CN219758497U - Variable visual angle laser radar device - Google Patents
Variable visual angle laser radar device Download PDFInfo
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- CN219758497U CN219758497U CN202320357091.9U CN202320357091U CN219758497U CN 219758497 U CN219758497 U CN 219758497U CN 202320357091 U CN202320357091 U CN 202320357091U CN 219758497 U CN219758497 U CN 219758497U
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- 230000010287 polarization Effects 0.000 claims description 31
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Abstract
The utility model relates to a variable visual angle laser radar device, which comprises a light source, a light source and a control unit, wherein the light source is used for emitting laser; the two prisms are coaxially arranged, and both the two prisms rotate around the axis; the two prisms respectively comprise different numbers of reflecting surfaces, and the reflecting surfaces are used for receiving the laser and reflecting the laser to a field of view; the two prisms are configured to enable selection of one of the prisms to receive the laser light; according to the laser radar device, the number of the reflecting surfaces is inversely proportional to the scanning visual angle, a plurality of prisms and different numbers of reflecting surfaces are arranged, so that a plurality of scanning modes are provided, low-speed running and high-speed running of an automobile are respectively dealt with, the resolution and the view field angle are flexibly changed, and the reliability, the flexibility and the practicability of the radar device are remarkably improved.
Description
Technical Field
The utility model relates to the technical field of laser radars, in particular to a variable-visual-angle laser radar device.
Background
Lidar is a key technology in modern autopilot technology. In the existing laser radar technology, the coverage angles and the resolutions of the peripheral detection of different vehicle speeds and different road conditions are the same, so that the laser cannot be utilized efficiently. In practical application, the requirements of each use scene on the laser radar are different, for example, when an automobile runs at a low speed, the requirements on angle resolution are not high because of the special attention to objects with a large visual angle and a short distance; when the car is traveling at high speed, there is more interest in high resolution angular detection of obstacles in remote and relatively narrow viewing angles. In the existing lidar, there are few schemes involved in performing mutual optimization of long distance and short distance.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to solve the problem that the laser of the laser radar device in the prior art cannot be efficiently utilized, and further provide the variable-view laser radar device, so that the laser can be used more flexibly under the condition of realizing the same function as the laser radar device.
In order to solve the technical problems, the utility model provides a variable visual angle laser radar device which comprises a bracket.
And the light source is used for emitting laser.
The two prisms are coaxially arranged, and both the two prisms rotate around the axis; the two prisms respectively comprise different numbers of reflecting surfaces, and the reflecting surfaces are used for receiving the laser and reflecting the laser to a field of view; the two prisms are configured to enable selection of one of the prisms to receive the laser light.
In one embodiment of the utility model, the prism is connected to a movement mechanism configured to drive the prism to move such that one of the two prisms receives the laser light.
In one embodiment of the present utility model, the moving mechanism drives the prism to move in the axial direction.
In one embodiment of the utility model, the moving mechanism is connected to a first controller, and the first controller is used for starting and stopping the moving mechanism and adjusting the moving speed of the prism.
In one embodiment of the present utility model, the laser light source further includes a mirror for adjusting a propagation path of the laser light emitted from the light source and projecting the same onto the reflecting surface of the prism.
In one embodiment of the present utility model, the device further includes a polarization rotator, and the polarization rotator receives the laser light emitted from the light source, and adjusts the laser light into two orthogonal polarization states according to a control signal, and then emits the laser light.
In one embodiment of the present utility model, the laser light emitting device further comprises a polarization beam splitter, wherein the polarization beam splitter receives the laser light emitted by the polarization rotator and emits the laser light in two different directions.
In one embodiment of the present utility model, the laser beam processing device further includes a first mirror, a second mirror, and a third mirror, wherein the first mirror, the second mirror, and the third mirror are used for adjusting a propagation path of the laser beam emitted from the polarization beam splitter and projecting the same onto the reflecting surface.
