Laser radar

Abstract

The utility model provides a laser radar, which comprises a first shell, a second shell, a third shell, a laser emission plate and an interface plate, and is characterized in that the laser emission plate and the interface plate are positioned in an internal cavity of the laser radar; the first boss on the first shell abuts against the second boss on the second shell. The third shell comprises a substrate and a third boss formed by extending on the substrate; the first side of the interface board comprises an electromagnetic sensitive element, the second side of the interface board is electrically connected with the laser emission board, and the electromagnetic sensitive element is located in a shielding cavity defined by the substrate, the third boss and the first side of the interface board. According to the laser radar, high-frequency interference signals generated by internal elements can be prevented from being leaked from the shell gap or the interface board, and the electromagnetic shielding performance of the laser radar is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of laser radar, and in particular relates to a laser radar. Background Art

[0002] Laser radar is mainly composed of a laser transmitting board, a receiving component and an information processing system. The laser in the laser transmitting board is used to convert electrical pulses into laser pulses, and emit laser pulses to the target to be measured through the corresponding transmitting lens. The echo light beam reflected by the target to be measured is received by the receiving component to form an echo signal. The information processing system is used to determine the target's distance and / or reflectivity and other information based on the echo signal.

[0003] The continuous improvement of LiDAR detection performance has made the rise time of electric pulses shorter and shorter. At present, the rise time of electric pulses has been reduced to picoseconds. The shorter the rise time, the greater the electromagnetic compatibility (EMC) high-order harmonic energy contained, which puts higher requirements on the electromagnetic shielding performance of LiDAR. Utility Model Content

[0004] The purpose of the utility model is to provide a laser radar, aiming to improve the electromagnetic shielding performance of the laser radar.

[0005] The embodiment of the utility model provides a laser radar, which includes a first shell, a second shell, a third shell, a laser emitting board and an interface board, wherein the laser emitting board and the interface board are located in an internal chamber of the laser radar;

[0006] The first shell includes a first boss extending along a first direction, and the second shell includes a second boss, wherein a conductive rubber strip is filled between the first boss and the second boss;

[0007] The third housing includes a substrate and a third boss, wherein the third boss is formed on the substrate and extends along a second direction, and the second direction is perpendicular to the first direction;

[0008] The first side of the interface board includes an electromagnetic sensitive element, and the second side of the interface board is electrically connected to the laser emitting board, wherein the electromagnetic sensitive element is located in a shielding cavity formed by the substrate, the third boss and the first side of the interface board.

[0009] In some embodiments, the third boss includes a first bonding edge, and the first side of the interface board includes a second bonding edge; the first bonding edge includes a plurality of protrusions distributed at circumferential intervals along the first bonding edge, and the second bonding edge includes a plurality of copper-exposed points distributed at circumferential intervals along the second bonding edge, wherein one of the protrusions abuts against one of the copper-exposed points.

[0010] In some embodiments, one of the conductive adhesive strips is located between two adjacent bumps.

[0011] In some embodiments, the first joint edge further includes a plurality of positioning posts, and the second joint edge further includes a plurality of positioning holes, wherein one positioning post is embedded in one positioning hole.

[0012] In some embodiments, the laser radar also includes a first sealing rubber ring; the first shell also includes a fourth boss extending along the first direction, and the second shell also includes a first groove arranged opposite to the fourth boss, and the first sealing rubber ring is filled between the fourth boss and the first groove.

[0013] In some embodiments, the first projection is located within the area enclosed by the edge of the second projection, wherein the first projection is the projection of the second boss on a plane perpendicular to the first direction, and the second projection is the projection of the first groove on a plane perpendicular to the first direction.

[0014] In some embodiments, the laser radar also includes a second sealing rubber ring; the substrate also includes a fifth boss extending along the second direction, and the first shell also includes a second groove arranged opposite to the fifth boss, and the second sealing rubber ring is filled between the fifth boss and the second groove.

