Lidar and mobile device

Abstract

The embodiment of the application relates to the technical field of laser radar, and discloses a laser radar and a movable device. The laser radar comprises a shell and a functional plate, the shell is connected with the functional plate and is used for fixing the functional plate. The functional plate comprises: a light transmission area, which is provided with a laser emitter or a receiving chip and is used for emitting or receiving a laser beam; a heat dissipation area, which comprises a first heat dissipation area and a second heat dissipation area, and the first heat dissipation area and the second heat dissipation area are respectively provided with at least one heating element. The first heat dissipation area and the second heat dissipation area are arranged in a direction along a geometric symmetry axis of the functional plate, and the light transmission area is located between the first heat dissipation area and the second heat dissipation area; a blocking piece is arranged between the light transmission area and the first heat dissipation area and between the light transmission area and the second heat dissipation area. Through the arrangement of the blocking piece, in the case of vibration impact and the like, the risk of the heat conduction material and the debris falling into the light transmission hole and polluting the optical channel is reduced, the stray light introduced by the devices and the heat conduction material outside the light transmission hole is also reduced, and the detection precision of the laser radar is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of laser radar, in particular to a laser radar and a mobile device. BACKGROUND

[0002] With the development of laser radar technology, the power of the transmitting end and the receiving end is generally increased, resulting in an increase in the demand for heat dissipation. The main heat of the transmitting end is concentrated on the transmitting plate, and the main heat of the receiving end is concentrated on the receiving plate. The transmitting plate and the receiving plate are collectively referred to as a functional plate. At present, the commonly used single-side heat dissipation scheme of the functional plate cannot meet the demand, and therefore a double-side heat dissipation design of the functional plate is needed.

[0003] If the functional plate is subjected to double-side heat dissipation, the laser transmitting or receiving surface needs to be subjected to heat dissipation. However, when the laser radar is subjected to vibration or impact, the heat-conducting material of the laser transmitting or receiving surface may fall into the light transmission area, affecting the transmission and reception of the laser, and thus reducing the detection accuracy of the laser radar. In addition, the heat-conducting material and devices with low light absorption rate on the laser transmitting or receiving surface also have the risk of introducing stray light into the optical path, thus affecting the detection accuracy of the laser radar. SUMMARY

[0004] Embodiments of the present application provide a laser radar and a mobile device, aiming to solve the problem that the heat-conducting material for heat dissipation on the functional plate of the laser radar affects the detection accuracy of the laser radar.

[0005] In a first aspect, the present application provides a laser radar, comprising a shell and a functional plate; the shell is connected with the functional plate, and the shell is used to fix the functional plate; the functional plate comprises: a light transmission area, provided with a laser transmitter or a receiving chip, the light transmission area is used to transmit or receive a laser beam; a heat dissipation area, comprising a first heat dissipation area and a second heat dissipation area, the first heat dissipation area and the second heat dissipation area are respectively provided with at least one heating element, wherein the first heat dissipation area and the second heat dissipation area are arranged in a direction along a geometric symmetry axis of the functional plate, and the light transmission area is located between the first heat dissipation area and the second heat dissipation area; wherein a blocking piece is arranged between the light transmission area and the first heat dissipation area, and between the light transmission area and the second heat dissipation area. By arranging the blocking piece between the light transmission area and the heat dissipation area of the functional plate, the heat dissipation material and debris in the heat dissipation area are prevented from falling off under the condition of vibration and impact, and the laser transmitter or the receiving chip on the light transmission area is prevented from being damaged or blocked. In addition, the blocking piece isolates the optical path of the light transmission area from other areas, reduces the stray light introduced by devices outside the optical path, and thus improves the detection accuracy of the laser radar.

[0006] In some embodiments, the shell is provided with a light transmission hole, the light transmission hole is aligned with the light transmission area, and the light transmission hole is used to provide a transmission channel for the laser beam emitted or received by the light transmission area; wherein the first boss is arranged around the edge of the light transmission hole, and the side of the blocking piece away from the functional plate is in abutment with the first boss. By arranging the first boss around the edge of the light transmission hole, the accurate alignment of the light transmission hole and the light transmission area can be ensured, and it is guaranteed that the laser beam can pass through the light transmission hole accurately, thereby improving the detection performance of the laser radar. In addition, the first boss is also in abutment with the blocking piece, which not only provides stable support for the blocking piece, but also cooperates with the blocking piece to effectively isolate the optical channel of the laser radar from other parts, reduce the interference of stray light, and further improve the detection accuracy and reliability of the laser radar.

