WO2014032856A1 - Vehicle measurement device - Google Patents

Vehicle measurement device Download PDF

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Publication number
WO2014032856A1
WO2014032856A1 PCT/EP2013/065340 EP2013065340W WO2014032856A1 WO 2014032856 A1 WO2014032856 A1 WO 2014032856A1 EP 2013065340 W EP2013065340 W EP 2013065340W WO 2014032856 A1 WO2014032856 A1 WO 2014032856A1
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WO
WIPO (PCT)
Prior art keywords
light source
optical system
micro
vehicle
light
Prior art date
Application number
PCT/EP2013/065340
Other languages
German (de)
French (fr)
Inventor
Wolfgang Seifert
Oleg SCHILLER
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2014032856A1 publication Critical patent/WO2014032856A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures

Definitions

  • the invention relates to a device for optical vehicle measurement and in particular to a device for vehicle measurement with an active lighting device.
  • Optical vehicle surveying devices comprise one or more image pickup devices that are spatially separated from each other.
  • the image recording devices detect the optical imaging of measuring marks which are attached to the vehicle to be measured.
  • Partly passive marks are used, i. the cameras capture a reflected image of the marks. Passive brands can be produced precisely.
  • the use of active, self-luminous marks is advantageous due to the lighting conditions at the measuring station, since they can be optically recognized and recorded optically even in poor lighting conditions by the image recording devices.
  • An inventive device for vehicle measurement has at least one active lighting device having at least one light source.
  • the illumination device furthermore has at least one micro-optical system which receives light emitted by the at least one light source during operation and radiates in the form of a defined beam cone.
  • the micro-optical system is set up so that the
  • the invention also relates to a method of vehicle surveying, the method including at least a portion of the object to be measured
  • the illumination device has at least one light source and at least one micro-optical system, which of the at least one light source
  • micro-optical system light emitted by a light source e.g. an LED
  • a light source e.g. an LED
  • the emission behavior of the illumination device comes as close as possible to the emission behavior of a defined point emitter, so that the light exit point is almost the same under all defined viewing angles. This allows precise measurements at all offset angles.
  • the micro-optical system has a low transmission loss and causes a high light output. This allows short exposure times of the sensor and is particularly advantageous for larger distances between the light source and the sensor.
  • a lighting device In a lighting device according to the invention, no virtual source migration of the spotlight occurs, the light exit point is rather fixed, even if the light exit point of the light source itself, for example. due to thermal influences drifts. Manufacturing tolerances of the light source, e.g. Fluctuations in the position of the semiconductor chip in an LED, can be compensated by the optical system, so that even commercially available LEDs as optical
  • Precision light source can be used in vehicle surveying.
  • the defined radiation angle can be adjusted as needed to
  • the micro-optical system is designed to output the light emitted by the at least one light source in the form of a homogeneous beam cone having a sharp boundary (light-dark boundary).
  • a homogeneous beam cone with a sharp boundary is particularly suitable for vehicle surveying.
  • the micro-optical system comprises at least one collimator and at least one diffuser. A combination of collimator and diffuser is particularly well suited for creating a beam cone suitable for vehicle surveying.
  • the diffuser is designed as a microlens array.
  • a microlens array provides a diffuser with good optical properties.
  • the collimator has only a single lens.
  • a collimator having only a single lens is particularly easy and inexpensive to produce.
  • the at least one light source is a light emitting diode.
  • a light emitting diode provided a well-suited, inexpensive and reliable light source with a long service life.
  • the lighting device has a plurality of diffusers. By using a plurality of diffusers, the quality of the light beam output by the lighting device can be further optimized.
  • the micro-optical system outputs a beam cone in a 30 ° x 6 ° space segment.
  • a beam cone is particularly well suited for vehicle surveying.
  • the device has at least one transducer in which a lighting device according to the invention is integrated.
  • a lighting device according to the invention is integrated.
  • An integrated into a transducer lighting device allows a particularly convenient and reliable vehicle measurement.
  • FIG. 1 is a first schematic sectional view of an embodiment of a lighting device according to the invention
  • FIG. 2 shows a schematic perspective view of an embodiment of a lighting device according to the invention
  • FIG. 3 shows a section through a specific structure of an embodiment of a lighting device according to the invention
  • FIG. 4 is a schematic plan view of a measuring station for vehicle measurement with a lighting device according to the invention.
  • FIG. 5 schematically shows a side view of a measuring station with a lighting device according to the invention with a vehicle arranged on the measuring station.
  • the lighting device 1 shows a schematic sectional view of an exemplary embodiment of a lighting device 1 according to the invention.
  • the lighting device 1 has a light source 2 which, for example, is designed as a light-emitting diode and emits light 5 during operation.
