Radar antifouling structure

Abstract

The utility model belongs to the technical field of radar protection structures, and particularly relates to a radar antifouling structure, which comprises a protection cover, an anti-fouling layer and an anti-fouling layer, the shading cylinder is connected to the protective cover, and the axis direction of the shading cylinder is parallel to the first direction; the two groups of light guide plates are arranged in parallel in the first direction, and the distance between the two groups of light guide plates forms a light channel; the glass substrate is obliquely arranged and connected to the radar and the shading cylinder, and the size of the glass substrate is set to be capable of covering the optical channel; the light guide pipe is in an L shape and comprises an emergent section extending in the second direction and an extension section extending in the first direction, the extension section is connected to the shading cylinder, and the first direction is perpendicular to the second direction; and the rotary reflective mirror is obliquely arranged at the outer side corner of the emergent section and the extension section. Therefore, the problems that in the prior art, a plastic outer cover of the radar is difficult to protect, and the influence of the glass periphery on radar ranging is difficult to avoid are solved.

Description

Technical Field

[0001] This utility model belongs to the field of radar protection structure technology, specifically relating to a radar anti-fouling structure. Background Technology

[0002] As an advanced detection technology, lidar's core advantage lies in using laser beams to achieve high-precision measurement of target position, velocity, and other characteristic quantities. Especially in the field of intelligent manufacturing, lidar, with its superior environmental perception capabilities, has become an indispensable part of automated processes.

[0003] However, current single-line lidar designs typically use PC plastic as the optical housing, a choice primarily driven by cost and structural design considerations. While PC plastic offers a degree of durability, its resilience is significantly limited in harsh environments such as high temperatures, high humidity, corrosive gases, or dusty conditions. These environmental factors can cause the plastic housing to age, deform, or become damaged, thereby affecting the lidar's performance and lifespan.

[0004] To address the aforementioned issues, a common practice is to add a glass enclosure in front of the lidar. Glass, compared to plastic, offers higher hardness and corrosion resistance, effectively preventing dirt and corrosive substances from the external environment from eroding the lidar. However, the introduction of the glass enclosure also introduces new problems. As a medium for electromagnetic wave propagation, glass's presence can affect the electromagnetic waves emitted and received by the lidar. Particularly when the distance between the glass enclosure and the lidar is too small, the lidar may misdetect the glass enclosure itself, leading to instability in the measured point cloud. This instability not only affects the accuracy of the radar's measurement of the target object but may also cause misjudgments by the radar system, thereby reducing the overall quality of the point cloud imaging.

[0005] Therefore, given that existing technologies struggle to protect radar with plastic covers and that glass covers can negatively impact radar ranging, a more reasonable technical solution is needed to address these issues. Utility Model Content

[0006] The purpose of this invention is to provide a radar anti-fouling structure to solve the problems in the prior art where it is difficult to protect the radar with plastic covers and it is difficult to avoid the influence of the outer glass periphery on radar ranging.

[0007] To achieve the above objectives, this utility model provides a radar anti-fouling structure, comprising:

[0008] A protective shield is mounted on the radar.

[0009] A light-shielding tube is connected to the protective cover, and the axial direction of the light-shielding tube is parallel to the first direction;

[0010] The light guide plates are arranged in two groups and are arranged in parallel along the first direction, and the distance between the two groups of light guide plates is formed as a light channel;

[0011] The glass substrate is arranged obliquely and is connected to the radar and the light shielding cylinder, and the glass substrate is sized to cover the light channel;

[0012] The light guide pipe is in the shape of L and includes an emitting section extending along a second direction and an extension section extending along a first direction, the extension section is connected to the light shielding cylinder, and the first direction is perpendicular to the second direction; and

[0013] The rotating reflector is arranged obliquely at the outer corner of the emitting section and the extension section.

[0014] In a possible design, the light shielding cylinder is provided with a limiting groove, and the outer periphery of the extension section is provided with a limiting platform matched with the limiting groove, and the extension section is clamped in the light shielding cylinder.

[0015] In a possible design, the rotating reflector is parallel to the glass substrate.

[0016] In a possible design, the rotating reflector is sized to cover at least the route of the reflected signal.

[0017] According to the above technical solution, the protective cover is arranged on the radar, which can protect the radar body and prevent direct impact and pollution from the external environment. The light shielding cylinder is connected to the protective cover, and the inner hole of the light shielding cylinder is formed as a light channel. The axis direction of the light shielding cylinder is parallel to the first direction, which helps to guide the light beam and reduce the interference of stray light. The glass substrate is arranged obliquely and is connected to the radar and the light shielding cylinder. The glass substrate is sized to cover the light channel, which not only ensures the smooth passing of the light beam but also facilitates cleaning and observation. The light guide pipe guides the light beam from the rotating reflector to the outside of the protective cover and reduces the loss of the light beam during propagation. The rotating reflector reflects the light beam so that it can pass through the light guide pipe and be transmitted through the protective cover. At the same time, when the light beam returns, the rotating reflector reflects it to the sensor again.

