A novel laser radar calibration device

Abstract

The utility model relates to a new type laser radar calibration device relates to laser radar technical field for solving the problem that multiple rotating platforms need multiple rotating discs when multiple circuits are assembled simultaneously. The new type laser radar calibration device includes base, rotating platform, radar assembly and brush, the base has the inside ring surface and the outside mounting surface, the inside ring surface extends upwards and has multiple wires, the rotating platform includes the top plate, slewing bearing and rotation ring body, the top plate is fixedly arranged on the slewing bearing, the sleewing bearing is fixedly arranged on the outside mounting surface of the base, so that the rotating platform and the base can relatively rotate around the axis of the slewing bearing, the radar assembly is arranged on the rotating platform, the brush includes fixed casing and multiple conductive bodies, the fixed casing is fixedly connected with the base, the multiple conductive bodies are independently distributed in the fixed casing, one end of the wire and the corresponding conductive body is fixedly connected, the other end of the conductive body penetrates the fixed casing and forms the protrusion.

Description

Technical Field

[0001] This application relates to the field of lidar technology, and in particular to a novel lidar calibration device. Background Technology

[0002] LiDAR, as an important environmental perception sensor, is widely used in fields such as autonomous driving, robot navigation, and surveying. To ensure that LiDAR can accurately measure the distance and angle information of target objects, it needs to be precisely calibrated.

[0003] The lidar includes a base, a rotating platform, a target system, and a laser emitting and receiving system. The laser emitting and receiving system and the target system are fixedly connected to the base via the rotating platform, and can rotate 360° on the base via the rotating platform.

[0004] The battery is usually housed inside the base, so the rotating platform typically has a built-in rotating power supply disk, which is electrically connected to the base via brushes to achieve sliding power supply. However, the overall metal material of the turntable is not conducive to the laying of cables. When multiple sets of cables are required, multiple coaxial power supply rings need to be installed, which is quite troublesome to manufacture and install. Utility Model Content

[0005] This application provides a novel lidar calibration device to solve the problem of needing multiple turntables to simultaneously assemble multiple circuits within a rotating platform.

[0006] This application provides a novel lidar calibration device, including a base, a rotating platform, a radar assembly, and brushes. The base has an inner annular surface and an outer mounting surface, with multiple wires extending upward from the inner annular surface. The rotating platform includes a top plate, a slewing bearing, and a rotating ring. The top plate is fixedly mounted on the slewing bearing, which is fixedly mounted on the outer mounting surface of the base, allowing the rotating platform and the base to rotate relative to each other around the axis of the slewing bearing. The radar assembly is mounted on the rotating platform. The brushes include a fixed housing and multiple conductors. The fixed housing is fixedly connected to the base, and the multiple conductors are independently distributed within the fixed housing. Multiple wires correspond one-to-one with multiple conductors. One end of the conductor is fixedly connected, and the other end of the conductor passes through the fixed housing and forms a protrusion. Multiple protrusions on the brush are spaced apart in the direction from the inner ring wall of the rotating ring body to the outer ring wall of the rotating ring body. The rotating ring body includes an insulating housing and multiple conductive rings. The insulating housing is fixedly connected to the top plate. Multiple annular grooves are spaced apart in the direction from the inner ring wall of the rotating ring body to the outer ring wall of the rotating ring body. Multiple conductive rings correspond one-to-one with multiple annular grooves. The conductive rings are set in the annular grooves. The radar component is electrically connected to multiple conductive rings. Multiple conductive rings correspond one-to-one with multiple conductors. The protrusions of the conductors extend into the corresponding annular grooves and abut against the conductors.

[0007] In this application, the base and the radar assembly are electrically connected via brushes and a rotating ring within the rotating platform. The rotating ring contains multiple independent annular grooves and multiple independent conductive rings. The brush contains multiple independent conductors, and each conductor is electrically connected to an independent conductive ring via an independent annular groove. This allows multiple wires to be electrically connected to the radar assembly via different conductors and conductive rings, forming multiple independent circuits.

