CN113207206B - Vehicle light control method and device and vehicle - Google Patents
Vehicle light control method and device and vehicle Download PDFInfo
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- CN113207206B CN113207206B CN202110326026.5A CN202110326026A CN113207206B CN 113207206 B CN113207206 B CN 113207206B CN 202110326026 A CN202110326026 A CN 202110326026A CN 113207206 B CN113207206 B CN 113207206B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
- H05B45/12—Controlling the intensity of the light using optical feedback
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The application discloses a light control method and device of a vehicle and the vehicle, and the method comprises the following steps: determining a illuminance distribution curve of each light source monomer on a reference plane under different duty ratios by using the illuminance model of each light source monomer; detecting the current environment brightness of the driving environment of the vehicle, and determining a first illuminance demand curve according to the current environment brightness; when a target object in front of the vehicle is identified, calculating a light illumination requirement based on the area where the target object is located; mapping the illuminance requirement and the illuminance requirements of other areas in front of the vehicle obtained based on the first illuminance requirement curve to a reference plane to obtain a second illuminance requirement curve on the reference plane; and controlling the irradiation angle and/or the irradiation brightness of each light source monomer according to the second illuminance requirement curve. Therefore, the problem that the illuminance cannot be accurately controlled according to the illuminance requirement of the target area in the related art is solved, the accurate control of the illuminance is guaranteed, and the light experience of a driver is greatly improved.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a light control method and device of a vehicle and the vehicle.
Background
At present, a matrix intelligent headlamp system (ADB) is configured in a high-end vehicle model, and an intelligent headlamp can perform intelligent light control according to external environment brightness and the conditions of road traffic participants, for example, automatically turn on and off a high Beam according to the lighting conditions at night and in the daytime; when the meeting condition is identified, an LED (Light-Emitting Diode) Light source and the like in the relevant area are automatically turned off.
However, the control method cannot accurately control the illuminance according to the illuminance requirement of the target area, and cannot meet the lighting requirement of the driver while ensuring the anti-glare purpose, and thus needs to be solved urgently.
Content of application
The application provides a light control method and device of a vehicle and the vehicle, so that the problem that in the related art, the illuminance cannot be accurately controlled according to the illuminance requirement of a target area and the lighting requirement of a driver cannot be met while the anti-dazzle purpose is guaranteed is solved, the accurate control of the illuminance is guaranteed, and the light experience of the driver is greatly improved.
An embodiment of a first aspect of the present application provides a light control method for a vehicle, including the following steps:
determining a illuminance distribution curve of each light source monomer under different duty ratios on a reference plane by using an illuminance model of each light source monomer;
detecting the current environment brightness of a vehicle driving environment, and determining a first illuminance demand curve according to the current environment brightness;
upon identifying an object in front of a vehicle, calculating a light illumination requirement based on a region where the object is located;
mapping the illuminance requirement and the illuminance requirements of other areas in front of the vehicle obtained based on the first illuminance requirement curve to the reference plane to obtain a second illuminance requirement curve on the reference plane; and
and controlling the irradiation angle and/or the irradiation brightness of each light source monomer according to the second illuminance requirement curve.
Optionally, the light control method of the vehicle further includes:
establishing a rectangular coordinate system by taking the direction of the head of the vehicle as the longitudinal direction and the direction of the axle of the vehicle as the transverse direction, and determining the reference plane by using a vertical plane at a preset distance from the headlamp of the vehicle;
and modeling the light source illuminance of each light source monomer based on the reference plane, and generating an illuminance model of each light source monomer.
Optionally, the illuminance requirement curve is obtained from requirement values at different azimuth angles.
Optionally, the controlling the irradiation angle and/or the irradiation brightness of each light source unit according to the second illuminance requirement curve includes:
dispersing the second illuminance requirement curve to obtain a discrete reference point requirement value;
and determining the optimal duty ratio of each light source monomer by using the illumination model of each light source monomer.
Optionally, the determining the optimal duty cycle of each light source unit by using the illuminance model of each light source unit includes:
looking up a table of illuminance models by using each light source monomer as a target and using a preset step length to obtain illuminance model values of all reference points;
and searching the optimal duty ratio of each light source monomer according to the minimum variance sum between the illuminance requirement and the illuminance model value in the second illuminance requirement curve as an optimization target.
