A laser radar lens automatic focusing device facilitating long-distance detection
The automatic focusing device for LiDAR lenses, which incorporates a distance reduction calibration structure and adjustment module, solves the problems of time-consuming and bulky traditional manual focusing. It achieves automated focusing for long-distance detection, improving efficiency and accuracy, and optimizing the integration and portability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UNIONMANTECH
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-28
AI Technical Summary
Traditional lidar lens assembly focal length adjustment methods are mostly manual operations, lacking external auxiliary equipment for precise testing, resulting in a time-consuming and inefficient adjustment process; for long-distance focusing applications, traditional equipment is bulky, which is not conducive to equipment integration and portability.
Design an automatic focusing device for a LiDAR lens, including a zoom calibration structure, a camera module, and an adjustment module. By repeatedly changing the angle and number of the optical path and reflectors, and combining this with the camera module to automatically identify the clarity of the light spot, automatic focusing is achieved.
It achieves automated focusing for long-distance detection, shortens the detection distance, improves focusing efficiency and accuracy, and optimizes the space utilization and portability of the equipment.
Smart Images
Figure CN224569267U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lidar focusing technology, and in particular to an automatic focusing device for lidar lenses that facilitates long-distance detection. Background Technology
[0002] The lidar lens is the core optical component of a lidar system, and its design directly affects detection accuracy, field of view, and anti-interference capability. Therefore, the focusing process of the lidar lens is particularly important.
[0003] Traditional LiDAR lens assembly focal length adjustment methods are mostly manual operations, lacking external auxiliary equipment for precise testing, resulting in time-consuming and inefficient adjustment processes. In addition, for application scenarios requiring long-distance (more than 12 meters) focusing, traditional equipment is often bulky and occupies a lot of space, which is not conducive to the integration and portability of the equipment.
[0004] Therefore, this utility model proposes an automatic focusing device for lidar lenses that facilitates long-distance detection. Utility Model Content
[0005] The utility model of this invention provides an automatic focusing device for LiDAR lenses that facilitates long-distance detection. It mainly solves the problem that the traditional LiDAR lens group focal length adjustment method is mostly manual operation, lacks external auxiliary equipment for accurate testing, resulting in a time-consuming and inefficient adjustment process. In addition, for application scenarios that require long-distance focusing, traditional devices are often bulky and occupy a lot of space, which is not conducive to the integration and portability of the device.
[0006] This utility model proposes an automatic focusing device for lidar lenses that facilitates long-distance detection, comprising:
[0007] A range reduction calibration structure is disposed on the illumination path of the radar under test; the range reduction calibration structure projects a light spot by changing the illumination path emitted by the radar under test at least once.
[0008] The camera module is positioned facing the zoom calibration structure;
[0009] An adjustment module is positioned toward the radar under test and is used to adjust the focal length of the radar under test.
[0010] Preferably, the reduction calibration structure includes:
[0011] There is at least one reflector, which is inclined; any one of the reflectors is disposed on the light path of the radar to be detected, and forms a reflected light path to reflect outward along the incident light path;
[0012] The calibration plate is unique in number; the calibration plate is located on the primary reflection path of the radar under test, or on the secondary and multiple reflection paths; the calibration plate receives and reflects laser light;
[0013] The camera module is positioned facing either of the reflectors of the zoom calibration structure.
[0014] Preferably, the reflector includes a first reflector that receives the emitted laser light from the radar under test, and the first reflector and the radar under test are located on the same horizontal plane;
[0015] The camera module is positioned facing the first reflector.
[0016] Preferably, the first reflector receives the horizontally incident light emitted by the laser to be detected and reflects it to form vertically reflected light;
[0017] The remaining reflectors of the reduced-spacing calibration structure receive horizontal or vertical incident light and reflect it to form vertical or horizontal reflected light until it is reflected back to the calibration plate.
[0018] Preferably, the distance reduction calibration structure further includes:
[0019] The first slide rail is arranged in a direction parallel to the light path of the radar to be detected;
[0020] The second slide rail is perpendicular to the length direction of the first slide rail; the reflector can slide along the length direction of the second slide rail.
