WO1997034127A1 - Dispositif pour detecter la vitesse de rotation d'un moteur electrique - Google Patents

Dispositif pour detecter la vitesse de rotation d'un moteur electrique Download PDF

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Publication number
WO1997034127A1
WO1997034127A1 PCT/DE1996/002288 DE9602288W WO9734127A1 WO 1997034127 A1 WO1997034127 A1 WO 1997034127A1 DE 9602288 W DE9602288 W DE 9602288W WO 9734127 A1 WO9734127 A1 WO 9734127A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
motor
receiver
armature
arrangement according
Prior art date
Application number
PCT/DE1996/002288
Other languages
German (de)
English (en)
Inventor
Wolfgang Reeb
Roland Schmidt
Peter-Josef Bauer
Barbara Spengler
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO1997034127A1 publication Critical patent/WO1997034127A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/342—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells the sensed object being the obturating part
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors

Definitions

  • the invention is based on an arrangement for detecting the
  • Rotation of an electric motor which contains a rotatable armature, the detection being carried out by detection by means of a light barrier in cooperation with light transmitter and light receiver, which is defined in the preamble of claim 1
  • 35 light receiver generated pulse series is proportional to the
  • Angular speed of the motor and is used to regulate the rotational speed of the motor.
  • a special slotted disc is required to detect the engine revolution.
  • a basically similar arrangement is known from DE 42 17 557 AI.
  • a light barrier is provided for the detection of the micro steps of a micro step control of a step motor. This is achieved by means of a reticle, a light source on one side and a light receiver on the other side of the reticle.
  • the reticle is designed separately and attached to the shaft of the stepper motor outside of its housing.
  • This known graticule must be provided in a confined space with a large number of line-shaped passages for the light, which in addition to the fact of a separate slice, he orders a graticule of enormous precision.
  • the arrangement according to the invention for detecting the rotation of an electric motor, which contains a rotatable armature, with the characterizing features of claim 1 has the advantage that no separate perforated or line plate is required as a light barrier on the shaft of the motor. As a result, the structure is significantly simplified and the effort is considerably reduced.
  • the armature of the motor is used as a pinhole-type light barrier and the light transmitter and light receiver are arranged together with the armature so that they can be operated as a transmitted light probe for detecting the rotation of the motor.
  • the light transmitter and light receiver are arranged within the motor. This enables complete encapsulation of the motor and detection device, which is completely shielded from external influences.
  • light transmitters and / or light receivers are arranged outside the motor and openings for light transmitters or light receivers are provided in one or both end walls of the motor.
  • a light-emitting diode is provided as the light transmitter and / or a photodiode or a phototransistor is provided as the light receiver.
  • the motor of the arrangement designed according to the invention is operated as a servomotor.
  • the motor is operated at a relatively high number of revolutions, in particular approximately 3000 revolutions / minute, and is effective on the actuator via a gear. According to an advantageous embodiment of the invention, this can be used for digital distance detection of the actuator.
  • the armature used as a pinhole-like light barrier generates one pulse per lamella groove.
  • Fig. 2 in plan view of an engine front of the engine shown in Fig. 1, the arrangement according to the invention with the elements forming the transmitted light probe anchor as a pinhole, light transmitter and light receiver.
  • an electric motor 1 with the arrangement according to the invention is shown in side view, partially in section.
  • the motor 1 can be a direct current motor which is excited by a permanent magnet 2.
  • An armature 3 is rotatably arranged on a shaft 4 in the motor 1.
  • a gearwheel 5 can be mounted on the shaft 4, which drives an actuator (not shown) directly or via a gear (also not shown in detail).
  • the engine 1 can be operated, for example, at a relatively high speed of approximately 3000 revolutions / minute.
  • FIG. 2 shows a top view of an engine front side of the engine 1 shown in FIG. 1, the arrangement according to the invention with the elements armature 3 forming a transmitted light probe as a pinhole, light transmitter 6 and light receiver 7.
  • the armature 3 has lamellae 8 and windings 9. A lamella groove 10 is present between the individual lamellae 8.
  • the light transmitter 6 and the light receiver 7 are each arranged so that when a lamella groove 10 passes in front of the light receiver 7, light from the light transmitter 6 falls on it. This creates a light pulse in the light receiver 7 for each lamella groove 10.
  • the light transmitter 6 is arranged on a circuit board 16 and the light receiver 7 on a circuit board 17. Both parts are arranged outside the engine 1 and outside of its end walls 11 and 12, respectively. Openings 13 and 14 are provided in the end walls 11 and 12 through which light can enter or light can exit in alignment with the lamella grooves 10.
  • the arrangement according to the invention allows the revolutions of electric motors to be detected without a separate reticle with a very simple construction.
  • the pulses generated can be evaluated at low cost.
  • a high level of reliability and accuracy can be achieved and also the detection of overtravel paths is made possible.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