[0007] In some embodiments, the blocking piece is made of flexible or elastic material. By using a blocking piece made of flexible or elastic material, on the one hand, the functional plate or the device on the functional plate in direct contact with the blocking piece can be effectively protected from damage caused by vibration or impact; on the other hand, the blocking piece made of flexible or elastic material can seal the optical path of the laser radar, prevent external pollutants such as dust and moisture from entering the optical path, and thus ensure the optical performance and detection accuracy of the laser radar.

[0008] In some embodiments, the shell further comprises: a heat dissipation boss comprising a first heat dissipation boss and a second heat dissipation boss, wherein the first heat dissipation boss and the second heat dissipation boss are arranged on both sides of the first boss along the vertical direction of the geometric symmetry axis of the light transmission hole; the first heat dissipation boss and the first heat dissipation area have a first predetermined gap, and the first predetermined gap is filled with a heat-conducting material, wherein the side of the heat-conducting material filled in the first predetermined gap away from the first heat dissipation boss is in abutment with the heat-generating element of the first heat dissipation area; the second heat dissipation boss and the second heat dissipation area have a second predetermined gap, and the second predetermined gap is filled with a heat-conducting material, wherein the side of the heat-conducting material filled in the second predetermined gap away from the second heat dissipation boss is in abutment with the heat-generating element of the second heat dissipation area. By arranging the heat dissipation boss corresponding to the heat-generating element in the heat dissipation area, and filling the heat-conducting material in the gap between the heat-generating element and the heat dissipation boss, it is ensured that the heat on the functional plate can be quickly transferred from the heat-generating element to the heat dissipation boss, thereby improving the heat dissipation efficiency. In addition, the first heat dissipation boss and the second heat dissipation boss are arranged on both sides of the first boss along the vertical direction of the geometric symmetry axis of the light transmission hole, and this symmetrical design can ensure uniform heat distribution and avoid local overheating, thereby further improving the heat dissipation effect.

[0009] In some embodiments, the first protrusion has a height higher than the first and second heat dissipation protrusions; the first protrusion is used to block the heat-conducting material in the first and second preset gaps from the periphery of the light passage. By setting the height of the first protrusion to be higher than the heat dissipation protrusions, the heat-conducting material on the heat dissipation protrusions can be blocked from the periphery of the light passage, preventing the heat-conducting material from contaminating the optical channel. In addition, the height design of the first protrusion can ensure that the heat-conducting material can effectively fill in the preset gaps, thereby improving the heat dissipation efficiency.

[0010] In some embodiments, the shell further comprises: at least two second protrusions, each disposed on the first protrusion, wherein the at least two second protrusions are disposed on both sides of the light passage along the horizontal direction of the geometric symmetry axis of the light passage; and wherein the second protrusions abut the side of the functional board close to the shell, for supporting the functional board. By disposing the second protrusions on both sides of the first protrusion, the second protrusions abut the side of the functional board, for fixing and supporting the functional board, ensuring that the functional board remains stable, preventing the devices on the functional board from causing friction with other parts due to vibration, thereby causing short circuit and affecting the detection of the laser radar.

[0011] In some embodiments, the laser radar further comprises a heat dissipation plate fixedly connected with the functional board; the heat dissipation plate comprises: a third protrusion, the third protrusion having a third preset gap with the side of the functional board away from the shell, the third preset gap being filled with heat-conducting material, wherein the side of the heat-conducting material away from the third protrusion abuts the side of the functional board away from the shell; and at least two fourth protrusions, each disposed on the third protrusion, wherein the at least two fourth protrusions are disposed in the horizontal direction of the geometric symmetry axis of the third protrusion, the fourth protrusions abutting the side of the functional board away from the shell, for supporting the functional board. By fixing the heat dissipation plate with the functional board, on the one hand, the heat dissipation plate is used to tighten and fix the functional board, and on the other hand, the heat dissipation plate is used to increase the heat dissipation contact surface with the functional board, thereby increasing the heat dissipation area and improving the heat dissipation efficiency.

