EP2748033A1 - Procédé, appareil de commande et produit-programme informatique pour régler la hauteur de faisceau d'un phare de véhicule - Google Patents

Procédé, appareil de commande et produit-programme informatique pour régler la hauteur de faisceau d'un phare de véhicule

Info

Publication number
EP2748033A1
EP2748033A1 EP12729148.2A EP12729148A EP2748033A1 EP 2748033 A1 EP2748033 A1 EP 2748033A1 EP 12729148 A EP12729148 A EP 12729148A EP 2748033 A1 EP2748033 A1 EP 2748033A1
Authority
EP
European Patent Office
Prior art keywords
vehicle
signal
providing
headlamp
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12729148.2A
Other languages
German (de)
English (en)
Inventor
Tobias Ehlgen
Thomas Friedrich
Johannes FOLTIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2748033A1 publication Critical patent/EP2748033A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/08—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically
    • B60Q1/10—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/08—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically
    • B60Q1/10—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution
    • B60Q1/115—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically due to vehicle inclination, e.g. due to load distribution by electric means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/11—Linear movements of the vehicle
    • B60Q2300/112—Vehicle speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/11—Linear movements of the vehicle
    • B60Q2300/114—Vehicle acceleration or deceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/10—Indexing codes relating to particular vehicle conditions
    • B60Q2300/13—Attitude of the vehicle body
    • B60Q2300/132—Pitch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30—Indexing codes relating to the vehicle environment
    • B60Q2300/32—Road surface or travel path
    • B60Q2300/324—Road inclination, e.g. uphill or downhill

