Laser radar transmitting module and laser radar

Abstract

The present application discloses a laser radar transmitting module and a laser radar, and relates to the field of laser radar technology. The laser radar transmitting module includes a housing having a housing chamber and a laser transmitting assembly arranged in the housing chamber, a light outlet connected to the housing chamber is provided on one side of the housing, a positioning platform is provided on the housing, a fast axis cylindrical mirror is provided on the positioning platform, and a light beam emitted by the laser transmitting assembly passes through the light outlet and is collimated by the fast axis cylindrical mirror. It can improve the convenience of adjusting optical elements to improve the assembly accuracy of the laser transmitting assembly.

Description

Technical Field

[0001] The present application relates to the field of laser radar technology, and in particular to a laser radar transmitting module and a laser radar. Background Art

[0002] LiDAR is a system that detects and locates target information by emitting laser beams. Its working principle is to emit a detection signal (laser beam) to the target, and then compare the received signal reflected from the target with the emitted signal. After appropriate processing, the relevant information of the target can be obtained.

[0003] In the transceiver module of the laser radar, the position of the laser in the transmitting assembly is crucial to the divergence angle and pointing angle of the emitted laser. Generally, the laser PCB is directly installed in the transmitting assembly by mechanical positioning. The laser position accuracy is mainly determined by the PCB board making and patch accuracy. However, compared with the mechanical processing accuracy, the PCB board making and patch accuracy are lower, which will make the position of the laser relative to the reference plane of the transmitting assembly uncertain. When assembling the transmitting assembly and the optical element, a large adjustment amount is required to absorb the position error of the laser. The existing technology generally fixes the optical element assembly on the side wall of the shell, which makes it impossible to adjust the position of the optical element. Utility Model Content

[0004] The purpose of the present application is to provide a laser radar transmitting module and a laser radar, which can improve the convenience of adjusting optical elements to improve the assembly accuracy of the laser transmitting component.

[0005] The embodiment of the present application is implemented as follows:

[0006] According to one aspect of an embodiment of the present application, a laser radar transmitting module is provided, including a shell having a accommodating chamber and a laser emitting assembly arranged in the accommodating chamber, a light outlet connected to the accommodating chamber is opened on one side of the shell, a positioning platform is arranged on the shell, a fast-axis cylindrical mirror is arranged on the positioning platform, and a light beam emitted by the laser emitting assembly passes through the light outlet and is collimated by the fast-axis cylindrical mirror.

[0007] Optionally, as an implementable manner, the positioning platform has a mounting surface, the mounting surface is flush with the bottom of the light outlet, and the fast-axis cylindrical mirror is arranged on the mounting surface.

[0008] Optionally, as an implementable manner, the fast axis cylindrical mirror and the mounting surface are bonded by UV curing adhesive.

[0009] Optionally, as an implementable manner, the laser emitting assembly includes a mainboard and a laser disposed on the mainboard, the mainboard is connected to the housing, and the light beam emitted by the laser passes through the light outlet and is collimated by the fast axis cylindrical mirror.

[0010] Optionally, as an implementable manner, a heat-conducting material is filled between the mainboard and the shell.

[0011] Optionally, as an implementable manner, a heat conductive material filling groove is provided in the shell, and the heat conductive material is laid in the heat conductive material filling groove.

[0012] Optionally, as an implementable manner, a glue overflow groove is provided on the periphery of the thermally conductive material filling groove, and the thermally conductive material filling groove is communicated with the glue overflow groove.

[0013] Optionally, as an implementable manner, the shell includes a main shell and a side cover that are clamped together, a side surface of the main shell adjacent to the light outlet is provided with an opening, and the side cover is covered on the opening.

[0014] Optionally, as an implementable manner, the main shell is provided with a latching protrusion, and the side cover is provided with a latching slot latched with the latching protrusion, and the side cover and the main shell are connected by latching the latching protrusion with the latching slot.

