EP1307940B1 - Device for carrying out the non-contact rotational transmission of high-frequency signals - Google Patents

Device for carrying out the non-contact rotational transmission of high-frequency signals Download PDF

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Publication number
EP1307940B1
EP1307940B1 EP01960134A EP01960134A EP1307940B1 EP 1307940 B1 EP1307940 B1 EP 1307940B1 EP 01960134 A EP01960134 A EP 01960134A EP 01960134 A EP01960134 A EP 01960134A EP 1307940 B1 EP1307940 B1 EP 1307940B1
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Prior art keywords
coupling
coupling faces
designed
dielectric
transmission
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EP01960134A
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German (de)
French (fr)
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EP1307940A1 (en
Inventor
Georg Lohr
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Schleifring und Apparatebau GmbH
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Schleifring und Apparatebau GmbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/06—Movable joints, e.g. rotating joints
    • H01P1/062—Movable joints, e.g. rotating joints the relative movement being a rotation
    • H01P1/066—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation
    • H01P1/067—Movable joints, e.g. rotating joints the relative movement being a rotation with an unlimited angle of rotation the energy being transmitted in only one line located on the axis of rotation

Definitions

  • the invention relates to a device for transmitting in particular high-frequency signals between mutually rotatable parts.
  • the waveguide systems such as disclosed in GB-A-2085662, use a ⁇ / 4 transformer inherently limited in bandwidth to bridge the gap, the boundary between the two mutually rotatable parts. This makes it possible to realize such a waveguide-based rotary transformer only with a relatively limited bandwidth.
  • Another disadvantage is the additional mechanical complexity and the space requirement of ⁇ / 4 transformers.
  • the object of the invention is therefore to provide a device according to the preamble of claim 1, which allows broadband transmission of electrical signals with low maintenance.
  • the inventive device consists of two mutually rotatably mounted components, each of these components has at least one coupling surface for capacitive coupling.
  • the coupling surfaces of the two components are arranged so that they are largely parallel to each other at a small distance of at most a few millimeters. The optimum distance is according to experience in the order of 0.1 mm. Under parallelism here is a course of the surfaces to be understood that they have the highest possible capacity to each other. That is, in a decomposition in the first coupling surface in infinitesimal small patches there are on the second Coupling surface each corresponding thereto infinitesimal small surface piece whose surface extends at least substantially parallel to the first surface piece.
  • this term does not include parallelism only parallel plates, but also concentric cylinders and other shapes, for example, superimposed conical surfaces.
  • a dielectric may be a liquid or a gas.
  • the coupling surfaces are forced against each other. This forced operation can be done for example by an additional bearing or by the arrangement of the coupling surfaces or the dielectric itself.
  • the device according to the invention corresponds to a sliding bearing, which is used for the transmission of high-frequency signals.
  • a further embodiment of the invention in the case of a circular dielectric consists in a device, as it is also known under the term air bearing.
  • a particularly small gap between the two mutually rotatable parts which is supplied by pressurized gas.
  • the two surfaces slide on the gas almost without friction.
  • the capacitive coupling is particularly good due to the relatively narrow gap and the associated high coupling capacity.
  • a further advantageous embodiment in the case of liquids as a dielectric is that between the rotating components a small gap is provided which is preferably filled with liquid but oil. This results in a very low-friction design, which also has good storage properties, and at the same time provides a very good coupling by the oil.
  • the rotatable components are joined together in such a way that they constitute a circular waveguide.
  • an existing ⁇ / 4 transformer can also be reduced by the use of dielectric to improve the transmission properties.
  • the rotatable components are summarized such that they represent a coaxial conductor system.
  • the dielectric takes over the mechanical positive guidance in addition to the electrical coupling.
  • a dielectric is selected with correspondingly good sliding properties on the electrical coupling surfaces.
  • the coupling surfaces are rotationally symmetrical to the axis of rotation of the device attached. This allows a particularly simple structure.
  • commercial components for plain bearings can be used here.
  • the coupling surfaces are arranged radially or axially.
  • the transmission system can be adapted to the respective system requirements.
  • This also applies to an axial device in which e.g. Circular surfaces or annular surfaces can be arranged opposite each other.
  • conical or circular segment or hemispherical devices are possible.
  • Devices which are not exclusively aligned axially or radially can also absorb forces in several axes in addition to the transmission of electrical signals. This makes it possible to achieve very compact devices with integrated storage, since electrical and mechanical functions are combined in one element.
  • a plurality of coupling devices of the described coupling surfaces and dielectrics are arranged coaxially to the axis of rotation. If several coupling devices combined into one unit, for example, coaxial conductor systems can be simulated or multiple signals can be transmitted simultaneously.
  • the dielectric consists of a thin layer of liquid or gas.
  • the high rigidity of thin liquid or gas layers serves to maintain a minimum distance between the two components rotatably mounted relative to one another.
  • the coupling surfaces contain structures for multi-channel signal transmission. As a result, for example, the transmission speed or the amount of data transmitted can be increased.
  • FIG. 1 shows an exemplary embodiment of a device according to the invention in coaxial design.
  • the first component (1) which is mounted rotatably relative to the second component (2), has at least one first contact surface (3), which corresponds to a second contact surface (4) of the second component.
  • a dielectric (5) Between the two components is a dielectric (5).
  • FIG. 2 shows by way of example a further device according to the invention which is suitable for the simultaneous transmission of several signals.
  • the contact surfaces (11, 12, 13) as well as the corresponding contact surfaces (14, 15, 16) are located on the first rotating component on the second rotating component.
  • the coupling of the contact surfaces by means of dielectric layers (17, 18, 19).
  • FIG. 3 shows a further exemplary embodiment of the invention, in the example, the dielectric is arranged perpendicular to the axis of rotation.
  • the signal coupling from the first rotatable surface (21) by means of the dielectric (23) to the second surface (22).
  • FIG. 4 shows a further exemplary embodiment of the invention, in the example, the dielectric (33) and the coupling surfaces (31, 32) are designed hemispherical. Any other embodiments, such as ellipsoids, are possible here.
  • FIG. 5 shows a further embodiment of the invention for multi-channel transmission, in which a dielectric for coupling a channel parallel to the axis of rotation and a further dielectric for coupling the second channel is arranged perpendicular to the axis of rotation. This corresponds to a combination of FIG. 1) and FIG. 3).
  • the same reference numerals are assigned to the same elements.
  • FIG. 6 shows a device in which a coupling surface (50) contains coaxial conductor structures (51, 52, 53), which are advantageously arranged on a circuit board.
  • FIG. 7 shows a waveguide assembly consisting of the two rotatable components (61, 62) and the dielectric (63).
  • FIG. 8 shows details of a coaxial rotary joint.
  • the first component (1) which is mounted rotatably relative to the second component (2), has at least one first contact surface (3), which corresponds to a second contact surface (4) of the second component.
  • a dielectric (5) for low-impedance coupling of the two components.
  • FIG. 9 shows the technical realization of a coaxial rotary joint with an inner conductor (75) and an outer conductor (76).
  • the positioning of the inner conductor with respect to the outer conductor by means of dielectric supports (74).
  • the first component (1) is rotatably mounted relative to the second component (2) by means of the bearings (70) and their seal (71). Between the two components is a dielectric (5).
  • the contacting of the rotary connection takes place by means of the coaxial connector (73).
  • FIG. 10 shows the technical realization of a waveguide rotary joint.
  • the first component (1) is rotatably mounted relative to the second component (2) by means of the bearings (70) and their seal (71). Between the two components is a dielectric (5).

