Visibility detection system

Abstract

The present application provides a kind of visibility detection system, comprising: camera;Visibility detection device, the top surface of visibility detection device and the bottom surface of camera are in contact;Visibility detection device includes: shell, the top surface of shell extends downwardly along the direction of same direction with optical axis;Mounting portion, mounting portion is connected to the bottom surface of shell, and mounting portion has bottom portion extending along horizontal direction;Shell has light shielding member connected between mounting portion and top surface, light shielding member includes shielding portion and the light transmission portion arranged below shielding portion, and light transmission portion is used to transmit light emitting component and light receiving component;Shielding portion is formed as the plane that is inclined upwardly along the direction opposite to optical axis, shielding portion forms first acute angle with horizontal plane, and first acute angle is configured as: when mounting portion is fastened and installed to the surface to be installed by bottom portion, shielding portion is not higher than the lowest incident plane of light emitting component and light receiving component, so that shielding portion prevents ambient light directly from light emitting component and light receiving component.

Description

Technical Field

[0001] This invention relates to the field of visibility detection equipment technology, and more specifically to a visibility detection system. Background Technology

[0002] As air pollution becomes increasingly severe, meteorological departments need to monitor air quality in real time, which requires the use of visibility detection devices. A visibility detection device is an instrument that measures the correlation coefficient of the atmosphere and calculates the distance that can be observed by the naked eye in the atmosphere according to empirical formulas.

[0003] Existing visibility detection devices include a light-emitting component and a light-receiving component. The light-emitting component emits light to illuminate the atmosphere near it. The light is refracted and reflected in the atmosphere and then received by the light-receiving component. After receiving the light, the visibility detection device can obtain the atmospheric visibility through an algorithm. However, in existing visibility detection devices, both the axis of the light-emitting component and the axis of the light-receiving component extend horizontally. Sunlight can directly illuminate the light-emitting and light-receiving components through the detection surface of the device, which reduces the detection accuracy. Summary of the Invention

[0004] The purpose of embodiments of the present invention is to provide a visibility detection system that can reduce the interference of sunlight on the visibility detection device, thereby reducing the impact of sunlight on the detection accuracy of the visibility detection device.

[0005] One embodiment of the present invention provides a visibility detection system, comprising:

[0006] A camera, the camera having an optical axis;

[0007] A visibility detection device, wherein the visibility detection device longitudinally supports the camera, and the top surface of the visibility detection device abuts against the bottom surface of the camera;

[0008] The visibility detection device includes:

[0009] The housing has a top surface that extends downward at an angle in the same direction as the optical axis, and the housing contains a light-emitting component and a light-receiving component.

[0010] The mounting portion is connected to the bottom surface of the housing and has a bottom extending in a horizontal direction;

[0011] The housing has a light-shielding member connected between the mounting part and the top surface. The light-shielding member includes a blocking part and a light-transmitting part disposed below the blocking part. The light-transmitting part is used to transmit the light-emitting component and the light-receiving component.

[0012] The blocking portion is formed as a plane that slopes upward in a direction opposite to the optical axis, and the blocking portion protrudes from the edge of the bottom in the direction of the optical axis;

[0013] The shielding part forms a first acute angle with the horizontal plane. The first acute angle is configured such that when the mounting part is fastened to the mounting surface through the bottom, the shielding part is not higher than the lowest incident plane of the light-emitting component and the light-receiving component, so that the shielding part prevents ambient light from directly hitting the light-emitting component and the light-receiving component.

[0014] In one embodiment, the first light-emitting component's central axis intersects the second light-emitting component's central axis, so that the light-emitting component's emitted area and the light-received component's received area overlap, and the visibility detection device acquires the air visibility within the overlapping area.

[0015] In one embodiment, the detection plane formed by the central axis of the first light ray and the central axis of the second light ray forms a second acute angle with the horizontal plane.

[0016] In one embodiment, the intersection of the plane containing the shielding portion and the detection plane is located within the housing.

[0017] In one embodiment, when the mounting portion is fastened to the surface to be mounted via the bottom, the second acute angle is configured such that the first acute angle approaches 0.

[0018] In one embodiment, the range of the first acute angle is -20° to 20°.

[0019] In one embodiment, the light-shielding member includes a front portion connecting the top surface and the blocking portion, the front portion being arranged parallel to the light-transmitting portion.

[0020] In one embodiment, the light-emitting component includes a first lens, and the light-receiving component includes a second lens.

[0021] When the mounting part is fastened to the surface to be mounted via the bottom, the blocking part is not higher than the bottom end of the first lens and / or the second lens.

[0022] In one embodiment, the overlapping area and the edge of the light-transmitting portion have a first gap in a direction opposite to the optical axis, so that the air in the overlapping area is not blocked by the housing.

[0023] In one embodiment, the camera has a camera housing with a recessed area at the bottom that is adapted to the top surface of the housing to longitudinally support the camera on the housing.

[0024] In one embodiment, the visibility detection device is powered by the camera's power supply;

[0025] The camera's processor motherboard is located on the side of the camera opposite to the visibility detection device.

[0026] As can be seen from the above technical solutions, this application provides a visibility detection system that achieves an installation method different from existing detection systems through the arrangement of the mounting part. This results in the visibility detection system having an inclined top surface of the housing and an inclined shielding part. By configuring the shielding part to be no higher than the lowest incident plane of the light-emitting component 200 and / or the light-receiving component 300, the visibility detection system can prevent ambient light from directly hitting the light-emitting component and the light-receiving component, thereby improving detection accuracy. Furthermore, by configuring the front side of the shielding part, raindrops can be prevented from interfering with the detection of the light-emitting component and the light-receiving component. In addition, by configuring the positions of the shielding part, the light-transmitting part, and the mounting part, the visibility detection system can achieve air circulation in the effective detection area, avoiding detection errors. Attached Figure Description

[0027] The following figures are for illustrative purposes only and do not limit the scope of the invention.

[0028] Figure 1 This is an exploded view of the casing disclosed in an embodiment of this application;

[0029] Figure 2 This is a first axonometric view of the visibility detection device disclosed in an embodiment of this application;

[0030] Figure 3 This is a side view of the visibility detection device disclosed in the embodiments of this application;

[0031] Figure 4 This is a second axonometric view of the visibility detection device disclosed in the embodiments of this application;

[0032] Figure 5 This is a bottom view of the visibility detection device disclosed in the embodiments of this application;

[0033] Figure 6 This is a first cross-sectional view of the visibility detection device disclosed in an embodiment of this application;

[0034] Figure 7 This is a second cross-sectional view of the visibility detection device disclosed in the embodiments of this application;

[0035] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0036] Figure 9 This is a schematic diagram of the assembly of the filler and the inner shell as disclosed in the embodiments of this application;

[0037] Figure 10 This is a partial structural diagram of the internal structure of the outer casing disclosed in an embodiment of this application;

[0038] Figure 11 This is a schematic diagram showing the installation of the visibility detection device disclosed in the embodiments of this application on different surfaces to be installed.