Definitions

  • the present invention relates to a method for adjusting a
  • the visibility at night is related to the brightness of the headlights.
  • Headlamps with high-pressure gas discharge lamps are much brighter than headlights with halogen bulbs (“halogen headlamps”.
  • xenon headlamps headlamps with high-pressure gas discharge lamps
  • halogen headlamps headlamps
  • Headlamp leveling and a headlamp washer system This significantly increases the cost of the lighting system to be produced, thus reducing the number of "good” headlamps in mid / lower class vehicles. "The quality / strength of light has a direct impact on visibility and thus the risk of accidents all vehicles important.
  • the document DE 102 54 806 B4 shows a method for information processing of at least two information sources in a motor vehicle.
  • the present invention provides a method, furthermore a control unit which uses this method and finally a corresponding computer program product according to the main claims.
  • Advantageous embodiments emerge from the respective subclaims and the following description.
  • the present invention provides a method for adjusting a headlight range of a headlamp of a vehicle, the method comprising the steps of:
  • the present invention provides a control device for adjusting a headlight range of a headlamp of a vehicle, the control device having the following features:
  • a unit for changing the headlamp range of the headlamp in response to the signal being read a unit for changing the headlamp range of the headlamp in response to the signal being read.
  • the present invention provides a control device which is designed to carry out or implement the steps of the method according to the invention in corresponding devices. Also by this embodiment of the invention in the form of a control device, the object underlying the invention can be achieved quickly and efficiently.
  • a control device can be understood as meaning an electrical device which processes sensor signals and outputs control signals in dependence thereon.
  • the control unit may have an interface, which may be formed in hardware and / or software.
  • the interfaces can be part of a so-called system ASIC, for example, which contains various functions of the control unit.
  • the interfaces are their own integrated circuits or at least partially consist of discrete components.
  • the interfaces may be software modules that are available for example on a microcontroller in addition to other software modules.
  • Also of advantage is a computer program product with program code which can be stored on a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory and used to carry out the method according to one of the embodiments described above, if the program is stored on a computer or a computer. ner device is executed.
  • a machine-readable carrier such as a semiconductor memory, a hard disk memory or an optical memory
  • a pitch angle can be understood as an angle by which the vehicle is inclined further towards the roadway in the front area than in the rear area.
  • the signal can be obtained in different ways. For example, it is conceivable that the signal is provided using information representing a mass of the vehicle. Also, the signal may be obtained by evaluating data derived from a camera already installed as standard in a variety of vehicles.
  • a headlight range is to be understood as a width or limit line in front of the vehicle which delimits an area which is defined by the at least one vehicle
  • Headlamp is illuminated with a predefined brightness.
  • a reduction of the headlamp range can be understood by means of a reduction of the area illuminated in front of the vehicle or an enlargement of the area illuminated by the at least one headlamp.
  • the present invention is based on the recognition that an automatic
  • Adaptation of the headlight range on the basis of the signal, which represents the pitch angle of the vehicle very easy adjustment of the illumination of the area in front of the vehicle can be realized.
  • a static change in the pitch angle which is caused, for example, by a deflection of the vehicle in the rear region, is achieved with technically simple and often already with a vehicle in a vehicle. standardized sensor can be detected. In this way, an additional benefit can be drawn from an often already provided signal in order to realize a further safety functionality in the vehicle.
  • an image signal can be taken to mean measurement data that represents an environment of the vehicle that is detected at least two-dimensionally.
  • an embodiment of the present invention offers the advantage of additional use of a signal provided by the camera or sensor. In this way it can be avoided that further sensors are to be provided for determining the pitch angle of the vehicle, which would increase the manufacturing costs of such a system.
  • the step of providing the signal by using a result of an evaluation of the image signal from the camera or the image signal of the environment detecting sensor is provided, wherein an origin region of the image signal from which objects appear to spring with an expected origin range from which objects should originate at a known pitch angle of the vehicle is compared in a comparison to the signal to provide the basis of a result of the comparison and / or wherein a sink area of the image signal in which objects appear to disappear is compared with an expected sink area in which objects should disappear at a known pitch angle of the vehicle in another comparison the Si gnal on the basis of a result of the other comparison.
  • a region of origin can be understood as meaning a partial region of the camera image from which objects in the image appear to spring. This can be achieved, for example, by evaluating motion vectors of objects, the motion trajectories relating to a specific subarea of the image of the camera, namely the origin of the camera. rich, converging or pointing in this area. It can be exploited here that the movement trajectories point at different pitch angles, ie different angles at which the camera or the optical sensor looks at the surroundings in front of the vehicle and also in different subregions of the image.
  • the sensor detecting the surroundings of the vehicle can be, in addition to a forward-looking sensor (for example front camera, radar sensor, ultrasound, etc, Also a sensor which is for example directed backwards. In a backward sensor, no objects spring from the field-of-expansion, but appear to disappear in them (due to reversed direction of travel).
  • a detection of a topographical course of a roadway in front of the vehicle can be carried out, wherein the provision of the signal takes place in consideration of the topographic course.
  • a topographical course of the road ahead of the vehicle can be understood as a recognition of the course of the roadway over elevations or in depressions.
  • Such an embodiment of the present invention offers the advantage of a forward-looking control of the headlamp range, wherein, for example, the headlamp range can be increased if an incline in front of the vehicle has been detected from the topographical course of the roadway.
  • the step of providing the signal is provided on the basis of an estimated or measured mass of the vehicle or a mass of a load of the vehicle.
  • Such an embodiment of the present invention offers the advantage of multiple use of signals from often already installed in the vehicle sensors for determining the mass of the vehicle or a payload of the vehicle.
  • the signal can be determined in a particularly simple manner if, in the step of providing the signal, the signal is provided using a sensor signal of a displacement sensor on an axle of the vehicle.
  • a displacement sensor can be understood as meaning a sensor which detects the movement by a distance.
  • the use of a displacement sensor offers a robust and largely error-free determination of the pitch angle.
  • the signal in the step of providing, may be provided on the basis of the displacement sensor disposed on a rear axle of the vehicle.
  • Embodiment of the present invention has the advantage that at the rear axle, the movement of the vehicle in compression or rebounding are very large, on the one hand usually the payload is stowed in the rear of the vehicle and on the other hand at a pitching motion of the vehicle about the front axle on the rear axle, the change the distance is the largest, so that can be achieved with the use of a signal of the arranged at the rear axle displacement sensor very accurate results.
  • An engine control unit may be understood to mean a unit that outputs corresponding engine control signals in response to control signals input by a driver of the vehicle, for example, to adjust power, speed, torque, or similar parameters of the engine to the driver desired values.
