Shading assembly, detection device and terminal

Abstract

A shading assembly (100), a detection device and a terminal are applied to the technical field of optical devices and detection. The shading assembly (100) comprises a first shading plate (10), the first shading plate (10) is provided with a protruding barrier column (102) and a plurality of protruding sawteeth (101), and the vertical height of the barrier column (102) is larger than that of the sawteeth (101). By arranging the sawteeth (101) and the barrier columns (102), the interference of stray light on detection can be reduced. When the shading assembly (100) is arranged outside the window of the detection device, the interference of stray light formed by external elements on detection can be reduced, and the possibility of false detection of echo signals by the detection device can be significantly reduced, thereby improving the accuracy of distance measurement and improving the detection performance.

Description

A light-shielding component, a detection device, and a terminal Technical Field

[0001] The present application relates to the fields of optical devices and detection technology, and in particular to a light-shielding component, a detection device and a terminal. Background Art

[0002] With the development of information technology and computer vision, detection technology has made rapid progress. Various detection devices have brought great convenience to people's lives and travel. Detection devices can be thought of as the "eyes" that perceive the environment. They include visual sensors such as cameras and radar sensors such as millimeter-wave radar, laser radar, and ultrasonic radar. Among them, laser radar (light detection and ranging) technology has obvious advantages in detection range, ranging accuracy, and reliability, and has the characteristics of near-all-weather operation. It is a key sensor in the field of perception and plays an important role in intelligent driving, intelligent transportation, surveying and mapping, intelligent manufacturing and other fields. The principle of laser radar detection is to emit detection signal light and receive echo signals from targets in the field of view to obtain relevant information about the target.

[0003] Mainstream LiDARs are typically installed externally, such as on the vehicle or logistics robot. This prevents reflections from the windshield and improves optical performance. Externally mounted LiDARs can accelerate aging, shortening their service life. They can also affect the vehicle's wind resistance and aesthetics.

[0004] If the LiDAR is built into the windshield, its aging rate can be significantly slowed. However, the large surface area of ​​the windshield typically precludes the use of precision optical components. Furthermore, the windshield's exposed surface often suffers from minor wear and tear, as well as dust accumulation. These factors result in the windshield's inherent low transmittance, high reflectivity, and high scattering properties. This reflects the LiDAR's detection signal light, introducing a significant amount of stray light that interferes with the radar and affects its ranging accuracy.

[0005] Summary of the Invention

[0006] The embodiments of the present application provide a shading component, a detection device, and a terminal, which can reduce the interference of stray light on detection, improve the ranging accuracy of the detection device, and improve the detection performance.

[0007] In a first aspect, an embodiment of the present application provides a light shielding assembly, comprising:

[0008] The first light shielding plate is provided with a protruding barrier column and a plurality of protruding saw teeth, and the vertical height of the barrier column is higher than the plurality of saw teeth.

[0009] In the embodiments of the present application, the multiple sawtooth sections provided on the first light shielding plate allow stray light to be absorbed or dispersed upon reaching the multiple sawtooth sections of the first light shielding plate. Even if stray light is not absorbed upon first reaching a sawtooth, it is highly likely to be reflected again between the sawtooth sections and onto another sawtooth, thereby gradually reducing the energy intensity of the stray light. Therefore, providing multiple sawtooth sections on the light shielding plate can significantly reduce the interference of stray light on detection.

[0010] On the other hand, by using an obstacle column that is higher than the saw teeth, stray light that is not consumed by the saw teeth (such as stray light propagating along the surface of the first light shielding plate) can be blocked by the obstacle column, further reducing the interference of stray light on detection.

[0011] Optionally, the shading component can be positioned outside the viewing window of the detection device. Since the detection device measures distance by detecting echo signals, reducing the interference of stray light generated by external components on detection can significantly reduce the possibility of the detection device falsely detecting echo signals, thereby improving the accuracy of distance measurement and enhancing detection performance.

[0012] Furthermore, this approach improves the detection device's ability to resist interference from stray light, allowing it to be installed inside external components (such as inside a vehicle cabin or a robot), shielding it from external heat, rain, and weathering. This not only extends the LiDAR's service life but also allows for greater flexibility in its installation location, enhancing the user experience.

[0013] In another possible implementation of the first aspect, the surface of the obstacle column is made of a low-reflectivity material.

[0014] Low-reflectivity materials have a weaker reflective effect on light. Therefore, when stray light reaches the light shield, the low-reflectivity material can reduce the possibility of stray light being reflected and reduce the interference of stray light on detection.

[0015] For example, the surface of the barrier column is made of a first material, and the reflectivity of the first material is lower than a first threshold value. Exemplarily, the first threshold value is 40%, or 30%, or 20%, or 10%, or 5%, or 2%, or 1%.

[0016] Optionally, the reflectivity here may be the reflectivity at a preset temperature (usually room temperature, such as about 25 degrees Celsius, or standard conditions, 0 degrees Celsius).

[0017] In another possible implementation of the first aspect, the surfaces of the plurality of saw teeth are made of a low-reflectivity material. Exemplarily, the surfaces of the plurality of saw teeth are made of a second material, and the reflectivity of the second material is lower than a second threshold. For example, the second threshold is 40%, 30%, 20%, 10%, 5%, 2%, or 1%.

[0018] In a possible implementation manner of the first aspect, the surface of the first shading plate (for example, the surface on which the obstacle columns and the serrations are provided) is made of a low-reflectivity material.

[0019] Optionally, the surface of the first light shielding plate is made of a third material, and the reflectivity of the third material is lower than a third threshold value. Exemplarily, the first threshold value is 40%, or 30%, or 20%, or 10%, or 5%, or 2%, or 1%.

[0020] Optionally, the first material, the second material, and the third material may be the same material, or different materials. The first threshold, the second threshold, and the third threshold may be the same or different.

[0021] In yet another possible implementation manner of the first aspect, each of the plurality of saw teeth is inclined toward one side of the obstacle column.

[0022] In this embodiment, when the plurality of saw teeth are tilted, the saw tooth tips become sharper, thereby reducing the energy of stray light.

[0023] When the saw teeth are tilted toward the obstacle column, stray light is more likely to be incident on the side of the saw teeth away from the obstacle column. Even if it is not absorbed and / or consumed, it can be reflected toward the side away from the obstacle column.

[0024] At this time, setting the obstacle column between the sawtooth and the window of the detection device can enable the sawtooth and the obstacle column to consume stray light that may enter the window of the detection device, reduce the possibility of stray light entering the detection device, and thus reduce the interference caused by stray light.

[0025] In another possible implementation manner of the first aspect, the shading assembly is disposed outside a viewing window of the detection device; and the obstacle column is located between the viewing window and the plurality of saw teeth.

[0026] In the above embodiment, the shading component is arranged outside the window of the detection device, which can reduce the interference of stray light from external components on detection and significantly reduce the possibility of the detection device falsely detecting echo signals, thereby improving the accuracy of ranging and improving detection performance.

[0027] The barrier column is set between the window and the multiple saw teeth, which can block the stray light propagating toward the window (meaning absorbing or reflecting it in a direction away from the window), thereby further reducing the stray light entering the window and reducing interference.

[0028] In addition, the residual light in the detection signal light from the window that exceeds the edge of the field of view angle may also interfere with the detection device. The obstacle column can also block the stray light from the direction of the window, further reducing interference.

[0029] In another possible implementation of the first aspect, the shading component is located between the viewing window and the first transparent surface, and each of the plurality of saw teeth includes a first side and a second side, the first side is close to the viewing window, and the second side is away from the viewing window;

[0030] The angle between the second side and the horizontal direction is related to the angle between the first transparent surface and the horizontal direction and the field of view of the detection device in the vertical direction.

[0031] The first transparent surface may be the surface of a transparent housing of a device housing the detection device. For example, if the detection device is located in a cockpit, the first transparent surface may be the surface of a windshield. For another example, if the detection device is located in the chest cavity of a robot, the first transparent surface may be the surface of a transparent housing on the robot's chest.

[0032] In the above embodiment, when the inclination angle of the second side of the sawtooth is close to parallel to the stray light reflected from the transparent surface to the sawtooth, the stray light can be more accurately transmitted to the gap between the two sawtooths, thereby improving the effect of the sawtooth in consuming signal light and improving the shading efficiency.

[0033] Optionally, the angle γ between the second side and the horizontal direction satisfies the following formula:

[0034] Where x is close to 0. Where γ is the angle between the second side and the horizontal direction, α is the field of view angle of the detection device, is the angle between the first transparent surface and the horizontal direction, and x is the angle between γ and The absolute value of the difference between .

[0035] For example, x=5°, or x=1°.

[0036] In another possible implementation of the first aspect, the angle between the second side and the horizontal direction satisfies the following formula:

[0037]

[0038] Wherein, γ is the angle between the second side and the horizontal direction, α is the field of view angle of the detection device, and β is the angle between the first transparent surface and the horizontal direction.

[0039] In this embodiment, when detection signal light near the lower edge of the field of view (FOV) in the vertical direction enters the first transparent surface, the incident angle is larger, resulting in stronger stray light. By setting the angle between the second side and the horizontal direction to be parallel to the direction of the signal light reflected after the detection signal light at the lower edge of the FOV enters the transparent surface, the possibility of stray light caused by large angles of incidence on the transparent surface entering the detection device can be significantly reduced, thereby improving light shielding efficiency.

