CN113799685B - Adaptive adjustment method and device for brightness and light zone of ADB headlamp - Google Patents
Adaptive adjustment method and device for brightness and light zone of ADB headlamp Download PDFInfo
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- 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
- B60Q1/085—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 special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers
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- 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
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- 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
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- 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
- B60Q2300/31—Atmospheric conditions
- B60Q2300/314—Ambient light
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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
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- 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
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Abstract
The invention discloses an adaptive adjustment method and device for brightness and a light zone of an ADB headlamp, and belongs to the technical field of automobile electronic control. When the ADB is activated, the ADB headlamp brightness and light area self-adaptive adjusting method firstly lights the central light area and then sequentially lights other light areas to the two sides, so that the illumination intensity is basically consistent after each subarea is superposed with ambient light; if a certain light zone is in a closed state, the light zone is skipped, the next light zone in an open state is lightened, and adaptive adjustment of brightness under different ambient lights is performed, so that the problem of inconsistent illumination after ADB light is superposed with different ambient lights can be effectively solved. In addition, the ADB headlamp brightness and light area adaptive adjusting device also provides a judgment condition for ADB activation and exit, and can effectively solve the problems that the high beam is suddenly turned on or off and the brightness is suddenly changed.
Description
Technical Field
The invention belongs to the technical field of automobile electronic control, and particularly relates to an adaptive adjustment method and device for brightness and light zone of an ADB headlamp.
Background
More and more SUV motorcycle types and partial high-end cars begin to be configured with an ADB (matrix type) headlamp system, and as the upgrade of the traditional vehicle headlamp, the ADB headlamp improves the convenience of users and the technological sense of vehicles. The current ADB headlight can automatically turn on and off the light area according to the information of the obstacle.
However, a vehicle equipped with an ADB headlamp has two problems: (1) Aiming at different ambient light, the brightness of the light irradiated by the ADB is consistent, and after the ambient light is superposed, the illuminance sensed under different scenes is inconsistent; (2) There are cases where the high beam is suddenly turned on or off and the brightness suddenly changes.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an ADB headlamp brightness and light area self-adaptive adjusting method and device, which are used for solving the problem that the illuminance is inconsistent after ADB light is superposed with different ambient light.
In order to achieve the purpose, the invention provides an adaptive adjustment method for brightness and light zone of an ADB headlamp, which comprises the following steps:
the partitions of the ADB headlamp sequentially comprise … … L2', L1L2, L1', OL1, O ', OR1, R1', R1R2 and R2' … … from left to right; wherein: … … L2, L1, O, R and R2 … … are light regions of the ADB headlamp in sequence, … … L1L2, OL1, OR1 and R1R2 … … are overlapping regions between two adjacent light regions of the ADB headlamp in sequence, and … … L2', L1', O ', R1' and R2' … … are residual regions of the light regions of the ADB headlamp except the overlapping regions;
in a darkroom, acquiring a light intensity distribution diagram of each light area of the ADB headlamp, and determining an illumination curve of each light area according to the light intensity distribution diagram;
when the ADB is activated, the central light area is lightened firstly, and then other light areas are lightened sequentially towards two sides, so that the illumination intensity is basically consistent after each subarea is superposed with the ambient light; if a certain light zone is in a closed state, skipping the light zone, and lightening the next light zone in an open state;
the method comprises the following specific steps:
s1, when ADB is activated, firstly judging whether a central light area O is opened or not; if the light area O is opened, calculating to obtain a current PWM value of the light area O by combining the illuminance of the ambient light, the preset target illuminance and the illuminance curve of the light area O, so that the illuminance of the subarea O' reaches the target illuminance; if the optical area O is closed, executing the step S4;
s2, judging whether an adjacent light area L1 on the left side of the light area O is opened or not; if the light area L1 is opened, calculating to obtain a current PWM value of the light area L1 by combining the illuminance of the ambient light, the preset target illuminance, the illuminance provided by the light area O to the subarea OL1 and an illuminance curve of the light area L1, so that the illuminance of the subarea OL1 reaches the target illuminance; if the light area L1 is turned off, step S4 is executed;
s3, then judging whether an adjacent light area L2 on the left side of the light area L1 is opened or not; if the light area L2 is opened, calculating a current PWM value of the light area L2 by the same method as that when the light area L1 is opened, so that the illumination of the subarea L1L2 reaches the target illumination; by analogy, continuously judging the adjacent light area on the left side until all the light areas on the left side are calculated; if the light zone L2 is turned off, step S4 is executed;
s4, if a certain light area is closed, judging whether an adjacent light area on the left side of the light area is opened or not; if the adjacent light area on the left side of the light area is opened, calculating the current PWM value of the adjacent light area on the left side of the light area by the same method as that when the light area O is opened; if the adjacent light zone on the left side of the light zone is closed, executing step S4;
the control method of the right light area is consistent with that of the left light area.