[0039] Figure 12 This is a schematic diagram of the assembly of the housing and the camera disclosed in an embodiment of this application;

[0040] Figure 13 This is a cross-sectional schematic diagram of the housing and camera disclosed in the embodiments of this application.

[0041] Figure 14 This is a cross-sectional schematic diagram of the shell disclosed in an embodiment of this application.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100-Housing, 101-Second pair of insertion parts, 110-Light-transmitting part, 121-Upper cover, 122-Lower cover, 131-Left side cover, 132-Right side cover, 133-Body, 140-Mounting part, 200-Light-emitting component, 210-Light-emitting element, 220-First lens, 300-Light-receiving component, 310-Light-receiving element, 320-Second lens, 400-Light-shielding element, 510-Effective detection area, 520-Detection plane, 600-Filling element, 610-First light channel, 620-Second light channel, 631-First pair of insertion parts, 710-First light-transmitting element, 720-Second light-transmitting element, 800-First wiper, 810-First brush head, 900-Second wiper, 910-Second brush head, 930-Surface to be installed, 940-Camera module. Detailed Implementation

[0044] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0046] The visibility detection device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0047] like Figures 1 to 13 As shown in the figure, this application discloses a visibility detection device, including a housing 100, within which a light-emitting component 200 and a light-receiving component 300 are disposed. The housing 100 is the basic component of the visibility detection device, providing a mounting base for components such as the light-emitting component 200 and the light-receiving component 300. The housing 100 has an accommodating space within which both the light-emitting component 200 and the light-receiving component 300 are disposed. Optionally, the housing 100 further includes a mounting portion 140, through which the visibility detection device can be mounted on a mounting surface 930. The bottom surface of the mounting portion 140 can be a plane, thus allowing the visibility detection device to be stably mounted on the mounting surface 930.

[0048] The housing 100 has a light-transmitting portion 110. The light-emitting component 200 and the light-receiving component 300 are both disposed opposite to the light-transmitting portion 110. That is, the illumination light emitted by the light-emitting component 200 can pass through the light-transmitting portion 110 and illuminate the atmosphere. After refraction and reflection in the atmosphere, the illumination light can pass through the light-transmitting portion 110 and be received by the light-receiving component 300. Optionally, the light-transmitting portion 110 can be an opening in the housing 100 or a light-transmitting component, such as transparent glass.

[0049] The housing 100 is also provided with a light-shielding member 400, and the light-shielding member 400 and the light-transmitting part 110 are located on the same side of the housing 100; the axis of the light-emitting component 200 is inclined relative to the horizontal plane, and in the first horizontal direction, the orthographic projection of the light-shielding member 400 can cover at least a portion of the orthographic projection of the light-emitting component 200; and / or, the axis of the light-receiving component 300 is inclined relative to the horizontal plane, and in the first horizontal direction, the orthographic projection of the light-shielding member 400 can cover at least a portion of the orthographic projection of the light-receiving component 300. Optionally, the light-shielding member 400 can be in the form of a brim structure, and the edge of the light-shielding member 400 away from the housing 100 can also have a downwardly extending bent portion. The light-shielding member 400 can not only block light, but also prevent rainwater from entering the housing 100 to a certain extent.

[0050] Wherein, the first horizontal direction is: the direction in which the vertical projection of the side of the housing 100 having the light-transmitting portion 110 extends to the vertical projection of the other side of the housing 100, where the other side of the housing 100 and the side of the housing 100 having the light-transmitting portion 110 are opposite sides of the housing, and the first horizontal direction can be... Figure 3 The direction extending from left to right.

[0051] Optionally, the light-emitting component 200 may include a light-emitting element 210, in which case the orthographic projection of the light-shielding element 400 covers at least a portion of the orthographic projection of the light-emitting element 210 in the first horizontal direction; further, the light-emitting component 200 may also include a first lens 220, in which case the orthographic projection of the light-shielding element 400 may cover at least a portion of the orthographic projection of the first lens 220 in the first horizontal direction. Similarly, the light-receiving component 300 may include a light-receiving element 310, in which case the orthographic projection of the light-shielding element 400 covers at least a portion of the orthographic projection of the light-receiving element 310 in the first horizontal direction; further, the light-emitting component 200 may also include a second lens 320, in which case the orthographic projection of the light-shielding element 400 may cover at least a portion of the orthographic projection of the second lens 320 in the first horizontal direction.

[0052] In this embodiment, the housing 100 has a light-transmitting portion 110. The light-emitting component 200 and the light-receiving component 300 are both disposed opposite to the light-transmitting portion 110. Irradiation light emitted by the light-emitting component 200 can pass through the light-transmitting portion 110 and irradiate the atmosphere. After refraction and reflection in the atmosphere, the irradiation light can pass through the light-transmitting portion 110 and be received by the light-receiving component 300. The housing 100 is also provided with a light-shielding member 400. In the first horizontal direction, the orthographic projection of the light-shielding member 400 can cover at least a portion of the light-emitting component 200. Thus, when sunlight irradiates the visibility detection device, the light-shielding member 400 can block at least a portion of the sunlight shining on the light-emitting component 200. In other words, compared to the prior art, this embodiment can reduce or even avoid interference from sunlight on the light-emitting component 200. Furthermore, since the axis of the light-emitting component 200 is inclined relative to the horizontal plane, the risk of the light-shielding member 400 blocking the illumination light emitted by the light-emitting component 200 can be avoided.

[0053] And / or, the orthographic projection of the light-shielding member 400 can cover at least a portion of the light-receiving component 300, so that when sunlight shines on the visibility detection device, the light-shielding member 400 can block at least a portion of the sunlight shining on the light-receiving component 300. In other words, compared with the prior art, this embodiment can reduce or even avoid the interference of sunlight on the light-receiving component 300, and since the axis of the light-receiving component 300 is inclined relative to the horizontal plane, the risk of the light-shielding member 400 blocking the light received by the light-receiving component 300 can be avoided.

[0054] Therefore, the embodiments of this application can reduce or even avoid interference from sunlight on the light-emitting component 200 and / or the light-receiving component 300, thereby reducing or even avoiding the impact of sunlight on the detection accuracy of the visibility detection device. Therefore, the embodiments of this application do not impose any restrictions on the installation orientation of the visibility detection device.

[0055] In the previous embodiment, if the height of the lowest edge of the orthographic projection of the light-shielding member 400 in the first horizontal direction is equal to the height of the lowest edge of the orthographic projection of the light-emitting component 200, then when the visibility detection device is installed on the mounting surface 930 parallel to the horizontal plane, the light-shielding member 400 can just block all the direct sunlight shining on the light-emitting component 200, thus avoiding interference from sunlight on the light-emitting component 200. Here, the incident angle of the direct sunlight is 0° to 180°. However, if the mounting surface 930 is inclined relative to the horizontal plane, ... Figure 11Taking the installation surface 930 as an example, it is equivalent to rotating the installation surface 930 clockwise by a preset angle relative to the horizontal plane. After the visibility detection device is installed on the installation surface 930, there is also this preset angle between the visibility detection device and the horizontal plane, which is equivalent to rotating the visibility detection device clockwise by a preset angle. Since the light-shielding member 400 can just block all the direct sunlight shining on the light-emitting component 200 when the visibility detection device is installed on the installation surface 930 which is parallel to the horizontal plane, the light-shielding member 400 can just block all the direct sunlight shining on the light-emitting component 200. Therefore, after rotating the visibility detection device clockwise by a preset angle, the light-shielding member 400 can no longer block all the direct sunlight shining on the light-emitting component 200, and this part of the sunlight will also interfere with the light-emitting component 200. Similarly, if the height of the lowest edge of the orthographic projection of the light-shielding member 400 is equal to the height of the lowest edge of the orthographic projection of the light-receiving component 300, and the mounting surface 930 is tilted relative to the horizontal plane, the light-shielding member 400 will not be able to block all the direct sunlight shining on the light-receiving component 300, and this part of the sunlight will also interfere with the light-receiving component 300.