[0040] In another possible implementation of the first aspect, the angle between the first light shielding plate and the horizontal direction is half of the field of view angle of the detection device in the vertical direction.

[0041] In the above embodiment, the first light shielding plate is tilted to better align with the edge of the detection signal light emitted by the detection device without blocking the normal detection signal light. This can maximize space utilization and allow the light shielding plate to achieve the effect of surrounding the field of view, thereby improving light shielding efficiency.

[0042] Optionally, the barrier column and the plurality of saw teeth are arranged on the first surface of the first light shielding plate. The angle between the first surface of the first light shielding plate and the horizontal direction can be used as the angle between the first light shielding plate and the horizontal direction.

[0043] In another possible implementation manner of the first aspect, a first cavity is further provided on the first light shielding plate, and an opening of the first cavity is provided on a side of the barrier column away from the plurality of saw teeth.

[0044] In this embodiment, the cavity can dissipate stray light that enters the cavity. This dissipation can occur through surface absorption at the cavity or through multiple reflections between the cavity's inner walls, gradually reducing the stray light's energy intensity. Specifically, most stray light is absorbed by the cavity's inner walls. Even if stray light is reflected from the cavity's inner walls, there's a high probability that the reflected light will be transmitted to other inner walls of the cavity, where it will be absorbed multiple times, reducing the stray light's energy intensity.

[0045] Consider a possible situation. When the detection device is set inside the equipment, the light signal at the edge of the field of view may be irradiated into the interior of the equipment or onto the external components of the equipment, resulting in a large amount of stray light. In addition, there is usually residual light at the edge of the field of view of the detection device that exceeds the preset field of view angle, and this residual light may also cause stray light.

[0046] Alternatively, stray light entering the cavity may be reflected by the obstruction column. In this embodiment, a first cavity is provided on a side of the obstruction column away from the plurality of sawteeth to block detection signal light transmitted close to the light shield, thereby reducing stray light caused by invalid detection signal light and thereby reducing detection interference.

[0047] In yet another possible implementation manner of the first aspect, a length of the opening of the first cavity is smaller than a length of a bottom wall of the first cavity.

[0048] That is, the first cavity is a "narrow-mouth" cavity. Due to the small opening, light entering the first cavity is difficult to exit from the opening, thereby further reducing the possibility of stray light entering the detection device and improving the light shielding efficiency.

[0049] Optionally, the length of the opening of the first cavity is the length of the opening of the first cavity along the direction from the barrier column to the plurality of serrations. Similarly, the length of the bottom wall is the length of the opening of the first cavity along the direction from the barrier column to the plurality of serrations.

[0050] In another possible implementation manner of the first aspect, a second cavity is further provided on the first light shielding plate, and an opening of the second cavity is provided between the barrier column and the plurality of saw teeth.

[0051] In this embodiment, the stray light entering the cavity can be consumed by the second cavity, thereby reducing the energy intensity of the stray light.

[0052] In another possible implementation manner of the first aspect, the length of the opening of the second cavity is smaller than the length of the bottom wall of the second cavity, that is, the second cavity is a cavity with a "narrow opening".

[0053] Since the opening is small, when stray light enters the first cavity, it is difficult to be reflected out of the opening, thereby further reducing the possibility of stray light entering the detection device and improving the light shielding efficiency.

[0054] Optionally, the length of the opening of the second cavity is the length of the opening of the second cavity along the direction from the barrier column to the plurality of serrations. Similarly, the length of the bottom wall is the length of the opening of the second cavity along the direction from the barrier column to the plurality of serrations.

[0055] Optionally, the stray light entering the second cavity may be reflected by the obstacle column.

[0056] In another possible implementation of the first aspect, the first shading plate is a step structure, and the barrier column is arranged at the waist of the first shading plate.

[0057] As can be understood, the incident angle and reflectivity are positively correlated (i.e., the smaller the incident angle, the lower the reflectivity). As the incident angle of the detection signal light on the first transparent surface increases, the reflectivity of the first transparent surface to the detection signal light increases, and the generated stray light also increases accordingly. Because the detection signal light emitted by the detection device strikes the first transparent surface at a larger angle at the edge of the field of view, the stray light is primarily distributed on both sides of the first light shield (i.e., at the waist).

[0058] In the above embodiment, the barrier column is arranged at the waist of the trapezoid through a trapezoidal structure (or an inverted V shape), which can effectively suppress the stray light generated by the first transparent surface at the edge of the field of view and improve the shading efficiency.

[0059] Optionally, the upper bottom surface may not be provided with an obstacle column. In some scenarios, the upper bottom surface belongs to a small field of view angle range and the energy of the stray light is relatively weak. Therefore, the upper bottom surface may not be provided with an obstacle column to avoid affecting the emission field of view of the detection device.

[0060] In another possible implementation manner of the first aspect, the first light shielding plate is axisymmetric along a center line of the first light shielding plate.

[0061] In this embodiment, a relatively symmetrical design can achieve a more even shading effect on both sides of the field of view, avoiding different detection accuracy results on the left and right sides, and improving service quality and user experience. It should be understood that in specific implementations, the two sides of the first light shielding plate may not be absolutely symmetrical. This is to indicate that the two sides of the first light shielding plate have similar structures, such as both sides are provided with light shielding structures such as barrier columns, cavities, or saw teeth.

[0062] In another possible implementation of the first aspect, the first cavity is disposed at the waist of the first light shielding plate. Placing the first cavity at the waist can suppress stray light entering from the edge of the field of view, thereby improving light shielding efficiency.

[0063] In another possible implementation of the first aspect, the second cavity is disposed at the waist of the first light shielding plate. Placing the second cavity at the waist can suppress stray light entering from the edge of the field of view, thereby improving light shielding efficiency.

[0064] In another possible implementation of the first aspect, the plurality of saw teeth are provided at the waist of the first light shielding plate. Providing the plurality of saw teeth at the waist can suppress stray light entering from the edge of the field of view and improve light shielding efficiency.

[0065] In another possible implementation manner of the first aspect, the plurality of saw teeth are realized by a columnar body with a triangular cross-section, and the saw teeth extend from a waist on one side of the first shading plate to a waist on the other side of the first shading plate.

[0066] That is, the plurality of saw teeth are provided on the waist portion of the first light shielding plate and the upper bottom surface of the first light shielding plate.

[0067] In this embodiment, the multiple saw teeth are designed to extend from the waist on one side to the upper bottom surface and then to the waist on the other side, avoiding the introduction of new reflective surfaces near the upper bottom surface and reducing the probability of stray light. The multiple saw teeth are arranged along the first light shielding plate of the trapezoidal structure, forming an inverted V-shape on both sides and a central portion distributed along the upper bottom surface. This allows stray light incident on a saw tooth to be reflected toward the sidewall of the next saw tooth, minimizing the amount of stray light reflected back to the detection device and reducing the energy of the stray light.

[0068] In yet another possible implementation manner of the first aspect, the barrier column is inclined toward a side away from the plurality of saw teeth.

[0069] Tilting the barrier column toward the side away from the plurality of saw teeth allows the barrier column to specifically reflect stray light toward the side away from the detection device, further reducing the possibility of stray light entering the detection device, thereby reducing interference caused by stray light.

[0070] When a first cavity is provided on the first shading plate, the barrier column is inclined toward one side of the first cavity, which can increase the possibility that stray light from one side of the first cavity will be reflected by the barrier column into the first cavity, further reducing the interference caused by the stray light and improving the shading efficiency.

[0071] In another possible implementation manner of the first aspect, the angle between the barrier column and the surface of the first sunshade falls within [35°, 45°].

[0072] The surface of the first light-shielding plate here may be a surface on which the first barrier column is provided among the multiple surfaces of the first light-shielding plate.

[0073] In another possible implementation manner of the first aspect, the barrier column includes a first branch and a second branch, the first branch is inclined toward a side away from the plurality of saw teeth, and the second branch connects the first branch and a main body of the first light shielding plate;

[0074] The angle between the first branch and the horizontal direction is a first angle, the angle between the second branch and the horizontal direction is a second angle, and the first angle is smaller than the second angle.

[0075] In this embodiment, first, stray light incident from multiple sawtooth directions can be reflected by the second branch into the multiple sawtooth directions (or into the second cavity). Second, stray light incident from directions away from multiple sawtooth directions can be reflected by the first branch and the second branch toward the direction of the shading plate (when the first cavity is provided, it can be reflected into the first cavity). By tilting at two different angles, a half enclosing frame can be formed, which will not reduce the stray light elimination effect described in the first point above, but can also enhance the stray light elimination effect of the second point, thereby improving the overall shading efficiency.

[0076] In another possible implementation manner of the first aspect, the shading assembly further includes a second shading plate and a third shading plate.

[0077] The first light shielding plate and the second light shielding plate are arranged on both sides along the direction from the barrier column to the plurality of sawtooths, and are respectively connected to the first light shielding plate.

[0078] In this embodiment, the three shading plates can surround the transmitting and receiving field of view of the detection device, reduce the interference of side stray light on the detection, and improve the shading efficiency.

