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DE-102024133053-A1 - Method for analyzing and/or adjusting adaptive headlights of a vehicle in a test stand, as well as test stand for carrying out the method

DE102024133053A1DE 102024133053 A1DE102024133053 A1DE 102024133053A1DE-102024133053-A1

Abstract

The invention relates to a method for analyzing and/or adjusting adaptive headlights (132) of a vehicle (130) in a test stand (100), wherein at least one driving operation of the vehicle (130) is fully or partially simulated, in which at least vehicle sensors relevant to the adaptive headlights (132) and/or one or more control units (138) are stimulated or simulated according to a driving situation during driving operation, wherein at least one of the adaptive headlights (132) emits headlight light during the simulated driving operation, and wherein a light distribution of the headlight light of this headlight (132) is recorded by a light measuring device (150) during the simulated driving operation, in particular continuously recorded during the simulated driving operation. The invention further relates to a test stand (100) on which the method is used.

Inventors

  • CHRISTIAN PETZINGER
  • Michel Lecomte
  • Kai Künne

Assignees

  • Dürr Assembly Products GmbH

Dates

Publication Date
20260513
Application Date
20241112

Claims (17)

  1. Method for analyzing and/or adjusting adaptive headlights (132) of a vehicle (130) in a test rig (100), in which at least one driving operation of the vehicle (130) is fully or partially simulated, in which at least vehicle sensors relevant to the adaptive headlights (132) and/or one or more control units (138) are stimulated or simulated according to a driving situation during driving operation, in which at least one of the adaptive headlights (132) emits headlight light during the simulated driving operation, and in which a light distribution of the headlight light of this headlight (132) is recorded by a light measuring device (150) during the simulated driving operation, in particular continuously recorded during the simulated driving operation.
  2. Procedure according to Claim 1 , wherein the light distribution of the headlight light is displayed on a projection surface (156) of the light measuring device (150) and is detected with a sensor device (158) of the light measuring device (150) and the detected light distribution is evaluated.
  3. Procedure according to Claim 1 , wherein in the light distribution on the projection surface (156) at least one of the position, size, luminous intensity, colour, sharpness of areas of the spotlight light, in particular of areas of the spotlight light that are not actively illuminated and/or switched off, of the emitting spotlight (132) are determined and measured.
  4. Method according to one of the preceding claims, wherein a comparison is made between the analyzed headlight light and the vehicle sensors stimulated or simulated according to a driving situation during driving operation.
  5. Method according to one of the preceding claims, wherein theoretical target measured values of the light distribution of the headlight light are compared with actual measured values of the light distribution of the headlight light recorded in the light measuring device (150).
  6. Procedure according to Claim 5 , wherein the analyzed actual measured values of at least one headlight (132) emitting position, size, luminous intensity, colour, sharpness of areas of the headlight that are not actively illuminated and/or switched off are provided for further processing of the stimulation or simulation, in particular wherein an actual headlight illumination is provided on a display unit with route representation.
  7. Procedure according to one of the Claims 4 until 6 , whereby a metrological evaluation of the adjustment is carried out automatically by machine or based on machine-defined tolerances.
  8. Method according to one of the preceding claims, wherein for adaptive headlights (132) relevant vehicle sensors are stimulated in accordance with a driving situation during driving operation when the vehicle (130) is at a predetermined position in the test stand (100).
  9. Method according to one of the preceding claims, wherein for adaptive headlights (132) relevant vehicle sensors are simulated according to a driving situation in driving operation as well as the vehicle (130) when a separate adaptive headlight (132) is located at a predetermined position in the test stand (100).
  10. Test stand (100) with a longitudinal direction (X), a transverse direction (Y) and a vertical direction (Z), for analyzing and/or adjusting adaptive headlights (132) of a vehicle (130), comprising: one or more transmitting and/or receiving devices (170) for stimulating and/or simulating vehicle sensors relevant to the headlights (132) according to a simulated driving situation during operation, at least one light measuring device (150) configured to detect a light distribution of the headlight beam of this headlight (132) during operation, in particular to detect continuously during the simulated driving operation.
  11. Test stand after Claim 10 , wherein the light measuring device (150) has a projection surface (156) on which the light distribution of the headlight light can be displayed, and a sensor device (158) with which the light distribution of the headlight light can at least be detected.
  12. Test stand after Claim 10 or 11 , wherein at least one radar transmitter is available as a transmitting device (170) for the simulation of driving operation.
  13. Test stand according to one of the Claims 10 until 12 , wherein the light measuring device (150) comprises a light collecting lens (154), in particular an aspherical positive lens.
  14. Test stand according to one of the Claims 10 until 13 , wherein the headlight (132) is positioned in the range of +/-50 mm in the transverse direction (Y) and the vertical direction (Z) in front of a lens center (155) of the light collecting lens (154).
  15. Test stand according to one of the Claims 10 until 14 , wherein the clear distance (136) between the headlight (132) and the light collecting lens (154) in the longitudinal direction (X) is at most 1200 mm.
  16. Test stand according to one of the Claims 10 until 15 , wherein a display unit (110), in particular a monitor, is provided for displaying the driving conditions of the vehicle (130), in particular of preceding and/or oncoming road users, and is directly or indirectly connected to the light measuring device (150).
  17. Test stand according to one of the Claims 10 until 16 , trained as a roller test bench and/or chassis geometry test bench (1000).

