Reflection unit and LiDAR

Abstract

This application provides a reflective unit and a lidar. The reflective unit includes a front reflector and an integrated reflector bracket. The integrated reflector bracket includes multiple reflector bracket lugs and multiple reflector backplates. Each reflector backplate fixes one front reflector. The multiple reflector bracket lugs are spaced apart along the width direction of the integrated reflector bracket. The vertical position of the reflector bracket lugs is higher than the lowest point of the integrated reflector bracket. In the reflective unit of this application, multiple front reflectors are fixed on an integrated reflector bracket, which is an integrated structure, making molding and assembly easier. The reflector bracket lugs being higher than the lowest point of the integrated reflector bracket can raise the connection point of the integrated reflector bracket to reduce its overall height.

Description

Technical Field

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

[0002] LiDAR is a radar system that emits laser beams to detect the position, speed and other characteristic quantities of a target. Its working principle is to first emit a detection laser beam to the target, then compare the received signal reflected from the target with the transmitted signal and make appropriate processing to obtain relevant information about the target, such as target distance, direction, height, speed, attitude, and even shape. In recent years, with the vigorous development of the unmanned driving (including autonomous driving vehicles, AGV, UAV, etc.) market, the demand for LiDAR is growing.

[0003] Existing laser radars generally include a multi-channel laser light receiving and transmitting circuit. Most current laser radars are equipped with multiple multi-channel laser light receiving and transmitting circuits, and multiple front reflectors with different angles need to be installed inside the laser radar through multiple reflector brackets to reflect the laser beam. This is not only not conducive to the miniaturization of laser radars, but also requires a large number of molds for multiple reflector brackets, which is costly, and the assembly process of multiple reflectors is cumbersome. Summary of the invention

[0004] In order to solve the existing technical problems, the present application provides a reflection unit and a laser radar, which can make the reflection unit structure compact, reduce costs and be easy to install.

[0005] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] On the one hand, an embodiment of the present application provides a reflection unit, including a front reflector and an integrated reflector bracket; the integrated reflector bracket includes a plurality of reflector bracket lugs and a plurality of reflector support plates, each of the reflector support plates fixes one of the front reflectors, and the plurality of reflector bracket lugs are arranged at intervals in the width direction of the integrated reflector bracket; the position of the reflector bracket lugs in the vertical direction is higher than the lowest point of the integrated reflector bracket.

[0007] In one embodiment, the reflector backing plate is in the shape of a flat plate, and a plurality of the reflector backing plates are arranged to intersect each other in pairs; a light opening is provided in the center of the reflector backing plate, and a plurality of glue holes are provided on both sides of the light opening; the front reflector is installed on one side of the reflector backing plate and closes the light opening.

[0008] In one embodiment, the light passage is a rectangular opening, and at least two or more glue dispensing holes are provided on one side of the light passage.

[0009] In one embodiment, the integrated reflector bracket includes a bracket side panel, and the outer edge of the outer reflector support plate is provided with the bracket side panel, and the bracket side panels are arranged vertically front and back; a reflector bracket lug extends from the outer side of each bracket side panel.

[0010] In one embodiment, the integrated reflector bracket includes a backrest connecting plate, which connects the edges of adjacent reflector backrest plates; a reflector bracket lug extends from the rear side of each backrest connecting plate.

[0011] In one of the embodiments, at least one reflector bracket mounting hole is opened on the reflector bracket lug in the vertical direction, two reflector bracket mounting holes are spaced apart from each other on the reflector bracket lug on the outer side of the bracket side plate, and one reflector bracket mounting hole is provided on the reflector bracket lug on the rear side of the surface connecting plate.

[0012] In one embodiment, the integrated reflector bracket further comprises a bracket bottom plate, and the bracket bottom plate is connected to the bottom of the reflector back plate and the back surface connecting plate.

[0013] On the other hand, an embodiment of the present application provides a laser radar, including a shell, a laser transceiver assembly, a reflection unit as described above, a galvanometer unit and a circuit board unit, the shell includes an upper cover and a base, the upper cover and the base are buckled together to form a hollow cavity, the reflection unit and the galvanometer unit are installed on the laser transceiver assembly, and the laser transceiver assembly is arranged in the hollow cavity and fixed on the base.

