Laser radar cover, laser radar and vehicle

Abstract

The utility model provides a laser radar cover, a laser radar and a vehicle. The laser radar cover comprises a cover body and a noise reduction structure. The cover body comprises a top wall, a side wall surrounding the top wall and a transition part connecting the top wall and the side wall, and the top wall, the side wall and the transition part define an accommodating cavity for accommodating a radar main body; the noise reduction structure comprises a plurality of turbulent flow generation parts and a plurality of adsorption parts, the multiple turbulent flow generation parts are at least partially arranged on the transition part and extend towards the adsorption parts, the multiple turbulent flow generation parts are arranged at intervals in the circumferential direction of the transition part, and the multiple adsorption parts are arranged at the positions, close to the transition part, of the top wall at intervals; the technical problem that an existing laser radome is high in wind noise can be solved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle radar technology, specifically to a lidar cover, a lidar, and a vehicle. Background Technology

[0002] LiDAR, with its high precision and high resolution, has become an indispensable sensor in intelligent driving, especially in complex traffic scenarios requiring accurate measurement and rapid response. As technology advances, the cost of LiDAR is decreasing, and its application in intelligent driving is becoming increasingly widespread.

[0003] LiDAR sensors are typically installed on the roof, front grille, or hood of a vehicle. Among these, installation on the roof offers advantages such as a better detection field of view, less susceptibility to sand and gravel splashes, and less damage during collisions, making it a preferred choice. However, the roof is an area where airflow accelerates, and this area is highly sensitive to changes in shape. Adding a LiDAR sensor to the roof can interfere with the airflow, causing turbulence and generating significant eddies. This, in turn, increases wind noise at high speeds. To address wind noise, the LiDAR sensor housing is usually designed with a streamlined shape. However, this design severely limits the aesthetic appeal of the housing and makes it difficult to meet users' high demands for aesthetic design. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a lidar cover, a lidar, and a vehicle to improve the technical problem of high wind noise in existing lidar covers.

[0005] To achieve the above and other related objectives, this utility model provides a lidar cover, a lidar, and a vehicle. The lidar cover includes a cover body and a noise reduction structure. The cover body includes a top wall, side walls surrounding the top wall, and a transition portion connecting the top wall and the side walls. The top wall, the side walls, and the transition portion form a receiving cavity for accommodating the lidar body. The noise reduction structure includes multiple turbulence generating portions and multiple adsorption portions. The multiple turbulence generating portions are at least partially disposed in the transition portion and extend toward the adsorption portions. The multiple turbulence generating portions are arranged at intervals along the circumference of the transition portion. The multiple adsorption portions are spaced apart at intervals on the top wall near the transition portion.

[0006] In one example of the lidar cover of this utility model, the turbulence generating part includes two turbulence ribs, which are arranged at an angle. The turbulence generating part has a small opening end facing the side wall and a large opening end away from the side wall.

[0007] In one example of the lidar cover of this utility model, the included angle α of the two ribs is in the range of 10°≤α≤20°.

[0008] In one example of the lidar cover of this utility model, the distance c between the two baffles at the small opening end is in the range of: c≥3.5mm.

[0009] In one example of the lidar cover of this utility model, the length a of the baffle rib is in the range of 5mm≤a≤15mm, and the height b of the highest point of the baffle rib is in the range of 0.5mm≤b≤3mm.

[0010] In one example of the lidar cover of this utility model, the adsorption part includes a pit.

[0011] In one example of the lidar cover of this utility model, the recess is circular, the diameter d of the recess is in the range of 0.2mm≤d≤0.5mm, and the depth h of the recess is in the range of 0.2mm≤h≤0.5mm.

[0012] In one example of the lidar cover of this utility model, the plurality of adsorption parts are arranged in an array along the circumference of the top wall and in a direction perpendicular to the circumference, and the range of the distance e between each two adjacent adsorption parts is: 1mm≤d≤2mm.

[0013] This utility model also provides a lidar, including a sensing system and a lidar cover as described in any of the above claims, wherein the sensing system is disposed on the windward side of the sidewall.

[0014] This utility model also provides a vehicle that includes the aforementioned lidar.

