Headlamp integrated with laser radar
By splitting the LiDAR into a transceiver module and a control module, and optimizing the field of view design, the problem of insufficient space for integrating the LiDAR with the headlights is solved, thereby reducing the size and power consumption of the LiDAR and maximizing the point cloud performance, making it suitable for multi-LiDAR configurations.
Patent Information
- Application Number
- CN202520213884.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-02-11
AI Technical Summary
In existing technologies, the integration of lidar with headlights suffers from insufficient space, leading to design challenges and impacting performance. Furthermore, existing single-function integration solutions have limited effectiveness.
The lidar is split into a lidar transceiver module and a control module. The lidar transceiver module is located inside the headlight cavity, while the control module is located externally. By sharing a single control module, the field of view design is optimized to reduce the size and power consumption of the lidar.
It alleviates the problem of limited internal space in the headlights, reduces the size and power consumption of the LiDAR, and maximizes the reproduction of the LiDAR's point cloud performance, making it suitable for integrated solutions with multiple LiDAR configurations.
Smart Images
Figure CN223595856U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a front headlamp integrated with laser radar and belongs to the technical field of automobile lighting. BACKGROUND
[0002] At present, laser radar detects the position and reflectivity of targets by emitting laser and receiving echo, provides high-precision environment perception for vehicles, and improves the safety redundancy of automatic driving, laser radar is usually installed on the roof, front bumper, fender and other positions, which brings differences in appearance structure to vehicles with different configurations, increases cost and affects overall appearance. The front headlamp has the characteristics of dustproof, waterproof and light transmission, and sometimes is combined with a cleaning system, the front headlamp integrated with laser radar has inherent advantages, but the space in the front headlamp cavity is compact, and integrating laser radar in the front headlamp cavity increases the design burden. In order to alleviate the problem of insufficient space, the laser radar is usually integrated with high beam or low beam for single function, or integrated with adaptive high beam for double or multi-function beam.
[0003] In the prior art, single-function integration of high beam and low beam has limited effect on alleviating the problem of insufficient space for integrating laser radar in the front headlamp, and the front headlamp usually includes auxiliary lamp, projection lamp, corner lamp, turn signal lamp and other functions, as well as heat sink, drive, light adjustment part, bracket, decorative ring and other parts. Further compressing the space of the front headlamp not only causes design difficulties, but also affects its performance to some extent, therefore, the root of the problem is to reduce the size of the laser radar itself. SUMMARY
[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, provide a front headlamp integrated with laser radar, alleviate the integration problem caused by the compact space in the front headlamp, reduce the power consumption of the laser radar integrated in the front headlamp cavity to some extent, and is more suitable for multi-laser radar configuration integration scheme, and also restores the point cloud performance of the laser radar to the greatest extent.
[0005] To solve the above technical problems, the technical scheme of the utility model is:
[0006] The utility model provides a front headlamp integrated with laser radar, and is characterized by comprising a shell, a lampshade, a car lamp assembly, a laser radar transceiver module and a laser radar control module.
[0007] The lampshade is connected with the shell, a headlamp cavity is arranged between the shell and the lampshade, the headlamp cavity comprises a first cavity and a second cavity which are in communication with each other, the second cavity is located above the side of the first cavity, the vehicle lamp assembly is arranged in the first cavity, the laser radar transceiver module is arranged in the second cavity, and the laser radar control module is arranged outside the headlamp cavity.
[0008] The lampshade comprises a lampshade arc surface part and a lampshade plane part, the coverage of the left side field angle of the laser radar transceiver module is located on the lampshade arc surface part, and the coverage of the right side field angle of the laser radar transceiver module is located on the lampshade plane part.
[0009] Further, the laser radar transceiver module comprises a laser driver and a laser radar transceiver module;
[0010] The input end of the laser radar control module receives a radar control signal of the vehicle body, the laser radar control module communicates with the laser driver, and the output end of the laser driver is connected with the input end of the laser radar transceiver module.
[0011] The laser radar transceiver module is used for transmitting radar laser and receiving laser echo.
