DE9216703U1 - Arrangement for detecting the position of rotating shafts - Google Patents
Arrangement for detecting the position of rotating shaftsInfo
- Publication number
- DE9216703U1 DE9216703U1 DE9216703U DE9216703U DE9216703U1 DE 9216703 U1 DE9216703 U1 DE 9216703U1 DE 9216703 U DE9216703 U DE 9216703U DE 9216703 U DE9216703 U DE 9216703U DE 9216703 U1 DE9216703 U1 DE 9216703U1
- Authority
- DE
- Germany
- Prior art keywords
- teeth
- arrangement
- sensor
- detecting
- rotating shafts
- 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 - Lifetime
Links
- 238000011156 evaluation Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/077—Circuits therefor, e.g. pulse generators
- F02P7/0775—Electronical verniers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/067—Electromagnetic pick-up devices, e.g. providing induced current in a coil
- F02P7/07—Hall-effect pick-up devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/30—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring angles or tapers; for testing the alignment of axes
-
- 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
- G01D5/12—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 using electric or magnetic means
- G01D5/14—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 using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—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 using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
-
- 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
- G01D5/12—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 using electric or magnetic means
- G01D5/14—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 using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—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 using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/147—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 using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
&iacgr;&ogr; &iacgr;&ogr;
Anordnunq zur Erfassunq der Position rotierender WellenArrangement for detecting the position of rotating shafts
Die Erfindunq betrifft eine Anordnunq zur Erfassunq der Position rotierender Wellen, bestehend ausThe invention relates to an arrangement for detecting the position of rotating shafts, consisting of
- einem Sensor und- a sensor and
- einem Geber, dem der Sensor räumlich zugeordnet ist.- a transmitter to which the sensor is spatially assigned.
Bekannt ist eine Anordnunq zur Erfassunq der Position rotierender Wellen, bei der qeqenüber einem Zahnrad als Geber ein Permanentmaqnet als induktiver Sensor positioniert ist. Dieser Permanentmaqnet hält einen maqnetischen Fluß im maqnetischen Kreis aufrecht. Die Größe des maqnetischen Flusses hänqt von der Enerqiedichte und der Dimensionierunq des Maqneten sowie dem Maßabschnitt im maqnetischen Kreis ab. Eine Reduzierunq des Luftspaltes zwischen den Polkernen des induktiven Gebers und den Impulsen des Zahnrades reduziert damit diesen Abschnitt und läßt den maqnetischen Fluß anwachsen. Hierdurch wird eine Spannunq induziert, in die ein Maß für die Umdrehunq des Zahnrades bzw. einer dieses tragende Welle ist.A known arrangement for detecting the position of rotating shafts is one in which a permanent magnet is positioned as an inductive sensor above a gear as a sensor. This permanent magnet maintains a magnetic flux in the magnetic circuit. The size of the magnetic flux depends on the energy density and the dimensions of the magnet as well as the section in the magnetic circuit. A reduction in the air gap between the pole cores of the inductive sensor and the pulses of the gear reduces this section and allows the magnetic flux to increase. This induces a voltage which is a measure of the rotation of the gear or of a shaft supporting it.
Nachteiliq ist, daß sich mit solchen induktiven Gebern keine Position der Welle bei Drehzahlen nahe null Umdrehunqen pro Minute erfassen läßt.The disadvantage is that such inductive sensors cannot detect the position of the shaft at speeds close to zero revolutions per minute.
Bekannt ist weiterhin ein Hall-Sensor-IC, das nach dem Differenzprinzip die Bewequnq zweier unterschiedlichen Positionen feststellt. Gemessen wird dabei die Differenz der Flußdichte des maqnetischen Feldes. Das daraus qewonnene Siqnal wird entsprechend aufbereitet.A Hall sensor IC is also known that uses the difference principle to determine the movement of two different positions. The difference in the flux density of the magnetic field is measured. The resulting signal is processed accordingly.
Dieses Differenzprinzip hat allerdinqs den Nachteil, daß, wenn keine Differenz für das Hall-Sensor-IC er-However, this difference principle has the disadvantage that if no difference is created for the Hall sensor IC,
1^ scheint, das Siqnal nicht definiert ist. Das ist sowohl für eine Lücke als auch für einen ausqedehnten Zahn der Fall und führt dazu, daß eine qenaue Positionserkennunq mit dem Hall-Sensor-IC nicht möqlich ist. 1 ^ appears that the signal is not defined. This is the case for both a gap and an extended tooth and means that precise position detection with the Hall sensor IC is not possible.