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Abstract

An array transmits a wide-band electric signal between at least two components disposed for rotation relative to each other. The components are provided with coupling surfaces that are maintained at a largely constant distance from each other via the rotary movement. The space between the coupling surfaces is predominantly filled with a dielectric material.

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Übertragung insbesondere hochfrequenter Signale zwischen gegeneinander drehbaren Teilen.The invention relates to a device for transmitting in particular high-frequency signals between mutually rotatable parts.

Hierfür sind entsprechend dem Stand der Technik eine Vielzahl unterschiedlicher Übertragungssysteme bekannt. Mechanisch kontaktierende Schleifringe zeigen von der Frequenz Null an bis in den 100-MHz-Bereich gutes Übertragungsverhalten, solange die äußeren Abmessungen klein gegenüber der zu übertragenden kleinsten Wellenlänge sind. Allerdings besitzen diese mechanischen Schleifkontaktanordnungen gravierende Nachteile, wie ein sehr breitbandiges Kontaktrauschen oder auch hohen Wartungsbedarf und - gegenüber kontaktlosen Systemen - relativ niedrige Lebensdauer. Eine Übertragung von Signalen, deren Wellenlänge in der Größenordnung des Durchmessers des Drehübertragers liegt, ist mit dieser Technik nicht möglich.
Zur Übertragung hochfrequenter Signale bis hin zu vielen GHz werden Drehübertrager in Form von Koaxialsystemen oder Hohlleitern eingesetzt. Nachteilig an den Koaxialsystemen ist, daß diese meist in Form eines koaxiale Steckers aufgebaut sind und daher mechanisch schleifende Kontakte benötigen, welche eine geringe Zuverlässigkeit und niedrige Lebensdauer besitzen.For this purpose, a variety of different transmission systems are known according to the prior art. Mechanically contacting slip rings show good transmission behavior from zero frequency up to the 100 MHz range, as long as the external dimensions are small compared to the smallest wavelength to be transmitted. However, these mechanical sliding contact arrangements have serious disadvantages, such as a very broadband contact noise or high maintenance requirements and - compared to contactless systems - relatively low life. A transmission of signals whose wavelength is of the order of the diameter of the rotary transformer is not possible with this technique.
For the transmission of high-frequency signals up to many GHz, rotary transformers in the form of coaxial systems or waveguides are used. A disadvantage of the Koaxialsystemen that these are usually constructed in the form of a coaxial connector and therefore require mechanical sliding contacts, which have a low reliability and low life.