[0021] Preferably, there are two sets of the second slide rails, and the two sets of the second slide rails are distributed in parallel on the first slide rail, and any one of the second slide rails can slide along the length direction of the first slide rail;
[0022] All of the aforementioned reflectors are distributed on the two sets of the second slide rails.
[0023] Preferably, any group of second slide rails includes two second slide rails; the two ends of any one of the reflectors are respectively disposed on the two second slide rails of the same group;
[0024] The first slide rail has a frame-shaped structure, and two second slide rails located in the same group are slidably disposed on the symmetrical side of the first slide rail.
[0025] Preferably, the adjustment module includes:
[0026] The gripping structure grips the radar to be tested, which is placed flat on the worktable;
[0027] A motor is fixedly connected to the gripping structure and controls the movement of the gripping structure in the vertical direction;
[0028] A three-axis controller is fixedly connected to the motor and controls the motor to move horizontally, vertically, and forward / backward.
[0029] Preferably, it further includes:
[0030] A curing structure is raised on the workbench, and the light illumination range of the curing structure covers the surface of the workbench.
[0031] As can be seen from the above, the following beneficial effects can be obtained by applying the technical solution provided by this utility model:
[0032] First, the automatic focusing device for laser radar lenses proposed in this utility model has a distance reduction calibration structure that can change the optical path multiple times, which shortens the detection distance of a long distance such as 12 meters to a smaller distance, while still meeting the length requirements of the detection distance and optimizing space utilization.
[0033] Secondly, the automatic focusing device for laser radar lenses proposed in this utility model can adapt to different detection distance requirements by adjusting the angle and number of reflectors, making the automatic focusing device more widely applicable;
[0034] Third, the automatic focusing device for lidar lenses proposed in this utility model can conveniently set the distance, angle and number of reflectors by setting the first slide rail and the second slide rail. When changing different lidar lenses for detection, the detection distance can be quickly adjusted and the accuracy of the detection results can be guaranteed.
[0035] Fourth, in the automatic focusing device for lidar lenses proposed in this utility model, the camera module automatically identifies the clarity of the light spot on the reflector and automatically adjusts the lidar lens through the adjustment structure, which can greatly improve the automation level of lidar lens focusing and improve detection efficiency and accuracy. Attached Figure Description
[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0037] Figure 1 This is a schematic diagram of the automatic focusing device in an embodiment of the present invention;
[0038] Figure 2 This is a schematic diagram of laser reflection on the zoom calibration structure of the automatic focusing device in this embodiment of the present invention;
[0039] Figure 3 This is a schematic diagram of the distance reduction calibration structure of the automatic focusing device in this embodiment of the present invention;
[0040] Figure 4 This is a schematic diagram of the structure of the adjustment module of the automatic focusing device in this embodiment of the present invention. Detailed Implementation
[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0042] Traditional LiDAR lens assembly focal length adjustment methods are mostly manual operations, lacking external auxiliary equipment for precise testing, resulting in time-consuming and inefficient adjustment processes. In addition, for applications requiring long-distance focusing, traditional equipment is often bulky and takes up a lot of space, which is not conducive to the integration and portability of the equipment.
[0043] like Figures 1-4 As shown, to solve the above problems, this embodiment proposes an automatic focusing device for a lidar lens that facilitates long-distance detection, including a zoom calibration structure 10, a camera module 20, and an adjustment module 30; wherein, the zoom calibration structure 10 is disposed on the illumination path of the lidar to be detected; the zoom calibration structure 10 projects a light spot after changing the illumination path emitted by the lidar to be detected at least once; the camera module 20 is disposed facing the zoom calibration structure 10; the adjustment module 30 is disposed facing the lidar to be detected and is used to adjust the focal length of the lidar to be detected.
[0044] Preferably, in this embodiment, the radar to be detected is set on a workbench, and the distance reduction calibration structure 10 is set on one side of the workbench, and the camera module 20 is set on the side of the workbench facing the distance reduction calibration structure 10.