Der Erfindunq lieqt die Aufqabe zuqrunde, die vorstehend qenannten Nachteile bei einer Anordnunq zur Erfassunq der Position rotierender Wellen der einqanqs qenannten Art zu beseitiqen, und eine Anordnunq zur Erfassunq der Position rotierender Wellen zu schaffen, die eine Positionserkennunq bei Drehzahlen nahe null Umdrehunqen pro Minute ermöqlicht.The invention is based on the task of eliminating the above-mentioned disadvantages in an arrangement for detecting the position of rotating shafts of the type mentioned and of creating an arrangement for detecting the position of rotating shafts which enables position detection at speeds close to zero revolutions per minute.
Erfindunqsqemäß wird die Aufqabe dadurch qelöst, daß der Sensor als ein Hall-Sensor-IC und daß der Geber als ein Impulsrad, an dessen im wesentlichen kreisrunder Peripherie asymmetrisch Zähne anqeordnet sind, ausqebildet ist.According to the invention, the problem is solved in that the sensor is designed as a Hall sensor IC and the encoder is designed as a pulse wheel, on whose essentially circular periphery teeth are arranged asymmetrically.
Die mit der Erfindunq erzielten Vorteile bestehen insbesondere darin, daß durch die Form der Zähne möqlich ist, durch einen Hall-Sensor-IC jeden Zahn sicher und exakt erkennen zu können. Durch eine asymetrische Verteilunq der Zähne wird es möqlich, die Position des Rades zu bestimmen. Nach maximal zwei Zähnen ist die Position somit eindeutiq bestimmbar und nach maximalThe advantages achieved with the invention are in particular that the shape of the teeth makes it possible to identify each tooth reliably and precisely using a Hall sensor IC. The asymmetrical distribution of the teeth makes it possible to determine the position of the wheel. After a maximum of two teeth, the position can thus be determined unambiguously and after a maximum of
140° Drehwinkel die Position erkannt. Durch eine elektronische Auswertung nach zwei gemessenen Zähnen ist die Position einer Welle zu erkennen.The position is detected at a rotation angle of 140°. The position of a shaft can be detected by electronic evaluation after two teeth have been measured.
Vorteilhaft ist es, wenn auf der Peripherie asymmetrisch It is advantageous if the periphery is asymmetrical
> 4 Zähne> 4 teeth
angeordnet sind. Mit 5 und mehr Zähnen ist der Auswertewinkel < 180°. Nach oben hin ist die Anzahl der Zähne lediglich durch die Möglichkeiten der elektronischen Auswerteeinheit begrenzt.are arranged. With 5 or more teeth, the evaluation angle is < 180°. The upper limit of the number of teeth is only the capabilities of the electronic evaluation unit.
Selbstverständlich ist es auch möglich, die Anzahl der Zähne weiter abzusenken. Hierbei ist zu entscheiden, ob der Anwendungsfall mit der Genauigkeit eines so gewonnenen Meßergebnisses im konkreten Fall auskommenOf course, it is also possible to reduce the number of teeth further. In this case, it must be decided whether the application can cope with the accuracy of a measurement result obtained in this way in the specific case
!5 kann.!5 can.
Vorteilhaft ist es, wenn die Zahnräder in etwa 2,3 mm breit sind. Die besondere Dimensionierung der Zähne entspricht damit den Anforderungen, die der eingesetzte Hall-Sensor-IC an das zu messende Objekt stellt. Selbstverständlich sind auch hier geringfügige Abweichungen möglich und notwendig, um die Position einer fast stehenden Welle sicher erkennen zu können.It is advantageous if the gears are around 2.3 mm wide. The special dimensioning of the teeth thus corresponds to the requirements that the Hall sensor IC used places on the object to be measured. Of course, minor deviations are also possible and necessary here in order to be able to reliably detect the position of an almost stationary wave.
Die Zähne sollten in ihrer Form Kettenzähnen ähneln, da durch diese Form ein exakter Schaltpunkt sichergestellt wird.The teeth should be similar in shape to chain teeth, as this shape ensures an exact switching point.
Durch die Auswertung des Puls/Pause-Verhältnisses ist es möglich, nach dem zweiten erkannten Zahn die Position zu erkennen. Dabei gibt der Puls die Winkelgeschwindigkeit an, und die Pause den Winkel zwischen den Zähnen.By evaluating the pulse/pause ratio, it is possible to determine the position after the second tooth has been detected. The pulse indicates the angular velocity and the pause indicates the angle between the teeth.
In der Zeichnung ist der Erfindungsgegenstand in einem Ausführungsbeispiel dargestellt.The drawing shows the subject matter of the invention in an embodiment.