[0079] In another possible implementation manner of the first aspect, the shading component is located between the window and the first transparent surface.

[0080] A plurality of detection signal lights from the window are incident on the first transparent surface, and the light shielding component is used to consume energy of at least one detection signal light reflected by the first transparent surface.

[0081] In the above embodiment, when signal light emitted by the detection device is incident on the first transparent surface, the light shielding assembly can reduce the possibility of signal light reflected by the first transparent surface returning to the detection device, thereby improving the detection accuracy of the detection device. Furthermore, it is possible to place the detection device inside the device, which will allow the detection device to be protected by optical components and extend its service life.

[0082] In another possible implementation of the first aspect, the multiple detection light signals include a first detection signal light, and the first detection signal light is reflected by the first transparent surface to form a first reflected light;

[0083] The first reflected light is transmitted to the plurality of saw teeth, and the plurality of saw teeth are used to consume energy of the first reflected light.

[0084] Consider a possible scenario where, without a light-shielding component, the first reflected light is likely to be diffusely reflected off other objects and thus reach the detection device again. The sawtooth portion, however, can consume the first reflected light. This consumption includes absorbing some or all of the first reflected light and / or reflecting a portion of the first reflected light away from the reflection end. In short, this can reduce the energy intensity of the first reflected light.

[0085] In another possible implementation of the first aspect, the multiple detection light signals include a second detection signal light, and the second detection signal light is reflected by the first transparent surface to form a second reflected light;

[0086] The second reflected light is transmitted to the plurality of saw teeth and reflected by the plurality of saw teeth to form a third reflected light;

[0087] The third reflected light is transmitted to the barrier column, and the barrier column is used to block the third reflected light.

[0088] Consider a possible scenario where the second reflected light reflected by the first transparent surface may also be reflected by the reflective surface to form a third reflected light. This third reflected light is transmitted in a direction approximately parallel to the first light shield and reaches the detection device, causing the detection device to respond to the third reflected light, resulting in a false detection. In the above embodiment, the barrier column is taller than the sawtooth. The third reflected light (e.g., the signal propagating from the light shield surface) that is not consumed by the sawtooth (or reflected from other reflective surfaces) can be blocked by the barrier column, further reducing the interference of stray light on detection.

[0089] It should be understood that the obstruction here may be absorbed by the obstacle column, or reflected by the obstacle column to the side away from the detection device.

[0090] In another possible embodiment of the first aspect, the shading assembly is located between the window and the first transparent surface, the third detection signal light from the window is transmitted to the obstacle column, and is reflected by the obstacle column to form a fourth reflected light, and the fourth reflected light is transmitted to the first cavity, and the first cavity is used to consume the energy of the fourth reflected light.

[0091] As can be seen, the obstacle column can reflect the third detection signal light, forming the fourth reflected light. After the fourth reflected light is transmitted to the first cavity, it can be consumed by the first cavity, avoiding the generation of stray light and improving the ranging accuracy of the detection device.

[0092] In another possible implementation manner of the first aspect, the shading component is located between the window and the first transparent surface.

[0093] The fourth detection signal light from the window is incident on the first transparent surface and reflected by the first transparent surface to form a fifth reflected light;

[0094] The fifth reflected light is transmitted to the plurality of saw teeth and reflected by the plurality of saw teeth to form a sixth reflected light;

[0095] The sixth reflected light is transmitted to the barrier column and reflected by the plurality of saw teeth to form a seventh reflected light. The second cavity is used to consume energy of the seventh reflected light.

[0096] In this embodiment, the sixth reflected light incident on the obstacle column may be reflected to form the seventh reflected light. At this time, if the seventh reflected light is transmitted to the first cavity, it is very likely to be captured by the first cavity, reducing the probability of the seventh reflected light reaching the detection device after transmission, thereby improving the shading efficiency.

[0097] In a second aspect, an embodiment of the present application further provides a detection device, the detection device comprising a detection device body and a light shielding component, the light shielding component being the light shielding component described in any one of the first aspects;

[0098] The detection device body includes a window, and the detection signal light emitted by the detection device body is emitted through the window;

[0099] The shading component is arranged outside the window.

[0100] In a third aspect, an embodiment of the present application further provides a terminal, comprising a detection device, a shading component, and a windshield, wherein the shading component is the shading component described in any one of the first aspects;

[0101] The windshield of the terminal has a first transparent surface;

[0102] The detection device includes a window, and the detection signal light emitted by the detection device is emitted through the window;

[0103] The shading component is arranged between the window and the first transparent surface.

[0104] Optionally, the terminal is a vehicle, a drone or a robot.

[0105] The beneficial effects of the second and third aspects of this application can refer to the beneficial effects of the first aspect, and will not be described one by one here. BRIEF DESCRIPTION OF THE DRAWINGS

[0106] The following is a brief introduction to the drawings used in describing the embodiments.

[0107] FIG1 is a schematic diagram of the installation position of a detection device provided in an embodiment of the present application;

[0108] FIG2A is a schematic diagram of a light path of stray light provided in an embodiment of the present application;

[0109] FIG2B is a schematic diagram of another optical path of stray light provided in an embodiment of the present application;

[0110] FIG3 is a schematic structural diagram of a light shielding assembly provided in an embodiment of the present application;

[0111] FIG4A is a schematic diagram of an optical path provided in an embodiment of the present application;

[0112] FIG4B is a schematic diagram of another optical path provided in an embodiment of the present application;

[0113] FIG5 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0114] FIG6 is a schematic diagram of another optical path provided in an embodiment of the present application;

[0115] FIG7 is a schematic diagram of another optical path provided in an embodiment of the present application;

[0116] FIG8A is a schematic diagram of an optical path provided in an embodiment of the present application;

[0117] FIG8B is a schematic diagram of an optical path provided in an embodiment of the present application;

[0118] FIG9 is a schematic diagram of the field of view and optical path of a detection device;

[0119] FIG10 is a schematic diagram of a scenario in which stray light is generated;

[0120] FIG11 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0121] FIG12 is a schematic diagram of another possible optical path provided in an embodiment of the present application;

[0122] FIG13 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0123] FIG14 is a schematic diagram of another optical path provided in an embodiment of the present application;

[0124] FIG15 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0125] FIG16 is a schematic structural diagram of another light shielding assembly provided in an embodiment of the present application;

[0126] FIG17 is a schematic structural diagram of another light shielding assembly provided in an embodiment of the present application;

[0127] FIG18 is a schematic structural diagram of another light shielding assembly provided in an embodiment of the present application;

[0128] FIG19 is a schematic structural diagram of another light shielding assembly provided in an embodiment of the present application;

[0129] FIG20 is a schematic structural diagram of another light shielding assembly provided in an embodiment of the present application;

[0130] FIG21 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0131] FIG22 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0132] FIG23 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0133] FIG24 is a schematic structural diagram of another light-shielding assembly provided in an embodiment of the present application;

[0134] FIG25A is a schematic cross-sectional view of a possible detection device provided in an embodiment of the present application;

[0135] FIG25B is a schematic diagram showing a three-dimensional structure of a possible detection device provided in an embodiment of the present application;

[0136] FIG26A is a schematic diagram of the structure of a terminal provided in an embodiment of the present application;

[0137] Figure 26B is a structural diagram of another terminal provided in an embodiment of the present application.

[0138] Reference numerals:

[0139] 100 - shading assembly; 10 - first shading plate; 101 - sawtooth; 102 - barrier column; 1021 - first branch; 1022 - second branch; 103 - first cavity; 104 - second cavity; 201 - second shading plate; 202 - third shading plate; 30 - bracket; 901 - in-vehicle device. DETAILED DESCRIPTION

[0140] The embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

[0141] For ease of understanding, the following examples provide some explanations of concepts related to the embodiments of the present application for reference.

[0142] 1. Detection device

[0143] The detection device mentioned in the embodiments of the present application can be a laser radar or other optical detection device, such as a fusion detection device (for example, a detection device integrating a radar detector and an image sensor). Taking a laser radar as an example, the working principle of the laser radar is to detect targets within the field of view by emitting detection signal light and receiving return signal light.

[0144] The detection device in the embodiment of the present application can be used in various fields such as intelligent driving, intelligent transportation, intelligent manufacturing, environmental detection, surveying and mapping, drones, etc., and can complete one or more functions of target detection, distance measurement, speed measurement, target tracking, imaging recognition, etc.

[0145] The detection device in the embodiments of the present application can be applied to vehicle-mounted detection devices (e.g., vehicle-mounted radar), roadside detection devices (e.g., intersection radar), etc., and can also be applied to other detection devices, such as detection devices installed on drones, robots, rail cars, bicycles, traffic lights, speed measuring devices, base stations, etc. This application does not limit the location where the detection device is installed.

[0146] 2. Field of view (FOV)

[0147] There needs to be a line of sight (LOS) between the transmitter of the detection device and the target object, and / or between the receiver of the detection device and the target object, where signal (e.g., radio waves, laser) transmission is uninterrupted. This line of sight can be understood as the field of view.

[0148] In the field of optics, the size of the field of view is related to the field of view angle of the detection device. The larger the field of view angle, the larger the field of view. Among them, the field of view angle refers to the angle formed by the two edges of the maximum range of the object image of the detected object that can pass through the lens, with the lens of the detection device as the vertex. In the embodiment of the present application, the field of view angle in the vertical direction refers to the angle formed by the two edges of the maximum range that can be detected in the vertical direction.

