DE876171C - Device for determining the exact speed or changes in speed of a shaft - Google Patents

Device for determining the exact speed or changes in speed of a shaft

Info

Publication number
DE876171C
DE876171C DEA5165D DEA0005165D DE876171C DE 876171 C DE876171 C DE 876171C DE A5165 D DEA5165 D DE A5165D DE A0005165 D DEA0005165 D DE A0005165D DE 876171 C DE876171 C DE 876171C
Authority
DE
Germany
Prior art keywords
speed
encoder
shaft
coupling
determining
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
Application number
DEA5165D
Other languages
German (de)
Inventor
Wilhelm Dipl-Ing Wuerth
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Priority to DEA5165D priority Critical patent/DE876171C/en
Application granted granted Critical
Publication of DE876171C publication Critical patent/DE876171C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01P3/56—Devices characterised by the use of electric or magnetic means for comparing two speeds

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Description

Will man die Drehzahl einer Welle in jedem Zeitmonient''seh'r genau'messen, so macht dies bekanntlich erhebliche Schwierigkeiten wegen der nie zu vermeidenden Exzentrizität bei der Ankupplung von Drehzahlgebern an die Welle, deren Drehzahl gemessen werden soll. Die ungleichförmige von der Exzentrizität der Ankupplung herrührende Anzeige bei Gebermaschinen tritt sowohl bei der Ankupplung über Zahnräder als auch bei direkter Ankupplung auf. If you want to measure the speed of a shaft precisely in every month of time, so, as is well known, this creates considerable difficulties because of the difficulties that can never be avoided Eccentricity when coupling speed sensors to the shaft, their speed should be measured. The non-uniformity resulting from the eccentricity of the coupling In the case of encoder machines, display occurs both when coupling via gears and with direct coupling.

Die Einrichtung nach der Erfindung vermeidet diesen Nachteil dadurch, daß zu der Anzeige einer Gebermaschine die Anzeige einer zweiten Geber maschine addiert bzw. von dieser Anzeige subtrahiert wird, so daß sich die Oberwelligkeit der Anzeigen, herrührend von der Exzentrizität der Ankupplung, gerade aufhebt. The device according to the invention avoids this disadvantage in that that to the display of a donor machine the display of a second donor machine is added or subtracted from this display, so that the ripple of the displays, due to the eccentricity of the coupling, just cancel.

Die praktische Ausführung des Erfindungsgedankens soll an Hand eines Beispiels. gezeigt werden. Fig. I zeigt idie Welle W, deren Drehzahl gemessen werden soll. G1 sei die Gebermaschine, die mit der Exzentrizität Ej an die Hauptwelle W angekuppelt sei. Erfindungsgemäß wird nun an die Gebermaschine G1 eine weitere Gebermaschine G2 absichtlich mit einer größeren Exzentrizität E2-Et angekuppelt. Die Absolutwerte der Anzeigen der beiden Gebermaschinen werden nun so gewählt, daß der Absolutwert der Anzeige Ider Maschine mit der großen Exzentrizität klein. ist gegenüber dem der Maschine mit der kleinen Exzentrizität. Um die Oberwelligkeiten'der bei-den Gebermaschinen phasenmäßig zum Abgleich bringen zu können, muß die Ankupplung zwischen dem Geber Gs und G2 winkelmäßig verstellbar sein. Man hat - nun zwei Möglichkeiten des Abgleichs: I. Man wählt die Einstellung durch die Kupplung so, daß ,die Exzentrizitäten nach der gleichen Seite abweichen; dann hat -man die Anzeigen der beiden Geber zu subtrahieren. The practical implementation of the concept of the invention should be based on one Example. to be shown. Fig. I shows the shaft W, the speed of which is measured target. Let G1 be the encoder machine that is connected to the main shaft W with eccentricity Ej is coupled. According to the invention, a further encoder machine is now attached to the encoder machine G1 G2 intentionally coupled with a greater eccentricity E2-Et. The absolute values the displays of the two encoder machines are now selected so that the absolute value the display of the machine with the large eccentricity is small. is opposite to that the machine with the small eccentricity. About the ripples of the two To be able to bring encoder machines phase-wise to the synchronization, the coupling between the encoder Gs and G2 be adjustable in angle. You now have two options of the adjustment: I. One selects the setting by the coupling so that, the eccentricities deviate on the same side; then you have to close the displays of the two encoders subtract.