Die Anordnung zur Erfassunq der Position rotierender Wellen besteht aus einem Hall-Sensor-IC 1, das gegenüber einem Impulsrad 2 positioniert ist. Das Impulsrad 2 ist auf einer nicht dargestellten Welle befestigt. ^ Auf seiner kreisrunden Peripherie 3 sind Zähne 4.1, 4.2, 4.3, 4.4 und 4.5 asymmetrisch angeordnet. Der Winkel zwischen dem Zahn 4.1 und 4.2 beträgt 20°, der Winkel zwischen dem Zahn 4.2 und 4.3 40°, der Winkel zwischen dem Zahn 4.3 und 4.4 60°, der Winkel zwischenThe arrangement for detecting the position of rotating shafts consists of a Hall sensor IC 1, which is positioned opposite a pulse wheel 2. The pulse wheel 2 is attached to a shaft (not shown). ^ Teeth 4.1, 4.2, 4.3, 4.4 and 4.5 are arranged asymmetrically on its circular periphery 3. The angle between tooth 4.1 and 4.2 is 20°, the angle between tooth 4.2 and 4.3 is 40°, the angle between tooth 4.3 and 4.4 is 60°, the angle between
1^ dem Zahn 4.4 und 4.5 100° und der Winkel zwischen dem Zahn 4.5 und 4.1 140°. Die Optimierung der einzelnen Winkel zwischen den Zähnen 4.1, ... 4.5 ist dabei in Abstimmung mit der jeweiligen Motorelektronik vorzunehmen. Die Breite iedes einzelnen Zahns 4.1, ... 4.5 beträgt etwa 2,3 mm. Bei der Breite der Zähne 4.1, ... 4.5 wurden die Möglichkeiten des Hall-Sensor-IC 1 berücksichtigt. 1 ^ the tooth 4.4 and 4.5 100° and the angle between the tooth 4.5 and 4.1 140°. The optimization of the individual angles between the teeth 4.1, ... 4.5 must be carried out in coordination with the respective motor electronics. The width of each individual tooth 4.1, ... 4.5 is approximately 2.3 mm. The possibilities of the Hall sensor IC 1 were taken into account for the width of the teeth 4.1, ... 4.5.
Selbstverständlich ist es auch möglich, die Anzahl der Zähne 4.1, ... 4.5 zu reduzieren oder ihre Anzahl zu erhöhen oder den Winkel zwischen ihnen zu verändern.. Im Rahmen ausgedehnter Versuche wurde festgestellt, daß die Anzahl der Zähne wenigstens vier betragen sollte, um genaue und vergleichbare Meßergebnisse zu erhalten.Of course, it is also possible to reduce the number of teeth 4.1, ... 4.5 or to increase their number or to change the angle between them. During extensive tests it was determined that the number of teeth should be at least four in order to obtain accurate and comparable measurement results.
Durch die asymmetrische Verteilung der Zähne 4.1, ... 4.5 auf der Peripherie 3 ist die Möglichkeit gegeben, durch eine elektronische Auswertung bereits nach zwei gemessenen Zähnen die Position einer Welle zu erkennen. Möglich ist das z. B. durch einen Zeitvergleich (Puls:Pause) oder noch genauer durch einen Vergleich zwischen dem Winkel der sich drehenden Welle, der durch einen Wellengeber sowieso in einem Kraftfahrzeug ausgewertet wird und dem Zeitverlauf der Nockenwellenimpulse. Nach maximal 140° Drehwinkel istThe asymmetrical distribution of the teeth 4.1, ... 4.5 on the periphery 3 makes it possible to detect the position of a shaft after just two teeth have been measured by means of an electronic evaluation. This is possible, for example, by comparing the time (pulse:pause) or, even more precisely, by comparing the angle of the rotating shaft, which is evaluated by a shaft encoder in a motor vehicle anyway, and the time course of the camshaft pulses. After a maximum angle of rotation of 140°,
■■■ ■■ ~- O ■ ~ ■ r. &eegr; &igr; ' &kgr; &Ggr;■■■ ■■ ~- O ■ ~ ■ r. &eegr;&igr;'&kgr;&Ggr;
die Position erkannt. 1the position recognized. 1
Durch die besondere Ausqestaltunq der elektronischen Auswertunq (Rechner) wird die Anzahl der Zähne 4.1, ... 4.5 nach oben beqrenzt. Je qrößer die Verarbeitunqsmöqlichkeiten der Auswerteeinheit sind, um so eine qrößere Zahl von Zähnen 4.1, ... ist auf dem Impulsrad positionierbar. Der Durchmesser d des Impulsrades 2 kann den ieweiliqen Einsatzbedinqunqen entsprechend anqepaßt werden. So werden qeometrisch sehr kleine Zähne 4.1, ... und durch ihre asymmetrische Verteilunq auf der kreisrunden Peripherie 3 des Impulsrades 2 bereits nach maximal zwei Zähnen die Position bestimmbar und nach maximal 140° Drehwinkel, d. h. nicht einmal nach einer halben Umdrehunq, die Position einer fast stehenden Welle eindeutiq erkannt.The special design of the electronic evaluation (computer) places an upper limit on the number of teeth 4.1,... 4.5. The greater the processing capabilities of the evaluation unit, the greater the number of teeth 4.1,... that can be positioned on the pulse wheel. The diameter d of the pulse wheel 2 can be adapted to suit the respective application conditions. For example, the position of very small teeth 4.1,... and their asymmetrical distribution on the circular periphery 3 of the pulse wheel 2 can be determined after a maximum of two teeth and the position of an almost stationary shaft can be clearly recognized after a maximum of 140° angle of rotation, i.e. not even after half a revolution.
