A2
EP2734384A2 EP12742820.9A EP12742820A EP2734384A2 EP 2734384 A2 EP2734384 A2 EP 2734384A2 EP 12742820 A EP12742820 A EP 12742820A EP 2734384 A2 EP2734384 A2 EP 2734384A2
Authority
EP
European Patent Office
Prior art keywords
power
ultrasound
temperature
change
ultrasonic
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Withdrawn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
EP12742820.9A
Other languages
German (de)
English (en)
Inventor
Dieter Weber
Markus Weber
Thomas Dreyer
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.)
Weber Ultrasonics GmbH
Original Assignee
Weber Ultrasonics GmbH
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 Weber Ultrasonics GmbH filed Critical Weber Ultrasonics GmbH
Publication of EP2734384A2 publication Critical patent/EP2734384A2/fr
Withdrawn legal-status Critical Current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
    • B06B1/0207—Driving circuits
    • 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
    • B06B2201/40—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups with testing, calibrating, safety devices, built-in protection, construction details
    • 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
    • B06B2201/71—Cleaning in a tank
    • 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
    • B06B2201/74—Underwater
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
    • B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations

Definitions

  • the invention relates to a method according to the preamble of patent claim 1 for operating an ultrasound device, which ultrasound device comprises at least one ultrasound transducer and at least one ultrasound generator, which ultrasound transducer is excited by the ultrasound generator to vibrate.
  • the invention relates to a control circuit according to the preamble of claim 8 for an ultrasound device, which ultrasound device comprises at least one ultrasonic transducer and at least one ultrasonic generator, which ultrasonic transducer can be excited by the ultrasonic generator to vibrate.
  • the invention relates to an ultrasound device according to the preamble of claim 13, comprising at least one ultrasonic transducer and at least one ultrasonic generator, which ultrasonic vibrator can be excited by the ultrasonic generator to vibrate.
  • Ultrasonic devices and methods for their operation and appropriately trained control circuits of the type mentioned in each case are known to those skilled in many ways.
  • Such ultrasound devices can be, without limitation, ultrasonic cleaning devices in which an object to be cleaned is introduced into a container of the ultrasound device, which container can be filled with a liquid cleaning medium.
  • the ultrasonic vibrator which is excited by the ultrasonic generator to oscillate, then delivers at least part of the absorbed electrical power in the form of ultrasonic waves to the cleaning medium, which results in the desired cleaning effect in the cleaning medium.
  • the temperature (operating temperature) of the ultrasound oscillator may increase due to dissipation effects.
  • the invention has for its object to provide a method for operating an ultrasound device, a control circuit for an ultrasound device and a corresponding ultrasound device itself, which avoid the above-mentioned problems and to ensure that there is no overheating during operation of the ultrasound device and Damage to the ultrasonic vibrator comes.
  • a method for operating an ultrasound device which ultrasound device comprises at least one ultrasound oscillator and at least one ultrasound generator, is excited by the ultrasound generator to oscillate, characterized in that a temperature of the ultrasound transducer is determined during operation of the ultrasound device, and in that Depending on the determined temperature modified by the ultrasonic generator delivered to the ultrasonic oscillator performance is, for which purpose a change in an actual size and / or a Soil size of the control loop is made in a control loop of the ultrasonic generator.
  • a control circuit for an ultrasound device which ultrasound device comprises at least one ultrasound transducer and at least one ultrasound generator, which ultrasound transducer can be excited by the ultrasound generator to oscillate, characterized in that at least the following elements provided in signal-operative connection with a control circuit of the ultrasound generator, preferably the power control loop are: temperature measuring means, which are designed to determine a temperature of the ultrasonic vibrator; and power modifying means configured to modify a power supplied to the ultrasonic vibrator by the ultrasonic generator in response to the detected temperature; wherein the power reducing means are further adapted to make in the control loop of the ultrasonic generator, a change in an actual size and / or a desired size of the control loop, preferably a change in the actual power and / or the desired power.