[0012] Further, the laser radar transceiver module comprises a laser radar transmitting module and a laser radar receiving module;
[0013] The laser radar transmitting module is used for transmitting radar laser, and the laser radar receiving module is used for receiving laser echo.
[0014] Further, the laser radar transceiver module further comprises an optical filter, and the optical filter is used for filtering the wave band of the radar laser echo.
[0015] Further, an outer surface of the lampshade is provided with a coating layer.
[0016] Further, the vehicle lamp assembly comprises a headlamp controller, a headlamp driver and an LED lamp group.
[0017] The input end of the headlamp controller receives a light control signal of the vehicle body, the output end of the headlamp controller is connected with the input end of the headlamp driver, and the output end of the headlamp driver is connected with the LED lamp group.
[0018] Further, the LED lamp group comprises a high beam lamp, an auxiliary lamp, a projection lamp, an angle lamp and a turn signal lamp.
[0019] Further, a heat sink is further arranged, and the heat sink is used for dissipating heat of the vehicle lamp assembly and the laser radar transceiver module.
[0020] Further, the power module is further included, and the power module supplies power for the LED lamp set and the laser radar transceiver module.
[0021] Further, the light adjusting component, the support and the decorative ring are further included.
[0022] By adopting the technical scheme, the utility model has the following beneficial effects:
[0023] The laser radar is split into the laser radar transceiver module and the laser radar control module, the laser radar control module is arranged outside the headlamp cavity, the laser radar transceiver module is arranged inside the headlamp cavity, communication is carried out between the laser radar transceiver module and the laser radar control module, the size of the laser radar integrated in the headlamp cavity is reduced by splitting the laser radar, the integrated difficulty caused by the compact internal space of the headlamp is alleviated, the power consumption of the laser radar integrated in the headlamp cavity is reduced to a certain extent, meanwhile, a plurality of laser radar transceiver modules share one laser radar control module, which is more suitable for the integrated scheme of multiple laser radars. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is the overall structural drawing of the utility model's integrated laser radar headlamp;
[0025] Figure 2 It is the lampshade and cavity structure drawing of the utility model's integrated laser radar headlamp;
[0026] Figure 3 It is the system block diagram of the utility model's integrated laser radar headlamp;
[0027] Figure 4 It is the laser radar field of view angle schematic drawing of the utility model;
[0028] Figure 5 It is the laser radar left side large angle laser emission incidence angle schematic drawing of the utility model;
[0029] Figure 6 It is the laser radar right side large angle laser emission incidence angle schematic drawing of the utility model;
[0030] Figure 7 It is the double laser radar field of view area schematic drawing of the utility model. DETAILED DESCRIPTION
[0031] In order to make the content of the utility model more easily be clearly understood, the following according to specific embodiment and combining with the drawings, the utility model is further explained in detail.
[0032] Embodiment one
[0033] As Figure 1 And 2 The embodiment provides a front lamp integrated with laser radar, which comprises a shell 1, a lampshade 2, a car lamp assembly, a laser radar transceiving module 4 and a laser radar control module 5.
[0034] The lampshade 2 is connected with the shell 1, and a front lamp cavity 6 is arranged between the shell 1 and the lampshade 2; the front lamp cavity 6 comprises a first cavity 61 and a second cavity 62 which are in communication with each other; the second cavity 62 is located above the side of the first cavity 61; the car lamp assembly is arranged in the first cavity 61; the laser radar transceiving module 4 is arranged in the second cavity 62; and the laser radar control module 5 is arranged outside the front lamp cavity 6.
[0035] Specifically, by splitting the laser radar, the size of the laser radar integrated in the front lamp cavity 6 can be reduced, and the laser radar control module 5 arranged outside the front lamp cavity 6 is no longer limited by the space of the front lamp, thereby relieving the problem of insufficient space for integrating the laser radar in the front lamp, and at the same time, the power consumption of the laser radar integrated in the front lamp cavity 6 is also reduced to a certain extent.
