• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a method for controlling an adaptive light function of a motor vehicle headlight cooperating with a motor vehicle, in which, starting from a total light distribution of the adaptive light function, a segment (1 ', 2', 3 ', 4', 5 ') of the total light distribution, in which is an object (2) to be protected against glare, by dimming at least one luminous element corresponding to said segment (1 ', 2', 3 ', 4', 5 ') of one providing the adaptive light function and a plurality of Dimming is carried out in accordance with at least one control data set of a self-correcting algorithm, wherein the algorithm comprises at least a first correction element dimming in accordance with analysis data optical detection of Umkantekanten the object which is fed back with the optical data analysis data is pelt and a change of the first correction term is made when a lighting error is detected.
    公开号:AT517811A1
    申请号:T50858/2015
    申请日:2015-10-07
    公开日:2017-04-15
    发明作者:Miedler Stefan；Ebner Martin
    申请人:Zkw Group Gmbh；
    IPC主号:
    专利说明:

    Method for controlling an adaptive light function and motor vehicle headlights
    The invention relates to a method for controlling an adaptive light function of a motor vehicle headlight cooperating with a motor vehicle, in which, starting from a total light distribution of the adaptive light function, a segment of the total light distribution in which an object to be protected against glare is located by dimming at least one, said segment corresponding lighting element of the adaptive light function providing and a plurality of lighting elements having light unit of the motor vehicle headlight is darkened, wherein the dimming takes place in coordination with analysis data of an optical detection of contour edges of the object, and a corresponding motor vehicle headlight.
    Recently, more and more automobile headlamps with adaptive high beam function are finding their way onto the market. In contrast to the conventional high beam function, in which a very strong luminous flux is emitted with a light distribution in front of the vehicle, which in principle carries the risk of dazzling oncoming or leading traffic or pedestrians and cyclists in itself, and in contrast to a low beam function, in which the light of a motor vehicle headlight to avoid glare of traffic is relatively flat and therefore only just emitted in front of the vehicle, adaptive high beam functions are characterized by the fact that starting from a high beam function and a corresponding light distribution individual pixels or segments of the light image can be darkened to prevent dazzling of road users in these segments of light distribution. A prerequisite for this are motor vehicle headlamps whose total light distribution in the high beam mode is formed by a large number of individual luminous elements which respectively correspond to a specific segment of the high beam distribution or illuminate such a segment and which can be controlled individually in order to dim or completely switch them off.
    For realizing such a high beam function further camera systems and corresponding evaluation systems for the data are required, which are obtained with the optical detection by the camera, wherein the camera or the plurality of cameras receives the Be rich in front of the vehicle and with known in the art Software outline edges of objects to be protected from possible glare to be detected and fed to a computer, so that the corresponding segments, ie the corresponding lighting elements, the motor vehicle headlight can be darkened.
    Since the dazzling of oncoming traffic or leading traffic represents a relatively large problem in terms of traffic safety, relatively large safety distances to the objects to be excluded from glare are required, whereby the observance of the required safety distances due to the latency, the camera systems or the systems consisting of camera and Auswertelogik often leads to very large areas and especially very darkened areas in the total distance distribution, which can take on the use of relatively inexpensive and therefore slow camera systems to dimensions that are unsatisfactory for the user of vehicles with such adaptive high beam functions. In order to counter this, it has been proposed, for example, in EP 2 281 719 A1, to select the area which is darkened for an oncoming or preceding vehicle or object, in its width, at which position an object is or with which speed it moves horizontally in the light image of the high beam function. The darker area is chosen the wider the faster such an object moves sideways in order to sufficiently take into account the time delay, which elapses from the detection of the object and its movement to the actuation of the motor vehicle headlight. However, such a control does not always allow a satisfactory control and, above all, no prediction or prediction of the behavior of an object to be excluded from glare so that even with such systems, only unsatisfactory lighting conditions continue to be achieved.