  • an ultrasound device comprising at least one ultrasound oscillator and at least one ultrasound generator, which ultrasound transducer can be excited to oscillate by the ultrasound generator, is characterized in that in the ultrasound generator or in operative signaling connection with the latter and furthermore in signaitechnical operative connection with a control circuit of the ultrasound device, preferably the Power control circuit, a control circuit is provided with at least the following elements: Temperaturmessmittei, which are designed to determine a temperature of the ultrasonic vibrator; and power modifying means configured to modify a power supplied to the ultrasonic vibrator by the ultrasonic generator in dependence on the detected temperature, wherein the power reducing means are further adapted to change in the control loop of the ultrasonic generator a change in an actual size and / or a desired size of the control loop make, preferably a change in the actual power and / or the target power.
  • a control circuit is provided with at least the following elements: Temperaturmessmittei, which are designed to determine a temperature of the ultrasonic vibrator; and
  • the power supplied to the ultrasonic vibrator by the ultrasonic generator is reduced in order to be measured. counteract this increase in temperature and extend the life of the ultrasonic vibrator.
  • this is done by means of a Regeiungsscchez invention fully automatic and variable adjustable with respect to that temperature threshold at which the control circuit according to the invention is active in order to reduce the power.
  • the applied power reduction factor can also be variably predetermined.
  • said change of an actual size of the control loop is made to the actual size of the power control loop. This is preferably done in such a way that a value is added to or subtracted from the actual size and / or the desired size is multiplied by a value.
  • the actual power is increased by addition of a value, so that the power control loop of the ultrasonic generator counteracts the apparent power increase and thus reduces the effective power supply to the ultrasonic vibrator, which counteracts a temperature increase there , Additionally or alternatively, the desired power may be reduced multiplicatively, which also reduces the effective power supply to the vibrator.
  • Said change may include a stepwise adjustment of the actual size per temperature unit, which corresponds to a choice of the already mentioned reduction factor.
  • the degree of change in the course of a corresponding development of the present invention may be dependent on the determined temperature. The same applies mutatis mutandis to the multiplicative adjustment of the target power.
  • Yet another development of the method according to the invention provides that the degree of change in the actual size of a desired size of the control loop, preferably from the soli power of the line control loop is dependent, most preferably the change proportional to the desired size is.
  • TS denotes the measured temperature of the ultrasound transducer or a corresponding signal value and REF the temperature threshold, from which temperature threshold the power reduction according to the invention is to be used
  • the following formula-specific relationship can be indicated in particular (SL: set power (setpoint signal), VS: change in the Actual power or corresponding signal, TS ': temperature change or corresponding signal):
  • useful embodiments of the control circuit according to the invention provide, in particular, that temperature comparison means are provided in operative connection with the temperature measuring means, which are designed to compare the determined temperature with a variable reference value, which has already been discussed above.
  • the power modifying means of the control circuit can be controlled by a comparison signal generated as a result of the comparison.
  • the mentioned comparison signal can be generated for example by subtraction of a signal symbolizing the measured temperature and of the temperature threshold value.
  • the power modifiers of the control circuit become active accordingly if this comparison signal is in a certain range of values, preferably in the positive value range.
  • control circuit may comprise multiplier means which are designed to generate the change signal by multiplying the comparison signal by a solisignal corresponding to the setpoint size of the control loop.
  • control circuit is preferably a power control loop of the ultrasound generator, so that the said desired variable is preferably the soli power correspondingly.
  • control circuit according to the invention in the course of another development may have additional adder, which are designed to add the change signal to one of the actual size, preferably the actual power, of the control loop corresponding signal. In this way, the planned increase in the actual size can be achieved by circuitry.
  • the crumodifizierstoff comprise multiplying means, which are designed to multiply a target size corresponding desired signal with the comparison signal or a signal derived therefrom.
  • the planned reduction of the target size can be realized by circuitry.
  • the following preferred mode of operation of an ultrasound device can result:
