An apparatus and method for automatically calibrating the partition angles of a headlamp ADB

Abstract

The present invention discloses a device and a method for automatically calibrating the ADB partition angles of a headlight, which include a communication module, a control module and an execution module. The communication module includes a light measurement screen communication module and a headlight communication module. The present invention realizes the full-automatic calibration of the ADB function partition range, avoids the operation errors caused by manual calibration, and improves the calibration accuracy; the control module of the present invention preferentially eliminates the angular error of the overall light optical center, and then gradually eliminates the partition errors on both sides, so as to control the overall light angle deviation of the headlight within a small range; the present invention can accurately calibrate each partition of the high beam, and realize the anti-glare function of the ADB system.

Description

Technical Field

[0001] The present invention belongs to the technical field of headlamp control, and particularly relates to an apparatus and method for automatically calibrating the partition angles of a front headlamp ADB. Background Art

[0002] When the lighting conditions are insufficient at night or in a tunnel, the driver tends to turn on the high beam to meet the vision requirements. There will be certain potential safety hazards for the vehicles in front due to the interference of the high beam. At this time, when the ADB (Adaptive Driving Beam) device turns on the high beam, it can ensure the driver's vision while reducing the driving impact on the vehicles in front.

[0003] In the prior art, the ADB device often uses a matrix LED headlamp. By dividing the high beam area and individually controlling the lighting or extinguishing of each area by the LED, the effect of adaptively extinguishing the high beam is achieved. When dividing the lighting area in the design stage, the projection angle range of each partition can be accurately calculated.

[0004] However, during the actual product manufacturing, the projection angle range of each partition depends on factors such as the lens processing accuracy and the LED chip mounting error control. Therefore, there is a deviation between the actual projection angle range of each partition and the design value. Severe partition deviation will lead to incorrect ADB recognition areas and fail to achieve the effect of avoiding dazzling the driver of the vehicle in front. Summary of the Invention

[0005] The purpose of the present invention is to provide an apparatus for automatically calibrating the partition angles of a front headlamp ADB to solve the problems raised in the above background art. An apparatus for automatically calibrating the partition angles of a front headlamp ADB provided by the present invention has the characteristics of accurately calibrating each partition of the high beam and realizing the anti-dazzle function of the ADB device.

[0006] Another purpose of the present invention is to provide a method for automatically calibrating the partition angles of a front headlamp ADB.

[0007] To achieve the above purpose, the present invention provides the following technical solution: An apparatus for automatically calibrating the partition angles of a front headlamp ADB includes a communication module, a control module, and an execution module. Among them, the communication module includes a light measurement screen communication module and a front headlamp communication module. The light measurement screen communication module is used to obtain the angle data of the actual illumination of the front headlamp, and the front headlamp communication module is used to obtain the expected partition angle data of the front headlamp, transmit the partition calibration sequence, and write the calibration result. The control module is used to determine the partition calibration sequence of the front headlamp during the calibration process. The execution module is used to judge whether the angle deviation of the actual partition exceeds the angle of the expected partition.

[0008] Further in the present invention, the photometric screen communication module is signal - connected to the photometric screen to obtain the angle data irradiated in the actual zones of the headlamp.

[0009] Further in the present invention, the photometric screen communication module is also signal - connected to the execution module to transfer the angle data irradiated in the actual zones of the headlamp to the execution module.

[0010] Further in the present invention, the headlamp communication module is connected to the OBD of the headlamp to obtain the expected zone angle data of the headlamp.

[0011] Further in the present invention, the headlamp communication module is also signal - connected to the control module to transfer the expected zone angle data of the headlamp to the control module, and transfer the zone calibration sequence determined by the control module to the headlamp controller.

[0012] Further in the present invention, the headlamp communication module is also signal - connected to the execution module to generate a configuration file with the difference structure of all zone angles and write it into the headlamp controller.

[0013] Further in the present invention, a method for automatically calibrating the ADB zone angles of a headlamp includes the following steps:

[0014] S1. The headlamp communication module is connected to the OBD of the headlamp to obtain the expected zone angle data of the headlamp and transfer the data to the control module;

[0015] S2. The control module determines the zone calibration sequence, and then the headlamp communication module communicates with the headlamp controller through the OBD via the Gateway to transfer the zone calibration sequence to the headlamp controller;

[0016] S3. The photometric screen communication module is signal - connected to the photometric screen to obtain the angle data irradiated in the actual zones of the headlamp and transfer the angle data irradiated in the actual zones of the headlamp to the execution module;

[0017] S4. The execution module determines whether the upper - lower - left - right angle deviation of the actual zone exceeds ±0.1° of the expected zone angle;

[0018] S5. If so, record the deviation angle at the corresponding position; if not, record the corresponding deviation angle as 0;

[0019] S6. The headlamp communication module generates a configuration file with the difference results of all zone angles, and writes the configuration file into the headlamp controller through the SBL via the OBD connection to the Gateway.