[0149] Installing the detection device inside the device can reduce the possibility of the detection device being corroded by environmental factors such as high temperature, weathering, and rain, slowing the aging rate and extending the service life. As shown in Figure 1, a schematic diagram of the installation position of a detection device provided in an embodiment of the present application is shown. Taking the detection device installed on a vehicle as an example, the detection device can be installed in the vehicle's cockpit. Since the cockpit is protected by an outer shell, it can not only extend the service life, but also allow detection from the perspective of the cockpit, and the availability of the detection results is high.

[0150] However, the signal light emitted by the detection device needs to be transmitted to the outside of the device through transparent components (such as the housing or windshield) on the device for detection. Transparent components are usually low in transmittance, high in reflectivity, and high in scattering. This will reflect the detection signal light emitted by the lidar, introducing a large amount of stray light, which will interfere with the detection, affecting the accuracy of the detection results and poor detection performance.

[0151] Figure 2A is a schematic diagram of the optical path of stray light provided in an embodiment of the present application. A portion of the detection signal light 1 emitted by the detection device may be reflected by the windshield, forming stray light. This stray light may then be reflected onto other objects (for example, objects inside the vehicle), causing diffuse reflection on the objects inside the vehicle. The stray light formed by diffuse reflection is very likely to return to the detection device. For example, the windshield may reflect detection signal light 1 to form stray light 2. This stray light 2 is diffusely reflected off objects inside the vehicle, forming stray light 3 that enters the detection device's viewing window, interfering with detection.

[0152] Figure 2B is a schematic diagram of another stray light optical path provided in an embodiment of the present application. For information on detecting signal light 1 and stray light 2, refer to the above description. In Figure 2B, stray light 4 formed by diffuse reflection may be transmitted to the windshield and reflected a second time by the windshield, forming stray light 5. Stray light 5 enters the window of the detection device, causing interference with detection.

[0153] The specific process of stray light interfering with detection is as follows: When stray light is transmitted into the detection device, the detection device will respond to the stray light, forming a false echo, causing signal misdetection and missed detection, affecting detection accuracy. For example, stray light 3 formed by diffuse reflection entering the detection device may be received by the detector of the detection device, causing the detection device to mistakenly detect the stray light 3 as an echo in the field of view, and may mistakenly believe that there is a "target" ahead, when the target does not actually exist, thereby reducing the accuracy of the detection result of the detection device. In addition, when the signal energy of the stray light 3 is strong, it may also drown out the real echo in the field of view, resulting in a series of problems such as the return signal of the real target being missed, the distance to the real target being calculated incorrectly, or the reflectivity of the real target being calculated incorrectly, thereby reducing the accuracy of the detection result and the detection performance of the detection device.

[0154] In view of this, the embodiments of the present application provide a shading component, a detection device and a terminal, which can reduce the interference of stray light on detection, improve the detection accuracy of the detection device, and improve the detection performance.

[0155] The following is a detailed description of the embodiments of the present application.

[0156] Please refer to Figure 3, which is a schematic structural diagram of a possible shading assembly provided by an embodiment of the present application. The shading assembly 100 may include a first shading plate 10, and the first shading plate 10 is provided with protruding serrations 101. The number of serrations 101 can be one or more.

[0157] The multiple teeth on the first light shield allow stray light to be absorbed or dispersed upon reaching these serrations. Even if it isn't absorbed upon first encountering a tooth, it's highly likely to be reflected again between teeth, gradually reducing the energy intensity of the stray light. Therefore, the multiple teeth on the light shield can significantly reduce the amount of stray light in the environment, and consequently, reduce the interference it can cause on detection.

[0158] Please refer to Figures 4A and 4B. Figure 4A is a schematic diagram of a possible optical path provided in an embodiment of the present application, and Figure 4B is a schematic diagram of another optical path provided in an embodiment of the present application. In the scenarios shown in Figures 4A and 4B, the shading component is arranged between the detection device and the transparent surface. The detection device can emit multiple detection signal lights, and for a certain beam of detection signal light (for easy distinction, it is called the first detection signal light, that is, the solid line with an arrow labeled "T1" in Figure 4A), it is reflected by the transparent surface to form a first reflected light (that is, the solid line with an arrow labeled "R1" in Figure 4A), and multiple saw teeth can consume the energy of the first reflected light R1.

[0159] For example, as shown in Figure 4A, after the first reflected light R1 hits the sawtooth, it is absorbed by the sawtooth surface. For another example, in the light path shown in Figure 4B, the first reflected light R1 can be reflected multiple times within the gaps between the sawtooths. Since each reflection consumes light energy, the energy intensity of the first reflected light R1 gradually decreases.

[0160] Optionally, multiple saw teeth can be closely arranged, that is, the distance between the edges of two saw teeth is small, or even almost zero. It can be understood that when the saw teeth are closely arranged, most of the signal light reflected by the transparent surface will be irradiated on the saw teeth, rather than on the plane between the saw teeth, thereby increasing the consumption of stray light and improving the shading efficiency.

[0161] Please refer to FIG. 5 , which is a schematic structural diagram of another possible shading assembly provided in an embodiment of the present application. The shading assembly 100 includes a first shading plate 10 , on which a protruding obstacle column 102 is provided.

[0162] Optionally, when the first shading plate 10 is provided with a plurality of saw teeth 101 , the barrier column 102 is provided outside the plurality of saw teeth 101 , or between the plurality of saw teeth 101 .

[0163] Further optionally, when the first shading plate 10 is provided with a plurality of saw teeth 101 , the vertical height of the barrier column 102 is higher than the plurality of saw teeth 101 .

[0164] Here, vertical height refers to the height in the vertical direction, and the height here can be either absolute or relative. Optionally, vertical height can refer to the vertical position of the highest point (i.e., absolute height). Alternatively, the vertical height of the barrier column 102 is higher than the plurality of saw teeth 101, which can be understood as: the height of the barrier column's highest point relative to the surface of the first light shielding plate (i.e., relative height) is higher than the height of any of the plurality of saw teeth relative to the surface of the first light shielding plate.

[0165] In addition, the multiple saw teeth 101 shown in FIG5 are closely arranged, and the bottom of each saw tooth is close to the bottom of another saw tooth, so that the plane of the light shielding plate is not exposed between the saw teeth as much as possible, thereby having a higher light shielding efficiency.

[0166] Please refer to Figure 6, which is a schematic diagram of another possible optical path provided by an embodiment of the present application. A light shielding assembly is disposed between the detection device and the transparent surface. A beam of detection signal light (referred to as the second detection signal light for ease of distinction, i.e., the solid arrowed line labeled "T2" in Figure 6) is reflected by the transparent surface to form second reflected light R2. Second reflected light R2 may be reflected by sawtooth or other components within the vehicle, ultimately forming signal light transmitted through the light shield. The barrier column on the first light shield can block the signal light transmitted through the light shield.

[0167] As shown in Figure 6, the second reflected light R2 may be reflected by the sawtooth, forming the third reflected light R3. In this case, the barrier column blocks the third reflected light R3, further reducing the interference of stray light on detection. It should be understood that "blocking" here refers to being absorbed by the barrier column or reflected away from the viewing window.

[0168] It should be understood that Figure 6 illustrates the blocking effect of the barrier column, using the example of blocking third reflected light R3 partially reflected by the sawtooth. The barrier column is not limited to blocking only light reflected by the sawtooth. In specific implementations, signal light reflected by other components may be blocked by the barrier column if the distance between the signal light and the light shield surface is less than the height of the barrier column.

[0169] The above is an exemplary introduction to the structure of the shading assembly. The following describes some possible designs of the embodiments of the present application. It should be noted that the following various designs can be implemented individually or in combination. For the combination, an exemplary explanation will also be given below. The following first introduces various possible designs separately:

[0170] Design 1

[0171] As a possible design, the first light shield is made of a low-reflectivity material. Low-reflectivity materials reflect light less strongly. Therefore, when stray light reaches the light shield, the low-reflectivity material can reduce the possibility of stray light being reflected, reducing the interference of stray light on detection.

[0172] As a possible implementation manner, the surface material of the barrier column on the first light-shielding plate is a low-reflectivity material.

[0173] As an example of a material for the barrier column, the surface of the barrier column is a first material, and the reflectivity of the first material is lower than a first threshold. Exemplarily, the first threshold is 40%, 30%, 20%, 10%, 5%, 2%, or 1%.

[0174] Optionally, the reflectivity here may be the reflectivity at a preset temperature (usually room temperature, such as about 25 degrees Celsius, or standard conditions, 0 degrees Celsius).

[0175] As another possible implementation, the surfaces of the plurality of sawteeth are made of a low-reflectivity material.

[0176] As an example of a sawtooth material, the surfaces of the plurality of sawtooths are made of a second material, and the reflectivity of the second material is lower than a second threshold value. For example, the second threshold value is 40%, or 30%, or 20%, or 10%, or 5%, or 2%, or 1%.

[0177] In a possible implementation manner of the first aspect, a partial surface of the first shading plate (for example, a surface where the barrier columns and the serrations are provided) is made of a low-reflectivity material.