The second aspect embodiment of the present application provides a light control device for a vehicle, including:
the first determination module is used for determining a illuminance distribution curve of each light source monomer under different duty ratios on a reference plane by using the illuminance model of each light source monomer;
the second determination module is used for detecting the current environment brightness of the driving environment of the vehicle and determining a first illuminance demand curve according to the current environment brightness;
the calculation module is used for calculating the illumination requirement based on the area of an object in front of the vehicle when the object is identified;
an obtaining module, configured to map the illuminance requirement and illuminance requirements of other areas in front of the vehicle obtained based on the first illuminance requirement curve to the reference plane to obtain a second illuminance requirement curve on the reference plane; and
and the control module is used for controlling the irradiation angle and/or the irradiation brightness of each light source monomer according to the second illuminance requirement curve.
Optionally, the light control device of the vehicle further includes:
the third determining module is used for establishing a rectangular coordinate system by taking the direction of the head of the vehicle as the longitudinal direction and the direction of the axle of the vehicle as the transverse direction, and determining the reference plane by using a vertical plane at a preset distance away from the headlamp of the vehicle;
the generating module is used for modeling the light source illuminance of each light source monomer based on the reference plane and generating an illuminance model of each light source monomer;
wherein, the illuminance requirement curve is obtained by the requirement values under different azimuth angles.
Optionally, the control module includes:
the acquisition unit is used for dispersing the second illuminance demand curve to obtain a discrete reference point demand value;
and the determining unit is used for determining the optimal duty ratio of each light source unit by using the illumination model of each light source unit.
Optionally, the determining unit includes:
looking up a table of illuminance models by using each light source monomer as a target and using a preset step length to obtain illuminance model values of all reference points;
and searching the optimal duty ratio of each light source monomer according to the minimum variance sum between the illuminance requirement and the illuminance model value in the second illuminance requirement curve as an optimization target.
An embodiment of a third aspect of the application provides a vehicle, which comprises the light control device of the vehicle.
Therefore, the illuminance distribution curve of each light source monomer on the reference plane under different duty ratios can be determined by using the illuminance model of each light source monomer, the current environment brightness of the driving environment of the vehicle is detected, the first illuminance requirement curve is determined according to the current environment brightness, when the target object in front of the vehicle is identified, the illuminance requirement is calculated based on the region where the target object is located, the illuminance requirement and the illuminance requirements of other regions in front of the vehicle obtained based on the first illuminance requirement curve are both mapped to the reference plane to obtain the second illuminance requirement curve on the reference plane, the irradiation angle and/or the irradiation brightness of each light source monomer are controlled according to the second illuminance requirement curve, the problems that in the related technology, the illuminance cannot be accurately controlled according to the illuminance requirement of the target region, and the anti-dazzle purpose cannot be guaranteed are solved, the problem of the lighting demand of satisfying the driver has guaranteed the accurate control of illuminance, promotes driver's light greatly and experiences.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a light control method for a vehicle according to an embodiment of the present application;
fig. 2 is an exemplary diagram of an arrangement of LED light sources of a high beam module according to an embodiment of the present application;
FIG. 3 is a graph illustrating a reference plane base illuminance demand curve according to one embodiment of the present application;
FIG. 4 is a schematic diagram illustrating the calculation of the mapping of target area illumination requirements onto a reference plane on different distance vertical planes according to one embodiment of the present application;
FIG. 5 is a flow chart of a light control method of a vehicle according to one embodiment of the present application;
FIG. 6 is a block diagram of an exemplary light control device for a vehicle according to an embodiment of the present application;
FIG. 7 is a block diagram illustration of a vehicle according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
The following describes a light control method and device for a vehicle and the vehicle according to an embodiment of the present application with reference to the drawings. In order to solve the problems that the illuminance requirement of a target area cannot be accurately controlled according to the illuminance requirement of the target area and the lighting requirement of a driver cannot be met while the anti-glare purpose is ensured in the related art mentioned in the above background technology center, the present application provides a vehicle lighting control method, in which a illuminance distribution curve of each light source unit at different duty ratios on a reference plane can be determined by using a model of the illuminance of each light source unit, the current ambient brightness of a vehicle driving environment is detected, a first illuminance requirement curve is determined according to the current ambient brightness, when an object in front of the vehicle is identified, the illuminance requirement of the target is calculated based on the area where the object is located, and the illuminance requirement of the illuminance and the illuminance requirements of other areas in front of the vehicle obtained based on the first illuminance requirement curve are both mapped to the reference plane, the second illuminance requirement curve on the reference plane is obtained, the irradiation angle and/or the irradiation brightness of each light source monomer are controlled according to the second illuminance requirement curve, the problem that in the related art, the illuminance cannot be accurately controlled according to the target area illuminance requirement, the anti-dazzle purpose cannot be guaranteed, the lighting requirement of a driver can be met is solved, the accurate control of the illuminance is guaranteed, and the lighting experience of the driver is greatly improved.
