EP2434842B1 - Procédé de localisation de sources lumineuses, programme informatique et unité de localisation - Google Patents

Procédé de localisation de sources lumineuses, programme informatique et unité de localisation Download PDF

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Publication number
EP2434842B1
EP2434842B1 EP11181673.2A EP11181673A EP2434842B1 EP 2434842 B1 EP2434842 B1 EP 2434842B1 EP 11181673 A EP11181673 A EP 11181673A EP 2434842 B1 EP2434842 B1 EP 2434842B1
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Prior art keywords
light sources
sequence
light
image
arrangement
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EP11181673.2A
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German (de)
English (en)
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EP2434842A1 (fr
Inventor
Philipp van Beeck
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Osram GmbH
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Traxon Technologies Europe GmbH
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/135—Controlling the light source in response to determined parameters by determining the type of light source being controlled
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/155—Coordinated control of two or more light sources
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/198—Grouping of control procedures or address assignation to light sources
    • H05B47/199—Commissioning of light sources

Definitions

  • a method for locating light sources is given.
  • a computer program adapted to carry out such a method and a localization unit for such a method are provided.
  • the publication US 2003/0057887 A1 relates to an apparatus and method for controlling a lighting system.
  • An object to be solved is to specify a method with which a spatial assignment to logical addresses can be automated for a plurality of light sources of an arrangement.
  • this serves for the localization of light sources of an arrangement, wherein the arrangement comprises a plurality of light sources.
  • Localization means in particular that a two-dimensional or three-dimensional image is created by an arrangement of the light sources, wherein in the image the light sources of the arrangement are preferably arranged and / or detected according to their real position in space and the light sources in the image via a unique identifier or Address are identifiable.
  • localization may mean that a two-dimensional or three-dimensional model of the real, three-dimensional arrangement of the light sources is created.
  • the model which is in particular a computer model, can preferably be used for targeted activation of the light sources.
  • the light sources to be located are semiconductor light sources such as light-emitting diodes or laser diodes.
  • the light sources may be exclusively semiconductor light sources or else a mixture of semiconductor light sources and high-pressure lamps, halogen lamps, incandescent lamps and / or fluorescent lamps.
  • the arrangement or a part of the arrangement in which the light sources are to be located has more than ten light sources, preferably more than 100 light sources or more than 500 light sources or more than 1000 light sources.
  • the light sources are preferably connected in such a way that they can be controlled individually and independently of each other.
  • a plurality of light sources can each be combined to form a group, wherein individual groups are preferably independently controllable.
  • this comprises the step of establishing a list of the light sources of the arrangement or of the part of the arrangement.
  • Each of the light sources here has a unique digital identifier or address, short ID or unique ID.
  • the digital identifier comprises a bit sequence.
  • the identifier has at least 16 bits, preferably at least 32 bits or at least 48 bits. All the light sources to be located and their identification are listed in the list.
  • this comprises the step of simultaneously controlling the light sources, so that each of the light sources emits a luminous sequence in accordance with the bit sequence of the identifier associated with the respective light source.
  • all the light sources emit a brightness predetermined for that clock by the control signal, that is to say the predetermined luminous state corresponding to one bit from the bit sequence.
  • the duration of a clock is greater than the time required until all the light sources emit in accordance with the control signal.
  • the light sequences of all light sources are running preferably parallel and correlated, ie synchronously, simultaneously and in the same clock, from. All light sources simultaneously emit a brightness, for example, corresponding to one tenth bit of the bit sequence.
