Movement shell suitable for laser radar
By setting a bleach ring and spraying a bleach paint layer in the transmission and reception channels of the lidar movement case, the problem of excessive stray light in the existing lidar movement case is solved, and the measurement accuracy and reliability are significantly improved.
Patent Information
- Application Number
- CN202421766636.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-25
AI Technical Summary
There is a large amount of stray light in the existing lidar movement case, which leads to reduced distance measurement accuracy and reliability, affects data quality, and may cause safety risks in high-precision application scenarios.
A lidar movement case including an upper cover, a lower cover, an upper mattress part and a lower mattress part is designed. By providing a plurality of mattress half rings in the transmission channel and the reception channel, and spraying a mattress paint layer on the mattress ring, the bottom end of the upper mattress and the top end of the lower mattress cover is to reduce the generation of stray light.
By adding an extinction ring and extinction paint layer, the diffusion light reflected from the inner walls of the emission channel and the receiving channel is effectively reduced, the source of stray light is reduced, and the measurement accuracy and reliability of the lidar are improved.
Smart Images
Figure CN222913864U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of radar devices, and particularly relates to a movement housing suitable for a lidar. Background Art
[0002] In the existing lidar structure design, the laser emitted by the diode is divergent. The peripheral light that is not optically utilized hits the inner wall of the movement and is reflected to generate stray light. These stray lights may be received by the receiving tube, resulting in the generation of incorrect data, affecting the ranging accuracy and reliability of the lidar. This situation will not only reduce the data quality of the lidar, but may also cause problems in some application scenarios with high requirements for data accuracy, such as the field of autonomous driving. Incorrect data may lead to incorrect judgments and decisions by the system, bringing potential safety risks. In addition, the existence of stray light will also reduce the effective detection range and resolution of the lidar to a certain extent, restricting the full play of its performance.
[0003] Therefore, how to design a lidar movement housing with a simple structure and capable of eliminating stray light is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model
[0004] The utility model provides a movement housing suitable for a lidar, which solves the technical problem that the detection accuracy of the existing lidar movement housing is reduced due to a large amount of stray light.
[0005] The technical solution for the utility model to solve the above technical problem is as follows: A movement housing suitable for a lidar includes a lower cover, an upper cover, an upper light extinction part and a lower light extinction part.
[0006] The bottom end of the upper cover is buckled on the top end of the upper cover, and two independently distributed emission channels and reception channels are defined inside the lower cover and the upper cover. The emission channels and the reception channels are both arranged along the front and rear end directions of the upper cover and the lower cover. The upper light extinction part includes a plurality of upper light extinction semi-rings. The plurality of upper light extinction semi-rings are arranged at intervals along the axial direction of the emission channel inside the emission channel and are arranged at intervals along the axial direction of the reception channel inside the reception channel. The plurality of upper light extinction semi-rings are respectively fixed to the bottom end of the corresponding upper cover. The lower light extinction part includes a plurality of lower light extinction semi-rings. The plurality of lower light extinction semi-rings are arranged at intervals along the axial direction of the emission channel inside the emission channel and are arranged at intervals along the axial direction of the reception channel inside the reception channel. The plurality of lower light extinction semi-rings are respectively fixed to the top end of the corresponding lower cover. The plurality of lower light extinction semi-rings are respectively arranged opposite to the plurality of upper light extinction semi-rings, and the corresponding lower light extinction semi-rings and upper light extinction semi-rings form a light extinction ring.
[0007] The beneficial effects of the present utility model are as follows: By adding anti-reflection rings in the transmitting channel and the receiving channel, it is possible to specifically reduce the stray light reflected from the inner walls of the transmitting channel and the receiving channel, greatly reducing the source of stray light generation and improving the accuracy and reliability of lidar measurement.
[0008] Based on the above technical solution, the present utility model can be further improved as follows.
[0009] Furthermore, the longitudinal cross-sections of the plurality of upper anti-reflection half-rings and the plurality of lower anti-reflection half-rings are all triangular structures, and the ends close to the center of the transmitting channel or the center of the receiving channel are all small-area ends.
[0010] Furthermore, it further includes an anti-reflection paint layer, and the anti-reflection paint layer is correspondingly coated on the plurality of upper anti-reflection half-rings, the plurality of lower anti-reflection half-rings, the bottom end of the upper machine cover, and the top end of the lower machine cover in the transmitting channel, and is correspondingly coated on the plurality of upper anti-reflection half-rings, the plurality of lower anti-reflection half-rings, the bottom end of the upper machine cover, and the top end of the lower machine cover in the receiving channel.
[0011] The beneficial effect of adopting the above is: By spraying an anti-reflection layer on the anti-reflection rings, the bottom end of the upper machine cover, and the bottom end of the lower machine cover, it is possible to suppress the formation and propagation of stray light, enabling more comprehensive control of stray light and improving the accuracy of lidar measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 is a three-dimensional structural schematic diagram of a core housing applicable to a lidar of the present utility model;
[0013] Figure 2 is a top three-dimensional structural schematic diagram of the lower machine cover in a core housing applicable to a lidar of the present utility model;
[0014] Figure 3 is a bottom three-dimensional structural schematic diagram of the upper machine cover in a core housing applicable to a lidar of the present utility model.