2. Man wählt die Einstellung durch die Kupplung so, daß die Exzentrizitäten gebeneinander gerichtet sind. Dann hat man die Anzeigen der beiden Geber zu addieren. 2. One chooses the setting by the coupling so that the eccentricities are directed towards each other. Then you have to add the displays of the two encoders.

In beiden Fällen sind dann nur noch die Absolutgrößen der Mittelwerte der Anzeige der beiden Geber abzugleichen. In both cases there are only the absolute values of the mean values to match the display of the two encoders.

Fig. 2 zeigt im Diagramm die Anzeigen beider Gebermaschinen abhängig von der Zeit für den Fall, daß die beiden Exzentrizitäten nach der gleichen Seite gerichtet sind. Als resultierende Anzeige ergibt sich dann A als Differenz der beiden Einzelanzeigen. Fig. 2 shows in a diagram the displays of both donor machines of the time in the event that the two eccentricities are on the same side are directed. The resulting display is then A as the difference between the two Individual advertisements.

Fig. 3 zeigt im Diagramm die Anzeigen beider Gebermaschinen abhängig von der Zeit für den Fall, daß die bei'den Exzentrizitäten gegeneinander gerichtet sind. Als resultierende Anzeige ergibt sich dann 24 als Summe der beiden Einzelanzeigen. Fig. 3 shows in a diagram the displays of both donor machines of the time in the event that the two eccentricities are directed against one another are. The resulting display is then 24 as the sum of the two individual displays.

4 ist die Anzeige des Gebers mit der kleinen Exzentrizität, A2 ist die Anzeige des Gebers mit der großen Exzentrizität.4 is the display of the encoder with the small eccentricity, A2 is the display of the encoder with the large eccentricity.

Es ist schon vorgeschlagen worden, mit einer Welle mehrere Drehzahlgebermaschinen zu kuppeln, damit Störungen der Anzeige vermieden werden. It has already been proposed to use several speed encoder machines with one shaft to be coupled in order to avoid disturbances of the display.

Claims (2)

PATENTANSPRUCHE: I, Einrichtung zur Ermittlung der Drehzahl oder Drebzahländerungen umlaufender Wellen mit zwei elektrischen Drehzahlgebermaschinen, -dadurch gekennzeichnet, daß mit der ersten, an die Welle angeschlossenen Gebermaschine eine zweite Gebermaschine Iderart gekoppelt ist, daß bei Addition bzw. Subtraktion der Anzeigen beilder die durch die Exzentrizität der Ankupplung auftretenden Oberwellen gegeneinander aufgehoben werden. PATENT CLAIMS: I, device for determining the speed or Speed changes of rotating shafts with two electric speed encoder machines, -characterized in that with the first encoder machine connected to the shaft a second encoder machine Iderart is coupled that with addition or subtraction the displays show the harmonics caused by the eccentricity of the coupling are canceled against each other. 2. Einrichtung nach Anspruch I, dadurch gekennzeichnet, daß die Ankupplung beider Gebermaschinen winkelmäßig verstellbar ist. 2. Device according to claim I, characterized in that the coupling both encoder machines is adjustable in angle.
DEA5165D 1942-10-20 1942-10-20 Device for determining the exact speed or changes in speed of a shaft Expired DE876171C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA5165D DE876171C (en) 1942-10-20 1942-10-20 Device for determining the exact speed or changes in speed of a shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA5165D DE876171C (en) 1942-10-20 1942-10-20 Device for determining the exact speed or changes in speed of a shaft

Publications (1)

Publication Number Publication Date
DE876171C true DE876171C (en) 1953-05-11

Family

ID=6920640

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA5165D Expired DE876171C (en) 1942-10-20 1942-10-20 Device for determining the exact speed or changes in speed of a shaft

Country Status (1)

Country Link
DE (1) DE876171C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1183725B (en) * 1962-09-28 1964-12-17 Licentia Gmbh Arrangement to reduce the ripple of the output voltage of tachometer machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1183725B (en) * 1962-09-28 1964-12-17 Licentia Gmbh Arrangement to reduce the ripple of the output voltage of tachometer machines

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