EP0862820B1 - Dispositif pour la transmission optique de signaux - Google Patents

Dispositif pour la transmission optique de signaux Download PDF

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Publication number
EP0862820B1
EP0862820B1 EP96942260A EP96942260A EP0862820B1 EP 0862820 B1 EP0862820 B1 EP 0862820B1 EP 96942260 A EP96942260 A EP 96942260A EP 96942260 A EP96942260 A EP 96942260A EP 0862820 B1 EP0862820 B1 EP 0862820B1
Authority
EP
European Patent Office
Prior art keywords
optical
transmission medium
optical transmission
movement
transmitting unit
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
Application number
EP96942260A
Other languages
German (de)
English (en)
Other versions
EP0862820A1 (fr
Inventor
Georg Lohr
Markus Stark
Hans Poisel
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.)
Schleifring und Apparatebau GmbH
Original Assignee
Schleifring und Apparatebau 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
Priority claimed from DE19543387A external-priority patent/DE19543387C1/de
Priority claimed from DE19543386A external-priority patent/DE19543386C1/de
Priority claimed from DE19543385A external-priority patent/DE19543385C1/de
Application filed by Schleifring und Apparatebau GmbH filed Critical Schleifring und Apparatebau GmbH
Publication of EP0862820A1 publication Critical patent/EP0862820A1/fr
Application granted granted Critical
Publication of EP0862820B1 publication Critical patent/EP0862820B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C23/00—Non-electrical signal transmission systems, e.g. optical systems
    • G08C23/06—Non-electrical signal transmission systems, e.g. optical systems through light guides, e.g. optical fibres