[0036] In addition, the size of the field of view angle is an important indicator for measuring the performance of the laser radar point cloud; when the laser radar is integrated in the front lamp, not only the space problem needs to be considered, but also the problem of the field of view angle shielding of the laser radar needs to be considered. Figure 4 As shown in the figure, when the laser radar transceiving module 4 is in the position 4a, the field of view angle can be completely hit outside the front lamp cavity 6, and when the laser radar transceiving module 4 is in the position 4b, since the field of view angle is in a divergent state, part of the right side laser will pass through the inside of the front lamp cavity 6 and hit other components in the front lamp cavity 6, causing the shielding of the field of view angle of the laser radar, so that the effective target cannot be detected, and at the same time, noise points are also generated to a certain extent. In addition, it should be emphasized that the laser radar transceiving module 4 should be as close to the lampshade 2 as possible to avoid the increase of the distance of the laser passing through the front lamp cavity 6, which leads to the shielding of the field of view angle of the laser radar and the increase of noise points.
[0037] As Figure 2 The lampshade 2 of the embodiment comprises a lampshade arc surface part 21 and a lampshade plane part 22; the coverage of the left side field of view angle of the laser radar transceiving module 4 is located on the lampshade arc surface part 21; and the coverage of the right side field of view angle of the laser radar transceiving module 4 is located on the lampshade plane part 22.
[0038] Specifically, the laser radar detects targets by laser detection, and the detection performance is directly determined by the laser output power. Therefore, the transmittance of the lampshade 2 is also one of the measurement factors. Generally, the light transmittance will decrease a lot after a certain incident angle, such as Figure 5 As shown in the left side of FIG. 6, taking the large-angle laser emission on the left side as an example, the lampshade surface 21a is a curved surface. When the laser is emitted at a large angle, the angle a1 between the emitted laser and the tangent of the curved surface of the lampshade surface 21a is 90°, that is, the incident angle is 0°. At this time, the laser transmittance is relatively large. The lampshade surface 21b is a flat surface. When the laser is emitted at a large angle, the angle between the emitted laser and the tangent of the lampshade surface 21b is small, that is, the incident angle a2 is large. At this time, the laser transmittance is relatively small, which will affect the detection performance of the laser radar in a large-angle range. Therefore, the lampshade surface covered by the left field of view angle of the laser radar transceiver module 4 needs to be designed as a curved surface.
[0039] In addition, the laser radar needs to be angle calibrated before leaving the factory, and the angle deviation of the emitted laser should also be strictly controlled. Generally, the laser will deviate after passing through the curved outer lens. Therefore, the influence of the laser transmittance and the emitted angle deviation needs to be balanced, such as Figure 6 As shown in the right side of FIG. 6, taking the large-angle laser emission on the right side as an example, the lampshade surface 22a is a flat surface, and the lampshade surface 22b is an arc surface inclined to the right and upward. The lampshade surface 22b is generally a design scheme of the existing lampshade surface. The incident angle b2 of the emitted laser of the lampshade surface 22b is larger than the incident angle b1 of the emitted laser of the lampshade surface 22a. Therefore, the lampshade surface covered by the right field of view angle of the laser radar transceiver module 4 is designed as a flat surface, which can increase the transmittance of the laser in this area to a certain extent and affect the emitted angle deviation to a lesser extent. In summary, the lampshade 2 can be designed as shown in FIG. 7, so as to maximize the point cloud performance of the laser radar. Figure 1
[0040] It is worth noting that the laser radar embodies the target information in the form of point cloud, and the number of lasers sent by a single laser radar is limited. The number of point clouds obtained may not meet the processing needs of the subsequent perception and positioning level. Therefore, one laser radar transceiver module 4 is integrated in each of the left and right headlamps, and the two laser radar transceiver modules 4 share one laser radar control module 5. The laser radar control module 5 collects the point cloud data of the two laser radar transceiver modules 4 at the same time, which can increase the density of the point cloud in a certain field of view area, so as to perceive the target more accurately, such as Figure 7 As shown in FIG. 8, 4A and 4B are the field of view angles of the left and right laser radar transceiver modules 4, respectively. The overlapping of the two field of view angles can increase the point cloud density in the overlapping field of view area, such as Figure 7 As shown by the arrows in FIG. 9, increasing the point cloud density in the front of the vehicle can further improve the perception accuracy, thereby improving the safety factor of automatic driving. By sharing the laser radar control module 5, the size of the laser radar can be further reduced, which is more suitable for the integrated scheme of multiple laser radars.
