CN110614945A - Light modulation method of ADB headlamp system and calibration target for light modulation - Google Patents
Light modulation method of ADB headlamp system and calibration target for light modulation Download PDFInfo
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- CN110614945A CN110614945A CN201810638256.3A CN201810638256A CN110614945A CN 110614945 A CN110614945 A CN 110614945A CN 201810638256 A CN201810638256 A CN 201810638256A CN 110614945 A CN110614945 A CN 110614945A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000681 Certain safety factor Toxicity 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses a dimming method of an ADB headlamp system and a calibration target for dimming, wherein the dimming method comprises the following steps: 10) designing and calculating theoretical light spots of a headlamp of a target vehicle, which are irradiated at a preset position, and designing a calibration target according to the theoretical light spots; 20) fixing the calibration target, and parking the target vehicle so that the calibration target is positioned at a preset position of the target vehicle; 30) and starting and adjusting each headlamp of the target vehicle so that the actual light spot of the corresponding headlamp is positioned in the corresponding theoretical light spot area. After the dimming in the steps, the actual light spot of the target vehicle headlamp at the preset position is located in the area of the theoretical light spot, so that the target vehicle headlamp meets the design and manufacture requirements before being put into use, and after being put into use, the actual light spot of the headlamp is also located in the area of the theoretical light spot, so that the performance of an ADB headlamp system is ensured. In addition, the dimming method has the advantages of simple steps, easiness in implementation, low cost and high operability.
Description
Technical Field
The invention relates to the technical field of vehicle lighting systems, in particular to a dimming method of an ADB headlamp system and a calibration target for dimming.
Background
The vehicle is provided with an illumination function for enabling a driver to clearly see objects in a traveling direction during traveling at night, and a lighting device for notifying other vehicles or other users with roads of the traveling state of the own vehicle, wherein the headlamps are illumination lamps for illuminating a road ahead of the traveling direction of the vehicle.
Traffic regulations stipulate that the amount of light beam directed to drivers traveling in opposite directions should be reduced while the vehicle is traveling, so as to prevent dazzling of the drivers. To meet the regulations of this traffic regulation, some vehicles are equipped with ADB headlamp systems.
An adb (adaptive Driving beam) headlamp system is an irradiation device for changing an illumination angle, brightness, width, and length of light irradiated from a headlamp, and includes a camera, an electronic control unit, a headlamp, and the like. During operation, according to the road condition that the camera surveyed, corresponding unit among the electronic control unit control head-light is opened to the driver that makes the vehicle of traveling in opposite directions is in the dark space, thereby realizes preventing the dazzling purpose of driver. In order to ensure the performance of the ADB headlamp system, it is required that the deviation of the ADB system is as small as possible.
In view of the above, a technical problem to be solved by those skilled in the art is how to provide a dimming method for an ADB headlamp system, so as to reduce the deviation of the ADB headlamp system and improve the performance of the ADB headlamp system.
Disclosure of Invention
In order to solve the above technical problem, an object of the present invention is to provide a dimming method of an ADB headlamp system, including the steps of:
10) designing and calculating theoretical light spots of a headlamp of a target vehicle, wherein the theoretical light spots irradiate at a preset position, and designing a calibration target according to the theoretical light spots;
20) fixing the calibration target and parking the target vehicle so that the calibration target is positioned at the preset position of the target vehicle;
30) and starting and adjusting each headlamp of the target vehicle so as to enable the actual light spot of the corresponding headlamp to be positioned in the corresponding theoretical light spot area.
It should be noted that the theoretical light spot is a theoretical value calculated according to an incident parameter of the headlamp, and the theoretical value can ensure that other road users are prevented from dazzling when the ADB headlamp system works.
In the invention, after dimming in the steps, the actual light spot of the headlamp of the target vehicle at the preset position is positioned in the area of the theoretical light spot, so that the headlamp of the target vehicle can meet the design and manufacture requirements before being put into use, and after being put into use, the actual light spot formed by the headlamp in the running process of the target vehicle is also positioned in the area of the theoretical light spot obtained by design and calculation, so that the performance of an ADB headlamp system can be ensured. In addition, the dimming method has the advantages of simple steps, easiness in implementation, low cost and high operability.