[0015] This utility model relates to a lidar cover, which incorporates a noise reduction structure on the cover body. The noise reduction mechanism includes a turbulence generating section and an adsorption section. The plurality of turbulence generating sections, arranged at intervals, are at least partially located in the transition section and extend towards the adsorption section. The plurality of adsorption sections are also spaced apart on the top wall near the transition section. The turbulence generating section transforms the airflow from laminar to turbulent flow, increasing the fluid kinetic energy and ensuring sufficient energy for the airflow to reach the adsorption section. The adsorption section then adsorbs the turbulence generated by the turbulence generating section onto the top wall, delaying the separation of the surface airflow from the lidar cover and reducing wind noise. This overcomes the limitation of reducing wind noise through the shape design of the lidar cover, thereby enabling diverse lidar cover designs and meeting users' aesthetic requirements for lidar cover appearance. Attached Figure Description

[0016] 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 embodiments can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a lidar according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0019] Figure 3 This is a side view of a baffle rib according to an embodiment of the present invention.

[0020] Component designation explanation

[0021] 100. LiDAR radome; 110. radome body; 111. Top wall; 112. Side wall; 113. Transition section; 120. Noise reduction structure; 121. Turbulence generation section; 1211. Baffle rib; 122. Adsorption section; 1221. Dent; 200. Sensing system. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0023] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.

[0024] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0025] Please see Figures 1 to 3 This utility model provides a lidar cover 100, a lidar, and a vehicle. The lidar cover 100 includes a cover body 110 and a noise reduction structure 120. By setting the noise reduction structure 120 on the cover body 110, the lidar cover 100 can reduce wind noise. This breaks the limitation of reducing wind noise through the shape design of the lidar cover 100, thereby realizing the diversity of lidar cover 100 shape design and meeting users' needs for the aesthetic appearance of the lidar cover 100.

[0026] Please see Figure 1 The cover body 110 includes a top wall 111, a side wall 112 surrounding the top wall 111, and a transition portion 113 connecting the top wall 111 and the side wall 112. The top wall 111, the side wall 112, and the transition portion 113 form a receiving cavity for accommodating the radar body. The connection between the top wall 111, the side wall 112, and the transition portion 113 can be achieved in various ways, such as integral stamping, integral casting, or separate welding, as long as a receiving cavity that can accommodate the radar body can be formed. The circumference of the side wall 112 is not limited; it can be cylindrical or prismatic, or it can be along any other closed-loop contour that can match the end wall. The transition portion 113 can be a transition fillet or a transition chamfer between the top wall 111 and the side wall 112. The setting of the transition portion 113 improves the aesthetics of the appearance, avoids stress concentration, and is also used to set the noise reduction structure 120.

[0027] Wind noise is noise generated by fluid flow, especially when airflow separates and eddies form. These airflows mix with the surrounding fluid, creating pressure fluctuations that produce sound. Therefore, wind noise can be reduced by controlling airflow separation and minimizing the generation of larger eddies. In this embodiment, please refer to... Figures 1 to 2The noise reduction structure 120 includes a plurality of turbulence generating parts 121 and a plurality of adsorption parts 122. The plurality of turbulence generating parts 121 are at least partially disposed on the transition part 113 and extend toward the adsorption parts 122. That is, the turbulence generating parts 121 may be entirely located on the transition part 113, or partially located on the transition part 113 and partially extended to the top wall 111. The plurality of turbulence generating parts 121 are arranged circumferentially at intervals along the transition part 113, that is, there is a gap between each turbulence generating part 121. The plurality of adsorption parts 122 are spaced apart on the top wall 111 near the transition part 113, that is, there is a gap between the plurality of adsorption parts 122 and they are located on the top wall 111 near the edge of the transition part 113. The turbulence generator 121 can convert the airflow from laminar flow to turbulence to increase the fluid kinetic energy, so that the airflow has enough energy to reach the adsorption unit 122. The adsorption unit 122 can then adsorb the turbulence generated by the turbulence generator 121 onto the top wall 111, delaying the separation of the surface airflow from the lidar cover 100 and reducing wind noise.

[0028] Please see Figures 1 to 2 The turbulence generating unit 121 has various structural forms that can transform the airflow from laminar flow to turbulence, and there is no limitation on these forms. For example, it can be a linear structure, a grid structure, or a structure similar to turbulence strips. The adsorption unit 122 has various structural forms that can adsorb the turbulence generated by the turbulence generating unit 121 onto the top wall 111, including pits, microporous structures, rough surfaces, porous materials, etc., but is not limited to these.