[0018] When the glass substrate is dirty, part of the light beam will be reflected back. At this time, the light channel and the extension section of the light shielding cylinder form a closed interval, which intercepts the light beam returned by the glass dirt, so as not to affect the normal detection of the radar, which not only protects the protective cover of the radar but also effectively avoids the influence of the protective cover on the radar ranging. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Fig. 1 is a schematic diagram of the three-dimensional structure of the radar anti-fouling structure in an embodiment of the present application;

[0021] Fig. 2 is a schematic diagram of the structure of the radar anti-fouling structure in an embodiment of the present application, wherein the direction indicated by the arrow is the emission and reflection path of the light beam (laser);

[0022] Fig. 3 is a schematic diagram of part of the structure of the radar anti-fouling structure in an embodiment of the present application, wherein the direction indicated by the arrow is the emission and reflection path of the light beam (laser).

[0023] In the above drawings: 1-radar, 2-protective cover, 3-shading cylinder, 4-light guide plate, 41-light channel, 5-glass substrate, 6-light guide tube, 61-emission section, 62-outer extension section, 7-rotary mirror, 8-measured object. DETAILED DESCRIPTION

[0024] The present application will be further described below in conjunction with the drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation of the present application. The specific structural and functional details disclosed herein are only used to describe the embodiments of the present application. However, the present application can be embodied in many alternative forms, and should not be understood as being limited in the embodiments described herein.

[0025] According to the first aspect of the present application, a radar anti-fouling structure is provided. Wherein, Figs. 1 to 3 One of the specific embodiments is shown.

[0026] Referring to Figs. 1 to 3As shown, the radar 1 anti-fouling structure comprises: a protective cover 2, which is arranged on the radar 1; a light shielding cylinder 3, which is connected to the protective cover 2, and the axis direction of the light shielding cylinder 3 is parallel to the first direction; two groups of light guide plates 4, which are arranged in parallel along the first direction, and the distance between the two groups of light guide plates 4 forms a light channel 41; a glass substrate 5, which is arranged obliquely and is connected to the radar 1 and the light shielding cylinder 3, and the size of the glass substrate 5 is arranged to be able to cover the light channel 41; a light guide pipe 6, which is in the shape of L and comprises an emitting section 61 extending along the second direction and an extension section 62 extending along the first direction, the extension section 62 is connected to the light shielding cylinder 3, and the first direction is perpendicular to the second direction; and a rotating reflector 7, which is arranged obliquely at the outer side corner of the emitting section 61 and the extension section 62.

[0027] As shown in Fig. 2 and Fig. 3 As shown, the light beam is reflected after reaching the rotating reflector 7, passes through the protective cover 2 through the light guide pipe 6 and is irradiated out. Then, the light beam passes through the glass substrate 5 through the light channel 41 and reaches the measured object 8, and then returns to the sensor after passing through the glass substrate 5 and the protective cover 2 of the radar 1 and being reflected by the rotating reflector 7. If there is dirt on the glass substrate 5, part of the light beam will be reflected back. At this time, the light channel 41 and the extension section 62 of the light shielding cylinder 3 can form a closed interval to intercept the light beam returned by the glass dirt, without affecting the normal detection of the radar 1. In this way, the protective cover 2 of the radar 1 can be protected, and the influence of the protective cover 2 on the ranging of the radar 1 can be effectively avoided.

[0028] Through the above technical solution, the protective cover 2 is arranged on the radar 1, which can protect the radar 1 body and prevent direct impact and pollution from the external environment. The light shielding cylinder 3 is connected to the protective cover 2, and the inner hole of the light shielding cylinder 3 forms a light channel 41. The axis direction of the light shielding cylinder 3 is parallel to the first direction, which helps to guide the light beam and reduce the interference of stray light. The glass substrate 5 is arranged obliquely and is connected to the radar 1 and the light shielding cylinder 3. The size of the glass substrate 5 is arranged to be able to cover the light channel 41, which not only ensures the smooth passage of the light beam, but also facilitates cleaning and observation. The light guide pipe 6 functions to guide the light beam from the rotating reflector 7 to the outside of the protective cover 2, while reducing the loss of the light beam in the propagation process. The rotating reflector 7 can reflect the light beam so that it can pass through the light guide pipe 6 and be irradiated out through the protective cover 2. At the same time, when the light beam returns, the rotating reflector 7 reflects it to the sensor again.

[0029] When there is dirt on the glass substrate 5, part of the light beam will be reflected back. At this time, the light channel 41 and the extension section 62 of the light shielding cylinder 3 form a closed interval to intercept the light beam returned by the glass dirt, so as not to affect the normal detection of the radar 1. In this way, the protective cover 2 of the radar 1 can be protected, and the influence of the protective cover 2 on the ranging of the radar 1 can be effectively avoided.

[0030] In an embodiment provided in the present disclosure, the light shielding cylinder 3 is provided with a limiting groove, and the outer circumferential surface of the outer extension segment 62 is provided with a limiting platform matched with the limiting groove, and the outer extension segment 62 is clamped in the light shielding cylinder 3. The limiting groove is arranged in the light shielding ring and can be used to fix and position other components. The limiting platform is a protruding part, and its shape and size are matched with the limiting groove. Through the cooperation of the limiting groove and the limiting platform, the outer extension segment 62 can be clamped in the light shielding ring, thereby ensuring the stable connection between the light guide pipe 6 and the light shielding ring, and facilitating the installation and disassembly.

