DE102021108293A1 - Arrangement for carrying out tests on a motor vehicle with multiple lanes and method for carrying out tests on a motor vehicle with multiple lanes using the arrangement - Google Patents

Abstract

The present invention relates to an arrangement for carrying out tests on a motor vehicle. An examination of the radiation characteristics of a headlight is to be carried out. For this purpose, the vehicle is positioned in a vehicle test stand (2), in which driving operation can be simulated for the vehicle, even under changing load conditions. The vehicle test stand (2) has wheel mounts (3, 4, 5, 6) consisting of double rollers (9, 10; 11, 12; 13, 14; 15, 16) between which a lifting device (201) is arranged. The contact surfaces (202) of the lifting devices (201) can be leveled relative to each other in the raised position so that they are in a horizontal plane. This means that the vehicle stands exactly in a horizontal plane for the headlight test. A method of conducting a headlamp test using this arrangement is also described. Furthermore, an arrangement is described in which a surface area (26) for testing the underbody area of the motor vehicle and two surface areas (29, 30) for positioning objects or sensor elements are arranged in a space-optimized manner in connection with a vehicle test stand (2) in order to be able to carry out tests, for example to be able to carry out a lane change assistant.

Description

According to claim 1, the present invention relates to an arrangement for carrying out tests on a multi-lane motor vehicle and, according to claim 6, to a method for carrying out tests on a multi-lane motor vehicle using the arrangement.

It is known to subject motor vehicles to a general inspection at regular intervals in order to check the road safety of the motor vehicles. In addition to visual inspections of the vehicle for damage, this main inspection also includes, among other things, the exhaust gas test, checking the brake function and testing the lighting of the vehicles. It is known to assign a sticker to the motor vehicle when these tests have been successfully completed.

Such a test lane for the main inspection of motor vehicles consists of an inspection pit or lifting platform, a single-axle brake tester and a level vehicle parking area where the headlight adjustment test and the exhaust gas test are carried out.

In connection with testing the lighting, it is known that the arrangement has a testing device for the headlights of the motor vehicle. The known and currently used testing device is a so-called light box, which consists of a lens and a screen in the focal length of the lens. Such a light box is an angle measuring device for light beams and is designed to measure the radiation characteristics of the headlights in relation to two measuring directions. One measuring direction relates to the height adjustment, i.e. the inclination of the headlight beam to the horizontal. The other measurement direction relates to the lateral adjustment, i.e. the lateral angle of the headlight beam to the symmetry axis of the vehicle. For this purpose, the known testing device has an intrinsic Cartesian X,Y,Z coordinate system. The X-axis is the optical axis of the lens and meets the screen at the so-called central point. The Z axis is the vertical. A test is possible if the test device is aligned in terms of its position and orientation relative to the axis of symmetry of the vehicle to be tested and its headlights. The axis of symmetry is defined here with the straight line through the center points of the motor vehicle. The axle center is determined using the projection of the coordinates of the wheel centers of the wheels of a motor vehicle axle into the horizontal plane.

The beam characteristics of the headlights are such that these headlights have a beam characteristic in the "dipped beam" operating position under normal operating conditions with right-hand traffic. This radiation characteristic is defined by the progression of the light-dark boundary, which runs in the Y-direction from negative Y-values up to a break point as a horizontal straight line and from the break point as a straight line that has a 15° incline with increasing Y-values having. This radiation characteristic of the low beam when driving on the right means that the area to the right of the break point illuminates the road more than the area to the left of the break point. With the inclination of the headlight beam of the low beam by values between -1% and -1.2%, the area in front of the motor vehicle should be optimally illuminated while largely avoiding dazzling other road users, especially oncoming traffic.

A headlight is optimally adjusted when the target course of the cut-off line with the break point in the middle (the value of the Y-coordinate of the coordinate system of the test facility has the value "0") with the actual course of the cut-off line of the headlight matches.

With the design of the well-known testing devices for headlights as a "light box", the setting of the basic directions of the headlights can be checked both in the vertical direction and in the horizontal direction by measuring the position of the inflection point on the screen of the light box.

In some vehicles, the emission characteristics of the lighting also depend on driving conditions. These driving conditions relate in particular to cornering. In this context, it is known to illuminate the area on the right in front of the motor vehicle more intensely at a steering angle that corresponds to a right-hand bend. Correspondingly, with a steering angle that corresponds to a left turn, the area on the left in front of the motor vehicle is illuminated more intensely. This adaptation of the area to be illuminated can also depend on the driving speed. The change in the illumination of the area to be illuminated in front of the motor vehicle can be implemented by switching on the fog light (in front) on the respective side of the vehicle under the appropriate conditions. It is also known, as an alternative or in addition to switching on a fog light, to adapt the radiation characteristics of the headlights of the motor vehicle according to the conditions of cornering.

It is also known to provide an automatic switch-on and switch-off device for the “high beam” operating state of the headlights of the motor vehicle. On the one hand, this switch-on and switch-off device evaluates whether the vehicle is inside or outside built-up areas. The high beam is not switched on automatically in built-up areas. In addition, the switch-on and switch-off device evaluates whether another vehicle is detected whose driver could be blinded by the main beam being switched on in the driver's vehicle. When such a vehicle is detected, the high beam is turned off by the on and off device

There are also devices for switching the high beam on and off in motor vehicles, which not only switch the high beam on and off in automatic mode, but also change the emission characteristics of the high beam under certain conditions. If, for example, a vehicle driving ahead is detected, the emission characteristics of the high beam are adjusted in such a way that the light cone of the high beam illuminates the area to the left and right of the vehicle driving ahead, with the solid angle in which the vehicle driving ahead is located not being illuminated by the high beam.

It is known that when testing the emission characteristics of a motor vehicle to date, it has been required that the motor vehicle stands on a surface where the individual points of the surface, at least in the areas where a wheel of a motor vehicle to be tested stands up, only lie in one plane with small tolerances. There is also the requirement that this plane is only inclined with small tolerances in relation to a horizontal plane.

The present invention is based on the object of simplifying the testing of the headlights of a motor vehicle.

This object is achieved by an arrangement with the features of claim 1.

The arrangement has a testing device for the radiation characteristics of the headlights of the motor vehicle. The testing device is designed to measure the radiation characteristics of the headlights in relation to an intrinsic coordinate system of the testing device.

Within the scope of the present invention, this testing device can be designed with the functionality of the known “light box”. With such a testing device, it is possible to test whether a headlight is set correctly within the framework of legally specified tolerances.

This testing device can also be designed with a range of functions that goes beyond this. The testing device can then be designed, for example, by dividing a measuring surface into individual surface elements. Such a test device can be used to check which surface elements in the measurement area are illuminated and which surface elements in the measurement area are not illuminated. The border between an unilluminated and an illuminated surface element is determined by a suitable definition of a threshold value of the light intensity. In addition to the functionality of the well-known "light box", such a testing device can be used to implement a more extensive range of functions during testing.

This extended range of functions can, for example, relate to the change in an emission characteristic of the headlight in the “dipped beam” function when the motor vehicle is cornering. The change in the emission characteristics can consist in adapting the emission characteristics of the headlight itself. Alternatively or additionally, the change in the radiation characteristics can also consist in the fog lights on the corresponding side of the vehicle being switched on when cornering (at least when driving forward).

This extended range of functions can also include, for example, the described adaptation of the beam characteristics of the headlight in the "high beam" function. This adaptation can relate to an embodiment in which it is taken into account whether an oncoming motor vehicle is approaching. This adaptation can also relate to an embodiment in which it is taken into account whether a motor vehicle is driving ahead.

These changes in the radiation characteristics of the headlamp, described as examples, cause a change in the state of the illuminated and unilluminated surface elements in the measuring surface of the test device. This allows the respective radiation characteristics to be evaluated.

The testing of the emission characteristics obviously depends on the motor vehicle to be tested, in particular on which changes in the emission characteristics of the headlights of the motor vehicle are implemented depending on certain driving and environmental conditions for the respective motor vehicle. This depends on the respective vehicle type as well as possibly of the special equipment implemented in the motor vehicle.

