Protection device of automobile laser radar

Abstract

The invention relates to an automobile laser radar protection device which comprises a laser radar and a protection shell, the laser radar is arranged in the protection shell, and a heat dissipation plate set is arranged on the protection shell; the driving mechanism is arranged in the protective shell; the cleaning frame set is arranged on the protective shell in a sliding mode, and the cleaning frame set is driven by a driving mechanism to move so as to clean the surface of the heat dissipation plate set; according to the protection device of the automobile laser radar, the driving mechanism drives the cleaning frame set to move, then the heat dissipation plate set is cleaned, and the heat dissipation effect is guaranteed on the premise that sealing of the laser radar is guaranteed. Meanwhile, opening and closing of the protection plate are achieved through the opening and closing mechanism, a cleaning cotton strip arranged in the protection plate can softly and effectively wipe the window of the laser radar in the moving process of the protection plate, when the protection plate is closed, the protection plate can play a protection role in time, a reliable protection barrier is formed for the window, and the protection effect is good. And the damage risk caused by accidental collision of an object to the window is effectively avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of lidar, and particularly relates to a protection device for an automotive lidar. Background Art

[0002] As a core sensor in the field of intelligent driving, on-vehicle lidar constructs an accurate three-dimensional point cloud image of the surrounding environment by emitting and receiving laser beams. When it works, the laser transmitter inside the device emits laser pulses in all directions. After hitting an obstacle, the laser is reflected back and captured by the receiver. Based on the time and angle information of the laser's round trip, data such as the distance, position, and shape of the target object can be accurately calculated.

[0003] On-vehicle lidar is usually externally installed on a vehicle. To ensure its service life, it is often hermetically sealed in a protective shell, leaving only a viewing window for detection. However, this sealing method causes the lidar to be unable to obtain an effective heat dissipation path. At the same time, the viewing window of the lidar is extremely prone to being contaminated with dust, stains, etc. To ensure the accuracy of lidar data collection, the viewing window needs to be regularly cleaned and maintained. For this reason, a protection device for an automotive lidar is proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a protection device for an automotive lidar that can clean the viewing window of the lidar and effectively dissipate heat while ensuring sealing.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A protection device for an automotive lidar includes a lidar and a protective shell. The lidar is disposed inside the protective shell, and a heat dissipation plate group is provided on the protective shell;

[0007] It further includes:

[0008] A driving mechanism, which is disposed inside the protective shell;

[0009] A cleaning frame group, which is slidably disposed on the protective shell. The cleaning frame group is driven by the driving mechanism to move and clean the surface of the heat dissipation plate group;

[0010] A protection plate, which is slidably disposed on the protective shell;

[0011] An opening and closing mechanism, which is disposed between the protection plate and the driving mechanism. The protection plate is driven by the driving mechanism to move on the protective shell.

[0012] As a further optimized solution of the present invention, the protective shell includes an upper shell, a lower shell is arranged below the upper shell, a receiving cavity is formed in the upper shell, a first installation groove is formed in the upper shell, an avoidance groove communicating with the receiving cavity is formed in the upper shell, a window installation opening is formed in the lower shell, a second installation groove is formed in the upper shell, and a dirt cleaning opening is formed in the upper shell.

[0013] As a further optimized solution of the present invention, the heat dissipation plate group includes side heat dissipation plates. The side heat dissipation plates are connected to the lower shell through the second installation groove. A top heat dissipation plate is arranged in the first installation groove. The side heat dissipation plates are closely attached to both sides of the lidar, and the top heat dissipation plate is closely attached to the top of the lidar.

[0014] As a further optimized solution of the present invention, the side heat dissipation plate includes an installation piece. The installation piece is arranged in the second installation groove. The installation piece is closely attached to both sides of the lidar. Trapezoidal ridges are arranged on both sides of the installation piece. Heat dissipation fins are slidably arranged on the installation piece through the trapezoidal ridges.

[0015] As a further optimized solution of the present invention, the driving mechanism includes a driving motor. The driving motor is arranged in the upper shell. A lead screw is rotatably arranged in the receiving cavity. The lead screw is connected to the output end of the driving motor. Slide bars are arranged on both sides of the lead screw.