Further, determining the illuminance profile of a single light zone comprises:
let the central light intensity of the light zone be Y 0 Light intensity at point A at the edge of the light area is Y A Light intensity at the center of the edge of the optical region is Y A/2 And fitting an illuminance quadratic curve of a single light zone according to the center, the center division point, the edge position and the corresponding light intensity of the light zone:
Y＝2(Y A +Y 0 -2Y A/2 )/A 2 *X 2 +(4Y A/2 -3Y 0 -Y A )/A*X+Y 0 ，X∈(-A，A)。
further, the calculating, by combining the illuminance of the ambient light, the preset target illuminance and the illuminance curve of the optical area O, a current PWM value of the optical area O, so that the illuminance of the partition O' reaches the target illuminance, includes:
subtracting the illumination of the ambient light from the preset target illumination to obtain the required illumination;
adjusting the current PWM value of the optical area O to enable the average value of the illumination of the subarea O 'or the illumination of a certain point in the subarea O' to reach the required illumination; at this time, the current PWM value of the optical area O is the current PWM value of the optical area O.
Further, calculating a current PWM value of the light zone L1 by combining the illuminance of the ambient light, the preset target illuminance, the illuminance provided by the light zone O to the sub-zone OL1, and the illuminance curve of the light zone L1, so that the illuminance of the sub-zone OL1 reaches the target illuminance includes:
subtracting the illuminance of the ambient light from a preset target illuminance, and subtracting the illuminance provided by the light area O to the subarea OL1 to obtain a required illuminance;
adjusting the current PWM value of the light area L1 to enable the average value of the illumination of the subarea OL1 or the illumination of a certain point in the subarea O' to reach the required illumination; at this time, the current PWM value of the light region L1 is the current PWM value of the light region L1.
The invention also provides an ADB headlamp brightness and light zone adaptive adjusting device for realizing the ADB headlamp brightness and light zone adaptive adjusting method, which comprises the following steps: the device comprises a camera, an illumination sensor, an ESC (electronic stability control), a high beam and low beam switch, an ADB automatic switch, an ADB functional module and a left LED matrix lamp and a right LED matrix lamp;
the camera is used for acquiring vehicle obstacle information and further determining the opening and closing of each light area according to the vehicle obstacle information;
the illumination sensor is used for acquiring the illumination of ambient light;
the ESC is used for acquiring vehicle speed information;
the far and near light switch and the ADB automatic switch are used for acquiring the states of the far and near light switch and the ADB automatic switch;
and the ADB functional module controls the on and off of the left and right LED matrix lamps and the brightness adjustment according to the acquired vehicle obstacle information, the illuminance of ambient light, the vehicle speed information, the high and low beam switches and the state of the ADB automatic switch.
Further, the illumination sensor is a solar-rain sensor.
Further, the device also comprises an IBCM, and the ADB functional module is integrated in the IBCM.
Further, ADB activates when the following conditions are simultaneously satisfied: (1) the ADB automatic switch is in AUTO gear, (2) the dipped headlight is in a lighting state and the high beam switch is turned on, (3) the vehicle speed is greater than V1, and (4) the ambient light intensity is less than Q1.