    It is therefore an object of the present invention to improve a method of the type mentioned in that, despite the use of relatively cheap and therefore slow camera systems, an optimization of adaptive high beam functions succeed, in particular a prediction or prediction of the behavior of before glare protective road users. To achieve this object, a method for controlling an adaptive light function of the type mentioned in the present invention according to the invention further developed such that the dimming in accordance with at least one
    Control data set of a self-correcting algorithm is carried out, wherein the algorithm comprises at least a first correction element, which is fed back with the analysis data of the optical detection and a change of the first correction element is taken before, if a lighting error is detected. The algorithm for controlling the adaptive light function, as a rule an adaptive high beam function, thus makes use of a control data record which, for certain situations, provides a specific behavior of the motor vehicle headlight, similar to the prior art. However, the algorithm according to the method of the present invention is self-correcting in that the algorithm includes a correction term in which analysis data of the optical detection by the camera system is applied and a change of the correction term is made when an illumination error is detected. This means that the method according to the invention makes use of an algorithm with a control data record which, in the event that the correction term does not change, that is to say for. the case where the correction term is neutral, determines the behavior of the headlamp. If now due to the optical detection, a lighting error is detected, a change of the first correction element, so that the primarily caused by the control data set behavior of the motor vehicle headlamp is changed because the algorithm provides the result of total tax record and first correction element as control signals to the motor vehicle headlight. Illumination errors in connection with the present invention are defined as unsatisfactory illumination states of the adaptive light function, which will be discussed in more detail below.
    In particular, it is provided according to a preferred embodiment of the present invention that a dimming of a luminous element is classified as illumination error, which corresponds to a segment of the total light distribution, in which there is no object to be protected from glare. Such an illumination error is thus an area of the adaptive light function that is darkened too broadly, which means that a further light-emitting element or a row of illumination elements of the motor vehicle headlight that correspond to a segment of the light distribution could have remained superimposed without dazzling the light to be protected from glare Object would be done. In this case, the dark range of the adaptive light function is unnecessarily wide. If such a lighting error is detected, a change of the first correction term, so that the algorithm using the control data and the first correction element provides changed control signals and an optimization of the light image takes place.
    Alternatively or additionally, according to a preferred embodiment of the present invention, at least partial illumination of an object to be protected against glare can be classified as a lighting error. In this case, the algorithm has led to glare of an object using the control data set, which is optically detected and leads to a change of the first correction term. The first correction term and other correction terms, which will be explained in detail later, thus serve to cause a change of control signals, which is determined by the algorithm based on the basic control behavior set in the control data set, if deemed necessary by the driving situation.
    In principle, in connection with the present invention, it is conceivable to dim lighting elements to varying degrees in order to avoid dazzling, for example, of oncoming traffic. In order to protect road users to be protected from glare, it may also be provided in this connection that the dimming takes place as switching off the at least one lighting element corresponding to the said segment.
    In principle, it is conceivable to make a change of the first correction element each time a lighting fault as defined above occurs. According to a preferred embodiment of the present invention, however, the method according to the invention is developed such that a change in the first correction term is made if, due to the optical detection of contour edges of objects in a specific detection period, an illumination error of at least 5% to 15%, preferably 10 % of the number of optically captured objects is detected. Thus, in this preferred variant, a lighting error does not lead to an immediate change of the first correction element, but a statistical detection and evaluation is carried out in order to avoid frequent occurrence of illumination errors.
    A control data record for the method according to the invention prescribes for the motor vehicle headlight a certain behavior or certain safety distances to the objects to be protected from glare for different driving situations. Driving situations can hereby be classified according to the driving speed of the motor vehicle, the size of the detected object, the position of the detected object and the like, and corresponding behavior patterns for the motor vehicle headlight can be defined. Preference is given here derge stalt proceeded that the at least one control data set is created using test situations and the algorithm is provided. This means that the algorithm is determined, for example, in the headlight manufacturer or the motor vehicle manufacturer using the method according to the invention in a test phase for the headlight or the motor vehicle by training the algorithm in real or fake test situations, with such training of the algorithm According to experience, real or fake test situations lead to control data records which can already yield very satisfactory results with regard to adaptive lighting functions.