[0029] Please see Figure 2 In one example of the lidar radome 100 of this utility model, the turbulence generating part 121 includes two turbulence ribs 1211, which are arranged at an angle. The turbulence generating part 121 has a small opening towards the sidewall 112 and a large opening away from the sidewall 112. The two turbulence ribs 1211 are similar to a small-span airfoil. They generate wingtip vortices in the windward airflow. The wingtip vortices are very strong and transfer energy downstream through mixing. This allows the airflow, which is prone to separation under poor flow conditions, to regain energy and continue to adhere to the surface of the lidar radome 100, resisting separation. This ensures that the airflow has enough energy to reach the adsorption part 122. The adsorption part 122 adsorbs the airflow to be separated onto the top wall 111, delaying the separation of the surface airflow from the lidar radome 100 and reducing wind noise.

[0030] Please see Figure 2In one example of the lidar cover 100 of this utility model, the included angle α of the two turbulence ribs 1211 is in the range of 10°≤α≤20°. The included angle of the turbulence ribs 1211 is set within this range. On the one hand, the two turbulence ribs 1211 can form a shape similar to a small-span airfoil, turning the airflow into turbulence. On the other hand, each turbulence generating part 121 occupies a smaller area, that is, more turbulence generating parts 121 can be set in a unit area, which can achieve a better effect of turbulence generation.

[0031] Please see Figure 2 In one example of the lidar cover 100 of this utility model, the distance c between the two turbulence ribs 1211 at the small opening end is in the range of: c ≥ 3.5 mm, for example, it can be 3.5 mm, 3.8 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm or 7 mm, etc. This setting can transform the airflow from laminar flow to turbulent flow, thereby increasing the fluid kinetic energy.

[0032] Please see Figure 2 and Figure 3 In one example of the lidar cover 100 of this utility model, the length 'a' of the baffle rib 1211 ranges from 5mm to 15mm, for example, it can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm. The height 'b' of the highest point of the baffle rib 1211 ranges from 0.5mm to 3mm, for example, it can be 0.5mm, 0.7mm, 1mm, 1.2mm, 1.5mm, 2mm, 2.2mm, 2.5mm, 2.8mm, or 3mm. This arrangement can induce fine vortices in the airflow.

[0033] Please see Figure 2 In one example of the lidar cover 100 of this utility model, the adsorption part 122 includes a pit 1221, which can play an adsorption role. The airflow near the pit 1221 will form a small vortex, which has a suction effect, causing the airflow that is about to separate on the surface to be attracted by the vortex, further delaying the separation of the airflow.

[0034] Please see Figure 2In one example of the lidar cover 100 of this utility model, the recess 1221 is circular, and the diameter d of the recess 1221 is in the range of 0.2mm ≤ d ≤ 0.5mm, for example, it can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm, etc. The depth h (not shown) of the recess 1221 is in the range of 0.2mm ≤ h ≤ 0.5mm, for example, it can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm, etc. Setting the recess 1221 within the above size range has a better adsorption effect. If the size is too small or too large, airflow separation may occur when airflow passes through, thereby increasing the noise inside the vehicle. It should be noted that the shape and size of each recess 1221 should be consistent. If the size and shape are different, it will cause airflow disorder under certain circumstances, which is not conducive to reducing wind noise.

[0035] Please see Figures 1 to 2 In one example of the lidar cover 100 of this utility model, the plurality of adsorption parts 122 are arranged in an array along the circumference of the top wall 111 and in a direction perpendicular to the circumference. Specifically, the array arrangement is such that the plurality of adsorption parts 122 are arranged in a circumferential array along the circumference of the top wall 111, and the plurality of circumferential arrays are arranged in a radial array in a direction perpendicular to the circumferential direction. The arrangement path of the circumferential array is the same as the shape of the outer periphery of the top wall 111. The shape of the outer periphery of the top wall 111 is not limited and can be square, polygonal, circular, elliptical or other irregular shapes, etc. The adsorption parts 122 between each adjacent circumferential array can be aligned or staggered, and there is no limitation on this. In this embodiment, the adsorption parts 122 between each adjacent circumferential array are aligned. The plurality of adsorption parts 122 are arranged in a regular manner, which can realize that the airflow from the front end to the rear end of the lidar cover 100 can pass through the adsorption parts 122 more evenly, thereby improving the flow of the top airflow, generating more regular disturbances, realizing the reduction of low-frequency noise, and thus reducing the total noise inside the vehicle.