Definitions

  • the invention relates to optical devices Signal transmission between a transmitting unit and a Relatively mobile receiving unit, which has one of the light-conducting body, here as an optical transmission medium referred to, are optically coupled together.
  • optical Systems For data and signal transmission are often optical Systems used. These basically consist of one Transmitting unit and a receiving unit, both via a optical transmission medium are interconnected. is the optical transmission medium the free space or air so results in a light barrier-like arrangement.
  • optical fibers such as glass or plastic fibers used to guide the light.
  • optical fibers such as glass or plastic fibers used to guide the light.
  • the removal of the optical path, between transmitting and receiving unit constant. That means, that the amplitude of the received signal in the receiving unit is hardly subject to fluctuations over time. This results a consistent transmission quality.
  • the transmitter now goes through all positions starting from the Receiver to the end of the optical medium, so does the Runtime too.
  • the light comes to almost no runtime Receiver.
  • This abrupt runtime difference which during the transition can occur in the transferred Signals cause a phase jump.
  • This phase jump limits the transmissible bandwidth and can lead to transmission errors to lead.
  • optical transmission medium in the transmission of optical signals via a formed into a closed curve optical transmission medium is an overlap at the beginning and end of the optical medium unavoidable, provided no failure of the Transfer in this position can be accepted.
  • the first signal reaches after a short distance and thus also short time the receiver.
  • the second signal arrives after passing through a longer distance and thus with a big one Delay the receiver. Both signals are now superimposed and give a wrong sum signal. This will be the Transmission negatively affected.
  • the signal propagation time equals half Period results in an extinction of the signal. Meaningful data transfer is no longer possible here.
  • EP-A-0 149 280 discloses an arrangement for data transmission between two relatively rotatable parts described.
  • a transmitter feeds light into a hollow cylindrical one and on the inside mirrored mirror.
  • At least two receiving transducers are provided whose output signals supplied to the inputs of an OR circuit are.
  • This arrangement has the disadvantage of bandwidth limitation as well as very strong signal amplitudes due to the high attenuation of the long path length of the transmission path.
  • the invention is based on the object, a device for optical signal transmission between a transmitting unit and a relatively movable receiving unit, the over an optical transmission medium are coupled together, in such a way that the aforementioned disturbing influences largely switched off on the transmission quality should be.
  • the Transmission quality independent of relative movements between Transmitter and receiver unit i. that no the data transmission interfering signal overlaps at the place of Receiving unit occur.
  • the device should have a require little space and cost and in particular be suitable for broadband signal transmission.
  • the receiving unit at least one optical Receiver has that of an optical transmission medium whose length is shorter than that of an optical transmitter traveled path relative to the transmission medium, and that the transmitting unit has at least two optical Transmitter, the so in the longitudinal direction of movement spaced apart so that the light at least an optical transmitter coupled into the transmission medium.
  • This subject matter of the invention also relates to an optical signal transmission between moving parts.
  • the Movement can be circular, linear, or any other take any curve, as long as a sufficient Signal coupling from the transmitting unit to the optical transmission medium is guaranteed.
  • path length of Movement refers to linearly moving parts Length of the path along which the transmitting unit and receiving unit can be moved against each other.
  • circular Movements refers to the corresponding share of the Circumference of the circle, however, to the full extent of the circle. This also applies to any other curve along one of them Movement can take place.
  • the optical Path length be made as short as possible.
  • optical signals with different maturities the receiving unit to reach can be safely prevented optical signals with different maturities the receiving unit to reach.
  • optical transmitter with little effort and low Costs are producible while optical receivers alone due to the broadband amplifier very elaborate and are expensive.
  • an optical medium is not used, in that on the whole way of moving from a transmitter Light can be coupled, but it will be a short used optical medium, which is only part of the path length covers. So that on the whole path length an optical transmission becomes possible, are several optical transmitters in the transmitting unit available. These are arranged so that always at least one optical transmitter illuminates the optical medium. This is a seamless signal transmission on the total path length possible.
  • the receivers of the receiving unit are not as usual at the end of the sections of optical media, but roughly arranged in the middle of the sections of the optical media.
  • the transit times of the optical signals of both Ends of the optical medium the same size.
  • the optical transmitters of the transmitting unit are then arranged so that the distances between them are so great that as soon as a transmitter is an optical Medium leaves, just a second transmitter on the other side of this optical medium approaches. This is one seamless signal transmission possible.
  • the receiving unit contains several optical receivers each connected to an optical medium.
  • the Receiving unit is designed such that the signals of the optical receivers are linked together so that a higher signal level or higher reliability Redundancy can be achieved.
  • the Signals from several optical receivers can be added to overall a higher signal level and less noise to obtain.
  • several signals can be combined to enable redundant transmission, so that in case of failure of a transmitter, an optical medium or also a receiver's transmission over another way still possible.
  • Another embodiment relates to an arrangement in which the transmitting unit contains a position sensor.
  • This position sensor Determines which optical transmitter is watching located above an optical medium. This will be the corresponding one optical transmitter signals. This allows the optical transmitters activate the full transmit power and optical Transmit signals. He leaves the area of the optical Medium, he is signaled to leave and he can reduce its transmission power or even completely switch off. With this arrangement, the total power consumption of the transmission system is reduced. By switching off the Transmitter also increases their life and production of electromagnetic interference in the powerful Transmission drivers are reduced.
  • the transmitting unit has at least as many optical transmitters as signal channels present are.
  • the transmitting unit and / or the receiving unit is now designed so that they also have a selector switch contains, which is controlled by a position sensor. Of the Position sensor tells the selector switch which optical Transmitter just signals over the optical medium and the associated receiver on a particular logical signal channel can transfer. It is important that every signal channel is transmitted via a defined path. The transmission path may vary depending on the position of the transmitting and receiving unit vary. It only has to be ensured that z. B. the Signals of the channel 1 on the side of the transmitting unit also for Channel 1 can be transmitted on the side of the receiving unit.
  • a selector switch on the side of the Sender unit is present, are displayed. Is located z. As the transmitter 1 on the receiver 1, so is the logical signal channel 1 from the selector switch to the transmitter 1 connected through. Now the device moves a bit continue, so at a later time the transmitter 2 the receiver 1 stand. Now the selector switches the Signals of the signal channel 1 to the transmitter 2, so that this can transmit its signals back to the receiver 1. Emotional The whole arrangement in turn a little further, so is at a later time transmitter 3 above the receiver 1. Now, the selector switch the signal channel 1 to the transmitter 3, so that this again signals to the receiver 1 can transmit.
  • the corresponding scheme applies to all other transmitters, receivers and signal channels as well.
  • the transmission medium used a photoconductive fiber.
  • This fiber can work accordingly the prior art as glass fiber, plastic fiber or fiber of another photoconductive material be educated.
  • the transmission medium can be light-guiding molding.
  • a light-conducting Liquid used as a transmission medium.
  • a further embodiment of the device according to the invention is based on the light beam propagation within the optical transmission medium in such a way that either optical signals on different Because of within the transmission medium in the way spread that they are the same at the place of the receiving unit Times arrive so that they are put together into a single signal or that the transmission medium is in a way that is designed for a separate spatial Signal transmission of the individual light signals is ensured to avoid signal overlaps.
  • a further advantageous embodiment is that in the case of a linear movement between transmitting unit and Receiving unit, the transmission medium also linear is formed, and preferably parallel to the direction of movement is arranged.
  • a further advantageous embodiment is that in the case of a circular movement between the transmitting unit and receiving unit, the transmission medium also circular is formed, and preferably parallel to the direction of movement is arranged.
  • the transmission medium from a circular arranged optical fiber consisting of a fluorescent dye is doped. By this doping can light be coupled at any point of the fiber.
  • the transmission medium interrupted at least at one point, by deriving the transit times of the optical signals in both directions the transmission medium to the receiving unit equal are big.
  • This device is based on the idea that a desired independence of bandwidth from the Signal propagation times can only be achieved if prevented is that signals in different ways with different Runtime reach the recipient. This means that the independence of the bandwidth from the signal delays guaranteed, provided that only a single signal is the receiver reached. This is e.g. at a linear distance the Case. Similarly, independence can be achieved if several signals arrive at the receiver, but all signals have the same terms to the receiver.
  • Another embodiment results from the fiber with doped with a fluorescent dye, so that the Coupling of light at each position of the transmitting unit becomes particularly easy along the curve in the fiber.
  • Figure 1 shows an inventive arrangement consisting of a transmitting unit 1 and a receiving unit 2, connected with an optical medium 4.
  • the transmitting unit has several, but at least two optical transmitters, of which here by way of example some (3A, 3B, 3C, 3D) are shown as such are designed to be optical information in the optical Can couple medium. These transmitters are arranged that in each case at least one transmitter in the optical Medium coupled.
  • the position sensor P determines the position the optical transmitter and signals the stations the Location over an optical medium such that these then their Enable transmit power.
  • the transmitting unit includes a selection switch A, which establishes the logical association between the logical signal channels, transmitters and receivers based on the information of the position sensor P.
  • the receiving unit 2 includes a plurality of optical receivers (5A, 5B, 5C) with associated optical transmission media (4A, 4B, 4C), some of which are exemplified herein, but at least one for each logical signal channel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Communication System (AREA)