Specifically, fig. 1 is a schematic flowchart of a light control method of a vehicle according to an embodiment of the present disclosure.
As shown in fig. 1, the light control method of the vehicle includes the steps of:
in step S101, a light intensity distribution curve of each light source unit at different duty ratios on a reference plane is determined by using a light intensity model of each light source unit.
It can be understood that the intelligent headlamp system of the vehicle generally comprises an ambient brightness sensor, a camera, a left matrix type high beam lamp module, a right matrix type high beam lamp module and a controller. Wherein, ambient brightness sensor is used for detecting the outside illuminance of vehicle, and the camera is used for discerning other road participants, and the high beam module comprises a plurality of LED light sources, and the controller can be to every LED light source independent control.
Specifically, the light source unit may be an LED light source, as shown in fig. 2, and fig. 2 is a schematic view of an arrangement of LED light sources of the high beam module, so that in the embodiment of the present application, a illuminance model may be established for illuminance of each single LED light source, so as to determine illuminance distribution curves of driving signals of different duty ratios of each LED light source on a reference plane.
In step S102, a current ambient brightness of a driving environment of the vehicle is detected, and a first illuminance requirement curve is determined according to the current ambient brightness.
It can be understood that, in the embodiment of the present application, the current ambient brightness of the driving environment of the vehicle may be detected by the ambient brightness sensor, so as to plan a default illuminance requirement curve on the reference surface according to different external ambient brightness, as shown in table 1 and fig. 3, where table 1 is a reference surface base illuminance requirement table, and fig. 3 is a reference plane base illuminance requirement curve diagram.
TABLE 1
In step S103, when an object in front of the vehicle is recognized, the illuminance demand is calculated based on the area where the object is located.
The target object may include, but is not limited to: vehicles, bicycles, motorcycles, pedestrians, traffic signs, and the like.
It can be understood that, this application embodiment can be by effective object of camera discernment, when discerning vehicle, bicycle, motorcycle, pedestrian and traffic sign, for preventing that the high beam from causing dazzling or traffic sign reflection high beam to cause dazzling to this driver to target driver, reduces the regional illuminance at target object place to suitable luminance value, also can satisfy this driver's lighting requirements as far as possible under the prerequisite of guaranteeing to prevent dazzling. Table 2 defines anti-glare brightness requirement values for various types of targets, and for vehicle targetsIs defined as L V The requirement for anti-glare brightness of an automobile, motorcycle or pedestrian is defined as L P The demand for anti-glare brightness of traffic signs is defined as L S 。
TABLE 2
| Type of object | Glare prevention brightness requirement/lx |
| Vehicle with a steering wheel | L V |
| Bicycle/motorcycle/pedestrian | L P |
| Traffic sign | L S |
Note that L in Table 3 V 、L P 、L S The specific value of (2) needs to be calibrated and determined according to actual conditions, and is not specifically limited herein.
In step S104, the illuminance demand and the illuminance demand of the other area in front of the vehicle obtained based on the first illuminance demand curve are both mapped to the reference plane, and a second illuminance demand curve on the reference plane is obtained.
Optionally, in some embodiments, the illuminance demand curve is derived from demand values at different azimuth angles.
