CN114842621A

CN114842621A - Sand-dust weather early warning method

Info

Publication number: CN114842621A
Application number: CN202210614026.XA
Authority: CN
Inventors: 丁谊; 宋海岩; 孟倩文; 范永余
Original assignee: Beijing Wanyun Technology Development Co ltd
Current assignee: Beijing Wanyun Technology Development Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-08-02

Abstract

The invention relates to the technical field of weather early warning, in particular to a sand weather early warning method. The method comprises the following steps: acquiring outdoor image data of a test site in an area affected by sand weather; setting reference image data, wherein the reference image data comprises a plurality of reference pictures, and the reference pictures are acquired in a test site in a sand-free weather; comparing the outdoor image data with the reference image data to confirm the visual influence degree of the dust weather on the test site; and making out resident trip early warning according to the visual influence degree and external meteorological data. The early warning system can help determine the boundary of the actual influence range of the sand-dust weather, is convenient for giving out more accurate early warning, and has positive auxiliary effects on improving the early warning precision and reducing the influence degree of the sand-dust weather on normal activities.

Description

Sand-dust weather early warning method

Technical Field

The invention relates to the technical field of weather early warning, in particular to a sand weather early warning method.

Background

The traditional early warning means for the sand-dust weather mainly predicts the overall situation and the development trend of the sand-dust weather and has certain globality and macroscopicity. The accuracy is not particularly high for actual travel indication and activity early warning in various places, and is even lower especially for areas on the boundary of sand-dust weather influence range.

In view of this, the present application is specifically made.

Disclosure of Invention

The invention aims to provide a sand weather early warning method which can help determine the boundary of the actual influence range of sand weather, is convenient to give out more accurate early warning, and has positive auxiliary effects on improving early warning accuracy and reducing the influence degree of the sand weather on normal activities.

The embodiment of the invention is realized by the following steps:

a sand weather early warning method comprises the following steps:

outdoor image data of a test site is acquired in an area affected by sand weather.

And setting reference image data, wherein the reference image data comprises a plurality of reference pictures, and the reference pictures are acquired in the sand-dust-free weather of a test site.

And comparing the outdoor image data with the reference image data to confirm the visual influence degree of the dust weather on the test site.

And making out resident trip early warning according to the visual influence degree and external meteorological data.

Further, the outdoor image data is obtained by acquiring an image of the target object at the test site, the target objects are plural and distributed in different directions of the test site, and a distance between each target object and the test site is greater than or equal to 200 m.

Furthermore, a plurality of targets are arranged in different testing directions of the testing site, and the distances between the plurality of targets and the testing site in the same testing direction are different.

Further, for windy weather, the test directions include at least: the direction of the incoming wind, the direction opposite to the direction of the incoming wind, and the direction perpendicular to the direction of the incoming wind.

Further, an image acquisition device is arranged at the test site to acquire outdoor image data.

Wherein, image acquisition device includes: base, stand, rotor, connecting seat, locking piece, dwang and wind vane.

The stand is installed in the base, and the rotor rotationally cooperates in the stand, and the rotor is provided with the camera lens that is used for image acquisition. The orientation of the lens is the same as the orientation of the wind vane.

The wind vane is rotationally installed in the top of stand, wind vane and dwang fixed connection, and the dwang sets up and rotationally cooperates in the stand along the axial of stand, the bottom and the connecting seat fixed connection of dwang, and the connecting seat rotationally cooperates in the stand.

A locking member is engaged with the rotating lever for selectively locking the rotating lever to restrict rotation thereof.

The rotor and the cooperation of connecting seat, the driver is installed to the connecting seat, and the driver is used for driving the relative connecting seat of rotor and rotates.

Further, the process of acquiring outdoor image data by using the image acquisition device comprises:

in the windy state, the locking of the locking piece to the rotating rod is released, and the wind direction is positioned by the wind vane so that the lens faces the incoming direction of the wind.

The locking piece is used for locking the rotating rod, and outdoor image data in the incoming wind direction are acquired through the lens.