Further, ADB exits when one of the following conditions is satisfied: (1) the ADB automatic switch is in a non-AUTO gear, (2) the dipped headlight is in an off state or the high beam switch is turned off, (3) the vehicle speed is less than V2, wherein V2< V1, (4) the ambient light intensity is greater than Q2, and Q2> Q1.
Compared with the prior art, the invention has the following advantages and beneficial effects:
when the ADB is activated, the central light area is firstly lightened, and then other light areas are lightened to two sides in sequence, so that the illumination intensity is basically kept consistent after each subarea is superposed with ambient light; if a certain light zone is in a closed state, the light zone is skipped, the next light zone in an open state is lightened, and adaptive adjustment of brightness under different ambient lights is performed, so that the problem of inconsistent illumination after ADB light is superposed with different ambient lights can be effectively solved.
In addition, the ADB headlamp brightness and light area adaptive adjusting device provides judgment conditions for ADB activation and exit, and can effectively solve the problems of sudden opening or closing of high beam and sudden brightness change.
Drawings
Fig. 1 is a schematic diagram of an adaptive dimming control (ADB) headlight luminance and light range adjustment apparatus according to an embodiment of the present invention;
fig. 2 is a light intensity distribution diagram of a light region according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating PWM state transition when brightness is changed according to an embodiment of the present invention;
fig. 4 is a sectional view of an ADB headlamp according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The invention solves the problems that the brightness of light irradiated by ADB is consistent and the perceived illuminance is inconsistent under different scenes after the ambient light is superposed aiming at different ambient lights, and the human eye sensory difference is caused by the conditions that the far light is suddenly turned on or off, the brightness is suddenly changed and the like.
As shown in fig. 1, the ADB headlight brightness and light zone adaptive adjusting device of the present invention includes a sunlight and rain sensor, an IBCM (integrated ADB function), a high beam and low beam switch, an ADB automatic switch, a camera, an ESC, and the like.
Wherein: the sunlight and rainfall sensor provides ambient illumination parameters; the IBCM integrates an ADB function and is used for controlling the on or off of the high-beam and low-beam light and the ADB function; the ADB functional module controls the brightness and the switch of the matrix type LED; the ADAS camera provides information such as environmental barriers, and further determines the opening and closing of each light area according to the information of the vehicle barriers. And a high beam and low beam switch, an ESC and the like are used as input and used as control input for opening and closing the high beam by the IBCM. The left lamp and the right lamp are used as actuators to execute the control command of the ADB function module.
Specifically, the IBCM (body controller) determines whether the ADB function module is turned on or off according to the collected hard-line high beam, low beam, and ADB automatic lighting states, the received vehicle speed information sent by the ESC, and the ambient lighting information of the solar-rain sensor, as follows:
ADB function on condition (all conditions are satisfied):
1. the ADB light switch is in AUTO grade;
2. the dipped beam is in a lighting state and the high beam switch is turned on;
3. the vehicle speed is greater than V1;
4. the sunlight and rainfall sensor collects that the ambient light intensity is less than Q1;
ADB function exit conditions (only any one of them is required):
1. the ADB light switch is in a non-AUTO grade;
2. the dipped beam is in the off state or the high beam switch is turned off;
3. vehicle speed is less than V2 (V2 < V1);
4. the sunlight and rainfall sensor acquires that the ambient light intensity is greater than Q2 (Q2 > Q1).
Meanwhile, the IBCM determines the LEDs needing to be turned off according to the vehicle obstacle information sent by the camera. The IBCM transmits the LED and the brightness information which need to be closed to the left and right lamp panels through the CAN; IBCM mainly requires control processing such as coordinate conversion and light area confirmation.
The IBCM also controls the current PWM value of each light area according to the collected illumination information of the sunlight and rainfall sensor (the light intensity collected by the sunlight and rainfall sensor is used for replacing the light intensity of the ambient light), so that the illumination intensity of each environment is basically kept consistent after the ambient light is superposed.