[0056] In one alternative embodiment, please refer to Figure 3 In the first horizontal direction, the lowest edge of the orthographic projection of the light-shielding member 400 is lower than the lowest edge of the orthographic projection of the light-emitting component 200. In this embodiment, since the lowest edge of the orthographic projection of the light-shielding member 400 is lower than the lowest edge of the orthographic projection of the light-emitting component 200 in the first horizontal direction, even if the surface to be installed 930 is inclined relative to the horizontal plane, Figure 3 Taking the location as an example, after the visibility detection device is rotated clockwise by a preset angle, the lowest edge of the orthographic projection of the light-shielding component 400 will not be higher than the lowest edge of the orthographic projection of the light-emitting component 200. In this way, the light-shielding component 400 can block all direct sunlight shining on the light-emitting component 200, thereby preventing sunlight from interfering with the light-emitting component 200. It should be noted that the position of the lowest edge of the orthographic projection of the light-shielding component 400 can be determined based on the preset angle between the installation surface 930 and the horizontal plane, as long as it satisfies the requirement that after the visibility detection device is rotated clockwise by a preset angle, the lowest edge of the orthographic projection of the light-shielding component 400 is not higher than the lowest edge of the orthographic projection of the light-emitting component 200.

[0057] And / or, the lowest edge of the orthographic projection of the light-shielding member 400 is lower than the lowest edge of the orthographic projection of the light-receiving assembly 300. In this embodiment, since the lowest edge of the orthographic projection of the light-shielding member 400 is lower than the lowest edge of the orthographic projection of the light-receiving assembly 300 in the first horizontal direction, even if the surface to be mounted 930 is inclined relative to the horizontal plane, Figure 3Taking the location as an example, after the visibility detection device is rotated clockwise by a preset angle, the lowest edge of the orthographic projection of the light-shielding component 400 will not be higher than the lowest edge of the orthographic projection of the light-receiving component 300. In this way, the light-shielding component 400 can block all direct sunlight hitting the light-receiving component 300, thereby preventing sunlight from interfering with the light-receiving component 300. It should be noted that the position of the lowest edge of the orthographic projection of the light-shielding component 400 can be determined based on the preset angle between the installation surface 930 and the horizontal plane, as long as it satisfies the requirement that after the visibility detection device is rotated clockwise by a preset angle, the lowest edge of the orthographic projection of the light-shielding component 400 is not higher than the lowest edge of the orthographic projection of the light-receiving component 300.

[0058] Furthermore, the light-emitting component 200 has point A. In the second horizontal direction, the orthographic projection of point A is farther away from the orthographic projection of the light-shielding member 400 than the lowest point of the orthographic projection of the light-emitting component 200. That is, the straight-line distance between the orthographic projection of point A and the lowest point of the orthographic projection of the light-shielding member 400 is greater than the straight-line distance between the lowest point of the orthographic projection of the light-emitting component 200 and the lowest point of the orthographic projection of the light-shielding member 400. The straight line containing the orthographic projection of point A and the lowest point of the orthographic projection of the light-shielding member 400 is the first auxiliary line, and the angle between the first auxiliary line and the horizontal plane is 0-10°. The second horizontal direction is perpendicular to the first horizontal direction. In this embodiment, when the preset angle between the mounting surface 930 and the horizontal plane is 0-10°, ... Figure 3 Taking the location as an example, after the visibility detection device rotates clockwise by 0 to 10°, point A is the lowest point of the light-emitting component 200 in the second horizontal direction. At this time, the orthographic projection of the light-shielding member 400 can completely cover the orthographic projection of point A, thereby preventing sunlight from interfering with the light-emitting component 200. Therefore, this embodiment can ensure that when the preset angle between the installation surface 930 and the horizontal plane is 0 to 10°, sunlight cannot directly hit the light-emitting component 200. Optionally, the angle between the first auxiliary line and the horizontal plane can be 3°, 5°, 8°, 10°, etc., and can be selected according to the actual situation.

[0059] And / or, the light receiving component 300 has point B. In the second horizontal direction, the orthographic projection of point B is farther away from the orthographic projection of the light shield 400 than the lowest point of the orthographic projection of the light receiving component 300. That is, the straight-line distance between the orthographic projection of point B and the lowest point of the orthographic projection of the light shield 400 is greater than the straight-line distance between the lowest point of the orthographic projection of the light receiving component 300 and the lowest point of the orthographic projection of the light shield 400. The straight line containing the orthographic projection of point B and the lowest point of the orthographic projection of the light shield 400 is the second auxiliary line, and the angle between the second auxiliary line and the horizontal plane is 0 to 10°, wherein the second horizontal direction is perpendicular to the first horizontal direction. In this embodiment, when the preset angle between the mounting surface 930 and the horizontal plane is 0 to 10°, Figure 3 Taking the location as an example, after the visibility detection device rotates clockwise by 0 to 10°, point B is the lowest point of the light receiving component 300 in the second horizontal direction. At this time, the orthographic projection of the light-shielding member 400 can completely cover the orthographic projection of point B, thereby preventing sunlight from interfering with the light receiving component 300. Therefore, this embodiment can ensure that when the preset angle between the installation surface 930 and the horizontal plane is 0 to 10°, sunlight cannot directly hit the light receiving component 300. Optionally, the angle between the second auxiliary line and the horizontal plane can be 3°, 5°, 8°, 10°, etc., and can be selected according to the actual situation.

[0060] In one alternative embodiment, please refer to Figures 4 to 5 The overlapping area of ​​the light-emitting component 200 and the light-receiving component 300 is the effective detection area 510. The effective detection area 510 is located outside the housing 100. In the vertical direction, the orthographic projection of the effective detection area 510 is spaced apart from the orthographic projection of the side of the housing 100 with the light-transmitting portion 110. That is, a first gap L1 exists between the edge of the orthographic projection of the effective detection area 510 closest to the housing 100 and the edge of the orthographic projection of the side of the housing 100 with the light-transmitting portion 110 closest to the effective detection area 510. Optionally, the first gap L1 is greater than or equal to 2 mm to prevent a portion of the orthographic projection of the effective detection area 510 from coinciding with a portion of the orthographic projection of the side of the housing 100 with the light-transmitting portion 110 due to assembly or manufacturing errors of the visibility detection device.

