EP4158800A1 - Système et procédé de transmission de données au moyen d'un flux lumineux, et unité technique - Google Patents

Système et procédé de transmission de données au moyen d'un flux lumineux, et unité technique

Info

Publication number
EP4158800A1
EP4158800A1 EP21722206.6A EP21722206A EP4158800A1 EP 4158800 A1 EP4158800 A1 EP 4158800A1 EP 21722206 A EP21722206 A EP 21722206A EP 4158800 A1 EP4158800 A1 EP 4158800A1
Authority
EP
European Patent Office
Prior art keywords
polarization
data
luminous flux
light
receiver
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.)
Pending
Application number
EP21722206.6A
Other languages
German (de)
English (en)
Inventor
Josef Schmidt
Zhidong Hua
Thomas Schäfer
Andreas WANJEK
Michael Lindenfelser
Marcel Hammann
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.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive GmbH and Co KG
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 SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP4158800A1 publication Critical patent/EP4158800A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/116—Visible light communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/50—Transmitters
    • H04B10/516—Details of coding or modulation
    • H04B10/532—Polarisation modulation

Definitions

  • the invention relates to a system for data transmission by means of a luminous flux, which comprises a transmitter for emitting a luminous flux in which the data to be transmitted are encoded, and a receiver for receiving the luminous flux emitted by the transmitter.
  • the invention relates to a method for data transmission by means of a luminous flux in a system according to the invention.
  • the invention also relates to a technical installation which comprises a system according to the invention, in which data transmission is carried out by means of a luminous flux using the method according to the invention.
  • a system and a method for determining the position of a vehicle within an installation are known from DE 102016010999 A1.
  • the system has a vehicle with a receiver module and a stationary transmitter module.
  • the transmission module has a light source and a first polarization filter, the first polarization filter being designed as a linear polarization filter, so that linearly polarized light can be transmitted by the transmission module.
  • the receiving module has a light sensor, a liquid crystal and a second polarization filter, the second polarization filter being designed as a linear polarization filter.
  • a system and a method for data transmission by means of visible light are known from DE 102018006988 B3.
  • the system has a receiver with an image sensor, the light-sensitive surface of which is scanned line by line, and a transmitter with a controllable light source which emits modulated light.
  • the document US 2010/0046957 A1 discloses an optical communication system and a method for transmitting an optical data signal.
  • the document US 2010/0329677 A1 discloses a method for restoring a signal which has two linear polarization states, as well as a device for carrying out the method.
  • the invention is based on the object of improving a system and a method for data transmission by means of a luminous flux.
  • the object is achieved by a system for data transmission by means of a luminous flux with the features specified in claim 1.
  • Advantageous refinements and developments are the subject of the subclaims.
  • the object is also achieved by a method for data transmission by means of a luminous flux with the features specified in claim 7.
  • Advantageous refinements and developments are the subject of the subclaims.
  • the object is also achieved by a technical system with the features specified in claim 15.
  • a system for data transmission by means of a luminous flux comprises a transmitter for emitting a luminous flux in which the data to be transmitted are encoded, and a receiver for receiving the luminous flux emitted by the transmitter.
  • the transmitter comprises a polarization device which generates the light flux with a time-varying data polarization, the data to be transmitted being encoded in the time-varying data polarization of the light flux generated by the polarization device.
  • the receiver comprises a polarization unit which detects the respective data polarization of the luminous flux.
  • the receiver further comprises an evaluation unit which decodes the data to be transmitted from the data polarization of the luminous flux recognized by the polarization unit.
  • the luminous flux emitted by the polarization device thus has a data polarization which represents a polarization direction of the luminous flux.
  • a specific data polarization is uniquely assigned to each specific date.
  • the data polarization is not only limited to horizontal and vertical, but can have a finer resolution. Depending on a resolution of the data polarization, several different data can thus be transmitted from the luminous flux. For example, one is Resolution of four or more different data polarizations over an angular range of 90 ° is conceivable.