The method comprises the following specific steps:
s1, in a dark room, testing a light intensity distribution graph of the LED lighting in a single light region (PWM = X, at this time, PWM is set to 1, and the following PWM is a ratio of the PWM), and determining an illuminance curve of the single light region as shown in fig. 2. Taking the range (-A, A) of the central light region O as an example, the illumination intensity of the point with the central light intensity of 0 is assumed to be Y 0 lx (Ix, lux, i.e., illuminance), edge A point light intensity is Y A lx, intensity at midpoint A/2 of edge and center is Y A/2 lx, fitting a quadratic illumination curve of a single light region according to the three terms:
illumination intensity Y =2 (Y) A +Y 0 -2Y A/2 )/A 2 *X 2 +(4Y A/2 -3Y 0 -Y A )/A*X+Y 0 ，X∈(-A，A)。
And (4) solving a fitting curve of each zone according to the same type method.
S2, determining a high beam on illumination point Q1 (the light intensity Q1 is an ADB activation condition), and taking the ADB function off light intensity Q2 (the illumination requirement can be guaranteed) as a target value. The illumination intensity is Q1 when the LED is started for the first time, and the PWM value is gradually increased within the time t, so that the illumination intensity at the time t is equivalent to the illumination intensity of Q2. As shown in fig. 3, when the light intensity is just lower than Q1, the ADB function is activated, and the PWM of the light region is adjusted such that the light intensity corresponding to the adjusted PWM is equal to the preset light intensity (Q2, target value in this embodiment).
And S3, taking the effect Q2 of the closed environment light intensity as a reference, in a darkroom, adjusting the PWM value of each light area to enable the illumination intensity to be equivalent to the environment light of the Q2, wherein the PWM value of each light area is the maximum value.
Assuming that the irradiation angle range of the light region L1 is (B-C, B + C), and the maximum PWM value is Y; the irradiation angle range of the central light area O is (-A, A), and the maximum value of PWM is X; the irradiation angle range of the light region R1 is (D-E, D + E), and the maximum PWM value is Z;
typically, there is partial overlap at the edges of the light regions: a < B + C, D-E < A, then 3 regions will have 5 segments, as follows:
(B-C，-A)；(-A，B+C)；(B+C，D-E)；(D-E，A)；(A，D+E)。
the relationship between the light intensity of each segment and the PWM is as follows (the light intensity adjusting method is explained below for 3 segments):
o-region PWM = X field strength:
Y o ＝2(Y A +Y 0 -2Y A/2 )/A 2 *X 2 +(4Y A/2 -3Y 0 -Y A )/A*X+ 0 ；X∈(-A，A)；
similarly, the PWM = Z field strength of the R1 region is:
Y R1 ＝2(Y D +Y D+E -2Y (2D+E)/2 )/E 2 *X 2 +(4Y (D+E)/2 -3Y D -Y E )/A*X+Y D ；X∈(D-E，D+E)；
similarly, the L1 region PWM = Y field strength is:
Y L1 ＝2(Y B +Y B+C -2Y (2B+E)/2 )/C 2 *X 2 +(4Y (2B+C)/2 -3Y B -Y B+C )/C*X+Y B ；X∈(B-C，B+C)。
if the percentage coefficient of the PWM in the O area is P1, the percentage coefficient of the PWM in the L1 area is P2, the percentage coefficient of the PWM in the R1 area is P3, and the percentage coefficients are used to calculate the duty ratio, the field strength in the overlapped area is:
Y＝P2*Y L1 ，X∈(B-C，-A)
Y＝P1*Y o +P2*Y L X∈(-A，B+C)
Y＝P1*Y o ，X∈(B+C，D-E)
Y＝P1*Y o +P3*Y R1 ，X∈(D-E，A)
Y＝P3*Y R1 ，X∈(A，D+E)
the relationship of the light intensity to the coordinates and the PWM for each coordinate point can be obtained.
In order to ensure that the light intensity decreases from the central point of the whole vehicle to both sides, namely in the illumination range, for example (-20 degrees and 20 degrees), the light intensity increases in the range of (-20 degrees and 0 degrees, the light intensity decreases in the range of (0 degrees and 20 degrees), and the illumination is ensured to be uniform as much as possible. The average value of the illuminance in the range or the illuminance at a certain point can be made to reach the required illuminance.