• ➢ Die Anzahl der Radaufnahmen des Fahrzeugprüfstandes entspricht der Anzahl der Räder eines zu prüfenden Kraftfahrzeuges.
• ➢ Die Radaufnahmen sind hinsichtlich der Abstände zueinander so eingestellt oder so einstellbar, dass jeweils ein Rad des zu prüfenden Kraftfahrzeugs auf einer Radaufnahme aufsteht.
• ➢ Die Radaufnahmen bestehen aus Doppelrollen.
• ➢ Zwischen den beiden Rollen jeder der Radaufnahmen ist in jeder Radaufnahme eine Hebeeinrichtung vorgesehen, die eine Aufstandsfläche für das Fahrzeugrad aufweist.
  • ➢ Die Hebeeinrichtungen weisen jeweils eine Aufstandsfläche für das Rad des zu prüfenden Kraftfahrzeugs auf, das auf der jeweiligen Radaufnahme aufsteht.
  • ➢ Die Hebeeinrichtungen weisen eine erste Betriebsposition auf, in der diese Hebeeinrichtungen so weit abgesenkt sind, dass das jeweilige Rad des zu prüfenden Kraftfahrzeugs auf den beiden Rollen der jeweiligen Radaufnahmen aufsteht.
  • ➢ Die Hebeeinrichtungen weisen eine zweite Betriebsposition auf, in der diese Hebeeinrichtungen so weit angehoben sind, dass das jeweilige Rad des zu prüfenden Kraftfahrzeugs auf der Aufstandsfläche der Hebeeinrichtung der jeweiligen Radaufnahmen aufsteht.
    • ➢ Die Aufstandsflächen der Hebeeinrichtungen der Radaufnahmen bilden in der zweiten Betriebsposition eine Ebene.

The arrangement also has a vehicle test stand. The vehicle test stand has wheel mounts. The following applies to these wheel mounts:

• ➢ The number of wheel mounts on the vehicle test bench corresponds to the number of wheels on a motor vehicle to be tested.
• ➢ The distances between the wheel mounts are set or adjustable in such a way that one wheel of the vehicle to be tested rests on a wheel mount.
• ➢ The wheel mounts consist of double rollers.
• ➢ Between the two rollers of each of the wheel mounts, a lifting device is provided in each wheel mount, which has a contact surface for the vehicle wheel.
  • ➢ The lifting devices each have a contact area for the wheel of the vehicle to be tested, which stands on the respective wheel mount.
  • ➢ The lifting devices have a first operating position in which these lifting devices are lowered far enough for the respective wheel of the motor vehicle to be checked to stand on the two rollers of the respective wheel mounts.
  • ➢ The lifting devices have a second operating position in which these lifting devices are raised so far that the respective wheel of the motor vehicle to be tested rests on the contact surface of the lifting device of the respective wheel mount.
    • ➢ The contact surfaces of the lifting devices of the wheel mounts form one level in the second operating position.

The use of such wheel mounts - especially in the configuration with double rollers - in vehicle test benches is known in order to be able to transmit torque to the wheels of the motor vehicle via drive or braking torques of the rollers of the wheel mounts. With these double rollers, the wheels of the motor vehicle sink between the two rollers of the respective wheel mount. In order to make it easier to move the motor vehicle out of the vehicle test stand after tests have been carried out, it is known to provide lifting devices, each with a contact surface, which are each located between the two rollers of a wheel mount.

In the operating state of the vehicle test stand, in which the motor vehicle is to be tested with regard to the transmission of drive or braking torques to the wheels of the motor vehicle, the contact surfaces of these lifting devices are lowered in their first operating position to such an extent that the wheels of the motor vehicle are respectively on the both rollers of the respective wheel mount stand up.

To make it easier to move the motor vehicle out of the vehicle test stand, the wheels of the motor vehicle are raised by extending the contact surfaces of the lifting devices so far that the wheels of the motor vehicle are no longer sunk between the rollers of the wheel mount. The motor vehicle can then simply drive out of the vehicle test bench. Otherwise, when moving out of the "sunken" position of the wheels, the motor vehicle would have to raise itself so far when driving off via the propulsion of the driven wheels that the wheels of the motor vehicle move out of the respective wheel mount.

Within the scope of the present invention, this raised position of the contact surfaces of the lifting devices is additionally defined as the second operating position of the lifting devices by the boundary condition that the contact surfaces of the lifting devices form a plane in this second operating position.

In the configuration according to the prior art, it was not important whether the contact surfaces of the lifting devices form a plane in the raised position. The function of supporting the exit of the motor vehicle from the vehicle test stand can be implemented if each of the wheels is raised, even if the contact surfaces of the wheels then do not necessarily form a plane.

The present invention makes use of the design of the vehicle dynamometer with the jacks, in that these jacks are not merely used to facilitate the extraction of the motor vehicle from the vehicle dynamometer. Within the scope of the present invention, the lifting devices have the second operating position, in which the contact surfaces of the lifting devices lie in one plane in the raised state. When the wheels of the motor vehicle stand up on the contact surfaces of these lifting devices in this second operating position of the lifting devices, the motor vehicle is in one plane with all of its wheels.

In this context, the definition of the “level” depends on the tolerances the specifications and requirements that are placed on the "evenness" of a measuring station as a standing surface for a motor vehicle when checking the headlight setting.

This plane can advantageously be adjusted in such a way that this plane runs horizontally.

• ➢ dass entweder das intrinsische Koordinatensystem der Prüfeinrichtung bei der Durchführung der Prüfungen ebenfalls entsprechend geneigt ist oder
• ➢ dass bei der Bewertung der Abstrahlcharakteristik der Scheinwerfer durch die Prüfeinrichtung eine unterschiedliche Neigung des intrinsischen Koordinatensystems der Prüfeinrichtung zu der Ebene der Aufstandsflächen der Hebevorrichtungen rechnerisch berücksichtigt wird.

In principle, it is also possible to set this plane with a defined inclination. Then it should be noted

• ➢ that either the intrinsic coordinate system of the test facility is also inclined accordingly when the tests are carried out, or
• ➢ that when evaluating the radiation characteristics of the headlamps by the test facility, a different inclination of the intrinsic coordinate system of the test facility to the level of the contact surfaces of the lifting devices is taken into account in the calculation.

The contact surfaces of the lifting devices can be positioned in one plane by preparing the on-site prerequisites during assembly in such a way that the wheel mounts of the vehicle test bench are already arranged in one plane with low tolerances.

This can in turn be achieved by the fact that the floor on which the wheel mounts of the vehicle test stand are arranged is already correspondingly level. Alternatively or additionally, this can be achieved by the wheel mounts each having adjustment elements in order to adjust their position in the vertical direction relative to the ground on which the wheel mounts stand. The position of the individual wheel mounts can be adjusted independently of the other wheel mounts. The wheel mounts can also be mounted on a common frame. It is then possible to provide this frame with adjustment elements in order to be able to adjust the alignment of the frame with respect to the ground. As an alternative or in addition to adjusting the frame, it is also possible here to provide adjusting elements for each individual wheel mount in order to then be able to adjust the wheel mounts relative to the frame.

In such a configuration, it is sufficient for the positioning of the contact surfaces of the lifting devices in their raised position in one plane if the contact surfaces of the lifting devices in the raised position are raised by a defined distance relative to the two rollers of the wheel mounts when an end stop is reached. This allows the contact surfaces of the lifting devices to be positioned on one level with little effort during operation. In this case, a control device can be provided which, in order to raise the contact surfaces of the lifting devices, moves them upwards until they have each reached the end stop.

• ➢ Eine solche Synchronisierung kann erfolgen, indem die Positionen der Aufstandsflächen der Hebeeinrichtungen in der Z-Richtung im Rahmen eines Funktionstests des Fahrzeugprüfstands gemessen werden. Die einzelnen Wegstrecken, um die die Aufstandsflächen der Hebeeinrichtungen angehoben werden müssen, damit diese sich in einer Ebene befinden, können im Rahmen des Funktionstests in einer Steuereinrichtung gespeichert werden. Bei dieser Ausgestaltung können die Aufstandsflächen der Hebeeinrichtungen nachfolgend im laufenden Betrieb jeweils um die gespeicherten einzelnen Wegstrecken angehoben werden.
• ➢ Alternativ zu dieser Ausgestaltung mit der Steuereinrichtung kann eine Regeleinrichtung vorhanden sein. Der Regeleinrichtung ist ein Messsystem zugeordnet, mit dem die Z-Koordinaten der Aufstandsflächen der Hebeeinrichtungen im Koordinatensystem des Fahrzeugprüfstandes gemessen werden. Mit einer solchen Regeleinrichtung können im laufenden Betrieb die Z-Koordinaten der Aufstandsflächen der Hebeeinrichtungen gemessen werden, so dass damit eine Abweichung der Z-Koordinaten der Aufstandsflächen der Hebeeinrichtungen gegenüber einer Ebene ausgeglichen werden kann, indem die Wegstrecken angepasst werden, um die die einzelnen Aufstandsflächen der Hebeeinrichtungen angehoben werden.

