CN112319355A - ADB headlamp system and control method - Google Patents
ADB headlamp system and control method Download PDFInfo
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- CN112319355A CN112319355A CN202011038629.7A CN202011038629A CN112319355A CN 112319355 A CN112319355 A CN 112319355A CN 202011038629 A CN202011038629 A CN 202011038629A CN 112319355 A CN112319355 A CN 112319355A
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- 238000001514 detection method Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 1
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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
- B60Q1/14—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 having dimming means
- B60Q1/1415—Dimming circuits
- B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
- B60Q1/143—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
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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
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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]
- H05B45/30—Driver circuits
- H05B45/32—Pulse-control circuits
- H05B45/325—Pulse-width modulation [PWM]
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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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention aims to provide an ADB headlamp system and a control method, which mainly carry out image processing, light detection, ADB processing and dimming by a camera and an internal software module thereof, and output a control command to an LED lamp panel through a CAN bus; the camera module directly controls the dimming of each LED, so that the participation of an ADB algorithm controller and a vehicle lamp controller can be saved, and the system delay time is effectively shortened.
Description
Technical Field
The invention relates to the field of automobile lamps, in particular to an ADB headlamp system and a control method.
Background
With the development of automotive electronics, safety and comfort are more and more emphasized, and thus, an automatic distance lighting anti-glare (ADB) technology is in the process. The ADB technology prevents that the high beam from causing other vehicle drivers to dazzle when the biggest satisfied demand of driving, improves the driving comfort, reduces the potential safety hazard. As shown in fig. 1, in the existing ADB system architecture, a camera module, an ADB algorithm controller, a vehicle lamp are configured, camera module software is responsible for outputting detected object information, the ADB algorithm controller calculates an area of a shadow required to be established according to the object information sent by the camera module and sends the area of the shadow to the vehicle lamp controller through a CAN bus, and finally, the vehicle lamp controller judges how to dim each LED and drive the LED according to the light distribution condition of each LED in the vehicle lamp, so as to match the shadow area required to be formed by the ADB algorithm controller.
In the current architecture, ADB algorithm control, initialization time of lamp controller software and bus transmission time cause inevitable delay from object appearance to shadow formation of the whole ADB system, and the delay causes longer time from object appearance to shadow formation, so that the possibility that the front vehicle is dazzled occurs, which means that ADB function is failed
In view of the above problems, designing a new ADB headlamp system architecture, omitting an ADB algorithm controller and a vehicle lamp controller is a key to solve the above problems, and further, can reduce the input in material cost.
Disclosure of Invention
In order to solve the problems, the invention provides an ADB headlamp system and a control method, which mainly carry out image processing, light detection, ADB processing and dimming by a camera and an internal software module thereof, and output a control command to an LED lamp panel through a CAN bus; the dimming of each LED is directly controlled by the camera module, and the participation of an ADB algorithm controller and a vehicle lamp controller can be saved, so that the system delay time is effectively shortened, and the problems in the background technology are solved.
The invention aims to provide an ADB headlamp system, which comprises a camera module, an electronic control unit, a CAN bus, a power supply line and a vehicle lamp, wherein the camera module is connected with the vehicle lamp through the CAN bus, the electronic control unit is connected with the vehicle lamp through the power supply line, when a high beam needs to be turned on, the electronic control unit is responsible for supplying power to the high beam, the camera module is responsible for sending a control command to each LED of the high beam through the CAN bus so as to realize the high beam function and the ADB function of self-adaptive high beam, wherein the camera module comprises an image processing module, a light detection module, an ADB processing module, a dimming module and a CAN bus message sending module, the image processing module is connected with the light detection module, the light detection module is connected with the ADB processing module, the ADB processing module is connected with the dimming module, the dimming module is connected with the CAN bus message sending module, the image processing module, the light detection module, the ADB processing module, the dimming module and the CAN bus message sending module are sequentially executed when in operation.