[0014] In one embodiment, the laser transceiver assembly includes a transceiver lens module, multiple laser units and multiple detector units; the transceiver lens module includes a transceiver lens housing and multiple groups of transceiver lens groups, the transceiver lens housing includes a transceiver lens housing seat and a transceiver lens housing cover, which are snapped together to form a storage cavity for multiple groups of the transceiver lens groups; the integrated reflector bracket is installed on the transceiver lens housing seat.

[0015] In one embodiment, a front end of the transceiver lens housing is provided with a plurality of reflective unit mounting lugs, and the reflector support lugs are mounted on the reflective unit mounting lugs.

[0016] The reflective unit and laser radar of the present application have at least the following beneficial effects: in the reflective unit and laser radar of the present application, multiple front reflectors are fixed on an integrated reflector bracket, and the integrated reflector bracket is an integrated structure, which makes mold opening and assembly easier; the reflector bracket lug is higher than the lowest point of the integrated reflector bracket, and the connection point position of the integrated reflector bracket can be raised to compress the height, thereby avoiding the height of the entire machine being too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional diagram of a reflection unit according to an embodiment of the present application;

[0018] Figure 2 for Figure 1 A three-dimensional image of the middle reflective unit from another angle;

[0019] Figure 3 for Figure 1 The decomposition structure diagram of the reflection unit;

[0020] Figure 4 for Figure 2 The decomposition structure diagram of the reflection unit;

[0021] Figure 5 A three-dimensional diagram of a laser radar according to an embodiment of the present application;

[0022] Figure 6 for Figure 5 A stereoscopic image of the laser radar from another angle;

[0023] Figure 7 for Figure 5 An exploded perspective view of the laser radar from another angle;

[0024] Figure 8 for Figure 7 A magnified view of the laser transceiver assembly, reflector unit, and galvanometer unit;

[0025] Fig. 9 for Figure 7 The exploded view of the laser transceiver assembly, reflector unit, and galvanometer unit;

[0026] Fig.10 This is a disassembled diagram of the reflective unit 7, the laser transceiver assembly, and the galvanometer unit.

[0027] The components in the figure are labeled as follows:

[0028] Housing 100 (including upper cover 110 and base 120);

[0029] Laser transceiver assembly 200 (including laser unit 210, transceiver lens module 220, detector unit 230; transceiver lens housing seat 222, transceiver lens housing cover 223; reflector unit mounting lug 2253; reflector bracket fastening hole 22531);

[0030] Reflection unit 300 (including front reflector 310, integrated reflector bracket 320, reflector bracket fastener 330; reflector bracket lug 321, reflector support plate 322, bracket side plate 323, support surface connecting plate 324, bracket bottom plate 325; reflector bracket mounting hole 3211; light through hole 3221, glue dispensing hole 3222);

[0031] Galvanometer unit 400;

[0032] Circuit board assembly 500 . DETAILED DESCRIPTION

[0033] The technical solution of the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0036] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0037] As mentioned above, in order to solve the problems of large number of molds and high production cost in the existing multi-reflector reflector assemblies, the present application provides a reflection unit, including a front reflector and an integrated reflector bracket, and multiple front reflectors are installed on the integrated reflector bracket; the integrated reflector bracket includes a reflector back plate, a back surface connecting plate and a reflector bracket lug, each reflector back plate fixes a front reflector, the edges of adjacent reflector back plates are directly connected or connected through the back surface connecting plate, and the multiple reflector bracket lugs are arranged at intervals in the width direction of the integrated reflector bracket; each reflector bracket lug is provided with at least one reflector bracket mounting hole for the reflector bracket fastener to pass through, and the reflector bracket lug is positioned higher in the vertical direction than the lowest point of the integrated reflector bracket.

[0038] See also Figure 1 and Figure 2 The reflective unit 300 of one embodiment of the present application includes a front reflector 310, an integrated reflector bracket 320 and a reflector bracket fastener 330 (see Figure 7 ). A plurality of front reflectors 310 are fixed on the integrated reflector bracket 320 and are fixed (to the front end of the optical lens assembly 220) by means of the reflector bracket fastener 330. In the illustrated embodiment, corresponding to the four groups of laser light receiving and transmitting paths, four front reflectors 310 at different angles are fixed on the integrated reflector bracket 320 to reflect the laser beam out.