Die Hohlleitersysteme, wie sie beispielsweise in der GB-A-2085662 veröffentlicht sind, verwenden zu Überbrückung des Drehspalts, der Grenzlinie zwischen den beiden gegeneinander drehbaren Teilen, einen λ/4 Transformator, welcher naturgemäß eine begrenzte Bandbreite besitzt. Damit lässt sich ein solcher auf Hohlleitern basierende Drehübertrager nur mit einer relativ begrenzten Bandbreite realisieren. Ein weiterer Nachteil ist der zusätzliche mechanische Aufwand sowie der Platzbedarf der λ/4-Transformatoren.The waveguide systems, such as disclosed in GB-A-2085662, use a λ / 4 transformer inherently limited in bandwidth to bridge the gap, the boundary between the two mutually rotatable parts. This makes it possible to realize such a waveguide-based rotary transformer only with a relatively limited bandwidth. Another disadvantage is the additional mechanical complexity and the space requirement of λ / 4 transformers.

Eine wesentliche Verbesserung der Zuverlässigkeit und der Bandbreite lässt sich durch den Einsatz von aktiven, kontaktlosen Drehübertragungssystemen erreichen. Ein solches aktives, kontaktloses Drehübertragungssystem ist in der Deutschen Patentanmeldung D 44 12958.0 zur kapazitiven Drehübertragung mit Streifenleitungstechnik beschrieben. Hier wird ein Signal mittels eines Verstärkers in eine Streifenleitung eingekoppelt. Die Signalauskoppelung erfolgt mittels einer kapazitiven Sonde und eines weiteren Verstärkers. Der Nachteil dieser Vorrichtung ist die relativ kleine und auf Grund mechanischer Toleranzen während der Bewegung stark schwankende Koppelkapazität zwischen der Streifenleitung und dem Auskoppelelement. Daher werden zur Impedanzanpassung bzw. -verstärkung die beschriebenen Verstärker benötigt. Derartige Vorrichtungen sind primär für die Übertragung digitaler Signale konzipiert, da hier Amplitudenschwankungen, welche durch einen stark schwankenden Koppelfaktor der Übertragungseinrichtung hervorgerufen werden, keine Rolle spielen. Somit sind derartige aktive, kontaktlosen Übertragungssysteme zur Übertragung analoger Signale, insbesondere wenn hohe Anforderungen an die Dynamik gestellt werden, kaum geeignet.Significant reliability and bandwidth improvements can be achieved through the use of active, contactless rotary transmission systems. Such an active contactless rotation transmission system is described in the German patent application D 44 12958.0 for capacitive rotation transmission with stripline technology. Here, a signal is coupled by means of an amplifier in a stripline. The signal extraction takes place by means of a capacitive probe and another amplifier. The disadvantage of this device is the relatively small and due to mechanical tolerances during the movement strongly fluctuating coupling capacitance between the stripline and the coupling element. Therefore, the described amplifiers are needed for impedance matching or amplification. Such devices are primarily designed for the transmission of digital signals, since here amplitude fluctuations, which are caused by a highly fluctuating coupling factor of the transmission device, play no role. Thus, such are active contactless transmission systems for the transmission of analog signals, especially when high demands are placed on the dynamics, hardly suitable.

In der US 6,018,279 ist ein kapazitiver Drehübertrager offenbart, welcher zwei gegeneinander drehbar gelagerte Leitungen in Form von offenen Ringen aufweist. Die Ringe werden jeder individuell seiner Länge nach von dem zu übertragenden Strom durchflossen. Diese Anordnung hat den Nachteil einer relativ geringen Bandbreite und einer positionsabhängigen bzw. drehwinkelabhängigen Einfügungsdämpfung.In US 6,018,279 a capacitive rotary transformer is disclosed, which has two mutually rotatably mounted lines in the form of open rings. The rings are each individually traversed by the current to be transmitted in its length. This arrangement has the disadvantage of a relatively low bandwidth and a position-dependent or rotation angle-dependent insertion loss.

Die Aufgabe der Erfindung ist es daher, eine Vorrichtung entsprechend dem Oberbegriff des Anspruchs 1 zu schaffen, welche eine breitbandige Übertragung elektrischer Signale bei geringem Wartungsaufwand ermöglicht.The object of the invention is therefore to provide a device according to the preamble of claim 1, which allows broadband transmission of electrical signals with low maintenance.

Die Aufgabe wird mit den im Anspruch 1 angegebenen Mitteln gelöst. Vorteilhafte Weiterbildungen sind Gegenstand der Unteransprüche.The object is achieved by the means specified in claim 1. Advantageous developments are the subject of the dependent claims.