[0041] As Figure 1 and 3 shown, the laser radar transceiver module 4 of the embodiment includes a laser driver 41 and a laser radar transceiver module 42;
[0042] The input end of the laser radar control module 5 receives the radar control signal of the vehicle body, the laser radar control module 5 performs Ethernet communication with the laser driver 41, and the output end of the laser driver 41 is connected to the input end of the laser radar transceiver module 42;
[0043] The laser radar transceiver module 42 is used for transmitting radar laser and receiving laser echo.
[0044] As Figure 3 shown, the laser radar transceiver module 42 of the embodiment includes a laser radar transmitting module and a laser radar receiving module;
[0045] The laser radar transmitting module is used for transmitting radar laser, and the laser radar receiving module is used for receiving laser echo.
[0046] As Figure 1 shown, in order to improve the effectiveness of the laser radar receiving signal, the laser radar transceiver module 4 of the embodiment further includes a filter 43, which is used for waveband filtering of the radar laser echo.
[0047] As Figure 1 and 3 shown, the vehicle lamp assembly of the embodiment includes a headlamp controller 31, a headlamp driver 32 and an LED lamp group 33;
[0048] The input end of the headlamp controller 31 receives the light control signal of the vehicle body, the output end of the headlamp controller 31 is connected to the input end of the headlamp driver 32, and the output end of the headlamp driver 32 is connected to the LED lamp group 33.
[0049] As Figure 1 and 3 shown, the LED lamp group 33 of the embodiment includes a high beam and low beam lamp 331, an auxiliary lamp 332, a projection lamp, an angle lamp and a turn signal lamp, only the basic function of the headlamp is shown in the figure, and the projection lamp, the angle lamp and the turn signal lamp are not drawn, and the high beam and low beam lamp 331 and the auxiliary lamp 332 can realize the functions of light switching, high beam and low beam adjustment, etc.
[0050] As Figure 1 and 3 shown, the headlamp of the embodiment further includes a heat sink 7, which is used for heat dissipation of the vehicle lamp assembly and the laser radar transceiver module 4, so as to ensure the normal working temperature of the headlamp and the laser radar.
[0051] AsFigure 1 and 3 As shown in the figure, the headlamp of the embodiment further comprises a power module 8, which supplies power to the LED lamp group 33 and the laser radar transceiver module 4.
[0052] The headlamp of the embodiment further comprises a light adjusting component, a support and a bezel, which are not shown in the figure and only the basic function of the headlamp is schematically shown.
[0053] Embodiment two
[0054] The embodiment provides another way to improve the effectiveness of the laser radar received signal, and a coating layer is arranged on the outer surface of the lampshade 2, and the material of the coating layer can be silicon, which can enhance the transmittance of the corresponding required waveband laser and reduce the interference of other wavebands.
[0055] The working principle of the utility model is as follows:
[0056] The headlamp controller 31 controls the high beam and low beam 331, the auxiliary lamp 332 and the radiator 7 through the headlamp drive 32, the laser radar control module 5 arranged outside the headlamp cavity 6 controls the laser radar emission module to emit laser through the laser drive 41, and receives the echo through the laser radar receiving module, the laser radar control module 5 processes the echo and generates a point cloud with three-dimensional coordinates, reflectivity and other information, then clusters the point cloud to generate a target object with position, size, orientation angle and other information, so as to realize the application in the perception and positioning level.