  • the evaluation unit decodes the data to be transmitted, for example exclusively from the recognized data polarization. However, it is also conceivable that the evaluation unit decodes the data to be transmitted from a combination of the recognized data polarization and a further polarization.
  • the data polarization of the emitted luminous flux can be measured relatively precisely even with a relatively large distance between the transmitter and the receiver. Furthermore, only slight perspective distortions occur when the luminous flux emitted by the transmitter is received. Due to the change in data polarization over time, several different data can be transmitted serially over time.
  • the transmitter has a light source which generates unpolarized light and which radiates the unpolarized light onto the polarization device.
  • the light source is, for example, an LED or a light bulb. An LED consumes relatively little energy to generate unpolarized light.
  • the transmitter has a mirror which reflects existing ambient light, in particular sunlight, and radiates it onto the polarization device. Such a mirror does not consume any energy to reflect the light.
  • the polarization device has a polarizer which polarizes incident unpolarized light into polarized light and emits the polarized light.
  • the polarizer only lets through light components of the incident light with a defined polarization and filters out all other light components with other polarizations.
  • the polarization device has a polarization cell which can be controlled in such a way that the luminous flux with the time-variable data polarization is generated from incident polarized light.
  • the polarization cell is preferably arranged in such a way that the polarized light emitted by the polarizer is radiated onto the polarization cell. The data to be transferred are thus easily encoded into the luminous flux by appropriate control of the polarization cell.
  • the polarization cell has a liquid crystal which can be controlled by applying a control voltage in such a way that a polarization of incident polarized light is changed.
  • a control voltage By applying a time-varying control voltage to the liquid crystal, the luminous flux with the time-varying data polarization can thus be generated in the polarization cell.
  • the liquid crystal enables, depending on the applied control voltage, in particular a rotation of the polarization of the incident polarized light by an angle between 0 ° and 90 °. A change in the data polarization of the luminous flux can thus be carried out relatively quickly, as a result of which a high data transmission rate can be achieved. Furthermore, the liquid crystal only needs relatively little energy.
  • the polarization cell can therefore advantageously be operated with a battery or with solar cells, as a result of which the polarization cell can be operated independently.
  • the evaluation unit is designed in the form of a digital computer or in the form of a processor or in the form of an FPGA.
  • the polarization device of the transmitter In a method according to the invention for data transmission by means of a luminous flux in a system according to the invention for data transmission by means of a luminous flux, the polarization device of the transmitter generates a luminous flux with a time-varying data polarization, the data to be transmitted being encoded in the time-varying data polarization of the light flux generated by the polarization device are.
  • the respective data polarization of the luminous flux is detected by the polarization unit of the receiver, and the data to be transmitted are decoded by the evaluation unit of the receiver from the data polarization of the luminous flux detected by the polarization unit.
  • the luminous flux emitted by the polarization device thus has a data polarization which represents a polarization direction of the luminous flux.
  • a specific data polarization is uniquely assigned to each specific date.
  • the data polarization is not only limited to horizontal and vertical, but can have a finer resolution. Depending on a resolution of the data polarization, several different data can thus be transmitted from the luminous flux. For example, there is a resolution of four or more different data polarizations over a range of angles of 90 ° is conceivable.
  • the evaluation unit decodes the data to be transmitted, for example exclusively from the recognized data polarization. However, it is also conceivable that the evaluation unit decodes the data to be transmitted from a combination of the recognized data polarization and a further polarization.
  • the data polarization of the emitted luminous flux can be measured relatively precisely even with a relatively large distance between the transmitter and the receiver. Furthermore, only slight perspective distortions occur when the luminous flux emitted by the transmitter is received. Due to the change in data polarization over time, several different data can be transmitted serially over time.
  • unpolarized light is generated by a light source, and the unpolarized light is radiated onto the polarization device.
  • existing ambient light in particular sunlight, is reflected by a mirror and radiated onto the polarization device.