  • Such an embodiment of the present invention offers the advantage of allowing additional use of values already available in the vehicle, in order to increase the driving safety of the vehicle through the multiple use of already available signals.
  • the present invention also in the step of providing the signal using information about a rotational speed of an engine of the vehicle, about a rotational speed of at least one wheel of the vehicle, on the wheel slip of at least one wheel, an acceleration, in particular of Vehicle, and / or via a be determined driving torque of the engine of the vehicle.
  • an acceleration, in particular of Vehicle and / or via a be determined driving torque of the engine of the vehicle.
  • the weight ratio can be used to calculate the load distribution.
  • Such an embodiment of the present invention offers the advantage of using signals from sensors often already installed in the vehicle and their evaluation, which are relevant for further vehicle safety functions. In this way, therefore, an additional benefit can be achieved very cost-effectively by using the signals from existing sensors.
  • 1A-C are schematic representations of a vehicle, in which the
  • Illumination is changed by different causes
  • Fig. 2 is a block diagram of a vehicle in which an embodiment of the present invention is used;
  • FIG. 3 shows a schematic representation of an evaluation of an image of the camera on a source region from which objects appear to spring
  • a system for headlamp leveling can be implemented in various design variants.
  • Such a static headlamp leveling is reproduced in the illustrations of Fig. 1A, wherein in the upper view of FIG. 1 A is shown as one Increasing the weight at the rear of the vehicle causes an increase in the beam range, so that a corresponding lowering of a light cone emitted by the headlights of the vehicle is carried out in order to dazzle no other road users (see the lower illustration of Fig. 1 A).
  • a dynamic LWR as shown in the two sub-figures of Fig.
  • Beam angle for light from the headlights should be selected according to the lower view of FIG. 1 B.
  • Headlamp range control as shown in the two subfigures of FIG. 1C, the headlamps of the vehicle are adjusted so that they (depending on the system design also anticipatory) make a topography balance, for. raise the cone of light in front of a dome.
  • the (preceding) roadway has a slope, so that the radiation angle of the light from the headlight should be set to a shallower in order to achieve a desired illumination even in a rising lane sufficiently ahead of the vehicle Luminous area to illuminate sufficiently.
  • a ride height sensor may be provided on an axle which provides a signal to be evaluated accordingly.
  • a ride height sensor may be provided on an axle which provides a signal to be evaluated accordingly.
  • dynamic / extended headlamp leveling at least two sensors are required.
  • a camera system such as that used for high-beam assistants, lane departure warning systems and traffic sign recognition, it is possible to anticipate the course of the road ahead. This is an extended
  • Lighting level control technically very easy to implement.
  • an evaluation of data of the engine management and / or driving data can be used to determine the pitch angle, which then no more height sensor is required for load balancing.
  • In vehicles with xenon light automatic headlight range control is mandatory. This is intended to compensate for the pitching of the vehicle.
  • the longitudinal acceleration of the vehicle and the position sensors on the front and rear axles are used to calculate the adjustment angle of the headlight range adjustment.
  • Fig. 2 shows a block diagram of a vehicle 200 in which an embodiment of the present invention is used.
  • the vehicle 200 has a camera 210 or more generally a look-ahead sensor, preferably an optical sensor or a radar sensor, which detects objects or scenery in a detection area 220 around the vehicle 200 and transmits it to a control unit 230, which controls the light emission the vehicle headlight 240 is formed.
  • the control unit 230 includes an interface 231 for reading in a signal representing a pitch angle of the vehicle 200 and a unit for changing a headlight range L of FIG
  • Headlamps 240 in response to the read signal.
  • the headlamps 240 are designed to illuminate an illumination area 242 in front of the vehicle up to a headlight range L to be set with a predetermined or variable light intensity.
  • the vehicle 200 has a tachometer 250 connected to the control unit 230 for detecting a rotational speed of a wheel 260, for example a front axle of the vehicle 200, a travel sensor 270 connected to the control unit 230 for measuring a compression travel with a load on the rear axle, one with the control unit 230 connected interface for reading in a torque output from the motor 280 of the vehicle and an acceleration sensor 290, which is designed to measure an acceleration and to transmit to the control unit 230 an information representing the acceleration.
  • a pitch rate sensor can be used to implement dynamic headlamp range control.
  • the pitch rate or the pitch angle may also be from or
  • the approach presented here should also simplify the determination of the pitch angle by payload.
  • the static headlamp leveling which compensates for the (static) pitch angle caused by the loading, can by Evaluation of the FOE (Focus Of Expansion) can be found in the image of the camera 210.
  • the FOE forms a portion 310 of the image 300 of the camera 210 as shown in FIG.
  • trajectories 320 of objects recognized in the image 300 appear to originate from the source region 310; this area of origin can thus be interpreted as a "vanishing point" in image 300. From it "grows" the image 300, ie from there all objects come from, since one drives in this direction.
  • This origin region 310 is also assigned a specific pitch angle of the vehicle 200. Now, if the vehicle 200 is loaded, it will usually spring in the rear of the vehicle, which changes the pitch angle. For example, the
  • Jib travel is known when the vehicle is empty. If the vehicle is now loaded, the compression travel on the rear axle changes.
  • the spring constant of the rear axle suspension can be used to calculate how much weight has been added to the rear axle.
  • the total payload is known.
  • the charged Vorderachslast is now known.
  • the Federkon- Stante at the front axle now the compression travel on the front axle can be determined.
  • the stationary pitch angle caused by the payload is thus also known through the evaluation of the compression travel of the vehicle on the rear axle.
  • a plausibility check of the pitch angle determined on the basis of a signal of the camera can take place.
  • Plausibility check of the pitch angle can be determined, for example, via a function of the mass estimation already implemented in the vehicle, whereby the vehicle weight is determined precisely within a tolerance range of approximately 5%.
  • an internal vehicle mass estimate is used to adjust, for example, the stabilizing brake interventions to the current vehicle weight. This means that in a fully loaded vehicle stronger interventions for stabilization are necessary than in a vehicle with curb weight.
  • the driving force retrieved by the motor 280 is correlated with the actually existing acceleration (for example from a signal of the acceleration sensor 290).
  • the estimation of the characteristic speed (for example from information of the rotational speed sensor 250 on the wheel 260) can also be used to deduce the vehicle mass. By means of the known empty weight thus the payload can be calculated. This can be further improved by a seat occupancy detection in order to obtain a higher estimation accuracy. In this case is detected by means not shown in Fig. 2 sensors on soft seats are vehicle occupants and possibly what weight these vehicle occupants have. From the engine speed, wheel speed and / or other power measurements then the load of the vehicle and / or the slope on which a vehicle is located, can be calculated. About the calculation of the adhesion of the wheels or the calculation of the wheel slip and / or coefficient of friction, the load of the wheel can be determined.
  • the method 400 includes a step of providing
  • Plausibil signal that represents the pitch angle.
  • an embodiment can be supplemented by features of another embodiment.
  • method steps according to the invention can be repeated as well as carried out in a sequence other than that described.
  • an exemplary embodiment comprises a "and / or" link between a first feature and a second feature, then this is to be read so that the embodiment according to one embodiment is both the first feature as well as the second feature and according to another embodiment, either only the first feature or only the second feature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

