Reflector mounting structure and laser radar

Abstract

The present invention discloses a reflector mounting structure and a laser radar, wherein the reflector mounting structure comprises a mounting shell and a reflector assembly, wherein the mounting shell is formed with a receiving cavity, wherein a laser passing path is formed in the receiving cavity, wherein an outer wall of the mounting shell is provided with a mounting hole connected to the receiving cavity, and wherein the mounting hole is located on the laser passing path, and wherein the reflector assembly comprises two first reflectors with oppositely arranged reflecting surfaces, wherein one of the two first reflectors is arranged on the outer wall of the mounting shell, and wherein the reflecting surface of the reflector is exposed to the receiving hole, and the other is arranged in the receiving cavity, and wherein the reflecting surface is located on the laser passing path. Under the premise of ensuring the structural strength, the distance between the two reflectors can be increased to the maximum extent, thereby increasing the transmission path of the laser beam between the reflectors, and providing a larger space for the subsequent assembly and debugging of the emission point.

Description

Technical Field

[0001] The present invention relates to the technical field of laser radar, and in particular to a reflector mounting structure and a laser radar. Background Art

[0002] The optical system path of the laser radar can be simply described in order: laser beam emission, laser beam transmission, and laser beam reception. Once the focal length and aperture of the optical system are determined, the straight-line distance of the laser beam transmission path is determined. Usually, in order to constrain the straight-line distance within a certain size of space, a reflector is arranged at a suitable position to reflect and bend the straight-line beam. The angle and position of the reflector determine the bending path of the laser beam.

[0003] Mechanical laser radars are developing towards miniaturization and lightness, with higher integration and smaller size. Miniaturization requires full and reasonable use of the space inside the radar. The common reflector installation structure occupies a large space, which makes the installation space very limited, adding great difficulty to the optical installation process. Summary of the invention

[0004] The main purpose of the present invention is to propose a reflector mounting structure and a laser radar, aiming to increase the transmission path of the laser beam between the reflectors and provide a larger space for subsequent assembly and debugging of the emission point.

[0005] To achieve the above object, the reflector mounting structure proposed in the present invention is used for a laser radar, and the reflector mounting structure comprises:

[0006] A mounting shell is formed with a receiving cavity, a laser passing path is formed in the receiving cavity, an outer wall of the mounting shell is penetrated with a mounting hole connected to the receiving cavity, and the mounting hole is located on the laser passing path; and,

[0007] The reflector assembly includes two first reflectors with reflective surfaces arranged opposite to each other. One of the two first reflectors is arranged on the outer wall of the mounting shell, and the reflective surface of the reflector is exposed in the mounting hole, and the other is arranged in the accommodating cavity and is located on the path of the laser.

[0008] Optionally, the laser passing path includes a laser emission path and a laser receiving path;

[0009] The mounting hole and the two first reflectors are correspondingly arranged as a reflective group, and two reflective groups are arranged and are respectively located on the laser emission path and the laser receiving path.

[0010] Optionally, the inner side wall of the accommodating cavity is provided with a placement groove;

[0011] The first reflecting mirror in the accommodating cavity is arranged in the accommodating groove.

[0012] Optionally, one side wall of the mounting shell is a mounting side wall;

[0013] The placement groove is arranged to penetrate the installation side wall;

[0014] The first reflector is installed in the accommodating cavity from the installation side wall.

[0015] Optionally, the first reflector is adhered to the placement groove;

[0016] The inner side wall of the placement groove and the wall surface that contacts the first reflector are the installation wall surfaces, and the area on the installation wall surface corresponding to the first reflector are the first installation areas;

[0017] The installation side wall is provided with a first glue containing groove connected to the placement groove, and the first glue containing groove is at least partially located in the first installation area.

[0018] Optionally, the first reflector is adhered to the inner wall of the accommodating cavity.

[0019] Optionally, the mounting hole is arranged in a stepped manner to form a stepped surface away from the accommodating cavity;

[0020] The first reflector arranged on the outer side wall of the installation shell is bonded on the step surface.