Die erfindungsgemäße Vorrichtung besteht aus zwei gegeneinander drehbar gelagerten Komponenten, wobei jede dieser Komponenten mindestens eine Koppelfläche zur kapazitiver Verkopplung besitzt. Die Koppelflächen der beiden Komponenten sind so angeordnet, daß sie in einem geringen Abstand von höchstens einigen Millimetern weitgehend parallel zueinander verlaufen. Der optimale Abstand liegt erfahrungsgemäß in einer Größenordnung von 0.1 mm. Unter Parallelität ist hier ein Verlauf der Flächen dahingehend zu verstehen, daß diese eine möglichst hohe Kapazität zueinander besitzen. Das heißt bei einer Zerlegung in der ersten Koppelfläche in infinitesimal kleine Flächenstücke gibt es auf der zweiten Koppelfläche ein jeweils damit korrespondierendes infinitesimal kleines Flächenstück, dessen Fläche zumindest weitgehend parallel zum ersten Flächenstück verläuft. Somit umfaßt diese Begriff der Parallelität nicht nur parallele Platten, sondern auch konzentrische Zylinder sowie andere Formen, beispielsweise übereinander angeordnete kegelige Flächen. Weiterhin wird zur Erhöhung der Koppelkapazität und damit zur Verringerung der Koppelimpedanz der Raum zwischen den Koppelflächen weitestgehend mit einem Dielektrikum gefüllt. Ein solches Dielektrikum kann eine Flüssigkeit oder ein Gas sein. Um eine weitestgehend positionsunabhängige Verkoppelung zu erreichen, werden die Koppelflächen gegeneinander zwangsgeführt. Diese Zwangsführung kann beispielsweise durch ein zusätzliches Lager oder auch durch die Anordnung der Koppelflächen bzw. des Dielektrikums selbst erfolgen. Somit entspricht die erfindungsgemäße Vorrichtung einem Gleitlager, welches zur Übertragung hochfrequenter Signale verwendet wird.The inventive device consists of two mutually rotatably mounted components, each of these components has at least one coupling surface for capacitive coupling. The coupling surfaces of the two components are arranged so that they are largely parallel to each other at a small distance of at most a few millimeters. The optimum distance is according to experience in the order of 0.1 mm. Under parallelism here is a course of the surfaces to be understood that they have the highest possible capacity to each other. That is, in a decomposition in the first coupling surface in infinitesimal small patches there are on the second Coupling surface each corresponding thereto infinitesimal small surface piece whose surface extends at least substantially parallel to the first surface piece. Thus, this term does not include parallelism only parallel plates, but also concentric cylinders and other shapes, for example, superimposed conical surfaces. Furthermore, in order to increase the coupling capacitance and thus to reduce the coupling impedance, the space between the coupling surfaces is largely filled with a dielectric. Such a dielectric may be a liquid or a gas. In order to achieve a largely position-independent coupling, the coupling surfaces are forced against each other. This forced operation can be done for example by an additional bearing or by the arrangement of the coupling surfaces or the dielectric itself. Thus, the device according to the invention corresponds to a sliding bearing, which is used for the transmission of high-frequency signals.

Eine weitere erfindungsgemäße Ausführungsform im Falle eines kreisförmigen Dielektrikums besteht in einer Vorrichtung, wie sie auch unter dem Begriff Luftlager bekannt ist. Hier besteht zwischen den beiden gegeneinander drehbaren Teilen ein besonders kleiner Spalt, welcher durch unter Druck stehendes Gas versorgt wird. Die beiden Flächen gleiten auf dem Gas fast reibungsfrei. Bei dieser Vorrichtung ist die kapazitive Kopplung aufgrund des relativ schmalen Spaltes und der damit verbundenen hohen Kopplungskapazität besonders gut.A further embodiment of the invention in the case of a circular dielectric consists in a device, as it is also known under the term air bearing. Here there is a particularly small gap between the two mutually rotatable parts, which is supplied by pressurized gas. The two surfaces slide on the gas almost without friction. In this device, the capacitive coupling is particularly good due to the relatively narrow gap and the associated high coupling capacity.

Eine weitere vorteilhafte Ausführungsform im Falle von Flüssigkeiten als Dielektrikum besteht darin, daß zwischen den drehenden Komponenten ein kleiner Spalt vorgesehen ist welcher mit Flüssigkeit vorzugsweise aber Öl gefüllt ist. Damit ergibt sich eine sehr reibungsarme Ausgestaltung, welche auch gute Lagereigenschaften besitzt, sowie gleichzeitig durch das Öl eine sehr gute Verkoppelung bietet.A further advantageous embodiment in the case of liquids as a dielectric is that between the rotating components a small gap is provided which is preferably filled with liquid but oil. This results in a very low-friction design, which also has good storage properties, and at the same time provides a very good coupling by the oil.