[0016] As a further optimized solution of the present invention, the cleaning frame group includes a U-shaped frame. Both ends of the U-shaped frame penetrate through the upper shell through the avoidance groove. A plurality of mounting ears are arranged on the U-shaped frame. One of the mounting ears is threadedly connected to the lead screw, and the remaining mounting ears are slidably connected to the slide bars. Cleaning plates are arranged on the inner surface and both ends of the U-shaped frame. The cleaning plates at both ends of the U-shaped frame are slidably arranged on the U-shaped frame. Springs are arranged between the cleaning plates at both ends and the U-shaped frame. Semi-circular blocks are arranged on the cleaning plates. Grooves matching the side heat dissipation plates and the top heat dissipation plates are formed in the cleaning plates. A plurality of the cleaning plates are respectively slidably arranged on the side heat dissipation plates and the top heat dissipation plates.

[0017] As a further optimized solution of the present invention, a corrugated plate is arranged on the upper shell. The corrugated plate is arranged on both sides of the first installation groove. The semi-circular blocks are slidably arranged on the corrugated plate.

[0018] As a further optimized solution of the present invention, the opening and closing mechanism includes a cross bar. The cross bar is rotatably arranged through the upper shell. A worm is arranged at one end of the lead screw away from the driving motor. A turbine is arranged on the cross bar. The worm and the turbine are engaged with each other. Connecting plates are fixedly arranged at both ends of the cross bar. Activity grooves are formed in the connecting plates.

[0019] As a further optimization scheme of the present invention, protruding rods are arranged on both sides of the protective plate, and the protruding rods are slidably arranged in the movable grooves. A sliding block is arranged on the protective plate, and sliding grooves matching the sliding blocks are opened on the upper shell and the lower shell, and the sliding grooves are connected to each other.

[0020] As a further optimization solution of the present invention, a cleaning cotton strip is movably arranged in the protective plate, and the cleaning cotton strip can abut against the window of the laser radar.

[0021] The beneficial effects of the present invention are:

[0022] Different from the existing technology, in actual use, the driving mechanism drives the cleaning frame group to move, and then cleans the heat dissipation plate group, ensuring the heat dissipation effect under the premise of ensuring the sealing of the laser radar. At the same time, the opening and closing mechanism realizes the opening and closing of the protective plate, and the cleaning cotton strips built into the protective plate can gently and effectively wipe the laser radar window during the movement of the protective plate. When the protective plate is closed, the protective plate can immediately play a protective role, forming a reliable protective barrier for the window, effectively avoiding the risk of damage caused by objects accidentally hitting the window. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 The present invention Figure 1 Another structural diagram of the form;

[0025] Figure 3 The present invention Figure 2 Schematic diagram from another perspective;

[0026] Figure 4 The present invention Figure 2 Schematic diagram of split structure;

[0027] Figure 5 The present invention Figure 3 The enlarged structural diagram at A in the middle;

[0028] Figure 6 It is a schematic diagram of the structure of the side heat sink of the present invention;

[0029] Figure 7 It is a schematic diagram of the partial cross-sectional structure of the upper shell of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the upper shell of the present invention;

[0031] Figure 9 It is a schematic diagram of the disassembly structure of the cleaning rack assembly of the present invention;

[0032] Figure 10 It is a schematic diagram of the disassembly structure of the cleaning cotton strip of the present invention.

[0033] In the figure: 1, lidar; 2, protective housing; 21, upper housing; 211, accommodation cavity; 212, first installation groove; 213, avoidance groove; 22, lower housing; 221, window installation opening; 222, second installation groove; 23, dirt cleaning opening; 3, protection plate; 31, convex rod; 32, slider; 33, chute; 4, cleaning frame group; 41, U-shaped frame; 42, cleaning plate; 421, spring; 422, semi-circular block; 43, installation ear; 5, opening and closing mechanism; 51, cross bar; 52, worm; 521, turbine; 53, connecting plate; 531, movable groove; 6, driving mechanism; 61, driving motor; 62, lead screw; 63, slide bar; 7, heat dissipation plate group; 71, side heat dissipation plate; 711, heat sink fin; 712, installation piece; 713, trapezoidal ridge; 72, top heat dissipation plate; 8, cleaning cotton strip; 9, corrugated plate. Specific embodiments

