Laser radar and heat conduction device

Abstract

The utility model provides a laser radar heat conduction device, and the device comprises an optical machine support which is in contact with a heat dissipation part; the heat conduction bracket and the ray machine bracket are arranged at an interval and are in contact with the heat dissipation part; the plurality of circuit boards are parallelly arranged between the ray machine support and the heat conduction support at intervals, each circuit board is used for arranging a plurality of lasers, and the plurality of lasers are linearly arranged on one side of the circuit board at intervals along the placement direction of the circuit board; the graphite flake comprises a contact part which is laid on one side, deviating from the laser, of the circuit board; the first extension part extends from the contact part to be in contact with the ray machine bracket along a first direction; and the second extension part extends from the contact part to be in contact with the heat conduction bracket along the second direction. The utility model also provides a laser radar.

Description

Technical Field

[0001] The present application relates to the field of laser radar, and in particular to a laser radar and a heat conducting device. Background Art

[0002] As one of the core sensors in autonomous driving systems, Lidar boasts advantages such as long detection range, high resolution, and 24 / 7 operation. Increasing the number of Lidar lines allows for denser point cloud resolution, enabling accurate perception of complex and changing driving environments. The conventional approach to achieving multi-line detection in mechanical Lidar is to arrange multiple lasers vertically and horizontally on the optical lens plane. Within the same space, the smaller the spacing between lasers and the greater the number of lasers, the greater the number of lines and the higher the line angle resolution.

[0003] In existing technologies, lasers require optical tuning due to tolerances in optical system manufacturing and assembly. Uncertainty in the positioning of the laser and its components makes it difficult to establish a fixed thermal connection. Furthermore, closely spaced lasers further complicate heat dissipation, making it difficult to dissipate heat. Utility Model Content

[0004] The present application provides a laser radar and a heat conducting device to solve the problems of fixed heat conducting connection and heat dissipation.

[0005] In a first aspect, the present application provides a laser radar heat conducting device, the laser radar heat conducting device comprising:

[0006] Optical machine bracket, in contact with heat dissipation components;

[0007] a heat-conducting bracket, spaced apart from the optical machine bracket and in contact with the heat dissipation component;

[0008] A plurality of circuit boards are arranged in parallel and at intervals between the optical machine bracket and the heat conductive bracket, each circuit board is used to set a plurality of lasers, and the plurality of lasers are arranged in a linear shape and at intervals on one side of the circuit board along the placement direction of the circuit board; and

[0009] A graphite sheet comprising: a contact portion, laid on a side of the circuit board facing away from the laser; a first extension portion, extending from the contact portion along a first direction to contact the optical machine bracket; and a second extension portion, extending from the contact portion along a second direction to contact the thermally conductive bracket.

[0010] Furthermore, the plurality of lasers are away from the heat-conducting bracket.

[0011] Furthermore, the circuit board is provided with an installation area near the edge for installing the plurality of lasers.

[0012] Furthermore, the circuit board is provided with a heat conduction hole, and the heat conduction hole passes through from the side of the circuit board where the laser is provided to the side where the graphite sheet is provided.

[0013] Furthermore, the first direction extends along one end of the circuit board, and the second direction extends along one side of the circuit board and bends toward the heat-conducting bracket.

[0014] Furthermore, the second extension portions of the graphite sheets corresponding to the circuit boards are stacked.

[0015] Furthermore, the graphite sheet is an integrally formed sheet.

[0016] Furthermore, the laser radar heat conduction device also includes a plurality of connecting columns arranged between the optical machine bracket and the heat conduction bracket, and the circuit board is also provided with a plurality of through holes, the connecting columns pass through the through holes and the two ends are respectively fixed to the optical machine bracket and the heat conduction bracket.

[0017] Furthermore, the first extension portion and the second extension portion are provided with adhesive backing for being attached to the optical machine bracket and the thermal conductive bracket.

[0018] In a second aspect, the present application also provides a laser radar comprising: a plurality of lasers; and the laser radar heat conducting device.

[0019] In summary, the present application uses a graphite sheet, which includes: a contact portion, laid on the side of the circuit board away from the laser; a first extension portion, extending from the contact portion along a first direction to contact the optical machine bracket; and a second extension portion, extending from the contact portion along a second direction to contact the thermally conductive bracket, which can fix the thermal connection and complete the heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without inventive efforts.