Optionally, in step 20), the predetermined positions are set as: the center line of the calibration target is collinear with the center line of the target vehicle, or the distance between the center line of the calibration target and the center line of the target vehicle is less than 3 mm.
Optionally, in step 20), the predetermined position is further set as: the distance between the calibration target and the front end of the vehicle body of the target vehicle is 1500mm +/-30 mm.
Optionally, the calibration target is provided with four light spot regions, which are a left far light region, a left near light region, a right far light region and a right near light region, and correspond to four headlamps of the target vehicle respectively;
the size of the left far light area and the right far light area along the width direction of the vehicle body is 96mm, and the size of the left near light area and the right near light area along the width direction of the vehicle body is 104 mm.
Optionally, in step 30), if the actual light spot is not located in the area corresponding to the theoretical light spot, the headlamp is adjusted by using an inner hexagonal wrench.
Optionally, in step 30), the headlamps of the target vehicle are turned on in sequence.
In addition, the invention also provides a calibration target for dimming of the ADB headlamp system, wherein the calibration target is provided with four light spot regions which are a left far light region, a left near light region, a right far light region and a right near light region respectively;
the left far light area and the right far light area, and the left near light area and the right near light area are symmetrical relative to the same central line.
Alternatively, two boundary lines of each of the spot regions in the width direction are straight lines parallel to each other.
Optionally, a bottom plate of the calibration target is black, a boundary line of each of the light spot regions is white, and a matte degree between the bottom plate and the boundary line is less than 10 °.
Drawings
FIG. 1 is a schematic diagram of an ADB headlamp system error analysis before dimming;
FIG. 2 is a flow chart of a dimming method for an ADB headlamp system in one embodiment of the present invention;
FIG. 3 is a schematic diagram of an ADB headlamp system dimming process provided by the present invention;
FIG. 4 is a schematic structural diagram of the calibration target of FIG. 3;
fig. 5 is a schematic diagram of an ADB headlamp system operating after dimming.
In FIGS. 3-4:
1 calibration target, 2 target vehicle.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1-4, fig. 1 is a schematic diagram illustrating an error analysis of an ADB headlamp system before dimming; FIG. 2 is a flow chart of a dimming method for an ADB headlamp system in one embodiment of the present invention; FIG. 3 is a schematic diagram of an ADB headlamp system dimming process provided by the present invention; FIG. 4 is a schematic diagram of the calibration target of FIG. 3.
Generally, the error of the ADB system is derived from the following aspects: firstly, response errors of all electronic control units in the system; secondly, the calibration error of the camera comprises a production line error and a manufacturing error, particularly the error of the camera along the width direction of the vehicle; thirdly, the headlamps are centered and calibrated, and the centering and calibrating errors refer to the symmetry degree of the headlamps on two sides relative to the center line. Under the influence of the above three errors, the ADB system may have errors.
As shown in FIG. 1, wherein α1Means a theoretical value, alpha, of the angle between the right side boundary of the headlight and the center line2Means a theoretical value, alpha, of the angle between the left boundary of the headlight and the center line1' actual value of included angle, alpha, between right side boundary of headlamp and center line in consideration of error factor2' means an actual value of an angle between the left side boundary of the headlamp and the center line in consideration of an error factor. And [ alpha ]2，α1]Refers to the theoretical shielding range, [ alpha ] of the headlamp2′，α1′]The actual shading range of the headlamp in consideration of the error factor is referred to.
As can be seen from fig. 1, when the error of the ADB headlamp system is large, the shielding range during actual operation cannot be completely shielded from dazzling of other drivers, and therefore, the error needs to be minimized to ensure the performance of the ADB headlamp system.
In order to solve the technical problem, in an embodiment of the present invention, there is provided a dimming method of an ADB headlamp system, as shown in fig. 2 and 3, the dimming method including the steps of:
s10: the theoretical light spot formed at a predetermined position by the headlight irradiation of the target vehicle 2 is calculated, and the calibration target 1 is designed based on the theoretical light spot.