  • each of the light sources to be located emits a luminous sequence corresponding to the bit sequence of the identifier belonging to the light source means that the luminous states emitted by the individual light sources correspond to the bit sequence of the respective light source over the course of time.
  • the respective light source is thus switched on, for example, at a 1 in the bit sequence and turned off at a 0 in the bit sequence.
  • the switch-on and the switch-off are thus predetermined by the individual consecutive bits of the bit sequence. For example, if part of the bit sequence is 1001, then in the first clock, the associated light source is turned on, off in the second clock, off in the third clock, and turned on again in the fourth clock.
  • this comprises the step of recording an image sequence of the arrangement with an image capture device.
  • the image recording device is preferably a digital image recording device such as a digital camera, for example a so-called webcam.
  • the image sequence is correlated with the luminous sequence.
  • the sequence of images has a sequence of individual images, and the sequence of images is specifically matched to the luminous sequences. For example, per measure, especially towards the end of the bar, exactly one picture recorded.
  • Each of the luminous states of the parallel-running luminous sequences is preferably detected by one of the images.
  • the image sequence represents a recording of the luminous sequences by the image recording device, in particular at specific points in time.
  • each of the light sources emits a luminous sequence with luminous states corresponding to the bit sequence of the identifier over time
  • the light sources in the image sequence can be assigned to an identifier and can be uniquely localized.
  • the method comprises the step of specifying one or more starting points, each starting point being identified by one or more starting points is formed by a plurality of specific light sources. If a two-dimensional model of the arrangement is created, the positions of the light sources can be referenced to this starting point in the presence of a starting point. Preferably, a spatial position of the starting point in the arrangement is known. It is possible that the light source, which represents the starting point, is first localized and then a referencing of the further light sources takes place thereon. Likewise, the starting point may be determined prior to driving the light sources with the bit sequence, for example by a dedicated light up, and aligning about an image center of the images and / or the imaging device thereon. Furthermore, it is possible that at least three starting points are determined whose spatial position is known to each other. This makes it possible to determine the distance of the image recording device to the starting points and to specify a metric.
  • this comprises a step in which all the light sources are switched on together at least once and switched off at least once together.
  • the light sources are preferably switched on several times in succession and switched off again.
  • the light source areas are then those areas, preferably limited to certain pixels or pixels in the images, in which a brightness is modulated in accordance with the turn-on and turn-off.
  • at least one of the light sources or exactly one of the light sources of the arrangement is preferably imaged in the light source regions.
  • the images of the image sequence preferably records a luminous sequence of one of the light sources.
  • an output image of the arrangement is subtracted from all images of the image sequence.
  • all light sources are preferably switched off.
  • the output image can also be a plurality of individual images with light sources switched off, which are averaged over, for example, to efficiently subtract a fluctuating background brightness in the images of the image sequence.
  • a profile of a brightness of the light source regions is compared with the bit sequence of the identifier. If, for example, one of the light source areas in consecutive pictures of the picture sequence first appears bright, then dark, again dark and then bright again, a bit sequence of 1001 is assigned to this curve of the brightness. This bit sequence is compared with the bit sequence of the identifier. If the bit sequence corresponds to the bit sequence from the course of the brightness, the corresponding light source with the associated unique identifier or the unique bit sequence can be unambiguously assigned to the corresponding light source region.
  • the bit sequence comprises at least 16 bits, preferably at least 32 bits or at least 48 bits.