The further improvement lies in that: the image processing module is used for detecting an object in a detection area of the camera module and periodically updating the state of the object; the light detection module distinguishes and calculates the type (same-direction vehicle/opposite-direction vehicle) of the object, the distance of the object, the horizontal direction angle of the object and the vertical direction angle of the object according to the light emitting condition of the object; the ADB processing module is responsible for calculating the minimum shadow area which can cover the whole object, namely the left boundary angle and the right boundary angle of the shadow area according to the information of the object; the dimming module converts the brightness of each LED to be adjusted into a current PWM value (0-100%) according to the light distribution condition of each LED of the left headlamp and the right headlamp, and minimizes the brightness to form a required shadow region; and the CAN bus message sending module sends the current PWM value of each LED to the CAN bus.
The further improvement lies in that: the electronic control unit is preferably a BCM or a pure hardware LED driver circuit.
The invention provides a control method of an ADB headlamp system, which comprises the following operation steps of each module in a camera module:
step 1: when an object appears in the detection area of the camera module, the image processing module is responsible for detecting the object and periodically updating the state of the object;
step 2: the light detection module distinguishes and calculates the type (same-direction vehicle/opposite-direction vehicle) of the object, the distance of the object, the horizontal direction angle of the object and the vertical direction angle of the object according to the light emitting condition of the object;
and step 3: an ADB processing module in an ADB algorithm controller in the existing ADB system is integrated into a camera module; the ADB processing module calculates the minimum shadow area which can cover the whole object, namely the left boundary angle and the right boundary angle of the shadow area according to the information of the object;
and 4, step 4: integrating a dimming module in a vehicle lamp controller in the existing ADB system into a camera module; the dimming module converts the brightness of each LED to be adjusted into a current PWM value (0-100%) according to the light distribution condition of each LED of the left headlamp and the right headlamp, and minimizes the brightness to form a required shadow region;
and 5: and the CAN bus message sending module sends the current PWM value of each LED to the CAN bus.
The invention has the beneficial effects that: the ADB processing module is integrated in the camera module, the dimming module is also integrated in the camera module, the integration of the ADB processing module and the dimming module is different from the independent and separate arrangement of the camera module, the ADB algorithm control and the vehicle lamp controller in the prior art, the camera module needs to carry out complex operation, and the selected central processing unit is superior to the central processing units of the ADB algorithm controller and the vehicle lamp controller in the operation speed, so the operation time of the ADB processing module and the dimming module on the camera module is far shorter than the time of the ADB algorithm controller and the vehicle lamp controller in the prior art. After the ADB algorithm controller and the vehicle lamp controller are omitted, the ADB system can reduce the software initialization time and the bus transmission time of the ADB algorithm controller and the vehicle lamp controller, can avoid the inevitable delay of the whole ADB system from the appearance of an object to the formation of a shadow area caused by the respective initialization time and the bus transmission time, and prevents the failure of the ADB function; meanwhile, the ADB processing module is integrated with the camera module, so that an independent ADB algorithm controller in the prior art is omitted, and the dimming module is integrated with the camera module, so that an independent car lamp controller in the prior art is omitted, the material cost caused by the ADB algorithm controller and the car lamp controller can be reduced, and the ADB processing module has cost advantage.
Drawings
FIG. 1 is a system architecture diagram of the present invention.
Fig. 2 is a data flow diagram of a camera module according to the present invention.
Figure 3 is a diagram of a prior art ADB system architecture.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
Example one
As shown in fig. 1-2, this embodiment provides an ADB headlamp system, which includes a camera module, an electronic control unit, a CAN bus, a power supply line and a lamp, wherein the camera module is connected to the lamp through the CAN bus, the electronic control unit is connected to the lamp through the power supply line, when the high beam is required to be turned on, the electronic control unit is responsible for supplying power to the high beam, the camera module is responsible for sending a control command to each LED of the high beam through the CAN bus, so as to implement the ADB function of the high beam and the adaptive high beam, wherein the camera module includes an image processing module, a light detection module, an ADB processing module, a dimming module and a CAN bus message sending module, the image processing module is connected to the light detection module, the light detection module is connected to the ADB processing module, the ADB processing module is connected to the dimming module, the dimming module is connected with the CAN bus message sending module, the image processing module, the light detection module, the ADB processing module, the dimming module and the CAN bus message sending module are sequentially executed when in operation.