The positioning of the contact surfaces of the lifting devices in one plane can also be realized if the on-site conditions during assembly have lower requirements for the evenness of the assembly surface for the vehicle test bench. The positions of the wheel mounts of the vehicle test stand can then have larger tolerances compared to a plane. In this case, the positioning of the contact surfaces of the lifting devices must be synchronized in their second operating position.

• ➢ Such a synchronization can take place by measuring the positions of the contact surfaces of the lifting devices in the Z-direction as part of a function test on the vehicle test bench. The individual distances by which the contact surfaces of the lifting devices must be raised so that they are on one level can be stored in a control device as part of the function test. In this configuration, the contact surfaces of the lifting devices can subsequently be raised by the stored individual distances during operation.
• ➢ As an alternative to this configuration with the control device, a control device can be present. A measuring system is assigned to the control device, with which the Z coordinates of the contact surfaces of the lifting devices are measured in the coordinate system of the vehicle test stand. With such a control device, the Z coordinates of the contact areas of the lifting devices can be measured during operation, so that a deviation in the Z coordinates of the contact areas of the lifting devices relative to a plane can be compensated for by adjusting the distances by which the individual contact areas of the lifting devices.

In the arrangement, the test device and the vehicle test stand are assigned to one another at least in one measuring operating position such that the measurement of the radiation characteristics of the headlights of the motor vehicle takes place when the wheels of the motor vehicle are each resting on one of the wheel mounts. The radiation characteristic of the headlights of the motor vehicle is measured when the lifting devices of the wheel mounts are all in the first operating position and/or when the wheel hub lifting devices are all in the second operating position.

This arrangement according to claim 1 is particularly advantageous for a test lane in which - for example as part of a general inspection of a motor vehicle - various functions of the motor vehicle are to be tested, but at the same time the space required for the test lane as a whole should remain limited. In the vehicle test stand, certain functions of the motor vehicle can be tested by simulating driving states of the motor vehicle. This is not possible with the known test lanes for main inspections because there are no vehicle test benches in these test lanes.

At the same time, in the arrangement according to the present invention, the position at which the motor vehicle stands up over the individual wheels when the headlight test is carried out is defined by the wheel mounts of the vehicle test bench. This saves space compared to an arrangement that includes a vehicle test stand and in which a separate area is provided in which the vehicle is set up in order to carry out the headlight test. In the longitudinal direction of the motor vehicle, the test lane is shorter by more than one vehicle length in an arrangement according to the present invention. This is a major advantage because such test lanes are often located on properties with limited space, for example within large cities. If several test lanes are then arranged next to each other, the overall effect of the space advantage with the individual test lane is all the more significant.

A further advantage is that it is no longer necessary to design a larger surface area in which the vehicle could stand during the headlight test with the high demands on the tolerances with regard to the evenness of this surface. According to the present invention, the positions at which the vehicle wheels stand during the headlight test are defined by the wheel mounts of the vehicle test stand. It is sufficient if the wheel mounts are in one plane or if the contact surfaces of the lifting devices are in one plane when the lifting devices are in the second operating position.

In the embodiment of the arrangement according to claim 1, the testing device (and thus its intrinsic coordinate system) can be aligned in the known manner with the axis of symmetry of the motor vehicle. For this purpose, the test facility has its own alignment system with a laser line that is projected onto the vehicle. The test equipment is aligned when the projected line is symmetrical to the axis of symmetry of the motor vehicle.

Claim 2 relates to a development of the arrangement in which the vehicle test stand is assigned a measuring and evaluation device for measuring the position and orientation of the axis of symmetry of the motor vehicle in the vehicle test stand. In addition, the arrangement has a positioning and/or evaluation device. As far as a positioning device is concerned, the test device is positioned and aligned in such a way that the intrinsic coordinate system of the test device is aligned in relation to the orientation of the axis of symmetry of the motor vehicle. As far as an evaluation device is concerned, a deviation with regard to the orientation of the intrinsic coordinate system of the test device from the axis of symmetry of the motor vehicle is taken into account.

• ➢ Z-Achse: Vertikale
• ➢ X-Y-Ebene: horizontale Ebene senkrecht zur Z-Achse
• ➢ X-Achse: Symmetrieachse des Fahrzeugprüfstandes gebildet durch die Gerade, die durch die Projektion der beiden Mittelpunkte in der X-Y-Ebene der Verbindungslinien zwischen den Radaufnahmen für die Räder einer Fahrzeugachse auf den beiden Fahrzeugseiten links und rechts definiert ist.
• ➢ Y-Achse: senkrecht zur X-Achse und zur Z-Achse.

In the embodiment according to claim 2, the position and orientation of the axis of symmetry of the motor vehicle is detected in the vehicle test bench by the measuring and evaluating device. For this purpose, a Cartesian X,Y,Z coordinate system can be defined for the vehicle test bench as follows:

• ➢ Z-Axis: Vertical
• ➢ XY plane: horizontal plane perpendicular to the Z axis
• ➢ X-axis: Axis of symmetry of the vehicle test bench formed by the straight line that is defined by the projection of the two midpoints in the XY plane of the connecting lines between the wheel mounts for the wheels of a vehicle axle on the left and right sides of the vehicle.
• ➢ Y-axis: perpendicular to the X-axis and to the Z-axis.

The vehicle test stand can be installed in such a way that the wheel mounts are on one level. This plane is the X-Y plane, which is usefully horizontal. The Z-axis is then perpendicular to this horizontal X-Y plane (and thus forms the vertical). It is also possible that the X-Y plane is inclined with respect to the horizontal plane. As a result, the structural design of the positioning device and the effort in the evaluation device for the testing device subsequently become correspondingly greater, because then reference must be made to the (inclined) X-Y plane.

A calibration device can be provided for the vehicle test stand, with which the coordinate system of the vehicle test stand is defined. This calibration device is then recorded by the measuring and evaluation device. The measured values of the measuring and evaluation device are then related to the coordinate system of the vehicle test stand. The position and the orientation of the axis of symmetry of the motor vehicle in the coordinate system of the vehicle test stand can thus be recorded with the measuring and evaluation device.

A measuring device for measuring the axis of symmetry of a motor vehicle that is standing on the wheel mounts of a test bench, relative to an axis of symmetry of the vehicle test bench, is known, for example, from DE 10 2018 128 798 A1 known. The orientation and position of the wheels of a motor vehicle are determined using point lasers. The position and orientation of the point lasers is defined relative to the coordinate system of the vehicle test stand—for example as described above.

From this, the position and the orientation of an axis of symmetry of the motor vehicle in the X-Y plane of the vehicle test bench relative to the axis of symmetry of the vehicle test bench can be determined.

The intrinsic coordinate system of the test device can be aligned with the direction of the axis of symmetry of the motor vehicle by rotating the test device around the vertical (Z-axis). This can be done using the positioning device. Another possibility is to take into account (arithmetically) the deviation of the axis of symmetry of the motor vehicle from the axis of symmetry of the vehicle test stand when evaluating the headlight adjustment test in the evaluation device. The procedure with the computational consideration of a (remaining) deviation of the intrinsic coordinate system of the test device from the symmetry axis of the vehicle can also be combined with the positioning device by aligning the intrinsic coordinate data system of the test device "in the direction" of the symmetry axis of the vehicle test bench. A remaining deviation between the axis of symmetry of the vehicle test stand and the axis of symmetry of the vehicle can be taken into account by the evaluation device.

The testing device can be positioned directly in front of a headlight of a motor vehicle by means of a positioning device.

In the measuring position in which the wheels of the motor vehicle rest on the contact surfaces of the lifting devices in their raised position (second operating position of the lifting devices of the wheel mounts), the headlight radiation characteristics can only be checked under static conditions.

It is also possible to carry out the radiation characteristics of the headlights in a measuring position of the motor vehicle in which the wheels of the motor vehicle have sunk between the rollers of the respective wheel mounts (first operating position of the lifting devices of the wheel mounts). The Z coordinates of the contact lines of the wheels of the motor vehicle are defined less precisely. The tolerances depend on how precisely the wheel mounts as such are mounted or positioned relative to one another. This relates essentially to an adjustment of the distance between the wheel mounts in the X-direction for adaptation to the wheelbase of a motor vehicle to be tested. In addition, the tolerances also depend significantly on whether driving operation is simulated, during which the motor vehicle then (more or less unavoidably) moves in the test bench. In this measuring position, however, the radiation characteristics of a headlight can be checked under (simulated) driving conditions.