  • unpolarized light is radiated onto a polarizer of the polarization device.
  • the unpolarized light is polarized to polarized light by the polarizer, and the polarized light is emitted by the polarizer.
  • the polarizer allows only light components with a defined polarization of the incident light to pass through. All other light components with different polarizations are filtered out.
  • polarized light is radiated onto a polarization cell of the polarization device.
  • the polarization cell is controlled in such a way that the light flux with the time-varying data polarization is generated from the polarized light incident.
  • the polarized light emitted by the polarizer is preferably radiated onto the polarization cell.
  • the data to be transmitted are simply coded into the luminous flux by activating the polarization cell accordingly.
  • a liquid crystal of the polarization cell is controlled by applying a control voltage in such a way that a polarization of incident polarized light is changed.
  • the luminous flux with the time-varying data polarization is thus generated in the polarization cell.
  • the liquid crystal enables, depending on the applied control voltage, in particular a rotation of the polarization of the incident polarized light by an angle between 0 ° and 90 °. A change in the data polarization of the luminous flux can thus be carried out relatively quickly, as a result of which a high data transmission rate is achieved.
  • the luminous flux preferably comprises at least one data packet which has a plurality of time-serial data elements.
  • Each of the data elements has a specific data polarization, the data to be transmitted being encoded in the data polarizations of the data elements.
  • the data polarizations of the data elements are recognized by the polarization unit.
  • the data packet has a reference element which is serial in time to the data elements and which has a reference polarization.
  • the reference polarization of the reference element is recognized by the polarization unit, and the data element data to be transmitted are decoded by the evaluation unit from a combination of the data polarizations of the data elements and the reference polarization of the reference element.
  • the reference element thus has a reference polarization which serves as a reference direction for the relative alignment of the data polarization of each individual data element of the data packet.
  • the link between the data polarization and the reference polarization is, for example, the difference between the data polarization of the individual data element and the reference polarization.
  • the decoding of the data to be transmitted is independent of an alignment of the receiver to the transmitter.
  • the reference element preferably has the same duration as the data elements of the data packet.
  • a technical installation according to the invention comprises a system according to the invention for data transmission by means of a luminous flux, in which data transmission by means of a luminous flux is carried out with the method according to the invention for data transmission by means of a luminous flux.
  • the receiver is arranged in or on an autonomously driving vehicle which has a drive device, an electrical energy store for supplying the drive device and a control unit for controlling the drive device.
  • the drive device includes, for example, an electric motor, a gearbox and drive wheels.
  • the autonomously driving vehicle is, in particular, a driverless transport system for transporting objects within the technical system.
  • Figure 1 a schematic representation of a system for data transmission by means of a luminous flux
  • Figure 2 a schematic representation of a transmitter
  • Figure 3 a time representation of a data packet
  • Figure 4 an exemplary assignment of data to data polarizations
  • FIG. 5 an autonomously driving vehicle according to a first embodiment
  • FIG. 6 an autonomously driving vehicle according to a second embodiment
  • FIG. 7 an autonomously driving vehicle according to a third embodiment.
  • FIG 1 shows a schematic representation of a system 10 for data transmission by means of a luminous flux 20.
  • the system 10 for data transmission by means of a luminous flux 20 comprises a transmitter 14, which emits the luminous flux 20, in which the data to be transmitted are encoded, and a receiver 12, softer receives the luminous flux 20 emitted by the transmitter 14.
  • the transmitter 14 has a light source 8.
  • the light source 8 is, for example, an LED, a ceiling lamp or a light bulb which emits unpolarized light 22. It is also conceivable that the transmitter 14 has a mirror which reflects existing ambient light.
  • the transmitter 14 also has a polarization device 30.
  • the polarization device 30 emits the luminous flux 20 with a data polarization Q that changes over time.
  • the data to be transmitted are encoded in the time-variable data polarization Q of the luminous flux 20 emitted by the polarization device 30.
  • the receiver 12 comprises a polarization camera 1 which is able to detect a polarization of the incident light flux 20 with an angular resolution of, for example, 1 °.