The image processing module is used for detecting an object in a detection area of the camera module and periodically updating the state of the object; the light detection module distinguishes and calculates the type (same-direction vehicle/opposite-direction vehicle) of the object, the distance of the object, the horizontal direction angle of the object and the vertical direction angle of the object according to the light emitting condition of the object; the ADB processing module is responsible for calculating the minimum shadow area which can cover the whole object, namely the left boundary angle and the right boundary angle of the shadow area according to the information of the object; the dimming module converts the brightness of each LED to be adjusted into a current PWM value (0-100%) according to the light distribution condition of each LED of the left headlamp and the right headlamp, and minimizes the brightness to form a required shadow region; and the CAN bus message sending module sends the current PWM value of each LED to the CAN bus. The electronic control unit is a BCM.
Example two
The present embodiment provides a method for controlling an ADB headlamp system, wherein the operation steps of each module in a camera module are as follows:
step 1: when an object appears in the detection area of the camera module, the image processing module is responsible for detecting the object and periodically updating the state of the object;
step 2: the light detection module distinguishes and calculates the type (same-direction vehicle/opposite-direction vehicle) of the object, the distance of the object, the horizontal direction angle of the object and the vertical direction angle of the object according to the light emitting condition of the object;
and step 3: an ADB processing module in an ADB algorithm controller in the existing ADB system is integrated into a camera module; the ADB processing module calculates the minimum shadow area which can cover the whole object, namely the left boundary angle and the right boundary angle of the shadow area according to the information of the object;
and 4, step 4: integrating a dimming module in a vehicle lamp controller in the existing ADB system into a camera module; the dimming module converts the brightness of each LED to be adjusted into a current PWM value (0-100%) according to the light distribution condition of each LED of the left headlamp and the right headlamp, and minimizes the brightness to form a required shadow region;
and 5: and the CAN bus message sending module sends the current PWM value of each LED to the CAN bus.
The ADB processing module is integrated in the camera module, and the dimming module is also integrated in the camera module, which are different from the camera module, ADB algorithm control, and vehicle lamp controller in the prior art, because the camera module needs to perform complex operation, and the selected central processing unit is superior to the central processing units of the ADB algorithm controller and the vehicle lamp controller in operation speed, the operation time of the ADB processing module and the dimming module on the camera module is far shorter than the time of the ADB algorithm controller and the vehicle lamp controller. After the ADB algorithm controller and the vehicle lamp controller are omitted, the ADB system can reduce the software initialization time and the bus transmission time of the ADB algorithm controller and the vehicle lamp controller, can avoid the inevitable delay of the whole ADB system from the appearance of an object to the formation of a shadow area caused by the respective initialization time and the bus transmission time, and prevents the failure of the ADB function; meanwhile, the ADB processing module is integrated with the camera module, so that an independent ADB algorithm controller in the prior art is omitted, and the dimming module is integrated with the camera module, so that an independent car lamp controller in the prior art is omitted, the material cost caused by the ADB algorithm controller and the car lamp controller can be reduced, and the ADB processing module has cost advantage.
Claims (4)
1. An ADB headlamp system, characterized by: including camera module, electronic control unit, CAN bus, power supply line and car light, the camera module passes through the CAN bus and is connected with the car light, electronic control unit passes through the power supply line and is connected with the car light, when the high beam is opened to needs, electronic control unit is responsible for supplying power for the high beam, and the camera module is responsible for through every LED that the CAN bus gives the high beam sends control command, realizes the ADB function of high beam function and self-adaptation high beam, wherein, the camera module includes image processing module, light detection module, ADB processing module, module and CAN bus message sending module of adjusting luminance, image processing module with light detection module connects, light detection module with ADB processing module connects, ADB processing module with adjust luminance the module and the CAN bus message sending module is connected, the image processing module, the light detection module, the ADB processing module, the dimming module and the CAN bus message sending module are sequentially executed during operation.