  • the light 5 emitted by the light source 2 is at least partially picked up by a micro-optical system 3 having a collimator 4 and a diffuser 6 and output in the form of a defined beam cone 7.
  • the beam cone 7 has, for example, a width of +/- 15 ° in the x-direction and a height of +/- 3 ° in the y-direction about a predetermined beam axis A.
  • On this Way illuminates the beam cone 7 at a predetermined distance d from the lighting device 1, a predetermined area 9 with a sharp cut-off.
  • Such, sharply limited beam cone 7 is particularly well suited for vehicle surveying.
  • FIG 3 shows a sectional view of a concrete construction of an exemplary embodiment of a lighting device 1 according to the invention.
  • the lighting device 1 has a rear wall 12 at which the
  • Light source 2 in this case a semiconductor light emitting diode (LED), is mounted.
  • LED semiconductor light emitting diode
  • the light source 2 is powered during operation via electrical leads 8 with power.
  • Housing element 10 is arranged, which completely surrounds the light source 2 and thus protects against damage and / or contamination.
  • an optical system 3 is formed which comprises a collimator 4 and a diffuser 6. As already shown in the schematic representation of FIG. 1, the optical system 3 picks up light 5 emitted by the light source 2 and outputs it in the form of a homogeneous beam cone 7 with a defined, sharp cut-off line. Such a homogenized beam cone 7 is for the
  • the collimator 4 is designed in the form of a single converging lens 4.
  • the diffuser 6 is formed as a matrix of a plurality of microlenses.
  • a collimator 4, which consists of only a single lens, is particularly inexpensive to produce and is sufficient for the requirements in the vehicle measurement usually.
  • the collimator 4 may also comprise a combination of multiple lenses to enhance the optical properties.
  • the measuring station has two mutually parallel rails 14, which may be, for example, the rails 14 of a lift.
  • the rails 14 can also be installed firmly on the ground of the measuring station.
  • each of the two is a member of the two in an area shown on the left in FIG. 4, each of the two is a member of the two in an area shown on the left in FIG. 4, each of the two is a member of the two in an area shown on the left in FIG. 4, each of the two is a member of the two in an area shown on the left in FIG. 4, each of the two is a member of the two in an area shown on the left in FIG. 4, each of the two is
  • Moving rails 14 equipped with a rotary plate 16 which makes it possible to deflect the steerable wheels of a vehicle 14 arranged on the rails 14 when the vehicle is arranged on the rails 14, that its steerable wheels are supported on the rotary plates 16.
  • the running rails 14 each have a sliding plate 18.
  • the sliding plates 18 are displaceable parallel to the longitudinal extent of the rails 14 and can thus be arranged at a variable distance from the associated rotary plate 16. In this way, the measuring station can be adapted to different vehicles having different distances between the front wheels and the rear wheels.
  • transducers 20 are arranged in a rectangular arrangement.
  • Two (front) transducers 20 are arranged at the height of the rotary plates 16 and thus adjacent to the usually steerable front wheels of a parked on the rails 14 vehicle.
  • Two (rear) transducers 20 are mechanically connected to the sliding plates 18, so that their position to the center distance of
  • measuring vehicle can be adjusted so that the rear transducers 20 are always positioned so that they face the rear wheels of the parked on the rails 14 vehicle.
  • Each of the transducers 20 has an image sensor 22 for the detection of measured values, which may be e.g. is designed as a (stereo) camera.
  • Each of the transducers 20 also has two position sensors 24, which are designed to determine the position of the respective transducers 20 with respect to at least two other of the transducers 20.
  • each transducer 20 has lighting devices 1 according to the invention at least on those of its side walls, which in each case face one of the other transducers 20.
  • the lighting devices 1 radiate, as shown schematically in Fig. 2 by the hatched areas shown in operation a defined
  • Beam cone 7 which is detected in each case by at least one position sensor 24 of an opposite transducer 20. In this way, it is possible to determine the relative position of the transducers 20 with respect to each other with high accuracy.
  • the beam cones 7 of two illumination devices 1 of the transducers 20 are shown in FIG. 4.
  • the beam cones 7 have in the plane of the measuring station (drawing plane of FIG. 4) preferably a beam width of 30 ° (+/- 15 ° about their respective central axis A, see FIG. 2).
  • FIG. 5 shows schematically the view of a measuring station according to the invention from the rear or front with a vehicle 26 which is supported with its wheels 28 on the running rails 14.
  • FIG. 5 The beam cone 7 has in the drawing plane of Fig. 5, which is aligned perpendicular to the plane of the measuring station, for example, a beam expansion of 6 ° (+/- 3 ° about the central axis A of the beam cone 7), and is from the position sensor 24 of the detected on the right side transducer 20 to the relative
  • FIGS. 4 and 5 each show beam cones 7a, as produced by illumination devices 1, which do not have a microoptical system 3 according to the invention. It can be clearly seen that the beam cones 7a, as would be emitted by conventional illumination devices 1, have a considerably wider beam expansion than the beam cones 7 emitted by the illumination devices 1 according to the invention and are therefore less suitable for determining the relative position between the transducers 20 ,

