CN219533394U - Housing, optical system and laser radar - Google Patents
Housing, optical system and laser radar Download PDFInfo
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- CN219533394U CN219533394U CN202320660690.8U CN202320660690U CN219533394U CN 219533394 U CN219533394 U CN 219533394U CN 202320660690 U CN202320660690 U CN 202320660690U CN 219533394 U CN219533394 U CN 219533394U
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- base
- outer cover
- transmittance
- driving plate
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Abstract
The utility model relates to the technical field of radar ranging devices, in particular to an outer cover, an optical system and a laser radar. The outer cover comprises an outer cover body with an opening structure at the lower end, a base connecting structure for connecting a base is arranged at the lower end of the outer cover body, a top plate and side walls of the outer cover body are made of high-light-transmittance materials, a shading structure is arranged on the lower end surface of the side walls of the outer cover body within a set height range, and the shading structure is a low-transmittance extinction paint coating, a low-transmittance reflecting film or a low-transmittance absorbing film. Through carrying out special processing to the dustcoat of high transmissivity, when external environment light is incident on the laser radar with different angles, the shading structure that the dustcoat lower extreme set up can keep off these environment light outside, makes external light unable to reach the inside photoelectric switch receiving terminal of laser radar to effectively prevent that environment light from interfering with laser radar and acquire angle information.
Description
Technical Field
The utility model relates to the technical field of radar ranging devices, in particular to an outer cover, an optical system and a laser radar.
Background
Along with the development of the times, the development of intelligent households is rapid, wherein the development of a sweeping robot is more prominent, and the sweeping robot relies on a laser radar to acquire the angle and position information of surrounding objects.
Conventional lidar acquires radar angle information by a combination of a coded disc and a photoelectric switch placed at the edge of the radar. In order to realize a larger range, a high-transmittance outer cover is generally used by the conventional laser radar, and at the moment, external environment light can also enter the laser radar through the outer cover to cause interference. When the laser radar is placed in a strong light environment, external light is transmitted into the radar through the outer cover 1 made of high-transmittance materials, and then is reflected by the surface of the coding disc 21 positioned on the base 2 to reach the receiving end 32 of the photoelectric switch 3, and at this time, the external light is received by the receiving end 32 of the photoelectric switch 3, so that the photoelectric switch 3 is misjudged (originally, when the coding disc 21 is positioned between the photoelectric switches 3, continuous light emitted by the emitting end 31 is blocked by the coding disc 21, and the receiving end 32 does not receive an optical signal but does not respond), and the optical path diagram is shown in fig. 1, so that the radar cannot obtain accurate angle information, and the radar diagram cannot autonomously rotate, flicker and cannot be mapped. The solution of patent document CN216209860U is to use two independent structural components in combination to realize shielding of stray light generated by an effective light pulse signal, but not to deal with interference generated by natural environment light (most typically natural light), and the additional components increase complexity of the assembly process and material cost. In addition, in the scheme of the Chinese patent application of the application number 202320486453.4 of the applicant, the extinction shielding of the external environment light is realized through the annular structure formed by combining the first side wall and the second side wall on the base, and the outer cover is not treated.
Disclosure of Invention
The utility model solves the technical problems that: the outer cover can effectively prevent external environment light from reaching the receiving end of the photoelectric switch after being arranged on the base, so that the laser radar can acquire interference-free and accurate angle information.
The technical scheme adopted for solving the technical problems is as follows: the outer cover comprises an outer cover body with an opening structure at the lower end, wherein a base connecting structure for connecting a base is arranged at the lower end of the outer cover body, a top plate and side walls of the outer cover body are made of high-light-transmittance materials, a shading structure is arranged on the lower end surface of the side walls of the outer cover body within a set height range, and the shading structure is a low-transmittance extinction paint coating, a low-transmittance reflecting film or a low-transmittance absorbing film.
In a preferred embodiment, the housing body includes a first region corresponding to the driving plate mounting region and a second region corresponding to the driving motor mounting region, the top plate of the second region being lower than the top plate of the first region, and the side wall of the first region, the side wall of the second region and the top plate of the second region are each provided with a light shielding structure.