[0031] Based on the clamping arrangement of the limiting groove and the limiting platform, the accurate alignment between the light guide pipe 6 and the light shielding ring can be ensured, thereby ensuring the accurate transmission of the light beam. Secondly, this connection mode enhances the stability of the structure, reduces the risk of loosening or falling off of the components due to vibration or external force impact, simplifies the installation and disassembly process, and improves the maintenance efficiency.

[0032] In addition, the light shielding cylinder 3 and the outer extension segment 62 can be relatively fixed by a threaded structure or an interference fit. Those skilled in the art can make flexible arrangements under the technical concept of the present disclosure.

[0033] In an embodiment provided in the present disclosure, the rotating mirror 7 is parallel to the glass substrate 5. In this way, the reflecting surface of the rotating mirror 7 and the surface of the glass substrate 5 are in the same plane or very close, thereby ensuring the accurate reflection and transmission of the light beam between them. Since the rotating mirror 7 is parallel to the glass substrate 5, the light beam emitted from the radar 1 can accurately reflect onto the rotating mirror 7 after passing through the glass substrate 5. Similarly, the light beam reflected back from the measured object 8 can accurately pass through the glass substrate 5 and return to the radar 1 after being reflected by the rotating mirror 7.

[0034] Based on the parallel arrangement of the rotating mirror 7 and the glass substrate 5, the transmission efficiency of the light beam is improved, and the loss of the light beam due to the deviation of the reflection angle is reduced. Secondly, the design of the light beam path can be simplified, and the entire laser radar 1 system is more compact and efficient. Finally, it also helps to reduce the interference of stray light, improves the ranging accuracy and stability of the radar 1, and is particularly suitable for laser radar 1 systems that require high-precision ranging and three-dimensional modeling. For example, in the fields of autonomous driving cars, robot navigation, and terrain mapping, the radar 1 system can work accurately and stably in various complex environments.

[0035] In the present disclosure, the size of the rotating mirror 7 is arranged to at least cover the route of the reflected signal, thereby ensuring that it can cover the entire path of the light beam emitted from the radar 1 after passing through the glass substrate 5 and reflecting onto the rotating mirror 7, and the entire path of the light beam reflected back from the measured object 8 after reflecting through the glass substrate 5 and returning to the radar 1 after reflecting through the rotating mirror 7.

[0036] The route of the reflected signal refers to the complete path of the light beam transmitted between the radar 1, the glass substrate 5, the rotating reflector 7, and the measured object 8. By ensuring that the size of the rotating reflector 7 is at least capable of covering the route of the reflected signal, it can be ensured that the light beam can accurately irradiate the measured object 8 and return to the radar 1. In addition, it can also improve the reflection efficiency of the light beam and reduce the loss of the light beam due to insufficient reflection area. Secondly, it ensures that the radar 1 can receive the complete reflected signal, thereby improving the accuracy and stability of the ranging. Finally, it helps to reduce the interference of stray light and improve the overall performance of the radar 1 system.

[0037] It should be noted that when designing the size of the rotating reflector 7, multiple factors need to be considered, including the transmission power of the radar 1, the divergence angle of the light beam, the transmittance of the glass substrate 5, the distance and reflectivity of the measured object 8, etc. The size of the rotating reflector 7 can not only meet the coverage requirements of the reflected signal route, but also maintain a compact and efficient structure.

[0038] Finally, it should be noted that the utility model is not limited to the above-mentioned optional embodiments, and anyone can derive other various forms of products under the inspiration of the utility model. The above-mentioned specific embodiments should not be understood as limiting the protection scope of the utility model, and the protection scope of the utility model should be defined by the claims, and the specification can be used to explain the claims.

Claims

1. A radar anti-fouling structure, characterized by, The application relates to a radar protection device, comprising: a protection cover arranged on a radar; a light shielding cylinder connected to the protection cover, the axis direction of the light shielding cylinder being parallel to a first direction; two groups of light guide plates arranged in parallel along the first direction, the distance between the two groups of light guide plates being formed as a light channel; a glass substrate arranged obliquely and connected to the radar and the light shielding cylinder, the glass substrate being sized to cover the light channel; a light guide tube in the shape of L, comprising an emitting section extending along a second direction and an extension section extending along the first direction, the extension section being connected to the light shielding cylinder, and the first direction being perpendicular to the second direction; and a rotating reflector arranged obliquely at the outer corner between the emitting section and the extension section.

2. The radar anti-soiling structure of claim 1, wherein, A limiting groove is arranged in the light shielding cylinder, and the outer periphery of the extension section is provided with a limiting platform matched with the limiting groove, and the extension section is clamped in the light shielding cylinder.

3. The radar anti-soiling structure of claim 1, wherein, The rotating reflector is parallel to the glass substrate.

4. The radar anti-soiling structure of claim 1, wherein, The rotating reflector is sized to cover at least the route of reflected signals.

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