Utilize the driver drive rotor to rotate for the connecting seat, respectively with the opposite direction of incoming wind direction, with the direction of incoming wind direction looks vertically direction acquireing outdoor image data.

Furtherly, the stand includes first cylinder and the second cylinder that coaxial and interval set up, and second cylinder top is located to first cylinder, through spliced pole fixed connection between first cylinder and the second cylinder, and a plurality of spliced poles distribute along the circumference of first cylinder and second cylinder.

The rotor is rotationally arranged between the first cylinder and the second cylinder, and the rotor is positioned in a space surrounded by the connecting columns.

The first column body is provided with an inner cavity extending from the top to the bottom, and the rotating rod and the connecting seat are both rotatably arranged in the inner cavity.

Furthermore, the rotor has first cavity, second cavity and the third cavity that sets up at interval in proper order, and the second cavity sets up along the radial of rotor, and the length direction of second cavity is parallel with the length direction of wind vane. In the direction of the wind vane, the front end wall of the second cavity is provided with an air inlet, and the rear end wall of the second cavity is provided with an air outlet.

The lens is arranged in the second cavity and faces the air inlet. A control assembly used for controlling the opening and closing of the air inlet and the air outlet is arranged in the first cavity. And a blowing assembly is arranged in the third cavity, a blowing port of the blowing assembly extends to the second cavity and is arranged close to the air inlet, and the blowing port is arranged towards the air outlet.

Further, the control assembly includes: servo motor and control loop.

The control ring is concentrically arranged with the rotor and is rotatably fitted to the rotor. The control ring penetrates through the first cavity, extends to one end, close to the air inlet, of the second cavity, continues to penetrate through the third cavity, continues to penetrate through one end, close to the air outlet, of the second cavity, and finally penetrates back to the first cavity.

The inner ring wall of the control ring is provided with a rack, and the servo motor is in transmission fit with the rack and used for controlling the control ring to rotate.

The control ring is provided with a first opening matched with the air inlet and a second opening matched with the air outlet. The control loop includes a first operating state, a second operating state, and a third operating state. When the control ring is in the first working state, the air inlet and the air outlet are both closed by the control ring. When the control ring is in the second working state, the second opening is aligned with the air outlet, the air outlet is opened, and the air inlet is closed. When the control ring is in the third working state, the second opening is aligned with the air outlet, the first opening is aligned with the air inlet, and the air inlet and the air outlet are both opened.

Further, machine learning is carried out on the reference image data as a data set so as to establish a reference image data model when the test site is in sand-free weather. And comparing the outdoor image data with the reference image data model to confirm the visual influence degree of the dust weather on the test site.

The technical scheme of the embodiment of the invention has the beneficial effects that:

the early warning method for the sand weather provided by the embodiment of the invention can help to determine the boundary of the actual influence range of the sand weather, is convenient to give out more accurate early warning, and has positive auxiliary effects on improving the early warning accuracy and reducing the influence degree of the sand weather on normal activities.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic flow diagram of a sand weather early warning method according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an image acquisition device used in the sand weather early warning method according to the embodiment of the present invention;

fig. 3 is a schematic diagram of an internal structure of an image acquisition device used in the sand weather early warning method according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a control loop of an image acquisition device used in the sand-dust weather early warning method according to the embodiment of the present invention in a first working state;

fig. 5 is a schematic structural diagram of a first view angle of a control loop of an image acquisition device used in the sand-dust weather early warning method according to the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second view angle of a control loop of an image acquisition device used in the sand-dust weather early warning method according to the embodiment of the present invention;

fig. 7 is a schematic structural diagram (when a control ring is not shown) when an air inlet of an image acquisition device used in the sand weather early warning method provided by the embodiment of the present invention is opened;

fig. 8 is a schematic structural diagram (when a control loop is shown) when an air inlet of an image acquisition device used in the sand weather early warning method provided by the embodiment of the present invention is opened;

fig. 9 is a schematic structural diagram of a control loop of an image acquisition device used in the sand-dust weather early warning method according to the embodiment of the present invention in a second working state;

fig. 10 is a schematic structural diagram of a control loop of an image capturing device used in the sand-dust weather early warning method according to the embodiment of the present invention in a third operating state.