[0039] Please refer to Figure 3 and Figure 4 The integrated reflector bracket 320 is an integrally formed part, including a reflector back plate 322, a back surface connecting plate 324, a bracket side plate 323, a reflector bracket lug 321 and a bracket bottom plate 325. Each reflector back plate 322 is used to fix a front reflector 310. The edges of adjacent reflector back plates 322 are directly connected or connected through the back surface connecting plate 324. The outer edge of the outer reflector back plate 322 is provided with a bracket side plate 323. The integrated reflector bracket 320 is provided with a plurality of reflector bracket lugs 321 at intervals in the width direction. The bracket bottom plate 325 is connected to the bottom of the reflector back plate 322 and the back surface connecting plate 324 to increase the overall structural strength.

[0040] To facilitate installation of the reflective unit 300 , at least one reflective mirror bracket mounting hole 3211 is vertically provided on each reflective mirror bracket lug 321 , so that the reflective unit 300 can be mounted to a desired fixed position by passing the reflective mirror bracket fastener 330 through the reflective mirror bracket mounting hole 3211 .

[0041] The reflector support plate 322 is in the shape of a flat plate, and a plurality of reflector support plates 322 are arranged to intersect each other in pairs, so that the laser beams directed to the corresponding front reflectors 310 are at different angles. A light opening 3221 is provided in the middle of the reflector support plate 322, and a plurality of glue holes 3222 are provided on both sides of the light opening 3221. The front reflector 310 is mounted on the front side of the reflector support plate 322 and the light opening 3221 is closed, and the laser beam can be directed to the front reflector 310 through the light opening 3221. The front reflector 310 can be bonded to the reflector support plate 322 by injecting glue to the edge of the front reflector 310 through the plurality of glue holes 3222. Since the plurality of reflector support plates 322 are at different angles, the plurality of front reflectors 310 are mounted on the integrated reflector bracket 320 at different angles. In the illustrated embodiment, the light opening 3221 is a rectangular opening, and at least two or more circular glue holes 3222 are provided on one side of the light opening 3221. The fitting surface of the front reflector 310 and the reflector backing plate 322 is fully surrounded, and the lateral peripheral stray light except the position of the light opening 3221 is difficult to pass through, thereby avoiding crosstalk.

[0042] The surface connection plate 324 and the bracket side plate 323 are both flat plates, and the bracket side plates 323 are arranged front and back in the vertical direction, and the bracket side plates 323 on both sides are arranged in parallel. The reflector back plate 322 and the surface connection plate 324 are folding plates connected in sequence between the bracket side plates 323 on both sides, and the bracket bottom plate 325 is connected from the bottom to the bottom edge of the bracket side plate 323, the bottom edge of the reflector back plate 322, and the bottom edge of the surface connection plate 324, so that the integrated reflector bracket 320 can have a higher structural strength.

[0043] The reflector bracket lug 321 is horizontally arranged and is the installation connection of the integrated reflector bracket 320. The reflector bracket lug 321 is located higher than the lowest point of the integrated reflector bracket 320 in the vertical direction, that is, the reflector bracket lug 321 is located in the middle of the integrated reflector bracket 320 in the vertical direction, which can provide the reflector bracket fastener 330 with the required movement distance for tightening in the height direction, thereby avoiding increasing the height of the reflective unit 300 and the height required for installing the reflective unit 300.

[0044] In the illustrated embodiment, a reflector bracket lug 321 extends from the outer side of each bracket side plate 323, and two reflector bracket mounting holes 3211 are provided on the outer reflector bracket lug 321 at intervals in front and back; a reflector bracket lug 321 extends from the rear side of each surface connection plate 324, and a reflector bracket mounting hole 3211 is provided on the rear reflector bracket lug 321. In this way, the integrated reflector bracket 320 has multiple mounting connections (reflector bracket lugs 321), and the connection between the reflector bracket lugs 321 and the back plate (the surface connection plate 324 or the bracket side plate 323) can have a high strength; each mounting connection provides one or more connection points, so that the reflective unit 300 can be firmly and stably installed and fixed.

[0045] In the above-mentioned reflection unit 300, multiple front reflectors 310 with inconsistent angles are fixed on an integrated reflector bracket 320, which can realize a three-dimensional angle combination. The integrated reflector bracket 320 has an integrated structure, which makes mold opening and assembly easier; the reflector bracket lug 321 is higher than the lowest point of the integrated reflector bracket 320, and the connection point position of the integrated reflector bracket 320 can be raised to compress the height, thereby avoiding the height of the whole machine being too high; the integrated reflector bracket 320 is installed and fixed by the reflector bracket fastener 330, so that the base design for installing the reflection unit 300 is convenient, and only fastening holes (such as bolt holes) need to be provided.