[0012] In some embodiments, the side wall of the heat dissipation plate is provided with a groove, the groove is provided with conductive glue, and the heat dissipation plate is fixedly bonded with the side of the functional board away from the shell through the conductive glue; wherein the conductive glue is used for electromagnetic shielding between the heat dissipation plate and the functional board. By providing a groove in the side wall of the heat dissipation plate and filling it with conductive glue, on the one hand, the connection between the heat dissipation plate and the functional board is enhanced through the bonding effect of the conductive glue, reducing the influence of vibration and impact on the functional board and improving the mechanical stability of the laser radar; on the other hand, the conductive glue can prevent external electromagnetic interference from entering the functional board, while also preventing electromagnetic signals on the functional board from leaking to the outside, thereby improving the stability and reliability of the laser radar.

[0013] In some embodiments, the functional board comprises one or more of the emission plate or the receiving plate; and the heat-conducting material comprises a heat-conducting pad or a heat-conducting gel.

[0014] In a second aspect, the embodiments of the present application provide a movable device, characterized in that the movable device comprises a mobile device and the laser radar described in any of the above embodiments, and the laser radar is carried on the mobile device.

[0015] The technical solutions provided by the present application have the following beneficial effects:

[0016] The present application discloses a laser radar and a movable device. The laser emitting or receiving surface of the functional board of the laser radar is provided with a blocking piece for isolating the light transmission area and the heat dissipation area. The other side of the blocking piece abuts against the boss around the light transmission hole on the shell, and the two together isolate the optical channel of the laser radar optical system and the heat source. This design not only reduces the risk of the falling of the heat-conducting materials and debris into the light transmission hole and the pollution of the optical channel under the conditions of vibration and impact, but also reduces the stray light interference caused by the devices and heat-conducting materials outside the light transmission hole, thereby improving the detection accuracy of the laser radar.

[0017] In addition, the laser emitting or receiving surface of the functional board conducts heat to the shell for heat dissipation through the heat-conducting material, and the opposite side of the functional board conducts heat to the heat dissipation plate for heat dissipation through the heat-conducting material. This double-sided heat dissipation design significantly improves the heat dissipation efficiency of the functional board, thereby ensuring the heat dissipation performance of the laser radar under high-power operation. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The exploded structural schematic diagram of the laser radar from one perspective provided by the embodiments of the present application is shown in the figure.

[0020] Figure 2 The exploded structural schematic diagram of the laser radar from another perspective provided by the embodiments of the present application is shown in the figure.

[0021] Figure 3 The front view of the shell provided by the embodiments of the present application is shown in the figure.

[0022] Figure 4 The rear view of the shell provided by the embodiments of the present application is shown in the figure.

[0023] Figure 5 The front view of the functional board provided by the embodiments of the present application is shown in the figure.

[0024] Figure 6The diagram shows a front view and a cross-sectional view of the lidar provided in the embodiments of this application.

[0025] Figure 7 A front view of the heat sink provided in an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of the structure of a mobile device provided in an embodiment of this application.

[0027] The attached figures are labeled as follows:

[0028] 1. LiDAR; 11. Housing; 110. Positioning post; 111. First receiving cavity; 112. Second receiving cavity; 113. Light transmission hole; 114. First boss; 115. Second boss; 116. First heat dissipation boss; 117. Second heat dissipation boss; 118. Thermally conductive material; 1111. First opening; 1121. Second opening; 12. Functional board; 120. Mounting hole; 121. Light transmission area; 122. First heat dissipation area; 123. Second heat dissipation area; 124. Heating element; 125. Barrier component; 126. Capacitor energy storage element; 13. Heat sink; 131. Third boss; 132. Fourth boss; 133. Groove; 134. Conductive adhesive; 2. Moving device; 3. Mobile device. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described clearly and in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.