Description of reference numerals:

an image acquisition device 1000; a base 100; a column 200; a first cylinder 210; a second cylinder 220; a connecting post 230; a rotating body 300; a first cavity 310; a servo motor 311; a control loop 312; the first opening 312 a; a second opening 312 b; an arc-shaped connecting rod 312 c; a second cavity 320; an air inlet 321; an air outlet 322; a third cavity 330; a blowing assembly 331; an air blowing port 332; a lens 400; a connecting socket 500; a driver 510; a locking member 600; rotating the rod 700; a wind vane 800.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "parallel," "perpendicular," and the like do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined. For example, "parallel" merely means that the directions are more parallel relative to "perpendicular," and does not mean that the structures are necessarily perfectly parallel, but may be slightly tilted.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

The terms "substantially", "essentially", and the like are intended to indicate that the relative terms are not required to be absolutely exact, but may have some deviation. For example: "substantially equal" does not mean absolute equality, but it is difficult to achieve absolute equality in actual production and operation, and some deviation generally exists. Thus, in addition to absolute equality, "substantially equal" also includes the above-described case where there is some deviation. In this case, unless otherwise specified, terms such as "substantially", and the like are used in a similar manner to those described above.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1, the present embodiment provides a sand weather warning method, which includes:

And comparing the outdoor image data with the reference image data to confirm the visual influence degree of the dust weather on the test site. And

It should be noted that the sand weather early warning method is suitable for monitoring and early warning a sand-prone area. Wherein, the test site can be flexibly selected according to the actual situation. In order to obtain more accurate warning results, generally, the more the number of test sites is, the better the distribution is, the more uniformly the test sites are in the area.

Both the outdoor image data and the reference image data may take the form of pictures.

Specifically, the outdoor image data is obtained by acquiring an image of a target object at a test site, the target objects are multiple and distributed in different directions of the test site, and a distance between each target object and the test site is greater than or equal to 200 m.

The distance between the plurality of target objects and the test site in the same test direction is different.

For windy weather, the test directions include at least: the direction of the incoming wind, the direction opposite to the direction of the incoming wind, and the direction perpendicular to the direction of the incoming wind.

By the means, the collected outdoor image data can be more comprehensive, and the accuracy of results is improved. Especially in the direction of the incoming wind, the direction opposite to the incoming wind direction, the direction perpendicular to the incoming wind direction and the like, the method is an important index for considering the influence degree of the sand and dust weather.

In addition, in other embodiments of the present invention, machine learning may be performed on the reference image data as a data set to establish a reference image data model in a test site in a dustless weather. And comparing the outdoor image data with the reference image data model to confirm the visual influence degree of the dust weather on the test site. This may further improve the accuracy of the results.

The reference picture covers the image data of different time periods in all directions (full view angles) of the test site, so that the result accuracy can be further improved, and the interference of other factors can be effectively eliminated.

Referring to fig. 2 to 10, in some embodiments of the present invention, an image acquisition device 1000 may be further disposed at the test site to acquire outdoor image data.

Wherein, image acquisition apparatus 1000 includes: the base 100, the pillar 200, the rotator 300, the coupling seat 500, the locking member 600, the rotation lever 700, and the wind vane 800.

The base 100 may be installed on the ground, but is not limited thereto.

The post 200 is mounted to the base 100 and disposed perpendicular to the base 100, the rotating body 300 is rotatably coupled to the post 200, and the rotating body 300 is provided with a lens 400 for image capturing. The orientation of the lens 400 is the same as the orientation of the wind vane 800.

The wind vane 800 is rotatably installed on the top of the upright post 200, the wind vane 800 is fixedly connected with the rotation rod 700, the rotation rod 700 is axially arranged along the upright post 200 and is rotatably fitted to the upright post 200, the bottom end of the rotation rod 700 is fixedly connected with the connection seat 500, and the connection seat 500 is rotatably fitted to the upright post 200.