  • At least one of the light source regions comprises a plurality of pixels the pictures. From the plurality of pixels, one of the pixels is preferably selected for comparison of the luminous sequence with the bit sequence.
  • the selected pixel is the pixel of maximum brightness or a pixel located centrally in the plurality of pixels.
  • each image of the image sequence is assigned exactly to a lighting state of the lighting sequences.
  • a number of the images of the image sequence is equal to a number of the luminous states of the luminous sequences and equal to a number of bits of the bit sequence. If the bit sequence comprises, for example, 32 bits, the image sequence also comprises 32 images and each of the luminous sequences comprises 32 luminous states.
  • the bit sequence includes the complete, unique identifier.
  • the bit sequence and the identifier may be identical.
  • further bit sequences to precede and / or follow before or after the bit sequence.
  • the bit sequence precedes an initiation sequence and / or a checksum sequence.
  • At least two image recording devices are used. As a result, a three-dimensional detection of the light sources is possible.
  • the arrangement of the light sources is detected three-dimensionally, wherein only a single image recording device is used, which is displaced and then the light sources are then driven again according to the bit sequence. That is, the image pickup device is first brought to a first position and then to a second position, wherein a spatial position of the positions to each other is known. As a result, a stereoscopic image of the arrangement is also possible.
  • the light sources are activated several times in succession with the bit sequence, and in each case only a part of the arrangement is detected by the at least one image recording device.
  • an image sequence is directed only to a part of the arrangement. Remaining parts of the arrangement can be detected by further image sequences. By juxtaposing several image recording areas of the individual image sequences, all the light sources of the arrangement can then be localized.
  • the arrangement of the light sources is provided for illuminating or for illuminating a building part.
  • the arrangement of the light sources is attached to a building part or set up for attachment to a building part.
  • the arrangement can thus be part of a lighting system for architectural lighting.
  • the computer program comprises a program code, by which a method according to at least one of the preceding Embodiments is executed when the computer program is executed in a computer. Features of the method are therefore also disclosed for the computer program and vice versa.
  • a localization unit for locating light sources of a lighting system.
  • the location system includes at least one computer and a data link configured to be connected to the array of the plurality of light sources of the lighting system.
  • the light sources or groups of light sources can be controlled individually.
  • the localization unit includes at least one digital image capture device.
  • the localization unit is further configured to execute a method according to one of the preceding embodiments and / or a corresponding computer program. Features of the method and of the computer program are therefore also disclosed for the localization unit and vice versa.
  • FIG. 1 schematically illustrates an illumination system 5 with an arrangement 10 with a plurality of light sources 1 illustrated.
  • Such lighting systems 5 are in the document WO 2010/088887 A2 as well as in the publication DE 10 2009 007 505 A1 specified.
  • the light sources 1 of the illumination system 5 are, for example, semiconductor light sources such as light-emitting diodes. Several of the light sources 1 are connected to a drive device 8 via a data line 7a.
  • the data line 7a is in particular a control bus which can be operated via an RDM protocol or an RDM-like protocol.
  • the illumination system 5 comprises a plurality of drive devices 8. The number of drive devices 8 and the light sources 1 is shown in FIG FIG. 1 only roughly illustrated.
  • the control devices 8 are connected via a further data line 7b, for example via an Internet connection or via a wireless radio link, to a control unit 9.
  • the control unit 9 is, for example, a computer.
  • the control unit 9 outputs control signals to the drive devices 8, which are prepared by the drive devices 8 and connected to the Light sources 1 can be forwarded. For example, time-variable illumination patterns can be displayed by the illumination system 5.
  • a localization unit 4 is connected to the lighting system 5.
  • the data connection 3 is a wired connection or a wireless radio connection.