[0045] Preferably, in this embodiment, the camera module 20 includes a camera.
[0046] Preferably, this embodiment also includes a controller, which is electrically connected to the camera module 20, the adjustment module 30, and the zoom calibration structure 10. The controller receives the detection distance transmitted from the outside and controls the zoom calibration structure 10 to adjust to the required detection distance. The lidar emits a laser, and the camera module 20 captures and analyzes the light spot on the zoom calibration structure 10. The controller determines whether focal length adjustment is required. If so, it controls the adjustment module 30 to adjust according to the preset adjustment rules. Otherwise, it is considered that the lidar lens has completed focusing and subsequent processes can proceed.
[0047] In this embodiment, by setting the shortening calibration structure 10, the actual detection distance, such as 12 meters, can be shortened by means of mirror reflection, etc., which optimizes the space utilization of the focusing equipment, while ensuring its effective application for long-distance detection focal length, and improves the integration and portability of the equipment.
[0048] More specifically, the reduced-range calibration structure 10 includes at least one reflector 11 and a unique number of calibration plates 12; the at least one reflector 11 is inclined and located on the illumination path of the radar under test, and reflects outward along the incident light path to form a reflected light path; the calibration plate 12 is located on the primary reflection path of the radar under test, or on the secondary and multiple reflection paths; the calibration plate 12 receives and reflects laser light; the camera module 20 is positioned toward any of the reflectors 11 of the reduced-range calibration structure 10.
[0049] Preferably, in this embodiment, the reflector 11 is a mirror panel, and the angle of the mirror panel is adjustable, that is, the user can select the corresponding angle and the number of mirror panels according to the actual detection distance.
[0050] Preferably, in this embodiment, the calibration plate 12 is a white calibration plate 12.
[0051] In this embodiment, the camera module 20 acquires the specular spot of any reflector 11 on the zoom calibration structure 10 and identifies the clarity of the specular spot to determine whether the focal length is within the range.
[0052] More specifically, the reflector 11 includes a first reflector 11 that receives the emitted laser from the radar under test, and the first reflector 11 and the radar under test are located on the same horizontal plane; the camera module 20 is disposed facing the first reflector 11.
[0053] Preferably, in this embodiment, the radar to be tested is disposed on the table surface of the workbench, so the horizontal plane of the first reflector 11 is basically at the same height as the table surface. Preferably, but not limited to, the workbench is a fixed structure, and the combination of the camera module 20 and the workbench is also a fixed structure. Therefore, the camera module 20 being positioned towards the first reflector 11 can effectively ensure that the specular spot acquired by the camera module 20 is a laser spot that can truly reflect the radar to be tested, thus ensuring the accuracy of the automatic focusing equipment.
[0054] Preferably, the first reflector 11 receives horizontal incident light emitted by the radar to be detected and reflects it to form vertical reflected light; the remaining reflectors 11 of the reduced-range calibration structure 10 receive horizontal or vertical incident light and reflect it to form vertical or horizontal reflected light until it is reflected to the calibration plate 12. Preferably, but not limited to, in this embodiment, the first reflector 11 is located at the highest point of the reduced-range calibration structure 10 and is inclined downward, so that the incident light is reflected to form vertically downward reflected light, thereby controlling the overall height of the reduced-range calibration structure 10.
[0055] Preferably, in this embodiment, the first reflector 11 is set at a 45° tilt angle so that the horizontal incident light can be reflected to form vertical reflected light. The other reflectors 11 are also set at 45° and 135° angles, respectively, so that long-distance detection can be achieved by the sum of the horizontal and vertical reflection distances.
[0056] More specifically, the distance reduction calibration structure 10 also includes a first slide rail 13 and a second slide rail 14; the first slide rail 13 is arranged in a direction parallel to the illumination path of the radar to be detected; the second slide rail 14 is arranged in a direction perpendicular to the length direction of the first slide rail 13; the reflector 11 can be slidably arranged along the length direction of the second slide rail 14.