The locking member 600 is engaged with the rotating lever 700 for selectively locking the rotating lever 700 to restrict its rotation. The term "selectively locked" in this application means that the lock may be locked when it is desired to lock and unlocked when it is not desired to lock. The locking member 600 includes, but is not limited to, a spindle locking mechanism.

The rotating body 300 is fitted with the coupling socket 500, and the driver 510 is installed on the coupling socket 500, and the driver 510 is used for driving the rotating body 300 to rotate relative to the coupling socket 500. When the driver 510 is not operated, the rotation of the rotating body 300 relative to the connecting seat 500 can be limited. The driver 510 may employ a servo motor fitted with a brake of a power-off protection type, but is not limited thereto.

Specifically, the column 200 includes a first column 210 and a second column 220 that are coaxial and are arranged at an interval, the first column 210 is arranged above the second column 220, the first column 210 and the second column 220 are fixedly connected through a connecting column 230, the connecting columns 230 are distributed along the circumferential direction of the first column 210 and the second column 220, and the connecting columns 230 are arranged near the edges of the first column 210 and the second column 220.

The rotating body 300 is rotatably disposed between the first cylinder 210 and the second cylinder 220, and the rotating body 300 is located in a space surrounded by the connecting posts 230.

The first cylinder 210 has an inner cavity extending from the top to the bottom thereof, and the rotation rod 700 and the connection seat 500 are rotatably disposed in the inner cavity thereof. At the top of the first cylinder 210, the inner diameter of the top end of the inner cavity is matched with the diameter of the rotating rod 700. The locking member 600 is also disposed within the interior of the first post 210.

Further, the rotating body 300 has a first cavity 310, a second cavity 320 and a third cavity 330 which are sequentially arranged at intervals, and the first cavity 310 and the third cavity 330 are respectively arranged at two sides of the second cavity 320. The second chamber 320 is disposed in a radial direction of the rotating body 300, and a length direction of the second chamber 320 is parallel to a length direction of the wind vane 800. In the direction of the wind vane 800, the front end wall of the second cavity 320 is provided with an air inlet 321, and the rear end wall of the second cavity 320 is provided with an air outlet 322.

The lens 400 is disposed in the second cavity 320 and faces the air inlet 321. A control component for controlling the opening and closing of the air inlet 321 and the air outlet 322 is disposed in the first cavity 310. The air blowing assembly 331 is disposed in the third cavity 330, an air blowing port 332 of the air blowing assembly 331 extends to the second cavity 320 and is disposed near the air inlet 321, and the air blowing port 332 is disposed toward the air outlet 322.

Wherein, the control assembly includes: a servo motor 311 and a control loop 312.

The control ring 312 is concentrically disposed with the rotating body 300, and the control ring 312 is rotatably coupled to the rotating body 300.

Among these, the control loop 312 can be regarded as: the first cavity 310 penetrates through the second cavity 320 to an end of the second cavity 320 close to the air inlet 321, continues to penetrate through the third cavity 330 to an end of the third cavity 330 close to the air inlet 321, continues to penetrate through the second cavity 320 from the other end of the third cavity 330 to an end of the second cavity 320 close to the air outlet 322, and finally penetrates back to the first cavity 310 to form an annular structure. In this embodiment, the rotor 300 has a cylindrical shape, and the control ring 312 has an annular shape.

The inner ring wall of the control ring 312 is provided with a rack, and the servo motor 311 is in transmission fit with the rack to control the control ring 312 to rotate.

The control ring 312 defines a first opening 312a adapted to the air inlet 321 and a second opening 312b adapted to the air outlet 322.

The control loop 312 includes a first operating state, a second operating state, and a third operating state. When the control ring 312 is in the first working state, both the air inlet 321 and the air outlet 322 are closed by the control ring 312. When the control ring 312 is in the second working state, the second opening 312b is aligned with the air outlet 322, the air outlet 322 is opened, and the air inlet 321 is closed. When the control ring 312 is in the third working state, the second opening 312b is aligned with the air outlet 322, the first opening 312a is aligned with the air inlet 321, and both the air inlet 321 and the air outlet 322 are opened.