The radiation characteristics of a headlight can advantageously be checked if the check is carried out in the two described measuring positions of the motor vehicle in succession. If the motor vehicle stands on the contact surfaces of the lifting devices in their raised position (second operating position of the lifting devices of the wheel mounts), a "basic setting" of a headlight with regard to the direction of radiation (static, i.e.: without driving simulation) can be checked with high precision. In addition, in the measuring position in which the motor vehicle is in the position in which its wheels have sunk between the rollers of the respective wheel mounts (first operating position of the lifting devices of the wheel mounts), the radiation characteristics can be checked under driving dynamics conditions. Such a combination advantageously enables comprehensive testing of the radiation characteristics of a headlight.

• ➢ wenn die Orientierung des intrinsischen Koordinatensystems der Prüfeinrichtung relativ zum Koordinatensystem des Fahrzeugprüfstands bekannt ist und
• ➢ wenn die Ausrichtung der Symmetrieachse des Kraftfahrzeugs relativ zur Symmetrieachse des Fahrzeugprüfstands bekannt ist.

It is possible to align the test device relative to the motor vehicle

• ➢ if the orientation of the intrinsic coordinate system of the test facility relative to the coordinate system of the vehicle test bench is known and
• ➢ if the orientation of the symmetry axis of the motor vehicle relative to the symmetry axis of the vehicle test bench is known.

• ➢ die Orientierung des intrinsischen Koordinatensystems der Prüfeinrichtung relativ zum Koordinatensystem des Fahrzeugprüfstands bekannt sowie
• ➢ die Orientierung der Symmetrieachse des Kraftfahrzeugs relativ zur Symmetrieachse des Fahrzeugprüfstands.

It is also possible, if necessary, to leave the orientation of the intrinsic coordinate system of the testing device unchanged and to take it into account when evaluating the measured emission characteristics of the headlights of the motor vehicle. Also here is

• ➢ the orientation of the intrinsic coordinate system of the test facility relative to the coordinate system of the vehicle test bench is known, and
• ➢ the orientation of the symmetry axis of the motor vehicle relative to the symmetry axis of the vehicle test bench.

Instead of the (mechanical) alignment of the test device, this procedure is taken into account in the evaluation (i.e.: mathematically).

In the configuration of the arrangement according to claim 3, the vehicle test stand is designed for positioning and aligning the orientation of an axis of symmetry of the motor vehicle in the X-Y plane of the vehicle test stand.

Configurations of vehicle test benches are already known which enable the motor vehicle to be positioned and aligned in the vehicle test bench. For this, for example, the German patent application DE 10 2015 115 607 A1 referred.

If the double rollers of the individual wheel mounts can be rotated in such a way that the orientation of the central axes of the rollers changes, forces can be introduced onto the corresponding wheel of the motor vehicle, depending on the orientation of the central axes of the two rollers relative to the running direction of the upright wheel. The orientations of the central axes of the rollers of the wheel mounts of the vehicle test stand can be set—coordinated with one another—in such a way that the motor vehicle is moved laterally in the vehicle test stand to a target position and is held there.

In particular and particularly advantageously, the motor vehicle can thus be positioned and aligned in the test bench in such a way that the axis of symmetry of the motor vehicle coincides with the axis of symmetry of the vehicle test bench.

With such a configuration of the vehicle test stand, there are various advantages. On the one hand, the vehicle can be aligned in the vehicle test stand with regard to the position in the Y direction and with regard to the orientation of the axis of symmetry of the motor vehicle. The X position of the motor vehicle is defined by the position of the wheel mounts for the wheels of the motor vehicle.

A further advantage of the embodiment according to claim 3 is that it is possible with this vehicle test stand to test the radiation characteristics of the headlights of a motor vehicle under simulated driving conditions. In particular, the position and the orientation of the motor vehicle in the vehicle test bench can also be controlled to a target position during the simulated driving conditions—even when the steering angle of the wheels of the steerable axle corresponds to cornering. If the position or orientation of the motor vehicle deviates from this target position, rotating the rollers of the wheel mount about a vertical axis can introduce forces onto the respective wheel of the motor vehicle, causing the position of this wheel to change in the Y direction.

This introduction of the forces can advantageously also take place when cornering of the motor vehicle is simulated. A steering angle is set on the wheels of the steerable axle of the motor vehicle. If the wheel mounts are firmly attached, forces are introduced into the motor vehicle by this steering angle in simulated driving, which move the vehicle in a lateral direction. These forces can be compensated for by rotating the wheel mounts, so that the motor vehicle remains in the desired position.

If a radiation characteristic of the headlights of a motor vehicle also depends on driving conditions in which the systems of the motor vehicle detect a driving speed greater than zero, the design of the vehicle test bench according to claim 3 offers the advantage that it is possible with this vehicle test bench to drive under different to simulate driving conditions. This can then also include driving with turned wheels. The adjustability of the wheel mounts means that the vehicle is not lifted out of the side of the test bench, but is controlled more or less stably to its target position.

Driving operation can be simulated in the measuring position in which the wheels of the motor vehicle have sunk between the two rollers of the wheel mount (first operating position of the lifting devices of the wheel mounts).

It is then possible, for example, to check the radiation characteristics of the headlights of the motor vehicle if the switching on of a cornering light in the "dipped beam" function depends not only on a steering angle, but also on exceeding a minimum speed.

It is also possible, for example, to check the change in the radiation characteristics of the headlights in the "high beam" function if an oncoming motor vehicle is detected or a motor vehicle driving ahead.

Claim 4 relates to an advantageous development of the arrangement in which other functions of the motor vehicle can be checked. The necessary elements for carrying out the check of the functions of the motor vehicle are advantageously arranged in a very space-saving manner with regard to the space requirement of a test lane.

• ➢ Wenigstens ein Bildschirm und/oder wenigstens eine Tafel zur Darstellung von Fahrsituationen,
• ➢ Wenigstens ein Objekt zur Wechselwirkung mit Sensoren zur Erfassung der Umgebung des Kraftfahrzeugs und/oder
• ➢ Wenigstens ein Sensorelement, das ausgestaltet ist
  • ➢ zur Erfassung von Messsignalen, die von dem zu prüfenden Kraftfahrzeug ausgesendet werden, sowie
  • ➢ zur Aussendung von Reaktionssignalen, die Reflexionen von Objekten als Reaktion auf die auftreffenden Messsignale entsprechen, wobei die Reaktionssignale bestimmten Fahrbedingungen entsprechen.

In the embodiment according to claim 4, the arrangement has a vehicle test bench with a wheel mount for each wheel of a motor vehicle to be tested. Furthermore, this vehicle test bench is designed to carry out a simulated driving operation. The arrangement according to claim 4 has a first surface area in the longitudinal direction of the vehicle test bench on the left side behind the vehicle test bench, and a second surface area in the longitudinal direction of the vehicle test bench on the right side behind the vehicle test bench. The following are arranged or positionable in the first surface area and in the second surface area:

• ➢ At least one screen and/or at least one panel to display driving situations,
• ➢ At least one object for interaction with sensors for detecting the surroundings of the motor vehicle and/or
• ➢ At least one sensor element that is configured
  • ➢ for the acquisition of measurement signals that are emitted by the vehicle to be tested, and
  • ➢ to emit reaction signals corresponding to reflections from objects in response to the incident measurement signals, the reaction signals corresponding to specific driving conditions.

The arrangement according to claim 4 further comprises a third surface area between the first surface area and the second surface area. This third surface area is designed for a visual inspection of the underbody area of the motor vehicle. For this purpose, either a pit is arranged in this third surface area, which extends between the wheels on one side of the vehicle and the wheels on the opposite side of the vehicle when a motor vehicle is located in the third surface area. As an alternative to the pit, a lifting element is arranged in this third surface area, with which a vehicle located in the third surface area can be lifted.

With this arrangement according to claim 4, for example, a motor vehicle can be checked in which a system is implemented as a "lane change assistant". As part of this "lane change assistant", the vehicle has sensors that can be used to detect the area behind the vehicle. This applies in particular to the areas to the side behind the vehicle.

In contrast, the current equipment of the test lanes for the main inspection is not able to carry out dynamic tests on motor vehicles, which are necessary for checking driver assistance systems through to autonomous driving. For this purpose, function test benches or steerable function test benches are required in whose wheel mounts all four wheels can be driven or braked. This function test stand instead of the single-axle brake test stand extends the test lane for the main inspection by at least 4 meters. Furthermore, space in front of and behind the motor vehicle is required for the environmental simulation device for stimulating “advanced” driver assistance systems (ADAS).