[0030] When dissipating heat from the laser emitting or receiving surfaces of the functional boards in a lidar system, the thermally conductive material from these surfaces may fall into the light-transmitting area when the lidar is subjected to vibration or impact. This can affect the emission and reception of laser light, thereby reducing the lidar's detection accuracy and reliability. Furthermore, thermally conductive materials and components with low light absorption on the functional boards also pose a risk of introducing stray light into the optical path, further impacting the lidar's detection accuracy and reliability.

[0031] Based on this, embodiments of this application provide a lidar and a mobile device, aiming to solve the problem that the thermally conductive material used for heat dissipation on the lidar functional board affects the detection accuracy of the lidar. The embodiments in this application are all described using lidar applied to vehicle-mounted equipment; however, in other embodiments of this application, the lidar 1 can also be applied to other products, such as robots, drones, etc.

[0032] like Figure 1 andFigure 2 As shown, Figure 1 This is a schematic diagram of a three-dimensional explosion structure from a single viewpoint provided in an embodiment of this application using a lidar. Figure 2 This is a three-dimensional exploded view of the lidar provided in an embodiment of this application. The lidar 1 includes a housing 11, a functional board 12, and a heat sink 13. The functional board 12 is disposed between the housing 11 and the heat sink 13, and the housing 11 is fixedly connected to the functional board 12, with the housing 11 used to fix the functional board 12.

[0033] In one embodiment, such as Figure 2 As shown, the housing 11 has a positioning post 110 on the side facing the functional plate 12, and the functional plate 12 has a first mounting hole 120 corresponding to the positioning post 110. The functional plate 12 is mounted on the positioning post 110 of the housing 11 through the first mounting hole 120. The positioning post 110 and the first mounting hole 120 can be an interference fit or a clearance fit. If the positioning post 110 and the first mounting hole 120 are a clearance fit, an adhesive layer can be provided in the gap between the positioning post 110 and the first mounting hole 120 to fix the relative position between the functional plate 12 and the housing 11.

[0034] like Figure 3 and Figure 4 As shown, Figure 3 A front view of the housing provided in an embodiment of this application. Figure 4 This is a rear view of the housing provided in an embodiment of this application. The housing 11 includes a first receiving cavity 111 and a second receiving cavity 112. The first receiving cavity 111 has a first opening 1111 on the side facing the second receiving cavity 112, and the second receiving cavity 112 has a second opening 1121 on the side facing the first receiving cavity 111. The first opening 111 and the second opening 1121 together define a light-transmitting hole 113. The light-transmitting hole 113 is used to connect the first receiving cavity 111 and the second receiving cavity 112. The first receiving cavity 111 in the housing 11 is used to receive an optical lens, and the second receiving cavity 112 is a partitioned receiving cavity.

[0035] In some embodiments, the second receiving cavity 112 is provided with a first boss 114, at least two second bosses 115, and a heat dissipation boss. The first boss 114 is disposed around the edge of the light-transmitting hole 113, wherein the first boss 114 extends from both ends of the horizontal direction along the geometric symmetry axis of the light-transmitting hole 113 away from the light-transmitting hole 113, and abuts against the sidewall of the housing 11. The first boss 114 divides the second receiving cavity 112 into two regions, forming a partitioned receiving cavity. At least two second bosses 115 are disposed on the first boss 114, wherein the at least two second bosses 115 are disposed on both sides of the light-transmitting hole 113 along the horizontal direction of the geometric symmetry axis of the light-transmitting hole 113. The heat dissipation boss includes a first heat dissipation boss 116 and a second heat dissipation boss 117, wherein the first heat dissipation boss 116 and the second heat dissipation boss 117 are disposed on both sides of the first boss 114 along the vertical direction of the geometric symmetry axis of the light-transmitting hole 113.