Wherein, along the circumferential direction of the control ring 312, the length of the first opening 312a is smaller than the length of the second opening 312 b. In the present embodiment, the length of the first opening 312a is half of the length of the second opening 312b in the circumferential direction of the control ring 312. The air inlet 321 and the air outlet 322 have the same size.

In this embodiment, the first opening 312a and the second opening 312b can be regarded as a control ring 312 that is cut off, and then the two ends of the cut-off portion are connected by an arc-shaped connecting rod 312 c. The curvature of the arc connection bar 312c is the same as that of the control ring 312, and the arc connection bar 312c is located at the middle of the cutoff portion.

The process of acquiring outdoor image data by using the image acquisition apparatus 1000 includes, but is not limited to:

in the windy state, the lock of the rotary lever 700 by the lock member 600 is released, and the wind vane 800 positions the wind direction so that the lens 400 faces the incoming wind.

The rotating lever 700 is locked by the lock member 600, and outdoor image data in the direction of the incoming wind is acquired through the lens 400.

The servo motor 311 is used to drive the control loop 312, so that the control loop 312 sequentially enters a second working state and a third working state from the first working state, and after entering the third working state, the lens 400 is used to collect outdoor image data. At this time, since the air inlet 321 and the air outlet 322 are both opened, the dust is not easily deposited in the second chamber 320.

After the collection is completed, the control ring 312 is switched to the second working state, the air inlet 321 is closed, and no new dust enters the second cavity 320. After the remaining dust and sand in the second cavity 320 is blown out from the air outlet 322 by the air blowing assembly 331, the control ring 312 is switched to the first working state, and the collection in one direction is completed.

At this time, the driver 510 is used to drive the rotation body 300 to rotate relative to the connection seat 500, so as to collect other directions.

For the acquisition in the direction perpendicular to the incoming wind direction, the above-described manner may be referred to.

For the collection in the direction opposite to the incoming wind direction, the control ring 312 may not be switched to the second working state immediately after the lens 400 collects data, but the locking member 600 releases the locking of the rotating rod 700, the lens 400 is made to face the incoming wind direction again by the wind vane 800, and at this time, the air inlet 321 and the air outlet 322 are closed in the above manner.

In summary, the early warning method for the sand weather provided by the embodiment of the invention can help determine the boundary of the actual influence range of the sand weather, is convenient to give out early warning more accurately, and has positive auxiliary effects on improving the early warning accuracy and reducing the influence degree of the sand weather on normal activities.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sand weather early warning method is characterized by comprising the following steps:

acquiring outdoor image data of a test site in an area affected by sand weather;

setting reference image data, wherein the reference image data comprises a plurality of reference pictures, and the reference pictures are acquired in the sand-dust-free weather of the test site;

comparing the outdoor image data with the reference image data to confirm the visual influence degree of the dust weather on the test site;

and making out resident trip early warning according to the visual influence degree and the external meteorological data.

2. The sand-dust weather warning method as claimed in claim 1, wherein the outdoor image data is obtained by obtaining images of a plurality of targets distributed in different directions of the test site at the test site, and a distance between each target and the test site is greater than or equal to 200 m.

3. A sand-dust weather warning method as claimed in claim 2, wherein a plurality of the targets are provided in different test directions of the test site, and distances between the plurality of targets and the test site in the same test direction are different.

4. A sand weather warning method as claimed in claim 3, wherein for windy weather, the test direction includes at least: the direction of the incoming wind, the direction opposite to the direction of the incoming wind, and the direction perpendicular to the direction of the incoming wind.