Abstract

A vehicle measurement device comprises at least one illumination unit (1) that includes at least one light source (2) and at least one micro-optical system (3) which is designed to absorb light (5) emitted by the at least one light source (2) and output said absorbed light as a defined beam cone (7).

Description

Titel  title
Vorrichtung zur Fahrzeugvermessung Device for vehicle measurement
Die Erfindung betrifft eine Vorrichtung zur optischen Fahrzeugvermessung und insbesondere eine Vorrichtung zur Fahrzeugvermessung mit einer aktiven Beleuchtungsvorrichtung. The invention relates to a device for optical vehicle measurement and in particular to a device for vehicle measurement with an active lighting device.
Stand der Technik State of the art
Vorrichtungen zur optischen Fahrzeugvermessung weisen eine oder mehrere Bildaufnahmevorrichtungen auf, die räumlich getrennt voneinander positioniert sind. Die Bildaufnahmevorrichtungen erfassen die optische Abbildung von Messmarken, die an dem zu vermessenden Fahrzeug angebracht sind. Zum Teil werden dabei passive Marken verwendet, d.h. die Kameras erfassen ein reflektiertes Abbild der Marken. Passive Marken lassen sich präzise herstellen. Optical vehicle surveying devices comprise one or more image pickup devices that are spatially separated from each other. The image recording devices detect the optical imaging of measuring marks which are attached to the vehicle to be measured. Partly passive marks are used, i. the cameras capture a reflected image of the marks. Passive brands can be produced precisely.
Häufig ist aufgrund der Lichtverhältnisse am Messplatz die Verwendung aktiver, selbst leuchtender Marken vorteilhaft, da diese auch bei schlechten Lichtverhältnissen von den Bildaufnahmevorrichtungen optisch gut erkannt und erfasst werden können. Frequently, the use of active, self-luminous marks is advantageous due to the lighting conditions at the measuring station, since they can be optically recognized and recorded optically even in poor lighting conditions by the image recording devices.
Offenbarung der Erfindung Disclosure of the invention
Es ist eine Aufgabe der Erfindung, eine Vorrichtung zur Fahrzeugvermessung mit wenigstens einer aktiven Beleuchtungsvorrichtung bereitzustellen, die so eingerichtet ist, dass die Fahrzeugvermessung mit hoher Genauigkeit durchgeführt werden kann. It is an object of the invention to provide a device for vehicle measurement with at least one active lighting device, which is set up so that the vehicle measurement can be carried out with high accuracy.
Eine erfindungsgemäße Vorrichtung zur Fahrzeugvermessung hat wenigstens eine aktive Beleuchtungsvorrichtung, die wenigstens eine Lichtquelle aufweist. Die Beleuchtungsvorrichtung weist darüber hinaus wenigstens ein mikrooptisches System auf, das von der wenigstens einen Lichtquelle im Betrieb abgegebenes Licht aufnimmt und in Form eines definierten Strahlkegels abstrahlt. Das mikrooptische System ist dabei so eingerichtet, dass die An inventive device for vehicle measurement has at least one active lighting device having at least one light source. The illumination device furthermore has at least one micro-optical system which receives light emitted by the at least one light source during operation and radiates in the form of a defined beam cone. The micro-optical system is set up so that the
Abstrahlung der Beleuchtungsvorrichtung der Abstrahlcharakteristik eines idealen Punktstrahlers möglichst nahe kommt. Die Erfindung betrifft auch ein Verfahren zur Fahrzeugvermessung, wobei das Verfahren einschließt, wenigstens einen Bereich des zu vermessenden Radiation of the illumination device of the radiation characteristic of an ideal spotlight comes as close as possible. The invention also relates to a method of vehicle surveying, the method including at least a portion of the object to be measured
Fahrzeugs mit einer Beleuchtungseinrichtung zu beleuchten. Dabei weist die Beleuchtungsvorrichtung wenigstens eine Lichtquelle und wenigstens ein mikrooptisches System auf, das von der wenigstens einen Lichtquelle Vehicle to illuminate with a lighting device. In this case, the illumination device has at least one light source and at least one micro-optical system, which of the at least one light source
ausgegebenes Licht in Form eines definierten Strahlkegels ausgibt. outputted light in the form of a defined beam cone.
In einer erfindungsgemäßen Beleuchtungsvorrichtung sammelt das In a lighting device according to the invention collects the
mikrooptische System Licht, das von einer Lichtquelle, z.B. einer LED, abgegeben wird und erzeugt eine definierte homogene Abstrahlung. In einer Ausführungsform kommt das Abstrahlverhalten der Beleuchtungsvorrichtung dem Abstrahlverhalten eines definierten Punktstrahler möglichst nahe, so dass der Lichtaustrittspunkt unter allen definierten Betrachtungswinkeln nahezu gleich ist. Dies ermöglicht präzise Messungen unter allen Versatzwinkeln. micro-optical system light emitted by a light source, e.g. an LED, is emitted and generates a defined homogeneous radiation. In one embodiment, the emission behavior of the illumination device comes as close as possible to the emission behavior of a defined point emitter, so that the light exit point is almost the same under all defined viewing angles. This allows precise measurements at all offset angles.