[0015] In the drawings, the list of components represented by each reference numeral is as follows:
[0016] 1. Upper machine cover, 2. Lower machine cover, 3. Upper anti-reflection half-ring, 4. Lower anti-reflection half-ring. SPECIFIC EMBODIMENTS
[0017] The principles and features of the present utility model will be described below with reference to the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.
[0018] As Figure 1 shown, a core housing applicable to a lidar includes a lower machine cover 2, an upper machine cover 1, an upper anti-reflection part, and a lower anti-reflection part.
[0019] The bottom end of the upper cover 1 is buckled to the top end of the lower cover 2, and two independently distributed transmitting channels and receiving channels are defined inside the lower cover 2 and the upper cover 1. Both the transmitting channel and the receiving channel are arranged along the front and rear end directions of the upper cover 1 and the lower cover 2.
[0020] The upper light extinction part includes a plurality of upper light extinction half-rings 3. The plurality of upper light extinction half-rings 3 are arranged at intervals along the axial direction of the transmitting channel in the transmitting channel and are arranged at intervals along the axial direction of the receiving channel in the receiving channel. The plurality of upper light extinction half-rings 3 are respectively fixed to the bottom end of the corresponding upper cover 1. The lower light extinction part includes a plurality of lower light extinction half-rings 4. The plurality of lower light extinction half-rings 4 are arranged at intervals along the axial direction of the transmitting channel in the transmitting channel and are arranged at intervals along the axial direction of the receiving channel in the receiving channel. The plurality of lower light extinction half-rings 4 are respectively fixed to the top end of the corresponding lower cover 2. The plurality of lower light extinction half-rings 4 are respectively arranged opposite to the plurality of upper light extinction half-rings 3, and the corresponding lower light extinction half-ring 4 and upper light extinction half-ring 3 form a light extinction ring.
[0021] In some specific embodiments, the longitudinal cross-sections of the plurality of upper light extinction half-rings 3 and the plurality of lower light extinction half-rings 4 can both be triangular structures, and the ends close to the center of the transmitting channel or close to the center of the receiving channel are small-area ends.
[0022] In some specific embodiments, it may further include a light extinction paint layer. The light extinction paint layer is correspondingly coated on the plurality of upper light extinction half-rings 3, the plurality of lower light extinction half-rings 4, the bottom end of the upper cover 1 and the top end of the lower cover 2 in the transmitting channel, and is correspondingly coated on the plurality of upper light extinction half-rings 3, the plurality of lower light extinction half-rings 4, the bottom end of the upper cover 1 and the top end of the lower cover 2 in the receiving channel.
[0023] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A core shell suitable for a laser radar, comprising a lower cover (2) and an upper cover (1), wherein the bottom end of the upper cover (1) is buckled onto the top end of the lower cover (2) and two independently distributed transmitting channels and receiving channels are defined inside the lower cover (2) and the upper cover (1), and the transmitting channel and the receiving channel are arranged along the front and rear end directions of the upper cover (1) and the lower cover (2); characterized in that: Also includes: An upper extinction portion, the upper extinction portion comprising a plurality of upper extinction semi-rings (3), the plurality of upper extinction semi-rings (3) being arranged in the transmitting channel at intervals along the axial direction of the transmitting channel and in the receiving channel at intervals along the axial direction of the receiving channel, the plurality of upper extinction semi-rings (3) being respectively fixed to the bottom ends of the corresponding upper machine covers (1); A lower extinction portion, the lower extinction portion comprising a plurality of lower extinction semi-rings (4), the plurality of lower extinction semi-rings (4) being arranged in the transmitting channel at intervals along the axial direction of the transmitting channel and in the receiving channel at intervals along the axial direction of the receiving channel, the plurality of lower extinction semi-rings (4) being respectively fixed on the top ends of the corresponding lower machine covers (2); the plurality of lower extinction semi-rings (4) being arranged opposite to the plurality of upper extinction semi-rings (3), and the corresponding lower extinction semi-rings (4) and the upper extinction semi-rings (3) forming an extinction ring.
2. A core housing suitable for laser radar according to claim 1, characterized in that: The longitudinal sections of the plurality of upper extinction semi-rings (3) and the plurality of lower extinction semi-rings (4) are all triangular structures, and the ends close to the center of the transmitting channel or close to the center of the receiving channel are all small-area ends.
3. A core housing suitable for laser radar according to claim 1, characterized in that: It also includes a matte paint layer, which is coated on the multiple upper matte half rings (3), the multiple lower matte half rings (4), the bottom end of the upper cover (1) and the top end of the lower cover (2) in the transmitting channel, and is coated on the multiple upper matte half rings (3), the multiple lower matte half rings (4), the bottom end of the upper cover (1) and the top end of the lower cover (2) in the receiving channel.