5. The sand-dust weather warning method as claimed in claim 4, wherein an image acquisition device is arranged at the test site to acquire the outdoor image data;

wherein, the image acquisition device includes: the wind vane comprises a base, a stand column, a rotating body, a connecting seat, a locking piece, a rotating rod and a wind vane;

the upright post is arranged on the base, the rotating body is rotatably matched with the upright post, and the rotating body is provided with a lens for image acquisition; the orientation of the lens is the same as the direction of the wind vane;

the wind vane is rotatably arranged at the top of the upright post and is fixedly connected with the rotating rod, the rotating rod is arranged along the axial direction of the upright post and is rotatably matched with the upright post, the bottom end of the rotating rod is fixedly connected with the connecting seat, and the connecting seat is rotatably matched with the upright post;

the locking piece is matched with the rotating rod and used for selectively locking the rotating rod I to limit the rotation of the rotating rod I;

the rotor with the connecting seat cooperation, the driver is installed to the connecting seat, the driver is used for the drive the rotor is relative the connecting seat rotates.

6. The sand-dust weather warning method as claimed in claim 5, wherein the process of acquiring the outdoor image data by the image acquisition device comprises:

in a windy state, the locking of the locking piece on the rotating rod is released, and the wind vane is used for positioning the wind direction to enable the lens to face the incoming direction of the wind;

the rotating rod is locked by the locking piece, and the outdoor image data in the incoming wind direction are acquired through the lens;

utilize the driver drive the rotor rotates relatively the connecting seat, respectively with the opposite direction of coming the wind direction, with come the wind direction looks vertically direction and acquire outdoor image data.

7. A sand and dust weather early warning method as claimed in claim 5, wherein the upright column comprises a first column body and a second column body which are coaxially arranged at intervals, the first column body is arranged above the second column body, the first column body and the second column body are fixedly connected through connecting columns, and a plurality of connecting columns are distributed along the circumferential direction of the first column body and the second column body;

the rotating body is rotatably arranged between the first cylinder and the second cylinder and is positioned in a space surrounded by the connecting columns;

the first cylinder has an inner cavity extending from the top to the bottom thereof, and the rotating rod and the connecting seat are both rotatably arranged in the inner cavity.

8. A sand and dust weather early warning method as claimed in claim 5, wherein the rotor has a first cavity, a second cavity and a third cavity which are sequentially arranged at intervals, the second cavity is arranged along the radial direction of the rotor, and the length direction of the second cavity is parallel to the length direction of the wind vane; in the direction of the wind vane, the front end wall of the second cavity is provided with an air inlet, and the rear end wall of the second cavity is provided with an air outlet;

the lens is arranged in the second cavity and faces the air inlet; a control assembly for controlling the opening and closing of the air inlet and the air outlet is arranged in the first cavity; and a blowing assembly is arranged in the third cavity, a blowing port of the blowing assembly extends to the second cavity and is close to the air inlet, and the blowing port faces the air outlet.

9. The method of sand weather warning as claimed in claim 8, wherein the control assembly comprises: a servo motor and a control loop;

the control ring is arranged concentrically with the rotating body and can be rotationally matched with the rotating body; the control ring penetrates through the first cavity, extends to one end, close to the air inlet, of the second cavity, continues to penetrate through the third cavity, continues to penetrate through one end, close to the air outlet, of the second cavity, and finally penetrates back to the first cavity;

the inner ring wall of the control ring is provided with a rack, and the servo motor is in transmission fit with the rack and used for controlling the control ring to rotate;

the control ring is provided with a first opening matched with the air inlet and a second opening matched with the air outlet; the control loop comprises a first working state, a second working state and a third working state; when the control ring is in the first working state, the air inlet and the air outlet are both sealed by the control ring; when the control ring is in the second working state, the second opening is aligned with the air outlet, the air outlet is opened, and the air inlet is closed; when the control ring is in the third working state, the second opening is aligned with the air outlet, the first opening is aligned with the air inlet, and the air inlet and the air outlet are both opened.

10. The method according to claim 1, wherein the reference image data is used as a data set for machine learning to establish a reference image data model of the test site in the non-dust weather; and comparing the outdoor image data with the reference image data model to confirm the visual influence degree of the dust weather on the test site.