Im Ergebnis hat das mikrooptische System eine geringe Transmissionsdämpfung und bewirkt eine hohe Lichtausbeute. Dies ermöglicht kurze Belichtungszeiten des Sensors und ist insbesondere bei größeren Entfernungen zwischen der Lichtquelle und dem Sensor vorteilhaft. As a result, the micro-optical system has a low transmission loss and causes a high light output. This allows short exposure times of the sensor and is particularly advantageous for larger distances between the light source and the sensor.
Bei einer erfindungsgemäßen Beleuchtungsvorrichtung tritt keine virtuelle Quellwanderung des Punktstrahlers auf, der Lichtaustrittpunkt ist vielmehr fix, auch wenn der Lichtaustrittpunkt der Lichtquelle selbst z.B. aufgrund thermischer Einflüsse driftet. Fertigungstoleranzen der Lichtquelle, wie z.B. Schwankungen der Position des Halbleiterchips in einer LED, können durch das optische System ausgeglichen werden, so dass auch handelsübliche LEDs als optische In a lighting device according to the invention, no virtual source migration of the spotlight occurs, the light exit point is rather fixed, even if the light exit point of the light source itself, for example. due to thermal influences drifts. Manufacturing tolerances of the light source, e.g. Fluctuations in the position of the semiconductor chip in an LED, can be compensated by the optical system, so that even commercially available LEDs as optical
Präzisionslichtquelle in der Fahrzeugvermessung eingesetzt werden können. Precision light source can be used in vehicle surveying.
Der definierte Abstrahlwinkel kann bedarfsgemäß eingestellt werden, um The defined radiation angle can be adjusted as needed to
Nebenreflexionen und/oder Blendungen zu reduzieren. To reduce side reflections and / or glare.
In einer Ausführungsform ist das mikrooptische System ausgebildet, das von der wenigstens einen Lichtquelle abgegebene Licht in Form eines homogenen Strahlkegels mit scharfer Begrenzung (Hell-Dunkel-Grenze) auszugeben. Ein homogener Strahlkegel mit einer scharfen Begrenzung ist besonders gut zur Fahrzeugvermessung geeignet. In einer Ausführungsform weist das mikrooptische System wenigstens einen Kollimator und wenigstes einen Diffusor auf. Eine Kombination aus Kollimator und Diffusor ist besonders gut geeignet, um einen zur Fahrzeugvermessung geeigneten Strahlkegel zu erzeugen. In one embodiment, the micro-optical system is designed to output the light emitted by the at least one light source in the form of a homogeneous beam cone having a sharp boundary (light-dark boundary). A homogeneous beam cone with a sharp boundary is particularly suitable for vehicle surveying. In one embodiment, the micro-optical system comprises at least one collimator and at least one diffuser. A combination of collimator and diffuser is particularly well suited for creating a beam cone suitable for vehicle surveying.
In einer Ausführungsform ist der Diffusor als Mikrolinsenarray ausgebildet. Ein Mikrolinsenarray stellt einen Diffusor mit guten optischen Eigenschaften zur Verfügung. In one embodiment, the diffuser is designed as a microlens array. A microlens array provides a diffuser with good optical properties.
In einer Ausführungsform weist der Kollimator nur eine einzige Linse auf. Ein Kollimator, der nur eine einzige Linse aufweist, ist besonders einfach und kostengünstig herstellbar. In one embodiment, the collimator has only a single lens. A collimator having only a single lens is particularly easy and inexpensive to produce.
In einer Ausführungsform ist die wenigstens eine Lichtquelle eine Leuchtdiode. Eine Leuchtdiode stellte eine gut geeignete, kostengünstige und zuverlässige Lichtquelle mit einer hohen Lebensdauer zur Verfügung. In one embodiment, the at least one light source is a light emitting diode. A light emitting diode provided a well-suited, inexpensive and reliable light source with a long service life.
In einer Ausführungsform weist die Beleuchtungsvorrichtung mehrere Diffusoren auf. Durch die Verwendung mehrerer Diffusoren kann die Qualität des von der Beleuchtungsvorrichtung ausgegebenen Lichtstrahles weiter optimiert werden. In one embodiment, the lighting device has a plurality of diffusers. By using a plurality of diffusers, the quality of the light beam output by the lighting device can be further optimized.
In einer Ausführungsform gibt das mikrooptische System einen Strahlkegel in einem Raumsegment von 30° x 6° aus. Ein derartiger Strahlkegel ist für die Fahrzeugvermessung besonders gut geeignet. In one embodiment, the micro-optical system outputs a beam cone in a 30 ° x 6 ° space segment. Such a beam cone is particularly well suited for vehicle surveying.
In einer Ausführungsform weist die Vorrichtung wenigstens einen Messwertaufnehmer auf, in den eine erfindungsgemäße Beleuchtungsvorrichtung integriert ist. Eine in einen Messwertaufnehmer integrierte Beleuchtungsvorrichtung ermöglicht eine besonders bequeme und zuverlässige Fahrzeugvermessung. In one embodiment, the device has at least one transducer in which a lighting device according to the invention is integrated. An integrated into a transducer lighting device allows a particularly convenient and reliable vehicle measurement.
