A shield for lidar

Abstract

This utility model belongs to the field of shielding technology, and particularly relates to a shielding cover for a laser radar, comprising a shell, an optical cover, and an optical window. The shell has a hollow center and is provided with a first elastic limiting component, a second elastic limiting component, a third elastic limiting component, a fourth elastic limiting component, and heat dissipation holes. The optical cover is provided with a first limiting groove, a second limiting groove, and an anti-drop mechanism. The optical window is located between the hollow surface of the shell and the optical cover. The anti-drop mechanism is integrally connected to the top plate, bottom plate, and side plate of the optical cover. The anti-drop mechanism extends uniformly inward along the outermost periphery of the optical window by a rated length. By rationally setting the layer structure of the shell and the limiting components, limiting grooves, and heat dissipation holes of the shell and optical cover, the shielding cover not only has the ability to resist electromagnetic interference sources but also has vibration resistance and rapid heat dissipation characteristics.

Description

Technical Field

[0001] This utility model belongs to the field of shielding technology, and in particular relates to a shielding cover for a laser radar. Background Technology

[0002] With the development of autonomous driving technology, LiDAR modules have become one of the core sensors in Level 3 and above autonomous driving systems. LiDAR modules are required for obstacle detection, vehicle positioning, road feature recognition, and the construction of surrounding environment maps. Therefore, the accuracy of LiDAR detection data directly affects the performance of autonomous driving.

[0003] However, the onboard environment of new energy vehicles contains complex electromagnetic interference sources, such as high-frequency switching noise and harmonic interference generated by high-voltage electric drive systems, radio frequency signals of onboard communication equipment, electrostatic discharge and transient pulses. These interference sources can cause the signal-to-noise ratio of the lidar module to decrease, resulting in noise in the point cloud data of the lidar module, increasing the ranging error, and thus causing the autonomous driving system to make misjudgments, affecting driving safety.

[0004] Therefore, shielding is generally used to reduce the impact of electromagnetic interference sources on lidar modules. However, traditional lidar shielding only considers the shielding performance against electromagnetic interference sources, but ignores the shielding's adaptability to various driving environments. Utility Model Content

[0005] The purpose of this invention is to provide a shielding cover for lidar, which aims to solve the problem of poor environmental reliability of lidar shielding covers in the prior art. While having the ability to resist electromagnetic interference sources, it also has the characteristics of vibration resistance and fast heat dissipation.

[0006] To achieve the above objectives, this utility model provides a shielding cover for a lidar, characterized in that it includes a housing, an optical cover, and an optical window. The housing has a hollow center, and a first elastic limiting component is provided at the front end of the left side plate of the housing, which bends inward into the housing. A second elastic limiting component is provided at the front end of the right side plate of the housing, which also bends inward into the housing. The first and second elastic limiting components act on the left and right ends of the lidar module, respectively, to fix the lidar module. An adjacent [unclear text - possibly a typo, should be removed] is provided at the center of the top plate of the housing. The housing has a first heat dissipation hole and a second heat dissipation hole; the bottom plate of the housing has an adjacent third heat dissipation hole and a fourth heat dissipation hole at its center; the top plate of the housing has an upwardly protruding third elastic limiting component at its first end, and the bottom plate of the housing has a downwardly protruding fourth elastic limiting component at its first end; the top plate of the optical cover has an upwardly protruding first limiting groove; the bottom plate of the optical cover has a downwardly protruding second limiting groove; the third elastic limiting component and the first limiting groove are vertically aligned, and the fourth elastic limiting component and the second limiting groove are vertically aligned, thus covering the hollow surface of the housing with the optical cover;

[0007] The optical window is located between the hollowed-out surface of the housing and the hollowed-out surface of the optical cover; the front of the optical cover is provided with an anti-drop mechanism; the anti-drop mechanism is integrally connected with the top plate, the bottom plate and the side plate of the optical cover; the anti-drop mechanism extends uniformly inward along the outermost periphery of the optical cover by a rated length.

[0008] As an optional solution of this utility model, the housing and optical cover have a multi-layer structure from the outside to the inside, namely a bright tin layer, a nickel layer and a plastic layer.

[0009] As an optional embodiment of this invention, the thickness of the bright tin layer is 3 μm, and the thickness of the nickel layer is 3 μm.

[0010] As an optional solution of this utility model, the tail end of the top plate and the tail end of the bottom plate of the housing are respectively provided with a fifth elastic limiting component and a sixth elastic limiting component; by clamping the power module and the storage module, which are electrically connected to the lidar, between the fifth elastic limiting component and the sixth elastic limiting component, the power module and the storage module are fixed.

