DE2548264A1 - ELECTRIC OSCILLATOR - Google Patents

ELECTRIC OSCILLATOR

Info

Publication number
DE2548264A1
DE2548264A1 DE19752548264 DE2548264A DE2548264A1 DE 2548264 A1 DE2548264 A1 DE 2548264A1 DE 19752548264 DE19752548264 DE 19752548264 DE 2548264 A DE2548264 A DE 2548264A DE 2548264 A1 DE2548264 A1 DE 2548264A1
Authority
DE
Germany
Prior art keywords
oscillator
electrical
phase
control signal
frequency
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.)
Pending
Application number
DE19752548264
Other languages
German (de)
Inventor
Hans Dipl Ing Kaercher
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
Original Assignee
Siemens AG
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 filed Critical Siemens AG
Priority to DE19752548264 priority Critical patent/DE2548264A1/en
Publication of DE2548264A1 publication Critical patent/DE2548264A1/en
Pending 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
    • 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
    • B06B1/0261—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal taken from a transducer or electrode connected to the driving transducer
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C1/00—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design
    • A61C1/02—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools
    • A61C1/07—Dental machines for boring or cutting ; General features of dental machines or apparatus, e.g. hand-piece design characterised by the drive of the dental tools with vibratory drive, e.g. ultrasonic
    • 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
    • B06B2201/76—Medical, dental

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Description

Elektrischer Oszillator Electric oscillator

Der im Anspruch 1 angegebenen Erfindung liegt die Aufgabe zugrunde, einen elektrischen Oszillator für den Antrieb eines piezoelektrischen Schwingers eines zahnärztlichen Ultraschallhandstückes anzugeben, der stets in der Resonanzfrequenz des Schwingers und unabhängig von der Amplitude einer Rückkopplungsspannelg arbeitet und der keine Anschwinghjlie benötigt.The invention specified in claim 1 is based on the object an electric oscillator for driving a piezoelectric oscillator of a dental ultrasonic handpiece, which is always in the resonance frequency of the oscillator and works independently of the amplitude of a feedback voltage and which does not need an Schwinghjlie.

Vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung sind in den Unteransprüchen beschrieben.Advantageous further developments and refinements of the invention are described in the subclaims.

Ein Ausführungsbeispiel der Erfindung wird anhand der Figur näher erläutert.An embodiment of the invention is explained in more detail with reference to the figure explained.

Ein freilauf ender Oszillator 1 treibt über einen Leis+ungsverstärker 2 einen Keramikschwinger 3 an. Mit diesem fest verbunden ist ein Rückkopplungsplättchen 4. Die vom Schwinger 3 gelieferte Schwingung wird in einem Phasenkomparator 5 mit der Oszillatorschwingung in bezug.auf die Phasenlage verglichen.A free-running oscillator 1 drives a power amplifier 2 a ceramic transducer 3. A feedback plate is firmly connected to this 4. The oscillation supplied by the oscillator 3 is included in a phase comparator 5 the oscillator oscillation in relation to the phase position.

Weicher die beiden Signale in der Phasenlage voneinander ab, so gibt der Phasenkomparator 5 eine Spannung ab, deren Höhe sron der Phasenverschiebung abhängt. Mit dieser Spannung wird der Oszillator so lange nachgesteuert, bis Oszillatorsignal und Rückkopplungssignal in Frequenz und Phase übereinstimmen, d.h. bis der Oszillator durch die Rückkopplungsspannung synchroni;iert ist. Bei gleichen Signalen gibt der Phasenkcul?arator die halbe Betriebsspannung ab, die bezüglich einer Phasennachstimmung unbedeutend klein ist.If the phase position of the two signals differs from one another, then there is the phase comparator 5 from a voltage, the level of which sron the phase shift depends. The oscillator is controlled with this voltage until the oscillator signal and feedback signal match in frequency and phase, i.e. until the oscillator is synchronized by the feedback voltage. If the signals are the same, the Phasenkcul? Arator from half the operating voltage, which is related to a phase adjustment is insignificantly small.

Vorteile den vorbeschriebenen Oszillators sind, daß der Generator infolge des freilaufenden Oszillators immer schwingt und er unabhängig von der Amplitude der Rückkopplungsspannung ist.Advantages of the oscillator described above are that the generator as a result of the free-running oscillator always oscillates and he independent on the amplitude of the feedback voltage.

Eine Anschwinghilfe entfällt somit. Ändert sich bei mechanischer Bedämpfung des Schwingers 3 dessen Resonanzfrequenz, -so wird der Oszillator 1 durch die Rückkopplung auf die neue Resonanzfrequenz gezogen. Der Schwinger 3 wird also immer in der Resonanzfrequenz betrieben.An oscillation aid is therefore not required. Changes with mechanical damping of the oscillator 3 whose resonance frequency, -so the oscillator 1 is due to the feedback pulled to the new resonance frequency. The oscillator 3 is always in the resonance frequency operated.