[0061] In this embodiment, Figure 4 Taking the position as an example, the effective detection area 510 is located outside the housing 100, and in the vertical direction, there is a gap between the orthographic projection of the effective detection area 510 and the edge of the orthographic projection of the side of the housing 100 with the light-transmitting part 110 closest to the effective detection area 510. At this time, there are no structural members on the left, right, and lower sides of the effective detection area 510. That is to say, there are channels for air flow between the left, right, and lower sides of the effective detection area 510 and the effective detection area 510, and there are no structural members in these channels that obstruct air flow. This allows for better airflow through these channels, thereby improving the detection accuracy of the visibility detection device. Of course, in the vertical direction, a portion of the orthographic projection of the effective detection area 510 may also coincide with a portion of the orthographic projection of the side of the housing 100 with the light-transmitting part 110. This application does not limit the positional relationship between the effective detection area 510 and the side of the housing 100 with the light-transmitting part 110.

[0062] In one alternative embodiment, please refer to Figure 6In the second horizontal direction, the orthographic projection of the light-emitting component 200's light-emitting area and the orthographic projection of the light-shielding member 400 are spaced apart, wherein the second horizontal direction is perpendicular to the first horizontal direction. That is, the minimum distance L2 between the orthographic projection of the light-emitting component 200's light-emitting area and the orthographic projection of the light-shielding member 400 is greater than 0. This prevents the light-shielding member 400 from blocking the illumination light emitted by the light-emitting component 200, thereby improving the detection accuracy of the visibility detection device. Furthermore, L2 is greater than or equal to 2 mm to prevent the light-shielding member 400 from blocking the illumination light emitted by the light-emitting component 200 due to assembly errors or manufacturing errors in the visibility detection device.

[0063] And / or, the orthographic projection of the light-receiving area of ​​the light-receiving component 300 and the orthographic projection of the light-shielding member 400 are spaced apart, wherein the second horizontal direction is perpendicular to the first horizontal direction. That is, the minimum distance L4 between the orthographic projection of the light-receiving area of ​​the light-receiving component 300 and the orthographic projection of the light-shielding member 400 is greater than 0, thus preventing the light-shielding member 400 from blocking the light received by the light-receiving component 300, thereby improving the detection accuracy of the visibility detection device. Furthermore, L4 is greater than or equal to 2 mm to prevent the light-shielding member 400 from blocking the light received by the light-receiving component 300 due to assembly errors or manufacturing errors in the visibility detection device.

[0064] In one alternative embodiment, please refer to Figure 2 The light-emitting component 200 and the light-receiving component 300 are spaced apart along a second horizontal direction, which is perpendicular to the first horizontal direction. That is, in the second horizontal direction, the orthographic projection of the axis of the light-emitting component 200 is collinear with the orthographic projection of the axis of the light-receiving component 300. This makes the height of the light-emitting side of the light-emitting component 200 and the height of the light-receiving component 300 are equal, thereby improving the detection accuracy of the visibility detection device.

[0065] The angle between the detection plane 520, where the axes of the light-emitting component 200 and the light-receiving component 300 lie, and the horizontal plane is 40° to 50°. If the angle between the detection plane 520, where the axes of the light-emitting component 200 and the light-receiving component 300 lie, and the horizontal plane is less than 40°, then the height of the light-emitting side of the light-emitting component 200 and the light-receiving component 300 are both relatively high. In this case, at least a portion of the illumination light emitted by the light-emitting component 200 may be blocked by the light-shielding component 400, and at least a portion of the light that the light-receiving component 300 can receive may also be blocked by the light-shielding component 400, which will reduce the detection accuracy of the visibility detection device. If the angle between the axes of the light-emitting component 200 and the light-receiving component 300 lies, the horizontal plane is relatively high. If the angle between the detection plane 520, where the axis of the light receiving component 300 is located, and the horizontal plane is greater than 50°, then the height of the light-emitting side of the light-emitting component 200 and the height of the light-receiving component 300 are both low. To reduce or even avoid interference from sunlight on the light-emitting component 200 or the light receiving component 300, the light-shielding component 400 will extend downwards by a certain distance. At this time, the height of the space in the atmospheric flow area below the light-shielding component 400 will decrease, thus reducing atmospheric flow and reducing the detection accuracy of the visibility detection device. In this embodiment, the angle between the detection plane 520, where the axes of the light-emitting component 200 and the light receiving component 300 are located, and the horizontal plane is controlled between 40° and 50°. This ensures atmospheric flow while preventing the light emitted by the light-emitting component 200 and the light received by the light receiving component 300 from being blocked by the light-shielding component 400. Of course, this application does not limit the angle between the detection plane 520 containing the axis of the light-emitting component 200 and the axis of the light-receiving component 300 and the horizontal plane. The specific value of the angle can be selected according to the actual situation.

[0066] Optionally, in the first horizontal direction, the distance between the axis of the light-emitting component and the axis of the light-receiving component gradually increases. Further, the angle between the axis of the light-emitting component and the axis of the light-receiving component is 130° to 140°. The light-emitting component 200 includes a first lens 220, and the light-receiving component 300 includes a second lens 320. The distance between the center of the first lens 220 and the center of the second lens 320 is 230mm to 270mm, thus improving the detection accuracy of the visibility detection device.

[0067] In the above embodiments, to facilitate the assembly of the visibility detection device, the internal space of the housing 100 is typically increased. Thus, even after assembling the light-emitting component 200, the light-receiving component 300, the control component, and other components into the housing 100, there are still cavities within the internal space where no components are installed. In this case, if the light-transmitting part 110 is an opening in the housing 100, birds, rodents, and other predators can easily enter the cavities through the opening, potentially damaging the visibility detection device.

[0068] In one alternative embodiment, please refer to Figures 7 to 9 The housing 100 contains a filler 600, which has a first light channel 610 and a second light channel 620. The first light channel 610 is opposite to the light-emitting component 200, meaning that the illumination light emitted by the light-emitting component 200 can be directed to the light-transmitting part 110 through the first light channel 610. The second light channel 620 is opposite to the light-receiving component 300, meaning that the light that the light-receiving component 300 can receive can be received by the light-receiving component 310 through the light-transmitting part 110 and the second light channel 620. In this embodiment, the filler 600 can fill the cavity in the accommodating space where no components such as the light-emitting component 200, the light-receiving component 300, or the control component are installed, thereby preventing birds and rodents from entering the cavity through the opening and thus preventing birds and rodents from damaging the visibility detection device.