[0021] Optionally, the area of ​​the step surface corresponding to the first reflector is the second installation area;

[0022] A second glue containing groove is disposed on the step surface, and the second glue containing groove is at least partially located on the second installation area.

[0023] The present invention also provides a laser radar, comprising the above-mentioned reflector mounting structure.

[0024] Optionally, the laser radar further includes:

[0025] an emitting device, comprising a laser emitter disposed in the accommodating cavity, the laser emitter being located on the laser emission path and used for emitting laser light; and

[0026] The receiving device comprises a laser receiver arranged in the accommodating cavity, the laser receiver is located on the laser receiving path, and is used for receiving the laser emitted by the emitting device and reflected by the object.

[0027] In the technical solution provided by the present invention, the two first reflectors are both located on the path through which the laser passes, and the reflector surfaces are arranged opposite to each other. When the laser light is emitted onto the reflector surface of one of the first reflectors, it is transmitted to the reflector surface of the other first reflector through the reflection principle, and is irradiated onto the object after being reflected again. One of the two first reflectors is placed in the accommodating cavity, and the other reflects the laser light through the mounting hole on the outer side of the mounting shell. Under the premise of ensuring the structural strength, the distance between the two reflectors can be increased to the maximum extent, thereby increasing the transmission path of the laser beam between the reflectors, and providing more space for subsequent assembly and debugging of the emission point. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic top view of an embodiment of a reflector mounting structure provided by the present invention;

[0030] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a middle reflector mounting structure.

[0031] Description of Figure Numbers:

[0032] Label name Label name 100 Reflector mounting structure 13 Placement slot 1 Mounting housing 131 Wall mounting 11 Accommodation cavity 2 Reflector assembly 12 Mounting holes 21 First reflector 121 Step surface

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0037] Mechanical LiDAR is being promoted in more and more application scenarios, especially airborne LiDAR and UAV, which have strict restrictions on the size and weight of LiDAR. This requires that LiDAR must be more compact and the spatial dimensions of each part must be compressed to the extreme.

[0038] In the common design of mechanical laser radar, two reflectors are arranged between the laser beam emission point and the laser emission main lens barrel. Similarly, two reflectors are arranged between the laser receiving main lens barrel and the laser beam receiving point. In this way, the structure can be roughly divided into two areas: the emission area and the receiving area. In addition, the emission area is arranged with a transmitting circuit board assembly, and the receiving area is arranged with a receiving circuit board assembly. During the optical assembly and adjustment process of the mechanical laser radar, the transmitting circuit assembly and the receiving circuit assembly need to be adjusted in their respective areas, such as front and back, left and right, up and down, and angle swing. In this way, the laser radar achieves the best optical performance.

[0039] The same type of products are currently larger in size, and the common reflector installation position is pasted on the surface of the inner cavity of the main structure. In addition, the installation space of the transmitting point and the receiving point is very limited, which greatly increases the difficulty of the optical installation process and seriously affects the installation efficiency of the entire LiDAR product. In the future market competition, it will gradually be replaced by compact radars. The more scientific, reasonable and compact bending path design of the optical system path can further improve the compactness of the LiDAR structure and make the product installation more convenient and quick.

[0040] The present invention proposes a reflector mounting structure and a laser radar, which can further increase the distance between the two reflectors, thereby increasing the transmission path of the laser beam between the reflectors. Under the premise of a certain focal length, the laser beam transmission path between the laser beam emission point and the reflector can be reduced. In this way, the emission point can be closer to the reflector, providing more space for subsequent assembly and debugging of the emission point. Figure 1 to Figure 2 A schematic diagram of an embodiment of a reflector mounting structure and a laser radar provided by the present invention.