Kurze Beschreibung der Figuren Brief description of the figures
Die Erfindung wird im Folgenden anhand der beigefügten Figuren näher erläutert. Dabei zeigt: The invention will be explained in more detail below with reference to the attached figures. Showing:
Fig. 1 eine erste schematische Schnittansicht eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung, 1 is a first schematic sectional view of an embodiment of a lighting device according to the invention,
Fig. 2 eine schematische perspektivische Ansicht eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung, 2 shows a schematic perspective view of an embodiment of a lighting device according to the invention,
Fig. 3 einen Schnitt durch einen konkreten Aufbau eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung, 3 shows a section through a specific structure of an embodiment of a lighting device according to the invention,
Fig. 4 eine schematische Draufsicht auf einen Messplatz zur Fahrzeugvermessung mit einer erfindungsgemäßen Beleuchtungsvorrichtung, und 4 is a schematic plan view of a measuring station for vehicle measurement with a lighting device according to the invention, and
Fig. 5 schematisch eine seitliche Ansicht eines Messplatzes mit einer erfindungsgemäßen Beleuchtungsvorrichtung mit einem auf dem Messplatz angeordneten Fahrzeug. 5 schematically shows a side view of a measuring station with a lighting device according to the invention with a vehicle arranged on the measuring station.
Figurenbeschreibung figure description
Fig. 1 zeigt eine schematische Schnittansicht eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung 1. Die Beleuchtungsvorrichtung 1 weist eine Lichtquelle 2 auf, die beispielsweise als Leuchtdiode ausgebildet ist und im Betrieb Licht 5 abgibt. 1 shows a schematic sectional view of an exemplary embodiment of a lighting device 1 according to the invention. The lighting device 1 has a light source 2 which, for example, is designed as a light-emitting diode and emits light 5 during operation.
Das von der Lichtquelle 2 abgegebene Licht 5 wird zumindest teilweise von einem mikrooptischen System 3, das einen Kollimator 4 und einen Diffusor 6 aufweist, aufgenommen und in Form eines definierten Strahlkegels 7 ausgegeben. The light 5 emitted by the light source 2 is at least partially picked up by a micro-optical system 3 having a collimator 4 and a diffuser 6 and output in the form of a defined beam cone 7.
Fig. 2 zeigt eine schematische perspektivische Ansicht eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung 1 , die das von der Lichtquelle 2 abgegebene Licht in einem definierten Strahlkegel 7 ausgibt. Der Strahlkegel 7 hat beispielsweise eine Breite von +/- 15° in x-Richtung und eine Höhe von +/- 3° in y-Richtung um eine vorgegebene Strahlachse A. Auf diese Weise beleuchtet der Strahlkegel 7 in einem vorgegebenen Abstand d von der Beleuchtungsvorrichtung 1 eine vorgegebene Fläche 9 mit einer scharfen Hell- Dunkel-Begrenzung. Ein derartiger, scharf begrenzter Strahlkegel 7 ist besonders gut zur Fahrzeugvermessung geeignet. 2 shows a schematic perspective view of an exemplary embodiment of a lighting device 1 according to the invention, which outputs the light emitted by the light source 2 in a defined beam cone 7. The beam cone 7 has, for example, a width of +/- 15 ° in the x-direction and a height of +/- 3 ° in the y-direction about a predetermined beam axis A. On this Way illuminates the beam cone 7 at a predetermined distance d from the lighting device 1, a predetermined area 9 with a sharp cut-off. Such, sharply limited beam cone 7 is particularly well suited for vehicle surveying.
Fig. 3 zeigt eine Schnittansicht eines konkreten Aufbaus eines Ausführungsbeispiels einer erfindungsgemäßen Beleuchtungsvorrichtung 1. 3 shows a sectional view of a concrete construction of an exemplary embodiment of a lighting device 1 according to the invention.
Die Beleuchtungsvorrichtung 1 weist eine Rückwand 12 auf, an der die The lighting device 1 has a rear wall 12 at which the
Lichtquelle 2, in diesem Fall eine Halbleiter-Leuchtdiode (LED), angebracht ist.Light source 2, in this case a semiconductor light emitting diode (LED), is mounted.
Die Lichtquelle 2 wird im Betrieb über elektrische Zuleitungen 8 mit Strom versorgt. The light source 2 is powered during operation via electrical leads 8 with power.
In Abstrahlrichtung der Lichtquelle 2 vor der Rückwand 12 ist ein In the emission of the light source 2 in front of the rear wall 12 is a
Gehäuseelement 10 angeordnet, das die Lichtquelle 2 vollständig umschließt und so vor Beschädigungen und/oder Verschmutzungen schützt. Housing element 10 is arranged, which completely surrounds the light source 2 and thus protects against damage and / or contamination.
In der Stirnseite des Gehäuseelements 10, die der Lichtquelle 2 gegenüber liegt, ist ein optisches System 3 ausgebildet, das einen Kollimator 4 und einen Diffusor 6 umfasst. Wie bereits in der schematischen Darstellung der Fig. 1 gezeigt, nimmt das optische System 3 von der Lichtquelle 2 abgegebenes Licht 5 auf und gibt es in Form eines homogenen Strahlkegels 7 mit einer definierten, scharfen Hell-Dunkel-Grenze aus. Ein solcher homogenet Strahlkegel 7 ist für die In the front side of the housing element 10, which is opposite to the light source 2, an optical system 3 is formed which comprises a collimator 4 and a diffuser 6. As already shown in the schematic representation of FIG. 1, the optical system 3 picks up light 5 emitted by the light source 2 and outputs it in the form of a homogeneous beam cone 7 with a defined, sharp cut-off line. Such a homogenized beam cone 7 is for the