[0036] like Figure 5 As shown, Figure 5 This is a front view of a functional board provided in an embodiment of this application. The functional board 12 includes a light-transmitting area 121 and a heat dissipation area. The light-transmitting area 121 is provided with a laser emitter or receiver chip for emitting or receiving laser beams. The heat dissipation area includes a first heat dissipation area 122 and a second heat dissipation area 123. The first heat dissipation area 122 and the second heat dissipation area 123 are each provided with at least one heat-generating element 124. The first heat dissipation area 122 and the second heat dissipation area 123 are spaced apart along the geometric symmetry axis of the functional board 12, and the light-transmitting area 121 is located between the first heat dissipation area 122 and the second heat dissipation area 123. A barrier 125 is provided between the light-transmitting area 121 and the first heat dissipation area 122 and the second heat dissipation area 123. By providing a barrier 125 between the light-transmitting area 121 and the heat dissipation area of ​​the functional board 12, the heat dissipation material, debris, etc., in the heat dissipation area are effectively prevented from falling off under conditions such as vibration and impact, thus avoiding damage or obstruction of the laser emitter or receiver chip on the light-transmitting area 121. In addition, the blocking element 125 isolates the optical path of the light-transmitting area 121 from other areas, reducing stray light introduced by devices outside the optical path, thereby improving the detection accuracy of the lidar 1.

[0037] In some embodiments, the functional board 12 includes one or more of a transmitting board or a receiving board, and the heating element 124 includes a driving module in the transmitting board and a signal processing module in the receiving board. When the functional board 12 is a laser transmitting board, capacitor energy storage elements 126 are provided between the light-transmitting area 121 and the first heat dissipation area 122, and between the light-transmitting area 121 and the third heat dissipation area 123, and the capacitor energy storage elements 126 are arranged in a linear array. The capacitor energy storage elements 126 are used not only to rapidly release a large amount of energy in a short time to meet the high-power pulse current requirement during laser emission, but also to smooth fluctuations in the power supply voltage, providing stable energy support for laser emission, thereby improving the stability and reliability of laser emission.

[0038] In some embodiments, when the functional board 12 is a laser emitting board, the barrier 125 can be disposed on the capacitor energy storage element 126. The barrier 125 is made of a flexible or elastic material. Specifically, the barrier 125 can be made of materials such as adhesive, silicone sealing rings, or thermoplastic elastomers. When the lidar 1 is subjected to vibration or impact, the barrier 125, made of flexible or elastic material, can effectively protect the functional board 12 and the capacitor energy storage element 126 on the functional board 12 that are in direct contact with the barrier 154, preventing damage caused by vibration or impact.

[0039] In some embodiments, the lidar 1 is one of a mechanical lidar, an optical phased array (OPA) solid-state lidar, a microelectromechanical system (MEMS) solid-state lidar, or a flash solid-state lidar. When the functional board 12 is a laser emitting board, the laser emitters on the functional board 12 are arranged in a planar array or at least one linear array, and each emitting array includes a laser diode, an edge-emitting laser (EEL), or a vertical-cavity surface-emitting laser (VCSEL). When the functional board 12 is a receiving board, the receiving chip includes multiple receiving units, which are avalanche photodiodes (APDs), single-photon avalanche diodes (SPADs), or silicon photomultipliers (SiPMs).

[0040] like Figure 6 As shown, Figure 6This is a front view and a cross-sectional structural diagram of the lidar. The housing 11 has a light-transmitting hole 113 aligned with a light-transmitting area 121. The light-transmitting hole 113 provides a transmission channel for the laser beam emitted or received by the light-transmitting area 121. A first protrusion 114 is provided on the side of the light-transmitting hole 113 closest to the light-transmitting area 121. The first protrusion 114 surrounds the edge of the light-transmitting hole 113, and the blocking member 125 abuts against the first protrusion 114 on the side away from the functional plate 12. By providing the first protrusion 114 around the edge of the light-transmitting hole 113, precise alignment between the light-transmitting hole 113 and the light-transmitting area 121 can be ensured, guaranteeing that the laser beam can accurately pass through the light-transmitting hole 113, thereby improving the detection performance of the lidar 1.

[0041] The first protrusion 114 abuts against the barrier 125, providing stable support for the barrier 125 and working in tandem with it to effectively isolate the optical path of the lidar 1 from other parts. This not only achieves optical and thermal isolation of the optomechanical system in the lidar 1 but also reduces stray light interference, further improving the detection accuracy and reliability of the lidar 1. Furthermore, the barrier 125, made of flexible or elastic materials, can also seal the optical path of the lidar 1, preventing external contaminants such as dust and moisture from entering the optical path, thereby ensuring the optical performance and detection accuracy of the lidar 1.