Claims (7)

  1. Dispositif pour la transmission optique de signaux entre une unité émettrice (1) et une unité réceptrice (2), qui sont mobiles l'une relativement à l'autre et qui sont couplées, l'une à l'autre, via un milieu de transmission optique (4),
    caractérisé en ce que
    ladite unité réceptrice comprend au moins un récepteur optique (5A, 5B, 5C) affecté à un milieu de transmission optique, dont la longueur a une dimension plus courte que la longueur de la voie du mouvement, et en ce que ladite unité émettrice comprend au moins deux émetteurs optiques espacés, l'un de l'autre, le long de la direction du mouvement d'une telle manière, que la lumière d'au moins un émetteur optique se couple dans ledit milieu de transmission optique, et en ce que ledit milieu de transmission optique est conçu sous forme d'une fibre optique, d'une fibre optique dopée d'une matière colorante fluorescente, d'un corps moulé optique ou d'une liquide optique.
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    ledit récepteur optique est disposé au centre dudit milieu de transmission optique d'une telle manière, que les temps de transit des signaux optiques à partir des deux extrémités dudit milieu de transmission optiques soient de la même grandeur.
  3. Dispositif selon la revendication 1 ou 2,
    caractérisé en ce que
    lesdits émetteurs optiques de ladite unité émettrice sont espacés l'un de l'autre par une telle distance, que, dès qu'un émetteur sort dudit milieu de transmission optique par son mouvement, un autre émetteur s'approche, à ce moment, à l'autre côté dudit milieu de transmission optique, en continuant ainsi la transmission des données.
  4. Dispositif selon une quelconque des revendications 1 à 3,
    caractérisé en ce que
    ladite unité émettrice comprend un détecteur de position (P), qui engendre un signal d'activation pour ceux émetteurs optiques, qui se trouvent, à ce moment, à la proximité d'un milieu de transmission optique.
  5. Dispositif selon une quelconque des revendications 1 à 4,
    caractérisé en ce que
    plusieurs unités réceptrices sont disposées pour des voies de signaux différentes, au-dessus desquelles est disposée une pluralité respective des émetteurs optiques, et en ce qu'un détecteur de position respectif (P) et un commutateur sélecteur (A) sont disposés dans ladite unité émettrice et/ou réceptrice, qui est commandable via ledit détecteur de position d'une telle façon, qu'une transmission de signaux par plusieurs voies, indépendante de la position, soit possible.
  6. Dispositif selon une quelconque des revendications 1 à 5,
    caractérisé en ce que
    ledit milieu de transmission optique a une configuration linéaire et est disposé, au cas d'un mouvement linéaire, entre ladite unité émettrice et ladite réceptrice, de préférence en parallèle à cette direction de mouvement.
  7. Dispositif selon une quelconque des revendications 1 à 5,
    caractérisé en ce que
    ledit milieu de transmission optique a une configuration circulaire et est disposé, au cas d'un mouvement circulaire, entre ladite unité émettrice et ladite réceptrice, de préférence en parallèle à cette direction de mouvement.
EP96942260A 1995-11-21 1996-11-21 Dispositif pour la transmission optique de signaux Expired - Lifetime EP0862820B1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE19543387A DE19543387C1 (de) 1995-11-21 1995-11-21 Vorrichtung zur optischen Signalübertragung
DE19543386A DE19543386C1 (de) 1995-11-21 1995-11-21 Vorrichtung zur breitbandigen optischen Signalübertragung
DE19543386 1995-11-21
DE19543385 1995-11-21
DE19543387 1995-11-21
DE19543385A DE19543385C1 (de) 1995-11-21 1995-11-21 Vorrichtung zur optischen Signalübertragung
PCT/DE1996/002223 WO1997019529A1 (fr) 1995-11-21 1996-11-21 Dispositif pour la transmission optique de signaux