In one embodiment of the utility model, the prism comprises a first prism provided with eight reflecting surfaces and a second prism provided with four reflecting surfaces.
In one embodiment of the utility model, the first prism and the second prism are driven to rotate around the axis by a rotating device.
Compared with the prior art, the technical scheme of the utility model has the following advantages:
the utility model relates to a variable visual angle laser radar device, which comprises a light source, a light source and a light source, wherein the light source is used for emitting laser; the two prisms are coaxially arranged, and both the two prisms rotate around the axis; the two prisms respectively comprise different numbers of reflecting surfaces, and the reflecting surfaces are used for receiving the laser and reflecting the laser to a field of view; the two prisms are configured to enable selection of one of the prisms to receive the laser light; the number of the reflecting surfaces is inversely proportional to the scanning visual angle, and a plurality of prisms and reflecting surfaces with different numbers are arranged, so that various modes with different scanning angles are provided, low-speed running and high-speed running of the automobile can be respectively dealt with, resolution and view field angle can be flexibly changed, and the reliability, flexibility and practicability of the radar device are remarkably improved.
Drawings
In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings, in which
Fig. 1 is a schematic view showing a structure of a lidar device according to a first preferred embodiment of the present utility model.
Fig. 2 is a schematic structural diagram of a lidar device according to a second preferred embodiment of the present utility model.
Fig. 3 is a schematic view of a prism of the laser radar apparatus shown in fig. 1.
Description of the specification reference numerals: 1. a first prism; 2. a bracket; 3. a second prism; 4. a mobile device; 5. a polarization rotator; 6. a polarizing beam splitter; 7. a light source; 8. a control signal; 9. a first mirror; 10. a first light beam; 11. a second mirror; 12. a third mirror; 13. a reflecting surface; 14. a second light beam; 15. a reflecting mirror; 17 a first controller.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific examples, which are not intended to be limiting, so that those skilled in the art will better understand the utility model and practice it.
Example 1
In one embodiment of the present utility model, referring to fig. 1 and 2, a variable view lidar device of the present utility model includes a metal bracket 2 provided in a rod-like structure; the metal bracket 2 has stable structure and good strength.
In one embodiment of the present utility model, referring to fig. 1 and 2, a light source 7 is shown, the light source 7 is used for emitting laser, and the laser is linearly polarized light, and the polarization state can be adjusted; the laser is used for scanning a view field, and when the laser irradiates on the surface of an object, the laser is reflected in an original way; the field of view refers to the area detected by the radar device for safe driving of the vehicle.
In one embodiment of the present utility model, referring to fig. 1, 2 and 3, the first prism 1 and the second prism 3 are provided in a prismatic table structure, the first prism 1 and the second prism 3 are coaxially provided on the bracket 2, and the prisms are used for projecting laser emitted by the light source 7 to a field of view; the prism rotates and is arranged upside down; the purpose of the rotation setting is to continuously adjust the incident angle of the laser and reflect the laser in different directions; the prism is provided with a plurality of reflecting surfaces 13, the reflecting surfaces 13 are arranged on the side surfaces of the prismatic table structure, and the surfaces of the reflecting surfaces 13 are smooth; the laser irradiates on the reflecting surface 13 of the prism at a fixed angle and is reflected; when the prisms rotate, the reflection surfaces 13 are respectively and sequentially irradiated by the laser to generate total reflection, the reflection surfaces 13 scan the laser to form a field of view, the number of the reflection surfaces 13 of the two prisms is different, and the corresponding areas are different; the magnitude of the scanning angle of the laser light is inversely proportional to the number of reflecting surfaces 13.
In one embodiment of the present utility model, referring to fig. 1, the prism is connected with a moving mechanism, and the moving mechanism comprises a motor, a screw rod, a gear and a fixed seat; the moving mechanism is configured to drive the first prism 1 and the second prism 3 to move so that one of the two prisms reaches an irradiation area of laser light and receives the laser light to switch back and forth in a mode in which the two scanning angles are different in the radar apparatus.