[0034] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0035] Embodiment 1

[0036] As Figure 1 - Figure 10 shown, a protection device for an automotive lidar includes a lidar 1 and a protective housing 2. The lidar 1 is arranged inside the protective housing 2, and a heat dissipation plate group 7 is arranged on the protective housing 2;

[0037] It further includes:

[0038] A driving mechanism 6, which is arranged inside the protective housing 2;

[0039] A cleaning frame group 4, which is slidably arranged on the protective housing 2. The cleaning frame group 4 is driven by the driving mechanism 6 to move, so as to clean the surface of the heat dissipation plate group 7;

[0040] A protection plate 3, which is slidably arranged on the protective housing 2;

[0041] An opening and closing mechanism 5, which is arranged between the protection plate 3 and the driving mechanism 6. The protection plate 3 is driven by the driving mechanism 6 to move on the protective housing 2.

[0042] As Figure 7 - Figure 8As shown in the figure, the protective shell 2 includes an upper shell 21. A lower shell 22 is arranged below the upper shell 21. A waterproof rubber ring (not shown in the figure) is arranged between the upper shell 21 and the lower shell 22. An accommodation cavity 211 is formed on the upper shell 21. An installation groove one 212 is formed on the upper shell 21. An avoidance groove 213 communicating with the accommodation cavity 211 is formed on the upper shell 21. The accommodation cavity 211 and the avoidance groove 213 provide a movement space for the internal mechanism. A window installation opening 221 is formed on the lower shell 22 to provide an installation space for the window of the lidar 1. An installation groove two 222 is formed on the upper shell 21. A dirt cleaning opening 23 is formed on the upper shell 21. The dirt cleaned from the top heat dissipation plate 72 is discharged through the provided dirt cleaning opening 23. At the same time, the rainwater entering the accommodation cavity 211 can be discharged through it. The upper shell 21 and the lower shell 22 seal the lidar as a whole. The significant advantage is that it provides a reliable physical protection barrier for the lidar. At the same time, the upper shell 21 and the lower shell 22 facilitate the installation and connection between various structures.

[0043] As Figure 4 shown in the figure, the heat dissipation plate group 7 includes side heat dissipation plates 71. The side heat dissipation plates 71 are connected to the lower shell 22 through the installation groove two 222. A top heat dissipation plate 72 is arranged in the installation groove one 212. Through the modular installation design, it is convenient to replace or upgrade the heat dissipation plate group 7. The side heat dissipation plates 71 are closely attached to both sides of the lidar 1. The top heat dissipation plate 72 is closely attached to the top of the lidar 1. By closely attaching to both sides and the top of the key heat - generating parts of the lidar, an efficient heat dissipation path is provided for the lidar 1 in a limited sealed space.

[0044] As Figure 7 - Figure 8 shown in the figure, the driving mechanism 6 includes a driving motor 61. The driving motor 61 is arranged inside the upper shell 21. A lead screw 62 is rotatably arranged in the accommodation cavity 211. The lead screw 62 is connected to the output end of the driving motor 61. Slide rods 63 are arranged on both sides of the lead screw 62, converting the rotational motion of the driving motor 61 into the linear motion of the cleaning frame group 4, with high transmission precision and strong stability. At the same time, the window of the lidar 1 can be cleaned at any time when it is dirty.