[0011] As an optional embodiment of this invention, the optical window includes an optical window body and a hydrophobic coating, the hydrophobic coating covering the outer surface of the optical window body.

[0012] As an optional solution of this utility model, both the left side plate and the right side plate of the housing are provided with limiting grooves, and the optical window is confined within the limiting grooves.

[0013] As an optional solution of this utility model, both the fifth elastic limiting component and the sixth elastic limiting component are provided with cylindrical protrusions at the middle position to avoid excessive deformation of the fifth elastic limiting component and the sixth elastic limiting component.

[0014] This application provides a shielding cover for a lidar radar. The lidar radar is fixed by a first and a second elastic limiting component on the housing. A third and a fourth elastic limiting component ensure a stable connection between the housing and the optical cover. A fifth and a sixth elastic limiting component secure the power module and storage module electrically connected to the lidar radar, giving the lidar vibration resistance within the shielding cover. Adjustable heat dissipation holes on the housing meet the heat dissipation requirements of the lidar radar within the shielding cover. A hydrophobic-coated optical window is fixed within the optical cover by the cooperation of limiting grooves and limiting protrusions. An anti-drop mechanism is provided on the front of the optical cover, enabling the lidar radar within the shielding cover to operate efficiently in severe weather conditions such as thunderstorms. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0016] Figure 1 This is a schematic diagram of the overall structure of a shielding cover for a lidar provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the front end structure of a shielding cover for a lidar provided in an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the rear end structure of the housing of a lidar shield provided for an embodiment of the present utility model.

[0019] Figure 4 This is a schematic diagram of the optical cover structure of a lidar shield provided for an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the optical window structure of a lidar shield provided for an embodiment of the present invention.

[0021] Figure 6 A side view of the housing of a lidar shield provided for an embodiment of this utility model.

[0022] Figure 7 This is a schematic diagram of the structure of the third elastic limiting component of a lidar shield provided in an embodiment of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of the fourth elastic limiting component of a lidar shield provided in an embodiment of the present invention.

[0024] The following are the labeling elements in the figure:

[0025] 1. Housing; 2. Optical cover; 3. Optical window; 11. Top plate; 12. Bottom plate; 13. Left side plate; 14. Right side plate; 101. First elastic limiting assembly; 102. Second elastic limiting assembly; 103. Third elastic limiting assembly; 104. Fourth elastic limiting assembly; 1031. Third elastic limiting groove; 1032. Third elastic limiting block; 1033. Upper arch structure; 1041. Fourth elastic limiting groove; 1042. Fourth elastic limiting... Position block; 1043, lower arch structure; 105, first heat dissipation hole; 106, second heat dissipation hole; 107, third heat dissipation hole; 108, fourth heat dissipation hole; 109, fifth elastic limiting component; 1010, fifth elastic limiting component; 1011, cylindrical protrusion; 1012, fifth limiting groove; 201, first limiting groove; 202, second limiting groove; 203, anti-fall mechanism; 301, left limiting protrusion; 302, right limiting protrusion. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0027] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0030] In a specific embodiment of this utility model, reference is made to Figure 1 A shielding cover for a lidar includes a housing 1, an optical cover 2, and an optical window 3. Both the housing 1 and the optical cover 2 are hollowed out in the middle. Both the housing 1 and the optical cover 2 have hollowed-out surfaces on their front and rear sides. The front hollowed-out surface of the housing 1 and the rear hollowed-out surface of the optical cover 2 have the same shape, and the area of ​​the rear hollowed-out surface of the optical cover 2 is slightly larger than the area of ​​the front hollowed-out surface of the housing 1, so that the optical cover 2 can be embedded in the housing 1. The shape of the optical window 3 is similar to the shape of the rear hollowed-out surface of the optical cover 2, and the optical window 3 is located between the front hollowed-out surface of the housing 1 and the front hollowed-out surface of the optical cover 2.

[0031] In a preferred embodiment, the housing 1 and the optical cover 2 have a multi-layered structure from the outside in: an outermost bright tin layer, a middle nickel layer, and an innermost plastic layer. The bright tin layer is 3 μm thick and forms a dense oxide layer in the air to prevent further corrosion and protect the nickel layer and the substrate. The bright tin layer also has good conductivity, ensuring a low-impedance connection between the shield and the grounding path, enhancing the overall shielding effect. The nickel layer is also 3 μm thick and has excellent shielding performance against high-frequency electromagnetic waves, effectively absorbing and reflecting interference signals, reducing external electromagnetic interference on the lidar signal. Simultaneously, the nickel layer has high hardness, improving the wear resistance and structural strength of the shield. The combination of the bright tin layer and the nickel layer forms a "sacrificial layer" structure, with nickel providing electromagnetic shielding and mechanical support, and tin providing environmental protection and a soldering interface.