  • the power delivered by the ultrasound generator to the ultrasound transducer is reduced from an adjustable temperature value relative to a temperature measurement on or in the ultrasound transducer.
  • a power reduction per unit of temperature can be predetermined and calculated proportionally to the desired power, or a reduction of the desired power is specified.
  • the mentioned intervention is made on the actual size of the power control loop.
  • the actual power measured during operation is added to a value. which is proportional to the desired power and dependent on the measured temperature. Once the measured temperature drops below the set threshold again, the actual actual power is readjusted in the usual way until it reaches the setpoint. In this way, temperature-induced damage to ultrasonic transducers can be safely and fully automatically avoided.
  • FIG. 1 shows a schematic block diagram of an ultrasound apparatus according to the invention, which comprises a control circuit according to the invention for carrying out a method according to the invention;
  • FIG. 2 shows a schematic block diagram of another ultrasonic device according to the invention, which comprises an alternative control circuit according to the invention for carrying out a method according to the invention.
  • FIG. 1 schematically shows, by means of a block diagram, an embodiment of the ultrasound apparatus according to the invention, which is denoted by reference numeral 1 in its entirety.
  • the ultrasound device 1 comprises an ultrasound generator 2 in signaitechnically operative connection with an ultrasound transducer 3, which ultrasound transducer 3 is located, without limitation, in a container or tank 4, which container 4 is filled with a liquid cleaning medium 5.
  • the ultrasound device 1 comprises a control circuit 6, which is symbolized in FIG. 1 by a dashed box. The structural design of the control circuit 6 will be discussed in more detail below.
  • the control circuit 6 is arranged in operative connection to the ultrasonic generator 2 and will preferably be integrated with it in a common housing and thus form part of the ultrasonic generator 2, which is not explicitly shown in the figures.
  • the control circuit 6 initially comprises those elements as components of a power control loop, which are familiar to the skilled person from previously known Ultraschallaf Iuzen. These are measuring means 6a for determining the actual power of the ultrasonic generator 2, which measuring means 6a for determining the actual generator power are in signaitic operative connection with an output of an ultrasonic generator 2.
  • the previously known power control loop comprises default means 6b for the reference variable of the control loop in the form of the generator soil power.
  • the outputs of the measuring means 6a and the presetting means 6b are combined at an addition part 6c, which addition point 6c in turn is connected to the actual power regulator 6d.
  • This power regulator 6d is connected via its output signal technically with a corresponding control input of the ultrasonic generator 2, so that there is a closed loop, which is known per se to those skilled in the art, so that in this case does not need to be discussed in detail.
  • the present invention further forms the object described above, known per se, by providing within the control circuit 6 further elements, which are explained below:
  • control circuit 6 further comprises temperature measuring means 6e, which are designed or arranged to determine the temperature (operating temperature) T of the Uitraschallschwingers 3, which in the figures by a long symbolized by dashed line.
  • the temperature measuring means 6e are signaitically linked via a further addition point 6f with presetting means 6g for a temperature threshold value.
  • Downstream of the addition point 6f are multiplying means 6h whose inputs are linked, on the one hand, to the said addition point 6f and, on the other hand, to the default output power setting means 6b.
  • Downstream of the last-mentioned addition point 6i is the initially mentioned first addition point 6c of the power control loop, whose arrangement has already been explicitly explained within the power control loop.
  • control circuit 6 framed by a dot-dash box, that is to say the addition point 6i, the presetting means 6b and the multiplier means 6h and the associated signal-technical connections can also be functionally referred to as power modifying means 6 'in their entirety.
  • power modifying means 6 The course of the dot-dash line across the target power setting means 6b makes it clear that these command means 6b are also regularly provided as a command means for the command value even in a conventional ultrasonic apparatus having a conventional control circuit. In the context of the present invention, however, they perform a dual function, which will be discussed in more detail below.
  • the ultrasound device 1 shown in FIG. 1 operates as follows:
  • the ultrasound generator 2 supplies electrical power to the ultrasound transducer 3, which is excited in accordance with the emission of ultrasound waves and couples them into the medium 5 contained in the container 4.