[0042] In some embodiments, a first preset gap exists between the first heat dissipation protrusion 116 and the first heat dissipation area 122, and the first preset gap is filled with a thermally conductive material 118. The side of the thermally conductive material 118 filling the first preset gap away from the first heat dissipation protrusion 116 abuts against the heating element 124 of the first heat dissipation area 122. Similarly, a second preset gap exists between the second heat dissipation protrusion 117 and the second heat dissipation area 123, and the second preset gap is filled with a thermally conductive material 118. The side of the thermally conductive material 118 filling the second preset gap away from the second heat dissipation protrusion 117 abuts against the heating element 124 of the second heat dissipation area 123. In some embodiments, the thermally conductive material 118 includes a thermally conductive pad or a thermally conductive gel.

[0043] In one embodiment, the first heat dissipation protrusion 116 corresponds one-to-one with the heating element 124 of the first heat dissipation area 122, and the second heat dissipation protrusion 117 corresponds one-to-one with the heating element 124 of the second heat dissipation area 123. By setting heat dissipation protrusions corresponding to the heating elements 124 in the heat dissipation area, and filling the gap between the heating element 124 and the heat dissipation protrusion with thermally conductive material 118, it is ensured that the heat on the functional board 12 can be quickly transferred from the heating element 124 to the heat dissipation protrusion, thereby improving the heat dissipation efficiency. In addition, the first heat dissipation protrusion 116 and the second heat dissipation protrusion 117 are vertically arranged on both sides of the first protrusion 114 along the geometric symmetry axis of the light-transmitting hole. This symmetrical design can ensure uniform heat distribution, avoid local overheating, and further improve the heat dissipation effect.

[0044] In some embodiments, the height of the first protrusion 114 is higher than that of the first heat dissipation protrusion 116 and the second heat dissipation protrusion 117. The first protrusion 114 is used to block the thermally conductive material 118 within the first and second preset gaps from the periphery of the light-transmitting hole 113. By setting the height of the first protrusion 114 to be higher than that of the heat dissipation protrusion, the thermally conductive material 118 on the heat dissipation protrusion can be blocked from the periphery of the light-transmitting hole 113, preventing the thermally conductive material 118 from contaminating the optical channel. In addition, the height design of the first protrusion 114 can ensure that the thermally conductive material 118 can be effectively filled within the preset gap, thereby improving heat dissipation efficiency.

[0045] In one embodiment, when the housing 11 is pressed and fixed to the functional plate 12, the height of the first boss 114 is higher than that of the first heat dissipation boss 116 and the second heat dissipation boss 117, so that the thermal conductive gel on the first heat dissipation boss 116 and the second heat dissipation boss 117 will not affect the light-transmitting hole 113 after it is spread out, thus achieving a better photothermal isolation effect. At the same time, it makes the photothermal boundary clearer and facilitates operations such as dispensing on the production line.

[0046] In some embodiments, the second boss 115 abuts against the side of the functional plate 12 near the housing 11, and is used to support the functional plate 12. By providing the second boss 115 on both sides of the first boss 114, and the second boss 115 abutting against one side of the functional plate 12, the functional plate 12 is fixed and supported, ensuring that the functional plate 12 remains stable and preventing the devices on the functional plate 12 from rubbing against other parts due to vibration, thereby causing a short circuit and affecting the detection of the lidar 1.

[0047] like Figure 7 As shown, Figure 7This is a front view of the heat sink provided in an embodiment of this application. The heat sink 13 is fixedly connected to the functional plate 12. The heat sink 13 includes a third protrusion 131 and at least two fourth protrusions 132. The third protrusion 131 has a third preset gap with the side of the functional plate 12 away from the housing 11. The third preset gap is filled with a thermally conductive material 118, wherein the side of the thermally conductive material 118 filling the third preset gap away from the third protrusion 131 abuts against the side of the functional plate 12 away from the housing 11. At least two fourth protrusions 132 are all provided on the third protrusion 131, wherein the at least two fourth protrusions 132 are spaced apart in the horizontal direction along the geometric symmetry axis of the third protrusion 131, and the fourth protrusions 132 abut against the side of the functional plate 12 away from the housing 11, for supporting the functional plate 12. By setting the heat sink 13 to be fixedly connected to the functional plate 12, on the one hand, the heat sink 13 is used to tighten and fix the functional plate 12, and on the other hand, the heat sink 13 is used to increase the heat dissipation contact surface with the functional plate 12, increase the heat dissipation area, and thus improve the heat dissipation efficiency.