[0069] Optionally, the housing 100 may include an outer shell and an inner shell. A light-shielding member 400 is disposed on the outer shell, and a light-transmitting portion 110 includes a first light-transmitting portion and a second light-transmitting portion. The first light-transmitting portion is disposed on the outer shell, and the second light-transmitting portion is disposed on the inner shell. The outer shell contains the aforementioned receiving space, and the inner shell is disposed within the receiving space. Both the light-emitting component 200 and the light-receiving component 300 are disposed within the inner shell. In this embodiment, the housing 100 includes inner and outer protective shells, which strengthens the protection of the light-receiving component 300 and the light-emitting component 200, reducing the risk of damage to them. Furthermore, the use of inner and outer protective shells also reduces the risk of external light entering through gaps in the housing 100 and interfering with the light-emitting component 200 and the light-receiving component 300. Furthermore, the outer casing includes an upper cover 121 and a lower cover 122, and the inner casing includes a body 133 and a left cover 131 and a right cover 132 respectively covering both sides of the body 133. The body 133 has a first mounting space for installing the control component. The left cover 131 and the body 133 together form a second mounting space for installing the light-emitting component 200, and the right cover 132 and the body 133 together form a third mounting space for installing the light-receiving component 300. In this embodiment, the light-emitting component 200, the light-receiving component 300, and the control component are respectively located in three different mounting spaces, thereby preventing the control component from interfering with the light-emitting component 200 and the light-receiving component 300, and preventing the problem of the illumination light emitted by the light-emitting component 200 being received by the light-receiving component 300 and reducing the detection accuracy of the visibility detection device.

[0070] In an optional embodiment, a gap exists between the light-emitting area of ​​the light-emitting component 200 and the inner wall of the first light channel 610. This embodiment prevents the illumination light emitted by the light-emitting component 200 from being blocked by the filler 600, thereby improving the detection accuracy of the visibility detection device. Furthermore, the minimum distance L5 between the light-emitting area of ​​the light-emitting component 200 and the inner wall of the first light channel 610 is greater than or equal to 2 mm to prevent the first light channel 610 from blocking the illumination light emitted by the light-emitting component 200 due to assembly errors or manufacturing errors in the visibility detection device.

[0071] And / or, there is a gap between the light-receiving area of ​​the light-receiving component 300 and the inner wall of the second light channel 620. This embodiment can prevent the light received by the light-receiving component 300 from being blocked by the filler 600, thereby improving the detection accuracy of the visibility detection device. Furthermore, the minimum distance L3 between the light-receiving area of ​​the light-receiving component 300 and the second light channel 620 is greater than or equal to 2 mm to prevent the second light channel 620 from blocking the light received by the light-receiving component 300 due to assembly errors or manufacturing errors in the visibility detection device.

[0072] In the above embodiments, if the first light channel 610 blocks part of the illumination light emitted by the light-emitting component 200, and the inner walls of the first light channel 610 and the second light channel 620 can reflect light, then part of the light emitted by the light-emitting component 200 may be reflected into and interfere with the light receiving component 300 through the inner walls of the first light channel 610 and the second light channel 620, which will reduce the detection accuracy of the visibility detection device.

[0073] In one optional embodiment, the inner wall of the first light channel 610 is made of a light-absorbing material. In this embodiment, some of the light emitted by the light-emitting component 200 is absorbed by the inner wall of the first light channel 610 when it passes through it, thereby preventing this part of the light from entering the light receiving component 300 and reducing the detection accuracy of the visibility detection device.

[0074] And / or, the inner wall of the second light channel 620 is made of a light-absorbing material. When some of the light emitted by the light-emitting component 200 passes through the inner wall of the second light channel 620, it will be absorbed by the inner wall of the second light channel 620, thereby preventing this part of the light from entering the light receiving component 300 and reducing the detection accuracy of the visibility detection device.

[0075] In the above embodiments, after the filler 600 is assembled into the housing 100, a gap may exist between the filler 600 and the inner wall of the housing 100. Irradiation light emitted by the light-emitting component 200 may propagate in a straight line through this gap to the light-receiving component 300, thus reducing the detection accuracy of the visibility detection device. In an optional embodiment, please refer to... Figure 8 The filler 600 is provided with a first pair of insertion portions 631, the extension direction of the first pair of insertion portions 631 intersects the second horizontal direction, that is, the first pair of insertion portions 631 extends vertically or is inclined relative to the vertical direction. The inner wall surface of the housing 100 is provided with a second pair of insertion portions 101 corresponding to the first pair of insertion portions 631, the extension direction of the second pair of insertion portions 101 intersects the second horizontal direction, the second pair of insertion portions 101 extends vertically or is inclined relative to the vertical direction; in the second horizontal direction, at least a portion of the orthographic projection of the first pair of insertion portions 631 coincides with at least a portion of the orthographic projection of the second pair of insertion portions 101; wherein, the second horizontal direction is perpendicular to the first horizontal direction. In this embodiment, a first pair of insertion portions 631 and a second pair of insertion portions 101 are provided in the gap between the filler 600 and the inner wall surface of the housing 100. In the second horizontal direction, at least a portion of the orthographic projection of the first pair of insertion portions 631 coincides with at least a portion of the orthographic projection of the second pair of insertion portions 101. The height of the overlapping portion of the first pair of insertion portions 631 and the second pair of insertion portions 101 in the first horizontal direction can be greater than or equal to 2mm. At this time, a light propagation channel can be formed between the first pair of insertion portions 631 and the second pair of insertion portions 101. That is to say, the propagation path of the light in the first gap changes from a straight line to a broken line. Therefore, compared with the previous embodiment, the light propagation path in the gap between the filler 600 and the inner wall surface of the housing 100 in this embodiment is longer. This can reduce the light intensity when the illumination light emitted by the light-emitting component 200 propagates to the light-receiving component 300, thereby reducing the interference of the light-emitting component 200 on the light-receiving component 300 and improving the detection accuracy of the visibility detection device. Furthermore, the extension direction of the first pair of inserts 631 is parallel to the extension direction of the second pair of inserts 101, which reduces the distance between the first pair of inserts 631 and the second pair of inserts 101, increases the number of reflections of the irradiated light between the first pair of inserts 631 and the second pair of inserts 101, and further weakens the light intensity of the irradiated light.

[0076] Optionally, the first pair of insertion portions 631 may be a slot or a protrusion, and the second pair of insertion portions 101 may be a protrusion or a slot, in which case at least part of the protrusion is located in the slot; or, both the first pair of insertion portions 631 and the second pair of insertion portions 101 may be protrusions.

[0077] In the above embodiments, if the light-transmitting portion is an opening on the housing 100 or the light-transmitting portion is poorly sealed, rainwater can easily enter the housing 100 through the opening, thereby damaging the light-emitting component 200 and the light-receiving component 300. In an optional embodiment, please refer to... Figure 10 A first light-transmitting element 710 is provided between the light-emitting component 200 and the light-transmitting portion 110. Along the axial direction of the light-emitting component 200, the first light-transmitting element 710 completely covers the light-emitting component 200. A first heating element is provided on the first light-transmitting element 710. In this embodiment, the first light-transmitting element 710 between the light-emitting component 200 and the light-transmitting portion 110 prevents rainwater from entering the light-emitting component 200, thereby preventing rainwater from damaging the light-emitting component 200. The first heating element on the first light-transmitting element 710 heats and removes rainwater located on the first light-transmitting element 710, thereby preventing rainwater remaining on the first light-transmitting element 710 from altering the path of the irradiated light emitted by the light-emitting component 200. Furthermore, if the temperature difference within the housing 100 is large, fog may form on the first light-transmitting element 710; the first heating element can also remove the fog, preventing fog from interfering with the irradiated light.