Description

State of the art The invention relates to a method for analyzing and/or adjusting adaptive headlights of a vehicle in a test stand and to a test stand for carrying out the method. From the DE 102018121144 B3 A system for adjusting the headlights of motor vehicles is known. It typically uses an adjustable, flat, light-colored surface with a central mark and a horizontal dividing line. The test surface is positioned perpendicular to the vehicle's standing surface and to the vehicle's longitudinal center plane. The distance between the test surface and the headlight to be adjusted is 10 m to achieve the correct headlight settings specified in standard testing procedures. The central mark of the test surface lies in the plane parallel to the vehicle's longitudinal center plane, passing through the center of the headlight being adjusted. For each headlight to be adjusted, the dividing line is set to a predetermined height, parallel to the vehicle's standing surface. The light intensity distribution of each headlight is adjusted, depending on the headlight type, to meet specific requirements with respect to the center mark and the dividing line. For headlights with symmetrical low beam and fog lights, the highest point of the cut-off line must touch the dividing line and run as horizontally as possible across the minimum width of the test area. Laterally, these headlights must be adjusted so that the light distribution is as symmetrical as possible to a vertical line through the center mark. For headlights with asymmetrical low beam, the cut-off line must touch the dividing line to the left of the center. The intersection point between the left, ideally horizontal, and the right, rising part of the cut-off line, i.e., the so-called inflection point, must lie on the vertical line through the central mark. The center of the high beam, however, must lie on the central mark. In the DE 102018121144 B3 The vehicle is aligned with a test surface positioned at a distance in front of it. A target position marker is projected onto the test surface using a laser scanner, and the position of this marker is adjusted by controlling the laser scanner based on the position of the headlight being adjusted relative to the test surface. A light distribution is then projected onto the test surface using the headlight being adjusted, and any deviations of this distribution from the target position marker are determined. Disclosure of the invention The object of the invention is to create a method for analyzing and/or adjusting adaptive headlights that can be carried out with few components in a compact design. Another task is to create a compact test setup for carrying out such a procedure. The problems are solved by the features of the independent claims. Favorable embodiments and advantages of the invention become apparent from the further claims, the description, and the drawings. A method for analyzing and/or adjusting adaptive headlights of a vehicle in a test rig is proposed, wherein at least one driving mode of the vehicle is fully or partially simulated, in which at least vehicle sensors relevant to the adaptive headlights are stimulated according to a driving situation or vehicle sensors relevant to the adaptive headlights are simulated. At least one of the adaptive headlights emits headlight beams during the simulated driving mode. During simulated driving, a light meter records the light distribution of the headlight beam. In particular, the light distribution can be continuously recorded during the simulated driving operation. Adaptive headlights adjust the illumination of the road surface depending on the vehicle's driving condition and the presence of other road users. The illumination of these headlights is controlled by various driver assistance systems (e.g., cameras, radar, etc.) and adapted to the respective driving and traffic conditions. For this purpose, the vehicle includes a camera system to detect and assess its surroundings. The procedure enables semi-automatic or fully automatic, highly precise and reliable testing and adjustment of adaptive headlights, especially main headlights. Fog lights and high beam headlights. Advantageously, in conjunction with a chassis geometry test bench, the headlights can be adjusted taking the chassis geometry data into account. The measurement technology used in the process is sensor-based, particularly camera-based, and ensures reproducible results in the analysis and adjustment of the headlights. The testing system can be automated and visualized using software. The headlight beam can include visible light, but also light from other light sources, such as infrared light. For example, infrared signals emitted by the headlight can be used for infrared sensors on the vehicle. Optionally, the adaptive headlights can be adjusted fully automatically using a robot. For example, a heavy-duty gantry allows the robot to be mounted directly above the light meter and positioned togethe