[0048] In one embodiment, the third protrusion 131 on the heat sink 13 corresponds to the light-transmitting area 121 on the functional board 12. When the functional board 12 is a laser emitting board, a laser emitter is provided on the light-transmitting area 121; when the functional board 12 is a receiving board, a receiving chip is provided on the light-transmitting area 121. Through the above arrangement, the heat generated by the laser emitter and the receiving chip during operation can be transferred to the third protrusion 131 of the heat sink 13 through the thermally conductive material 118 filled in the third preset gap, thereby improving the heat dissipation efficiency of the functional board 12.

[0049] In some embodiments, the sidewall of the heat sink 13 is provided with a groove 133, and conductive adhesive 134 is provided in the groove 133. The heat sink 13 is bonded and fixed to the side of the functional plate 12 away from the housing 11 by the conductive adhesive 134. The conductive adhesive 134 is used to provide electromagnetic shielding between the heat sink 13 and the functional plate 12. By providing a groove 133 and filling it with conductive adhesive 134 on the sidewall of the heat sink 13, on the one hand, the bonding effect of the conductive adhesive 134 enhances the connection between the heat sink 13 and the functional plate 12, reduces the impact of vibration and shock on the functional plate 12, and improves the mechanical stability of the lidar 1; on the other hand, the conductive adhesive 134 can prevent external electromagnetic interference from entering the functional plate 12, and also prevent electromagnetic signals on the functional plate 12 from leaking to the outside, thereby improving the stability and reliability of the lidar 1.

[0050] Secondly, embodiments of this application provide a mobile device. For example... Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of a mobile device provided in an embodiment of this application. The mobile device 3 includes a mobile device 2 and a lidar 1 as described in any of the above embodiments, wherein the lidar 1 is mounted on the mobile device 2.

[0051] In some embodiments, the mobile device 2 may be a car, a drone, a robot, etc., without specific limitations. The lidar 1 may be installed on the top of the mobile device 2, on the side of the mobile device 2, or inside the mobile device 2, without specific limitations.

[0052] In the embodiments provided in this application, the functional board 12 achieves double-sided heat dissipation through a thermally conductive material 118. On the side of the functional board 12 where the laser emitter or receiver chip is located, the thermally conductive material 118 transfers the heat from the heat-generating element 124 to the heat dissipation protrusion on the housing 11 for heat dissipation. On the side opposite to where the laser emitter or receiver chip is located, the thermally conductive material 118 transfers the heat to the third protrusion 131 on the heat sink 13 for heat dissipation. This arrangement improves the heat dissipation efficiency of the functional board 12, ensuring the heat dissipation performance of the lidar 1 during high-power operation.

[0053] Furthermore, the laser emitting or receiving surface of the functional board 12 of the lidar 1 is provided with a barrier 125 to isolate the light-transmitting area 121 and the heat dissipation area. The other side of the barrier 125 abuts against the first protrusion 114 around the light-transmitting hole 113 on the housing 11, and together they isolate the optical channel of the lidar 1's optomechanical system from the heat source. This design not only reduces the risk of heat-conducting material 118 and debris falling into the light-transmitting hole 113 and contaminating the optical channel under conditions such as vibration and impact, but also reduces stray light interference from devices and heat-conducting material 118 outside the light-transmitting hole 113, thereby improving the detection accuracy of the lidar 1.