In einer besonders vorteilhaften Ausgestaltung der Erfindung sind die drehbaren Komponenten derart zusammengefügt, dass sie einen Rundhohlleiter darstellen. In einem solchen Falle kann auch zur Verbesserung der Übertragungseigenschaften ein vorhandener λ/4 Transformator durch den Einsatz von Dielektrikum verkleinert werden.In a particularly advantageous embodiment of the invention, the rotatable components are joined together in such a way that they constitute a circular waveguide. In such a case, an existing λ / 4 transformer can also be reduced by the use of dielectric to improve the transmission properties.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung sind die drehbaren Komponenten derart zusammengefasst, dass sie ein koaxiales Leitersystem darstellen.In a further advantageous embodiment of the invention, the rotatable components are summarized such that they represent a coaxial conductor system.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung übernimmt das Dielektrikum neben der elektrischen Verkoppelung auch die mechanische Zwangsführung. Dazu wird ein Dielektrikum mit entsprechend guten Gleiteigenschaften auf den elektrischen Koppelflächen gewählt.In a further advantageous embodiment of the invention, the dielectric takes over the mechanical positive guidance in addition to the electrical coupling. For this purpose, a dielectric is selected with correspondingly good sliding properties on the electrical coupling surfaces.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung sind die Koppelflächen rotationssymmetrisch zur Drehachse der Vorrichtung angebracht. Dies ermöglicht einen besonders einfachen Aufbau. Insbesondere können hier handelsübliche Komponenten für Gleitlager verwendet werden.In a further advantageous embodiment of the invention, the coupling surfaces are rotationally symmetrical to the axis of rotation of the device attached. This allows a particularly simple structure. In particular, commercial components for plain bearings can be used here.

In weiteren Ausgestaltungen werden die Koppelflächen radial bzw. axial angeordnet. Damit kann das Übertragungssystem an die jeweiligen Systemanforderungen angepasst werden. Dies gilt auch für eine axiale Vorrichtung, bei der z.B. Kreisflächen oder Kreisringflächen einander gegenüber angeordnet werden können. Ebenso sind kegelförmige oder auch kreissegment- bzw. halbkugelförmige Vorrichtungen möglich.In further embodiments, the coupling surfaces are arranged radially or axially. Thus, the transmission system can be adapted to the respective system requirements. This also applies to an axial device in which e.g. Circular surfaces or annular surfaces can be arranged opposite each other. Likewise, conical or circular segment or hemispherical devices are possible.

Vorrichtungen die nicht ausschließlich axial oder radial ausgerichtet sind können neben der Übertragung elektrischer Signale auch Kräfte in mehreren Achsen aufnehmen. Hierdurch lassen sich sehr kompakte Vorrichtungen mit integrierter Lagerung erreichen, da elektrische und mechanische Funktionen in einem Element kombiniert werden.Devices which are not exclusively aligned axially or radially can also absorb forces in several axes in addition to the transmission of electrical signals. This makes it possible to achieve very compact devices with integrated storage, since electrical and mechanical functions are combined in one element.

In einer anderen Ausgestaltung der Erfindung sind mehrere Koppeleinrichtungen aus den beschriebenen Koppelflächen und Dielektrika koaxial zur Drehachse angeordnet. Werden mehrere Koppeleinrichtungen zu einer Einheit zusammengefasst, können beispielsweise koaxiale Leitersysteme nachgebildet oder auch mehrere Signale gleichzeitig übertragen werden.In another embodiment of the invention, a plurality of coupling devices of the described coupling surfaces and dielectrics are arranged coaxially to the axis of rotation. If several coupling devices combined into one unit, for example, coaxial conductor systems can be simulated or multiple signals can be transmitted simultaneously.

Bei Flüssigkeiten als Dielektrika sind inbesondere Gleitringdichtungen von Interesse, die sehr genau gearbeitet sind und auch zur Drehübertragung geeignet sind.In the case of liquids as dielectrics, in particular mechanical seals are of interest, which are worked very precisely and are also suitable for rotary transmission.

In der Erfindung besteht das Dielektrikum aus einer dünnen Schicht einer Flüssigkeit oder eines Gases. Dabei dient die hohe Steifigkeit dünner Flüssigkeits- bzw. Gasschichten zur Aufrechterhaltung eines minimalen Abstandes zwischen den beiden gegeneinander drehbar gelagerten Komponenten.In the invention, the dielectric consists of a thin layer of liquid or gas. The high rigidity of thin liquid or gas layers serves to maintain a minimum distance between the two components rotatably mounted relative to one another.

In einer weiteren Ausgestaltung der Erfindung enthalten die Koppelflächen Strukturen zur mehrkanaligen Signalübertragung. Dadurch können beispielsweise die Übertragungsgeschwindigkeit bzw. die übertragene Datenmenge gesteigert werden.In a further embodiment of the invention, the coupling surfaces contain structures for multi-channel signal transmission. As a result, for example, the transmission speed or the amount of data transmitted can be increased.