  • the actual power supplied by the ultrasonic generator 2 to the ultrasonic oscillator 3 is also designated as a control variable in terms of control technology and therefore carries both the reference symbol IL and the reference symbol RG in FIG.
  • the current actual power IL is measured by the measuring means 6a, and the corresponding signal I LS is fed via the addition point 6i to the addition point 6c, where, in a manner known per se, a connection is made to the desired power SL provided by the presetting means 6b, wherein the logic signal is fed as a so-called control deviation RA to the controller 6d, which corresponds to a speaking manipulated variable SG outputs, which is used for control technical action on the ultrasonic generator 2.
  • the ultrasonic generator 2 can be controlled so that the actual power IL supplied to the ultrasonic vibrator 3 substantially corresponds to the predetermined target power SL.
  • the current operating temperature T of the ultrasound oscillator 3 is determined by the temperature measuring means 6e.
  • a corresponding temperature signal TS is applied to the (+) input of the addition point 6f.
  • the combination or a comparison with a temperature reference value REF is provided, which is provided by the default means 6g.
  • a modified temperature signal TS ' is produced which, depending on the position of the temperature threshold REF and in dependence on the measured temperature T, indicates whether the measured temperature T is below or above the temperature threshold REF (or just corresponds to it).
  • the said modified temperature signal TS ' is multiplied by the multiplier 6h with the target power SL provided by the default means 6b or a corresponding desired power value or signal! multiplied.
  • the result of this multiplication is a change signal VS, which is passed to the addition point 6i.
  • the said forwarding takes place, however, only if the following applies to the change signal: VS 0.
  • the change signal VS depends on the one hand via the signal TS from the measured temperature T of the ultrasound oscillator 3 and on the other hand is proportional to the soli power SL.
  • This change signal VS is then added at the addition point 6i to the actual power signal ILS, so that a modified actual power signal! ILS ', which is then passed to the addition point 6c instead of the actual power signal I LS.
  • the power control loop of the ultrasonic generator 2 will react to this apparently increased actual power ILS and thus indirectly compensate for a temperature increase in the Uitraschallschwinger 3 on the temperature threshold REF addition, if necessary, the Uitraschallschwinger 3 supplied power RG / 1 L adjusted or reduced. In this way, damage or even destruction of the ultrasonic vibrator 3 can be avoided by overheating.
  • FIG. 2 schematically shows, by means of a block diagram, another embodiment of the ultrasonic apparatus according to the invention, wherein only the essential differences from the embodiment according to FIG. 1 are to be discussed in more detail below.
  • Deviations from the embodiment according to FIG. 1 can be found in FIG. 2 in the area of the power modifying agent 6 ", which in the present case comprises only the preselecting means 6b for the desired power as well as mixing means 6j, reference being made to the relevant reference to FIG. 1 with respect to the presetting means 6b.
  • the measuring means 6a for the actual power in a conventional manner in conjunction with the addition point 6c and further with the controller 6d in operative connection, so that it is not discussed further here ..
  • the default means 6b for the target power SL or a corresponding Target power signals are also operatively connected to the addition parts 6c and the controller 6d via the multipliers 6j already mentioned .
  • the multiplier 6j is provided with the modified temperature signal TS 'already described comprehensively with reference to FIG. 1 or a signal derived therefrom, which according to the embodiment in Figure 2 as a change signal VS acts.
  • the operation of the circuit arrangement according to FIG. 2 thus involves a change in the desired power SL or the corresponding desired power signal by multiplication with the change signal VS in order to provide a modified soli power signal SL 'at the addition point 6c.
  • Whether an increase or a decrease in the setpoint power takes place in terms of control engineering depends in each case on the result of the temperature measurement: If the measured temperature value (symbolized by the signal TS) exceeds the temperature threshold REF, the setpoint power is reduced multiplicatively and the actual power is readjusted in a conventional manner in order to avoid temperature-induced damage to the ultrasonic vibrator 3. If, conversely, the measured temperature TS again drops below the reference peak REF, a multiplicative increase of the nominal power with subsequent readjustment of the actual power takes place in order to operate the ultrasonic oscillator 3 again with increased power.
  • multiplicative adaptation of the desired power by the multiplier 6j can be linear or non-linear as a function of the current oscillator temperature.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)