  • the localization unit 4 comprises a computer 2, on which a program with a method for localizing the light sources 1 is implemented. Furthermore, an image recording device 6 is connected to the computer 2.
  • the image recording device 6 is preferably a so-called webcam.
  • a distance of the arrangement 10 to the image recording device 6 is preferably selected such that individual light sources 1 can be resolved by the image recording device 6.
  • the localization unit 4 has two or more image recording devices 6.
  • FIG. 2 an embodiment of a method for the localization of the light sources 1 is schematically illustrated. Very simplified, the arrangement 10 according to FIG. 2A only three light sources 1a, 1b, 1c.
  • a list L is prepared in which all light sources 1a, 1b, 1c and their identifiers 14a, 14b, 14c are listed.
  • the Identifiers 14a, 14b, 14c allow unambiguous, logical identification and addressing of the light sources 1a, 1b, 1c of the arrangement 10.
  • the identifiers 14a, 14b, 14c schematically each only 4 bits.
  • the identifiers 14a, 14b, 14c preferably comprise at least 32 bits or at least 48 bits, so that even with a very large number of light sources 1 of the arrangement 10, there are unique identifiers 14a, 14b, 14c.
  • the list L is created, for example, using an RDM protocol or an RDM-like protocol. In this step of the method, therefore, all light sources 1a, 1b, 1c of the arrangement as well as their identifiers 14a, 14b, 14c are detected.
  • FIG. 2C an image P of the arrangement 10 is shown.
  • the image P is taken with the image pickup device 6 of the localization unit 4, cf.
  • FIG. 1 an activation of the light sources 1a, 1b, 1c as a function of time t is illustrated.
  • a profile of a brightness I of the light sources 1a, 1b, 1c that is to say luminous sequences 11a, 11b, 11c of the individual light sources 1a, 1b, 1c, is plotted.
  • the light sources 1a, 1b, 1c are driven simultaneously and synchronously with a specific clock rate, see FIG. 2D , For each bar an image P1-P10 is recorded. To reduce the background brightness, an output image is preferably subtracted from all the images P1-P10 prior to the further processing of the images P1-P10, with all the light sources 1a, 1b, 1c being switched off in the output image.
  • the output image is, for example, the image P6 or an image taken before the introduction sequence 13.
  • a control signal having an introduction sequence 13 with, for example, six successive bits of the sequence 101010 is jointly applied to all the light sources 1a, 1b, 1c in common.
  • the light sources 1a, 1b, 1c are therefore switched on together three times in succession and then switched off together.
  • Light source regions 12a, 12b, 12c identifiable.
  • the light source regions 12a, 12b, 12c are those regions in the image P in which the light sources 1a, 1b, 1c are imaged. From the light source regions 12a, 12b, 12c, for example, a single pixel, English pixel, is used to represent the luminous sequences 11a, 11b, 11c, cf.
  • FIG. 2D is used to represent the luminous sequences 11a, 11b, 11c, cf.
  • the light sources 1a, 1b, 1c are driven synchronously according to their individual identifiers 14a, 14b, 14c or with at least one bit sequence from the identifiers 14a, 14b, 14c ,
  • the luminous sequence 11a is recorded with the bit sequence 0101 from the flag 14a.
  • Each of the images P7-P10 is associated with exactly one luminous state M in the luminous sequences 11a, 11b, 11c.
  • the temporal sequence of the luminous states M is correlated with the images P1-P10 of the image sequence one to one.
  • the identifiers 14a, 14b, 14c occur in the time course of the brightnesses I and thus in the individual luminous sequences 11a, 11b, 11c in the light source regions 12a, 12b, 12c, the light source region 12a of the light source 1a, the light source region 12b of FIG Light sources 1c and the light source region 12c of the light source 1b uniquely assign, in FIG. 2D symbolized by a double arrow.
  • the identifiers 14a, 14b, 14c may be followed by a further sequence of bits, for example a checksum sequence 15.
  • a duration of the clocks is for example about 200 ms. In other words, then a time interval between two consecutive images P is also about 200 ms.
  • a sequence of only 10 bits is applied to the light sources 1a, 1b, 1c.
  • a practical sequence of bits applied to the light sources includes, for example, a 16-bit initiation sequence, a 48-bit unique identifier, and a 16-bit checksum sequence, corresponding to a total of 80-bit sequence.
  • 48-bit identifier is a very large number of light sources uniquely addressable.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Optical Communication System (AREA)