In a preferred embodiment, the base connection structure is a combination of a snap structure and a screw via.
On the basis of adopting the technical scheme of the outer cover, the utility model simultaneously provides an optical system with strong capability of resisting ambient light interference, which comprises a base, a coding disc, a photoelectric switch and a driving plate, wherein the upper part of the base is provided with a first installation cavity corresponding to the installation area of the driving plate and a second installation cavity corresponding to the installation area of the driving motor, the photoelectric switch is fixedly arranged on the lower surface of the driving plate, the driving plate is rotatably arranged in the first installation cavity of the base, the coding disc is fixedly arranged in the first installation cavity of the base, the coding disc is distributed in a circular array, the coding disc is positioned below the driving plate, the arrangement position of the coding disc is matched with the position of the photoelectric switch, the outer cover is fixedly connected to the upper part of the base, the outer cover at least can be used for attaching the first installation cavity cover inside, the upper end edge position of the shading structure is higher than the upper surface of the driving plate, and the lower end edge position of the shading structure is lower than the signal receiving surface of the coding disc.
In a preferred embodiment, the housing body includes a first region corresponding to the driving plate mounting region and a second region corresponding to the driving motor mounting region, and the top plate upper surface of the second region is lower than the upper surface of the driving plate, and the side wall of the first region, the side wall of the second region and the top plate of the second region are all provided with light shielding structures.
In a preferred embodiment, the optoelectronic switch comprises a transmitting end and a receiving end, wherein the transmitting end faces outwards and the receiving end faces inwards, and the code wheel is arranged in a region between the transmitting end and the receiving end.
In a preferred embodiment, the housing is connected to the base by a combination of snap-fit and screw-fit connections.
On the basis of adopting the technical scheme of the optical system, the utility model simultaneously provides the laser radar with strong capability of resisting the interference of the ambient light.
The beneficial effects of the utility model are as follows: the outer cover with high transmittance is specially processed, so that external environment light can be effectively prevented from entering the laser radar to influence the acquisition of angle information, and meanwhile, the transmission of effective optical signals is not influenced. When external environment light is incident on the laser radar at different angles, the shading structure arranged on the lower end surface (both the inner surface and the outer surface) of the outer cover can shield the environment light outside, so that the external environment light can not reach the receiving end of the photoelectric switch in the laser radar, and the interference of the environment light on the laser radar to acquire angle information is effectively prevented. The low-transmittance extinction paint coating on the surface of the outer cover can be obtained by utilizing a spraying process, the low-transmittance reflecting film and the low-transmittance absorbing film can be applied to the outer cover through a coating process, the process is mature, the production and the processing are simple, and the cost is low.
Drawings
FIG. 1 is a schematic diagram of a conventional lidar optical path involved in the present utility model;
FIG. 2 is a schematic diagram of an explosion structure of the lidar according to the present utility model;
FIG. 3 is a cross-sectional view of a lidar according to the present utility model;
FIG. 4 is a perspective view of the housing of the present utility model (with the top plate of the housing facing downward and the lower end opening facing upward for ease of viewing the shade structure);
FIG. 5 is a cross-sectional view of a light shield according to the present utility model;
fig. 6 is a schematic diagram of the laser radar light path according to the present utility model.
The parts in the figure are marked as follows: the device comprises a housing 1, a base 2, a coding disc 21, a photoelectric switch 3, a transmitting end 31, a receiving end 32 and a driving plate 4.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description.
In the present utility model, directional terms such as up, down, left, right, front, rear, and azimuth are used to facilitate the description of the relative positional relationship between the members, and are not meant to refer specifically to the absolute position of the relative member or the inter-member relationship, but are used only to explain the relative positional relationship, movement, and the like between the members in a specific posture, and if the specific posture is changed, the directional terms are changed accordingly. In the present utility model, the terms "plurality", "a plurality" and the like refer to two or more.
As shown in fig. 2 to 5, the outer cover 1 according to the present utility model includes an outer cover body with an opening structure at the lower end, a base connection structure for connecting the base 2 is provided at the lower end of the outer cover body, the top plate and the side wall of the outer cover body are both made of high light-transmitting materials, and a light shielding structure is provided on the lower end surface of the side wall of the outer cover body within a predetermined height range, wherein the light shielding structure is a low-transmittance extinction paint coating, a low-transmittance reflective film or a low-transmittance absorption film.