[0032] In a preferred embodiment, the optical window 3 includes an optical window body and a hydrophobic coating. The material of the optical window body includes, but is not limited to, quartz glass, borosilicate glass, polycarbonate, acrylic, cyclic olefin copolymers, etc. Covering the outer surface of the optical window body with the hydrophobic coating can prevent the surface of the optical window from being contaminated by severe thunderstorms and driving environment, thereby affecting the normal operation of the lidar.

[0033] In a specific embodiment of this utility model, reference is made to Figure 2 and Figure 3 The housing 1 comprises a top plate 11, a bottom plate 12, a left side plate 13, and a right side plate 14. These components are integrally welded together, with the welded surfaces on the left side plate 12 exhibiting a serrated shape. A first elastic limiting component 101 is provided at the leading end of the left side plate 11. This component has two elastic pieces; one end of each piece is fixedly connected to the leading end of the left side plate 13, forming a 45-degree angle with the inner wall of the left side plate 13; the other end of each piece bends towards the left side plate 13, forming an arc-shaped structure. A second elastic limiting component 102 is provided at the leading end of the right side plate 14. This component also has two elastic pieces; one end of each piece is fixedly connected to the leading end of the right side plate 13, forming a 45-degree angle with the inner wall of the right side plate 14; the other end of each piece bends towards the right side plate 14, forming an arc-shaped structure. The first elastic limiting component 101 and the second elastic limiting component 102 act on the left and right ends of the lidar module, respectively, to fix the lidar module. The first elastic limiting component 101 and the second elastic limiting component 102 have good elastic deformation characteristics. When the lidar tends to move to the side under the action of inertia and external force in a harsh driving environment, the first elastic limiting component 101 and the second elastic limiting component 102 increase their own elastic deformation degree, which can effectively counteract the movement tendency of the lidar and firmly fix the lidar in the housing 1.

[0034] The top plate of housing 1 has a first heat dissipation hole 105 and a second heat dissipation hole 106 arranged adjacent to each other in the center, and the bottom plate of housing 1 has a third heat dissipation hole 107 and a fourth heat dissipation hole 108 arranged adjacent to each other in the center. The first heat dissipation hole 105 and the third heat dissipation hole 107 are fully open. The second heat dissipation hole 106 and the fourth heat dissipation hole 108 are covered with a cover plate, which covers the surface of the heat dissipation hole. By adjusting the degree of coverage of the cover plate relative to the heat dissipation hole, the heat dissipation efficiency of the second heat dissipation hole 106 and the fourth heat dissipation hole 108 can be adjusted so that the lidar inside the housing is at the most suitable operating temperature.

[0035] The top plate of housing 1 is provided with an upwardly protruding third elastic limiting component 103, specifically, referring to... Figure 7The third elastic limiting component 103 is provided with four third elastic limiting grooves 1031; a third elastic limiting block 1032 surrounds adjacent third elastic limiting grooves 1031; the middle of the third elastic limiting block 1032 is raised upward to form an upper arch structure 1033. The bottom plate of the housing 1 is provided with a downwardly protruding fourth elastic limiting component 104, specifically, referring to... Figure 8 The fourth elastic limiting component 104 is provided with four fourth elastic limiting grooves 1041; a fourth elastic limiting block 1042 surrounds the adjacent fourth elastic limiting grooves 1041; the middle of the fourth elastic limiting block 1042 is raised downward to form a lower arch structure 1043.

[0036] In a specific embodiment of this utility model, reference is made to Figure 4 The optical cover 2 has a first limiting groove 201 on the inner side of its top. The upper arch structure 1033 can extend into the first limiting groove 201 of the optical cover 2. The optical cover 2 has a second limiting groove 202 on the inner side of its bottom. The lower arch structure 1043 can extend into the second limiting groove 202 of the optical cover 2, so that the optical cover 2 and the housing 1 are interlocked. Under the action of the elastic potential energy of the upper arch structure 1033 and the lower arch structure 1043, the relative position between the housing 1 and the optical cover 2 is not easy to change unless the elastic deformation of the third elastic limiting component 103 and the fourth elastic limiting component 104 is violently damaged.

[0037] The front of the optical cover 2 is provided with an anti-drop mechanism 203, which is integrated with the optical cover 2. The inner and outer contours of the anti-drop mechanism 203 are consistent with the shape of the front hollow surface of the optical cover 2, and are obtained by the optical cover 2 extending evenly inward along the outermost outer edge of the front hollow surface by a rated length. The optical window 3 is set in the anti-drop mechanism 203 along the optical cover inward. The inner diameter of the anti-drop mechanism 203 is smaller than the outer diameter of the optical window 3, which can effectively prevent the optical window 3 from falling.