[0008] At this point, the components inside the base can be connected to different parts of the radar assembly through different circuits, and can achieve different functions through different circuits, such as power supply, signal transmission, and signal reception.

[0009] Furthermore, the radar assembly and the base can rotate around the axis of the slewing bearing. At this time, the conductive ring inside the rotating ring also rotates around the axis of the slewing bearing. The conductor can then come into contact with the conductive ring as it rotates, thus achieving a stable connection of the circuit.

[0010] In some embodiments of this application, the protruding end of the conductor forms an arc surface, and an arc-shaped recess is formed on the side of the conductive ring facing the conductor. The arc surface of the conductor abuts against the arc-shaped recess of the conductor. The arc surface can have a larger contact area, thereby reducing the resistance and improving circuit function and signal transmission.

[0011] In some embodiments of this application, multiple annular grooves are formed on the bottom and top walls of the rotating ring body, and multiple conductive rings are configured as double layers along the axial direction of the rotating ring body, with one conductive ring disposed in each annular groove; multiple conductors are located on the upper and lower sides of the rotating ring body, with one conductor disposed in each annular groove.

[0012] By setting annular grooves on both the top and bottom walls of the rotating ring and making the conductive ring double-layered, the number of annular grooves on the rotating ring can be increased, and the interconnection between the conductor ring and the rotating ring can be improved. This helps to power more components located in the base and radar assembly, and also facilitates the further expansion of the radar assembly's functionality.

[0013] In some embodiments of this application, multiple annular grooves are evenly spaced in the direction from the inner ring wall of the self-rotating ring to the outer ring wall of the rotating ring. This evenly spaced distribution of the annular grooves simplifies the dimensional settings of the annular grooves and the conductor, facilitates standardization, and reduces manufacturing difficulty and cost.

[0014] In some embodiments of this application, the depth and width of multiple annular grooves are all the same. Having the same depth and width of the annular grooves allows the conductors to have the same size, thus ensuring that the strength of different conductors is similar and preventing some conductors from breaking due to insufficient strength when rotated with the annular groove.

[0015] In some embodiments of this application, the brush further includes an elastic element. A plurality of grooves are formed on the fixed housing, pointing towards an annular groove. A plurality of conductors correspond one-to-one with the plurality of grooves, and the conductors are slidably disposed within the grooves. The elastic element is disposed within the grooves, and the conductors abut against the elastic element. The elastic element can apply a thrust to the conductors, stabilizing the contact between the conductors and the conductive ring.

[0016] In some embodiments of this application, the brush further includes a guide body slidably disposed within a groove, positioned between two elastic members, and containing a channel for connecting the wire to the conductor. The guide body serves two purposes: firstly, it prevents direct connection between the elastic member and the conductor, providing space for wire arrangement; secondly, it guides the conductor, ensuring stable sliding.

[0017] In some embodiments of this application, a mounting plate extends outward from the bottom of the fixed housing, and the novel lidar calibration device further includes a threaded connector, through which the mounting plate and the base are fixedly connected. The mounting plate facilitates the fixed connection between the fixed housing and the base.

[0018] In some embodiments of this application, the rotating ring and the top plate are attached together. This attachment facilitates wiring between the radar assembly and the conductive ring within the rotating ring. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0020] Figure 1 This is a schematic diagram of a novel lidar calibration device provided in an embodiment of this application.

[0021] Figure 2 A novel lidar calibration device provided in the embodiments of this application Figure 1 A magnified view of a portion of point A in the middle.

[0022] Figure 3 This is a schematic diagram of another embodiment of the rotating ring in a novel lidar calibration device provided in this application.

[0023] Reference numerals: 1-base; 11-inner annular surface; 12-outer mounting surface; 13-wire; 2-rotating platform; 21-top plate; 22-slewing bearing; 23-rotating ring; 231-insulating housing; 232-conductive ring; 233-annular groove; 3-radar assembly; 4-brush; 41-fixed housing; 42-conductor; 43-elastic element; 44-slide groove; 45-guide. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0028] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0029] LiDAR, as an important environmental perception sensor, is widely used in fields such as autonomous driving, robot navigation, and surveying. To ensure that LiDAR can accurately measure the distance and angle information of target objects, it needs to be precisely calibrated.