[0178] As an example of a material for the surface of the light shielding plate, the surface of the first light shielding plate is a third material, and the reflectivity of the third material is lower than a third threshold. Exemplarily, the first threshold is 40%, 30%, 20%, 10%, 5%, 2%, or 1%.

[0179] Optionally, the material of the surface of the first light shielding plate can be consistent with the material of the light shielding plate body, that is, the light shielding plate body is made of a material with low reflectivity.

[0180] Alternatively, a layer of low reflectivity material is provided on the sunshade body by spraying, laminating or coating, etc. The material of the sunshade body is not limited, for example, it can be plastic, metal, glass, polymer material, etc.

[0181] Optionally, the first material, the second material, and the third material may be the same material, or different materials. The first threshold, the second threshold, and the third threshold may be the same or different.

[0182] Design 2

[0183] Not limited to the aforementioned design, in another possible design, each of the plurality of saw teeth is inclined toward one side of the obstacle column.

[0184] For example, the inclination may be represented by: in the horizontal direction, the center of gravity of the sawtooth is closer to the obstacle column than the midpoint of the bottom edge of the sawtooth.

[0185] Exemplarily, when the cross section of the sawtooth is a triangle, the base of the triangle is the first surface, and the vertical distance between the vertex of the triangle and the base is less than the length of the line between the midpoint of the triangle and the base.

[0186] In this design, multiple teeth are tilted to make the tips sharper, reducing the energy of stray light.

[0187] When the saw teeth are tilted toward the obstacle column, stray light is more likely to be incident on the side of the saw teeth away from the obstacle column. Even if it is not absorbed and / or consumed, it can be reflected toward the side away from the obstacle column.

[0188] As a possible implementation, the shading component is arranged outside the window of the detection device, and the barrier column is located between the window and the plurality of saw teeth.

[0189] As shown in Figure 7, this is a schematic diagram of another possible optical path provided by an embodiment of the present application. By setting the obstacle column between the sawtooth and the window of the detection device, the sawtooth and the obstacle column can consume stray light that may enter the window of the detection device, thereby reducing the possibility of stray light entering the detection device, thereby reducing the interference caused by stray light.

[0190] Furthermore, the tilted sawtooth pattern makes it more likely that stray light R1 will be reflected multiple times between the teeth, leading to multiple absorption of the stray light. Even if it isn't absorbed, it's more likely to strike the side of the sawtooth facing away from the viewing window, where it will be reflected away from the viewing window. This embodiment can further reduce interference from stray light and improve the detection accuracy of the detection device.

[0191] In another possible embodiment, a light-shielding assembly is positioned between the viewing window and the transparent surface. Each of the multiple sawtooth elements includes a first side and a second side, wherein the first side is proximal to the viewing window and the second side is distal to the window. The second side of the sawtooth is tilted at an angle that is parallel or nearly parallel to the angle at which most stray light reflected from the transparent surface is reflected onto the sawtooth. This arrangement allows stray light to be more accurately directed into the gap between the two sawtooth elements, thereby enhancing the sawtooth's ability to dissipate signal light and improve light-shielding efficiency.

[0192] Furthermore, the angle between the second side and the horizontal direction is related to the angle between the first transparent surface and the horizontal direction and the field of view angle of the detection device in the vertical direction.

[0193] Please refer to Figure 8A, which is a schematic diagram of another possible optical path provided by an embodiment of the present application, wherein the field of view angle of the detection device in the vertical direction is α, and the angle between the transparent surface and the horizontal direction is β. For the detection signal light emitted close to the edge of the field of view, the angle between it and the horizontal direction is α / 2. When the signal light hits the transparent surface, the complementary angle of the incident angle is β-α / 2. It is easy to obtain from the geometric relationship that the angle between the signal light reflected by the transparent surface and the horizontal direction is 2β-α / 2.

[0194] Because the first edge of the sawtooth faces the detection device's viewing window, stray light reflected from the sawtooth toward the detection device is reduced when the incident stray light is parallel to the second edge. The reflectivity of a transparent surface follows the following rule: the greater the angle of incidence, the greater the reflectivity and the greater the stray light. Detection signal light near the edge of the field of view has a larger angle of incidence. Therefore, by designing the sawtooth's inclination based on the field of view and the inclination of the transparent surface, a better light-shielding effect can be achieved.

[0195] Optionally, the angle γ between the second side and the horizontal direction satisfies the following formula:

[0196] Where x is close to 0. Where γ is the angle between the second side and the horizontal direction, α is the field of view angle of the detection device in the vertical direction, β is the angle between the transparent surface and the horizontal direction, and x is the angle between γ and The absolute value of the difference between .

[0197] For example, x = 5°, or x = 1°. When the second edge is nearly parallel to the direction of the reflected signal, the light signal is more likely to be reflected by the sawtooth in a direction away from the window of the detection device, which can further reduce stray light toward the detection device and improve light shielding efficiency.

[0198] In one possible solution, x can be 0. That is, the angle between the second side and the horizontal direction satisfies the following formula:

[0199]

[0200] Wherein, γ is the angle between the second side and the horizontal direction, α is the field of view angle of the detection device, and α is the angle between the first transparent surface and the horizontal direction.

[0201] In the vertical direction, when detection signal light near the lower edge of the FOV enters a transparent surface, the incident angle is greater, resulting in greater stray light. By setting the angle between the second side and the horizontal direction to be parallel to the direction of the signal light reflected from the transparent surface after the detection signal light at the lower edge of the FOV enters the windshield, the probability of stray light being diffusely reflected back to the windshield is reduced. This significantly reduces the possibility of stray light from the transparent surface entering the detection device at large angles, thereby improving light shielding efficiency.

[0202] As a possible implementation manner, the angle between the first light shielding plate and the horizontal direction is half of the field of view angle of the detection device in the vertical direction.

[0203] Optionally, the barrier column and the plurality of saw teeth are arranged on the first surface of the first light shielding plate. The angle between the first surface of the first light shielding plate and the horizontal direction can be used as the angle between the first light shielding plate and the horizontal direction.

[0204] Please refer to Figure 8B, which is a schematic diagram of another possible optical path provided by an embodiment of the present application. The detection device has a vertical field of view angle α, and the angle between the first surface and the horizontal direction is half of the detection device's field of view angle, i.e., α / 2. Based on geometric relationships, it is easy to obtain that the angle between the sawtooth and the first surface is 2β-α.

[0205] In the above embodiment, the first light shielding plate is tilted to better align with the edge of the detection signal light emitted by the detection device without blocking the normal detection signal light. This can maximize space utilization and allow the light shielding plate to achieve the effect of surrounding the field of view, thereby improving light shielding efficiency.

[0206] Design 3

[0207] When the detection device is installed inside the device, light signals at the edge of the field of view may illuminate the device or its external components, resulting in a large amount of stray light. In addition, there is usually residual light at the edge of the detection device's field of view that exceeds the preset field of view angle, which can also cause stray light. This stray light can interfere with the detection device's detection and affect detection accuracy.

[0208] Please refer to Figure 9, which schematically illustrates the field of view and optical path of a detection device. Referring to part (a) of Figure 9, the detection device's vertical field of view covers the in-vehicle device 901 on which it is installed. As shown in area 902, detection signal light at the edge of the field of view may impinge on in-vehicle device 901, causing diffuse reflection.

[0209] As shown in the optical path diagram in part (b) of FIG9 , the detection signal light 1 near the edge of the field of view is reflected by the in-vehicle device 901 to form stray light 2. The stray light 2 may directly return to the detection device, causing interference.

[0210] As shown in the optical path diagram of part (c) of FIG9 , the stray light 3 formed after diffuse reflection may also be transmitted to the transparent surface and reflected back to the detection device by the transparent surface, causing interference.

[0211] Similarly, stray light generated by diffuse reflections from exterior vehicle components can also cause interference similar to that shown in part (b) of Figure 9. Please refer to Figure 10, which illustrates a scenario where stray light is generated. For example, if the detection device is installed in a vehicle, the detection signal light at the edge of the detection device's field of view is very likely to strike the vehicle's hood (or engine cover) 1001, causing diffuse reflections on the hood 1001 and causing interference.

[0212] The shading assembly shown in Figure 11 can solve the aforementioned problem. Figure 11 is a schematic structural diagram of another possible shading assembly provided in an embodiment of the present application. The first shading plate 10 of the shading assembly 100 further comprises a cavity (hereinafter referred to as the first cavity for ease of distinction) 103. The opening of the first cavity 103 is located on the side of the barrier column 102 away from the plurality of serrations 101.

[0213] The cavity can dissipate stray light that enters it. This dissipation can occur through surface absorption or through multiple reflections between the cavity's inner walls, gradually reducing the energy intensity of the stray light. In other words, most stray light is absorbed by the cavity's inner walls. Even if stray light is reflected from the cavity's inner walls, there's a high probability that the reflected light will be transmitted to other inner walls, where it will be absorbed multiple times, reducing the energy intensity of the stray light.

[0214] Alternatively, stray light entering the first cavity may be reflected by the obstruction column. In this embodiment, disposing the first cavity on the side of the obstruction column away from the plurality of sawteeth can block the detection signal light transmitted close to the light shield, reducing stray light caused by invalid detection signal light, thereby reducing detection interference.