[0038] In a specific embodiment of this utility model, a fifth elastic limiting component 109 is provided at the tail end of the top plate of the housing 1. The fifth elastic limiting component 109 is composed of several elastic sheets, one end of which is connected to the housing 1, and the other end of which extends into the housing. A sixth elastic limiting component 1010 is provided at the tail end of the bottom plate of the housing 1. The sixth elastic limiting component 1010 is composed of several elastic sheets, one end of which is connected to the housing 1, and the other end of which extends into the housing. The power module and storage module electrically connected to the lidar are clamped between the fifth elastic limiting component 109 and the sixth elastic limiting component 1010. Under harsh driving conditions, the elastic potential energy can counteract the movement tendency of the power module and storage module, firmly fixing them inside the housing.

[0039] In a preferred embodiment, a cylindrical protrusion 1011 is provided at the middle position of the fifth elastic limiting component 109 and the sixth elastic limiting component 1010. The degree of protrusion of the cylindrical protrusion 1011 is between the maximum elastic deformation degree and the minimum elastic deformation degree of the fifth elastic limiting component 109 and the sixth elastic limiting component 1010, which can prevent the fifth elastic limiting component 109 and the sixth elastic limiting component 1010 from being over-deformed.

[0040] In a specific embodiment of this utility model, reference is made to Figure 5 and Figure 6 The optical window 3 has a left limiting protrusion 301 on its left edge and a right limiting protrusion 302 on its right edge. The left and right edges of the housing 1 are provided with a fifth limiting groove 1012, which can accommodate the left limiting protrusion 301 and the right limiting protrusion 302. The optical window 3 is fitted into the housing with the cooperation of the fifth limiting groove and the limiting protrusion to fix the optical window 3.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A shielding cover for a lidar system, characterized in that, The device includes a housing, an optical cover, and an optical window. The housing has a hollow center. A first elastic limiting component is located at the front end of the left side plate of the housing, bending inwards. A second elastic limiting component is located at the front end of the right side plate of the housing, also bending inwards. The first and second elastic limiting components act on the left and right ends of a lidar module, respectively, to fix the lidar module. The top plate of the housing has adjacent first and second heat dissipation holes at its center. The bottom plate of the housing has adjacent third and fourth heat dissipation holes at its center. The front end of the top plate of the housing has an upward-protruding third elastic limiting component, and the front end of the bottom plate of the housing has a downward-protruding fourth elastic limiting component. The front end of the top plate of the optical cover protrudes upwards, forming a first limiting groove. The front end of the bottom plate of the optical cover protrudes downwards, forming a second limiting groove. The third elastic limiting component and the first limiting groove are vertically aligned, and the fourth elastic limiting component and the second limiting groove are vertically aligned, thus covering the hollow surface of the housing with the optical cover. The optical window is located between the hollowed-out surface of the housing and the hollowed-out surface of the optical cover; The front of the optical cover is provided with a drop protection mechanism; the drop protection mechanism is integrally connected with the top plate, the bottom plate and the side plate of the optical cover; the drop protection mechanism extends uniformly inward along the outermost periphery of the optical cover by a rated length.

2. The shielding cover for a lidar according to claim 1, characterized in that, The housing and optical cover have a multi-layer structure from the outside in, consisting of a bright tin layer, a nickel layer, and a plastic layer.

3. The shielding cover for a lidar according to claim 2, characterized in that, The thickness of the bright tin layer is 3 μm, and the thickness of the nickel layer is 3 μm.

4. The shielding cover for a lidar according to claim 1, characterized in that, The top plate and bottom plate of the housing are respectively provided with a fifth elastic limiting component and a sixth elastic limiting component; the power module and the storage module, which are electrically connected to the lidar, are fixed between the fifth elastic limiting component and the sixth elastic limiting component.

5. The shielding cover for a lidar according to claim 1, characterized in that, The optical window includes an optical window body and a hydrophobic coating, the hydrophobic coating covering the outer surface of the optical window body.

6. The shielding cover for a lidar according to claim 1, characterized in that, Both the left and right sides of the housing are provided with limiting grooves, and the optical window is confined within the limiting grooves.

7. The shielding cover for a lidar according to claim 4, characterized in that, Both the fifth and sixth elastic limiting components have cylindrical protrusions at their middle positions to prevent excessive deformation of the fifth and sixth elastic limiting components.

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