[0015] Another aspect of an embodiment of the present application provides a laser radar, comprising a carrier frame, a laser radar receiving module and a laser radar transmitting module as described in any one of the above items, wherein the laser radar transmitting module and the laser radar receiving module are arranged on the carrier frame.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] The laser radar transmitting module and laser radar provided in the present application include a shell with a accommodating chamber and a laser emitting assembly arranged in the accommodating chamber. A light outlet connected to the accommodating chamber is opened on one side of the shell. A positioning platform is arranged on the shell, and a fast-axis cylindrical mirror is arranged on the positioning platform. The light beam emitted by the laser emitting assembly passes through the light outlet and is collimated by the fast-axis cylindrical mirror. The present application can ensure that the adjustment space of the fast-axis cylindrical mirror can ensure the assembly accuracy of the laser radar transmitting module by adjusting the installation position of the fast-axis cylindrical mirror on the positioning platform, thereby improving the convenience of adjusting the optical element to improve the assembly accuracy of the laser emitting assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 One of the structural schematic diagrams of the laser radar transmitting module in the laser radar provided in the embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a laser radar provided in an embodiment of the present application;

[0021] Figure 3 The second structural diagram of the laser radar transmitting module in the laser radar provided in the embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of the main shell of the laser radar transmitting module in the laser radar provided in an embodiment of the present application.

[0023] Icons: 100-laser radar; 110-laser radar transmitting module; 111-housing; 1111-light outlet; 1112-heat conductive material filling slot; 1113-glue overflow slot; 1114-main shell; 1114a-card bulge; 1115-side cover; 1115a-card slot; 112-laser transmitting assembly; 1121-main board; 1122-laser; 113-positioning platform; 1131-mounting surface; 114-fast axis cylindrical mirror; 120-carrier frame; 130-laser radar receiving module. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] Please refer to Figure 1 , Figure 2 and Figure 3 The present embodiment provides a laser radar transmitting module 110, including a shell 111 having a containing chamber and a laser emitting assembly 112 arranged in the containing chamber, a light outlet 1111 connected to the containing chamber is opened on one side of the shell 111, a positioning platform 113 is arranged on the shell 111, and a fast-axis cylindrical mirror 114 is arranged on the positioning platform 113, and a light beam emitted by the laser emitting assembly 112 passes through the light outlet 1111 and is collimated by the fast-axis cylindrical mirror 114.

[0029] Specifically, when assembling the laser radar transmitting module 110 provided in the present application, first place the laser transmitting assembly 112 in the containing chamber, adjust the position of the laser transmitting assembly 112 so that the light beam emitted by the laser transmitting assembly 112 can pass through the light outlet 1111, then install the fast axis cylindrical mirror 114 on the positioning platform 113, adjust the position of the fast axis cylindrical mirror 114 on the positioning platform 113 through the AA process, and fix the fast axis cylindrical mirror 114 on the positioning platform 113 after determining the position. AA (Active Alignment) mainly refers to a technology for determining the relative position of parts and components during assembly. When assembling each part and component of the laser radar transmitting module 110, the AA device will detect the semi-finished product to be assembled, and actively align it according to the actual situation of the semi-finished product to be assembled, and then assemble the next part and component in place.

[0030] It should be noted that the positioning platform 113 can be disposed in the accommodating chamber, or extended outside the shell 111 , which is not limited here, and it is only necessary to ensure the assembly accuracy of the laser emitting component 112 and the fast axis cylindrical mirror 114 .

[0031] The laser radar transmitting module 110 provided in the present application includes a shell 111 with a accommodating chamber and a laser emitting assembly 112 arranged in the accommodating chamber. A light outlet 1111 connected to the accommodating chamber is opened on one side of the shell 111, a positioning platform 113 is arranged on the shell 111, and a fast-axis cylindrical mirror 114 is arranged on the positioning platform 113. The light beam emitted by the laser emitting assembly 112 passes through the light outlet 1111 and is collimated by the fast-axis cylindrical mirror 114. The present application can ensure that the adjustment space of the fast-axis cylindrical mirror 114 can ensure the assembly accuracy of the laser radar transmitting module 110 by adjusting the installation position of the fast-axis cylindrical mirror 114 on the positioning platform 113, thereby improving the convenience of adjusting the optical elements to improve the assembly accuracy of the laser emitting assembly 112.