    In order to achieve a further improvement of the behavior of motor vehicle headlamps with adaptive light functions, the method according to the invention is preferably further developed such that the algorithm comprises a second correction element and the at least one control data set in the second correction element is related to the rank of a road. While the first correction term is fed back to the camera system and hence to the outside world and can be included in the algorithm for correcting the control record, the second correction term is used to match the headlight depending on the rank of a road, i. depending on whether it is a motorway, main road, country road or a street in the local area, to apply a different behavior. For example, on a highway where slower or at least continuous changes in the position of objects to be protected against glare are to be expected, it may be provided to direct the headlamp to illuminate closer to these objects, whereas on a country road the one Variety of tight curves may have a dazzling, for example, of oncoming traffic due to relative rapid changes in position in the horizontal direction of the objects is more likely to be assumed and the headlamp should therefore be operated with greater safety distances. The second correction element operates independently of the first correction element and can superimpose the corrections that are made by a change of the first correction element. The second correction element can be changed either manually or for example by the evaluation of GPS data, so that either the driver of a motor vehicle can tell the algorithm of the method according to the invention on which road the vehicle is located, or an automatic presetting on the basis of the GPS Data can be done.
    Similarly, it can be provided according to a preferred embodiment of the method according to the invention that the algorithm comprises a third correction element and the at least one control data set in the third correction element is set to a selected operating mode of the motor vehicle in relation. The third correction element is in turn independent of the first and second correction elements and may serve, for example, to map operating modes of a motor vehicle, such as a sports mode or a comfort mode, also in the behavior of the headlight when using the adaptive light function. For example, in sports mode, in turn, it could be closer to an object to be protected from glare in order to ensure improved illumination of the roadway, whereas in the comfort mode a more moderate driving style is assumed, so that wider safety margins due to the leisurely driving style do not interfere.
    According to a further preferred embodiment of the present invention, the method may be developed such that the algorithm comprises a fourth correction element and the at least one control data set in the fourth correction element is related to the vehicle speed. The fourth correction element can also operate independently of the other correction elements, as a rule a higher motor vehicle speed leads to wider safety distances to reliably avoid the glare of objects to be protected against glare.
    The fourth correction element can preferably have the effect that the at least one control data set in the fourth correction element is related to a steering angle of a steering wheel of the motor vehicle, with a large steering angle of the steering wheel of the motor vehicle with a rapidly anticipated horizontal movement of objects to be excluded from glare in the photograph of Motor vehicle headlights are associated and therefore greater safety distances can be adjusted.
    Preferably, the at least one control data set in the fourth correction element is set in relation to a yaw rate of the steering wheel of the motor vehicle, wherein, similar to a high impact angle, a high yaw rate of the steering wheel will lead to wider safety margins.
    In the final consequence, it is conceivable in this context that the at least one control data record in the fourth correction element with an expected yaw rate of the steering wheel of
    Motor vehicle related, as this corresponds to a preferred embodiment of the present invention. An expected yaw rate of the steering wheel can be obtained, for example, from GPS data, if it is assumed that a vehicle has to follow the course of a road on which the vehicle is moving.
    If, in the operation of the motor vehicle headlight with the method according to the invention, it turns out that the control data record frequently leads to illumination errors as defined above, it can also be provided according to a preferred embodiment of the present invention that the at least one control data record is variable as a function of values of the first correction term , Thus, in the event that a frequent change of the first correction element to avoid illumination errors is necessary to make a permanent or temporary change in the control data of the algorithm, so that even without the effect of the first correction element already optimized illumination is achieved.
    A preferred embodiment of the present inventive method is characterized in that the intensity of the dimming is selected depending on the probability of a lighting error. This means that changes in the first correction element can be detected in order to avoid illumination errors detected by the optical detection and can be statistically evaluated with regard to the occurrence of illumination errors in certain driving situations taken into account in the control data record. As a result, a certain intensity of the dimming-from 0% dimming to 100% dimming-can be assigned to a certain expected probability of the occurrence of a lighting fault, or such a dimming intensity can be set depending on the expected probability of occurrence of a lighting fault. As a rule, for this preferred variant of the invention, only the aperture or the at least partial illumination of an object to be protected against glare is classified as a lighting error.
    By adjusting the intensity of the dimming depending on a probability of the occurrence of a lighting error, a certain error rate is obviously perceived as tolerable or justifiable. This considered as acceptable lighting error probability can be made dependent on the current acceleration of the motor vehicle according to a preferred embodiment of the present invention. For example, with uniform travel of the motor vehicle, 10% probability of illumination error can be assumed as justifiable and full dimming can only be achieved at 10% illumination error probability, while at an acceleration of, for example, 5 m / s2, only 5% illumination error probability is assumed to be acceptable Dimming already occurs at 5% illumination error probability.