Specifically, the embodiment of the present application may first determine the left boundary azimuth angle α, the right boundary azimuth angle β, and the longitudinal distance d of the area where the target object is located t ；
Then, the brightness requirement l of the area where the target object is located is determined according to the type of the target object t ；
Finally, the brightness value l mapped to the reference surface is calculated r The formula is as follows:
wherein dr is the relative longitudinal distance of the reference plane.
Thus, with reference to FIG. 4, FIG. 4 is a schematic diagram illustrating the mapping of the illumination requirement of the target area to the reference plane on different distance vertical planes, where d is t1 Is the relative longitudinal distance of the target area 1, d t2 Is the relative longitudinal distance of the target area 2, d r Is the relative longitudinal distance of the reference plane, α 1 Is the left boundary azimuth angle alpha of the target region 1 2 Is the left boundary azimuth angle position, beta, of the target region 2 1 Is the right boundary azimuth angle position, beta, of the target area 1 2 Is the right boundary azimuth position, I, of the target area 2 t1 Is a target area, I r1 For mapping to reference region illumination requirement values, I r2 For mapping to the reference area illumination demand value.
Specifically, the embodiment of the present application may map the illuminance requirement and the illuminance requirements of other areas in front of the vehicle obtained based on the first illuminance requirement curve to the reference plane through the following mapping formula, so as to obtain a second illuminance requirement curve on the reference plane:
I r1 ＝I t1 *d r 2 /d t1 2 。
in step S105, the illumination angle and/or illumination brightness of each light source unit is controlled according to the second illuminance requirement curve.
Optionally, in some embodiments, controlling the illumination angle and/or illumination brightness of each light source unit according to the second illuminance requirement curve includes: dispersing the second illuminance requirement curve to obtain a discrete reference point requirement value; and determining the optimal duty ratio of each light source monomer by using the illumination model of each light source monomer.
Optionally, in some embodiments, determining the optimal duty cycle of each light source unit by using the illuminance model of each light source unit includes: looking up a table illumination model by using each light source monomer as a target and using a preset step length to obtain illumination model values of all reference points; and searching the optimal duty ratio of each light source monomer according to the minimum variance sum between the illuminance requirement and the illuminance model value in the second illuminance requirement curve as an optimization target.
It can be understood that, in the embodiment of the present application, the illuminance requirement on the reference surface may be discretized every 1 degree, the discrete points are used as reference points and the illuminance requirement value of each discrete point is obtained, the duty cycle of the LED light source is optimized by using the minimum variance as an optimization target based on the illuminance model of each LED light source and according to the illuminance superposition principle, so as to obtain the optimal LED light source duty cycle driving signal, and the specific optimization calculation is as follows:
(1) in order to reduce the complexity of optimization calculation, a high beam area is divided into 8 areas of left 1, left 2, left 3, left 4 and right 1, right 2, right 3 and right 4, and on the basis, a reference plane illuminance demand curve is also divided into 8 sections of curves;
(2) according to the light shape of each LED light source, each LED light source is mapped to corresponding 8 areas, as shown in Table 3, and Table 3 is a mapping table of the LED light sources with high beam division.
TABLE 3
| Region(s) | LED light source |
| Left 1 | LED L1 、LED L2 、LED R1 |
| Left 2 | LED L3 、LED L4 、LED R2 |
| … | … |
(3) Optimizing calculation is carried out on the illuminance requirement in each high beam subarea respectively to obtain the optimal duty ratio signal of the LED light source in the area, taking the left area 1 as an example, the specific calculation is as follows:
the demand curve in the left 1 region discretizes m reference points.