  • the polarization camera 1 has an optical lens 2 and a polarization unit 16.
  • the receiver 12 also comprises a diaphragm 5.
  • the diaphragm 5 and the lens 2 are arranged in such a way that the light flux 20 which strikes the polarization unit 16 passes through the diaphragm 5 and the lens 2 beforehand.
  • the polarization unit 16 of the polarization camera 1 detects the respective data polarization Q of the luminous flux emitted by the polarization device 30 Areas of the polarization filter 3 impinging light.
  • the receiver 12 also includes an evaluation unit 6.
  • the evaluation unit 6 decodes the data to be transmitted from the data polarizations Q of the luminous flux 20 emitted by the polarization device 30, which the polarization unit 16 recognizes.
  • the evaluation unit 6 is designed, for example, in the form of a digital computer, a processor or an FPGA.
  • FIG. 2 shows a schematic representation of a transmitter 14 of the system 10 shown in FIG. 1 for data transmission by means of a luminous flux 20.
  • the transmitter 14 has the light source 8 and the polarization device 30.
  • the light source 8 radiates unpolarized light 22 onto the polarization device 30.
  • the polarization device 30 has a polarizer 33 and a polarization cell 35.
  • the unpolarized light 22 emitted by the light source 8 hits the polarizer 33.
  • the polarizer 33 polarizes the incident unpolarized light 22 to form polarized light 24 and radiates the polarized light 24 onto the polarization cell 35.
  • the polarization cell 35 has a first electrode 31, a second electrode 32 and a liquid crystal 37.
  • the liquid crystal 37 is arranged between the two electrodes 31, 32.
  • a voltage source which supplies an adjustable control voltage V, is connected between the two electrodes 31, 32. On the liquid crystal 37 is therefore that of control voltage V supplied by the voltage source.
  • the polarized light 24 radiates through the first electrode 31 and penetrates the liquid crystal 37.
  • the liquid crystal 37 rotates, depending on the applied control voltage V, the polarization of the incident polarized light 24 through an angle between 0 ° and 90 °. For example, with a control voltage V of 0 V, the polarization is rotated by 90 °, and with a control voltage V of 6 V, the polarization is rotated by 0 °. With a control voltage V between 0 V and 6 V, the polarization is rotated by an angle between 0 ° and 90 °. The relationship between the control voltage V and the angle through which the rotation takes place is generally not linear.
  • the liquid crystal 37 is thus controlled by applying the adjustable control voltage V in such a way that the polarization of the incident polarized light 24 is changed, in particular rotated.
  • the liquid crystal 37 of the polarization cell 35 By appropriate control of the liquid crystal 37 of the polarization cell 35, the luminous flux 20 with the time-variable data polarization Q is generated from the incident polarized light 24.
  • the data polarization Q of the luminous flux 20 can be changed by changing the control voltage V.
  • FIG. 3 shows a representation of a data packet 40 over time.
  • the time T is plotted on the abscissa and the data polarization Q is plotted on the ordinate.
  • the luminous flux 20 comprises a plurality of temporally serial data packets 40 which each have a plurality of temporally serial data elements 51.
  • the data packet 40 shown here also has a reference element 50.
  • Each of the data elements 51 has a specific data polarization Q.
  • the data to be transmitted are encoded in the data polarizations Q of the individual data elements 51.
  • the reference element 50 has a reference polarization Oref. In the present case, the reference element 50 is temporally before the data elements 51.
  • the reference element 50 and the data elements 51 have the same duration L.
  • FIG. 4 shows an example of an assignment of data d to data polarizations Q.
  • Each data element 51 transmits a data item d with m bits.
  • a specific data polarization ⁇ with 0 ° ⁇ Q ⁇ 90 ° is clearly assigned to each specific datum d with 0 ⁇ d ⁇ 2 m.
  • the data d are shown as two-digit binary numbers, and the associated data polarizations Q are given as angles.
  • the data polarization Q of the respective data element 51 is calculated, for example, for all data elements 51 of the data packet 40 as a function of the reference polarization ⁇ ref of the reference element 50 as follows:
  • the evaluation unit 6 decodes the data d of the data elements 51 to be transmitted from a combination of the data polarizations Q of the data elements 51 and the reference polarization 0ref of the reference element 50.
  • the reference polarization 0ref of the reference element 50 is equal to 0 °.
  • the data polarization Q of the data elements 51 is then calculated, for example, as follows:
  • the evaluation unit 6 decodes the data d of the data elements 51 to be transmitted from the data polarization Q of the data elements 51 recognized by the polarization unit 16.
  • FIG. 5 shows an autonomously driving vehicle 25 according to a first embodiment.