The ADAS sensors can also be radar sensors, for example, with which distances to obstacles and also the relative speed between a detected obstacle and the motor vehicle can be detected. A “lane change assistant” can thus be implemented, in which a warning is given before changing lanes if another vehicle is detected in the neighboring lane, which is at a critical distance from the motor vehicle in the sense that due to the detected relative speed of the other vehicle a critical situation can arise in the motor vehicle when changing lanes, taking into account the distance between the two vehicles.

The arrangement according to claim 4 advantageously enables a functional test of a "lane change assistant".

Two-dimensional images of scenes that can be recognized by a camera of the motor vehicle to be checked can be displayed on the screens and/or panels.

The object can be, for example, an object that transmits radar signals from the force vehicle dynamically reflected, such as Doppler generators.

In the first and the second surface area, sensor elements can also be set up that are designed to record measurement signals that are emitted by the motor vehicle to be checked. Furthermore, these sensor elements are designed to emit reaction signals that correspond to reflections from objects as a reaction to the incident measurement signals. Different driving conditions can advantageously be simulated by different reaction signals. In particular, different driving situations can be simulated with such sensor elements via the radar sensors of the motor vehicle. The sensor elements receive the radar signals emitted by the motor vehicle and send back reaction signals which, in the simulated driving mode, correspond to another vehicle which is to be driving at a certain speed relative to the motor vehicle in the vehicle test stand.

In order to test these systems of the motor vehicle, the areas to the side behind the motor vehicle are required in particular in order to arrange or position corresponding objects or sensor elements.

In this context, the arrangement according to claim 4 represents a possibility of carrying out various tests on a motor vehicle, the overall space requirement for carrying out tests on the motor vehicle being minimized.

A length slightly greater than the length of a vehicle is required for the area of the third surface element. If this third surface area is arranged relative to the vehicle test stand in accordance with claim 4, the result is a total length for the third surface area and the vehicle test stand of slightly more than two vehicle lengths. Advantageously, by using the first and the second surface area, which are arranged next to the third surface area, it can be avoided that there is a further area requirement in length in order to place the corresponding objects and sensor elements in the direction of travel (laterally) behind the to position the vehicle.

If necessary, objects, sensor elements and/or screens or panels can also be positioned in the third surface area. In this way, for example, sensors or cameras of the motor vehicle that are directed in the direction directly behind the motor vehicle can be included in the test. For this purpose, covers can be fitted over the pit or the lifting element. The objects, sensor elements and/or screens or panels can also be positioned in the third area by means of one or more portal systems.

• ➢ des ersten, zweiten und dritten Flächenbereichs,
• ➢ verbunden mit den dort vorgesehenen Objekten, Sensorelementen und/oder Bildschirmen oder Tafeln,
• ➢ in Kombination mit dem Fahrzeugprüfstand zur Durchführung von Fahrsimulationen und
• ➢ in weiterer Kombination mit der Grube bzw. dem Hebeelement in dem dritten Flächenbereich,

in einer Teilanmeldung weiterzuverfolgen.In this context, it is evident that the spatial arrangement of the first, second and third surface areas and the vehicle test stand relative to one another is also useful if this arrangement has no testing device for the radiation characteristics of the headlights of a vehicle within the meaning of claim 1. It is expressly reserved the spatial arrangement

• ➢ the first, second and third area,
• ➢ connected to the objects, sensor elements and/or screens or boards provided there,
• ➢ in combination with the vehicle test bench to carry out driving simulations and
• ➢ in further combination with the pit or the lifting element in the third area,

to be followed up in a divisional application.

In the arrangements described here, the distances between the wheel mounts can be variable in the X direction in order to be able to adapt the arrangement to vehicle types with different wheelbases. If the rollers of the wheel mounts are long enough in their axial direction, vehicles with different track widths can advantageously be positioned in the vehicle test bench. If necessary, the distances between the wheel mounts can also be changed in the Y direction in order to be able to adapt the arrangement to the track width of a motor vehicle to be tested.

In the configuration of the arrangement according to claim 5, the arrangement comprises a camera system in front of or behind the vehicle test stand in the direction of travel of the motor vehicle to be tested, the external dimensions of which are such that the camera system lies between the lanes or can be driven over by the motor vehicle without making contact. The recording direction of the camera system is such that the underbody area of the motor vehicle is captured by the camera system.

The underbody area of the motor vehicle can thus advantageously be recorded with the camera system. The captured images can be transmitted and evaluated at an evaluation station. This proves to be advantageous because the underbody area of the motor vehicle is then not must be checked in an "overhead work situation". In addition, the images captured by the camera system can be stored and thus documented as part of the inspection of the motor vehicle.

The camera system can be embedded in the floor or arranged at a low height above the floor level. In this configuration, the underbody area of the motor vehicle can be detected when the motor vehicle is located above the camera system. When the motor vehicle drives over the camera system, several images can also be recorded, for example also as video recordings. When tracking the position of the moving motor vehicle with a measuring system, the images obtained can be assigned to the position on the motor vehicle.

Instead of having the motor vehicle drive over the camera system, it is also possible to provide a transport device with which the motor vehicle is transported over the camera system at a defined speed. Such a transport system can consist, for example, of a receiving device for a vehicle wheel that is moved along a track. The vehicle wheel is gripped with the pick-up device and the motor vehicle is thus pulled as a whole. Such transport devices are known, for example, from car washes for motor vehicles. Such a transport device has the advantage that the motor vehicle is moved over the camera system at a defined speed.

There are also traversing devices, such as robots, which systematically travel through defined areas. It is possible to attach the camera system to such a traversing device and scan the area under a (stationary or possibly also moving vehicle). If the motor vehicle is stationary while the traversing device is moving, a defined speed at which the camera system is moved relative to the motor vehicle advantageously results again. In particular, it is also possible to move the camera system at different speeds in different partial areas under the motor vehicle. A different image density can thus be generated for the partial areas. In particular, the speed of the traversing device in the sub-areas can also be adjusted as a function of the vehicle type to be examined. This makes it possible to specifically increase the image density in sub-areas below the vehicle where there are critical points in the vehicle type that must be examined in particular when inspecting the underbody area.

In the embodiment described with the traversing device, an area is required in the test lane in which the motor vehicle can stand, so that the traversing device can move under the motor vehicle.

This area can be arranged, for example, in the direction of travel of the motor vehicle behind the vehicle test bench. This area can then also be a configuration for the third surface area in the configuration described in connection with claim 4 . This area is then available as an alternative to the pit or lifting element for the motor vehicle. This also applies in particular to an embodiment in which the assignment of the first, the second and the third surface area is described independently of the headlight test.

If the motor vehicle drives over the camera system when testing the underbody area or is transported via the camera system, the camera system has only a very small extent in the direction of travel of the motor vehicle to be tested on the test lane.

The length of the test lane in the direction of travel of the vehicle to be tested can thus be limited to the length of the vehicle test stand plus the test device and (if applicable) plus the space required for the camera system.

The test device for the radiation characteristics of the headlights of the motor vehicle must be at a certain distance from the motor vehicle in the direction of travel of the motor vehicle. This arrangement can be designed to be particularly space-saving if the camera system is arranged directly in front of the test device in the direction of travel of the vehicle. If the vehicle's headlight emission characteristics have been checked and, if necessary, further tests have been carried out on the vehicle test bench, the vehicle runs over the camera system when exiting the vehicle test bench, so that the underbody area of the vehicle can then be recorded.

• ➢ In jedem Fall ist mit dem Kamerasystem eine Dokumentation möglich.
• ➢ Wenn keine Beanstandungen zu finden sind, können weitere Prüfungen des Unterbodenbereichs des Kraftfahrzeugs unterbleiben.
• ➢ Wenn Auffälligkeiten festgestellt wurden, die einer genaueren Nachkontrolle unterzogen werden müssen, können diese Kraftfahrzeuge, bei denen diese Auffälligkeiten festgestellt wurden, nochmals über eine Grube gefahren werden oder mittels eines Hebeelementes angehoben werden. Wenn mehrere Prüfstraßen unmittelbar nebeneinander angeordnet sind, wird es genügen, für mehrere Prüfstraßen lediglich eine Grube bzw. lediglich ein Hebeelement vorzusehen, weil nicht alle zu prüfenden Kraftfahrzeuge einer Nachkontrolle des Unterbodenbereichs unterzogen werden müssen. Außerdem wird die Verweildauer eines Kraftfahrzeugs über der Grube bzw. auf einem Hebeelement bei einer gezielten Nachkontrolle von Auffälligkeiten wesentlich kürzer sein als bei einer vollständigen Untersuchung des Unterbodenbereichs eines Kraftfahrzeugs durch eine Sichtkontrolle mittels einer Grube oder einem Hebeelement.