Claims (14)

  1. Procédé de localisation de sources lumineuses (1) comprenant les étapes consistant à :
    - établir une liste (L) de sources lumineuses (1) d'un dispositif (10) comprenant une pluralité de sources lumineuses (1), chacune des sources lumineuses (1) comprenant un identifiant numérique unique (14) comportant une séquence binaire,
    - commander simultanément les sources lumineuses (1) de manière à ce que chacune des sources lumineuses (1) émette une séquence lumineuse (11) d'états lumineux (M) se suivant mutuellement en correspondance avec la séquence binaire de l'identifiant (14) appartenant à la source lumineuse respective (1), et
    - acquérir une séquence d'images du dispositif (10) au moyen d'un appareil de prise de vue (6) fonctionnant numériquement pendant la commande, une suite d'images (P) de la séquence d'images étant amenée à concorder avec une suite d'états lumineux (M) des séquences lumineuses (11),
    caractérisé en ce que des zones de sources lumineuses (12) sont déterminées par une activation et une désactivation communes des sources lumineuses (1) dans les images (P) de la séquence d'images, une image d'au moins l'une des sources lumineuses (1) étant formée dans chacune des zones de sources lumineuses (12),
    au moins l'une des zones de sources lumineuses (12) comprenant une pluralité de pixels provenant des images (P) et l'un de ces pixels de la zone de sources lumineuses (12) étant sélectionné pour une comparaison de l'évolution de la luminance (I) avec l'identifiant (14).
  2. Procédé selon la revendication précédente, dans lequel toutes les sources lumineuses (1) sont activées en commun et désactivées en commun plusieurs fois l'une après l'autre.
  3. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'identifiant (14) comprend au moins 48 bits.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'évolution temporelle d'une luminance (I) des séquences lumineuses (11) dans les zones de sources lumineuses (12), enregistrée dans la séquence d'images, est comparée à la séquence binaire et/ou à l'identifiant (14).
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel le pixel sélectionné est un pixel placé centralement dans la pluralité de pixels.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel une image de sortie du dispositif (10) est soustraite à la totalité des images (P) de la séquence d'images, toutes les sources lumineuses (1) étant désactivées dans le cas de l'image de sortie.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel un nombre des images (P) de la séquence d'images est égal à un nombre des états lumineux (M) des séquences lumineuses (11) et est égal à un nombre de bits de la séquence binaire, chaque image (P) de la séquence d'images étant associée à exactement un bit de la séquence binaire.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel la séquence binaire comprend l'identifiant (14) complet.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel deux appareils de prise de vue (6) sont utilisés et/ou dans lequel le dispositif (10) effectue une acquisition tridimensionnelle.
  10. Procédé selon au moins la revendication 3, dans lequel le dispositif (10) comprend au moins 1000 sources lumineuses (1).
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel le dispositif (10) est prévu pour éclairer ou illuminer une partie de bâtiment et/ou pour être placé sur une partie de bâtiment.
  12. Procédé selon l'une quelconque des revendications précédentes, dans lequel une partie des sources lumineuses (1) ou la totalité des sources lumineuses (1) sont des diodes électroluminescentes.
  13. Programme informatique comprenant un code de programme au moyen duquel un procédé selon l'une quelconque des revendications précédentes est mis en oeuvre lorsque le programme informatique est exécuté sur un ordinateur.
  14. Unité de localisation (4) destinée à localiser des sources lumineuses d'un système d'éclairement (5), comprenant :
    - un calculateur (2),
    - une liaison de données (3) qui est conçue pour être connectée à dispositif (10) comportant une pluralité de sources lumineuses (1) du système d'éclairement (5) et pour commander individuellement les sources lumineuses (1), et
    - au moins un appareil de prise de vue numérique (6), l'unité de localisation (4) étant conçue pour mettre en oeuvre un procédé selon l'une quelconque des revendications 1 à 12.
EP11181673.2A 2010-09-28 2011-09-16 Procédé de localisation de sources lumineuses, programme informatique et unité de localisation Active EP2434842B1 (fr)

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DE102010046740A DE102010046740A1 (de) 2010-09-28 2010-09-28 Verfahren zur Lokalisierung von Lichtquellen, Computerprogramm und Lokalisierungseinheit

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US9282618B2 (en) 2016-03-08
US20120105204A1 (en) 2012-05-03
EP2434842A1 (fr) 2012-03-28
DE102010046740A1 (de) 2012-03-29

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