    A motor vehicle headlight according to the invention is characterized by an adaptive light function controlled according to the method just described.
    The invention will be explained in more detail with reference to an embodiment schematically illustrated in the drawing. In this show:
    1 shows a typical situation of an oncoming vehicle, which is to be protected against glare by a high beam function,
    FIG. 2 is a schematic diagram of an adaptive light function in which an area around the oncoming vehicle has been blanked using a prior art method; FIG.
    FIG. 3 shows the development of the situation from FIG. 2, FIG.
    FIG. 4 shows an improved lighting situation according to the method of the invention, FIG.
    5 shows the development of the lighting situation from FIG. 4, FIG.
    FIG. 6 is a diagram illustrating the intensity of dimming depending on a reasonable illumination error probability. FIG.
    7 is a diagram illustrating the decrease of the reasonable illuminance error probability depending on the acceleration of the vehicle;
    FIG. 8 is a diagram illustrating the intensity of dimming depending on a reasonable illumination error probability lower than that in FIG. 6; and FIG
    9 is a flow chart to illustrate the method according to the invention.
    In Fig. 1, a carriageway is designated 1, on which there is an object to be protected from glare 2, in this case an oncoming vehicle, which is to be excluded from dazzling by high beam. The vehicle 2 can, as indicated by the brackets 3, be optically detected by a camera system, wherein the optical detection provides a relative object width o and limits obi and obr. At the same time, a relative velocity, represented by the vector v, is determined.
    When using prior art methods and especially when used in combination with slow camera systems, i. a slow optical detection, a number of segments 2 ', 3', 4 'and 5' is dimmed by dimming of the said segments corresponding lighting elements of a lighting unit of a motor vehicle headlight to safely prevent dazzling of the vehicle 2. To avoid the glare of the object 2, however, only a darkening of the segments 4 'and 5' would be necessary, so that the darkening of the segments 2 'and 3' is a lighting error in the sense of too wide darkening, as there is no object in these segments , which is to protect against glare. The width of the safety distance left of the object 2 is indicated in Fig. 2 with ai.
    Fig. 2 thus represents a lighting error, since a luminous element has been dimmed, which corresponds to a segment of the total light distribution, in which there is no object to be protected from glare. This segment is in this case the segment 3 ', wherein a further luminous element has been dimmed, which corresponds to the segment 2', in which there is also no object to be protected from glare. Only when approaching the vehicle, as shown in Fig. 3, is the object 2 in the previously dimmed segments 2 ', 31, 4' and 51, wherein now to establish a safety distance ai another segment V and another Luminous element was darkened, which also brings an unnecessarily wide darkening of the overall light distribution with it. In all figures, the non-darkened segments of the total light distribution are shown hatched.
    The illustrated in Fig. 3, right safety distance ar is not classified as a lighting error, since in the segment 5 'is the object to be protected against glare 2.
    FIG. 4 now shows an adaptive high beam function controlled by the method according to the invention, in which only those segments 4 'and 5' in which the object 2 is actually located are darkened, which is due to the inventive correction of the algorithm.
    In FIG. 5, it can be seen that, when the object 2 approaches, two further lighting elements or segments 2 'and 3' are darkened, but the segment V is not darkened due to the inventive self-correcting algorithm.
    FIG. 6 shows that, according to the preferred variant of the present invention described above, the intensity of the dimming can be made dependent on the glare probability, which can be determined via the optical detection of the object edges for the respective driving situation. The method can accordingly be carried out in such a way that, with a very low glare probability (eg 0% glare probability), a luminous element of the motor vehicle headlight in question is not dimmed, the intensity of the dimming increasing with increasing glare probability. In the example shown in FIG. 6, a glare probability of more than 10% has been defined as unacceptable, so that for light elements corresponding to segments of the total light distribution in which a glare probability of more than 10% is given, a complete dimming (100% dimming) is achieved ), ie a switching off of at least one of said segment (V, 2 ', 3', 4 ', 5') corresponding luminous element takes place.