[0020] Further in the present invention, in step S2, the zone calibration sequence is to spread from the optical center point to both sides.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. The present invention realizes the full-automatic calibration of the ADB function partition range, avoids the operation errors caused by manual calibration, and improves the calibration accuracy.

[0023] 2. The control module of the present invention is used to determine the partition calibration sequence of the headlamp during the calibration process. It preferentially eliminates the angular error of the optical center of the whole lamp, and then gradually eliminates the partition errors on both sides, controlling the overall light angle deviation of the headlamp within a small range.

[0024] 3. The present invention realizes the communication with the headlamp controller through the headlamp communication module, obtains the expected partition angle data of the headlamp, transmits the partition calibration sequence, generates a configuration file for the difference results of all partition angles, and writes it into the headlamp controller.

[0025] 4. The present invention communicates with the light measurement screen through the light measurement screen communication module, and can obtain the irradiation angle data in the actual partition of the headlamp.

[0026] 5. The execution module of the present invention can compare the partition angles of the actual vehicle ADB function with the expected partition angles of the vehicle ADB function, and generate the difference results of the partitions.

[0027] 6. The present invention can accurately calibrate each partition of the high beam lamp and realize the anti-glare function of the ADB system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic flow chart of the present invention.

[0029] Figure 2 It is a schematic diagram of the test scenario of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1

[0032] Please refer to Figure 1 - Figure 2, the present invention provides the following technical solution: A device for automatically calibrating the partition angles of a headlight ADB, comprising a communication module, a control module, and an execution module. Among them, the communication module includes a light measurement screen communication module and a headlight communication module. The light measurement screen communication module is used to obtain the angle data of the actual illumination of the headlight, and the headlight communication module is used to obtain the expected partition angle data of the headlight, transmit the partition calibration sequence, and write the calibration result; the control module is used to determine the partition calibration sequence of the headlight during the calibration process; the execution module is used to judge whether the angle deviation of the actual partition exceeds the angle of the expected partition.

[0033] Specifically, the light measurement screen communication module is signal-connected to the light measurement screen to obtain the angle data of the actual partition illumination of the headlight.

[0034] Specifically, the light measurement screen communication module is also signal-connected to the execution module to transmit the angle data of the actual partition illumination of the headlight to the execution module.

[0035] Specifically, the headlight communication module is connected to the OBD (On-Board Diagnostics) of the headlight to obtain the expected partition angle data of the headlight.

[0036] Specifically, the headlight communication module is also signal-connected to the control module to transmit the expected partition angle data of the headlight to the control module, and transmit the partition calibration sequence determined by the control module to the headlight controller.

[0037] Specifically, the headlight communication module is also signal-connected to the execution module to generate a configuration file for the difference structure of all partition angles and write it into the headlight controller.

[0038] Embodiment 2

[0039] Specifically, combined with the general customer's requirements for the light pattern of the high beam, taking the left light optical partition design of the ADB system as an example, the following steps are included:

[0040] S1. The front headlight communication module is connected to the OBD of the front headlight to obtain the left and right angle ranges corresponding to the left headlight partition. The left and right angle ranges corresponding to the left headlight partition are: Partition 1: [-21.1°~-12.85°], Partition 2: [-19.45°~-10.8°], Partition 3: [-14.7°~-8.98°], Partition 4: [-12.84°~-6.9°], Partition 5: [-10.8°~-4.82°], Partition 6: [-8.91°~-2.78°], Partition 7: [-7.05°~-0.85°], Partition 8: [-5.19°~1.10°], Partition 9: [-3.12°~3.12°], Partition 10: [-1.05°~5.12°], Partition 11: [1.03°~-9.90°], Partition 12: [3.00°~-14.65°]. The up and down angle ranges corresponding to all partitions are: [-2.1°~6.2°]. The front headlight communication module transmits this data to the control module;

[0041] S2. The control module uses Partition 9: [-3.12°~3.12°] as the first calibrated partition, and then spreads the partitions to the left and right from Partition 9. The front headlight communication module communicates with the front headlight controller through the OBD via the Gateway, and transmits the partition calibration sequence to the front headlight controller;

[0042] S3. When calibrating Partition 9 of the left headlight, the light measurement screen communication module obtains the projection angle of this actual partition in the light measurement screen and transmits it to the execution module;

[0043] S4. The execution module determines whether the up, down, left, and right angle deviations of the actual partition exceed ±0.1° of the expected partition angle;

[0044] S5. If so, record the deviation angle at the corresponding position. If not, record the corresponding deviation angle as 0;

[0045] S6. Sequentially perform the light angle calibration of other partitions. The front headlight communication module generates a configuration file for the difference results of all partition angles, and writes the configuration file into the front headlight controller through the SBL (Secondary Bootloader, which is already disclosed in a method for refreshing an automotive controller disclosed in Chinese Patent Application No. 201310344675.3, responsible for reading data from the storage medium and loading it into the memory for execution) via the OBD connection to the Gateway.