② determining the illuminance requirement value L1 of each reference point des 、L2 des 、Lm des 。
Looking up a table in an interval of 0-100% by taking delta as duty ratio step length according to an LED light source illuminance model to obtain a light source LED L1 、LED L2 And an LED R1 Illuminance L1 at left 1 region 1, 2, 3, …, m discrete reference point LedL1 、L1 LedL2 、L1 LedR1 、…Lm LedL1 、Lm LedL2 、Lm LedR1 。
Fourthly, calculating the illuminance value of each discrete reference point model according to the illuminance superposition principle:
L1 mdl ＝L1 LedL1 +L1 LedL2 +L1 LedR1 ；
L2 mdl ＝L2 LedL1 +L2 LedL2 +L2 LedR1 ；
……
Lm mdl ＝Lm LedL1 +Lm LedL2 +Lm LedR1 。
light source LED L1 、LED L2 And an LED R1 The duty ratio signals are optimized by taking a fixed value delta as a step length, and the reference point illuminance variance and sigma are calculated 2 Where σ is 2 The calculation formula is as follows:
σ 2 ＝((L1 des -L1 mdl ) 2 +(L2 des –L2 mdl ) 2 +(L3 des -L3 mdl ) 2 +…+(Lm des –Lm mdl ) 2 )/n；
when sigma is 2 When the minimum value is reached, the optimum duty ratio value d is determined L1_opt 、d L2_opt And d R1_opt Is the optimum value.
Therefore, the duty ratio signals of the LED light sources which are optimally determined are used as final control signals to drive the brightness of the LED light sources.
Optionally, in some embodiments, the light control method of the vehicle further includes: establishing a rectangular coordinate system by taking the direction of the head of the vehicle as the longitudinal direction and the direction of the axle of the vehicle as the transverse direction, and determining a reference plane by using a vertical plane at a preset distance from the headlamp of the vehicle; and modeling the light source illuminance of each light source monomer based on the reference plane to generate an illuminance model of each light source monomer.
It can be understood that, in the embodiments of the present application, a rectangular coordinate system may be established with the vehicle head direction as the longitudinal direction and the vehicle axle direction as the transverse direction, and the distance d is used r The vertical plane of (a) serves as a reference plane on which the illuminance of each individual LED light source is modeled.
Specifically, with the driving duty ratio of the LED light source and the azimuth angle of the horizontal plane as variables, experimental tests are performed to obtain the illuminance distribution of each single LED light source on the reference plane under different driving duty ratios, as shown in table 4, where table 4 is an intention of indicating the illuminance distribution on a reference plane of a certain single LED light source.
TABLE 4
In order to further understand the light control method of the vehicle according to the embodiment of the present application, the following description is made in detail with reference to fig. 5.
As shown in fig. 5, the light control method of the vehicle includes the steps of:
s501, a rectangular coordinate system and a high beam reference plane are established, a illuminance model is established for each single LED light source, and illuminance partial curves of each LED light source under different duty ratio driving signals on the reference plane are determined.
And S502, according to the brightness of the external environment of the vehicle, a basic illuminance demand curve (demand values under different azimuth angles) is planned on a reference plane.
S503, when the effective target object is identified, in order to meet the requirements of anti-glare and driver illumination, a proper illumination requirement is planned in the area where the target object is located.
And S504, mapping all the illuminance requirements of different areas to a reference plane to obtain an illuminance requirement curve on the reference plane.
And S505, dispersing the demand curve on the reference surface to obtain a discrete reference point demand value, looking up a table illumination model by taking a single LED light source as an object and delta as a fixed step length, calculating illumination model values of all reference points according to a brightness superposition principle, and searching for an optimal LED light source duty ratio combination by taking the minimum variance sum of the reference point illumination demand and the illumination model values as an optimization target.
And S506, controlling the brightness of the LED light source by using the optimized duty ratio signal.
According to the light control method for the vehicle, provided by the embodiment of the application, the light distribution curve of each light source monomer under different duty ratios on the reference plane can be determined by using the light intensity model of each light source monomer, the current environment brightness of the driving environment of the vehicle is detected, the first light intensity requirement curve is determined according to the current environment brightness, when the target object in front of the vehicle is identified, the light intensity requirement is calculated based on the area where the target object is located, the light intensity requirement and the light intensity requirements of other areas in front of the vehicle obtained based on the first light intensity requirement curve are both mapped to the reference plane to obtain the second light intensity requirement curve on the reference plane, the irradiation angle and/or the irradiation brightness of each light source monomer are controlled according to the second light intensity requirement curve, and the problem that the precise control of the light intensity cannot be performed according to the light intensity requirement of the target area in the related technology is solved, and the problem of meeting the lighting requirement of a driver can not be solved while the anti-dazzle purpose is ensured, the accurate control of the illuminance is ensured, and the light experience of the driver is greatly improved.