Fahrzeugvermessung besonders gut geeignet. Vehicle surveying particularly well suited.
In dem in der Fig. 3 gezeigten Ausführungsbeispiel ist der Kollimator 4 in Form einer einzigen Sammellinse 4 ausgebildet. Der Diffusor 6 ist als Matrix aus mehreren Mikrolinsen ausgebildet. Ein Kollimator 4, der nur aus einer einzigen Linse besteht, ist besonders kostengünstig herstellbar und ist für die Anforderungen in der Fahrzeugvermessung in der Regel ausreichend. Alternativ kann der Kollimator 4 auch eine Kombination aus mehreren Linsen umfassen, um die optischen Eigenschaften zu verbessern. In the exemplary embodiment shown in FIG. 3, the collimator 4 is designed in the form of a single converging lens 4. The diffuser 6 is formed as a matrix of a plurality of microlenses. A collimator 4, which consists of only a single lens, is particularly inexpensive to produce and is sufficient for the requirements in the vehicle measurement usually. Alternatively, the collimator 4 may also comprise a combination of multiple lenses to enhance the optical properties.
Fig. 4 zeigt eine schematische Draufsicht auf einen Messplatz zur Fahrzeugvermessung mit erfindungsgemäßen Beleuchtungsvorrichtungen 1 . Der Messplatz weist zwei parallel zueinander angeordnete Fahrschienen 14 auf, die beispielsweise die Fahrschienen 14 einer Hebebühne sein können. Die Fahrschienen 14 können aber auch fest am Boden des Messplatzes installiert sein. 4 shows a schematic plan view of a measuring station for vehicle measurement with lighting devices 1 according to the invention. The measuring station has two mutually parallel rails 14, which may be, for example, the rails 14 of a lift. The rails 14 can also be installed firmly on the ground of the measuring station.
In einem in der Figur 4 links dargestellten Bereich ist jede der beiden In an area shown on the left in FIG. 4, each of the two is
Fahrschienen 14 mit einer Drehplatte 16 ausgestattet, die es ermöglicht, die lenkbaren Räder eines auf den Fahrschienen 14 angeordneten Fahrzeugs einzulenken, wenn das Fahrzeug so auf den Fahrschienen 14 angeordnet ist, dass seine lenkbaren Räder auf den Drehplatten 16 abgestützt sind. Moving rails 14 equipped with a rotary plate 16, which makes it possible to deflect the steerable wheels of a vehicle 14 arranged on the rails 14 when the vehicle is arranged on the rails 14, that its steerable wheels are supported on the rotary plates 16.
In einem in der Fig. 4 auf der rechten Seite dargestellten Bereich weisen die Fahrschienen 14 jeweils eine Schiebeplatte 18 auf. Die Schiebeplatten 18 sind parallel zur Längserstreckung der Fahrschienen 14 verschiebbar und können so in einem variablen Abstand von der zugehörigen Drehplatte 16 angeordnet werden. Auf diese Weise kann der Messplatz an verschiedene Fahrzeuge, die unterschiedliche Abstände zwischen den Vorderrädern und den Hinterrädern haben, angepasst werden. In a region shown on the right side in FIG. 4, the running rails 14 each have a sliding plate 18. The sliding plates 18 are displaceable parallel to the longitudinal extent of the rails 14 and can thus be arranged at a variable distance from the associated rotary plate 16. In this way, the measuring station can be adapted to different vehicles having different distances between the front wheels and the rear wheels.
Um die Fahrschienen 14 sind in einer rechteckigen Anordnung vier Messwertaufnehmer 20 angeordnet. Zwei (vordere) Messwertaufnehmer 20 sind auf Höhe der Drehplatten 16 und damit neben den üblicherweise lenkbaren Vorderrädern eines auf den Fahrschienen 14 abgestellten Fahrzeugs angeordnet. Zwei (hintere) Messwertaufnehmer 20 sind mechanisch mit den Schiebeplatten 18 verbunden, so dass ihre Position derart an den Achsabstand des zu Around the rails 14 four transducers 20 are arranged in a rectangular arrangement. Two (front) transducers 20 are arranged at the height of the rotary plates 16 and thus adjacent to the usually steerable front wheels of a parked on the rails 14 vehicle. Two (rear) transducers 20 are mechanically connected to the sliding plates 18, so that their position to the center distance of
vermessenden Fahrzeugs angepasst werden kann, dass die hinteren Messwertaufnehmer 20 stets so positioniert sind, dass sie den Hinterrädern des auf den Fahrschienen 14 abgestellten Fahrzeugs gegenüber liegen. measuring vehicle can be adjusted so that the rear transducers 20 are always positioned so that they face the rear wheels of the parked on the rails 14 vehicle.
Jeder der Messwertaufnehmer 20 weist einen Bildsensor 22 zur Messwerterfassung auf, der z.B. als (Stereo-) Kamera ausgebildet ist. Each of the transducers 20 has an image sensor 22 for the detection of measured values, which may be e.g. is designed as a (stereo) camera.