[0015] In some embodiments, the third projection is located within the area enclosed by the edge of the fourth projection, wherein the third projection is the projection of the third boss on a plane perpendicular to the second direction, and the fourth projection is the projection of the fifth boss on a plane perpendicular to the second direction.

[0016] In some embodiments, the first side of the interface board further includes a shielding cover, and the electromagnetic sensitive element is located inside the shielding cover.

[0017] In some embodiments, the electromagnetic sensitive element is an Ethernet interface component, and the substrate includes an opening communicating with the shielding cavity, wherein the opening is arranged corresponding to the Ethernet interface component.

[0018] Compared with the prior art, the embodiment of the utility model has the following beneficial effects: the first shell and the second shell are bonded and electrically conductive based on multiple conductive adhesive strips, which can prevent high-frequency interference signals from leaking from the gap between the shells, and realize electromagnetic shielding between the internal chamber of the shells and the external environment. The substrate, the third boss and the interface board form a shielding cavity, which can prevent high-frequency interference signals from coupling to the electromagnetic sensitive components on the interface board and being transmitted and emitted outwardly through the external wiring harness, effectively improving the electromagnetic shielding performance of the laser radar. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of the structure of a laser radar provided in an embodiment of the utility model;

[0021] Figure 2 A schematic diagram of the structure of a laser radar provided in an embodiment of the utility model;

[0022] Figure 3 A schematic diagram of the structure of a first housing provided in an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the structure of the second housing provided in an embodiment of the utility model;

[0024] Figure 5 A schematic diagram of the connection structure between the first shell and the second shell provided in an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the structure of a third housing provided in an embodiment of the utility model;

[0026] Figure 7 A schematic diagram of the structure of the interface board provided by the embodiment of the utility model;

[0027] Figure 8 A schematic diagram of the connection structure between the third housing and the interface board provided in an embodiment of the utility model;

[0028] Fig. 9 A schematic diagram of the connection structure between the third housing and the interface board provided in an embodiment of the utility model.

[0029] Among them, the reference numerals in the figures are:

[0030] 11. First shell; 111. First boss; 112. Second groove; 113. Fourth boss; 12. Second shell; 121. Second boss; 122. First groove; 13. Third shell; 131. Third boss; 1311. Bump; 1312. Positioning column; 132. Base plate; 133. Fifth boss; 134. Heat dissipation column; 14. Interface board; 141. Shielding cover; 142. Positioning hole; 143. Copper exposed point; 15. First sealing rubber ring; 16. Second sealing rubber ring; 17. Conductive rubber strip; 18. Screw hole. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are only examples of structures consistent with some aspects of the present application as detailed in the attached claims.

[0032] The laser transmitting board is the biggest interference source in the laser radar. The interference signal generated by the laser will directly radiate outward from the gap of the laser radar or couple to the interface board connected to the external wiring harness. The electromagnetic sensitive components on the interface board (such as the common mode inductor in the Ethernet interface) are very sensitive to such interference signals, which will cause electromagnetic radiation to be transmitted and emitted from the Ethernet cable, affecting the electromagnetic compatibility test results of the laser radar.

[0033] In one embodiment, the utility model discloses a laser radar, such as Figure 1 and Figure 2 As shown, the laser radar includes a first shell 11, a second shell 12, a third shell 13 and an interface board 14. The first shell 11 covers the second shell 12 along a first direction (such as a vertical direction), and the third shell 13 covers the first shell 11 along a second direction (such as a horizontal direction). The multiple shells together form an internal chamber of the laser radar, and the interface board is located in the internal chamber, wherein the first direction is perpendicular to the second direction.