The term "high light transmittance" as used herein is defined with reference to the term "low light transmittance" as used herein, and therefore the above definition is clear. The high light transmission material can be implemented by referring to the prior art, and the material with low transmittance is reasonably selected from the prior material by a person skilled in the art according to the shading effect of the material. The low-transmittance extinction paint coating on the surface of the outer cover 1 can be obtained by utilizing a spraying process, the low-transmittance reflecting film and the low-transmittance absorbing film can be applied to the outer cover 1 through a coating process, the process is mature, the production and the processing are simple, and the cost is low.
It is understood that the light shielding structure may be disposed on the inner surface and the outer surface of the side wall of the housing 1, and for the "set height range of the light shielding structure" defined by the present utility model, a person skilled in the art may perform an adaptive design according to the optical path of the laser radar, and the preferred scheme of the present utility model will be described in detail in the following optical system section.
In the prior art, the upper part of the base 2 is generally designed in a partition, and the upper part of the base 2 has a first mounting cavity corresponding to the mounting area of the drive plate 4 and a second mounting cavity corresponding to the mounting area of the drive motor. In order to simplify the assembly process, the housing 1 is preferably of an integrated design, the housing body comprises a first region 11 corresponding to the mounting region of the driving plate 4 and a second region 12 corresponding to the mounting region of the driving motor, the top plate of the second region 12 is lower than the top plate of the first region 11, and the side wall of the first region 11, the side wall of the second region 12 and the top plate of the second region 12 are all provided with light shielding structures. It will be appreciated that in the alternative, the housing 1 may cover only the first mounting cavity, the second mounting cavity being covered by a separately provided light-blocking cover.
It will be appreciated that there may be a variety of base connection structures, and in a preferred embodiment, the base connection structure is a combination of a snap structure and a screw via, which gives attention to both convenience in mounting and fixing and reliability of the connection structure.
On the basis of adopting the technical scheme of the outer cover, the utility model simultaneously provides an optical system with strong capability of resisting ambient light interference, which comprises a base 2, a coding disc 21, a photoelectric switch 3 and a driving plate 4, wherein a first mounting cavity corresponding to the mounting area of the driving plate 4 and a second mounting cavity corresponding to the mounting area of the driving motor are arranged at the upper part of the base 2, the photoelectric switch 3 is fixedly arranged on the lower surface of the driving plate 4, the driving plate 4 is rotatably arranged in the first mounting cavity of the base 2, the coding disc 21 is fixedly arranged in the first mounting cavity of the base 2, the coding discs 21 are distributed in a circular array, the coding discs 21 are positioned below the driving plate 4, the arrangement positions of the coding discs 21 are matched with the positions of the photoelectric switch 3, the outer cover 1 is fixedly connected to the upper part of the base 2, the outer cover 1 at least can cover the first mounting cavity, the upper end edge position of a shading structure is higher than the upper surface of the driving plate 4, and the lower end edge position of the shading structure is lower than the signal receiving surface of the coding disc 21. The lower end edge position of the shading structure can be flush with the lower end face of the outer cover 1 or not, so long as the set shading effect is achieved, and for the convenience of spraying or film coating processing, flush setting is generally adopted. The driving motor drives the driving plate 4 to rotate through the transmission mechanism, and the driving motor and the transmission mechanism are conventional technology and are irrelevant to the technical problem to be solved by the utility model, so the driving motor and the transmission mechanism are not shown in the figure.
In a preferred embodiment, the housing body includes a first region 11 corresponding to the mounting region of the driving plate 4 and a second region 12 corresponding to the mounting region of the driving motor, and the top plate upper surface of the second region 12 is lower than the upper surface of the driving plate 4, and the side wall of the first region 11, the side wall of the second region 12 and the top plate of the second region 12 are provided with light shielding structures.
In a preferred embodiment, the optoelectronic switch 3 comprises a transmitting end 31 and a receiving end 32, wherein the transmitting end 31 faces outwards and the receiving end 32 faces inwards, and the encoder disk 21 is arranged in the area between the transmitting end 31 and the receiving end 32.