[0045] As Figure 9As shown in the figure, the cleaning rack group 4 includes a U-shaped rack 41. Both ends of the U-shaped rack 41 penetrate through the upper housing 21 via the avoidance grooves 213. A plurality of mounting ears 43 are provided on the U-shaped rack 41. One of the mounting ears 43 is threadedly connected to the lead screw 62, and the remaining mounting ears 43 are slidably connected to the slide rod 63, ensuring the stable movement track of the U-shaped rack 41 and preventing deviation. Cleaning plates 42 are provided on the inner surface and both ends of the U-shaped rack 41. The cleaning plates 42 are respectively located on both sides and the top of the inner surface of the U-shaped rack 41. In this way, when the U-shaped rack 41 moves, the surfaces of the side heat dissipation plates 71 and the top heat dissipation plate 72 are cleaned. The cleaning plates 42 at both ends of the U-shaped rack 41 are slidably arranged on the U-shaped rack 41. A spring 421 is provided between the cleaning plates 42 at both ends and the U-shaped rack 41, so that the cleaning plates 42 at both ends of the U-shaped rack 41 can have a certain displacement on the U-shaped rack 41. Semi-circular blocks 422 are provided on the cleaning plates 42. A plurality of cleaning plates 42 are respectively slidably arranged on the side heat dissipation plates 71 and the top heat dissipation plate 72. Grooves matching the side heat dissipation plates 71 and the top heat dissipation plate 72 are formed on the cleaning plates 42. In this way, when the cleaning plates 42 move, they can penetrate into the grooves on the surfaces of the side heat dissipation plates 71 and the top heat dissipation plate 72 to thoroughly clean the dirt and maintain the high-efficiency heat dissipation performance of the heat dissipation plate group 7.

[0046] As Figure 7 - Figure 9 shown, the side heat dissipation plate 71 includes a mounting piece 712. The mounting piece 712 is arranged in the second mounting groove 222. The mounting piece 712 is closely attached to both sides of the lidar 1. Trapezoidal ridges 713 are provided on both sides of the mounting piece 712. Heat dissipation fins 711 are slidably arranged on the mounting piece 712 through the trapezoidal ridges 713. A corrugated plate 9 is provided on the upper housing 21. The corrugated plate 9 is arranged on both sides of the first mounting groove 212. The semi-circular blocks 422 are slidably arranged on the corrugated plate 9. In this way, when the U-shaped rack 41 moves, the semi-circular blocks 422 move on the corrugated plate 9, and then drive the cleaning plates 42 at both ends of the U-shaped rack 41 to move up and down reciprocally. And because grooves matching the side heat dissipation plate 71 are formed on the cleaning plates 42, when the cleaning plates 42 reciprocate, the heat dissipation fins 711 move synchronously with the cleaning plates 42. In this way, the heat dissipation fins 711 move up and down reciprocally on the mounting piece 712 along the trapezoidal ridges 713, so that the heat dissipation fins 711 have a certain vibration effect to loosen the dirt on their surfaces and further improve the cleaning effect of the cleaning plates 42 on the side heat dissipation plate 71.

[0047] As Figure 10 shown, a cleaning cotton strip 8 is movably arranged in the protection plate 3. The cleaning cotton strip 8 can be in contact with the window of the lidar 1. In this way, during the opening and closing process of the protection plate 3, the built-in cleaning cotton strip 8 can wipe and clean the window. At the same time, the cleaning cotton strip 8 is movably connected to the protection plate 3, so that it is convenient to replace the cleaning cotton strip 8 during long-term use.

[0048] As Figure 4 - Figure 5As shown, the opening and closing mechanism 5 includes a cross bar 51 which is rotatably arranged through the upper housing 21. One end of the lead screw 62 away from the drive motor 61 is provided with a worm 52. A worm gear 521 is arranged on the cross bar 51. The worm 52 and the worm gear 521 are engaged with each other. Through the large reduction ratio between the worm 52 and the worm gear 521, the cross bar 51 can rotate slowly, avoiding mechanical damage to the cleaning cotton strip 8 and the window. At the same time, when the U-shaped frame 41 moves over a long distance, the connecting plate 53 can rotate by a limited angle. At the same time, the worm 52 and the worm gear 521 have a self-locking function, which can ensure that the protective plate 3 remains stable at any position, preventing misoperation caused by vehicle bumps. Both ends of the cross bar 51 are fixedly provided with connecting plates 53. An activity groove 531 is opened on the connecting plate 53. Through the provided activity groove 531, the protective plate 3 can be driven to move.