Calculating an initial value:
the central light area is calculated first, and then the light areas on the two sides are calculated in sequence. Wherein, P1 is calculated according to different scenes, such as the environment light intensity Q1 and the target value Q2 when the LED is started for the first time. Therefore, the light intensity value of-A/2 (selected midpoint) in the O light area is Q2-Q1. And the PWM is obtained by inverse solution according to the fitted curve. That is, Y = Q2-Q1, and P1 is obtained. And sequentially calculating other values after the initial value is obtained.
When the ambient light illumination changes, the curve relation between the initial value of the PWM in the O area and the ambient light Qx is obtained as follows:
P1＝4*(Qx-Q1)/(Y A +6Y A/2 -Y 0 ) (ii) a And then the value of P1 is calculated according to the relation curve.
And S4, according to the ambient brightness and the obstacle information, the brightness is gradually adjusted under the premise of ensuring the dazzle prevention, and the steady switching of the sensed ambient brightness of the main pipe is realized when the ambient brightness is changed and the ambient brightness is switched on and off. And after the left lamp panel and the right lamp panel receive the IBCM control signal, the LED matrix of the left lamp and the right lamp is driven to be lightened and adjusted to proper brightness.
When the light area is closed, the control flow is as follows:
as shown in fig. 4, the partitions of the ADB headlamp sequentially include … … L2', L1L2, L1', OL1, O ', OR1, R1', R1R2, and R2' … … from left to right; wherein: … … L2, L1, O, R and R2 … … are light regions of the ADB headlamp in sequence, … … L1L2, OL1, OR1 and R1R2 … … are overlapping regions between two adjacent light regions of the ADB headlamp in sequence, and … … L2', L1', O ', R1' and R2' … … are residual regions of the light regions of the ADB headlamp except the overlapping regions;
in a darkroom, acquiring a light intensity distribution diagram of each light area of the ADB headlamp, and further determining an illumination curve of each light area;
when the ADB is activated, the central light area is lightened firstly, and then other light areas are lightened sequentially towards two sides, so that the illumination intensity is basically consistent after each subarea is superposed with the ambient light; if a certain light zone is in a closed state, skipping the light zone, and lightening the next light zone in an open state;
the method comprises the following specific steps:
s1, when ADB is activated, firstly judging whether a central light area O is opened or not; if the light area O is opened, calculating to obtain a current PWM value of the light area O by combining the illuminance of the ambient light, the preset target illuminance and the illuminance curve of the light area O, so that the illuminance of the subarea O' reaches the target illuminance; if the optical area O is closed, executing the step S4;
s2, judging whether an adjacent light area L1 on the left side of the light area O is opened or not; if the light area L1 is opened, calculating to obtain a current PWM value of the light area L1 by combining the illuminance of the ambient light, the preset target illuminance, the illuminance provided by the light area O to the subarea OL1 and an illuminance curve of the light area L1, so that the illuminance of the subarea OL1 reaches the target illuminance; if the light zone L1 is closed, executing the step S4;
s3, judging whether an adjacent light area L2 on the left side of the light area L1 is opened or not; if the light area L2 is opened, calculating a current PWM value of the light area L2 by the same method as that when the light area L1 is opened, so that the illumination of the subarea L1L2 reaches the target illumination; by analogy, continuously judging the adjacent light area on the left side until all the light areas on the left side are calculated; if the light zone L2 is turned off, step S4 is executed;
s4, if a certain light area is closed, judging whether an adjacent light area on the left side of the light area is opened or not; if the adjacent light area on the left side of the light area is opened, calculating the current PWM value of the adjacent light area on the left side of the light area by the same method as that when the light area O is opened; if the adjacent light zone on the left side of the light zone is closed, executing step S4;
the control method of the right light area is consistent with that of the left light area. And according to the opening and closing states of the light areas, sequentially calculating the current PWM value of each light area from the center to two sides.