L e e r s e i t eL e r s e i t e

Claims (4)

Patentansprüche 0 Elektrischer Oszillator für die Anregung eines piezoelektrischen Schwingers eines zahnärztlichen Ultraschallhandstückes, g e k e n n z e i c h n e t d u r c h einen mit dem Schwinger (3) mechanisch gekuppelten Rückkopplungsplättchen (4) aus Schwingermaterial, mit Elektroden, an denen ein der Schwingungsfrequenz des Rückkopplungsplättchens entssrechendes elektrisches Signal abgenommen wird, einen Phasenkomparator (5), der einerseits mit dem Oszillator (1) und andererseits mit wenigstens einer Elektrode des Rückkopplungsplättchens verbunden ist, und der in Abhängigkeit von der Phasendifferenz der vom Oszillator und vom Schwingerpf.attchel, gelieferten elektrischen Schwingungen ein Steuersignal an in Oszillator abgibt, welches die Frequenz des Oszillators im Sinne einer Abstimmung der beiden Schwingungen in Frequenz und Phase beeinflußt. Claims 0 Electric oscillator for the excitation of a piezoelectric oscillator of a dental ultrasonic handpiece, g e k E n n g e i n e t d u r c h a mechanically coupled with the transducer (3) Feedback plate (4) made of oscillating material, with electrodes on which one of the Electrical signal corresponding to the oscillation frequency of the feedback plate is removed, a phase comparator (5), which on the one hand with the oscillator (1) and on the other hand connected to at least one electrode of the feedback plate is, and depending on the phase difference of the oscillator and the Schwingerpf.attchel, supplied electrical vibrations a control signal to in Oscillator emits which the frequency of the oscillator in terms of a vote the two oscillations in frequency and phase influenced. 2. Elektrisches Oszillator nach Anspruch 1, dadurch gekennzeichnet, daß als Oszillator (1) ein spannungsgesteuerter Oszillator benutzt ist. 2. Electrical oscillator according to claim 1, characterized in that that a voltage-controlled oscillator is used as the oscillator (1). 3. Elektrischer Oszillator nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Phasenkomparator (5) ein Steuersignal abgibt, das bei großer Phasendifferenz groß und bei Phasenübereinstimmung unbedeutend klein ist. 3. Electrical oscillator according to claim 1 or 2, characterized in that that the phase comparator (5) emits a control signal which, when the phase difference is large is large and insignificantly small if the phases match. 4. Elektrischer Oszillator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Phasenkomparator (5) als Steuersignal eine elektrische Spannung liefert. 4. Electrical oscillator according to one of claims 1 to 3, characterized characterized in that the phase comparator (5) is an electrical voltage as a control signal supplies.
DE19752548264 1975-10-28 1975-10-28 ELECTRIC OSCILLATOR Pending DE2548264A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19752548264 DE2548264A1 (en) 1975-10-28 1975-10-28 ELECTRIC OSCILLATOR

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752548264 DE2548264A1 (en) 1975-10-28 1975-10-28 ELECTRIC OSCILLATOR

Publications (1)

Publication Number Publication Date
DE2548264A1 true DE2548264A1 (en) 1977-05-05

Family

ID=5960296

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752548264 Pending DE2548264A1 (en) 1975-10-28 1975-10-28 ELECTRIC OSCILLATOR

Country Status (1)

Country Link
DE (1) DE2548264A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492280A1 (en) * 1980-10-16 1982-04-23 Sormel Sa Vibration controller for part selecting bowl - uses detected bowl vibrating frequency to control switching amplifier driving vibrator at bowl natural frequency
EP0294548A1 (en) * 1987-04-21 1988-12-14 Dentsply International, Inc. Single multi-function handpiece for dental instruments
DE102012102791A1 (en) * 2011-11-24 2013-05-29 Htc Corporation Electronic device and its adaptation method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2492280A1 (en) * 1980-10-16 1982-04-23 Sormel Sa Vibration controller for part selecting bowl - uses detected bowl vibrating frequency to control switching amplifier driving vibrator at bowl natural frequency
EP0294548A1 (en) * 1987-04-21 1988-12-14 Dentsply International, Inc. Single multi-function handpiece for dental instruments
EP0454188A2 (en) * 1987-04-21 1991-10-30 Dentsply International Switching circuit in a dental handpiece
EP0454188A3 (en) * 1987-04-21 1992-02-12 Dentsply International Single multi-function hand piece for dental instruments
DE102012102791A1 (en) * 2011-11-24 2013-05-29 Htc Corporation Electronic device and its adaptation method
DE102012102791B4 (en) * 2011-11-24 2013-08-22 Htc Corporation Electronic device and its adaptation method
US8659207B2 (en) 2011-11-24 2014-02-25 Htc Corporation Electronic device and adjustment method thereof

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