In this step, a theoretical light spot formed at a predetermined position by the headlight of the target vehicle 2 is fixedly set on the calibration target 1, and the calibration target 1 can be used as a reference for dimming.
S20: the calibration target 1 is fixed, and the target vehicle 2 is parked such that the calibration target 1 is located at a predetermined position of the target vehicle 2.
Firstly, parking a target vehicle 2 in a vehicle parking area, and then fixing a calibration target 1 so that the calibration target 1 is positioned at a preset position of the target vehicle 2; alternatively, the calibration target 1 is first fixed at a certain position, and then the position of the subject vehicle 2 is adjusted so that the calibration target 1 is located at a predetermined position of the subject vehicle 2. Therefore, in this step, as long as it can be ensured that the relative position between the calibration target 1 and the target vehicle 2 meets the requirement, the method of parking the target vehicle 2 first and then fixing the calibration target 1 is easier to implement, and therefore, the positions of the calibration target 1 and the target vehicle 2 are usually arranged by adopting the first method during dimming.
S30: each headlamp of the target vehicle 2 is turned on and adjusted so that the actual spot formed by the illumination of the corresponding headlamp is located within the corresponding theoretical spot area.
It should be noted that the theoretical light spot is a theoretical value calculated according to the incident parameters of the headlamps, and the theoretical value can ensure that the ADB headlamp system avoids dazzling other road users during operation, and meanwhile, in order to further ensure the performance of the ADB headlamp system, the theoretical light spot is usually reduced, i.e., a certain safety factor is set, so that when the actual light spot is within the range of the theoretical light spot, other road users can be completely shielded.
Therefore, in the present invention, after dimming through the above steps, the actual light spot of the headlamp of the target vehicle 2 at the predetermined position is located in the area of the theoretical light spot, so that the headlamp of the target vehicle 2 can meet the design and manufacturing requirements before being put into use, and meanwhile, after being put into use, the actual light spot formed by the headlamp in the driving process of the target vehicle 2 is located in the theoretical light spot area obtained by the design calculation, so that the performance of the ADB headlamp system can be ensured. In addition, the dimming method has the advantages of simple steps, easiness in implementation, low cost and high operability.
Specifically, as shown in fig. 2 and 3, in the step S20, after the position is adjusted, the predetermined position between the calibration target 1 and the target vehicle 2 is set as: the center line of the calibration target 1 and the center line of the target vehicle 2 are collinear, or the distance between the center line of the calibration target 1 and the center line of the target vehicle 2 is less than 3mm, and the deviation between the two center lines is negligible.
In this embodiment, before the dimming operation, the calibration target 1 and the target vehicle 2 have the same center line, so that the headlight of the target vehicle 2 perpendicularly enters the calibration target 1.
It will be understood that the calibration targets 1 and the target vehicle 2 do not necessarily have to have a common center line, i.e. the headlights of the target vehicle 2 may also be obliquely incident on the calibration targets 1, but the predetermined position between the two is easy to achieve and control in this embodiment, and the light is easier to control at normal incidence than at oblique incidence.
Further, as shown in fig. 3, in the above step S20, the predetermined position between the calibration target 1 and the target vehicle 2 is further set as: the distance between the calibration target 1 and the front end of the vehicle body of the target vehicle 2 is 1500mm +/-30 mm, wherein +/-30 mm is an allowable error range,
certainly, the distance between the calibration target 1 and the front end of the vehicle body of the target vehicle 2 is not limited to this, but when the distance between the calibration target 1 and the front end of the vehicle body of the target vehicle 2 satisfies the above relationship, the light spot formed when the headlight of the target vehicle 2 irradiates on the calibration target 1 is moderate, so that an error caused by that the edge is too fuzzy when the light spot is too close to the target is too large is avoided, and an error caused by that the light spot is not easily identified when the light spot is too far away from.
Specifically, as shown in fig. 4, the calibration target 1 is provided with four light spot regions, i.e., a left far light region, a left near light region, a right far light region and a right near light region, and corresponds to four headlamps of the target vehicle 2, i.e., when the headlamps of the target vehicle 2 irradiate the calibration target 1, the left far light spot should be located in the left far light region, the left near light spot should be located in the left near light region, the right far light spot should be located in the right far light region, and the right near light spot should be located in the right near light region.