In one embodiment of the present utility model, referring to fig. 1, the moving mechanism drives the first prism 1 and the second prism 3 to move along the axis direction, and the two prisms are in a vertical positional relationship, so that the laser light sequentially irradiates the reflecting surfaces 13 of the two prisms with the incident angle of the laser light unchanged.
In one embodiment of the present utility model, referring to fig. 1, the moving mechanism is connected to a first controller 17 through a line, the first controller 17 includes a computer logic program, and the first controller 17 is used to start and stop the moving mechanism and to adjust the moving speeds of the first prism 1 and the second prism 3 so that the radar apparatus switches the scanning mode in different driving environments.
In one embodiment of the present utility model, as shown with reference to fig. 1, the laser light source device further includes a reflecting mirror 15, where the reflecting mirror 15 is used to adjust the propagation path of the laser light emitted from the light source 7 and projects the laser light onto the reflecting surface 13 of the prism.
In one embodiment of the utility model, referring to fig. 1, the prism comprises a first prism 1 provided with eight reflecting surfaces 13 and a second prism 3 provided with four reflecting surfaces 13, the area of the reflecting surface 13 of the first prism 1 being smaller than the area of the reflecting surface 13 of the second prism 3.
Example two
In one embodiment of the present utility model, referring to fig. 1, the device further comprises a polarization rotator 5, wherein the polarization rotator 5 receives the laser light emitted by the light source 7, and adjusts the laser light into two orthogonal polarization states according to the control signal 8, and then emits the two orthogonal polarization states; the light source 7 generally propagates towards the periphery during propagation and presents a plurality of polarization states; the laser passing through the polarization rotator 5 only maintains two polarization states, so that the interference of redundant polarization states is reduced.
In one embodiment of the present utility model, as shown with reference to fig. 1, further comprises a polarizing beam splitter 6 provided with a plurality of light-passing ports; the polarization beam splitter 6 receives the laser light from the polarization rotator 5 and emits the laser light in two different directions.
In one embodiment of the present utility model, as shown in fig. 1, the device further comprises a first mirror 9, a second mirror 11 and a third mirror 12 with identical structures, wherein the first mirror 9, the second mirror 11 and the third mirror 12 are used for adjusting the propagation paths of the two paths of the laser light emitted by the polarization beam splitter 6, and independently projecting the paths to the reflecting surfaces 13 of the two prisms.
In one embodiment of the present utility model, referring to fig. 1, the first reflecting surface 13 of the first prism 1 and the second reflecting surface 13 of the second prism 3 have the same inclination angle, and when the first prism 1 and the second prism 3 are irradiated with the same incident angle, the outgoing angle of the laser light reflected by the first reflecting surface 13 and the second reflecting surface 13 is identical.
In one embodiment of the present utility model, referring to fig. 1, the laser projection device further comprises a rotating device, the rotating device comprises a motor, a gear, a rotating shaft, etc., one end of the rotating shaft is connected with the motor, the other end of the rotating shaft is connected with the first prism 1 and the second prism 2 through gear matching, the rotating device drives the first prism 1 and the second prism 2 to rotate around the axes, and the reflection angle of the laser on the reflection surface 13 is continuously changed, so that the laser projection of fields of view with different angles is realized.