Publications (2)

Publication Number Publication Date
EP0862820A1 EP0862820A1 (fr) 1998-09-09
EP0862820B1 true EP0862820B1 (fr) 2005-04-06

Family

ID=27215682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96942260A Expired - Lifetime EP0862820B1 (fr) 1995-11-21 1996-11-21 Dispositif pour la transmission optique de signaux

Country Status (5)

Country Link
US (1) US6650843B1 (fr)
EP (1) EP0862820B1 (fr)
AU (1) AU1138297A (fr)
DE (1) DE59611213D1 (fr)
WO (1) WO1997019529A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625870A1 (de) * 1996-06-27 1998-01-08 Schleifring & Apparatebau Gmbh Vorrichtung zum Empfang optischer Signale mit einem lichtleitenden Gegenstand
US6246810B1 (en) 1998-06-16 2001-06-12 Electro-Tec Corp. Method and apparatus for controlling time delay in optical slip rings
US6757494B2 (en) * 2000-12-22 2004-06-29 Nortel Networks Limited Wavelength routing in a photonic network
DE10245450B4 (de) * 2002-09-27 2018-06-14 Schleifring Gmbh Vorrichtung und Verfahren zur Übertragung digitaler Signale zwischen beweglichen Einheiten mit variabler Übertragungsrate
DE10260940B3 (de) * 2002-12-20 2004-11-25 Schleifring Und Apparatebau Gmbh Vorrichtung und Verfahren zur breitbandigen Übertragung digitaler optischer Signale zwischen beweglichen Einheiten
WO2005117706A1 (fr) * 2004-06-03 2005-12-15 Siemens Aktiengesellschaft Dispositif pour la transmission sans contact de signaux et de donnees de mesure dans un tomodensitometre
DE102005027632B4 (de) * 2005-03-31 2009-09-24 Schleifring Und Apparatebau Gmbh Mehrkanal-Datenübertragungssystem für Computertomographen
JP4851521B2 (ja) 2006-04-28 2012-01-11 ムーグ インコーポレーテッド 光ロータリ・ジョイント、光ロータリ・ジョイントを適切に位置合せする取付け方法、及び光ロータリ・ジョイントに使用される光反射体組立体
US7672594B2 (en) * 2006-12-06 2010-03-02 Motorola, Inc. Optical communication system with light guide having variable slidable point of entry or exit
US8267598B2 (en) * 2006-12-06 2012-09-18 Motorola Mobility Llc Point to point optical communication system for conveying signals between multiple housings of a device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2846526A1 (de) * 1978-10-25 1980-05-08 Siemens Ag Vorrichtung zum uebertragen von signalen
DE3400361A1 (de) * 1984-01-07 1985-07-18 Philips Patentverwaltung Gmbh, 2000 Hamburg Anordnung zur datenuebertragung zwischen zwei relativ zueinander drehbaren teilen
FR2600879A1 (fr) * 1986-07-07 1988-01-08 Thomson Csf Appareil de tomographie assiste par ordinateur.

Also Published As

Publication number Publication date
WO1997019529A1 (fr) 1997-05-29
EP0862820A1 (fr) 1998-09-09
US6650843B1 (en) 2003-11-18
DE59611213D1 (de) 2005-05-12
AU1138297A (en) 1997-06-11

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