[0021] Figure 1 This is a decomposition diagram of the laser radar heat conduction device provided in an embodiment of the present application.

[0022] Figure 2 A partial exploded view of the laser radar heat conduction device provided in an embodiment of the present application.

[0023] Figure 3Schematic diagram of the stack of graphite sheets for the laser radar heat conduction device provided in an embodiment of the present application.

[0024] Figure 4 A schematic diagram of the structure of the laser radar provided in an embodiment of the present application.

[0025] The numbers in the figure are as follows:

[0026]

[0027]

[0028] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Specific embodiments

[0029] In the description of this application, it is necessary to understand that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship described in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 this application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0032] To provide a clearer and more accurate understanding of the contents of this application, the following detailed description will be made with reference to the accompanying drawings. The accompanying drawings illustrate examples of embodiments of this application, with like reference numerals representing like elements. It should be understood that the scales shown in the accompanying drawings are not those of the actual implementation of this application. These scales are for illustrative purposes only and are not drawn to scale.

[0033] Please see Figure 1 The laser radar heat conduction device 1 is used in the laser radar 2. The laser radar 2 includes a plurality of lasers 60, which are used to emit lasers. The laser radar 2 heat conduction device 1 is used to conduct the heat generated by the lasers 60 to the outside world, thereby dissipating the heat generated by the lasers 60. The laser radar heat conduction device 1 includes an optical mechanical bracket 10, a thermally conductive bracket 20, a plurality of circuit boards 30, a plurality of connecting pillars 40, and a graphite sheet 50. Each circuit board 30 is mounted with a plurality of lasers 60. The plurality of circuit boards 30 are arranged between the optical mechanical bracket 10 and the thermally conductive bracket 20. The connecting pillars 40 are connected between the optical mechanical bracket 10 and the thermally conductive bracket 20 and pass through the plurality of circuit boards 30 so that the plurality of circuit boards 30 are fixed between the optical mechanical bracket 10 and the thermally conductive bracket 20. The graphite sheet 50 contacts the circuit board 30 to conduct the heat generated by the lasers 60 to the circuit board 30, so that the circuit board 30 is kept within a preset temperature range.

[0034] The optical engine bracket 10 is in contact with the heat dissipation component 70 . The heat conductive bracket 20 is spaced apart from the optical engine bracket 10 and is in contact with the heat dissipation component 70 .

[0035] Please see Figure 1 and Figure 2 , several circuit boards 30 are arranged between the optical machine bracket 10 and the thermally conductive bracket 20 at intervals and in parallel. The connecting column 40 is arranged between the optical machine bracket 10 and the thermally conductive bracket 20. The circuit board 30 is provided with a plurality of through-holes 301 and a plurality of thermal conductive holes 302. The thermal conductive holes 302 pass through the side of the circuit board 30 where the laser 60 is provided to the side where the graphite sheet 50 is provided. The connecting column 40 passes through the through-hole 301 and its two ends are respectively fixed to the optical machine bracket 10 and the thermally conductive bracket 20. In this embodiment, the connecting column 40 is cylindrical, the through-hole 301 is circular, and the connecting column 40 is adapted to the through-hole 301. The connecting column 40 passes through the circuit board 30 and the graphite sheet 50 in sequence and contacts the thermally conductive bracket 20. The connecting column 40 and the through-hole can also be other regular or irregular patterns, which can be set according to actual conditions and are not limited here.

[0036] Each circuit board 30 is used to mount a plurality of lasers 60. A mounting area 303 for the lasers 60 is provided near the edge of each circuit board 30. In this embodiment, the lasers 60 are arranged linearly and spaced apart on one side of the circuit board 30 along the placement direction of the circuit board 30, with the lasers 60 facing away from the thermally conductive bracket 20. The above-described position and arrangement of the lasers 60 is merely an example and can be arranged according to actual circumstances and is not limited here.

[0037] Please see Figure 2 and Figure 3, the graphite sheet 50 includes a contact portion 501, a first extension portion 502, and a second extension portion 503. The contact portion 501 is laid on the side of the circuit board 30 away from the laser 60. The first extension portion 502 extends from the contact portion 501 along a first direction to contact the optical machine bracket 10. The second extension portion 503 extends from the contact portion 501 along a second direction to contact the thermal conductive bracket 20. The graphite sheet 50 is used to conduct heat in two directions, that is, it has a high thermal conductivity property of a plane, and only a very small space in the thickness direction is required to complete the heat transfer, and solve the thermal cascade problem caused by the close arrangement of multiple heat sources. Among them, the graphite sheet 50 is an integrally formed thin sheet, and the graphite sheet 50 is a flexible structure, which can greatly facilitate optical assembly and avoid problems such as insufficient contact of conventional thermal interface materials.