Jeder der Messwertaufnehmer 20 weist darüber hinaus zwei Positionssensoren 24 auf, die dazu ausgebildet sind, die Position des jeweiligen Messwertaufnehmers 20 in Bezug auf wenigstens zwei andere der Messwertaufnehmer 20 zu bestimmen. Dazu weist jeder Messwertaufnehmer 20 wenigstens an denjenigen seiner Seitenwände, die jeweils einem der anderen Messwertaufnehmer 20 zugewandt sind, erfindungsgemäße Beleuchtungseinrichtungen 1 auf. Each of the transducers 20 also has two position sensors 24, which are designed to determine the position of the respective transducers 20 with respect to at least two other of the transducers 20. For this purpose, each transducer 20 has lighting devices 1 according to the invention at least on those of its side walls, which in each case face one of the other transducers 20.
Die Beleuchtungseinrichtungen 1 strahlen, wie in der Fig. 2 durch die schraffiert dargestellten Flächen schematisch gezeigt, im Betrieb einen definierten The lighting devices 1 radiate, as shown schematically in Fig. 2 by the hatched areas shown in operation a defined
Strahlkegel 7 aus, der jeweils von wenigstens einem Positionssensor 24 eines gegenüberliegenden Messwertaufnehmers 20 erfasst wird. Auf diese Weise ist es möglich, die relative Position der Messwertaufnehmer 20 in Bezug zueinander mit hoher Genauigkeit zu bestimmen. Beam cone 7, which is detected in each case by at least one position sensor 24 of an opposite transducer 20. In this way, it is possible to determine the relative position of the transducers 20 with respect to each other with high accuracy.
Aus Gründen der Übersichtlichkeit sind in der Fig. 4 nur die Strahlkegel 7 von zwei Beleuchtungseinrichtungen 1 eines der Messwertaufnehmer 20 gezeigt. Die Strahlkegel 7 weisen in der Ebene des Messplatzes (Zeichenebene der Fig. 4) vorzugsweise eine Strahlbreite von 30° (+/- 15° um ihre jeweilige Mittelachse A, siehe Fig. 2) auf. For reasons of clarity, only the beam cones 7 of two illumination devices 1 of the transducers 20 are shown in FIG. 4. The beam cones 7 have in the plane of the measuring station (drawing plane of FIG. 4) preferably a beam width of 30 ° (+/- 15 ° about their respective central axis A, see FIG. 2).
Fig. 5 zeigt schematisch die Ansicht eines erfindungsgemäßen Messplatzes von hinten oder vorne mit einem Fahrzeug 26, das mit seinen Rädern 28 auf den Fahrschienen 14 abgestützt ist. 5 shows schematically the view of a measuring station according to the invention from the rear or front with a vehicle 26 which is supported with its wheels 28 on the running rails 14.
Rechts und links von dem Fahrzeug 26 ist jeweils ein Messwertaufnehmer 20 angeordnet. Aus Gründen der Übersichtlichkeit ist in der Fig. 5 nur der von einer Beleuchtungseinrichtung 1 des linken Messwertaufnehmers 20 ausgegebene Strahlkegel 7 schraffiert dargestellt. Der Strahlkegel 7 weist in der Zeichenebene der Fig. 5, die senkrecht zur Ebene des Messplatzes ausgerichtet ist, beispielsweise eine Strahlaufweitung von 6° (+/- 3° um die Mittelachse A des Strahlkegels 7) auf, und wird von dem Positionssensor 24 des auf der rechten Seite angeordneten Messwertaufnehmers 20 detektiert, um die relative Right and left of the vehicle 26 each have a transducer 20 is arranged. For reasons of clarity, only the beam cone 7 output by an illumination device 1 of the left-hand measuring transducer 20 is shown hatched in FIG. The beam cone 7 has in the drawing plane of Fig. 5, which is aligned perpendicular to the plane of the measuring station, for example, a beam expansion of 6 ° (+/- 3 ° about the central axis A of the beam cone 7), and is from the position sensor 24 of the detected on the right side transducer 20 to the relative
Anordnung der beiden Messwertaufnehmern 20 zueinander zu bestimmen. Arrangement of the two transducers 20 to each other to determine.
Die gestrichelten Linien in den Figuren 4 und 5 zeigen zum Vergleich jeweils Strahlkegel 7a, wie sie von Beleuchtungsvorrichtungen 1 erzeugt werden, die kein erfindungsgemäßes mikrooptisches System 3 aufweisen. Es ist deutlich erkennbar, dass die Strahlkegel 7a, wie sie von herkömmlichen Beleuchtungsvorrichtungen 1 ausgegeben werden würden, eine erheblich weitere Strahlaufweitung als die von den erfindungsgemäßen Beleuchtungsvorrichtungen 1 ausgegebenen Strahlkegel 7 aufweisen und daher zur Bestimmung der relativen Position zwischen den Messwertaufnehmern 20 weniger gut geeignet sind. For comparison, the dashed lines in FIGS. 4 and 5 each show beam cones 7a, as produced by illumination devices 1, which do not have a microoptical system 3 according to the invention. It can be clearly seen that the beam cones 7a, as would be emitted by conventional illumination devices 1, have a considerably wider beam expansion than the beam cones 7 emitted by the illumination devices 1 according to the invention and are therefore less suitable for determining the relative position between the transducers 20 ,
Dies verdeutlicht, dass die Genauigkeit, mit der die Positionen der Messwertaufnehmer 20 in Bezug zueinander bestimmt werden können, durch die Verwendung erfindungsgemäßer Beleuchtungsvorrichtungen erheblich verbessert werden kann. This illustrates that the accuracy with which the positions of the transducers 20 relative to each other can be determined, can be significantly improved by the use of lighting devices according to the invention.