Die Bereitstellung von Koppelflächen mit Strukturen zur mehrkanaligen Signalübertragung kann beispielsweise mittels Leiterplatten, welche koaxiale Strukturen enthalten, erfolgen. Damit ist ein relativ einfacher Aufbau möglich.The provision of coupling surfaces with structures for multichannel signal transmission can be achieved, for example, by means of printed circuit boards which contain coaxial structures. respectively. This makes a relatively simple structure possible.

Die Erfindung wird nachstehend ohne Beschränkung des allgemeinen Erfindungsgedankens anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung exemplarisch beschrieben, auf die im übrigen hinsichtlich der Offenbarung aller im Text nicht näher erläuterten erfindungsgemäßen Einzelheiten ausdrücklich verwiesen wird. Es zeigen:

Fig. 1:
erfindungsgemäße Vorrichtung in koaxialer Bauweise;
Fig. 2:
mehrkanalige Vorrichtung;
Fig. 3:
Vorrichtung mit Dielektrikum senkrecht zur Drehachse;
Fig. 4:
Vorrichtung mit halbkugelförmigem Dielektrikum;
Fig. 5:
mehrkanalige Vorrichtung;
Fig. 6:
Vorrichtung mit koaxialen Leiterstrukturen;
Fig. 7:
prinzipieller Aufbau einer Hohlleiteranordnung.
Fig. 8:
Details einer koaxialen Drehverbindung.
Fig. 9:
technische Realisierung einer koaxialen Drehverbindung.
Fig. 10:
technische Realisierung einer Hohlleiterdrehverbindung
The invention will now be described by way of example without limitation of the general inventive concept using exemplary embodiments with reference to the drawings, which are expressly referred to in the rest with respect to the disclosure of all unspecified in the text details of the invention. Show it:
Fig. 1:
inventive device in coaxial design;
Fig. 2:
multi-channel device;
3:
Device with dielectric perpendicular to the axis of rotation;
4:
Hemispherical dielectric device;
Fig. 5:
multi-channel device;
Fig. 6:
Device with coaxial conductor structures;
Fig. 7:
basic structure of a waveguide arrangement.
Fig. 8:
Details of a coaxial rotary joint.
Fig. 9:
technical realization of a coaxial rotary joint.
Fig. 10:
technical realization of a waveguide rotary joint

Figur 1
zeigt eine beispielhafte Ausführung einer erfindungsgemäßen Vorrichtung in koaxialer Bauweise. Dabei besitzt die erste Komponente (1), welche gegenüber der zweiten Komponente (2) drehbar gelagert ist, mindestens eine erste Kontaktfläche (3), welche mit einer zweiten Kontaktfläche (4) der zweiten Komponente korrespondiert. Zwischen den beiden Komponenten befindet sich ein Dielektrikum (5).FIG. 1
shows an exemplary embodiment of a device according to the invention in coaxial design. In this case, the first component (1), which is mounted rotatably relative to the second component (2), has at least one first contact surface (3), which corresponds to a second contact surface (4) of the second component. Between the two components is a dielectric (5).

Figur 2
zeigt beispielhaft eine weitere erfindungsgemäße Vorrichtung, welche zur gleichzeitigen Übertragung mehrerer Signale geeignet ist. Dabei befinden sich auf der ersten drehenden Komponente die Kontaktflächen (11, 12, 13) sowie die damit korrespondierenden Kontaktflächen (14, 15, 16) auf der zweiten drehenden Komponente. Die Verkoppelung der Kontaktflächen erfolgt mittels dielektrischer Schichten (17, 18, 19).FIG. 2
shows by way of example a further device according to the invention which is suitable for the simultaneous transmission of several signals. In this case, the contact surfaces (11, 12, 13) as well as the corresponding contact surfaces (14, 15, 16) are located on the first rotating component on the second rotating component. The coupling of the contact surfaces by means of dielectric layers (17, 18, 19).

Figur 3
zeigt eine weitere beispielhafte Ausgestaltung der Erfindung, in der beispielhaft das Dielektrikum senkrecht zur Drehachse angeordnet ist. Hier erfolgt die Signalkopplung von der ersten drehbaren Fläche (21) mittels des Dielektrikums (23) zur zweiten Fläche (22).FIG. 3
shows a further exemplary embodiment of the invention, in the example, the dielectric is arranged perpendicular to the axis of rotation. Here, the signal coupling from the first rotatable surface (21) by means of the dielectric (23) to the second surface (22).

Figur 4
zeigt eine weitere beispielhafte Ausgestaltung der Erfindung, in der beispielhaft das Dielektrikum (33) bzw. die Koppelflächen (31, 32) halbkugelförmig ausgeführt sind. Hierbei sind beliebige andere Ausführungsformen, wie Ellipsoide, möglich.FIG. 4
shows a further exemplary embodiment of the invention, in the example, the dielectric (33) and the coupling surfaces (31, 32) are designed hemispherical. Any other embodiments, such as ellipsoids, are possible here.