[0046] See also Figures 5 to 7 A laser radar of an embodiment of the present application includes a housing 100, a laser transceiver assembly 200, a reflection unit 300, a galvanometer unit 400 and a circuit board assembly 500. The laser transceiver assembly 200, the reflection unit 300, the galvanometer unit 400 and the circuit board assembly 500 are all arranged in the housing 100.

[0047] The housing 100 includes an upper cover 110 and a base 120 . The upper cover 110 is buckled with the base 120 from above to form a hollow cavity.

[0048] The laser transceiver assembly 200 is fixed on the base 120, and is used to provide a scanning laser beam and receive an echo beam reflected by a sensing target object.

[0049] The reflection unit 300 is fixed at the front end of the laser transceiver assembly 200 , and is arranged relative to the laser transceiver assembly 200 and the galvanometer unit 400 to achieve the steering propagation of the laser beam between the laser transceiver assembly 200 and the galvanometer unit 400 .

[0050] The galvanometer unit 400 is fixed to the upper front end of the laser transceiver assembly 200 and is used to deflect the laser beam to achieve laser scanning.

[0051] The circuit board assembly 500 is fixed on the laser transceiver assembly 200. The circuit board assembly 500 is used to control the operation of the entire laser radar. The received signal reflected from the target object is compared with the transmitted signal and processed appropriately to infer the outline, distance, direction, speed, etc. of the target object.

[0052] Please refer to Figures 8 to 10 The laser transceiver assembly 200 includes a plurality of laser units 210 , a transceiver lens module 220 and a plurality of detector units 230 . The laser units 210 and the detector units 230 are installed in pairs at the rear end of the transceiver lens module 220 .

[0053] The transceiver lens module 220 includes a transceiver lens housing and multiple transceiver lens groups (not shown) installed in the transceiver lens housing. The transceiver lens housing includes a transceiver lens housing seat 222 and a transceiver lens housing cover 223. The transceiver lens housing seat 222 and the transceiver lens housing cover 223 are buckled together to form a storage cavity for multiple transceiver lens groups 221, and are locked by transceiver lens housing fasteners.

[0054] Each pair of laser unit 210 and detector unit 230 corresponds to a group of transceiver lens groups (not shown) in the transceiver lens module 220. In the illustrated embodiment, the laser unit 210 and the detector unit 230 are arranged at the rear end of the transceiver lens module 220, and the laser unit 210 and the corresponding detector unit 230 are arranged side by side adjacent to each other. Each laser unit 210 is mounted on the rear end of the transceiver lens module 220 through a laser bracket and fixed by glue; each detector unit 230 is directly mounted on the rear end of the transceiver lens module 220 and fixed by glue.

[0055] To facilitate installation of the reflective unit 300 , a reflective unit mounting lug 2253 is provided at the front end of the transceiver lens housing 222 , and a reflective mirror bracket lug 321 of the integrated reflective mirror bracket 320 is placed on the reflective unit mounting lug 2253 and is locked and fixed by a reflective mirror bracket fastener 330 .

[0056] In the illustrated embodiment, four reflective unit mounting lugs 2253 are provided at the front end of the transceiver lens housing 222, two outer reflective unit mounting lugs 2253 are respectively provided with two reflector bracket fastening holes 22531 at the front and rear, and one reflector bracket fastening hole 22531 is respectively provided on the two middle reflector mounting lugs 2252. The integrated reflector bracket 320 and the front reflector 310 fixed thereon by glue are fixed to the reflective unit mounting lugs 2253 at the front end of the transceiver lens housing 222 by a total of 6 points (reflector bracket fasteners 330).

[0057] In summary, the reflective unit and laser radar of the present application have at least the following advantages:

[0058] On the one hand, in the reflection unit, multiple front reflectors are fixed on an integrated reflector bracket, and the integrated reflector bracket is an integrated structure, which makes mold opening and assembly easier; the reflector bracket lug is higher than the lowest point of the integrated reflector bracket, and the connection point of the integrated reflector bracket can be raised to compress the height, thereby avoiding the entire machine from being too high; the integrated reflector bracket is installed and fixed by a reflector bracket fastener, making the installation of the reflection unit more convenient.