Procédé (400) pour régler la hauteur de faisceau (L) d'un phare (240) de véhicule (200). Ledit procédé (400) comprend une étape consistant à fournir (410) un signal représentant un angle de tangage du véhicule (200), et une étape consistant à modifier (420) la hauteur de faisceau (L) du phare (240) en fonction du signal fourni.
EP12729148.2A 2011-08-23 2012-06-25 Procédé, appareil de commande et produit-programme informatique pour régler la hauteur de faisceau d'un phare de véhicule Withdrawn EP2748033A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011081395A DE102011081395A1 (de) 2011-08-23 2011-08-23 Verfahren und Steuergerät zur Einstellung einer Leuchtweite eines Scheinwerfers eines Fahrzeugs
PCT/EP2012/062208 WO2013026596A1 (fr) 2011-08-23 2012-06-25 Procédé, appareil de commande et produit-programme informatique pour régler la hauteur de faisceau d'un phare de véhicule

Publications (1)

Publication Number Publication Date
EP2748033A1 true EP2748033A1 (fr) 2014-07-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12729148.2A Withdrawn EP2748033A1 (fr) 2011-08-23 2012-06-25 Procédé, appareil de commande et produit-programme informatique pour régler la hauteur de faisceau d'un phare de véhicule

Country Status (5)

Country Link
US (1) US20140301094A1 (fr)
EP (1) EP2748033A1 (fr)
CN (1) CN103764445A (fr)
DE (1) DE102011081395A1 (fr)
WO (1) WO2013026596A1 (fr)

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