[0041] Please refer to Figure 1 The reflector mounting structure 100 includes a mounting shell 1 and a reflector assembly 2, wherein the mounting shell 1 is formed with a housing cavity 11, and a laser passage path is formed in the housing cavity 11. The outer wall of the mounting shell 1 is penetrated with a mounting hole 12 connected to the housing cavity 11, and the mounting hole 12 is located on the laser passage path. The reflector assembly 2 includes two first reflectors 21 whose reflective surfaces are arranged opposite to each other. One of the two first reflectors 21 is arranged on the outer wall of the mounting shell 1, and the reflective surface of the reflector is exposed to the mounting hole 12, and the other is arranged in the housing cavity 11 and is located on the laser passage path.

[0042] In the technical solution provided by the present invention, the two first reflectors 21 are both located on the path through which the laser passes, and the reflector surfaces are arranged opposite to each other. When the laser light is emitted to the reflector surface of one of the first reflectors 21, it is transmitted to the reflector surface of the other first reflector 21 through the reflection principle, and is irradiated onto the object after being reflected again. The two first reflectors 21, one is placed in the accommodating cavity 11, and the other reflects the laser light through the mounting hole 12 on the outer side of the mounting shell 1. Under the premise of ensuring the structural strength, the distance between the two reflectors can be increased to the maximum extent, thereby increasing the transmission path of the laser beam between the reflectors, and providing more space for the subsequent assembly and debugging of the emission point.

[0043] Furthermore, in this example, the laser path includes a laser emission path and a laser receiving path, and the mounting hole 12 and the two first reflectors 21 are correspondingly arranged as a reflection group, and two reflection groups are arranged, and are respectively located on the laser emission path and the laser receiving path. The two reflection groups allow the laser to be reflected from the laser emission path to the object, and the light reflected from the object is then returned through the laser receiving path, so that both the emission point and the receiving point have a larger adjustment space, and the radar detection effect is better.

[0044] Furthermore, the first reflector 21 is adhered to the inner wall of the accommodating cavity 11. Such a fixing method has a simple structure and is quick to install.

[0045] In order to facilitate the installation of the first reflector 21 in the accommodating cavity 11, in this example, please refer to Figure 2 The inner side wall of the accommodating cavity 11 is provided with a placement groove 13, and the first reflector 21 in the accommodating cavity 11 is arranged in the placement groove 13. In this way, the shape of the placement groove 13 matches the first reflector 21, and this arrangement is convenient for installation and positioning.

[0046] Furthermore, in order to facilitate installation and disassembly, in this example, one side wall of the installation housing 1 is the installation side wall, the placement groove 13 is arranged to penetrate the installation side wall, and the first reflector 21 is installed into the accommodating cavity 11 from the side of the installation side wall. Figure 2 Taking the position and orientation shown as an example, the installation side wall is the upper wall surface of the installation shell 1, the mounting groove 13 passes through the upper end of the installation shell 1, and the first reflector 21 extends from the opening of the upper end into the mounting groove 13. The open structure facilitates installation and disassembly.

[0047] In order to fix the first reflector 21 in the placement groove 13, in this example, the first reflector 21 is adhered to the placement groove 13, the inner side wall of the placement groove 13 and the wall surface of the first reflector 21 in contact with each other is the installation wall surface 131, the area on the installation wall surface 131 corresponding to the first reflector 21 is the first installation area, and the installation side wall is provided with a first glue containing groove connected to the placement groove 13, and the first glue containing groove is at least partially located in the first installation area. Glue is injected through the first glue containing groove, and the first reflector 21 is surrounded by glue on three sides, so that the fixing method has a simple structure and is quick to install.

[0048] The reflective mirror surface of the first reflector 21 disposed on the outer wall of the mounting housing 1 passes through the mounting hole 12. Further, in order to facilitate the installation of the first reflector 21 on the mounting housing 1, please refer to Figure 2 In this embodiment, the mounting hole 12 is arranged in a stepped manner to form a stepped surface 121 away from the accommodating cavity 11, and the first reflector 21 arranged on the outer wall of the mounting housing 1 is bonded to the stepped surface 121. Such an arrangement facilitates the installation and positioning of the first reflector 21.