  • the vehicle 25 has a drive device, an electrical energy store for supplying the drive device and a control unit for controlling the drive device.
  • the drive device not explicitly shown here comprises, for example, an electric motor, a gear unit and drive wheels.
  • the vehicle 25 is located on a horizontally oriented floor in a technical installation, for example in a production plant.
  • the autonomously driving vehicle 25 is, in particular, a driverless transport system for transporting objects within the technical installation.
  • the technical installation has a system 10 for data transmission by means of a luminous flux 20, which is shown in FIG.
  • the vehicle 25 has the receiver 12 of the system 10.
  • the receiver 12 is oriented vertically.
  • the transmitter 14 of the system 10 is mounted on a ceiling above the vehicle 25, for example.
  • a luminous flux 20 which is emitted by the transmitter 14 can be received by the receiver 12.
  • FIG. 6 shows an autonomously driving vehicle 25 according to a second embodiment.
  • the vehicle 25 has a drive device, an electrical energy store for supplying the drive device and a control unit for controlling the drive device.
  • the drive device not explicitly shown here comprises, for example, an electric motor, a gear unit and drive wheels.
  • the vehicle 25 is located on a horizontally oriented floor in a technical installation, for example in a production plant.
  • the autonomously driving vehicle 25 is, in particular, a driverless transport system for transporting objects within the technical installation.
  • the technical installation has a system 10 for data transmission by means of a luminous flux 20, which is shown in FIG.
  • the vehicle 25 has the receiver 12 of the system 10.
  • the receiver 12 is oriented horizontally.
  • the vehicle 25 also has a mirror 26.
  • the transmitter 14 of the system 10 is mounted on a ceiling above the vehicle 25, for example.
  • the mirror 26 is arranged and aligned in such a way that a luminous flux 20, which is emitted by the transmitter 14, is deflected by the mirror 26 and can be received by the receiver 12.
  • FIG. 7 shows an autonomously driving vehicle 25 according to a third embodiment.
  • the vehicle 25 has a drive device, an electrical energy store for supplying the drive device and a control unit for controlling the drive device.
  • the drive device not explicitly shown here comprises, for example, an electric motor, a gear unit and drive wheels.
  • the vehicle 25 is located on a horizontally oriented floor in a technical installation, for example in a production plant.
  • the autonomously driving vehicle 25 is, in particular, a driverless transport system for transporting objects within the technical installation.
  • the technical installation has a system 10 for data transmission by means of a luminous flux 20, which is shown in FIG.
  • the vehicle 25 has the receiver 12 of the system 10.
  • the receiver 12 is oriented horizontally.
  • the transmitter 14 of the system 10 is mounted, for example, on a wall at the level of the vehicle 25.
  • a luminous flux 20 which is emitted by the transmitter 14 can be received by the receiver 12.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système de transmission de données au moyen d'un flux lumineux (20), comprenant un émetteur (14) pour émettre un flux lumineux (20), dans lequel les données à transmettre sont codées, et un récepteur (12) pour recevoir le flux lumineux (20) émis par l'émetteur (14). L'émetteur (14) comprend un dispositif de polarisation (30) qui génère le flux lumineux (20) avec une polarisation de données (Θ) qui peut changer dans le temps, lesdites données à transmettre étant codées dans la polarisation de données (Θ) qui peut changer dans le temps du flux lumineux (20) généré par le dispositif de polarisation (30) ; le récepteur (12) comprend une unité de polarisation (16) qui détecte la polarisation de données respective (Θ) du flux lumineux (20) ; et le récepteur (12) comprend une unité d'analyse (6) qui décode les données à transmettre à partir de la polarisation de données (Θ) du flux lumineux (20) détectée par l'unité de polarisation (16). L'invention concerne également un procédé de transmission de données à l'aide d'un flux lumineux (20) dans un système (10) selon l'invention et une unité technique qui comprend un système (10) selon l'invention et dans laquelle une transmission de données est effectuée à l'aide d'un flux lumineux (20) en utilisant le procédé selon l'invention, dans lequel le récepteur (12) est disposé dans ou sur un véhicule à conduite autonome (25) qui présente un dispositif d'entraînement, un dispositif de stockage d'énergie électrique pour alimenter le dispositif d'entraînement, et une unité de commande pour commander le dispositif d'entraînement.
EP21722206.6A 2020-05-28 2021-04-28 Système et procédé de transmission de données au moyen d'un flux lumineux, et unité technique Pending EP4158800A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020003227 2020-05-28
PCT/EP2021/061188 WO2021239377A1 (fr) 2020-05-28 2021-04-28 Système et procédé de transmission de données au moyen d'un flux lumineux, et unité technique