Further, the calculating, by combining the illuminance of the ambient light, the preset target illuminance and the illuminance curve of the optical area O, a current PWM value of the optical area O, so that the illuminance of the partition O' reaches the target illuminance, includes:
subtracting the illumination of the ambient light from the preset target illumination to obtain the required illumination;
adjusting the current PWM value of the optical area O to enable the average value of the illumination of the subarea O 'or the illumination of a certain point in the subarea O' to reach the required illumination; at this time, the current PWM value of the optical area O is the current PWM value of the optical area O.
Further, the calculating of the current PWM value of the optical area L1 by combining the illuminance of the ambient light, the preset target illuminance, the illuminance provided by the optical area O to the sub-area OL1, and the illuminance curve of the optical area L1 includes:
subtracting the illuminance of the ambient light from the preset target illuminance, and subtracting the illuminance provided by the light area O to the subarea OL1 to obtain the required illuminance;
adjusting the current PWM value of the light area L1 to enable the average value of the illumination of the subarea OL1 or the illumination of a certain point in the subarea O' to reach the required illumination; at this time, the current PWM value of the light region L1 is the current PWM value of the light region L1.
It should be noted that, according to implementation requirements, each step/component described in the present application can be divided into more steps/components, and two or more steps/components or partial operations of the steps/components can also be combined into a new step/component to achieve the purpose of the present invention.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (9)
1. An ADB headlamp brightness and light area self-adaptive adjusting method is characterized by comprising the following steps:
the partitions of the ADB headlamp sequentially comprise … … L2', L1L2, L1', OL1, O ', OR1, R1', R1R2 and R2' … … from left to right; wherein: … … L2, L1, O, R and R2 … … are light regions of the ADB headlamp in sequence, … … L1L2, OL1, OR1 and R1R2 … … are overlapping regions between two adjacent light regions of the ADB headlamp in sequence, and … … L2', L1', O ', R1' and R2' … … are residual regions of the light regions of the ADB headlamp except the overlapping regions;
in a darkroom, acquiring a light intensity distribution diagram of each light area of the ADB headlamp, and determining an illumination curve of each light area according to the light intensity distribution diagram;
when the ADB is activated, the central light area is lightened firstly, and then other light areas are lightened sequentially towards two sides, so that the illumination intensity is basically consistent after each subarea is superposed with the ambient light; if a certain light area is in a closed state, skipping the light area, and lightening the next light area in an open state;
the method comprises the following specific steps:
s1, when ADB is activated, firstly judging whether a central light area O is opened or not; if the optical area O is opened, calculating to obtain a current PWM value of the optical area O by combining the illuminance of ambient light, a preset target illuminance and an illuminance curve of the optical area O, so that the illuminance of the subarea O' reaches the target illuminance; if the optical area O is closed, executing the step S4;
s2, judging whether an adjacent light area L1 on the left side of the light area O is opened or not; if the light area L1 is opened, calculating to obtain a current PWM value of the light area L1 by combining the illuminance of the ambient light, the preset target illuminance, the illuminance provided by the light area O to the subarea OL1 and an illuminance curve of the light area L1, so that the illuminance of the subarea OL1 reaches the target illuminance; if the light zone L1 is closed, executing the step S4;
s3, then judging whether an adjacent light area L2 on the left side of the light area L1 is opened or not; if the light area L2 is opened, calculating a current PWM value of the light area L2 by the same method as that when the light area L1 is opened, so that the illumination of the subarea L1L2 reaches the target illumination; by analogy, continuously judging the adjacent light area on the left side until all the light areas on the left side are calculated; if the light zone L2 is turned off, step S4 is executed;
s4, if a certain light area is closed, judging whether an adjacent light area on the left side of the light area is opened or not; if the adjacent light area on the left side of the light area is opened, calculating the current PWM value of the adjacent light area on the left side of the light area by the same method as that when the light area O is opened; if the adjacent light zone on the left side of the light zone is closed, executing step S4;
the control method of the right light area is consistent with that of the left light area.