[0215] Please refer to Figure 12, which is a schematic diagram of another possible optical path provided by an embodiment of the present application. As shown in Figure 12, a beam of detection signal light from the detection device (for easy distinction, referred to as the third detection signal light, i.e., T3 shown in Figure 12) is irradiated on the obstacle column and reflected by the obstacle column to form reflected light (for easy distinction, referred to as the fourth reflected light, i.e., R4 shown in Figure 12). This reflected light R4 is transmitted to the second cavity, which can consume the energy of the reflected light R4 (absorption, or multiple reflections within the cavity) to avoid the generation of stray light.

[0216] Optionally, the length of the opening of the first cavity is less than the length of the bottom wall of the first cavity. That is, the first cavity is a "narrow-mouth" cavity. Due to the small opening, when light enters the first cavity, it is reflected multiple times within the cavity and lost, which inhibits outward emission. This further reduces the possibility of stray light entering the detection device and improves light shielding efficiency.

[0217] For example, the cross-section of the first cavity can be in the shape of a trapezoid or approximately trapezoid, with the lower base of the trapezoid being the bottom wall of the cavity and the upper base being the opening of the cavity.

[0218] Optionally, the length of the opening of the first cavity is the length of the opening of the first cavity along the direction from the barrier column to the plurality of serrations. Similarly, the length of the bottom wall is the length of the opening of the first cavity along the direction from the barrier column to the plurality of serrations.

[0219] As a possible implementation, the aforementioned third detection signal light T3 is the detection signal light at the edge of the field of view of the detection device.

[0220] Optionally, the detection device is installed inside the device, and the third detection signal light is extended along the propagation direction and intersects with the device (or a component of the device).

[0221] In one possible scenario, the detection device is installed inside the vehicle, and the propagation direction of the third detection light is extended to intersect with the vehicle's engine hood.

[0222] In another possible scenario, the detection device is installed on an instrument panel (IP) of the vehicle (or called an IP repeater), and the propagation direction of the third detection light is extended to intersect with the instrument panel of the vehicle.

[0223] It can be seen that the third detection signal light is an invalid signal light of the optical signal that was originally intended to illuminate the instrument panel and / or the cabin cover. The invalid signal can be blocked and consumed by the obstacle column and the second cavity, thereby avoiding the generation of stray light and improving the ranging accuracy of the detection device.

[0224] Design 4

[0225] FIG13 is a schematic diagram of another possible light shielding assembly according to an embodiment of the present application. The first light shielding plate 10 of the light shielding assembly 100 is further provided with a cavity (hereinafter referred to as the second cavity for ease of distinction) 104 , the opening of the second cavity 104 being located between the plurality of saw teeth 101 and the barrier column 102 .

[0226] The second cavity 104 can dissipate incoming stray light. This dissipation can be achieved through absorption within the cavity or through multiple reflections between the cavity's inner walls, dissipating the stray light's energy. Specifically, some stray light may be absorbed by the cavity's inner walls. Even if stray light is reflected within the cavity, the reflected signal light is likely to be transmitted to other cavity walls, where it will be absorbed multiple times, dissipating the stray light's energy.

[0227] Optionally, the stray light entering the second cavity may be reflected by the obstacle column. Figure 14 is a schematic diagram of another possible optical path provided by an embodiment of the present application, in which the shading component is arranged between the window of the detection device and the transparent surface. A beam of detection signal light from the detection device (for easy distinction, it is called the fourth detection signal light, that is, T4 shown in Figure 14) is irradiated onto the transparent surface, and the first transparent surface reflects to form a reflected light (for easy distinction, it is called the fifth reflected light, that is, R5 shown in Figure 14). The fifth reflected light R5 is transmitted to the multiple saw teeth and is reflected by the multiple saw teeth to form the sixth reflected light R6. When the sixth reflected light R6 is transmitted to the obstacle column, it is partially reflected by the obstacle column. For example, the seventh reflected light R7 obtained by reflection is transmitted to the second cavity, and the second cavity is used to consume the energy of the seventh reflected light R7.

[0228] Optionally, the second cavity can have a narrow opening. Due to the small opening, when stray light enters the second cavity, it is reflected multiple times within the cavity and lost, suppressing outward emission, thereby further improving light shielding efficiency. For example, the cross-section of the second cavity can be trapezoidal or approximately trapezoidal, with the lower base of the trapezoid forming the bottom wall of the cavity and the upper base forming the cavity opening. For another example, the second cavity can be shaped like an altar with a large belly and a narrow mouth.

[0229] Optionally, the length of the opening of the second cavity is the length of the opening of the second cavity along the direction from the barrier column to the plurality of serrations. Similarly, the length of the bottom wall is the length of the opening of the second cavity along the direction from the barrier column to the plurality of serrations.

[0230] Design 5

[0231] Not limited to the aforementioned design, in one possible design, the barrier column is inclined toward a side away from the plurality of saw teeth.

[0232] Please refer to Figure 15 , which is a schematic diagram of the structure of another possible shading assembly provided by an embodiment of the present application. As shown in Figure 15 , the barrier column 102 on the first shading plate 10 is tilted away from the side of the plurality of saw teeth 101 .

[0233] In this embodiment, when the barrier column is tilted away from the multiple teeth, stray light can be reflected into the extinction cavity, improving light blocking efficiency. In this case, placing the detection device on the side of the barrier column away from the multiple teeth allows the barrier column to specifically reflect stray light away from the detection device, further reducing the possibility of stray light entering the detection device, thereby reducing the interference caused by stray light.

[0234] In addition, when the first cavity 103 is provided on the first shading plate, the barrier column is tilted toward one side of the first cavity 103, which can increase the possibility that stray light from one side of the first cavity 103 will be reflected by the barrier column into the first cavity, further reducing the interference caused by the stray light and improving the shading efficiency.

[0235] Optionally, the angle between the obstruction column and the light shield surface falls within [35°, 45°]. In this case, the degree of inclination is moderate, which can form an encircling effect around the first cavity, preventing stray light from escaping from the first cavity and improving light shielding efficiency. The surface of the first light shield here can refer to the surface of the multiple surfaces of the first light shield on which the first obstruction column is disposed.

[0236] Optionally, the top of the obstacle column may be parallel to the first surface, or parallel to the edge of the field of view of the detection device, so as to reduce stray light caused by the top of the obstacle column.

[0237] Please refer to Figure 16, which is a schematic diagram of the structure of another possible light shielding assembly provided by an embodiment of the present application. As shown in Figure 16, the barrier column includes a first branch 1021 and a second branch 1022, and the first branch 1021 and the second branch 1022 are inclined toward the second side.

[0238] The second branch 1022 connects the first branch 1021 and the main body of the first sunshade 10, the angle between the first branch 1021 and the horizontal direction is a first angle (such as the angle of label ① in Figure 16), and the angle between the second branch 1022 and the horizontal direction is a second angle, and the first angle is greater than the second angle (such as the angle of label ② in Figure 16).

[0239] In this embodiment, first, stray light incident from multiple sawtooth directions can be reflected by the second branch into the multiple sawtooth directions (or into the second cavity). Second, stray light incident from directions away from multiple sawtooth directions can be reflected by the first branch and the second branch toward the direction of the shading plate (when the first cavity is provided, it can be reflected into the first cavity). By tilting at two different angles, a half enclosing frame can be formed, which will not reduce the stray light elimination effect described in the first point above, but can also enhance the stray light elimination effect of the second point, thereby improving the overall shading efficiency.

[0240] Optionally, when the cross section of the branch is an irregular shape, the angle between the side of the first branch away from the multiple saw teeth and the horizontal direction is the aforementioned first angle, and the angle between the side of the second branch away from the multiple saw teeth and the horizontal direction is the aforementioned second angle.

[0241] Please refer to Figure 17, which is a schematic diagram of the structure of another possible light-shielding assembly provided in an embodiment of the present application. The cross-sections of the first branch 1021 and the second branch 1022 are both irregular. The first branch 1021 is tilted away from the teeth, while the edge near the teeth is tilted toward the teeth. This effectively blocks stray light from both sides.

[0242] At this time, the angle between the side of the first branch 1021 away from the multiple saw teeth and the horizontal direction is a first angle (such as the angle marked ① in Figure 17). Similarly, the angle between the side of the first branch 1021 away from the multiple saw teeth and the horizontal direction is a second angle (such as the angle marked ② in Figure 17).

[0243] Design 6

[0244] Optionally, the cross-section of the first light shielding plate is trapezoidal or inverted V-shaped.

[0245] Please refer to Figure 18, which is a schematic diagram of the structure of another possible shading assembly provided in an embodiment of the present application. In the shading assembly 100, the first shading plate 10 is a step structure. The step structure includes an upper bottom surface at the top and a waist portion at the side.

[0246] As a possible implementation, the barrier column 102 is provided at the waist of the first sunshade.

[0247] As can be understood, the incident angle and reflectivity are positively correlated. Specifically, as the angle of incidence of the detection signal light on the first transparent surface increases, the reflectivity of the first transparent surface increases, and the resulting stray light also increases accordingly. Because the detection signal light emitted by the detection device strikes the first transparent surface at a larger angle at the edge of the field of view, the stray light is primarily distributed on both sides of the light shield (i.e., at the waist).