[0032] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, the positioning platform 113 has a mounting surface 1131 , the mounting surface 1131 is flush with the bottom of the light outlet 1111 , and the fast-axis cylindrical mirror 114 is disposed on the mounting surface 1131 .

[0033] Specifically, the position of the fast-axis cylindrical mirror 114 is adjusted on the mounting surface 1131 of the positioning platform 113 to ensure that there is sufficient adjustment space for the fast-axis cylindrical mirror 114. When assembling the laser radar transmitting module 110 provided in the present application, the laser transmitting assembly 112 is first placed in the accommodating chamber, and the position of the laser transmitting assembly 112 is adjusted so that the light beam emitted by the laser transmitting assembly 112 can pass through the light outlet 1111. Subsequently, the fast-axis cylindrical mirror 114 is installed on the mounting surface 1131 of the positioning platform 113, and the position of the fast-axis cylindrical mirror 114 on the mounting surface 1131 of the positioning platform 113 is adjusted through the AA process. After the position is determined, the fast-axis cylindrical mirror 114 is fixed on the mounting surface 1131 of the positioning platform 113.

[0034] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, the fast axis cylindrical mirror 114 and the mounting surface 1131 are bonded by UV curing adhesive.

[0035] Specifically, UV curing glue (Ultravi ol et Rays) is also called shadowless glue, photosensitive glue, and ultraviolet light curing glue. Shadowless glue is a type of adhesive that must be cured by ultraviolet light. It can be used as an adhesive, and can also be used as a glue for paints, coatings, inks, etc. UV is the abbreviation of Ultravi ol et Rays in English, that is, ultraviolet light. Ultraviolet light (UV) is invisible to the naked eye. It is a section of electromagnetic radiation outside of visible light, with a wavelength in the range of 10 to 400nm. The curing principle of shadowless glue is that the photoinitiator (or photosensitizer) in the UV curing material absorbs ultraviolet light under ultraviolet light to produce active free radicals or cations, which triggers monomer polymerization and cross-linking chemical reactions, so that the adhesive is converted from liquid to solid within a few seconds. In the present application, the fast-axis cylindrical mirror 114 and the mounting surface 1131 are bonded by UV curing glue to ensure that the fast-axis cylindrical mirror 114 can be stably fixed.

[0036] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, the laser emitting assembly 112 includes a main board 1121 and a laser 1122 disposed on the main board 1121 . The main board 1121 is connected to the housing 111 . The light beam emitted by the laser 1122 passes through the light outlet 1111 and is collimated by the fast axis cylindrical mirror 114 .

[0037] When assembling the laser radar transmitting module 110 provided in the present application, the laser transmitting assembly 112 is first placed in the accommodating chamber, that is, the mainboard 1121 and the housing 111 are connected, and the laser 1122 is set on the side of the mainboard 1121 away from the housing 111, and the positions of the mainboard 1121 and the laser 1122 are adjusted so that the light beam emitted by the laser 1122 can pass through the light outlet 1111, and then the fast axis cylindrical mirror 114 is installed on the mounting surface 1131 of the positioning platform 113, and the position of the fast axis cylindrical mirror 114 on the mounting surface 1131 of the positioning platform 113 is adjusted by the AA process, and the fast axis cylindrical mirror 114 is fixed on the mounting surface 1131 of the positioning platform 113 after the position is determined. It should be noted that after adjusting the installation position of the mainboard 1121 and the laser 1122, the mainboard 1121 can be installed in the housing 111 through a threaded fastening connector, or the mainboard 1121 and the housing 111 can be welded.

[0038] In a feasible embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, heat conductive material is filled between the mainboard 1121 and the housing 111 .