[0030] The lidar includes a base, a rotating platform, a target system, and a laser emitting and receiving system. The laser emitting and receiving system and the target system are fixedly connected to the base via the rotating platform, and can rotate 360° on the base via the rotating platform.

[0031] The battery is usually housed inside the base, so the rotating platform typically has a built-in rotating power supply disk, which is electrically connected to the base via brushes to achieve sliding power supply. However, the overall metal material of the turntable is not conducive to the laying of cables. When multiple sets of cables are required, multiple coaxial power supply rings need to be installed, which is quite troublesome to manufacture and install.

[0032] Therefore, please refer to Figure 1 This application provides a novel lidar calibration device, including a base 1, a rotating platform 2, a radar assembly 3, and a brush 4.

[0033] Please refer to Figure 1 The base 1 has an inner annular surface 11 and an outer mounting surface 12, with multiple wires 13 extending upward from the inner annular surface 11. The base plays a crucial supporting and stabilizing role in the entire device. The base 1 can be designed as a rectangular block to provide a larger support area, ensuring that the device will not sway or tip over due to instability during operation.

[0034] Please refer to Figure 1 The base 1 can be made of high-strength aluminum alloy; the base 1 can be placed on a horizontal and stable workbench. During installation, the base 1 can be firmly fixed to the workbench using the matching anchor bolts through the four pre-drilled mounting holes on the bottom of the base 1.

[0035] Please refer to Figure 1 The base 1 can also be equipped with some key components. These include cable trays for cable management and protection. The cable trays can be made of insulating material to neatly store and separate various power cables and signal cables that are led out from the base 1, i.e., the multiple conductors 13 mentioned in this solution. This prevents the cables from getting tangled and interfering with each other, and at the same time protects the cables to prevent them from being worn and affecting signal transmission and power supply.

[0036] Please refer to Figure 1 In addition, a small power distribution module can be integrated inside the base 1. This module can reasonably distribute the external power supply to provide stable power support for various components such as the rotating platform 2, the laser emission and reception system, and the control system.

[0037] The power distribution module can have overvoltage and overcurrent protection functions, so that when abnormal power fluctuations occur, the circuit will be automatically cut off to protect the electronic components in the device from damage and improve the safety and stability of the device operation.

[0038] Please refer to Figure 1 The rotating platform 2 includes a top plate 21, a slewing bearing 22, and a rotating ring 23. The rotating platform 2 is mounted on the base 1 and can rotate 360 ​​degrees to adjust the relative angle between the target and the lidar.

[0039] Please refer to Figure 1 The slewing bearing 22 consists of an inner ring and an outer ring connected by a raceway. They share the axial force, radial force, and overturning moment. Rolling elements can be installed between the outer ring and the inner ring to ensure stable relative rotation between them. The top plate 21 can be fixedly connected to the outer ring, and the base 1 can be fixedly connected to the inner ring, allowing the base 1 and the top plate 21 to rotate relative to each other.

[0040] Please refer to Figure 1 The top plate 21 is fixedly mounted on the slewing bearing 22. The top plate 21 can be made of metal, such as aluminum, stainless steel, or non-metallic plastic. The top plate 21 and the slewing bearing 22 can be connected by bolts to fix them to each other.

[0041] Please refer to Figure 1 The slewing bearing 22 is fixedly mounted on the outer mounting surface 12 of the base 1, so that the rotating platform 2 and the base 1 can rotate relative to each other about the axis of the slewing bearing 22. The slewing bearing 22 is mounted on the outer mounting surface 12 of the base 1, which leaves space between it and the inner support surface, so as to facilitate the arrangement and installation of the wires 13.

[0042] Please refer to Figure 1 The radar component 3 is mounted on the rotating platform 2. The radar component 3 may include a target system, a laser emission and reception system, and a control system, and may also have other auxiliary functional components, such as image capture.