Figur 5
zeigt eine weitere Ausgestaltung der Erfindung zur mehrkanaligen Übertragung, in der ein Dielektrikum zur Verkoppelung eines Kanals parallel zur Drehachse und ein weiteres Dielektrikum zur Verkoppelung des zweiten Kanals senkrecht zur Drehachse angeordnet ist. Dies entspricht einer Kombination aus Fig. 1) und Fig. 3). Dabei sind dieselben Bezugszeichen denselben Elementen zugeordnet.FIG. 5
shows a further embodiment of the invention for multi-channel transmission, in which a dielectric for coupling a channel parallel to the axis of rotation and a further dielectric for coupling the second channel is arranged perpendicular to the axis of rotation. This corresponds to a combination of FIG. 1) and FIG. 3). The same reference numerals are assigned to the same elements.

Figur 6
zeigt eine Vorrichtung, bei der eine Koppelfläche (50) koaxiale Leiterstrukturen (51, 52, 53) enthält, welche vorteilhafterweise auf einer Leiterplatte angeordnet sind.FIG. 6
shows a device in which a coupling surface (50) contains coaxial conductor structures (51, 52, 53), which are advantageously arranged on a circuit board.

Figur 7
zeigt eine Hohlleiteranordnung, bestehend aus den beiden drehbaren Komponenten (61, 62) und dem Dielektrikum (63).FIG. 7
shows a waveguide assembly consisting of the two rotatable components (61, 62) and the dielectric (63).

Figur 8
zeigt Details einer koaxialen Drehverbindung. Dabei besitzt die erste Komponente (1), welche gegenüber der zweiten Komponente (2) drehbar gelagert ist, mindestens eine erste Kontaktfläche (3), welche mit einer zweiten Kontaktfläche (4) der zweiten Komponente korrespondiert. Zwischen den beiden Komponenten befindet sich ein Dielektrikum (5) zur niederohmigen Verkoppelung der beiden Komponenten.FIG. 8
shows details of a coaxial rotary joint. In this case, the first component (1), which is mounted rotatably relative to the second component (2), has at least one first contact surface (3), which corresponds to a second contact surface (4) of the second component. Between the two components is a dielectric (5) for low-impedance coupling of the two components.

Figur 9
zeigt die technische Realisierung einer koaxialen Drehverbindung mit einem Innenleiter (75) und einem Außenleiter (76). Die Positionierung des Innenleiters in Bezug auf den Außenleiter erfolgt mittels dielektrischer Stützen (74). Die erste Komponente (1), ist gegenüber der zweiten Komponente (2) mittels der Lager (70) und deren Abdichtung (71) drehbar gelagert. Zwischen den beiden Komponenten befindet sich ein Dielektrikum (5). Die Kontaktierung der Drehverbindung erfolgt mittels der Koaxialstecker (73).FIG. 9
shows the technical realization of a coaxial rotary joint with an inner conductor (75) and an outer conductor (76). The positioning of the inner conductor with respect to the outer conductor by means of dielectric supports (74). The first component (1) is rotatably mounted relative to the second component (2) by means of the bearings (70) and their seal (71). Between the two components is a dielectric (5). The contacting of the rotary connection takes place by means of the coaxial connector (73).

Figur 10
zeigt die technische Realisierung einer Hohlleiterdrehverbindung. Die erste Komponente (1), ist gegenüber der zweiten Komponente (2) mittels der Lager (70) und deren Abdichtung (71) drehbar gelagert. Zwischen den beiden Komponenten befindet sich ein Dielektrikum (5).FIG. 10
shows the technical realization of a waveguide rotary joint. The first component (1) is rotatably mounted relative to the second component (2) by means of the bearings (70) and their seal (71). Between the two components is a dielectric (5).

Claims (12)