Meanwhile, as described above, when the predetermined position between the calibration target 1 and the target vehicle 2 satisfies the above-described condition (both have the same center line, and the distance between the calibration target 1 and the front end of the vehicle body of the target vehicle 2 is 1500mm ± 30mm), the dimension of the left and right high beam regions in the vehicle body width direction of the target vehicle 2 is 96mm, and the dimension of the left and right low beam regions in the vehicle body width direction is 104 mm.
As can be understood by those skilled in the art, in general, a rectangular light spot is formed when the high beam irradiates the calibration target 1, and a turning point is formed when the low beam irradiates the calibration target 1, based on which, the theoretical light spot shape and size formed by the high beam and the low beam are different, the size of the theoretical light spot formed by the high beam along the height direction of the vehicle body is larger, therefore, the size of the left and right low beam along the height direction of the vehicle body is 24mm, and the size of the left and right high beam along the height direction of the vehicle body is 182 mm.
In the foregoing embodiments, in step S30, in the dimming process, if the actual light spot is not located in the corresponding theoretical light spot region, the position of the corresponding headlamp is adjusted by the allen key until the actual light spot is located in the corresponding theoretical light spot region.
In addition, in step S30, the respective headlamps of the target vehicle 2 are turned on in sequence, i.e., one of the left low beam, the right low beam, the left high beam, and the right high beam is turned on at a time, so that the respective headlamps are adjusted individually.
Meanwhile, the invention also provides a calibration target 1 for dimming of an ADB headlamp system, as shown in FIG. 4, the calibration target 1 is provided with four light spot regions, namely a left far light region, a left near light region, a right far light region and a right near light region, which respectively correspond to four headlamps of a target vehicle 2;
and the left far light area and the right far light area, and the left near light area and the right near light area are symmetrical relative to the same central line.
As described above, the ADB headlamp system can be easily dimmed by the arrangement of the calibration target 1.
Specifically, two boundary lines of each spot region in the width direction are straight lines parallel to each other.
In the embodiment shown in fig. 4, each light spot area on the calibration target 1 is rectangular, but it is only necessary that two boundary lines of the light spot area along the width direction are straight lines, that is, the boundary lines of the light spot area along the height direction are not necessarily parallel straight lines, in order to ensure that the ADB system after dimming can prevent dazzling of other road users.
More specifically, as shown in fig. 4, the bottom plate of the calibration target 1 is black, the boundary line of each light spot area is white, and the matte degree between the bottom plate and the boundary line is less than 10 °, when the matte degree is too large, the light beam is seriously reflected diffusely when irradiating the calibration target 1, which affects the recognition degree of the light spots on the calibration target 1.
Of course, the matte degree of the bottom plate and the boundary line is not necessarily less than 10 °, and may be any value within a reasonable range.
In addition, the bottom plate material of the calibration target 1 can be a PVC plate, the surface of the calibration target is covered with a matte film, and the calibration target has a flat surface and no scratch or obvious bubbles. When dimming, the calibration target 1 is installed on a flat wall surface, and the height from the ground when the calibration target 1 is installed is determined according to the type of the target vehicle 2, so that the horizontal heights of the calibration target 1 and the headlamp of the target vehicle 2 are consistent.
With continued reference to fig. 5, fig. 5 is a schematic diagram of the operation of the ADB headlamp system after dimming.
As shown in fig. 5, after dimming, the actual dark area formed when the ADB headlamp system operates is within the range of the theoretical dark area, which can solve the error problem mentioned above, thereby avoiding or reducing the occurrence of the condition shown in fig. 1 and improving the operating performance of the ADB headlamp system.
The detailed descriptions of the dimming method of the ADB headlamp system and the calibration target for dimming are provided above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A dimming method of an ADB headlamp system, characterized by comprising the steps of:
10) designing and calculating theoretical light spots irradiated by headlamps of a target vehicle (2) at a preset position, and designing a calibration target (1) according to the theoretical light spots;
20) fixing the calibration target (1) and parking the target vehicle (2) so that the calibration target (1) is located at the predetermined position of the target vehicle (2);
30) and starting and adjusting each headlamp of the target vehicle (2) so that the actual light spot of the corresponding headlamp is positioned in the corresponding theoretical light spot area.