Even if such a camera system may not be able to make a conclusive statement as to whether the underbody area of a motor vehicle is free of defects, such a system can be used to support the assessment.

• ➢ In any case, documentation is possible with the camera system.
• ➢ If no complaints are found, further tests of the underbody area of the motor vehicle can be omitted.
• ➢ If abnormalities are found that require a more detailed follow-up inspection, the motor vehicles in which these abnormalities were found can be driven over a pit again or lifted using a lifting element. If several test lanes are arranged directly next to each other, it will be sufficient to provide only one pit or just one lifting element for several test lanes, because not all motor vehicles to be tested have to be subjected to a follow-up inspection of the underbody area. In addition, the time a motor vehicle stays above the pit or on a lifting element will be significantly shorter with a targeted follow-up check for abnormalities than with a complete examination of the underbody area of a motor vehicle by means of a visual inspection using a pit or a lifting element.

Claim 6 relates to a method for testing the radiation characteristics of headlights of a motor vehicle using an arrangement in one of the configurations described above. In this method, the lifting devices of the wheel mounts are in the second operating position in a motor vehicle located in the vehicle test bench. In this second operating position of the lifting devices of the wheel mounts, the radiation characteristics of the headlights of the motor vehicle are measured with the testing device.

This method relates to the previously described measurement in the measurement position in which the wheels of the motor vehicle are standing on the contact surfaces of the lifting devices in their raised position.

In the embodiment of the method with an arrangement according to claim 2 (i.e.: with the measuring and evaluation device for determining the position and orientation of the axis of symmetry of the motor vehicle), the position and orientation of the axis of symmetry of the motor vehicle can be determined before the motor vehicle is lifted by means of the lifting devices is raised. This makes use of the fact that the position and orientation of the symmetry axis of the motor vehicle relative to the X-Y plane does not change between the time at which it is measured in the position at which the wheels of the motor vehicle are between the (at this moment non-driven) rollers the wheel mounts have sunk in, and the time at which the wheels of the motor vehicle stand up on the contact surfaces of the lifting devices in their raised position.

With the arrangement according to claim 2 (i.e. with the measuring and evaluation device), the motor vehicle can also be raised with the lifting devices before the position and orientation of the axis of symmetry of the motor vehicle are determined. In this configuration, the position and orientation of the axis of symmetry of the motor vehicle is only measured when the motor vehicle is in the measuring position.

In the embodiment of the method according to claim 7, the vehicle is in a measuring position in which the wheels of the motor vehicle have sunk between the two rollers of the respective wheel mount. When a motor vehicle is in the vehicle test stand, the lifting devices for the wheel mounts are in the first operating position. In this first operating position of the lifting devices of the wheel mounts, the radiation characteristics of the headlights of the motor vehicle are measured with the test device. The vehicle test stand is operated during the measurement of the radiation characteristics of the headlights of the vehicle by the test device in the sense of a simulated color drive.

In this embodiment according to claim 6, the vehicle is raised in the manner described with the lifting devices in order to be able to test the radiation characteristics of the headlights of the vehicle when driving straight ahead (statically). In addition, the radiation characteristics of the headlights can be simulated while driving if the vehicle - according to claim 7 - is not raised with the lifting devices, so that the wheels of the motor vehicle are in the state in which the wheels have sunk between the two rollers of the respective wheel mount . Driving operation of the motor vehicle can be simulated in this state. The motor vehicle is not necessarily completely stable in its position during the simulated driving operation. In many cases, however, this is sufficient for checking the change in the radiation characteristics depending on the driving conditions.

• 1: eine Anordnung zur Durchführung von Prüfungen eines mehrspurigen Kraftfahrzeugs in einer Draufsicht von oben,
• 2: eine Darstellung einer Radaufnahme des Fahrzeugprüfstandes und
• 3: eine vergrößerte Darstellung des Fahrzeugprüfstandes in der Anordnung nach der Darstellung der 1.

An embodiment of the invention is shown in the drawing. It shows:

• 1 : an arrangement for carrying out tests of a multi-lane motor vehicle in a plan view from above,
• 2 : a representation of a wheel mount of the vehicle test bench and
• 3 : an enlarged representation of the vehicle test stand in the arrangement according to the representation of the 1 .

1 shows an arrangement 1 for carrying out tests of a multi-lane motor vehicle zeugs in a plan view from above. This arrangement 1 has a vehicle test stand 2 . The vehicle test stand 2 consists of the wheel mounts 3, 4, 5, 6. In the exemplary embodiment shown, the arrangement 1 is designed for testing vehicles with two axles. The vehicle has four wheels. The vehicle test bench 2 therefore has four wheel mounts 3, 4, 5, 6. These wheel mounts 3, 4, 5, 6 are positioned so that a vehicle can stand up with its four wheels in one of the wheel mounts. In the representation of 1 the representation of the wheel mounts 3, 4, 5, 6 is a schematic representation. This vehicle test stand 2 is in the 3 shown enlarged again in the plan view from above. As an example for the other wheel mounts, wheel mount 3 is also included separately 2 shown in a lateral section.

The wheel mounts 3, 4, 5, 6 each consist of two parallel rollers, on each of which stands a wheel of the motor vehicle.

In the 1 the direction of travel of a vehicle to be tested when entering the arrangement 1 and when leaving the arrangement 1 is shown by the arrow 7 .

The four wheel mounts 3, 4, 5, 6 are positioned so that the positions of these wheel mounts 3, 4, 5, 6 form the corners of a rectangle. The axis of symmetry of the vehicle test bench is defined by a straight line that consists of the projection of the two center points of the distance in the X-Y plane between wheel mounts 3 and 4 and between wheel mounts 5 and 6. The Y-direction of the coordinate system of the vehicle test bench is perpendicular to the Z-axis (vertical) and the axis of symmetry of the vehicle test bench (X-axis) and is defined by the direction of the distance between the wheel mounts 3 and 4.

It can be seen that the wheel mounts 3, 4, 5, 6 can be positioned such that the distances between the wheel mounts 5 and 3 and between the wheel mounts 6 and 4 can be changed. As a result, the positioning of the wheel mounts 3, 4, 5, 6 can be adapted to different wheelbases of vehicles to be tested. In the illustrated embodiment, the wheel mounts 5 and 6 are displaceable in the X direction according to the arrow 8 .

In the exemplary embodiment shown, the vehicle test bench 2 is a test bench with which driving simulations can be carried out in a comprehensive sense. This includes the fact that the rollers of the wheel mounts 3, 4, 5 and 6 can be used to apply drive or braking torque to the wheels of the motor vehicle. For this purpose, at least one of the rollers of the wheel mounts 3, 4, 5, 6 can be driven and braked. It can also be seen that the wheel mounts 3 and 4 for the wheels of the steerable axle of the motor vehicle can be rotated about an axis perpendicular to the plane of the drawing. This is represented by arrows 17 and 18. This means that driving simulations can also be carried out in which steering angles are set on the motor vehicle that correspond to cornering. By rotating the wheel mounts 3 and 4 accordingly, the motor vehicle can still be held in its position in the Y direction.

Even with a steering angle of the wheels that does not correspond to driving straight ahead, forces can be introduced to the wheels of the motor vehicle by rotating the wheel mounts (and thus also rotating the axes of the rollers about an axis that is oriented perpendicular to the axes of the rollers). be so that the motor vehicle can be positioned in the Y direction.

A lifting device is arranged between each of the two rollers of a wheel mount. This lifting device is used in 2 explained in more detail. By raising the contact surfaces of the lifting devices, the wheels of the motor vehicle can be raised when the wheels of the motor vehicle have sunk between the two rollers of the respective wheel mount. This makes sense if the motor vehicle is to drive out of the vehicle test stand. The lifting devices are each located between the two rollers of the wheel mounts 3, 4, 5, 6 and can be moved vertically upwards (out of the plane of the drawing). So that the wheels of the motor vehicle are raised.

According to the present invention, these lifting devices are not only used to make it easier to move the motor vehicle out of the vehicle test stand. In the raised position, a plane in which the vehicle stands is defined by the contact surfaces of the lifting devices for the wheels of the motor vehicle in the raised position. These conditions are explained in connection with claim 1.

A portal system can be seen with the reference number 19 , which is arranged in the area in front of a motor vehicle that is located in the vehicle test stand 2 . In order to be able to adjust the distance to the bumper of the motor vehicle even if the front bumper protrudes differently from the front wheels in different types of motor vehicle, this portal system 19 can be moved in the X direction according to arrow 20 .