[0057] Preferably, in this embodiment, there are two sets of second slide rails 14, and the two sets of second slide rails 14 are distributed parallel to the first slide rail 13, and any second slide rail 14 can slide along the length direction of the first slide rail 13; all reflectors 11 are distributed on the two sets of second slide rails 14. Preferably, but not limited to, any set of second slide rails 14 includes two second slide rails 14, and the two ends of any reflector 11 are respectively disposed on the two second slide rails 14 of the same set; the first slide rail 13 has a frame structure, and the two second slide rails 14 located in the same set are slidably disposed on the symmetrical side of the first slide rail 13.
[0058] Preferably, in this embodiment, the first slide rail 13 is placed on the ground, and the second slide rail 14 is vertically arranged on the first slide rail 13. The length of the second slide rail 14 is at least equal to the height of the worktable, to ensure that the reflector 11 on the second slide rail 14 and the radar to be detected on the worktable are located on the same plane. Preferably, but not limited to, one end of the first slide rail 13 is set to abut against the worktable, further optimizing the space occupied by the automatic focusing equipment.
[0059] Preferably, in this embodiment, the groove of the first slide rail 13 is provided at the top, and the bottom end of the second slide rail 14 is slidably disposed in the groove of the first slide rail 13; the groove of the second slide rail 14 is provided on the opposing end surfaces of the two second slide rails 14, and the end of the reflector 11 is slidably disposed in the groove of the second slide rail 14.
[0060] Preferably, in this embodiment, two sliders are respectively provided at each end of the reflector 11, and the two sliders are arranged corresponding to the two parallel slide rails on the second slide rail 14. In this embodiment, if the two ends of the reflector 11 slide respectively, the tilt direction of the reflector 11 can be adjusted; if the two sliders at either end of the reflector 11 slide respectively, the tilt angle of the reflector 11 can be adjusted.
[0061] Preferably, in this embodiment, the two ends of the calibration plate 12 can be fixed on the second slide rail 14, or the calibration plate 12 can be fixed to the ground by fasteners.
[0062] In this embodiment, the distance reduction calibration structure 10, through the arrangement of the first slide rail 13 and the second slide rail 14, makes it easier to adjust the angle, distance, and quantity of the reflector 11, and enables the automatic focusing device to meet the focusing distance requirements of different radars to be detected.
[0063] More specifically, the adjustment module 30 includes a gripping structure 31, a motor 32, and a three-axis controller 33; the gripping structure 31 grips the radar to be tested that is placed flat on the worktable; the motor 32 is fixedly connected to the gripping structure 31 and controls the movement of the gripping structure 31 in the vertical direction; the three-axis controller 33 is fixedly connected to the motor 32 and controls the movement of the motor 32 in the horizontal, vertical, and forward / backward directions.
[0064] Preferably, in this embodiment, the motor 32 drives the gripping structure 31 to perform pick-up, placement, and fine-tuning operations. In this embodiment, if the camera module 20 determines that the current mirror light plate is out of focus, the gripping structure 31 controls the fine-tuning, and the camera module 20 continuously acquires the mirror light spot until the mirror light plate is clear. At this point, the radar to be detected is confirmed to have completed the adjustment, so as to proceed with the subsequent process.
[0065] Preferably, in this embodiment, the three-axis controller 33 includes a horizontal control motor 32, a vertical control motor 32, and a front-to-back control motor 32, wherein the horizontal control motor 32 is preferably the base, on which the front-to-back control motor 32 and the vertical control motor 32 are respectively mounted.
[0066] Preferably, in this embodiment, the three-axis controller 33 fixes the motor 32 to the planar connector through the planar connector to realize the overall control of the planar connector, and the gripping structure 31 is set at the driving end of the motor to realize up and down movement.
[0067] Preferably, the size of the gripping structure 31 is adjustable to accommodate radars of different sizes to be tested, so as to enable the gripping structure 31 to pick up and put down the radar to be tested.
[0068] More specifically, the workbench is also provided with a raised curing structure, and the light coverage of the curing structure covers the surface of the workbench.