[0039] Specifically, a heat-conducting material is filled between the mainboard 1121 and the shell 111 to ensure that the heat generated by the mainboard 1121 can be quickly transferred to the shell 111 to ensure the heat conduction efficiency of the laser radar transmitting module 110. When assembling the laser radar transmitting module 110 provided in the present application, the laser transmitting assembly 112 is first placed in the accommodating chamber, that is, the heat-conducting material is first laid in the shell 111, and then the mainboard 1121 and the shell 111 are connected. A laser 1122 is arranged on one side of the main board 1121, and the positions of the main board 1121 and the laser 1122 are adjusted so that the light beam emitted by the laser 1122 can pass through the light outlet 1111, and then a fast axis cylindrical mirror 114 is installed on the mounting surface 1131 of the positioning platform 113, and the position of the fast axis cylindrical mirror 114 on the mounting surface 1131 of the positioning platform 113 is adjusted by the AA process, and after the position is determined, the fast axis cylindrical mirror 114 is fixed on the mounting surface 1131 of the positioning platform 113. It should be noted that the thermal conductive material can be a thermal conductive glue or a thermal conductive metal with good thermal conductivity.

[0040] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a heat conductive material filling groove 1112 is provided in the shell 111 , and the heat conductive material is laid in the heat conductive material filling groove 1112 .

[0041] Specifically, when the heat-conducting material is a heat-conducting adhesive, the heat-conducting adhesive is laid in the heat-conducting material filling groove 1112 to prevent the heat-conducting adhesive from flowing to other positions of the shell 111 and affecting the installation of other components. When assembling the laser radar transmitting module 110 provided in the present application, the laser transmitting component 112 is first placed in the accommodating chamber, that is, the heat-conducting material is first laid in the heat-conducting material filling groove 1112 in the shell 111, and then the main board 1121 and the shell 111 are connected. A laser 1122 is set on one side of the shell 111, and the positions of the main board 1121 and the laser 1122 are adjusted so that the light beam emitted by the laser 1122 can pass through the light outlet 1111, and then the fast axis cylindrical mirror 114 is installed on the mounting surface 1131 of the positioning platform 113, and the position of the fast axis cylindrical mirror 114 on the mounting surface 1131 of the positioning platform 113 is adjusted through the AA process, and after the position is determined, the fast axis cylindrical mirror 114 is fixed on the mounting surface 1131 of the positioning platform 113.

[0042] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a glue overflow groove 1113 is provided on the periphery of the thermal conductive material filling groove 1112 , and the thermal conductive material filling groove 1112 is connected to the glue overflow groove 1113 .

[0043] Specifically, a glue overflow groove 1113 is arranged on the periphery of the thermal conductive material filling groove 1112, and the thermal conductive material filling groove 1112 is connected with the glue overflow groove 1113, and the depth of the glue overflow groove 1113 is deeper than the thermal conductive material filling groove 1112, so that when the main board 1121 is installed in the shell 111, the thermal conductive glue squeezed out by the main board 1121 and the shell 111 can flow into the glue overflow groove 1113.

[0044] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the housing 111 includes a main housing 1114 and a side cover 1115 that are locked together. An opening is provided on a side of the main housing 1114 adjacent to the light outlet 1111, and the side cover 1115 is covered on the opening.

[0045] Specifically, when assembling the laser radar transmitting module 110 provided in the present application, the laser transmitting assembly 112 is first placed in the main shell 1114 through the opening, that is, the thermal conductive material is first laid in the thermal conductive material filling groove 1112 in the main shell 1114, and then the main board 1121 and the shell 111 are connected, and the laser 1122 is set on the side of the main board 1121 away from the shell 111, and the positions of the main board 1121 and the laser 1122 are adjusted so that the light beam emitted by the laser 1122 can pass through the light outlet 1111, and then the fast axis cylindrical mirror 114 is installed on the mounting surface 1131 of the positioning platform 113, and the position of the fast axis cylindrical mirror 114 on the mounting surface 1131 of the positioning platform 113 is adjusted by the AA process, and after the position is determined, the fast axis cylindrical mirror 114 is fixed on the mounting surface 1131 of the positioning platform 113, and then the side cover 1115 is covered on the main shell 1114.

[0046] In a feasible embodiment of the present application, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the main shell 1114 is provided with a locking protrusion 1114a, and the side cover 1115 is provided with a locking groove 1115a that is locked with the locking protrusion 1114a. The side cover 1115 and the main shell 1114 are connected by the locking protrusion 1114a and the locking groove 1115a.