A test device 21 can be seen on the portal system, with which the radiation characteristics of the headlights of a motor vehicle can be tested. According to the representation of the arrow 22, this test device can be moved in the Y-direction along the carrier of the portal. This testing device can still be positioned in the Z direction (ie: in the direction out of the drawing plane, upwards or downwards). In addition, the testing device can also be adjustable in that it can be rotated about an axis in the Z direction and about an axis in the Y direction. This testing device can also have fewer adjustment options, as long as the position and the orientation of the intrinsic coordinate system of the testing device 21 relative to the coordinate system of the vehicle test stand are known.

A screen 23 is also attached to the portal system 19 . This screen 23 can be positioned in the Y direction along the portal system 19 according to the arrow 24 . The screen can also be positionable in the Z direction. In addition, the screen can be rotated about a Z-direction axis and about a Y-direction axis. This allows the screen to be aligned with on-board cameras. Scenes can be displayed on the screen to simulate specific environmental conditions. These environmental conditions can represent, for example, representations of oncoming vehicles or vehicles driving ahead, in order to be able to simulate corresponding environmental conditions during a simulated journey of a motor vehicle standing in the vehicle test stand 2, which are recognized and evaluated by cameras of the motor vehicle. This can be used, for example, to test functions such as the automatic switching off of the high beam for oncoming vehicles or the adjustment of the beam characteristics of the high beam for a vehicle driving ahead.

It can be seen that in the arrangement 1 there is still a surface area 25 which is located in front of the vehicle test stand 2 in the direction of travel of a vehicle driving into the arrangement 1 . Objects, sensor elements and/or screens or panels can be arranged in this surface area 25, with which further simulations of an environment can be carried out during simulated driving operation of a motor vehicle located in the vehicle test bench.

The vehicle test bench 2 also has a measuring and evaluation device for determining the position and orientation of an axis of symmetry of the motor vehicle in the XY plane. The measuring and evaluation device can be constructed as shown in FIG DE 10 2018 128 798 A1 .

It can be seen that in the arrangement 1, in the direction of travel of a motor vehicle driving into the arrangement 1, a third surface area 26 is arranged in the X-direction behind the vehicle test bench 2. This surface area 26 has a pit 27 which is located between the wheels of the motor vehicle when the motor vehicle is in the surface area 26 when entering the arrangement 1 . As an alternative to the pit 27, a lifting element 28 can also be present. The lifting element 28 is designed in such a way that the motor vehicle can be raised so far that the area underneath the motor vehicle can be walked on to inspect the underbody area of the motor vehicle when it is raised with the lifting element 28 . Correspondingly, an existing pit 27 is so deep that the area under the motor vehicle can be walked on in order to examine the underbody area of the motor vehicle.

A first surface area 29 is arranged to the left behind the vehicle test bench 2 . A second surface area 30 is arranged to the left behind the vehicle test bench 2 . The first surface area 29 and the second surface area 30 delimit the third surface area 26 laterally. Objects, sensor elements, screens and/or panels can be arranged in the first and second surface area for simulating environmental conditions during a simulated journey of a motor vehicle located in the vehicle test bench. An example of testing a "lane change assistant" is described in connection with claim 4. It can be seen that with this arrangement of the vehicle test stand 2, the third surface area 26 and the first surface area 29 and the second surface area 30, the necessary components for carrying out vehicle tests are arranged in a space-saving manner in relation to the X-direction. This enables the underbody area of the motor vehicle (third area 26) to be checked and a lane change assistant (vehicle test stand 2 in connection with the first area 29 and the second area 30) to be checked with a space-saving test lane structure.

It can be seen that a camera system 31 is also arranged in the arrangement 1 . This camera system 31 can be used to record the underbody area of the motor vehicle when the motor vehicle drives over this camera system 31 when driving into the vehicle test stand 2 . It is also possible, when using the camera system 31, to omit the area 26 behind the vehicle test stand 2 in the test lane. It comes with the camera system 31 a recording of the underbody area of the motor vehicle is made, so that a direct visual inspection by means of an inspection in the pit 27 or under the lifting element 28 can then be omitted. If an abnormality was detected during the recording by the camera system 31, an immediate visual inspection can also be carried out. For this purpose, a (single) pit or a (single) lifting element can be provided for several test lanes together, because not every motor vehicle to be tested has to undergo an immediate visual inspection of the underbody area. This in turn saves space along the length of the test lane. This applies in particular when the surface areas 29 and 30 are omitted or are correspondingly shortened. The camera system 31 can consist of two cameras, for example, so that a recording can be made which, by means of the stereo-photogrammetric evaluation, results in a three-dimensional image of the underbody area of the motor vehicle.

A functional unit for carrying out an exhaust gas test is also provided with the reference number 32 . Such an exhaust gas test can advantageously be carried out when the motor vehicle is in the vehicle test stand 2 . This makes it possible to carry out an exhaust gas test in simulated driving, in which the motor vehicle can be operated under different load conditions.

2 shows a representation of the wheel 3 of the vehicle test stand 2 in a lateral section. You can see reels 9 and 10. These rollers are at a certain distance from one another, so that a lifting device 201 can be arranged between these two rollers 9 and 10. This lifting device 201 is in the 2 shown in the lowered state (first operating position). A vehicle wheel resting on the wheel mount 3 sinks between the two rollers 9 and 10 so far that the outer circumference of the vehicle wheel touches both the roller 9 and the roller 10 . The lowest point of the circumference of the vehicle wheel is then between the two rollers 9 and 10. This lowest point on the outer circumference of the vehicle wheel is in any case lower than the highest point of the circumference of the rollers 9 and 10. In this state, the vehicle wheel touches the Footprint 202 of the lifting device 201 not.

According to the representation of the arrow 203 it can be seen that the contact area 202 of the lifting device 201 can be raised. As a result, a vehicle wheel that has sunk into the wheel mount 3 between the two rollers 9 and 10 is lifted. This configuration is known insofar as it makes it easier to move the motor vehicle out of the wheel mounts of a vehicle test bench.

According to the present invention, a measuring position for the motor vehicle is generated by a suitable combination of the accuracy in the assembly of the wheel mounts in connection with the accuracy in the setting of the adjustment path of the contact surface 202 of the lifting device 201 in the raised state, in which a check of the radiation characteristics of the headlights a motor vehicle can be made (second operating position of the lifting devices 201).

the 3 shows an enlarged representation of the vehicle test stand 2 in the arrangement 1 according to the representation of FIG 1 .

The wheel mounts 3, 4, 5, 6 each consist of two parallel rollers 9, 10; 11, 12; 13, 14; 15, 16, on each of which stands up a wheel of the motor vehicle. Wheel mount 3 includes rollers 9 and 10, wheel mount 4 includes rollers 11 and 12, wheel mount 5 includes rollers 13 and 14, and wheel mount 6 includes rollers 15 and 16.

In the exemplary embodiment shown, the vehicle test bench 2 is a test bench with which driving simulations can be carried out in a comprehensive sense. This includes that over the roles 9, 10; 11, 12; 13, 14; 15, 16 of the wheel mounts 3, 4, 5 and 6, respectively, drive or braking torques can be introduced to the wheels of the motor vehicle. For this purpose, at least one of the rollers 9, 10; 11, 12; 13, 14; 15, 16 of the wheel mounts 3, 4, 5, 6 can be driven and braked. It can also be seen that the wheel mounts 3 and 4 for the wheels of the steerable axle of the motor vehicle can be rotated about an axis perpendicular to the plane of the drawing. This is represented by arrows 17 and 18. This means that driving simulations can also be carried out in which steering angles are set on the motor vehicle that correspond to cornering. By rotating the wheel mounts 3 and 4 accordingly, the motor vehicle can still be held in its position in the Y direction.

Even with a steering angle of the wheels that does not correspond to driving straight ahead, forces can be introduced to the wheels of the motor vehicle by rotating the wheel mounts (and thus also rotating the axes of the rollers about an axis that is oriented perpendicular to the axes of the rollers). be so that the motor vehicle can be positioned in the Y direction.