[0043] Please refer to Figure 1 The target system can include planar targets, spherical targets, and cornerstone prism targets. Planar targets are used for initial calibration of the horizontal and vertical angles of the lidar; their surfaces have a high-precision reflective coating to ensure stable reflection of the laser beam. Spherical targets are used to accurately measure the distance accuracy of the lidar; by measuring different positions on the spherical target, the measurement error of the lidar at different distances can be obtained. Cornerstone prism targets are used to calibrate the angular resolution of the lidar; their special structure reflects the laser beam back along its original path, facilitating accurate measurement of angular deviations.

[0044] Please refer to Figure 1The laser transmitting and receiving system can employ a highly stable laser transmitter to improve measurement accuracy. The laser receiver can utilize a highly sensitive photodetector, capable of quickly and accurately receiving reflected light signals and converting them into electrical signals. Simultaneously, the system can be equipped with signal amplifiers and filters to enhance and process weak electrical signals and reduce noise interference.

[0045] Please refer to Figure 1 The control component can be a microprocessor, such as an MCU or CPU. By writing specialized control software, precise control of each component of the calibration device can be achieved. Interactive elements can also be set up to facilitate control operations by the operator.

[0046] Please refer to Figure 1 The target system can consist of multiple targets of different shapes and sizes, which can be replaced according to calibration requirements. The laser emitting and receiving system is used to emit laser beams and receive reflected light to measure distance and angle information. The control system is responsible for coordinating the work of various components to achieve an automated calibration process.

[0047] Please refer to Figure 1 The brush 4 includes a fixed housing 41 and multiple conductors 42. The fixed housing 41 can be made of a non-metallic rigid material, such as polycarbonate engineering plastic, or other plastic materials; the conductors 13 can be made of a highly conductive and wear-resistant copper-graphite composite material. This material combines the good conductivity of copper with the self-lubricating and wear-resistant properties of graphite, and can maintain stable current conduction and a low wear rate during long-term sliding contact.

[0048] Please refer to Figure 1 The shape of the conductor 13 can be cylindrical or prismatic, and the number of conductors 42 can be adjusted as needed, ranging from 3 to 30.

[0049] Please refer to Figure 1 The fixed housing 41 is fixedly connected to the base 1, and multiple conductors 42 are independently distributed within the fixed housing 41. The fixed housing 41 and the base 1 can be connected by bolts, welding, or bonding. The different conductors 42 are independent of each other, and each conductor 42 can be connected to only one wire 13 to conduct electrical energy or signals.

[0050] Please refer to Figure 1Multiple wires 13 correspond one-to-one with multiple conductors 42. One end of each wire 13 is fixedly connected to one end of its corresponding conductor 42, and the other end of the conductor 42 passes through the fixed housing 41 and forms a protrusion. The connection between the wire 13 and the conductor 42 can be fixed or bound together by contacts or terminals. The protrusion of the wire 13 can be square or cylindrical. The protrusions of different conductors 42 can have similar shapes and be the same or different in size.

[0051] Please refer to Figure 1 The multiple protrusions on the brush 4 are distributed at intervals in the direction from the inner ring wall of the rotating ring 23 to the outer ring wall of the rotating ring 23. The multiple protrusions on the brush 4 can be located on the same diameter of the rotating ring 23, or they can be located on different diameters, as long as the different protrusions are set to be off-axis about the axis of the rotating ring 23.

[0052] Please refer to Figure 1 The rotating ring 23 includes an insulating shell 231 and multiple conductive rings 232. The insulating shell 231 is fixedly connected to the top plate 21. The insulating shell 231 can be made of plastic or other materials. The conductive rings 232 can be made of the same material as the conductor 42, such as copper-graphite composite material, to make them wear-resistant and have stable contact, or they can be made of copper. Different conductive rings 232 should have different inner and outer diameters so that multiple conductive rings 232 do not contact each other when they are coaxially distributed.