[0036] Please see Figures 1 to 2 Furthermore, the spacing e between any two adjacent adsorption portions 122 is in the range of 1mm ≤ d ≤ 2mm, for example, it can be 1mm, 1.2mm, 1.5mm, 1.75mm, or 2mm, etc. Each pair of adjacent adsorption portions 122 includes adjacent portions arranged circumferentially along the top wall 111 and adjacent portions perpendicular to the circumferential direction. This arrangement can effectively reduce wind noise inside the vehicle and improve in-vehicle voice clarity by 1% to 3%.

[0037] Please see Figure 1This utility model also provides a lidar, including a sensing system 200 and a lidar cover 100 as described in any of the above claims. The sensing system 200 is disposed on the windward side of the side wall 112. Further, the windward side of the side wall 112 includes a transparent component. The radar body (not shown) is installed in a cavity formed by the top wall 111, the side wall 112, and the transition portion 113 to accommodate the radar body. The radar body emits laser light outward through the transparent component. After irradiating an object, the reflected light is received and analyzed by the sensing system 200. Due to the high directionality and coherence of the laser, long-distance anti-interference detection and ranging can be achieved.

[0038] This utility model also provides a vehicle including the aforementioned lidar, wherein the lidar cover 100 is detachably connected to the vehicle and can be directly replaced from an ordinary lidar cover 100. Therefore, the vehicle of this application also has all the beneficial effects of the aforementioned lidar, which will not be elaborated further here.

[0039] This utility model relates to a lidar cover, which incorporates a noise reduction structure on the cover body. The noise reduction mechanism includes a turbulence generating section and an adsorption section. The plurality of turbulence generating sections, arranged at intervals, are at least partially located in the transition section and extend towards the adsorption section. The plurality of adsorption sections are also spaced apart on the top wall near the transition section. The turbulence generating section transforms laminar flow into turbulent flow, increasing fluid kinetic energy and ensuring sufficient energy for the airflow to reach the adsorption section. The adsorption section then adsorbs the turbulence generated by the turbulence generating section onto the top wall, delaying the separation of the surface airflow from the lidar cover and reducing wind noise. This overcomes the limitation of reducing wind noise solely through the lidar cover's shape design, allowing for diverse lidar cover designs and meeting user needs regarding appearance. Therefore, this utility model effectively overcomes some practical problems in the prior art, thus possessing high utilization value and practical significance. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit its scope. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model shall still be covered by the claims of this utility model.

Claims

1. A lidar cover, characterized in that, include: The cover body includes a top wall, side walls surrounding the top wall, and a transition portion connecting the top wall and the side walls, wherein the top wall, the side walls, and the transition portion form a receiving cavity for accommodating the radar body; The noise reduction structure includes multiple turbulence generating parts and multiple adsorption parts. The multiple turbulence generating parts are at least partially disposed in the transition part and extend toward the adsorption part. The multiple turbulence generating parts are arranged at intervals along the circumference of the transition part. The multiple adsorption parts are spaced apart at positions on the top wall near the transition part.

2. The lidar cover according to claim 1, characterized in that, The turbulence generating part includes two turbulence ribs, which are arranged at an angle. The turbulence generating part has a small opening end facing the side wall and a large opening end away from the side wall.

3. The lidar cover according to claim 2, characterized in that, The included angle α between the two ribs is in the range of 10°≤α≤20°.

4. The lidar cover according to claim 2, characterized in that, The distance c between the two baffles at the small end is in the range of: c≥3.5mm.

5. The lidar cover according to claim 2, characterized in that, The length 'a' of the baffle rib is in the range of 5mm ≤ a ≤ 15mm, and the height 'b' of the highest point of the baffle rib is in the range of 0.5mm ≤ b ≤ 3mm.

6. The lidar cover according to claim 1, characterized in that, The adsorption section includes pits.

7. The lidar cover according to claim 6, characterized in that, The pit is circular, and the diameter d of the pit is in the range of 0.2mm≤d≤0.5mm. The depth h of the pit is in the range of 0.2mm≤h≤0.5mm.

8. The lidar cover according to claim 7, characterized in that, The plurality of adsorption units are arranged in an array along the circumference of the top wall and in a direction perpendicular to the circumference, and the spacing e between each two adjacent adsorption units is in the range of 1mm≤d≤2mm.

9. A lidar system, comprising a sensing system, characterized in that, It also includes a lidar cover according to any one of claims 1 to 8, wherein the sensing system is disposed on the windward side of the sidewall.

10. A vehicle, characterized in that, Including the lidar as described in claim 9.

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