[0049] As Figure 4 - Figure 5 and Figure 10 As shown, convex rods 31 are arranged on both sides of the protective plate 3. The convex rods 31 are slidably arranged in the activity groove 531, thereby converting the rotation of the cross bar 51 into the translational motion of the protective plate. A slider 32 is arranged on the protective plate 3. Sliding grooves 33 matching the slider 32 are opened on both the upper housing 21 and the lower housing 22. The sliding grooves 33 are communicated with each other, thereby enabling the protective plate 3 to stably transition between the upper housing 21 and the lower housing 22. At the same time, the slider 32 is embedded in the sliding groove 33, with small sliding resistance and smooth opening and closing of the protective plate 3, avoiding jamming.

[0050] It should be noted that for the protection device of the automotive lidar, the lidar 1 is arranged in the protection shell 2. The protection shell 2 is composed of an upper housing 21 and a lower housing 22. The lidar 1 is installed in the lower housing 22, and the window of the lidar 1 is embedded in the window installation opening 221. A sealing strip should be arranged at the edge of the window installation opening 221. The heat dissipation plate group 7 includes side heat dissipation plates 71 which are connected to the lower housing 22 through the second installation groove 222, and a top heat dissipation plate 72 which is arranged in the first installation groove 212, closely adhering to both sides and the top of the lidar 1 respectively.

[0051] When the vehicle is ignited and started, the drive motor 61 starts to drive the lead screw 62 to rotate. The lead screw 62 drives the U-shaped frame 41 to move under the guidance of the slide bar 63, and then drives the cleaning plate 42 to move on the surfaces of the side heat dissipation plate 71 and the top heat dissipation plate 72, cleaning the grooves on the surfaces of the side heat dissipation plate 71 and the top heat dissipation plate 72. At the same time, the semi-circular block 422 walks on the corrugated plate 9, and then drives the cleaning plates 42 at both ends of the U-shaped frame 41 to move up and down reciprocally. And because the cleaning plate 42 is provided with grooves matching the side heat dissipation plate 71, when the cleaning plate 42 reciprocates, the heat dissipation fins 711 reciprocate on the mounting plate 712, so that the heat dissipation fins 711 have a certain vibration effect, thereby loosening the dirt on their surfaces, further improving the cleaning effect of the cleaning plate 42 on the side heat dissipation plate 71, and preventing dirt from being embedded in the grooves of the side heat dissipation plate 71 and the top heat dissipation plate 72 and affecting their heat dissipation effect.

[0052] At the same time, the rotation of the lead screw 62 drives the worm 52 to rotate. The worm 52 drives the turbine 521 to make the cross bar 51 rotate slowly, thereby driving the connecting plates 53 at both ends of the cross bar 51. The movable slots 531 on the connecting plates 53 drive the protective plate 3 to slide in the chute 33 through the convex rods 31, realizing the opening and closing action of the protective plate 3. When the protective plate 3 moves, the cleaning cotton strip 8 inside the protective plate 3 can wipe and clean the window of the lidar 1.

[0053] When the vehicle shuts off, the drive motor 61 starts again and rotates in reverse, resetting the U-shaped frame 41 and the protective plate 3. During this process, the cleaning cotton strip 8 inside the protective plate 3 gently fits on the window surface again to perform secondary cleaning on the window of the lidar 1, removing the fine stains that may be contaminated during the vehicle's driving. After the U-shaped frame 41 and the protective plate 3 are both reset, the entire protection device enters the standby state, preparing for the normal operation of the lidar 1 when the vehicle starts next time, effectively extending the service life of the lidar 1 and ensuring its working stability in a complex environment.

[0054] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A protection device for an automotive lidar, comprising a lidar (1) and a protective housing (2), wherein the lidar (1) is disposed within the protective housing (2), and is characterized in that: A heat dissipation plate group (7) is provided on the protective case (2); It further includes: A driving mechanism (6), and the driving mechanism (6) is arranged inside the protective case (2); A cleaning frame group (4), and the cleaning frame group (4) is slidably arranged on the protective case (2), and the driving mechanism (6) is used to drive the cleaning frame group (4) to move so as to clean the surface of the heat dissipation plate group (7); A protective plate (3), and the protective plate (3) is slidably arranged on the protective case (2); An opening and closing mechanism (5), and the opening and closing mechanism (5) is arranged between the protective plate (3) and the driving mechanism (6), and the driving mechanism (6) is used to drive the protective plate (3) to move on the protective case (2).