L'invention concerne un dispositif comprenant un induit (3), sous forme de barrière photoélectrique du type diaphragme à trou, d'un moteur électrique (1), un photoémetteur (6) et un photorécepteur (7), ledit dispositif formant une sonde à lumière transmise pour détecter la vitesse de rotation du moteur. Le photoémetteur se trouve sur un côté de l'induit et le photorécepteur sur l'autre. L'induit présente des lamelles (8) et des enroulements (9). Une rainure (10) est présente entre chaque lamelle et chaque enroulement. Le photoémetteur et le photorécepteur sont disposés par rapport à cette rainure de sorte que lorsqu'une rainure passe devant le photorécepteur, la lumière frappe ce dernier, créant ainsi une impulsion lumineuse par rainure. Si le moteur est utilisé en tant que servomoteur conjointement avec un actionneur, le dispositif selon l'invention peut servir également de façon avantageuse pour la détection numérique de position et de distance.
PCT/DE1996/002288 1996-03-13 1996-11-29 Dispositif pour detecter la vitesse de rotation d'un moteur electrique WO1997034127A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19609817.3 1996-03-13
DE1996109817 DE19609817A1 (de) 1996-03-13 1996-03-13 Anordnung zur Erfassung der Umdrehung eines elektrischen Motors

Publications (1)

Publication Number Publication Date
WO1997034127A1 true WO1997034127A1 (fr) 1997-09-18

Family

ID=7788134

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/002288 WO1997034127A1 (fr) 1996-03-13 1996-11-29 Dispositif pour detecter la vitesse de rotation d'un moteur electrique

Country Status (2)

Country Link
DE (1) DE19609817A1 (fr)
WO (1) WO1997034127A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19820630A1 (de) * 1998-05-08 1999-11-11 Heidelberger Druckmasch Ag Vorrichtung zur Positionserfassung von rotierenden Objekten
FR2849500B1 (fr) * 2002-12-31 2005-04-01 Ier Dispositif de controle de la position d'une piece mecanique par rapport a une reference fixe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5658766A (en) * 1979-10-19 1981-05-21 Brother Ind Ltd Flat-type dc motor with encoder
JPS63206173A (ja) * 1987-02-19 1988-08-25 Nikon Corp 超音波モ−タ
FR2691854A1 (fr) * 1992-05-27 1993-12-03 Sextant Avionique Moteur à courant continu à rotor bobine et à capteur de position angulaire intégré.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1432674A (en) * 1972-04-14 1976-04-22 Automated Energy Systems Inc Adjusting energy systems
DE4217557A1 (de) * 1992-05-27 1993-12-02 Bosch Gmbh Robert Kontrollierte Mikroschrittsteuerung für einen Schrittmotor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5658766A (en) * 1979-10-19 1981-05-21 Brother Ind Ltd Flat-type dc motor with encoder
JPS63206173A (ja) * 1987-02-19 1988-08-25 Nikon Corp 超音波モ−タ
FR2691854A1 (fr) * 1992-05-27 1993-12-03 Sextant Avionique Moteur à courant continu à rotor bobine et à capteur de position angulaire intégré.

Also Published As

Publication number Publication date
DE19609817A1 (de) 1997-09-18

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