[0069] Preferably, the curing structure includes a curing lamp and a fixed bracket for mounting the curing lamp.
[0070] In this embodiment, after the focusing process of the radar under test by the adjustment module 30 is completed, the curing lamp is turned on to cure the lens group of the radar under test, so as to ensure the stability and accuracy of the focal length.
[0071] In summary, this embodiment proposes an automatic focusing device for LiDAR lenses that facilitates long-distance detection. It shortens the detection distance through mirror reflection within the shortening calibration structure, and achieves automatic adjustment by setting up a camera module and an adjustment module, thereby improving the automation level of LiDAR lens focusing. Under the premise of optimizing the occupied area, it improves the accuracy and efficiency of focus adjustment.
[0072] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.
Claims
1. An automatic focusing device for a lidar lens that facilitates long-distance detection, characterized in that, include: A range reduction calibration structure is disposed on the illumination path of the radar under test; the range reduction calibration structure projects a light spot by changing the illumination path emitted by the radar under test at least once. The camera module is positioned facing the zoom calibration structure; An adjustment module is positioned toward the radar under test and is used to adjust the focal length of the radar under test.
2. The automatic focusing device for a lidar lens, facilitating long-distance detection, as described in claim 1, is characterized in that... The distance reduction calibration structure includes: There is at least one reflector, which is inclined; any one of the reflectors is disposed on the light path of the radar to be detected, and forms a reflected light path to reflect outward along the incident light path; The calibration plate is unique in number; the calibration plate is located on the primary reflection path of the radar under test, or on the secondary and multiple reflection paths; the calibration plate receives and reflects laser light; The camera module is positioned facing either of the reflectors of the zoom calibration structure.
3. The automatic focusing device for a lidar lens that facilitates long-distance detection according to claim 2, characterized in that: The reflector includes a first reflector that receives the emitted laser light from the radar under test, and the first reflector and the radar under test are located on the same horizontal plane. The camera module is positioned facing the first reflector.
4. The automatic focusing device for a lidar lens that facilitates long-distance detection according to claim 3, characterized in that: The first reflector receives the horizontal incident light emitted by the radar to be detected and reflects it to form vertical reflected light; The remaining reflectors of the reduced-spacing calibration structure receive horizontal or vertical incident light and reflect it to form vertical or horizontal reflected light until it is reflected back to the calibration plate.
5. The automatic focusing device for a lidar lens, facilitating long-distance detection, as described in claim 4, is characterized in that... The distance reduction calibration structure also includes: The first slide rail is arranged in a direction parallel to the light path of the radar to be detected; The second slide rail is perpendicular to the length direction of the first slide rail; the reflector can slide along the length direction of the second slide rail.
6. The automatic focusing device for a lidar lens that facilitates long-distance detection according to claim 5, characterized in that: There are two sets of the second slide rail, and the two sets of the second slide rail are distributed in parallel on the first slide rail, and any one of the second slide rails can slide along the length direction of the first slide rail; All of the aforementioned reflectors are distributed on the two sets of the second slide rails.
7. The automatic focusing device for a lidar lens, facilitating long-distance detection, as described in claim 6, is characterized in that: Each set of second slide rails includes two second slide rails; the two ends of each of the reflectors are respectively disposed on the two second slide rails of the same set; The first slide rail has a frame-shaped structure, and two second slide rails located in the same group are slidably disposed on the symmetrical side of the first slide rail.
8. A laser radar lens autofocusing device for long-distance detection according to any one of claims 1 to 7, characterized in that, The adjustment module includes: The gripping structure grips the radar to be tested, which is placed flat on the worktable; A motor is fixedly connected to the gripping structure and controls the movement of the gripping structure in the vertical direction; A three-axis controller is fixedly connected to the motor and controls the motor to move horizontally, vertically, and forward / backward.
9. The automatic focusing device for a lidar lens, facilitating long-distance detection, as described in claim 8, is characterized in that... Also includes: A curing structure is raised on the workbench, and the light illumination range of the curing structure covers the surface of the workbench.