2. The ADB headlight luminance and dimming adaptive adjustment method according to claim 1, wherein determining an illuminance curve of a single dimming zone comprises:
let the central light intensity of the light zone be Y 0 Light intensity of point A at the edge of the light zone is Y A Light intensity at the center of the edge of the optical region is Y A/2 According to the center, midpoint, and edge positions of the light region and the corresponding lightAnd (3) fitting an illuminance quadratic curve of a single light area:
Y＝2(Y A +Y 0 -2Y A/2 )/A 2 *X 2 +(4Y A/2 -3Y 0 -Y A )/A*X+Y 0 ，X∈(-A，A)。
3. the ADB headlamp luminance and light zone adaptive adjustment method of claim 1, wherein calculating a current PWM value of a light zone O by combining an illuminance of ambient light, a preset target illuminance, and an illuminance curve of the light zone O so that an illuminance of a zone O' reaches the target illuminance comprises:
subtracting the illuminance of the ambient light from a preset target illuminance to obtain a required illuminance;
adjusting the current PWM value of the optical area O to enable the average value of the illumination of the subarea O 'or the illumination of a certain point in the subarea O' to reach the required illumination; at this time, the current PWM value of the optical area O is the current PWM value of the optical area O.
4. The ADB headlamp luminance and light zone adaptive adjustment method of claim 1, wherein calculating the current PWM value of the light zone L1 by combining the illuminance of the ambient light, the preset target illuminance, the illuminance of the light zone O provided to the segment OL1, and the illuminance curve of the light zone L1, so that the illuminance of the segment OL1 reaches the target illuminance comprises:
subtracting the illuminance of the ambient light from the preset target illuminance, and subtracting the illuminance provided by the light area O to the subarea OL1 to obtain the required illuminance;
adjusting the current PWM value of the light area L1 to enable the average value of the illumination of the subarea OL1 or the illumination of a certain point in the subarea O' to reach the required illumination; at this time, the current PWM value of the light region L1 is the current PWM value of the light region L1.
5. An ADB headlamp luminance and dimming adaptive adjusting apparatus for implementing the ADB headlamp luminance and dimming adaptive adjusting method of any one of claims 1 to 4, comprising: the device comprises a camera, an illumination sensor, an ESC, a high beam and low beam switch, an ADB automatic switch, an ADB functional module and a left LED matrix lamp and a right LED matrix lamp;
the camera is used for acquiring vehicle obstacle information and further determining the opening and closing of each light area according to the vehicle obstacle information;
the illumination sensor is used for acquiring the illumination of ambient light;
the ESC is used for acquiring vehicle speed information;
the far and near light switch and the ADB automatic switch are used for acquiring the states of the far and near light switch and the ADB automatic switch;
and the ADB functional module controls the on and off of the left and right LED matrix lamps and the brightness adjustment according to the acquired vehicle obstacle information, the illuminance of ambient light, the vehicle speed information, the high and low beam switches and the state of the ADB automatic switch.
6. An ADB headlight brightness and dimming adaptive adjusting device according to claim 5, wherein the light sensor is a solar-rain sensor.
7. An ADB headlamp luminance and dimming adaptive adjustment device according to claim 5, further comprising an IBCM, wherein the ADB function module is integrated in the IBCM.
8. An ADB headlight brightness and dimming adaptive adjustment device according to claim 5, characterized in that the ADB is activated when the following conditions are simultaneously fulfilled: (1) the ADB automatic switch is in AUTO gear, (2) the dipped headlight is in a lighting state and the high beam switch is turned on, (3) the vehicle speed is greater than V1, and (4) the ambient light intensity is less than Q1.
9. An ADB headlamp luminance and dimming adaptive adjustment device according to claim 6, wherein the ADB exits when one of the following conditions is satisfied: (1) the ADB automatic switch is in a non-AUTO gear, (2) the dipped headlight is in an off state or the high beam switch is turned off, (3) the vehicle speed is less than V2, wherein V2< V1, (4) the ambient light intensity is greater than Q2, and Q2> Q1.
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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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