[0034] In one example, the internal chamber of the laser radar also includes a laser emitting board, a receiving component and a digital circuit board, wherein the digital circuit board is electrically connected to the laser emitting board, and the digital circuit board is electrically connected to the interface board. The second shell 12 also includes a mounting frame extending in the first direction. When the first shell 11 and the second shell 12 are covered, the mounting frame is located in the internal chamber formed by the first shell 11, the second shell 12 and the third shell 13, and the mounting frame is used to fix and install functional components such as the laser emitting board, the receiving component, the interface board and the digital circuit board. The laser emitting board also includes a laser, and the laser emits a scanning beam outward through the opening on the first shell 11. The digital circuit board includes a processing module for controlling the laser emitting board and the receiving component to realize the transmission and reception of the laser beam and determine the distance and / or reflectivity of the target according to the echo signal and the transmission and reception time. In another example, the laser radar also includes a first sealing rubber ring and a second sealing rubber ring, wherein the first sealing rubber ring is located between the first shell 11 and the second shell 12, and the second sealing rubber ring is located between the first shell 11 and the third shell 13, for achieving waterproof and dustproof sealing. The first shell 11 and the second shell 12, and the first shell 11 and the third shell 13 are sealed by screw locking, clamping, etc. The first sealing rubber ring or the second sealing rubber ring is annular and arranged around the inner chamber of the laser radar. In another example, the first sealing rubber ring or the second sealing rubber ring is formed by a plurality of sealing rubber strips arranged around the inner chamber of the laser radar and abutting each other end to end.

[0035] Figure 1 When the laser radar shown in the figure is in normal working state, the high-order harmonic signal generated by the laser is easy to radiate outward through the gap between the shells, affecting the electromagnetic shielding performance of the laser radar. To solve this technical problem, in one embodiment, an electromagnetic shielding structure is designed for the first shell 11 and the second shell 12, such as Figures 3 to 5 As shown, the first shell 11 includes a first boss 111 extending in the first direction, and the second shell 12 includes a second boss 121 extending in the first direction, wherein the first boss 111 and the second boss 121 are arranged circumferentially around the internal chamber. A conductive rubber strip 17 is filled between the abutting surfaces of the first boss 111 and the second boss 121 to achieve contact conduction. Only the opening on the first shell 11 for passing the scanning beam emitted by the laser is connected to the external environment, and the high-order harmonic signal cannot overflow from the gap between the first shell 11 and the second shell 12.

[0036] In some embodiments, Figure 1The interface board 14 is provided with an Ethernet interface for connecting an external wiring harness and transmitting signals. The signal types transmitted may be clock signals, enable signals, data signals, etc. Among them, the common-mode inductor in the Ethernet interface is usually used to suppress the common-mode interference in the Ethernet interface circuit, but due to its winding structure, it is easy to capture high-frequency interference signals, resulting in the interference signals being transmitted outward from the external wiring harness connected to the Ethernet interface. To this end, it is necessary to separate this electromagnetic sensitive element (common-mode inductor) from the internal chamber of the laser radar. In one embodiment, the third housing 13 includes a substrate and a third boss formed on the substrate extending along the second direction, and the third boss is arranged along the circumference of the substrate. When the first housing 11, the third housing 13 and the interface board 14 are assembled, the substrate and the first housing 11 can be detachably installed based on screw locking, card connection, etc., and the third boss and the interface board 14 can be detachably installed based on screw locking, card connection, etc. A second sealing rubber ring is also filled between the substrate and the first housing 11 to achieve waterproof and dustproof sealing. In one example, the first end of the interface board 14 includes an electromagnetic sensitive element. The second end of the interface board 14 faces the internal chamber of the laser radar and is electrically connected to the digital circuit board through a wiring interface. That is, the electromagnetic sensitive element is located in a shielding cavity formed by the substrate, the third boss and the interface board 14, and is separated from the internal chamber of the laser radar. The shielding cavity can electromagnetically isolate the interference signal generated by the laser, prevent the interference signal from being transmitted to the interface board 14 through spatial coupling, and then block the electromagnetic interference signal from being transmitted and emitted outward through the electromagnetic sensitive element and the external wiring harness. In another example, an opening connected to the shielding cavity is also provided on the substrate, and the opening is arranged corresponding to the Ethernet interface component, and is used to accommodate an Ethernet cable connected to the Ethernet interface component.