Claims

Patentansprüche claims
1. Vorrichtung zur Fahrzeugvermessung mit 1. Device for vehicle measurement with
wenigstens einer Beleuchtungsvorrichtung (1), die wenigstens eine Lichtquelle (2) aufweist,  at least one lighting device (1) having at least one light source (2),
dadurch gekennzeichnet, dass  characterized in that
die Beleuchtungsvorrichtung (1) wenigstens ein mikrooptisches System (3) aufweist, das ausgebildet ist, von der wenigstens einen Lichtquelle (2) abgegebenes Licht (5) aufzunehmen und in Form eines definierten Strahlkegels (7) auszugeben.  the lighting device (1) has at least one micro-optical system (3) which is designed to receive light emitted by the at least one light source (2) and to output it in the form of a defined beam cone (7).
2. Vorrichtung nach Anspruch 1 , wobei das mikrooptische System (3) ausgebildet ist, von der wenigstens einen Lichtquelle (2) abgegebenes Licht (5) in Form eines homogenen Strahlkegels (7) mit scharfer Begrenzung auszugeben. 2. Device according to claim 1, wherein the micro-optical system (3) is adapted to output from the at least one light source (2) emitted light (5) in the form of a homogeneous beam cone (7) with sharp boundary.
3. Vorrichtung nach Anspruch 1 oder 2, wobei das mikrooptische System (3) wenigstens einen Kollimator (4) und wenigstes einen Diffusor (6) aufweist. 3. Apparatus according to claim 1 or 2, wherein the micro-optical system (3) comprises at least one collimator (4) and at least one diffuser (6).
4. Vorrichtung nach Anspruch 3, wobei der Diffusor (6) als Mikrolinsenarray ausgebildet ist. 4. Apparatus according to claim 3, wherein the diffuser (6) is designed as a microlens array.
5. Vorrichtung nach Anspruch 3 oder 4, wobei der Kollimator (4) nur eine einzige Linse aufweist. 5. Apparatus according to claim 3 or 4, wherein the collimator (4) has only a single lens.
6. Vorrichtung nach einem der vorangehenden Ansprüche, wobei wenigstens eine Lichtquelle (2) eine Leuchtdiode ist. 6. Device according to one of the preceding claims, wherein at least one light source (2) is a light emitting diode.
7. Vorrichtung nach einem der vorangehenden Ansprüche, wobei die 7. Device according to one of the preceding claims, wherein the
Beleuchtungsvorrichtung (1) mehrere Diffusoren (6) aufweist. Lighting device (1) has a plurality of diffusers (6).
8. Vorrichtung nach einem der vorangehenden Ansprüche, wobei das mikrooptische System (3) einen Strahlkegel (7) in einem Raumsegment von 30° x 6° ausgibt. 8. Device according to one of the preceding claims, wherein the micro-optical system (3) outputs a beam cone (7) in a space segment of 30 ° x 6 °.
9. Vorrichtung nach einem der vorangehenden Ansprüche mit wenigstens Messwertaufnehmer (20), wobei die Beleuchtungsvorrichtung (1) in den 9. Device according to one of the preceding claims with at least transducer (20), wherein the lighting device (1) in the
Messwertaufnehmer (20) integriert ist. Transducer (20) is integrated.
10. Verfahren zur Fahrzeugvermessung, wobei das Verfahren einschließt, wenigstens einen Bereich des zu vermessenden Fahrzeugs mit einer 10. A method of vehicle surveying, the method including at least a portion of the vehicle to be measured with a
Beleuchtungsvorrichtung (1) zu beleuchten, Lighting fixture (1),
dadurch gekennzeichnet,  characterized,
dass die Beleuchtungsvorrichtung (1) wenigstens eine Lichtquelle (2) und wenigstens ein mikrooptisches System (3) aufweist, wobei das mikrooptische System (3) von der wenigstens einen Lichtquelle (2) abgegebenes Licht in Form eines definierten Strahlkegels (7) ausgibt.  in that the illumination device (1) has at least one light source (2) and at least one micro-optical system (3), wherein the micro-optical system (3) outputs light emitted by the at least one light source (2) in the form of a defined beam cone (7).
PCT/EP2013/065340 2012-08-30 2013-07-19 Vehicle measurement device WO2014032856A1 (en)

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DE102012215408.6 2012-08-30

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Citations (5)

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US6548797B1 (en) * 2000-10-20 2003-04-15 Nikon Corporation Apparatus and method for measuring a wavefront using a screen with apertures adjacent to a multi-lens array
DE102005007244A1 (en) * 2005-02-17 2006-08-24 Krackhardt, Ulrich, Dr. Absolute calibration free three dimensional mirror surface measurement sensor has lamp unit giving high depth of field laterally structured light pattern from microlens array
US20070109438A1 (en) * 2004-01-20 2007-05-17 Jacques Duparre Image recognition system and use thereof
US20100123873A1 (en) * 2008-11-14 2010-05-20 Amo Wavefront Sciences, Llc Method of qualifying light spots for optical measurements and measurement instrument employing method of qualifying light spots
WO2012007898A1 (en) * 2010-07-16 2012-01-19 Koninklijke Philips Electronics N.V. A light projector and vision system for distance determination

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Publication number Priority date Publication date Assignee Title
US6548797B1 (en) * 2000-10-20 2003-04-15 Nikon Corporation Apparatus and method for measuring a wavefront using a screen with apertures adjacent to a multi-lens array
US20070109438A1 (en) * 2004-01-20 2007-05-17 Jacques Duparre Image recognition system and use thereof
DE102005007244A1 (en) * 2005-02-17 2006-08-24 Krackhardt, Ulrich, Dr. Absolute calibration free three dimensional mirror surface measurement sensor has lamp unit giving high depth of field laterally structured light pattern from microlens array
US20100123873A1 (en) * 2008-11-14 2010-05-20 Amo Wavefront Sciences, Llc Method of qualifying light spots for optical measurements and measurement instrument employing method of qualifying light spots
WO2012007898A1 (en) * 2010-07-16 2012-01-19 Koninklijke Philips Electronics N.V. A light projector and vision system for distance determination

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