The working principle of the variable visual angle laser radar device provided by the utility model is as follows:
in the first embodiment of the radar device, the polarization rotator 5 deflects the polarization direction of the laser light emitted by the light source 7 by ninety degrees, the polarization beam splitter 6 receives the laser light emitted by the polarization rotator 5 and then cooperates with the polarization rotator 5 to selectively emit the laser light along two different paths, the laser light emitted by the polarization beam splitter 6 is reflected by the plurality of reflectors 15 and then respectively emits on the first reflecting surface 13 of the first prism 1 and the second reflecting surface 13 of the second prism 3 to generate reflection and scan the field of view, thus the radar device has two scanning modes, and the radar device can scan the field of view at a plurality of angles by keeping the first prism 1 and the second prism 3 in a rotating state and dynamically changing the positions of the first reflecting surface 13 and the second reflecting surface 13; in the second embodiment, the radar device changes the positions of the first prism 1 and the second prism 3 through the moving device 4, so that laser irradiates on the first prism 1 and the second prism 3 sequentially through the reflecting mirror 15 to generate two scanning modes, and the positions of the first reflecting surface 13 and the second reflecting surface 13 are dynamically changed, so that the laser can scan the field of view at a plurality of angles; the areas of the first reflecting surface 13 and the second reflecting surface 13 are different, the laser light reflected by the first reflecting surface 13 and the second reflecting surface 13 have angles with different magnitudes, the scanning angle of the laser light is proportional to the area of the reflecting surface 13, and the area of the first reflecting surface 13 is smaller than that of the second reflecting surface 13, so that the laser light passing through the first reflecting surface 13 has a smaller scanning angle; when the radar device scans a field of view at a short distance, under the control of the control signal, the laser light of the light source 7 irradiates on the second reflecting surface 13; when the radar device scans a long-distance field of view, the laser light of the light source 7 irradiates the first reflecting surface 13.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations and modifications of the present utility model will be apparent to those of ordinary skill in the art in light of the foregoing description. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.
Claims (10)
1. A variable view angle laser radar apparatus, characterized by comprising,
a light source for emitting laser light;
the two prisms are coaxially arranged, and both the two prisms rotate around the axis; the two prisms respectively comprise different numbers of reflecting surfaces, and the reflecting surfaces are used for receiving the laser and reflecting the laser to a field of view; the two prisms are configured to enable selection of one of the prisms to receive the laser light.
2. The variable view lidar device according to claim 1, wherein the prism is connected to a moving mechanism configured to drive the prism to move such that one of the two prisms receives the laser light.
3. The variable view lidar device according to claim 2, wherein the movement mechanism drives the prism to move in the axial direction.
4. A variable view lidar device according to claim 3, wherein the movement mechanism is connected to a first controller, and the first controller is configured to start and stop the movement mechanism and to adjust the movement speed of the prism.
5. The variable view lidar device according to claim 4, further comprising a reflecting mirror for adjusting a propagation path of the laser light emitted from the light source and projecting the same onto the reflecting surface of the prism.
6. The variable view lidar device according to claim 1, further comprising a polarization rotator that receives the laser light emitted from the light source, and adjusts the laser light to two polarization states orthogonal to each other according to a control signal, respectively, and emits the laser light.
7. The variable view lidar device according to claim 6, further comprising a polarization beam splitter that receives the laser light emitted from the polarization rotator and emits the laser light in two different directions, respectively, according to the polarization state of the laser light.
8. The variable view lidar device according to claim 7, further comprising a first mirror, a second mirror, and a third mirror, wherein the first mirror, the second mirror, and the third mirror are configured to adjust a propagation path of the laser light emitted from the polarizing beam splitter and to project the laser light onto the reflecting surface.
9. The variable view lidar device according to claim 1, wherein the prism includes a first prism provided with eight reflection surfaces and a second prism provided with four reflection surfaces.
10. The variable view lidar device of claim 9, further comprising a rotation device that drives the first prism and the second prism to rotate about the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320357091.9U CN219758497U (en) | 2023-03-01 | 2023-03-01 | Variable visual angle laser radar device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320357091.9U CN219758497U (en) | 2023-03-01 | 2023-03-01 | Variable visual angle laser radar device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219758497U true CN219758497U (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320357091.9U Active CN219758497U (en) | 2023-03-01 | 2023-03-01 | Variable visual angle laser radar device |
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| Country | Link |
|---|---|
| CN (1) | CN219758497U (en) |
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2023
- 2023-03-01 CN CN202320357091.9U patent/CN219758497U/en active Active
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