Next, a light control device for a vehicle according to an embodiment of the present application will be described with reference to the drawings.
Fig. 6 is a block diagram schematically illustrating a light control apparatus of a vehicle according to an embodiment of the present application.
As shown in fig. 6, the light control device 10 of the vehicle includes: a first determination module 100, a second determination module 200, a calculation module 300, an acquisition module 400, and a control module 500.
The first determining module 100 is configured to determine, by using the illuminance model of each light source unit, an illuminance distribution curve of each light source unit on a reference plane at different duty ratios;
the second determining module 200 is configured to detect a current ambient brightness of a driving environment of the vehicle, and determine a first illuminance demand curve according to the current ambient brightness;
the calculation module 300 is used for calculating the illuminance requirement based on the area where the target object is located when the target object in front of the vehicle is identified;
the obtaining module 400 is configured to map the illuminance requirement and the illuminance requirements of other areas in front of the vehicle, which are obtained based on the first illuminance requirement curve, to a reference plane to obtain a second illuminance requirement curve on the reference plane; and
the control module 500 is configured to control the illumination angle and/or illumination brightness of each light source unit according to the second illuminance requirement curve.
Optionally, the light control device 10 of the vehicle further includes:
the third determining module is used for establishing a rectangular coordinate system by taking the direction of the head of the vehicle as the longitudinal direction and the direction of the axle of the vehicle as the transverse direction, and determining a reference plane by using a vertical plane at a preset distance from the headlamp of the vehicle;
the generating module is used for modeling the light source illuminance of each light source monomer based on the reference plane and generating an illuminance model of each light source monomer;
wherein, the illuminance requirement curve is obtained by the requirement values under different azimuth angles.
Optionally, the control module 500 comprises:
the acquisition unit is used for dispersing the second illuminance demand curve to obtain a discrete reference point demand value;
and the determining unit is used for determining the optimal duty ratio of each light source monomer by using the illumination model of each light source monomer.
Optionally, the determining unit includes:
looking up a table illumination model by using each light source monomer as a target and using a preset step length to obtain illumination model values of all reference points;
and searching the optimal duty ratio of each light source monomer according to the minimum variance sum between the illuminance requirement and the illuminance model value in the second illuminance requirement curve as an optimization target.
It should be noted that the foregoing explanation of the embodiment of the vehicle light control method is also applicable to the vehicle light control device of this embodiment, and is not repeated herein.
According to the light control device of the vehicle provided by the embodiment of the application, the light intensity distribution curve of each light source monomer under different duty ratios on the reference plane can be determined by using the light intensity model of each light source monomer, the current environment brightness of the driving environment of the vehicle is detected, the first light intensity requirement curve is determined according to the current environment brightness, when the target object in front of the vehicle is identified, the light intensity requirement is calculated based on the area where the target object is located, the light intensity requirement and the light intensity requirements of other areas in front of the vehicle obtained based on the first light intensity requirement curve are both mapped to the reference plane to obtain the second light intensity requirement curve on the reference plane, the irradiation angle and/or the irradiation brightness of each light source monomer are controlled according to the second light intensity requirement curve, and the problem that the precise control of the light intensity cannot be performed according to the light intensity requirement of the target area in the related technology is solved, and the problem of meeting the lighting requirement of a driver can not be solved while the anti-dazzle purpose is ensured, the accurate control of the illuminance is ensured, and the light experience of the driver is greatly improved.
In addition, as shown in fig. 7, the embodiment of the present application also proposes a vehicle 20, where the vehicle 20 includes the light control device 10 of the vehicle.