  1. Device for wideband electrical transmission of signals between at least two components (1 , 2) disposed to be rotatable relative to each other, the components having coupling faces (3, 4) for capacitive coupling, which are maintained at a substantially constant distance from each other across the rotary movement,
    characterized in that
    the coupling faces are designed to be maintained at a very small distance from each other by an intermediate gas film, or by an intermediate liquid film, in particular an oil film.
  2. Device according to the preamble of claim 1,
    characterized in that
    the coupling faces are disposed radially to the rotation axis, and designed so that the space between the coupling faces is filled mainly with a dielectric (5), the device being designed to be a round hollow waveguide or a coaxial conductor system for transmitting electromagnetic waves.
  3. Device according to claim 1,
    characterized in that
    the device is designed to be a round hollow waveguide for transmitting electromagnetic waves.
  4. Device according to claim 1,
    characterized in that
    the device is equipped to be a coaxial conductor system for transmitting electromagnetic waves.
  5. Device according to any one of the claims 1 to 4,
    characterized in that
    the dielectric is designed to serve not only for electrical coupling, but simultaneously also as a positive mechanical guide for the coupling faces that are supported to be rotatable relative to each other.
  6. Device according to any of the claims 1 to 5,
    characterized in that
    the coupling faces are mounted in rotational symmetry relative to the rotation axis of the device.
  7. Device according to claim 1,
    characterized in that
    the coupling faces are disposed radially to the rotation axis.
  8. Device according to claim 1,
    characterized in that
    the coupling faces are disposed axially to the rotation axis.
  9. Device according to claim 1,
    characterized in that
    the coupling faces extend along radial or axial directions, or combinations thereof.
  10. Device according to any one of the claims 1 to 9,
    characterized in that
    a plurality of transmission systems consisting of coupling faces and a dielectric are combined to form a single unit.
  11. Device according to any one of the claims 1 to 10,
    characterized in that
    the coupling faces contain structures for multi-channel signal transmission.
  12. Device according to any one of the claims 1 to 11,
    characterized in that
    the coupling faces are designed as printed circuit boards having coaxial conductor structures.
EP01960134A 2000-08-02 2001-08-02 Device for carrying out the non-contact rotational transmission of high-frequency signals Expired - Lifetime EP1307940B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10037747 2000-08-02
DE10037747A DE10037747A1 (en) 2000-08-02 2000-08-02 Arrangement for contactless rotation transmission of high-frequency signals
PCT/DE2001/002894 WO2002011231A1 (en) 2000-08-02 2001-08-02 Device for carrying out the non-contact rotational transmission of high-frequency signals

Publications (2)

Publication Number Publication Date
EP1307940A1 EP1307940A1 (en) 2003-05-07
EP1307940B1 true EP1307940B1 (en) 2006-06-07

Family

ID=7651129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01960134A Expired - Lifetime EP1307940B1 (en) 2000-08-02 2001-08-02 Device for carrying out the non-contact rotational transmission of high-frequency signals

Country Status (6)

Country Link
US (1) US7148773B2 (en)
EP (1) EP1307940B1 (en)
AT (1) ATE329377T1 (en)
AU (1) AU2001281719A1 (en)
DE (3) DE10037747A1 (en)
WO (1) WO2002011231A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007004514A1 (en) * 2007-01-24 2008-07-31 Schleifring Und Apparatebau Gmbh Two-channel multimode rotary transmitter
DE102007004517A1 (en) * 2007-01-24 2008-07-31 Schleifring Und Apparatebau Gmbh Two-channel multimode rotary transformer
DE102007026431B4 (en) * 2007-06-06 2009-04-23 Spinner Gmbh HF rotary coupling with lambda / 4-line between stator and rotor
EP2182705A4 (en) * 2007-10-18 2012-06-27 Nec Corp Portable communication apparatus
US20090284332A1 (en) 2008-05-15 2009-11-19 Silicon Valley Medical Instruments, Inc. Ivus system with rotary capacitive coupling
US8384605B2 (en) * 2009-02-25 2013-02-26 Sikorsky Aircraft Corporation Wireless communication between a rotating frame of reference and a non-rotating frame of reference
US9628170B1 (en) * 2016-01-26 2017-04-18 Google Inc. Devices and methods for a rotary joint with multiple wireless links
DE102017210783A1 (en) * 2017-06-27 2018-12-27 Mahle International Gmbh bearings
DE102019200485A1 (en) 2019-01-16 2020-07-16 Spinner Gmbh Swivel coupling

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2332529A (en) * 1940-10-01 1943-10-26 Hugh E Reppert Coaxial transmission line
US2678835A (en) * 1946-02-08 1954-05-18 Us Navy Rotating joint
US2763844A (en) * 1955-06-14 1956-09-18 Irving D Kruger Rotary contact for a coaxial line
DE3039358A1 (en) 1980-10-18 1982-05-19 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt SEMICONDUCTOR CONNECTION
GB9510829D0 (en) * 1995-05-22 1995-07-19 Racal Mesl Radar Limited Radio frequency coupler
US5781087A (en) * 1995-12-27 1998-07-14 Raytheon Company Low cost rectangular waveguide rotary joint having low friction spacer system
GB2328086B (en) 1997-07-18 2001-11-21 Transense Technologies Plc Rotary signal coupler

Also Published As

Publication number Publication date
DE10037747A1 (en) 2002-03-07
DE50110059D1 (en) 2006-07-20
US7148773B2 (en) 2006-12-12
ATE329377T1 (en) 2006-06-15
US20040051604A1 (en) 2004-03-18
DE10193088D2 (en) 2003-08-21
EP1307940A1 (en) 2003-05-07
AU2001281719A1 (en) 2002-02-13
WO2002011231A1 (en) 2002-02-07

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