[0053] Please refer to Figure 1 The insulating housing 231 has multiple annular grooves 233 spaced apart in the direction from the inner ring wall of the rotating ring 23 to the outer ring wall of the rotating ring 23. Multiple conductive rings 232 correspond one-to-one with the multiple annular grooves 233 and are disposed within the annular grooves 233. The width of the annular groove 233 can be set to correspond to the width of the corresponding wire ring 13, so that the conductive ring 232 can be installed within the corresponding annular groove 233. Simultaneously, the insulating housing 231 can also be provided with wiring connecting to components within the radar assembly 3, allowing the conductive rings 232 to connect to different circuits to supply power or transmit signals to different components.

[0054] Please refer to Figure 1 The radar component 3 is electrically connected to multiple conductive rings 232, and each conductive ring 232 corresponds to a multiple conductive body 42. The protrusions of the conductive body 42 extend into the corresponding annular groove 233 and abut against the conductive body 42. Since each conductive ring 232 corresponds to a corresponding annular groove 233, each conductive body 42 corresponds to a corresponding annular groove 233. That is, each annular groove 233 contains a corresponding conductive ring 232, and a corresponding conductive body 42 extends into it.

[0055] Please refer to Figure 1Alternatively, two conductors 42 can be made to contact the same wire 13, and both conductors 42 can be simultaneously inserted into an annular groove 233 and electrically connected to the same conductive ring 232. The two conductors 42 on the same wire 13 are electrically connected to the wire 13 through an "OR" switch, so that only one conductor 42 is energized with the wire 13 at any given time, and the other conductor 42 is a spare. When a conductor 42 malfunctions, the spare conductor 42 can be used directly through the switch, reducing the maintenance rate after a failure and increasing the service life.

[0056] Please refer to Figure 1 In this application, the base 1 and the radar assembly 3 are electrically connected through the brush 4 and the rotating ring 23 in the rotating platform 2. The rotating ring 23 has multiple independent annular grooves 233 and multiple independent conductive rings 232. The brush 4 has multiple independent conductors 42, and each conductor 42 is electrically connected to an independent conductive ring 232 through an independent annular groove 233. This allows multiple wires 13 to be electrically connected to the radar assembly 3 through different conductors 42 and conductive rings 232, forming multiple independent circuits.

[0057] Please refer to Figure 1 At this time, the components in the base 1 can be connected to different parts of the radar assembly 3 through different circuits, and can achieve different functions through different circuits, such as power supply, signal transmission, signal reception, etc.

[0058] Please refer to Figure 1 Furthermore, the radar assembly 3 and the base 1 can rotate around the axis of the slewing bearing 22. At this time, the conductive ring 232 inside the rotating ring 23 also rotates around the axis of the slewing bearing 22. At this time, the conductor 13 can abut against the conductive ring 232 when the conductive ring 232 rotates, thus achieving a stable connection of the line.

[0059] Please refer to Figure 2 In some examples, the protruding end of the conductor 42 forms an arc surface, and the conductive ring 232 has an arc-shaped recess on its end face facing the conductor 42. The arc surface of the conductor 42 abuts against the arc-shaped recess of the conductor 42. The arc surface can have a larger contact area, thereby reducing the resistance and improving circuit function and signal transmission.

[0060] Please refer to Figure 2 In some examples, the arc surface of the conductor 42 can be a circular arc surface or other curved surfaces, and the arc-shaped recess can be exactly the same as the arc surface of the conductor 42 so that the two can fit together perfectly. In this case, in order to avoid the formation of gaps between the conductor 42 and the conductive ring 232, both the conductor 42 and the conductive ring 232 can have high precision.

[0061] Please refer to Figure 2Alternatively, in some other examples, the protruding end of the conductor 42 forms an arc-shaped recess, and the conductive ring 232 has an arc surface on one side of its end face facing the conductor 42, with the arc surface extending into the arc-shaped recess, which can also achieve the desired effect.

[0062] Please refer to Figure 3 In some examples, multiple annular grooves 233 are formed on the bottom and top walls of the rotating ring body 23, respectively. Along the axial direction of the rotating ring body 23, multiple conductive rings 232 are configured as double layers, and a conductive ring 232 is provided in each annular groove 233. Multiple conductors 42 are located on the upper and lower sides of the rotating ring body 23, and a conductor 42 is provided in each annular groove 233.