[0046] Embodiment 3

[0047] Furthermore, in the present invention, furthermore, the method for automatically calibrating the ADB partition angle of the front headlight includes the following steps:

[0048] S1. The front headlight communication module is connected to the OBD of the front headlight to obtain the expected partition angle data of the front headlight, and transmits this data to the control module;

[0049] S2. The control module determines the partition calibration sequence, and then the front headlight communication module communicates with the front headlight controller through the OBD via the Gateway, and transmits the partition calibration sequence to the front headlight controller;

[0050] S3. The light measurement screen communication module is signal-connected to the light measurement screen to obtain the irradiation angle data in the actual partition of the front headlight, and transmits the irradiation angle data in the actual partition of the front headlight to the execution module;

[0051] S4. The execution module determines whether the upper, lower, left, and right angle deviations in the actual partition exceed ±0.1° of the expected partition angle;

[0052] S5. If so, record the deviation angle at the corresponding position, if not, record the corresponding deviation angle as 0;

[0053] S6. The front headlight communication module generates a configuration file for the difference results of all partition angles, and writes the configuration file into the front headlight controller through the SBL via the OBD connection to the Gateway.

[0054] In the present invention, the main chip model of the light measurement screen communication module is CC2430; the main chip models of the execution module and the control module are FS32K146HAT0MLL; the main chip model of the front headlight communication module is CA-IF1043DF-Q1.

[0055] Specifically, in step S2, the partition calibration sequence is to spread from the optical center point to both sides.

[0056] In summary, the present invention realizes the full-automatic calibration of the ADB function partition range, avoids the operation error caused by manual calibration, and improves the calibration accuracy; the control module of the present invention preferentially eliminates the angle error of the whole-light optical center, and then gradually eliminates the partition errors on both sides, and controls the overall light angle deviation of the front headlight within a small range; the present invention can accurately calibrate each partition of the high beam light and realize the anti-glare function of the ADB system.

[0057] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for automatically calibrating the ADB partition angle of a headlight, characterized by: It includes a communication module, a control module and an execution module, wherein: The communication module includes a light metering screen communication module and a headlight communication module. The light metering screen communication module is used to obtain the actual irradiation angle data of the headlight. The headlight communication module is used to obtain the expected partition angle data of the headlight, transmit the partition calibration sequence, and flash the calibration result. The control module is used to determine the calibration order of the headlight partitions during the calibration process; the angle error of the optical center of the whole light is eliminated first, and then the errors of the partitions on both sides are gradually eliminated, so as to control the overall light angle deviation of the headlight within a smaller range; The execution module is used to determine whether the angle deviation of the actual partition exceeds the angle of the expected partition; The light metering screen communication module is connected to the light metering screen signal to obtain the angle data of the headlight in the actual partition. The light metering screen communication module is also connected to the execution module signal to transmit the angle data of the headlight in the actual partition to the execution module; The implementation method of the above device comprises the following steps: S1, the headlight communication module is connected to the OBD of the headlight, obtains the expected partition angle data of the headlight, and transmits the data to the control module; S2, the control module determines the partition calibration sequence, and transmits the partition calibration sequence to the headlamp controller through the headlamp communication module; S3, the light metering screen communication module is connected to the light metering screen signal to obtain the angle data of the headlight in the actual partition, and transmit the angle data of the headlight in the actual partition to the execution module; S4, the execution module determines whether the actual partition angle deviation exceeds ±0.1° of the expected partition angle; S5. If yes, record the corresponding position deviation angle; if no, record the corresponding deviation angle as 0; S6. The headlight communication module generates a configuration file based on the difference results of all partition angles and writes the configuration file into the headlight controller.

2. The device for automatically calibrating the ADB partition angle of a headlight according to claim 1, characterized in that: The headlight communication module is connected to the OBD of the headlight to obtain the expected partition angle data of the headlight.

3. The device for automatically calibrating the ADB partition angle of a headlight according to claim 2, characterized in that: The headlight communication module is also connected to the control module signal to transmit the expected partition angle data of the headlight to the control module, and transmit the partition calibration sequence determined by the control module to the headlight controller.

4. The device for automatically calibrating the ADB partition angle of a headlight according to claim 2, characterized in that: The headlight communication module is also connected to the execution module signal to generate a configuration file of the difference structure of all partition angles and write it into the headlight controller.

5. The device for automatically calibrating the ADB partition angle of a headlight according to claim 1, characterized in that: In S2, the headlight communication module communicates with the headlight controller via the OBD via the Gateway.

6. The device for automatically calibrating the ADB partition angle of a headlight according to claim 1, characterized in that: In S2, the partition calibration order is to diffuse from the optical center point to both sides.

7. The device for automatically calibrating the ADB partition angle of a headlight according to claim 1, characterized in that: In S6, the headlight communication module is connected to the Gateway via the SBL via the OBD, and the configuration file is written into the headlight controller.

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