[0047] Specifically, the side cover 1115 includes a cover plate and a connecting plate arranged on both sides of the cover plate, a slot 1115a is arranged on the connecting plate, and a protrusion 1114a is arranged at the bottom and top of the main shell 1114. The slot 1115a on the connecting plate is clamped with the protrusion 1114a at the bottom and top of the main shell 1114 to ensure a stable connection between the side cover 1115 and the main shell 1114.

[0048] When assembling the laser radar transmitting module 110 provided in the present application, the laser transmitting assembly 112 is first placed in the main shell 1114 through the opening, that is, the thermal conductive material is first laid in the thermal conductive material filling groove 1112 in the main shell 1114, and then the main board 1121 and the shell 111 are connected, and the laser 1122 is set on the side of the main board 1121 away from the shell 111, and the positions of the main board 1121 and the laser 1122 are adjusted so that the light beam emitted by the laser 1122 can pass through the light outlet 1111, and then the fast axis cylindrical mirror 114 is installed on the mounting surface 1131 of the positioning platform 113, and then the side cover 1115 is covered on the main shell 1114, that is, the card slot 1115a of the side cover 1115 is clamped with the card protrusion 1114a of the main shell 1114 to complete the assembly of the laser radar transmitting module 110.

[0049] The embodiment of the present application also discloses a laser radar 100, including a carrier frame 120, a laser radar receiving module 130, and the laser radar transmitting module 110 in the aforementioned embodiment. The laser radar 100 includes the same structure and beneficial effects as the laser radar transmitting module 110 in the aforementioned embodiment. The structure and beneficial effects of the laser radar transmitting module 110 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0050] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A laser radar transmitting module, characterized in that: It includes a shell with a accommodating chamber and a laser emitting component arranged in the accommodating chamber. A light outlet connected to the accommodating chamber is opened on one side of the shell. A positioning platform is arranged on the shell, and a fast-axis cylindrical mirror is arranged on the positioning platform. The light beam emitted by the laser emitting component passes through the light outlet and is collimated by the fast-axis cylindrical mirror.

2. The laser radar transmitting module according to claim 1, characterized in that: The positioning platform has a mounting surface, the mounting surface is flush with the bottom of the light outlet, and the fast axis cylindrical mirror is arranged on the mounting surface.

3. The laser radar transmitting module according to claim 2, characterized in that: The fast axis cylindrical mirror and the mounting surface are bonded by UV curing adhesive.

4. The laser radar transmitting module according to claim 1, characterized in that: The laser emitting assembly comprises a main board and a laser arranged on the main board. The main board is connected to the housing. The light beam emitted by the laser passes through the light outlet and is collimated by the fast axis cylindrical mirror.

5. The laser radar transmitting module according to claim 4, characterized in that: A heat-conducting material is filled between the mainboard and the shell.

6. The laser radar transmitting module according to claim 5, characterized in that: A heat-conducting material filling groove is arranged in the shell, and the heat-conducting material is laid in the heat-conducting material filling groove.

7. The laser radar transmitting module according to claim 6, characterized in that: A glue overflow groove is arranged on the periphery of the heat conductive material filling groove, and the heat conductive material filling groove is communicated with the glue overflow groove.

8. The laser radar transmitting module according to claim 1, characterized in that: The housing comprises a main shell and a side cover which are clamped together. An opening is arranged on a side surface of the main shell adjacent to the light outlet, and the side cover is arranged on the opening.

9. The laser radar transmitting module according to claim 8, characterized in that: The main shell is provided with a clamping protrusion, and the side cover is provided with a clamping groove clamped with the clamping protrusion, and the side cover and the main shell are connected by clamping the clamping protrusion with the clamping groove.

10. A laser radar, characterized in that: It comprises a carrier frame, a laser radar receiving module and the laser radar transmitting module according to any one of claims 1 to 9, wherein the laser radar transmitting module and the laser radar receiving module are arranged on the carrier frame.

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