[0078] And / or, a second light-transmitting element 720 is provided between the light-receiving component 300 and the light-transmitting portion 110. Along the axial direction of the light-receiving component 300, the second light-transmitting element 720 completely covers the light-receiving component 300, and a second heating element is provided on the second light-transmitting element 720. In this embodiment, the second light-transmitting element 720 between the light-receiving component 300 and the light-transmitting portion 110 prevents rainwater from entering the light-receiving component 300, thereby preventing rainwater from damaging the light-receiving component 300. The second heating element on the second light-transmitting element 720 heats and removes rainwater located on the second light-transmitting element 720, thereby preventing rainwater remaining on the second light-transmitting element 720 from altering the path of the light received by the light-receiving component 300. Furthermore, if the temperature difference within the housing 100 is large, fog may form on the second light-transmitting element 720. The second heating element can also remove the fog, preventing fog from interfering with the light received by the light-receiving component 300. Optionally, both the first heating element and the second heating element can be electric heating elements.

[0079] In the above embodiments, if there is heavy rainfall, the first heating element and the second heating element alone cannot quickly remove the rainwater from the first light-transmitting element 710 and the second light-transmitting element 720. In this case, a large amount of rainwater will accumulate on the first light-transmitting element 710 and the second light-transmitting element 720, thus altering the path of the illumination light emitted by the light-emitting component 200 and the path of the light received by the light-receiving component 300. In an optional embodiment, a first wiper 800 is provided inside the housing 100. The first brush head 810 of the first wiper 800 is in contact with the side of the first light-transmitting element 710 away from the light-emitting component 200. In this embodiment, when a large amount of rainwater accumulates on the first light-transmitting element 710, the first brush head 810 of the first wiper 800 can brush off the accumulated rainwater, thereby reducing the risk of rainwater altering the path of the illumination light emitted by the light-emitting component 200. Furthermore, the first wiper 800 also removes dust from the first light-transmitting element 710, thereby preventing dust from interfering with the illumination light.

[0080] And / or, a second wiper 900 is provided within the housing 100, and the second brush head 910 of the second wiper 900 is in contact with the side of the second light-transmitting element 720 that is away from the light-receiving assembly 300. In this embodiment, when a large amount of rainwater accumulates on the second light-transmitting element 720, the second brush head 910 of the second wiper 900 can brush off the rainwater accumulated on the second light-transmitting element 720, thereby reducing the risk that rainwater will change the path of the light received by the light-receiving assembly 300. In addition, the second wiper 900 also removes dust from the second light-transmitting element 720, thereby preventing dust from interfering with the light received by the light-receiving assembly 300.

[0081] Optionally, both the first brush head 810 and the second brush head 910 can be flexible brush heads. If large-particle mud stains adhere to the first light-transmitting element 710 and the second light-transmitting element 720, the flexible brush head, due to its lower rigidity, cannot completely remove the mud stains. This will interfere with the illumination light emitted by the light-emitting component 200 and the light received by the light-receiving component 300. In an optional embodiment, the first brush head 810 includes a first flexible brush head and a first rigid brush head, both of which are in contact with the side of the first light-transmitting element 710 away from the light-emitting component 200. In this embodiment, the first brush head 810 includes a first flexible brush head and a first rigid brush head. The first flexible brush head can clean the dust adhering to the first light-transmitting element 710, and because the first rigid brush head has higher rigidity, it can more thoroughly remove the mud stains adhering to the first light-transmitting element 710, thereby preventing the mud stains from interfering with the illumination light.

[0082] And / or, the second brush head 910 includes a second flexible brush head and a second rigid brush head, both of which are in contact with the side of the second light-transmitting element 720 away from the light-receiving component 300. In this embodiment, the second brush head 910 includes a second flexible brush head and a second rigid brush head. The second flexible brush head can clean dust adhering to the second light-transmitting element 720, and because the second rigid brush head has greater rigidity, it can more thoroughly remove mud adhering to the second light-transmitting element 720, thereby preventing mud from interfering with the illumination light.

[0083] In one alternative embodiment, please refer to Figure 12 and Figure 13 This application provides a visibility detection system, including a camera 940 and a... Figures 1 to 11 The visibility detection device shown includes a camera 940 longitudinally supported on the housing 100, allowing observation of the surrounding environment. Optionally, control components located within the housing 100 and the camera 940 are connected externally via cables, using the RS-485 communication protocol and power terminals for power supply and communication. The entire visibility detection device is powered via an external power supply connected to the camera 940's power cable. The camera 940's processor motherboard is located within the camera housing on the side of the camera 940 facing away from the visibility detection device, specifically on the top of the camera 940.

[0084] Combination Figure 2 and Figure 13 As can be seen, this application provides a visibility detection system, including:

[0085] Camera 940, Camera 940 has an optical axis L;

[0086] A visibility detection device, which longitudinally supports a camera 940, wherein the top surface 100a of the visibility detection device abuts against the bottom surface of the camera 940.

[0087] The visibility detection device includes:

[0088] The housing 100 has a top surface 100a that extends downward at an angle in the same direction as the optical axis L. The housing 100 is provided with a light-emitting component 200 and a light-receiving component 300.

[0089] Mounting part 140 is connected to the bottom surface of housing 100 and has a bottom 140a extending in a horizontal direction;

[0090] The housing 100 has a light-shielding member 400 connected between the mounting part 140 and the top surface 100a. The light-shielding member 400 includes a blocking part 410 and a light-transmitting part 110 disposed below the blocking part 410. The light-transmitting part 110 is used to transmit light-emitting component 200 and light-receiving component 300.

[0091] The blocking portion 410 is formed as a plane that is inclined upward in the direction opposite to the optical axis L, and the blocking portion 410 protrudes from the edge of the bottom 140a in the direction of the optical axis L.

[0092] like Figure 3 As shown, the shielding part 410 forms a first acute angle θ1 with the horizontal plane. The first acute angle θ1 is configured such that when the mounting part 140 is fastened to the mounting surface 930 via the bottom 140a (e.g., ...), the shielding part 410 forms a first acute angle θ1 with the horizontal plane. Figure 11 When (as shown), the blocking part 410 is not higher than the lowest incident plane of the light-emitting component 200 and the light-receiving component 300, so that the blocking part 410 prevents ambient light from directly shining on the light-emitting component 200 and the light-receiving component 300.

[0093] In this embodiment, the housing 100 can be configured to have a regular cuboid shape. When the housing 100 is fastened to the mounting surface 930 with its bottom surface, its top surface 100a will be parallel to the mounting surface 930. When the mounting surface 930 is a horizontal surface, the top surface 100a will also be set horizontally.

[0094] However, in order to shield ambient light and prevent it from directly shining on the light-emitting component and the light-receiving component, the visibility detection system in this embodiment adopts a different installation method and configuration than the existing ones.