2. The dimming method according to claim 1, wherein in step 20), the predetermined position is set as: the center line of the calibration target (1) and the center line of the target vehicle (2) are collinear, or the distance between the center line of the calibration target (1) and the center line of the target vehicle (2) is less than 3 mm.
3. The dimming method according to claim 2, wherein in step 20), the predetermined position is further set as: the distance between the calibration target (1) and the front end of the vehicle body of the target vehicle (2) is 1500mm +/-30 mm.
4. A dimming method as claimed in claim 3, wherein the calibration target (1) is provided with four light spot regions, a left far light region, a left near light region, a right far light region and a right near light region, respectively, and corresponding to four headlamps of the target vehicle (2), respectively;
the size of the left far light area and the right far light area along the width direction of the vehicle body is 96mm, and the size of the left near light area and the right near light area along the width direction of the vehicle body is 104 mm.
5. A dimming method according to any one of claims 1-4, wherein in step 30), if the actual spot is not within the area corresponding to the theoretical spot, the headlamp is adjusted by a socket head wrench.
6. Dimming method according to any of claims 1-4, characterized in that in step 30) the headlamps of the target vehicle (2) are switched on in sequence.
7. A calibration target for dimming of an ADB headlamp system is characterized in that the calibration target (1) is provided with four light spot regions which are a left far light region, a left near light region, a right far light region and a right near light region respectively;
the left far light area and the right far light area, and the left near light area and the right near light area are symmetrical relative to the same central line.
8. The calibration target for dimming as claimed in claim 7, wherein two boundary lines of each of the spot areas in the width direction are straight lines parallel to each other.
9. Calibration target for dimming according to claim 7, wherein the base plate of the calibration target (1) is black, the boundary line of each light spot area is white, and the matte degree of the base plate and the boundary line is less than 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638256.3A CN110614945A (en) | 2018-06-20 | 2018-06-20 | Light modulation method of ADB headlamp system and calibration target for light modulation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810638256.3A CN110614945A (en) | 2018-06-20 | 2018-06-20 | Light modulation method of ADB headlamp system and calibration target for light modulation |
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| CN110614945A true CN110614945A (en) | 2019-12-27 |
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| CN201810638256.3A Pending CN110614945A (en) | 2018-06-20 | 2018-06-20 | Light modulation method of ADB headlamp system and calibration target for light modulation |
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| JP2006151050A (en) * | 2004-11-25 | 2006-06-15 | Denso Corp | Variable light distribution control device |
| CN101559734A (en) * | 2008-01-29 | 2009-10-21 | 株式会社小糸制作所 | Automotive headlamp apparatus and control method thereof |
| CN103523114A (en) * | 2012-03-22 | 2014-01-22 | 黑拉许克联合股份有限公司 | Method for adjusting headlight using camera |
| CN106461184A (en) * | 2014-06-13 | 2017-02-22 | 优志旺电机株式会社 | Light projection device and onboard headlight |
| CN107226014A (en) * | 2017-04-13 | 2017-10-03 | 江苏文光车辆附件有限公司 | A kind of new automobile ADB headlights |
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2018
- 2018-06-20 CN CN201810638256.3A patent/CN110614945A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006151050A (en) * | 2004-11-25 | 2006-06-15 | Denso Corp | Variable light distribution control device |
| CN101559734A (en) * | 2008-01-29 | 2009-10-21 | 株式会社小糸制作所 | Automotive headlamp apparatus and control method thereof |
| CN103523114A (en) * | 2012-03-22 | 2014-01-22 | 黑拉许克联合股份有限公司 | Method for adjusting headlight using camera |
| CN106461184A (en) * | 2014-06-13 | 2017-02-22 | 优志旺电机株式会社 | Light projection device and onboard headlight |
| CN107226014A (en) * | 2017-04-13 | 2017-10-03 | 江苏文光车辆附件有限公司 | A kind of new automobile ADB headlights |
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Application publication date: 20191227 |