2. The protection device for an automotive lidar according to claim 1, wherein: The protective case (2) includes an upper case (21), a lower case (22) is arranged below the upper case (21), a receiving cavity (211) is formed in the upper case (21), a first installation groove (212) is formed in the upper case (21), an avoidance groove (213) communicating with the receiving cavity (211) is formed in the upper case (21), a window installation opening (221) is formed in the lower case (22), a second installation groove (222) is formed in the upper case (21), and a dirt cleaning opening (23) is formed in the upper case (21).

3. The protection device for an automotive lidar according to claim 2, characterized in that: The heat dissipation plate group (7) includes side heat dissipation plates (71), the side heat dissipation plates (71) are connected to the lower case (22) through the second installation groove (222), a top heat dissipation plate (72) is arranged in the first installation groove (212), the side heat dissipation plates (71) are closely attached to both sides of the lidar (1), and the top heat dissipation plate (72) is closely attached to the top of the lidar (1).

4. The protection device for an automotive lidar according to claim 3, characterized in that: The side heat dissipation plate (71) includes installation pieces (712), the installation pieces (712) are arranged in the second installation groove (222), the installation pieces (712) are closely attached to both sides of the lidar (1), trapezoidal ridges (713) are arranged on both sides of the installation pieces (712), and heat dissipation fins (711) are slidably arranged on the installation pieces (712) through the trapezoidal ridges (713).

5. The protection device for an automotive lidar according to claim 2, wherein: The driving mechanism (6) includes a driving motor (61), the driving motor (61) is arranged inside the upper case (21), a lead screw (62) is rotatably arranged in the receiving cavity (211), the lead screw (62) is connected to the output end of the driving motor (61), and slide rods (63) are arranged on both sides of the lead screw (62).

6. The protection device for an automotive lidar according to claim 4, wherein: The cleaning rack group (4) includes a U-shaped rack (41). Both ends of the U-shaped rack (41) penetrate through the upper housing (21) via the avoidance grooves (213). A plurality of mounting ears (43) are arranged on the U-shaped rack (41). One of the mounting ears (43) is threadedly connected to the lead screw (62), and the remaining mounting ears (43) are slidably connected to the slide rod (63). Cleaning plates (42) are arranged on the inner surface and both ends of the U-shaped rack (41). The cleaning plates (42) at both ends of the U-shaped rack (41) are slidably arranged on the U-shaped rack (41). Springs (421) are arranged between the cleaning plates (42) at both ends and the U-shaped rack (41). Semicircular blocks (422) are arranged on the cleaning plates (42). Grooves matching the side heat dissipation plates (71) and the top heat dissipation plates (72) are formed on the cleaning plates (42). A plurality of the cleaning plates (42) are respectively slidably arranged on the side heat dissipation plates (71) and the top heat dissipation plates (72).

7. The protection device for an automotive lidar according to claim 6, characterized in that: A corrugated plate (9) is arranged on the upper housing (21). The corrugated plate (9) is arranged on both sides of the first mounting groove (212). The semicircular block (422) is slidably arranged on the corrugated plate (9).

8. The protection device for an automotive lidar according to claim 5, characterized in that: The opening and closing mechanism (5) includes a cross bar (51). The cross bar (51) is rotatably arranged through the upper housing (21). A worm (52) is arranged at one end of the lead screw (62) away from the driving motor (61). A worm gear (521) is arranged on the cross bar (51). The worm (52) and the worm gear (521) are engaged with each other. Connecting plates (53) are fixedly arranged at both ends of the cross bar (51). Moving grooves (531) are formed on the connecting plates (53).

9. The protection device for an automotive lidar according to claim 7, characterized in that: Convex rods (31) are arranged on both sides of the protective plate (3). The convex rods (31) are slidably arranged in the moving grooves (531). A slider (32) is arranged on the protective plate (3). Sliding grooves (33) matching the slider (32) are formed on both the upper housing (21) and the lower housing (22). The sliding grooves (33) communicate with each other.

10. The protection device for an automotive lidar according to claim 1, wherein: A cleaning cotton strip (8) is movably arranged inside the protective plate (3). The cleaning cotton strip (8) can abut against the window of the lidar (1).

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