[0063] Please refer to Figure 3 By providing annular grooves 233 on both the top and bottom walls of the rotating ring 23 and setting the conductive ring 232 as a double layer, the number of annular grooves 233 on the rotating ring 23 can be increased, and the interconnection between the wire 13 ring and the rotating ring 23 can be improved. This helps to power more components located in the base 1 and the radar assembly 3, and is also more conducive to the further expansion of the function of the radar assembly 3.

[0064] Please refer to Figure 3 In some examples, a gap is required between the rotating ring 23 and the top plate 21, and this gap is sufficient to accommodate the portion of the brush 4 located on the upper side of the rotating ring 23. In this case, the fixing housing 41 of the brush 4 is U-shaped, and the rotating ring 23 is located in the internal space of the fixing housing 41.

[0065] Please refer to Figure 3 In some examples, the inner ring wall of the self-rotating ring 23 points in the direction of the outer ring wall of the rotating ring 23, and multiple annular grooves 233 are distributed at equal intervals. The equal interval distribution of the annular grooves 233 makes it easier to set the dimensions of the annular grooves 233 and the conductor 42, which helps to unify the standards, while reducing the manufacturing difficulty and cost.

[0066] In some other examples, the inner ring wall of the self-rotating ring 23 points in the direction of the outer ring wall of the rotating ring 23, and multiple annular grooves 233 are distributed at arbitrary intervals. That is, the spacing between any two adjacent annular grooves 233 can be different.

[0067] Please refer to Figure 3 In some examples, the depth and width of multiple annular grooves 233 are the same. Having the same depth and width of the annular grooves 233 allows the conductors 42 to have the same size, thus ensuring that the strength of different conductors 42 is similar. This prevents some conductors 42 from breaking due to insufficient strength when they are rotatably connected to the annular grooves 233.

[0068] In some other examples, the width of different annular grooves 233 can be different. In this case, the size of the conductive ring 232 can be designed according to the content that the conductor 42 and the conductive ring 232 in the annular groove 233 need to transmit, and then converted into the size of the annular groove 233.

[0069] Different annular grooves 233 can have different depths so that there is a unique fit between the rotating ring 23 and the brush 4.

[0070] Please return to the reference. Figure 2 In some examples, the brush 4 also includes an elastic element 43. A plurality of grooves 44 are formed on the fixed housing 41, pointing towards the annular groove 233. A plurality of conductors 42 correspond one-to-one with the plurality of grooves 44, and the conductors 42 are slidably disposed within the grooves 44. The elastic element 43 is disposed within the grooves 44, and the conductors 42 abut against the elastic element 43. The elastic element can apply a pushing force to the conductors 42, stabilizing the contact between the conductors 42 and the conductive ring 232.

[0071] Please continue to refer to Figure 2 In some examples, the elastic element 43 can be a spring, which can provide stable and moderate pressure to the conductor 42, making it fit tightly against the surface of the conductive ring 232. When the rotating platform 2 rotates, the brush 4, under the action of the elastic element, always maintains good contact with the conductive ring 232, realizing stable transmission of current and signal.

[0072] Please continue to refer to Figure 2 In some examples, the brush 4 also includes a guide 45, which is slidably disposed within the groove 44 and positioned between the elastic members 43. The guide 45 has a channel within it for connecting the wire 13 to the conductor. The guide 45 serves two purposes: firstly, it prevents direct connection between the elastic member 43 and the conductor 42, providing space for the arrangement of the wire 13; secondly, it provides guidance for the conductor 42, ensuring stable sliding of the conductor 42.

[0073] Please refer to Figure 2 In some examples, the guide body 45 can be a non-metallic rigid material, such as plastic, or other materials. The guide body 45 can abut against the spring and the guide body 45 simultaneously to achieve the desired effect; or the guide body 45 can be fixedly connected to one or both of the spring and the guide body 45 to achieve a similar effect.

[0074] Please return to the reference. Figure 1 In some examples, the bottom of the fixed housing 41 extends outward to form a mounting plate. The novel lidar calibration device also includes a threaded connector, and the mounting plate is fixedly connected to the base 1 via the threaded connector. The mounting plate facilitates the fixed connection between the fixed housing 41 and the base 1.