[0037] In one embodiment, a partial cross-section of the connection structure of the first shell 11 and the second shell 12 is as follows: Figure 5 As shown, the first shell 11 includes a first boss 111 extending along the first direction and a fourth boss 113 extending along the first direction. The second shell 12 includes a second boss 121 and a first groove 122. The first projection is located in the area enclosed by the edge of the second projection, wherein the first projection is the projection of the second boss 121 on a plane perpendicular to the first direction, and the second projection is the projection of the first groove 122 on a plane perpendicular to the first direction. The fourth boss 113 is embedded in the first groove 122, and a first sealing rubber ring 15 is also filled between the first groove 122 and the fourth boss 113 to achieve waterproof and dustproof sealing. In one example, an annular conductive rubber strip 17 is arranged along the circumference of the first boss 111 and filled between the first boss 111 and the second boss 121. In another example, a plurality of conductive rubber strips 17 are distributed at intervals along the circumference of the first boss 111 and filled between the first boss 111 and the second boss 121.

[0038] In one embodiment, when the first shell 11 and the second shell 12 are fixedly connected based on screws, the fourth boss 113 squeezes the first sealing rubber ring 15 so that it fills the gap between the first groove 122 and the fourth boss 113. In one example, the length of the first sealing rubber ring 15 along the second direction is greater than the groove width of the first groove 122 along the second direction, or the length of the first sealing rubber ring 15 along the first direction is greater than the groove height of the first groove 122 along the first direction. In conjunction with the limiting effect of the fourth boss 113 on the first sealing rubber ring 15, the first sealing rubber ring 15 is fully filled in the gap between the fourth boss 113 and the first groove 122 when squeezed, preventing the sealing failure caused by the loosening of the sealing rubber ring. In another example, the first sealing rubber ring 15 is also filled with conductive particles, which forms a multiple sealing structure while achieving waterproof and dustproof sealing, further enhancing the electromagnetic shielding performance of the laser radar.

[0039] In one embodiment, Figures 6 to 8 As shown, the substrate 132 further includes a fifth boss 133 extending in the second direction, wherein the length of the third boss 131 in the second direction is greater than the length of the fifth boss 133 in the second direction. The third projection is located in the area enclosed by the edge of the fourth projection, wherein the third projection is the projection of the third boss 131 on a plane perpendicular to the second direction, and the fourth projection is the projection of the fifth boss 133 on a plane perpendicular to the second direction.

[0040] In one embodiment, the first shell 11 also includes a second groove 112 arranged opposite to the fifth boss 133. When the first shell 11 and the third shell 13 are fixedly connected based on screws, the fifth boss 133 squeezes the second sealing rubber ring 16 to fill the gap between the second groove 112 and the fifth boss 133. In one example, the length of the second sealing rubber ring 16 along the second direction is greater than the groove height of the second groove 112 along the second direction, or the length of the second sealing rubber ring 16 along the first direction is greater than the groove width of the second groove 112 along the first direction. With the limiting effect of the fifth boss 133 on the second sealing rubber ring 16, the second sealing rubber ring 16 is fully filled in the gap between the fifth boss 133 and the second groove 112 when squeezed, preventing the sealing failure caused by the loosening of the sealing rubber ring. In another example, the second sealing rubber ring 16 is also filled with conductive particles, and a multiple sealing structure is formed while achieving waterproof and dustproof sealing, further enhancing the electromagnetic shielding performance of the laser radar.