[0095] Specifically, the mounting portion 140 is connected to the bottom surface of the housing 100 and is formed with a triangular cross-sectional shape, having a horizontally extending bottom portion 140a. The mounting portion 140 can be mounted to the surface 930 to be mounted by fitting the bottom portion 140a against it. Since the mounting portion 140 is connected to the bottom surface of the housing 100 and has a triangular shape, when the bottom portion 140a fits against the surface 930 to be mounted, the top surface 100a of the housing 100 is configured to extend downward at an angle. Since the camera 940 is longitudinally supported on the top surface 100a of the housing 100, the top surface 100a is configured to extend downward at an angle along the same direction as the optical axis L of the camera 940, rather than a conventional horizontal extension.

[0096] The housing 100 includes a light-shielding member 400 connecting the mounting portion 140 and the top surface 100a. The light-shielding member 400 includes a blocking portion 410 and a light-transmitting portion 110 disposed below the blocking portion 410. The light-emitting component 200 and the light-receiving component 300 are both disposed opposite to the light-transmitting portion 110. That is, the illumination light emitted by the light-emitting component 200 can pass through the light-transmitting portion 110 and illuminate the atmosphere. After refraction and reflection in the atmosphere, the illumination light can pass through the light-transmitting portion 110 and be received by the light-receiving component 300. Optionally, the light-transmitting portion 110 can be an opening in the housing 100 or a light-transmitting component, such as transparent glass.

[0097] In the direction of the optical axis L, the blocking portion 410 is located in front of the light-transmitting portion 110 and the mounting portion 140. Therefore, the orthographic projection of the rear edge of the blocking portion 410 (i.e., the side near the light-transmitting portion 110) in the vertical direction is located in front of the orthographic projection of the front edge of the light-transmitting portion 110 and the front edge of the bottom 140a in the vertical direction. Figure 3 In the view shown, the rear edge of the blocking portion 410 is located to the left of the front edge of the light-transmitting portion 110 and the front edge of the bottom portion 140a.

[0098] In the direction opposite to the optical axis L, the blocking part 410 forms an upward tilt angle and forms a first acute angle θ1 with the horizontal plane. The first acute angle θ1 is configured such that when the mounting part 140 is fastened to the mounting surface 930 through the bottom 140a, the blocking part 410 is not higher than the lowest incident plane of the light-emitting component 200 and the light-receiving component 300, so that the blocking part 410 prevents ambient light from directly shining on the light-emitting component 200 and the light-receiving component 300.

[0099] The lowest incident plane refers to the lower edge of the area of ​​light that can be incident on the light-emitting component 200 and the light-receiving component 300 in the vertical direction. Specifically, the light-emitting component 200 includes a first lens 220, and the light-receiving component 300 includes a second lens 320. The lowest incident plane is determined by the lowest edge of the first lens 220 and the second lens 320.

[0100] For example, the lowest incident plane is a plane tangent to the lowest point A of the first lens 220, and / or a plane tangent to the lowest point B of the second lens 320.

[0101] When the blocking part 410 is lower than the lowest incident plane of the light-emitting component 200 and the light-receiving component 300, the light-blocking member 400 can block all the sunlight directly hitting the light-emitting component 200 and the light-receiving component 300, thereby preventing sunlight from interfering with the light-emitting component 200 and the light-receiving component 300.

[0102] The direction opposite to the optical axis L can be defined as the first horizontal direction. Specifically, the first horizontal direction is the direction in which the vertical projection of the side of the housing 100 with the light-transmitting portion 110 extends to the vertical projection of the other side of the housing 100. Here, the other side of the housing 100 and the side of the housing 100 with the light-transmitting portion 110 are the two opposite sides of the housing. The first horizontal direction can be... Figure 3 The direction extending from left to right.

[0103] The top surface 100a of the housing 100 is perpendicular to the rear surface, and the bottom surface of the camera 940 abuts against the top surface 100a and the rear surface of the housing 100. Therefore, the housing of the camera 940 forms a concave region to fit the top surface 100a and the rear surface, thereby providing stable longitudinal support for the camera 940 from the housing 100. When the camera 940 is mounted on the housing 100, and the housing 100 is mounted on the mounting surface 930 with its mounting portion 140, the optical axis L of the camera 940 also forms a downward tilt angle to capture the surrounding area corresponding to the housing 100.

[0104] In a specific example, the first light-emitting component 200's central axis 230 intersects the second light-emitting component 300's central axis 330, so that the light-emitting component 200's emitting area and the light-receiving component 300's receiving area have an overlapping region 510. This overlapping region 510 is the effective detection area, and the visibility detection device acquires the air visibility within the overlapping region 510. The overlapping region 510 is located outside the housing 100.

[0105] The plane between the central axis 230 of the first light ray passing through the light-emitting component 200 and the central axis 330 of the second light ray passing through the light-receiving component 300 is defined as the detection plane 520. The detection plane 520 forms a second acute angle θ2 with the horizontal plane. This second acute angle θ2 is the reason why the blocking part 410 can block all the sunlight that is directly hitting the light-emitting component 200 and the light-receiving component 300.

[0106] Specifically, the second acute angle θ2 is configured to adjust the first acute angle θ1 so that the angle between the first acute angle θ1, i.e. the angle between the shielding part 410 and the horizontal plane, is adjusted to a direction close to 0°, so as to absorb the deviation of the customer's installation angle.

[0107] Specifically, when the mounting part 140 is fastened to the mounting surface 930 via the bottom 140a, the blocking part 410 is not higher than the bottom end of the first lens 220 and / or the second lens 320.

[0108] In one embodiment, in the first horizontal direction, the height of the lowest edge of the orthographic projection of the light-shielding member 400 is equal to the height of the lowest edge of the orthographic projection of the light-emitting component 200. At this time, the visibility detection device is installed on the installation surface 930 parallel to the horizontal plane, and the light-shielding member 400 can just block all the direct sunlight shining on the light-emitting component 200, so as to avoid the interference of sunlight on the light-emitting component 200. Here, the incident angle of direct sunlight is 0° to 180°.

[0109] The second acute angle θ2 is configured to be between 40° and 50°. If the second acute angle θ2 is less than 40°, the height of the light-emitting side of the light-emitting component 200 and the height of the light-receiving component 300 are both relatively high. In this case, at least a portion of the illumination light emitted by the light-emitting component 200 may be blocked by the light-shielding component 400, and at least a portion of the light that the light-receiving component 300 can receive may also be blocked by the light-shielding component 400, which will reduce the detection accuracy of the visibility detection device. If the second acute angle θ2 is greater than 50°, the height of the light-emitting side of the light-emitting component 200 and the height of the light-receiving component 300 are both relatively low. In order to reduce or even avoid the interference of sunlight on the light-emitting component 200 or the light-receiving component 300, the light-shielding component 400 will also be extended downward by a certain distance. At this time, the height of the space in the atmospheric flow area below the light-shielding component 400 will be reduced, which will reduce the atmospheric flow and thus reduce the detection accuracy of the visibility detection device. In this embodiment, the second acute angle θ2 between the detection plane 520, where the axis of the light-emitting component 200 and the axis of the light-receiving component 300 are located, and the horizontal plane is controlled at 40° to 50°. This ensures the airflow while preventing the light emitted by the light-emitting component 200 and the light that can be received by the light-receiving component 300 from being blocked by the light-shielding component 400.