[0075] In some examples, the threaded connectors can be bolts, the mounting plates can be fan-shaped or ring-shaped, and the number of threaded connectors can be 3 to 6.

[0076] In some examples, the rotating ring 23 and the top plate 21 are attached together. This attachment facilitates wiring between the radar assembly 3 and the conductive ring 232 within the rotating ring 23.

[0077] In some examples, the conductive ring 232 can only be set on the inner ring wall and bottom wall of the annular ring body; the rotating ring body 23 and the top plate 21 can be fixedly connected by threaded parts, or by bonding or welding.

[0078] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0079] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A novel lidar calibration device, characterized in that, include: The base has an inner annular surface and an outer mounting surface, with multiple wires extending upward from the inner annular surface; A rotating platform includes a top plate, a slewing bearing, and a rotating ring. The top plate is fixedly mounted on the slewing bearing, and the slewing bearing is fixedly mounted on the outer mounting surface of the base, so that the rotating platform and the base can rotate relative to each other about the axis of the slewing bearing. The radar assembly is mounted on the rotating platform; A brush includes a fixed housing and multiple conductive bodies. The fixed housing is fixedly connected to the base. The multiple conductive bodies are independently distributed within the fixed housing. Multiple wires correspond one-to-one with the multiple conductive bodies. One end of each wire is fixedly connected to one of the corresponding conductive bodies. The other end of each conductive body passes through the fixed housing and forms a protrusion. The multiple protrusions on the brush are spaced apart from the inner ring wall of the rotating ring body to the outer ring wall of the rotating ring body. The rotating ring body includes an insulating shell and multiple conductive rings. The insulating shell is fixedly connected to the top plate. The insulating shell has multiple annular grooves spaced apart from the inner ring wall of the rotating ring body to the outer ring wall of the rotating ring body. The multiple conductive rings correspond one-to-one with the multiple annular grooves and are disposed in the annular grooves. The radar assembly is electrically connected to the multiple conductive rings. The multiple conductive rings correspond one-to-one with the multiple conductive bodies. The protrusions of the conductive bodies extend into the corresponding annular grooves and abut against the conductive bodies.

2. The novel lidar calibration device according to claim 1, characterized in that, The protruding end of the conductor forms an arc surface, and the conductive ring has an arc-shaped recess on one side of its end face facing the conductor. The arc surface of the conductor abuts against the arc-shaped recess of the conductor.

3. The novel lidar calibration device according to claim 2, characterized in that, Multiple annular grooves are respectively formed on the bottom wall and top wall of the rotating ring body. Along the axial direction of the rotating ring body, multiple conductive rings are configured as double layers, and each annular groove contains one conductive ring. Multiple conductors are located on the upper and lower sides of the rotating ring, and one conductor is provided in each annular groove.

4. The novel lidar calibration device according to claim 1, characterized in that, The annular grooves are evenly spaced in a direction from the inner ring wall of the rotating ring to the outer ring wall of the rotating ring.

5. The novel lidar calibration device according to claim 1, characterized in that, The depth and width of the plurality of annular grooves are all the same.

6. The novel lidar calibration device according to any one of claims 1 to 5, characterized in that, The brush also includes an elastic element. A plurality of sliding grooves are formed on the fixed housing. The sliding grooves point to the annular groove. A plurality of conductors correspond one-to-one with the plurality of sliding grooves. The conductors are slidably disposed in the sliding grooves. The elastic element is disposed in the sliding grooves and abuts against the elastic element.

7. The novel lidar calibration device according to claim 6, characterized in that, The brush also includes a guide body, which is slidably disposed within the groove and between the elastic element and the elastic element. The guide body has a channel for connecting the wire to the conductor.

8. The novel lidar calibration device according to claim 1, characterized in that, The bottom of the fixed housing extends outward to form a mounting plate, and the novel lidar calibration device also includes a threaded connector, through which the mounting plate and the base are fixedly connected.

9. The novel lidar calibration device according to claim 1, characterized in that, The rotating ring and the top plate are attached together.

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