[0248] In the above embodiment, the barrier column is set at the waist of the trapezoid through a trapezoidal structure (an inverted V shape when the upper bottom surface is not considered), which can effectively suppress the stray light generated by the first transparent surface incident at the edge of the field of view and improve the shading efficiency.

[0249] Optionally, the upper bottom surface may not be provided with an obstacle column. In some scenarios, the upper bottom surface belongs to a small field of view angle range.

[0250] Optionally, the first shading plate is symmetrical along the center line of the first shading plate. For example, in the shading assembly shown in FIG18 , the center line is a line connecting the midpoint of the first side and the midpoint of the second side of the first shading plate 10 , and the center line is located on the upper bottom surface.

[0251] In this embodiment, a relatively symmetrical design can achieve a more even shading effect on both sides of the field of view, avoiding different detection accuracy results on the left and right sides, and improving service quality and user experience. It should be understood that in actual implementation, absolute symmetry may not be achieved on both sides. Here, relative symmetry is described to indicate that the two sides of the first light shield may have similar designs.

[0252] As a possible embodiment, the first cavity 103 extends from the waist of one side to the waist of the other side of the first light shielding plate 10, passing through the upper bottom surface. As shown in FIG18 , the first cavity 103 extends from the third side to the fourth side of the first light shielding plate 10.

[0253] As another possible implementation, the first cavity is disposed at the waist of the first light shielding plate. Disposing the first cavity at the waist can suppress stray light entering from the edge of the field of view, thereby improving light shielding efficiency.

[0254] Optionally, in the direction from the third side to the fourth side, the length of the first cavity is the same as or similar to the length of the obstacle column. For example, the difference between the length of the first cavity and the length of the obstacle column is less than or equal to 20%, 10%, or 5% of the length of the second cavity.

[0255] Since the second cavity can be used in combination with the barrier column, setting the length of the second cavity to be equivalent to the length of the barrier column can improve the shading effect.

[0256] As a possible implementation, the second cavity extends from the waist of one side of the first light shielding plate to the waist of the other side, passing through the upper bottom surface.

[0257] As another possible implementation, the second cavity is disposed at the waist of the first light shielding plate. Placing the second cavity at the waist can suppress stray light entering from the edge of the field of view and improve light shielding efficiency.

[0258] Optionally, in the direction from the third side to the fourth side, the length of the second cavity is the same as or similar to the length of the obstacle column.

[0259] As a possible implementation, multiple saw teeth are provided at the waist of the first light shield. As shown in FIG18 , saw teeth 101 are provided at the waist of the trapezoid. Placing multiple saw teeth at the waist can suppress stray light entering at the edge of the field of view, improving light shielding efficiency.

[0260] As another possible embodiment, the plurality of saw teeth extend from the waist of one side of the first light shielding plate to the waist of the other side, passing through the upper bottom surface. That is, the plurality of saw teeth are provided at the waist of the first light shielding plate and the upper bottom surface of the first light shielding plate.

[0261] Figure 19 is a schematic diagram of the structure of another possible light shielding assembly provided in an embodiment of the present application. In the light shielding assembly 100, the plurality of serrations on the first light shielding plate 10 extend from the waist of one side (e.g., the third side) of the first light shielding plate to the waist of the other side (e.g., the fourth side), passing through the upper bottom surface.

[0262] In this embodiment, the multiple saw teeth are designed to be continuous from the third side to the fourth side, avoiding the introduction of new reflective surfaces at the saw tooth terminals and reducing the probability of stray light. The multiple saw teeth are arranged along a trapezoidal shape, with the two sides forming an inverted V-shape and the middle portion distributed along the upper bottom surface. This allows stray light incident on a saw tooth to be reflected toward the sidewall of another saw tooth, minimizing the amount of stray light reflected to the detection device and reducing the energy of the stray light.

[0263] Optionally, in the trapezoidal light shielding plate, the upper bottom surface of the trapezoid is parallel to the horizontal plane. In this case, the portions of the plurality of saw teeth on the upper bottom surface of the trapezoidal structure are also parallel to the horizontal plane.

[0264] In this embodiment, the multiple saw teeth are designed as a structure that stretches from the waist on one side to the upper bottom surface and then to the waist on the other side, avoiding the introduction of a new reflective surface near the upper bottom surface and reducing the probability of generating stray light.

[0265] Optionally, the cross-section of the sawtooth may be tooth-shaped, such as triangular.

[0266] Design 7

[0267] Not limited to the aforementioned design, in another possible design, the shading assembly further includes a second shading plate and a third shading plate, and the first shading plate and the second shading plate are arranged on both sides along the obstacle column to the multiple sawtooth directions, and are respectively connected to the first shading plate.

[0268] Please refer to Figure 20, which is a schematic diagram of another possible light shielding assembly provided in an embodiment of the present application. Light shielding assembly 100 includes a first light shielding plate 10, a second light shielding plate 201, and a third light shielding plate 202. The second light shielding plate 201 is disposed on and connected to the third side of the first light shielding plate 10, and the second light shielding plate 201 is disposed on and connected to the fourth side of the first light shielding plate 10. The second light shielding plate 201 and the third light shielding plate 202 surround a portion of the surface of the first light shielding plate 10. In this embodiment, the three light shielding plates can surround the transmitting and receiving field of view of the detection device, reduce the interference of side stray light on detection, and improve light shielding efficiency.

[0269] As a possible implementation, the second light shielding plate 201 may also have a structure similar to that of the first light shielding plate 10, such as having serrations, etc. For details, please refer to the aforementioned design of the first light shielding plate 10. Similarly, the third light shielding plate 202 may also have a structure similar to that of the first light shielding plate 10.

[0270] Optionally, the shading assembly further includes a bracket 30 , which can connect the first shading plate 10 , the second shading plate 201 and the third shading plate 202 , so that the structure of the shading assembly 100 is more stable.

[0271] In addition, in some scenarios, the shading assembly 100 can be more stably mounted on the detection device through the bracket 30 to prevent it from falling off and improve stability.

[0272] The above describes various possible designs in the embodiments of the present application. The following describes several examples of combining multiple designs.

[0273] 21 is a schematic diagram of the structure of another possible light shielding assembly provided in an embodiment of the present application. The light shielding assembly 100 includes a first light shielding plate 10 , on which are provided saw teeth 101 , an obstacle column 102 and a first cavity 103 .

[0274] The first light shielding plate is tilted. When the light shielding assembly is used to shield the detection device from light, the upper surface of the first light shielding plate is parallel to the edge of the field of view of the detection device.

[0275] 22 is a schematic diagram of another possible shading assembly provided in an embodiment of the present application. The shading assembly 100 includes a first shading plate 10 , which is provided with saw teeth 101 , an obstacle column 102 , a first cavity 103 , and a second cavity 104 .

[0276] The first light shielding plate is tilted. When the light shielding assembly is used to shield the detection device from light, the upper surface of the first light shielding plate is parallel to the edge of the field of view of the detection device.

[0277] Please refer to Figure 23, which is a schematic diagram of the structure of another possible light shielding assembly provided in an embodiment of the present application. Light shielding assembly 100 includes a first light shielding plate 10, a second light shielding plate 201, and a third light shielding plate 202. The second light shielding plate 201 and the third light shielding plate 202 surround a portion of the surface of the first light shielding plate 10. The first light shielding plate 10 is provided with serrations 101, an obstacle column 102, a first cavity 103, and a second cavity 104.

[0278] The first light shielding plate is a stepped structure, and the saw teeth 101, the barrier column 102, the first cavity 103 and the second cavity 104 are arranged at the waist of the trapezoid.

[0279] Please refer to Figure 24, which is a schematic diagram of the structure of another possible light shielding assembly provided in an embodiment of the present application. Light shielding assembly 100 includes a first light shielding plate 10, a second light shielding plate 201, and a third light shielding plate 202. The second light shielding plate 201 and the third light shielding plate 202 surround a portion of the surface of the first light shielding plate 10. The first light shielding plate 10 is provided with serrations 101, an obstacle column 102, a first cavity 103, and a second cavity 104.

[0280] The first light shielding plate 10 has a stepped structure, with the barrier column 102, first cavity 103, and second cavity 104 positioned at the waist of the trapezoid. The plurality of serrations 101 extend from the waist of one side (e.g., the third side) of the first light shielding plate 10 through the upper bottom surface to the waist of the other side (e.g., the fourth side) of the first light shielding plate 10.

[0281] An embodiment of the present application also provides a detection device, which includes the aforementioned shading component, such as the shading component described in the embodiments of Figures 3, 5, 9, 14, 15, 17, 18, 19, 20, 21, 22, 23, or 24, and / or its possible implementation methods.

[0282] Please refer to Figures 25A and 25B. Figure 25A is a cross-sectional schematic diagram of a possible detection device provided in an embodiment of the present application, and Figure 25B is a three-dimensional structural schematic diagram of a possible detection device provided in an embodiment of the present application.

[0283] As shown in FIG. 25A and FIG. 25B , the detection device 250 includes a detection device body and a light-shielding component. The light-shielding component is the aforementioned light-shielding component. For related descriptions, reference can be made to the description in the aforementioned embodiment.