[0110] like Figure 14 As shown, the intersection of the plane where the shielding part 410 is located and the detection plane 520 is located inside the housing 100.

[0111] To ensure the normal operation of the visibility detection system of this application, the structural design of its housing 100 must meet the following requirements: 1. Sunlight cannot directly shine on the lenses of the transmitting and receiving ends; 2. Rainwater is not allowed to drip onto the light-transmitting glass in front of the lens; 3. Air circulation is required in the effective detection area, that is, at least the sides and bottom of the effective detection area are not blocked by structural components.

[0112] The arrangement of the blocking portion 410, which is not higher than the lowest incident plane of the light-emitting component 200 and the light-receiving component 300, satisfies condition 1. Further, as... Figure 13 As shown, the light-shielding member 400 includes a front side portion 420 connecting the top surface 100a and the blocking portion 410, and the front side portion 420 is arranged parallel to the light-transmitting portion 110.

[0113] The front side 420 is arranged parallel to the light-transmitting part 110, and the blocking part 410 is formed as an upwardly inclined plane. Rainwater dripping from the front side 420 will not fall into the light-transmitting part 110 through the blocking part 410, thereby satisfying condition 2.

[0114] Furthermore, such as Figure 5 As shown, the overlapping area 510 of the light-emitting component 200 and the light-receiving component 300 is located outside the housing 100. In the vertical direction, the orthographic projection of the overlapping area 510 is spaced apart from the orthographic projection of the side of the housing 100 with the light-transmitting portion 110. That is, there is a first gap L1 between the edge of the orthographic projection of the overlapping area 510 closest to the housing 100 and the edge of the orthographic projection of the side of the housing 100 with the light-transmitting portion 110 closest to the overlapping area 510. Optionally, the first gap L1 is greater than or equal to 2 mm to prevent a part of the orthographic projection of the effective detection area 510 from coinciding with a part of the orthographic projection of the side of the housing 100 with the light-transmitting portion 110 due to assembly errors or manufacturing errors of the visibility detection device.

[0115] Therefore, there is no structural component of the shell 100 directly below the overlapping area 510. Thus, the effective detection area is not obstructed by the structural component, thereby satisfying condition 3.

[0116] As can be seen from the above technical solutions, this application provides a visibility detection system that achieves an installation method different from existing detection systems through the arrangement of the mounting part. This results in the visibility detection system having an inclined top surface of the housing and an inclined shielding part. By configuring the shielding part to be no higher than the lowest incident plane of the light-emitting component 200 and / or the light-receiving component 300, the visibility detection system can prevent ambient light from directly hitting the light-emitting component and the light-receiving component, thereby improving detection accuracy. Furthermore, by configuring the front side of the shielding part, raindrops can be prevented from interfering with the detection of the light-emitting component and the light-receiving component. In addition, by configuring the positions of the shielding part, the light-transmitting part, and the mounting part, the visibility detection system can achieve air circulation in the effective detection area, avoiding detection errors.

[0117] The foregoing embodiments of this application focus on describing the differences between various embodiments. As long as the different optimization features between embodiments are not contradictory, they can be combined to form better embodiments. For the sake of brevity, these differences will not be elaborated upon here. The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art, under the guidance of this application, can make many modifications without departing from the spirit and scope of the claims, all of which fall within the protection scope of this application.

Claims

1. A visibility detection system, characterized in that, include: A camera (940) having an optical axis (L); A visibility detection device, wherein the visibility detection device longitudinally supports the camera (940), wherein the top surface (100a) of the visibility detection device abuts against the bottom surface of the camera (940); The visibility detection device includes: A housing (100) has a top surface (100a) that extends downward at an angle in the same direction as the optical axis (L), and a light-emitting component (200) and a light-receiving component (300) are provided inside the housing (100). Mounting part (140) is connected to the bottom surface of the housing (100) and has a bottom (140a) extending in a horizontal direction; The housing (100) has a light-shielding member (400) connected between the mounting part (140) and the top surface (100a). The light-shielding member (400) includes a blocking part (410) and a light-transmitting part (110) disposed below the blocking part (410). The light-transmitting part (110) is used to transmit light through the light-emitting component (200) and the light-receiving component (300). The shielding portion (410) is formed as a plane that is inclined upward in a direction opposite to the optical axis (L), and the shielding portion (410) protrudes from the edge of the bottom (140a) in the direction of the optical axis (L). The shielding part (410) forms a first acute angle (θ1) with the horizontal plane. The first acute angle (θ1) is configured such that when the mounting part (140) is fastened to the mounting surface (930) through the bottom (140a), the shielding part (410) is not higher than the lowest incident plane of the light-emitting component (200) and the light-receiving component (300), so that the shielding part (410) prevents ambient light from directly hitting the light-emitting component (200) and the light-receiving component (300).

2. The visibility detection system according to claim 1, characterized in that, The first light-emitting component (200) has a first light-emitting axis (230) intersecting with the second light-emitting axis (330) of the light-receiving component (300), so that the light-emitting area that can be emitted by the light-emitting component (200) and the light-receiving area that can be received by the light-receiving component (300) have an overlapping area (510), and the visibility detection device acquires the air visibility in the overlapping area (510).

3. The visibility detection system according to claim 2, characterized in that, The detection plane (520) formed by the central axis of the first ray (230) and the central axis of the second ray (330) forms a second acute angle (θ2) with the horizontal plane.

4. The visibility detection system according to claim 3, characterized in that, The intersection of the plane where the shielding part (410) is located and the detection plane (520) is located inside the housing (100).

5. The visibility detection system according to claim 3, characterized in that, When the mounting part (140) is fastened to the surface to be mounted (930) via the bottom (140a), the second acute angle (θ2) is configured such that the first acute angle (θ1) approaches 0.

6. The visibility detection system according to claim 5, characterized in that, The range of the first acute angle (θ1) is -20° to 20°.

7. The visibility detection system according to claim 1, characterized in that, The light-shielding member (400) includes a front side portion (420) connecting the top surface (100a) and the blocking portion (410), and the front side portion (420) is arranged parallel to the light-transmitting portion (110).

8. The visibility detection system according to claim 1, characterized in that, The light-emitting component (200) includes a first lens (220), and the light-receiving component (300) includes a second lens (320). When the mounting part (140) is fastened to the surface to be mounted (930) via the bottom (140a), the blocking part (410) is not higher than the bottom end of the first lens (220) and / or the second lens (320).

9. The visibility detection system according to claim 2, characterized in that, The overlapping area (510) and the edge of the light-transmitting part (110) have a first gap (L1) in a direction opposite to the optical axis (L) so that the air in the overlapping area (510) is not blocked by the housing (100).

10. The visibility detection system according to claim 1, characterized in that, The camera (940) has a camera housing with a recessed area at the bottom, the recessed area being adapted to the top surface (100a) of the housing (100) so that the camera (940) is longitudinally supported on the housing (100).

Images