[0041] In one embodiment, Fig. 9As shown, the first joint edge of the third boss 131 includes a plurality of protrusions 1311 extending along the second direction and arranged at intervals around the shielding cavity (along the circumference of the first joint edge), and the second joint edge of the interface board 14 includes a plurality of copper-exposed points 143 arranged at intervals around the shielding cavity (along the circumference of the second joint edge), and one protrusion 1311 abuts against one copper-exposed point 143. The interface board 14 is subjected to a window-opening copper-exposed treatment by laser etching, ion etching or chemical etching, so as to form a plurality of copper-exposed points 143. When the third housing 13 and the interface board 14 are screwed together, the protrusions 1311 abut against the copper-exposed points 143 to achieve contact conduction, thereby improving the electromagnetic shielding effect of the interference signal. The material hardness of the third housing 13 is greater than that of the interface board 14. Under the pressure of the screws, the protrusions 1311 will be partially or completely embedded in the corresponding position of the copper-exposed points 143 of the interface board 14. In one example, a conductive rubber strip 17 is filled between the first joint edge and the second joint edge, and the conductive rubber strip is arranged along the circumference of the first joint edge. The contact and conduction between the convex point 1311 and the corresponding copper exposed point 143 are achieved based on the conductive rubber strip 17. In another example, a plurality of conductive rubber strips 17 are filled between the first joint edge and the second joint edge, wherein one conductive rubber strip 17 is filled between two adjacent convex points 1311. The size of the conductive rubber strip 17 is less than or equal to the size of the gap between the two convex points 1311, thereby improving the electromagnetic shielding effect on interference signals.

[0042] In one embodiment, in order to simplify the installation process of the interface board 14 and the third boss 131, as shown in FIG. Figure 6 and Figure 7 As shown, the third boss 131 also includes a positioning column 1312, and the positioning column 1312 is arranged corresponding to the mounting hole 142 on the interface board 14. When the interface board 14 is abutted against the third boss 131, the positioning and installation are achieved by passing the positioning column 1312 through the mounting hole 142 on the interface board 14. In one example, the height of the positioning column 1312 is set according to the thickness of the interface board 14, and the height of the positioning column 1312 is less than or equal to the thickness of the interface board 14, that is, when the interface board 14 is positioned and installed, no additional positioning column 1312 is exposed on the surface of the second end of the interface board 14. The third boss 131 also includes a plurality of screw holes 18, and the corresponding position of the interface board 14 also includes screw holes 18. When the third boss 131 is fixedly installed with the interface board 14, the installation of the interface board 14 is completed by screwing the screws. In another embodiment, the base plate 132 also includes a plurality of heat dissipation columns 134, and the heat dissipation columns 134 located in the shielding cavity abut against the surface of the interface board 14 to achieve contact heat dissipation.

[0043] In one embodiment, Figure 7As shown, the interface board 14 also includes a shielding cover 141, which is located in a shielding cavity formed by the interface board 14 and the third boss 131. The electromagnetic sensitive element is located in the shielding cover 141. The shielding cavity is used to reduce the coupling of high-frequency interference signals to the interface board 14 through space. The shielding cover 141 is used to further block the coupling path of the interference signal, realize a multiple electromagnetic shielding structure, and improve the anti-interference ability of the interface board 14 to the interference signal.

[0044] Compared with the prior art, the embodiment of the utility model has the following beneficial effects: the laser radar includes a first shell 11, a second shell 12, a third shell 13 and an interface board 14, and the multiple shells are enclosed to form an internal chamber of the laser radar, the first shell 11 and the second shell 12 are covered along the first direction, and the first shell 11 and the third shell 13 are covered along the second direction, and the first boss 111 extending from the first shell 11 and the second boss 121 extending from the second shell 12 are in contact and conductive, so as to prevent high-frequency interference signals from leaking from the gap of the electromagnetic shielding structure, and realize electromagnetic shielding between the shell and the outside. The third boss 131 and the interface board 14 form a shielding cavity, and the shielding cavity is not connected to the internal chamber of the laser radar, so as to realize electromagnetic shielding of the interference signal generated by the laser, prevent the interference signal from coupling to the electromagnetic sensitive element on the interface board 14 and being transmitted and emitted outward through the wire harness connected to the electromagnetic sensitive element, and improve the electromagnetic shielding performance of the laser radar.

[0045] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention.