[0284] The detection device body comprises a window, and the detection signal light emitted by the detection device body is emitted through the window; and the shading component is arranged outside the window.

[0285] Optionally, the barrier column on the shading plate in the shading assembly is closer to the window than the saw teeth.

[0286] Optionally, the detection device column further includes a receiving end for receiving an echo signal corresponding to the detection signal light. The echo signal is used to obtain relevant information about the target in the field of view, such as characteristic quantities such as the target's position, shape, or speed.

[0287] An embodiment of the present application also provides a terminal, which includes a detection device, a shading assembly and a windshield, wherein the shading assembly is the aforementioned shading assembly, such as the shading assembly described in the embodiments of Figures 3, 5, 9, 14, 15, 17, 18, 19, 20, 21, 22, 23, or 24, and / or its possible implementation methods.

[0288] The detection device includes a window, and the detection signal light emitted by the detection device is emitted through the window;

[0289] The detection device is arranged in the windshield of the terminal. The windshield of the terminal has a first transparent surface. The shading component is arranged between the window and the first transparent surface.

[0290] Optionally, the above-mentioned terminal may include a mobile platform or transportation tool such as a vehicle, a ship, an airplane, a train, a spacecraft, an unmanned aerial vehicle, or a robot.

[0291] FIG26A is a schematic diagram of the structure of a possible terminal provided in an embodiment of the present application. Taking a vehicle as an example, the terminal includes a detection device and a light shielding assembly, both of which are disposed within the vehicle's windshield. Alternatively, the detection device may be disposed on the vehicle's dashboard.

[0292] The shading component can significantly reduce the stray light in front of the detection device, improve the detection device's ability to resist stray light interference, and enable the detection device to maintain good signal effectiveness when installed in the vehicle cabin, thereby protecting the detection device from external high temperatures, rain and weathering. This not only increases the service life of the laser radar, but also makes the installation location of the laser radar more flexible, thereby improving the user experience.

[0293] It should be understood that the installation location of the detection device shown in Figure 26A is merely an example. In specific implementations, the detection device can be installed within the transparent housing at any location within the terminal. For example, Figure 26B shows a schematic diagram of the structure of another possible terminal provided in an embodiment of the present application, in which the detection device and the light shielding assembly are both installed within the vehicle's windshield. The detection device is installed above the cockpit and can optionally be secured with a mounting bracket to maintain stability.

[0294] In the description of this application, the terms "center", "up", "down", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0295] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0296] The “at least one” mentioned in the embodiments of this application refers to one or more, and “plurality” refers to two or more. “At least one of the following items” or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can represent: a, b, c, (a and b), (a and c), (b and c), or (a and b and c), where a, b, c can be single or multiple. “And / or” describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character “ / ” generally indicates that the previous and next associated objects are in an “or” relationship.

[0297] Furthermore, unless otherwise indicated, ordinal numbers such as "first" and "second" in the embodiments of this application are used to distinguish multiple objects and are not intended to limit the order, timing, priority, or importance of the multiple objects. For example, the first detection signal light and the second detection signal light are merely for ease of description and do not indicate a difference in their source, order, or importance. In some embodiments, the first detection signal light and the second detection signal light may be the same detection signal light.

[0298] In the above embodiments, the term "when" can be interpreted to mean "if...", "after...", "in response to determining...", or "in response to detecting...", depending on the context. The above are merely optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the concepts and principles of the present application shall be included in the scope of protection of the present application.

[0299] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

Claims

1. A shading component, characterized in that: The shading component includes: The first light shielding plate is provided with a protruding barrier column and a plurality of protruding saw teeth, and the vertical height of the barrier column is higher than the plurality of saw teeth.

2. The shading assembly according to claim 1, wherein: The material of the surface of the obstacle column and the material of the surfaces of the plurality of sawteeth are a first material, and the reflectivity of the first material is lower than a first threshold.

3. The shading assembly according to claim 1, wherein: Each of the plurality of saw teeth is inclined toward one side of the obstacle column.

4. The shading assembly according to any one of claims 1 to 3, characterized in that: The shading component is arranged outside the window of the detection device; The barrier column is located between the viewing window and the plurality of saw teeth.

5. The shading assembly according to claim 4, characterized in that: The shading component is located between the viewing window and the first transparent surface, and each of the plurality of saw teeth includes a first side and a second side, wherein the first side is close to the viewing window and the second side is far from the viewing window; The angle between the second side and the horizontal direction is related to the angle between the first transparent surface and the horizontal direction and the field of view of the detection device in the vertical direction.

6. The shading assembly according to claim 5, characterized in that: The angle between the second side and the horizontal direction satisfies the following formula: Wherein, γ is the angle between the second side and the horizontal direction, α is the field of view angle of the detection device, and β is the angle between the first transparent surface and the horizontal direction. 7 . The shading assembly according to claim 5 , wherein the angle between the first shading plate and the horizontal direction is half of the field of view angle of the detection device in the vertical direction.

8. The shading assembly according to any one of claims 1 to 7, characterized in that: The first light shielding plate is further provided with a first cavity, and an opening of the first cavity is provided on a side of the barrier column away from the plurality of saw teeth; The length of the opening of the first cavity is smaller than the length of the bottom wall of the second cavity.

9. The shading assembly according to any one of claims 1 to 8, characterized in that: A second cavity is further provided on the first light shielding plate, and an opening of the second cavity is provided between the barrier column and the plurality of saw teeth; The length of the opening of the second cavity is smaller than the length of the bottom wall of the first cavity.

10. The shading assembly according to any one of claims 1 to 9, characterized in that: The first shading plate is a step structure, and the barrier column is arranged at the waist of the first shading plate.

11. The shading assembly according to claim 10, wherein: The plurality of saw teeth are arranged at the waist of the first light shielding plate.

12. The shading assembly according to any one of claims 1 to 11, characterized in that: The plurality of saw teeth are realized by a columnar body with a triangular cross section, and the saw teeth extend from a waist portion on one side of the first light shielding plate to a waist portion on the other side of the first light shielding plate.

13. The shading assembly according to any one of claims 1 to 12, characterized in that: The barrier column is inclined toward a side away from the plurality of saw teeth, and an angle between the barrier column and the surface of the first light shielding plate falls within [35°, 45°].

14. The shading assembly according to claim 13, wherein: The barrier column includes a first branch and a second branch, the first branch is inclined toward a side away from the plurality of saw teeth, and the second branch connects the first branch and the main body of the first light shielding plate; The angle between the first branch and the horizontal direction is a first angle, the angle between the second branch and the horizontal direction is a second angle, and the first angle is smaller than the second angle.

15. The shading assembly according to any one of claims 1 to 13, further comprising a second shading plate and a third shading plate. The first light shielding plate and the second light shielding plate are arranged on both sides along the direction from the barrier column to the plurality of sawtooths, and are respectively connected to the first light shielding plate.

16. The shading assembly according to claim 15, wherein: The shading component is located between the window and the first transparent surface. A plurality of detection signal lights from the window are incident on the first transparent surface, and the light shielding component is used to consume energy of at least one detection signal light reflected by the first transparent surface.

17. The shading assembly according to claim 16, wherein: The plurality of detection light signals include a first detection signal light, wherein the first detection signal light is reflected by the first transparent surface to form a first reflected light; The first reflected light is transmitted to the plurality of saw teeth, and the plurality of saw teeth are used to consume energy of the first reflected light.

18. The shading assembly according to claim 16, wherein: The plurality of detection light signals include a second detection signal light, and the second detection signal light is reflected by the first transparent surface to form a second reflected light; The second reflected light is transmitted to the plurality of saw teeth and reflected by the plurality of saw teeth to form a third reflected light; The third reflected light is transmitted to the barrier column, and the barrier column is used to block the third reflected light.

19. The shading assembly according to claim 8, wherein: The shading component is located between the window and the first transparent surface. The third detection signal light from the window is transmitted to the obstacle column, and is reflected by the obstacle column to form a fourth reflected light. The fourth reflected light is transmitted to the first cavity, and the first cavity is used to consume the energy of the fourth reflected light.

20. The shading assembly according to claim 9, wherein: The shading component is located between the window and the first transparent surface. The fourth detection signal light from the window is incident on the first transparent surface and reflected by the first transparent surface to form a fifth reflected light; The fifth reflected light is transmitted to the plurality of saw teeth and reflected by the plurality of saw teeth to form a sixth reflected light; The sixth reflected light is transmitted to the barrier column and reflected by the plurality of saw teeth to form a seventh reflected light. The second cavity is used to consume energy of the seventh reflected light.

21. A detection device, characterized in that: The detection device comprises a detection device body and a light shielding component, and the light shielding component is the light shielding component according to any one of claims 1 to 20; The detection device body includes a window, and the detection signal light emitted by the detection device body is emitted through the window; The shading component is arranged outside the window.

22. A terminal, characterized in that: The terminal comprises a detection device, a shading component and a windshield, wherein the shading component is the shading component according to any one of claims 1 to 17; The windshield of the terminal has a first transparent surface; The detection device includes a window, and the detection signal light emitted by the detection device is emitted through the window; The shading component is arranged between the window and the first transparent surface.

23. The terminal according to claim 22, characterized in that The terminal is a vehicle, a drone or a robot.

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