- ■-1 ■<» 6-- ~ ■■- ■- 1 ■<» 6-- ~ ■■
y r -r -jy r -r -j
1 Hall-Sensor-IC1 Hall sensor IC
2 Impulsrad2 Impulse wheel
3 Peripherie 4.1, ... 4.5 Zahn3 Periphery 4.1, ... 4.5 Tooth
d Durchmesserd Diameter
Claims (3)
anqeordnet sind.2. Arrangement according to claim 1, characterized in that on the periphery (3) asymmetrically > 4 teeth (4.1, ... 4.5)
are arranged.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9216703U DE9216703U1 (en) | 1992-12-08 | 1992-12-08 | Arrangement for detecting the position of rotating shafts |
| DE4341405A DE4341405A1 (en) | 1992-12-08 | 1993-12-04 | Rotating shaft position and rpm detecting arrangement - has pulse wheel made of soft magnetic material with asymmetrically arranged teeth detected by Hall sensor IC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9216703U DE9216703U1 (en) | 1992-12-08 | 1992-12-08 | Arrangement for detecting the position of rotating shafts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9216703U1 true DE9216703U1 (en) | 1993-02-25 |
Family
ID=6886891
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE9216703U Expired - Lifetime DE9216703U1 (en) | 1992-12-08 | 1992-12-08 | Arrangement for detecting the position of rotating shafts |
| DE4341405A Withdrawn DE4341405A1 (en) | 1992-12-08 | 1993-12-04 | Rotating shaft position and rpm detecting arrangement - has pulse wheel made of soft magnetic material with asymmetrically arranged teeth detected by Hall sensor IC |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4341405A Withdrawn DE4341405A1 (en) | 1992-12-08 | 1993-12-04 | Rotating shaft position and rpm detecting arrangement - has pulse wheel made of soft magnetic material with asymmetrically arranged teeth detected by Hall sensor IC |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE9216703U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4343198A1 (en) * | 1993-12-17 | 1995-06-22 | A B Elektronik Gmbh | Method and device for detecting the position of rotating shafts |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2859784B1 (en) * | 2003-09-17 | 2006-01-20 | Siemens Vdo Automotive | METHOD FOR DETERMINING THE POSITION OF A ROTATING PIECE WITH A VIEW, IN PARTICULAR, OF ITS AUTO-SYNCHRONIZATION |
| DE102007033745B4 (en) * | 2007-07-19 | 2014-07-24 | Zf Friedrichshafen Ag | Inductive speed detection |
| DE102016110614A1 (en) * | 2016-06-09 | 2017-12-14 | Thyssenkrupp Ag | Shaft, in particular camshaft, with a device for determining a rotational speed and a rotational angle of the shaft |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2814606A1 (en) * | 1978-04-05 | 1979-10-18 | Bosch Gmbh Robert | DEVICE FOR GENERATING A SPEED-DEPENDENT SIGNAL |
| DE2933516A1 (en) * | 1979-08-18 | 1981-03-26 | Robert Bosch Gmbh, 70469 Stuttgart | DEVICE FOR SPEED DETECTION AND ANGLE SEGMENT DETECTION OF A SHAFT, IN PARTICULAR THE CRANKSHAFT OF AN INTERNAL COMBUSTION ENGINE |
| GB8322886D0 (en) * | 1983-08-25 | 1983-09-28 | Lucas Ind Plc | Transducer means |
-
1992
- 1992-12-08 DE DE9216703U patent/DE9216703U1/en not_active Expired - Lifetime
-
1993
- 1993-12-04 DE DE4341405A patent/DE4341405A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4343198A1 (en) * | 1993-12-17 | 1995-06-22 | A B Elektronik Gmbh | Method and device for detecting the position of rotating shafts |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4341405A1 (en) | 1994-06-09 |
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