Publications (1)

Publication Number Publication Date
EP4158800A1 true EP4158800A1 (fr) 2023-04-05

Family

ID=75728856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21722206.6A Pending EP4158800A1 (fr) 2020-05-28 2021-04-28 Système et procédé de transmission de données au moyen d'un flux lumineux, et unité technique

Country Status (3)

Country Link
EP (1) EP4158800A1 (fr)
DE (1) DE102021002238A1 (fr)
WO (1) WO2021239377A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3144458A1 (fr) * 2022-12-23 2024-06-28 Valeo Vision Système de détection d’un véhicule automobile comportant un module d’émission et un module de réception d’un faisceau lumineux

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3284632A (en) * 1963-07-31 1966-11-08 Sylvania Electric Prod Polarization modulation and demodulation
US3415995A (en) * 1966-12-12 1968-12-10 Sylvania Electric Prod Polarization modulation optical communication system
IT1189657B (it) * 1986-04-10 1988-02-04 Cselt Centro Studi Lab Telecom Sistema di trasmissione in fibra ottica a modulazione di polarizzazione e rivelazione coerente eterodina
US6310707B1 (en) 1996-10-25 2001-10-30 Seiko Epson Corporation Optical wireless data communication system, and transmitter and receiver used therefor
US7599627B2 (en) 2001-05-31 2009-10-06 Teradvance Communications, Llc Method and system for a polarization mode dispersion tolerant optical homodyne detection system with optimized transmission modulation
JP4722564B2 (ja) * 2005-05-30 2011-07-13 京セラ株式会社 無線通信システム、無線発信装置、および無線受信装置
US8004675B2 (en) 2007-09-20 2011-08-23 Boss Nova Technologies, LLC Method and system for stokes polarization imaging
US20090128814A1 (en) 2007-11-21 2009-05-21 Bogdan Szafraniec Modulated polarizer-based polarimeter, and method for determining the polarization state of an optical signal
US8655191B2 (en) 2009-06-29 2014-02-18 Alcatel Lucent Symbol timing recovery in polarization division multiplexed coherent optical transmission system
WO2017205652A1 (fr) * 2016-05-27 2017-11-30 Schafer Aerospace, Inc. Système et procédé de communications laser d'espace libre par satellite à grande vitesse utilisant une commande de gain automatique
DE102016010999A1 (de) 2016-09-12 2018-03-15 Sew-Eurodrive Gmbh & Co Kg System und Verfahren zur Positionsbestimmung eines Fahrzeugs innerhalb einer Anlage
DE102018006988B3 (de) 2018-09-04 2019-08-14 Sew-Eurodrive Gmbh & Co Kg System und Verfahren zum Betreiben dieses Systems, aufweisend eine erste Kommunikationseinheit und eine zweite Kommunikationseinheit

Also Published As

Publication number Publication date
DE102021002238A1 (de) 2021-12-02
WO2021239377A1 (fr) 2021-12-02

Similar Documents

Publication Publication Date Title
DE3916362C2 (de) Anordnung zum Übertragen eines ein Informationssignal tragenden Lichtstrahls durch die Atmosphäre
DE102006005152B4 (de) Lichtschrankenanordnung
DE10146692B4 (de) Entfernungsbildsensor
DE102013001358B4 (de) System für eine Anlage und Verfahren zum Betreiben eines solchen Systems
EP2673619A1 (fr) Procédé et dispositif pour déterminer la transparence d'une vitre d'un véhicule
EP1487659A1 (fr) Combine d'instruments et ensemble equipe d'un combine d'instruments
EP1355128A1 (fr) Alignement automatique d'un senseur
WO2021239377A1 (fr) Système et procédé de transmission de données au moyen d'un flux lumineux, et unité technique
DE102018113848A1 (de) Optoelektronischer Sensor und Verfahren zur Erfassung von dreidimensionalen Bilddaten
WO2019121435A1 (fr) Système de lecture optique et procédé de calibrage du système de lecture optique
DE10202305B4 (de) Optischer Sensor
EP1421404A2 (fr) Dispositif de balayage par rayon d'une scene
EP4147381A1 (fr) Procédé et système de transmission de données au moyen de lumière
WO2010072199A1 (fr) Barrière lumineuse et procédé pour faire fonctionner une barrière lumineuse
DE102009045031A1 (de) Strahlungssensor für Sonnenkollektoren
DE102006010990B4 (de) Sicherheitssystem
DE102013018363B4 (de) Verfahren und System zur Datenübertragung in der Kraftfahrzeug-Produktion
DE102007014229B4 (de) Vorrichtung zur optischen Datenübertragung
EP1959271B1 (fr) Agencement de capteur optoélectrique et procédé de vérification du mode de fonctionnement et/ou de l'ajustement d'un agencement de capteur optoélectronique
WO2018234070A1 (fr) Dispositif lidar macroscopique
EP3769445A1 (fr) Système et procédé pour faire fonctionner un système comprenant au moins une première et une deuxième partie mobile
DE102018222701A1 (de) Sensoreinrichtung und Verfahren zum Betreiben einer Sensoreinrichtung für ein Fahrzeug
DE10153977A1 (de) System zur Erzeugung eines Entfernungsbildes mit elektromagnetischen Impulsen
DE102007059907A1 (de) Verfahren und Vorrichtung zur Projektion von Bilddaten mittels Laser
DE102019128710A1 (de) Beleuchtung eines Erfassungsbereichs und Verfahren zum Erfassen von Bilddaten

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20230102

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)