WO2014032856A1 - Dispositif de contrôle de la géométrie des trains roulants - Google Patents

Dispositif de contrôle de la géométrie des trains roulants 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
Authority
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)
English (en)
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/fr

Links

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 ,

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention concerne un dispositif de contrôle de la géométrie des trains roulants comportant au moins un dispositif d'éclairage (1) présentant au moins une source de lumière (2) et au moins un système micro-optique (3) conçu pour recevoir la lumière (5) émise par la au moins une source de lumière (2) et pour l'émettre en tant que cône de lumière (7).
PCT/EP2013/065340 2012-08-30 2013-07-19 Dispositif de contrôle de la géométrie des trains roulants WO2014032856A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012215408.6 2012-08-30
DE201210215408 DE102012215408A1 (de) 2012-08-30 2012-08-30 Vorrichtung zur Fahrzeugvermessung

Publications (1)

Publication Number Publication Date
WO2014032856A1 true WO2014032856A1 (fr) 2014-03-06

Family

ID=48875667

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/065340 WO2014032856A1 (fr) 2012-08-30 2013-07-19 Dispositif de contrôle de la géométrie des trains roulants

Country Status (2)

Country Link
DE (1) DE102012215408A1 (fr)
WO (1) WO2014032856A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
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
DE102005007244A1 (de) * 2005-02-17 2006-08-24 Krackhardt, Ulrich, Dr. Formerfassung von reflektierenden Oberflächen in Echtzeit
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 (fr) * 2010-07-16 2012-01-19 Koninklijke Philips Electronics N.V. Projecteur de lumière et système de vision pour déterminer des distances

Patent Citations (5)

* Cited by examiner, † Cited by third party
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 (de) * 2005-02-17 2006-08-24 Krackhardt, Ulrich, Dr. Formerfassung von reflektierenden Oberflächen in Echtzeit
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 (fr) * 2010-07-16 2012-01-19 Koninklijke Philips Electronics N.V. Projecteur de lumière et système de vision pour déterminer des distances

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Publication number Publication date
DE102012215408A1 (de) 2014-03-06

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