[0059] On the other hand, the angles of multiple reflectors in the reflection unit are inconsistent, which can achieve a three-dimensional angle combination; the angle of the reflector backing plate is adjusted according to the pasting direction of the front reflector, and the front reflector is fully attached, so that stray light around the lateral side of the front reflector is difficult to penetrate, thereby avoiding crosstalk.

[0060] On the other hand, the reflective unit is directly mounted on the transceiver lens module, which simplifies the structure, reduces the number of parts, saves assembly process, and reduces the number of molds, thereby reducing production costs.

[0061] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0062] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A reflection unit, characterized in that: The reflection unit (300) comprises a front reflector (310) and an integrated reflector bracket (320); the integrated reflector bracket (320) comprises a plurality of reflector bracket lugs (321) and a plurality of reflector support plates (322); each of the reflector support plates (322) fixes one of the front reflectors (310); the plurality of reflector bracket lugs (321) are arranged at intervals in the width direction of the integrated reflector bracket (320); the position of the reflector bracket lugs (321) in the vertical direction is higher than the lowest point of the integrated reflector bracket (320).

2. The reflection unit according to claim 1, characterized in that: The reflector backing plate (322) is in the shape of a flat plate, and a plurality of the reflector backing plates (322) are arranged to intersect each other in pairs; a light opening (3221) is provided in the center of the reflector backing plate (322), and a plurality of glue holes (3222) are provided on both sides of the light opening (3221); the front reflector (310) is mounted on one side of the reflector backing plate (322) and closes the light opening (3221).

3. The reflection unit according to claim 2, characterized in that: The light-through opening (3221) is a rectangular opening, and at least two or more glue dispensing holes (3222) are provided on one side of the light-through opening (3221).

4. The reflection unit according to claim 1, characterized in that: The integrated reflector bracket (320) comprises a bracket side plate (323), the outer edge of the outer reflector support plate (322) is provided with the bracket side plate (323), and the bracket side plate (323) is arranged vertically forward and backward; a reflector bracket lug (321) extends from the outer side of each bracket side plate (323).

5. The reflection unit according to claim 4, characterized in that: The integrated reflector support (320) comprises a backrest connecting plate (324), wherein the backrest connecting plate (324) connects the edges of adjacent reflector backrest plates (322); a reflector support lug (321) extends from the rear side of each backrest connecting plate (324).

6. The reflection unit according to claim 5, characterized in that: At least one reflector bracket mounting hole (3211) is provided on the reflector bracket lug (321) in the vertical direction, two reflector bracket mounting holes (3211) are provided on the reflector bracket lug (321) on the outside of the bracket side plate (323) at intervals in front and back, and one reflector bracket mounting hole (3211) is provided on the reflector bracket lug (321) on the rear side of the surface connection plate (324).

7. The reflection unit according to claim 5, characterized in that: The integrated reflector bracket (320) further comprises a bracket bottom plate (325), wherein the bracket bottom plate (325) is connected to the bottom of the reflector back plate (321) and the back surface connecting plate (324).

8. A laser radar, characterized in that: The invention comprises a housing (100), a laser transceiver assembly (200), a reflection unit (300) according to any one of claims 1 to 7, a galvanometer unit (400) and a circuit board unit (500), wherein the housing (100) comprises an upper cover (110) and a base (120), wherein the upper cover (110) and the base (120) are buckled together to form a hollow cavity, wherein the reflection unit (300) and the galvanometer unit (400) are mounted on the laser transceiver assembly (200), and the laser transceiver assembly (200) is arranged in the hollow cavity and fixed on the base (120).

9. The laser radar according to claim 8, characterized in that: The laser transceiver assembly (200) comprises a transceiver lens module (220), a plurality of laser units (210) and a plurality of detector units (230); the transceiver lens module (220) comprises a transceiver lens housing and a plurality of transceiver lens groups (221); the transceiver lens housing comprises a transceiver lens housing seat (222) and a transceiver lens housing cover (223), which are buckled together to form a storage cavity for the plurality of transceiver lens groups (221); the integrated reflector bracket (320) is mounted on the transceiver lens housing seat (222).

10. The laser radar according to claim 9, characterized in that: A plurality of reflective unit mounting lugs (2253) are provided at the front end of the transceiver lens housing seat (222), and the reflective mirror support lugs (321) are mounted on the reflective unit mounting lugs (2253).

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