According to the vehicle of this application embodiment, through the light controlling means of foretell vehicle, can't carry out the accurate control of illuminance according to the regional illuminance demand of target among the correlation technique to can't satisfy driver's lighting demand's problem when guaranteeing anti-dazzle purpose, guaranteed the accurate control of illuminance, promote driver's light greatly and experience.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or N embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "N" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more N executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of implementing the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
Claims (10)
1. A light control method of a vehicle, characterized by comprising the steps of:
determining a illuminance distribution curve of each light source monomer under different duty ratios on a reference plane by using an illuminance model of each light source monomer;
detecting the current environment brightness of a vehicle driving environment, and determining a first illuminance demand curve according to the current environment brightness;
upon identifying an object in front of a vehicle, calculating a light illumination requirement based on a region where the object is located;
mapping the illuminance requirement and the illuminance requirements of other areas in front of the vehicle obtained based on the first illuminance requirement curve to the reference plane to obtain a second illuminance requirement curve on the reference plane; and
and controlling the irradiation angle and/or the irradiation brightness of each light source monomer according to the second illuminance requirement curve.
2. The method of claim 1, further comprising:
establishing a rectangular coordinate system by taking the direction of the head of the vehicle as the longitudinal direction and the direction of the axle of the vehicle as the transverse direction, and determining the reference plane by using a vertical plane at a preset distance from the headlamp of the vehicle;
and modeling the light source illuminance of each light source monomer based on the reference plane, and generating an illuminance model of each light source monomer.
3. The method of claim 1 wherein the illuminance demand curve is derived from demand values at different azimuthal angles.
4. The method according to claim 2, wherein the controlling the illumination angle and/or illumination brightness of each light source unit according to the second illuminance requirement curve comprises:
dispersing the second illuminance requirement curve to obtain a discrete reference point requirement value;
and determining the optimal duty ratio of each light source monomer by using the illumination model of each light source monomer.
5. The method of claim 4, wherein the determining the optimal duty cycle of each light source cell using the model of the illuminance of each light source cell comprises:
looking up a table of illuminance models by using each light source monomer as a target and using a preset step length to obtain illuminance model values of all reference points;
and searching the optimal duty ratio of each light source monomer according to the minimum variance sum between the illuminance requirement and the illuminance model value in the second illuminance requirement curve as an optimization target.
6. A light control device of a vehicle, characterized by comprising:
the first determination module is used for determining a illuminance distribution curve of each light source monomer under different duty ratios on a reference plane by using the illuminance model of each light source monomer;
the second determination module is used for detecting the current environment brightness of the driving environment of the vehicle and determining a first illuminance demand curve according to the current environment brightness;
the calculation module is used for calculating the illumination requirement based on the area of an object in front of the vehicle when the object is identified;
an obtaining module, configured to map the illuminance requirement and illuminance requirements of other areas in front of the vehicle obtained based on the first illuminance requirement curve to the reference plane to obtain a second illuminance requirement curve on the reference plane; and
and the control module is used for controlling the irradiation angle and/or the irradiation brightness of each light source monomer according to the second illuminance requirement curve.
7. The apparatus of claim 6, further comprising:
the third determining module is used for establishing a rectangular coordinate system by taking the direction of the head of the vehicle as the longitudinal direction and the direction of the axle of the vehicle as the transverse direction, and determining the reference plane by using a vertical plane at a preset distance away from the headlamp of the vehicle;
the generating module is used for modeling the light source illumination of each light source monomer based on the reference plane and generating an illumination model of each light source monomer;
wherein, the illuminance requirement curve is obtained by the requirement values under different azimuth angles.
8. The apparatus of claim 7, wherein the control module comprises:
the acquisition unit is used for dispersing the second illuminance demand curve to obtain a discrete reference point demand value;
and the determining unit is used for determining the optimal duty ratio of each light source unit by using the illumination model of each light source unit.
9. The apparatus of claim 8, wherein the determining unit comprises:
looking up a table of illuminance models by using each light source monomer as a target and using a preset step length to obtain illuminance model values of all reference points;
and searching the optimal duty ratio of each light source monomer according to the minimum variance sum between the illuminance requirement and the illuminance model value in the second illuminance requirement curve as an optimization target.
10. A vehicle, characterized by comprising: a light control device of a vehicle according to any one of claims 6 to 9.
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| CN116872830B (en) * | 2023-09-05 | 2023-11-14 | 泰兴市新永诚车灯塑件有限公司 | Intelligent regulation and control method for automobile lamp |
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