Abstract

L'invention concerne un procédé permettant de faire fonctionner un appareil à ultrasons (1), ledit appareil à ultrasons (1) comprenant au moins un oscillateur à ultrasons (3) et au moins un générateur d'ultrasons (2), ledit oscillateur à ultrasons (3) étant amené par le générateur d'ultrasons (2) à osciller sous l'effet d'une excitation. Ledit procédé se caractérise par le fait que durant l'utilisation de l'appareil à ultrasons (1), une température (T) de l'oscillateur à ultrasons (3) est déterminée et qu'une puissance fournie par le générateur d'ultrasons (2) à l'oscillateur à ultrasons (3) est modifiée en fonction de la température (T) déterminée, une modification d'une grandeur réelle (IL,ILS) et/ou d'une grandeur théorique (SL) du circuit de régulation étant réalisée dans un circuit de régulation du générateur d'ultrasons (2). L'invention concerne en outre un circuit de régulation (6) pour un appareil à ultrasons (1) et un appareil à ultrasons (1) adapté à la mise en œuvre du procédé.
EP12742820.9A 2011-07-21 2012-07-10 Circuit de régulation et procédé permettant de faire fonctionner un appareil à ultrasons Withdrawn EP2734384A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011108163A DE102011108163A1 (de) 2011-07-21 2011-07-21 Regelungsschaltung und Betriebsverfahren für ein Ultraschallgerät
PCT/EP2012/063467 WO2013010850A2 (fr) 2011-07-21 2012-07-10 Circuit de régulation et procédé permettant de faire fonctionner un appareil à ultrasons

Publications (1)

Publication Number Publication Date
EP2734384A2 true EP2734384A2 (fr) 2014-05-28

Family

ID=46603893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12742820.9A Withdrawn EP2734384A2 (fr) 2011-07-21 2012-07-10 Circuit de régulation et procédé permettant de faire fonctionner un appareil à ultrasons

Country Status (3)

Country Link
EP (1) EP2734384A2 (fr)
DE (1) DE102011108163A1 (fr)
WO (1) WO2013010850A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN119972635B (zh) * 2025-02-11 2026-04-28 宜昌中威清洗机有限公司 一种悬挂链清洗机的超声功率控制方法及系统

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US4482798A (en) * 1982-11-15 1984-11-13 The Budd Company Automatic electric welding system for maintaining uniform heat in a welding operation
DE4020704C1 (fr) * 1990-06-29 1991-11-28 G.M. Pfaff Ag, 6750 Kaiserslautern, De
GB2265845B (en) * 1991-11-12 1996-05-01 Medix Ltd A nebuliser and nebuliser control system
WO1996034567A1 (fr) * 1995-05-02 1996-11-07 Heart Rhythm Technologies, Inc. Systeme permettant de commander l'energie appliquee a un patient en vue d'une ablation
IT1277427B1 (it) * 1995-08-03 1997-11-10 Miat Spa Apparecchio aerosol ad ultrasuoni
GB2435133A (en) * 2006-02-08 2007-08-15 Dyson Technology Ltd Agitation source controller
GB2442021A (en) * 2006-09-21 2008-03-26 Dyson Technology Ltd Controlling the power supplied to a high frequency agitator
DE202009017841U1 (de) * 2009-10-16 2010-07-29 Becker, Reinhard Ultraschallbehandlungsgerät

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Also Published As

Publication number Publication date
DE102011108163A1 (de) 2013-01-24
WO2013010850A3 (fr) 2013-08-15
WO2013010850A2 (fr) 2013-01-24

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