[0038] In this embodiment, the first direction is to extend along one end of the circuit board 30, and the second direction is to bend and extend along one side of the circuit board 30 toward the heat-conducting bracket 20. The graphite sheet 50 generates heat-conducting paths on the top and sides of the circuit board 30. The parallel design makes the system thermal resistance smaller, and can improve the temperature uniformity between each laser, reducing the cost of later calibration and algorithm compensation. In this embodiment, the graphite sheet 50 is an integrally formed thin sheet. The second extension portion 503 of the graphite sheet 50 corresponding to each circuit board 30 is stacked. The first extension portion 502 and the second extension portion 503 are provided with a backing adhesive 504 for fitting with the optical machine bracket 10 and the heat-conducting bracket 20. The above-mentioned backing adhesive 504 is used to fix the graphite sheet 50 to the optical machine bracket 10 and the heat-conducting bracket 20. According to actual conditions, other fixing tools can also be used to fix the three. This is not limited here.

[0039] Please see Figure 4 The laser radar 2 includes: a plurality of lasers 60 and a laser radar heat conducting device 1. The plurality of lasers 60 are mounted on the laser radar heat conducting device 1. The structure of the laser radar 2 heat conducting device 1 and the relationship between the plurality of lasers 60 and the laser radar heat conducting device 1 are described above and will not be repeated here.

[0040] Obviously, those skilled in the art may make various modifications and variations to this application without departing from the spirit and scope of this application. Thus, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application is intended to include such modifications and variations.

[0041] The above examples are merely preferred embodiments of the present application and are not intended to limit the scope of the present application. Therefore, equivalent changes made according to the claims of the present application are still within the scope of the present application.

Claims

1. A laser radar heat conduction device, characterized in that: The laser radar heat conduction device includes: an optical machine bracket, which is in contact with the heat dissipation component; a heat-conducting bracket, spaced apart from the optical machine bracket and in contact with the heat dissipation component; A plurality of circuit boards are arranged in parallel and at intervals between the optical machine bracket and the heat conductive bracket, each circuit board is used to set a plurality of lasers, and the plurality of lasers are arranged in a linear shape and at intervals on one side of the circuit board along the placement direction of the circuit board; and A graphite sheet, comprising: A contact portion is provided on a side of the circuit board facing away from the laser; A first extending portion extending from the contact portion along a first direction to contact the optical machine bracket; and The second extending portion extends from the contact portion along the second direction to contact the thermally conductive bracket.

2. The laser radar heat conducting device according to claim 1, wherein: The plurality of lasers are away from the heat conductive support.

3. The laser radar heat conducting device according to claim 2, wherein: The circuit board is provided with an installation area near the edge for installing the plurality of lasers.

4. The laser radar heat conducting device according to claim 1, wherein: The circuit board is provided with a heat conduction hole, and the heat conduction hole passes through from the side of the circuit board provided with the laser to the side of the circuit board provided with the graphite sheet.

5. The laser radar heat conducting device according to claim 1, wherein: The first direction extends along one end of the circuit board, and the second direction extends along one side of the circuit board and bends toward the heat-conducting bracket.

6. The laser radar heat conducting device according to claim 5, wherein: The second extension portions of the graphite sheets corresponding to the circuit boards are stacked.

7. The laser radar heat conducting device according to claim 1, wherein: The graphite sheet is an integrally formed sheet.

8. The laser radar heat conducting device according to claim 1, wherein: The laser radar heat conduction device also includes a plurality of connecting columns arranged between the optical machine bracket and the heat conduction bracket. The circuit board is also provided with a plurality of through holes. The connecting columns pass through the through holes and the two ends are respectively fixed to the optical machine bracket and the heat conduction bracket.

9. The laser radar heat conducting device according to claim 1, wherein: The first extension portion and the second extension portion are provided with adhesive backing for being attached to the optical machine bracket and the thermal conductive bracket.

10. A laser radar, characterized in that: The laser radar includes: several lasers; and The laser radar heat conducting device according to any one of claims 1 to 9.

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