In a preferred embodiment, the housing 1 and the base 2 are connected by a combination of a snap connection and a screw connection.
On the basis of adopting the technical scheme of the optical system, the utility model simultaneously provides the laser radar with strong capability of resisting the interference of the ambient light.
Referring to fig. 6, after the implementation of the present utility model, when external ambient light is incident on the lidar at different angles, the light shielding structure provided on the surface of the housing 1 can shield the external ambient light from the outside, so that the external ambient light cannot reach the receiving end 32 of the photoelectric switch 3 inside the lidar, thereby effectively preventing the ambient light from interfering with the lidar to obtain angle information.
Claims (8)
1. The dustcoat, including the dustcoat body that the lower extreme is open structure, dustcoat body lower extreme has the base connection structure who is used for connecting base (2), and the roof and the lateral wall of dustcoat body are high light transmission material, its characterized in that: the lower end surface of the side wall of the outer cover body is provided with a shading structure within a set height range, and the shading structure is a low-transmittance extinction paint coating, a low-transmittance reflecting film or a low-transmittance absorbing film.
2. The housing of claim 1, wherein: the housing body comprises a first area (11) corresponding to the installation area of the driving plate (4) and a second area (12) corresponding to the installation area of the driving motor, the top plate position of the second area (12) is lower than that of the first area (11), and the side wall of the first area (11), the side wall of the second area (12) and the top plate of the second area (12) are all provided with shading structures.
3. The housing of claim 1 or 2, wherein: the base connection structure is a combination of a buckle structure and a screw through hole.
4. The optical system comprises a base (2), a coding disc (21), a photoelectric switch (3) and a driving plate (4), wherein a first installation cavity corresponding to an installation area of the driving plate (4) and a second installation cavity corresponding to an installation area of the driving motor are arranged on the upper portion of the base (2), the photoelectric switch (3) is fixedly arranged on the lower surface of the driving plate (4), the driving plate (4) is rotatably arranged in the first installation cavity of the base (2), the coding disc (21) is fixedly arranged in the first installation cavity of the base (2), the coding disc (21) is distributed in a circular array, the coding disc (21) is located below the driving plate (4), and the setting position of the coding disc (21) is matched with the position of the photoelectric switch (3), and the optical system is characterized in that: the housing (1) as claimed in claim 1 is fixedly connected to the upper part of the base (2), the housing (1) can at least attach the first installation cavity cover inside, the upper end edge position of the shading structure is higher than the upper surface of the driving plate (4), and the lower end edge position of the shading structure is lower than the signal receiving surface of the coding disc (21).
5. The optical system of claim 4, wherein: the housing body comprises a first area (11) corresponding to the installation area of the driving plate (4) and a second area (12) corresponding to the installation area of the driving motor, the upper surface position of a top plate of the second area (12) is lower than the upper surface of the driving plate (4), and the side wall of the first area (11), the side wall of the second area (12) and the top plate of the second area (12) are all provided with shading structures.
6. The optical system of claim 4, wherein: the photoelectric switch (3) comprises a transmitting end (31) and a receiving end (32), wherein the transmitting end (31) faces outwards, the receiving end (32) faces inwards, and the coding disc (21) is arranged in an area between the transmitting end (31) and the receiving end (32).
7. An optical system as claimed in any one of claims 4 to 6, wherein: the outer cover (1) is connected with the base (2) through the combination of the buckle connecting structure and the screw connecting structure.
8. Laser radar, its characterized in that: lidar comprising an optical system according to any of claims 4 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320660690.8U CN219533394U (en) | 2023-03-30 | 2023-03-30 | Housing, optical system and laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320660690.8U CN219533394U (en) | 2023-03-30 | 2023-03-30 | Housing, optical system and laser radar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219533394U true CN219533394U (en) | 2023-08-15 |
Family
ID=87632701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320660690.8U Active CN219533394U (en) | 2023-03-30 | 2023-03-30 | Housing, optical system and laser radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219533394U (en) |
-
2023
- 2023-03-30 CN CN202320660690.8U patent/CN219533394U/en active Active
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| GR01 | Patent grant | ||
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