[0049] Specifically, the first reflector 21 is adhered to the step surface 121. In this embodiment, the area of ​​the step surface 121 corresponding to the first reflector 21 is the second installation area. A second glue-containing groove is provided on the step surface 121. The second glue-containing groove is at least partially located on the second installation area. Glue is injected through the second glue-containing groove, and the first reflector 21 is surrounded by glue on all four sides. Such a fixing method has a simple structure and is quick to install.

[0050] The present invention also proposes a laser radar, including all the technical features of the above-mentioned reflector mounting structure 100, and therefore, also has the technical effects brought by all the above-mentioned technical features, which will not be described one by one here.

[0051] Furthermore, the laser radar also includes a transmitting device and a receiving device, wherein the transmitting device includes a laser transmitter disposed in the accommodating cavity 11, the laser transmitter is on the laser transmitting path, and is used to transmit laser light, and the receiving device includes a laser receiver disposed in the accommodating cavity 11, the laser receiver is on the laser receiving path, and is used to receive laser light emitted by the transmitting device and reflected back by an object. The laser transmitter emits a laser light of a specific wavelength, a short-wave near-infrared laser light, which is emitted to irradiate an object, reflected back by the object, and received by the laser receiver, forming a complete radar detection path.

[0052] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A reflector mounting structure, used in a laser radar, characterized in that: include: The mounting shell is formed with a receiving cavity, a laser passing path is formed in the receiving cavity, an outer wall of the mounting shell is penetrated with a mounting hole connected with the receiving cavity, and the mounting hole is located on the laser passing path, and the mounting shell is set as a columnar structure; and A reflector assembly, comprising two first reflectors with reflective surfaces arranged opposite to each other, one of the two first reflectors being arranged on the outer side wall of the mounting housing and having its reflective surface exposed to the mounting hole, and the other being arranged in the accommodating cavity and on the path through which the laser passes; The laser passing path includes a laser emission path and a laser receiving path; The mounting hole and the two first reflectors are correspondingly arranged as a reflector group. Two reflector groups are arranged and are respectively located on the laser emission path and the laser receiving path. The orientations of the two first reflectors in the same laser path are staggered and are not directly facing each other in a straight line.

2. The reflector mounting structure according to claim 1, characterized in that: The inner side wall of the accommodating cavity is provided with a placement groove; The first reflecting mirror in the accommodating cavity is arranged in the accommodating groove.

3. The reflector mounting structure according to claim 2, characterized in that: One side wall of the mounting shell is a mounting side wall; The placement groove is arranged to penetrate the installation side wall; The first reflector is installed in the accommodating cavity from the installation side wall.

4. The reflector mounting structure according to claim 3, characterized in that: The first reflector is adhered to the placement groove; The inner side wall of the placement groove and the wall surface that contacts the first reflector are the installation wall surfaces, and the area on the installation wall surface corresponding to the first reflector are the first installation areas; The installation side wall is provided with a first glue containing groove connected to the placement groove, and the first glue containing groove is at least partially located in the first installation area.

5. The reflector mounting structure according to claim 1, characterized in that: The first reflector is adhered to the inner side wall of the accommodating cavity.

6. The reflector mounting structure according to claim 1, characterized in that: The mounting hole is arranged in a stepped manner to form a stepped surface away from the accommodating cavity; The first reflector arranged on the outer side wall of the installation shell is bonded on the step surface.

7. The reflector mounting structure according to claim 6, characterized in that: The area of ​​the step surface corresponding to the first reflector is a second installation area; A second glue containing groove is disposed on the step surface, and the second glue containing groove is at least partially located on the second installation area.

8. A laser radar, characterized in that: It comprises a reflector mounting structure as claimed in any one of claims 1 to 7.

9. The laser radar according to claim 8, characterized in that: Also includes: an emitting device, comprising a laser emitter disposed in the accommodating cavity, the laser emitter being located on the laser emission path and used for emitting laser light; and The receiving device comprises a laser receiver arranged in the accommodating cavity, the laser receiver is located on the laser receiving path, and is used for receiving the laser emitted by the emitting device and reflected by the object.

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