2. The ADB headlamp system of claim 1, wherein: the image processing module is used for detecting an object in a detection area of the camera module and periodically updating the state of the object; the light detection module distinguishes and calculates the type (same-direction vehicle/opposite-direction vehicle) of the object, the distance of the object, the horizontal direction angle of the object and the vertical direction angle of the object according to the light emitting condition of the object; the ADB processing module is responsible for calculating the minimum shadow area which can cover the whole object, namely the left boundary angle and the right boundary angle of the shadow area according to the information of the object; the dimming module converts the brightness of each LED to be adjusted into a current PWM value (0-100%) according to the light distribution condition of each LED of the left headlamp and the right headlamp, and minimizes the brightness to form a required shadow region; and the CAN bus message sending module sends the current PWM value of each LED to the CAN bus.
3. The ADB headlamp system of claim 1, wherein: the electronic control unit is preferably a BCM or a pure hardware LED driver circuit.
4. A method of controlling an ADB headlamp system as described above, characterized by: the operation steps of each module in the camera module are as follows:
step 1: when an object appears in the detection area of the camera module, the image processing module is responsible for detecting the object and periodically updating the state of the object;
step 2: the light detection module distinguishes and calculates the type (same-direction vehicle/opposite-direction vehicle) of the object, the distance of the object, the horizontal direction angle of the object and the vertical direction angle of the object according to the light emitting condition of the object;
and step 3: an ADB processing module in an ADB algorithm controller in the existing ADB system is integrated into a camera module; the ADB processing module calculates the minimum shadow area which can cover the whole object, namely the left boundary angle and the right boundary angle of the shadow area according to the information of the object;
and 4, step 4: integrating a dimming module in a vehicle lamp controller in the existing ADB system into a camera module; the dimming module converts the brightness of each LED to be adjusted into a current PWM value (0-100%) according to the light distribution condition of each LED of the left headlamp and the right headlamp, and minimizes the brightness to form a required shadow region;
and 5: and the CAN bus message sending module sends the current PWM value of each LED to the CAN bus.
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| CN202011038629.7A CN112319355A (en) | 2020-09-28 | 2020-09-28 | ADB headlamp system and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111560A (en) * | 2022-05-25 | 2022-09-27 | 广东省三目汽车电子有限公司 | Stacked ADB (adaptive data bus) automobile headlamp and illumination method thereof |
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| CN111083387A (en) * | 2019-12-24 | 2020-04-28 | 浙江吉利汽车研究院有限公司 | Vehicle-mounted camera exposure signal synchronization method and system and vehicle |
| CN111098777A (en) * | 2019-12-30 | 2020-05-05 | 北京海纳川汽车部件股份有限公司 | Control method and system of vehicle lamp and vehicle |
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2020
- 2020-09-28 CN CN202011038629.7A patent/CN112319355A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009096249A (en) * | 2007-10-15 | 2009-05-07 | Toyota Motor Corp | Vehicular lighting system |
| WO2015050996A1 (en) * | 2013-10-01 | 2015-04-09 | Gentex Corporation | System and method for controlling exterior vehicle lights on motorways |
| CN110901514A (en) * | 2019-11-28 | 2020-03-24 | 北京海纳川汽车部件股份有限公司 | Vehicle and control method and device of high beam thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115111560A (en) * | 2022-05-25 | 2022-09-27 | 广东省三目汽车电子有限公司 | Stacked ADB (adaptive data bus) automobile headlamp and illumination method thereof |
| CN115111560B (en) * | 2022-05-25 | 2024-05-14 | 广东省三目汽车电子有限公司 | Superimposed ADB automobile headlamp and illumination method thereof |
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