[0057] The laser radar is split into the laser radar transceiver module 4 and the laser radar control module 5, the laser radar control module 5 is arranged outside the headlamp cavity 6, the laser radar transceiver module 4 is arranged inside the headlamp cavity 6, and the laser radar transceiver module 4 and the laser radar control module 5 communicate, by splitting the laser radar, the size of the laser radar integrated in the headlamp cavity 6 is reduced, the integration difficulty caused by the compact internal space of the headlamp is relieved, and the power consumption of the laser radar integrated in the headlamp cavity 6 is reduced to a certain extent, at the same time, the plurality of laser radar transceiver modules 4 share one laser radar control module 5, which is more suitable for the integration scheme of multiple laser radar configurations. In addition, the lampshade surface covered by the left field angle of the laser radar transceiver module 4 is arranged as an arc surface, and the lampshade surface covered by the right field angle of the laser radar transceiver module 4 is arranged as a plane, so as to reduce the attenuation of the laser radar point cloud performance caused by being integrated in the headlamp cavity 6, and the point cloud performance of the laser radar is restored to the maximum extent.
[0058] The above-described specific embodiments further specifically describe the technical problems, technical solutions and beneficial effects solved by the present application, and it should be understood that the above-described specific embodiments are merely specific embodiments of the present application and are not used to limit the present application, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A headlight integrating lidar, characterized in that: It includes a shell (1), a lampshade (2), a vehicle lamp assembly, a laser radar transceiver module (4) and a laser radar control module (5); The lampshade (2) is connected with the shell (1), and a headlamp cavity (6) is arranged between the shell (1) and the lampshade (2), the headlamp cavity (6) comprises a first cavity (61) and a second cavity (62) which are in communication with each other, the second cavity (62) is located above the side of the first cavity (61), the vehicle lamp assembly is arranged in the first cavity (61), the laser radar transceiver module (4) is arranged in the second cavity (62), and the laser radar control module (5) is arranged outside the headlamp cavity (6). The lampshade (2) comprises a lampshade arc surface part (21) and a lampshade plane part (22), a coverage area of a left side field angle of the laser radar transceiver module (4) is located on the lampshade arc surface part (21), and a coverage area of a right side field angle of the laser radar transceiver module (4) is located on the lampshade plane part (22).
2. The headlamp integrated lidar according to claim 1, characterized in that, The laser radar transceiver module (4) comprises a laser driver (41) and a laser radar transceiver module (42); An input end of the laser radar control module (5) receives a radar control signal of a vehicle body, the laser radar control module (5) communicates with the laser driver (41), and an output end of the laser driver (41) is connected with an input end of the laser radar transceiver module (42). The laser radar transceiver module (42) is used for transmitting radar laser and receiving laser echo.
3. The headlamp integrating a lidar according to claim 2, characterized in that, The laser radar transceiver module (42) comprises a laser radar transmitting module and a laser radar receiving module. The laser radar transmitting module is used for transmitting radar laser, and the laser radar receiving module is used for receiving laser echo.
4. The headlamp integrated lidar of claim 3, wherein, The laser radar transceiver module (4) further comprises a filter (43), and the filter (43) is used for filtering a wave band of radar laser echo.
5. The headlamp integrated lidar of claim 3, wherein, An outer surface of the lampshade (2) is provided with a coating layer.
6. The headlamp integrating a lidar according to claim 3, characterized in that, The vehicle lamp assembly comprises a headlamp controller (31), a headlamp driver (32) and an LED lamp group (33). An input end of the headlamp controller (31) receives a light control signal of the vehicle body, an output end of the headlamp controller (31) is connected with an input end of the headlamp driver (32), and an output end of the headlamp driver (32) is connected with the LED lamp group (33).
7. The headlamp integrated lidar of claim 6, wherein, The LED lamp group (33) comprises high beam and low beam lamps (331), auxiliary lamps (332), projection lamps, corner lamps and turn signal lamps.
8. The headlamp integrated lidar of claim 7, wherein, A radiator (7) is further arranged, and the radiator (7) is used for radiating heat of the vehicle lamp assembly and the laser radar transceiver module (4).
9. The headlamp integrating a lidar according to claim 8, characterized in that, A power module (8) is further arranged, and the power module (8) supplies power for the LED lamp group (33) and the laser radar transceiver module (4).
10. The headlamp integrating a lidar according to claim 9, characterized in that, A light adjusting part, a support and a decorative ring are further arranged.