Between the two rollers 9, 10; 11, 12; 13, 14; 15, 16 of a wheel mount 3, 4, 5, 6, a lifting device 201 is arranged in each case. This lifting device 201 is in 2 explained in more detail. By raising the contact surfaces of the lifting devices, the wheels of the motor vehicle can be raised when the wheels of the motor vehicle have sunk between the two rollers of the respective wheel mount. This makes sense if the motor vehicle is to drive out of the vehicle test stand. The lifting devices are located between the two rollers 9, 10, 11, 12; 13, 14; 15, 16 of the wheel mounts 3, 4, 5, 6 and can be moved vertically upwards (out of the plane of the drawing). So that the wheels of the motor vehicle are raised. For reasons of clarity, only the two lifting devices 201 of the wheel mounts 3 and 4 are provided with the reference number 201. The lifting device is located in the wheel mounts 5 and 6 without specifying the reference number.

The vehicle test bench 2 also has a measuring and evaluation device for determining the position and orientation of an axis of symmetry of the motor vehicle in the XY plane. The measuring and evaluation device can be constructed as shown in FIG DE 10 2018 128 798 A1 . The corresponding sensors are represented by the four crosses on each of the wheel mounts 3, 4, 5 and 6. The two sensors on the outside of the wheel mounts 3, 4, 5 and 6 are provided with the reference numbers 33, 34, 35, 36. These sensors on the outside of the wheel mounts 3, 4, 5 and 6 act in the illustrated embodiment as shown in FIG DE 10 2018 128 798 A1 with the opposite sensors on the inside of the respective wheel mounts 3, 4, 5 and 6 together. For reasons of clarity, these sensors on the insides of the respective wheel mounts are not provided with reference numbers. It is possible to provide only the two sensors for the wheels of the non-steered axle, which measure the outside of the respective wheel.

The sensors 33, 34, 35, 36 of the measuring and evaluating device are stationary relative to the wheel mounts 3, 4, 5 and 6. If these sensors 33, 34, 35, 36 are attached to a wheel mount that can be rotated about the vertical axis (here in the exemplary embodiment, wheel mounts 3 and 4), the sensors are attached in such a way that these sensors follow the rotation of the respective wheel mount . As far as wheel mounts (here in the embodiment, the wheel mounts 5 and 6) are adjustable in the X-direction to adapt the vehicle test stand 2 to vehicles with different wheelbases, the sensors that are attached to these wheel mounts are also moved in the X-direction.

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102018128798 A1 [0044, 0112, 0125]
• DE 102015115607 A1 [0055]

Claims (7)

Order (1) to carry out tests on a multi-lane motor vehicle, ➢ wherein the arrangement (1) has a test device (21) for the radiation characteristics of the headlights of the motor vehicle, ➢ the testing device (21) being designed to measure the radiation characteristics of the headlights in relation to an intrinsic coordinate system of the testing device (21), ➢ wherein the arrangement (1) has a vehicle test stand (2), ➢ the vehicle test stand (2) having wheel mounts (3, 4, 5, 6), ➢ where the number of wheel mounts (3, 4, 5, 6) of the vehicle test bench corresponds to the number of wheels of a motor vehicle to be tested, ➢ the distances between the wheel mounts (3, 4, 5, 6) being set or adjustable in such a way that one wheel of the motor vehicle to be tested rests on a wheel mount (3, 4, 5, 6), ➢ The wheel mounts (3; 4; 5; 6) consist of double rollers (9, 10; 11, 12; 13, 14; 15, 16), ➢ A lifting device (201 ) is provided, ➢ The lifting devices (201) each have a contact surface (202) for the wheel of the motor vehicle to be checked, which stands on the respective wheel mount (3, 4, 5, 6), ➢ wherein the lifting devices (201) have a first operating position in which these lifting devices (201) are lowered so far that the respective wheel of the motor vehicle to be checked rests on the two rollers (9, 10; 11, 12; 13, 14; 15 , 16) of the respective wheel mounts (3, 4, 5, 6) stands up, ➢ The lifting devices (201) have a second operating position in which these lifting devices (201) are raised so far that the respective wheel of the motor vehicle to be checked rests on the contact surface (202) of the lifting device (201) of the respective wheel mounts (3, 4 , 5, 6) gets up, ➢ the contact surfaces (202) of the lifting devices (201) of the wheel mounts (3, 4, 5, 6) forming a plane in the second operating position, ➢ wherein in the arrangement (1) the test device (21) and the vehicle test bench (2) are assigned to one another at least in one measuring operating position in such a way that the measurement of the radiation characteristics of the headlights of the motor vehicle takes place when the wheels of the motor vehicle are each on one of the wheel mounts ( 3, 4, 5, 6) get up, ➢ whereby the measurement of the radiation characteristics of the headlights of the motor vehicle takes place, ➢ when the lifting devices (201) of the wheel mounts (3, 4, 5, 6) are all in the first operating position and/or ➢ when the lifting devices (201) of the wheel mounts (3, 4, 5, 6) are all in the second operating position. arrangement according to claim 1 , characterized in that ➢ that the vehicle test bench (2) is assigned a measuring and evaluation device (33, 34, 35, 36) for measuring the position and orientation of an axis of symmetry of the motor vehicle in the vehicle test bench and ➢ that the arrangement (1) has a positioning and/or has an evaluation device (22), ➢ wherein the positioning device (22) that may be present is designed for positioning and aligning the test device (21) in such a way that the intrinsic coordinate system of the test device (21) is aligned in relation to the axis of symmetry of the motor vehicle, ➢ The evaluation device that may be present is designed to take into account a deviation in terms of the position and/or orientation of the intrinsic coordinate system of the test device (21) from the axis of symmetry of the motor vehicle. arrangement according to claim 2 , characterized in that the vehicle test bench (2) is designed for positioning and aligning the orientation of an axis of symmetry of the motor vehicle in the XY plane of the vehicle test bench (2) (17, 18). Arrangement according to one of Claims 1 until 3 , characterized in that ➢ that the arrangement (1) has a vehicle test bench (2) with a wheel mount (3, 4, 5, 6) for each wheel of a motor vehicle to be tested, ➢ the vehicle test bench (2) being designed to carry out a simulated driving operation, ➢ that the arrangement (1) has a first surface area (29) in the longitudinal direction of the vehicle test stand (2) on the left side behind the vehicle test stand (2), ➢ that the arrangement (1) has a second surface area (30) in the longitudinal direction of the vehicle test stand ( 2) on the right-hand side behind the vehicle test bench (2), ➢ being arranged or positionable in the first surface area (29) and in the second surface area (30): ➢ at least one screen and/or at least one panel for displaying driving situations, ➢ at least one object for interaction with sensors for detecting the surroundings of the motor vehicle and/or ➢ at least one sensor element which is designed ➢ for detecting Messsi gnal that of the to be transmitted from the motor vehicle to be tested, and ➢ to emit reaction signals which correspond to reflections of objects as a reaction to the measurement signals that occur, the reaction signals corresponding to certain driving conditions, ➢ that the arrangement (1) has a third surface area (26) between the first surface area (29 ) and the second surface area (30), wherein the third surface area (26) is designed for a visual inspection of the underbody area of the motor vehicle, ➢ in that a pit (27) is arranged in this third surface area (26), which is located at one in the motor vehicle located in the third surface area (26) between the wheels on one side of the vehicle and the wheels on the opposite side of the vehicle and/or ➢ in that a lifting element (28) is arranged in this third surface area (26) with which a lifting element located in the third surface area (26). vehicle can be raised. Arrangement according to one of Claims 1 until 4 , characterized in that the arrangement (1) in the direction of travel of the motor vehicle to be checked in front of or behind the vehicle test stand (2) comprises a camera system (31) whose external dimensions are such that the camera system (31) can be run over by the motor vehicle without contact can, wherein the recording direction of the camera system (31) is such that the underbody area of the motor vehicle is detected by the camera system (31). Method for testing the radiation characteristics of headlights of a motor vehicle using an arrangement according to one of Claims 1 until 5 , characterized in that ➢ that the lifting devices (201) of the wheel mounts (3, 4, 5, 6) are in the second operating position in a motor vehicle located in the vehicle test bench (2) and ➢ that in this second operating position the lifting devices (201) of the wheel mounts (3, 4, 5, 6) the radiation characteristics of the headlights of the motor vehicle are measured with the testing device (21). procedure after claim 6 , characterized in that ➢ that the lifting devices (201) of the wheel mounts (3, 4, 5, 6) are in the first operating position when the motor vehicle is in the vehicle test stand (2), ➢ that in this first operating position the lifting devices (201) of the wheel mounts (3, 4, 5, 6) the radiation characteristics of the headlights of the motor vehicle are measured with the test device (21) and ➢ that the vehicle test stand (2) during the measurement of the radiation characteristics of the headlights of the motor vehicle by the test device (21) in terms of of a simulated color drive is operated.

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