[0054] In the description of this application, it should be understood that, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “and / or” and “and / or” as used herein describe the relationship between related objects, indicating that three relationships may exist, for example, A and / or B can represent: A alone, A and B simultaneously, and B alone. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship. The singular forms “a” and “an” are also intended to include the 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 stated 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., including any and all combinations of one or more of the associated listed items. Ordinal numbers such as “first” and “second” referenced in the embodiments of this application are merely identifiers and do not imply any particular order or relative importance.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances. The phrase "one or more embodiments" as used herein does not refer to the same embodiment, but rather to any suitable combination of specific features, structures, or characteristics. The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A lidar, characterized in that, The lidar includes a housing and a functional board; The housing is connected to the functional board, and the housing is used to fix the functional board. The functional board includes: The light-transmitting area is equipped with a laser emitter or receiver chip, and the light-transmitting area is used to emit or receive laser beams; The heat dissipation area includes a first heat dissipation area and a second heat dissipation area, each of which is provided with at least one heat-generating element. The first heat dissipation area and the second heat dissipation area are spaced apart along the geometric symmetry axis of the functional board, and the light transmission area is located between the first heat dissipation area and the second heat dissipation area. A barrier is provided between the light-transmitting area and the first heat-dissipating area, and between the light-transmitting area and the second heat-dissipating area.

2. The lidar according to claim 1, characterized in that, The housing is provided with a light-transmitting hole, which is aligned with the light-transmitting area. The light-transmitting hole is used to provide a transmission channel for the laser beam emitted or received by the light-transmitting area. The light-transmitting hole has a first protrusion on the side near the light-transmitting area. The first protrusion is arranged around the edge of the light-transmitting hole, and the side of the barrier away from the functional plate abuts against the first protrusion.

3. The lidar according to claim 2, characterized in that, The barrier is made of flexible or elastic material.

4. The lidar according to claim 2, characterized in that, The housing also includes: The heat dissipation protrusion includes a first heat dissipation protrusion and a second heat dissipation protrusion, wherein the first heat dissipation protrusion and the second heat dissipation protrusion are respectively disposed on both sides of the first protrusion along the vertical direction of the geometric symmetry axis of the light-transmitting hole. There is a first preset gap between the first heat dissipation protrusion and the first heat dissipation area. The first preset gap is filled with thermally conductive material. The side of the thermally conductive material filled in the first preset gap away from the first heat dissipation protrusion abuts against the heat-generating element of the first heat dissipation area. There is a second preset gap between the second heat dissipation protrusion and the second heat dissipation area. The second preset gap is filled with thermally conductive material. The side of the thermally conductive material filled in the second preset gap away from the second heat dissipation protrusion abuts against the heat-generating element of the second heat dissipation area.

5. The lidar according to claim 4, characterized in that, The height of the first boss is higher than that of the first heat dissipation boss and the second heat dissipation boss; The first protrusion is used to block the thermally conductive material within the first preset gap and the second preset gap from the periphery of the light-transmitting hole.

6. The lidar according to claim 4, characterized in that, The housing also includes: At least two second protrusions are provided on the first protrusion, wherein the at least two second protrusions are respectively provided on both sides of the light-transmitting hole along the horizontal direction of the geometric symmetry axis of the light-transmitting hole; The second boss abuts against the side of the functional plate near the housing, and is used to support the functional plate.

7. The lidar according to claim 2, characterized in that, The lidar also includes a heat sink, which is fixedly connected to the functional board. The heat sink includes: The third protrusion has a third preset gap with the side of the functional plate away from the housing. The third preset gap is filled with a thermally conductive material. The side of the thermally conductive material in the third preset gap away from the third protrusion abuts against the side of the functional plate away from the housing. At least two fourth protrusions are provided on the third protrusion, wherein the at least two fourth protrusions are spaced apart in the horizontal direction along the geometric symmetry axis of the third protrusion, and the fourth protrusions abut against the side of the functional plate away from the housing, for supporting the functional plate.

8. The lidar according to claim 7, characterized in that, The heat sink has a groove on its side wall, and conductive adhesive is provided in the groove. The heat sink is bonded and fixed to the side of the functional board away from the housing by the conductive adhesive. The conductive adhesive is used for electromagnetic shielding between the heat sink and the functional board.

9. The lidar according to claims 1-8, characterized in that, The functional board includes one or more of a transmitter board or a receiver board; The thermally conductive material includes a thermally conductive pad or a thermally conductive gel.

10. A mobile device, characterized in that, include: Mobile devices; as well as The lidar according to any one of claims 1-9, wherein the lidar is mounted on the mobile device.

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