    FIG. 7 shows that the glare probability regarded as justifiable can decrease with increasing acceleration of the vehicle, which leads to complete dimming (100% dimming), for example, already occurring at 5% glare probability, as can be seen in FIG. 8 ,
    Based on the illustration in FIG. 9, the method according to the invention can be clearly explained. A driving situation is optically detected by a camera system, wherein in particular an optical detection of contour edges of an object to be protected against glare takes place. The analysis data of the optical detection are fed to an algorithm which, in accordance with a control data set, dimming a light element of the adaptive light function providing and having a plurality of light elements having tint unit of a motor vehicle headlamp, which corresponds to a segment of the total light distribution by a to be protected from glare Object, usually a vehicle or a pedestrian, is located. The control signals generated with the aid of the control data set pass through a first correction element, which remains a priori neutral so as not to influence the control signals. With the control signals, the adaptive high beam function is controlled and carried out in the sequence of an optical detection of any illumination errors. When it is determined that a lighting failure occurs or illumination errors occur too frequently, feedback of the optical detection with the correction term results in a change in the correction term, so that the control signals output from the control data are changed by the effect of the first correction term, to avoid the illumination error in the respective driving situation. Further correction elements can, as already described, be provided in order to make adjustments to the rank of a road, the operating mode of the motor vehicle or to the driving behavior of the driver. The said second, third and fourth correction elements behave a priori neutrally as well as the first correction element and unfold their effect on the control data output from the control data only after activation of these correction elements in the cases described above.
    权利要求:
    Claims (15)
    [1]
    claims
    1. A method for controlling an adaptive light function of a motor vehicle headlight interacting with a motor vehicle, in which, starting from a total light distribution of the adaptive light function, a segment (Γ, 2 ', 3', 4 ', 5') of the total light distribution, in which a before glare object (2) to be protected is dimmed by dimming at least one lighting element of the motor vehicle headlight that corresponds to the said segment (Γ, 2 ', 3', 4 ', 5') of a lighting unit of the motor vehicle headlight that provides the adaptive lighting function and has a plurality of lighting elements, wherein the dimming is carried out in coordination with analysis data of an optical detection of contour edges of the object, characterized in that the dimming in accordance with at least one control data set of a self-correcting algorithm, wherein the algorithm comprises at least a first correction term, which rüc with the analysis data of the optical detection is coupled and a change of the first correction term is made when a lighting fault is detected.
    [2]
    2. The method according to claim 1, characterized in that a dimming of a light element is classified as a lighting error, which corresponds to a segment (1 ', 2', 3 ', 4', 5 ') of the total light distribution, in which no glare before protective object (2) is located.
    [3]
    3. The method of claim 1 or 2, characterized in that is classified as illumination error, at least partial illumination of an object to be protected against glare (2).
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that the dimming as switching off the at least one of said segment (Γ, 2 ', 3', 4 ', 5') corresponding luminous element takes place.
    [5]
    5. Method according to claim 1, characterized in that a change of the first correction element is made if, due to the optical detection of contour edges of objects (2) in a certain detection period, an illumination error with respect to at least 5% to 15%, preferably 10% of the number of optically detected objects (2) is detected.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the at least one control data set is created using test situations and provided to the algorithm available.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that the algorithm comprises a second correction element and the at least one control data set in the second correction element to the rank of a road (1) is related.
    [8]
    8. The method according to any one of claims 1 to 7, characterized in that the algorithm comprises a third correction element and the at least one control data set in the third correction element is set to a selected operating mode of the motor vehicle in relation.
    [9]
    9. The method according to any one of claims 1 to 8, characterized in that the algorithm comprises a fourth correction element and the at least one control data set is set in the fourth correction element to the motor vehicle speed in relation.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that the at least one control data set in the fourth correction member is set to a steering angle of a steering wheel of the motor vehicle in relation.
    [11]
    11. The method according to any one of claims 1 to 10, characterized in that the at least one control data set in the fourth correction member is set to a yaw rate of the steering wheel of the motor vehicle in relation.
    [12]
    12. The method according to any one of claims 1 to 11, characterized in that the at least one control data set is set in the fourth correction member with an expected yaw rate of the steering wheel of the motor vehicle in relation.
    [13]
    13. The method according to any one of claims 1 to 12, characterized in that the at least one control data set is variable in dependence on values of the first correction element.
    [14]
    14. The method according to any one of claims 1 to 13, characterized in that the intensity of the dimming is selected depending on the probability of a lighting error in a given driving situation.
    [15]
    15. A motor vehicle headlamp with a controlled by a method according to one of claims 1 to 14 adaptive light function.
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
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