[0046] In the description of the present application, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present application. The terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. It should be noted that when an element is referred to as "fixed to" or "set to" another element, it can be directly on another element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to another element or indirectly connected to the other element. It should be understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Among them, the first feature "on" or "below" the second feature can include the first and second features directly contacting, and can also include the first and second features not being directly contacting but contacting through another feature between them. Moreover, the first feature being “above”, “above” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being “below”, “below” and “below” the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] The terms "and / or" and "and / or" used in this document describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. The singular forms of "one" and "an" are also intended to include plural forms, unless the context clearly indicates otherwise. When the terms "comprising" and / or "including" are used in this specification, they indicate the presence of the features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof, i.e., any and all combinations of one or more related listed items. The ordinals such as "first" and "second" cited in the embodiments of the present application are merely identifiers and do not refer to other meanings such as a specific order or imply relative importance.

[0048] For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances. The "one or more embodiments" used herein do not refer to the same embodiment, but are based on any suitable combination of specific features, structures or characteristics. The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A laser radar, characterized in that: The laser radar comprises a first shell, a second shell, a third shell, a laser emitting board and an interface board, wherein the laser emitting board and the interface board are located in an internal chamber of the laser radar; The first shell includes a first boss extending along a first direction, and the second shell includes a second boss, wherein a conductive rubber strip is filled between the first boss and the second boss; The third housing includes a substrate and a third boss, wherein the third boss is formed on the substrate and extends along a second direction, and the second direction is perpendicular to the first direction; The first side of the interface board includes an electromagnetic sensitive element, and the second side of the interface board is electrically connected to the laser emitting board, wherein the electromagnetic sensitive element is located in a shielding cavity formed by the substrate, the third boss and the first side of the interface board.

2. The laser radar according to claim 1, characterized in that The third boss includes a first engagement edge, and the first side of the interface plate includes a second engagement edge; The first joint edge includes a plurality of protrusions distributed at intervals along the circumference of the first joint edge, and the second joint edge includes a plurality of copper-exposed points distributed at intervals along the circumference of the second joint edge, wherein one protrusion abuts against one copper-exposed point.

3. The laser radar according to claim 2, characterized in that One of the conductive rubber strips is located between two adjacent protrusions.

4. The laser radar according to claim 2, characterized in that The first joint edge further includes a plurality of positioning posts, and the second joint edge further includes a plurality of positioning holes, wherein one positioning post is embedded in one positioning hole.

5. The laser radar according to claim 1, characterized in that: The laser radar also includes a first sealing rubber ring; The first shell further includes a fourth boss extending along the first direction, the second shell further includes a first groove arranged opposite to the fourth boss, and the first sealing rubber ring is filled between the fourth boss and the first groove.

6. The laser radar according to claim 5, characterized in that The first projection is located in an area enclosed by an edge of the second projection, wherein the first projection is a projection of the second boss on a plane perpendicular to the first direction, and the second projection is a projection of the first groove on a plane perpendicular to the first direction.

7. The laser radar according to claim 1, characterized in that The laser radar also includes a second sealing rubber ring; The substrate further includes a fifth boss extending along the second direction, the first housing further includes a second groove arranged opposite to the fifth boss, and the second sealing rubber ring is filled between the fifth boss and the second groove.

8. The laser radar according to claim 7, characterized in that: The third projection is located within the area enclosed by the edge of the fourth projection, wherein the third projection is a projection of the third boss on a plane perpendicular to the second direction, and the fourth projection is a projection of the fifth boss on a plane perpendicular to the second direction.

9. The laser radar according to claim 1, characterized in that: The first side of the interface board further includes a shielding cover, and the electromagnetic sensitive element is located inside the shielding cover.

10. The laser radar according to claim 1, characterized in that: The electromagnetic sensitive element is an Ethernet interface component, and the substrate includes an opening communicating with the shielding cavity, wherein the opening is arranged corresponding to the Ethernet interface component.

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