Fog screen projection control method and system

Abstract

The invention relates to a fog screen projection control method and system, and relates to the field of fog screen projection, and the method comprises the steps: 100, collecting the driving parameters of a vehicle; 101, responding to the driving parameters to judge whether the vehicle breaks down or not; 102, when the vehicle breaks down, a preset unmanned aerial vehicle is controlled to collect a road condition image; step 103, identifying the number of vehicles from the road condition image; 104, determining a projection magnification in response to the number of the vehicles; step 105, determining a warning height in response to the projection magnification; and 106, controlling a preset unmanned aerial vehicle to fly up based on the warning height, and controlling the preset unmanned aerial vehicle to emit a fog screen and project a fault warning based on the projection magnification. The vehicle-mounted unmanned aerial vehicle has the advantages that the use convenience of the vehicle-mounted unmanned aerial vehicle is improved, and warning within different influence ranges can be selected according to different road conditions.

Description

Technical Field

[0001] The present invention relates to the field of fog screen projection, and in particular to a fog screen projection control method and system. Background Art

[0002] Fog screen projection refers to an advanced projection technology that uses tiny water droplets produced by an atomization system to form a fog screen, and then projects the image onto the fog screen, creating a three-dimensional and transparent visual effect.

[0003] In existing technologies, drones are usually carried on vehicles. When encountering emergencies such as vehicle breakdowns, traffic accidents, etc. that require rescue, the vehicle-mounted drone can send out specific distress signals or indicators, such as flashing lights, arrows pointing in a safe direction, etc., to facilitate rescue personnel to quickly locate the vehicle's position, and can also provide clear instructions to other vehicles and pedestrians to avoid secondary accidents.

[0004] The range of the distress signals or signs that can be sent by vehicle-mounted drones is limited. When traffic is congested, it is easy for vehicles farther away to not be warned in time, further exacerbating the traffic congestion. Summary of the Invention

[0005] In order to improve the convenience of using a vehicle-mounted drone and select warnings with different impact ranges for different road conditions, the present invention provides a fog screen projection control method and system.

[0006] In a first aspect, the present invention provides a fog screen projection control method, which adopts the following technical solution: A fog screen projection control method, comprising: Step 100: Collecting vehicle driving parameters; Step 101: determining whether a vehicle failure occurs in response to the driving parameters; Step 102: When a vehicle breaks down, a preset drone is controlled to collect road condition images; Step 103: Identify the number of vehicles from the road condition image; Step 104: determining a projection magnification in response to the number of vehicles; Step 105: determining a warning height in response to the projection magnification; Step 106: Control a preset drone to ascend based on the warning altitude, and control a preset drone to emit a fog screen and project a fault warning based on the projection magnification.

[0007] By adopting the above technical solution, when a vehicle encounters an emergency, the drone collects images of the road at high altitude, and the size of the warning that can clearly display the warning is selected according to the number of vehicles on the road. The drone is also used to form a fog screen for projecting warnings of corresponding sizes, so that warnings with different impact ranges can be selected for different road conditions, thereby improving the convenience of using vehicle-mounted drones.

[0008] Optionally, also include: Step 107: When the vehicle breaks down, collect the ambient temperature; Step 108: determining a duration for maintaining the fog curtain in response to the ambient temperature; Step 109: determining the amount of water in the fog screen in response to the projection magnification; Step 110: determining the maintenance water volume in response to the mist curtain water volume and the maintenance time, and collecting the ambient humidity; Step 111: determining a replenishing water amount in response to the maintenance water amount and the ambient humidity; Step 112: determining a spraying pressure in response to the maintaining water volume; Step 113: Control the preset UAV to spray the water mist of the supplementary water amount at the warning height according to the spraying pressure to form a fog curtain.

[0009] By adopting the above technical solution, when a vehicle encounters an emergency, the temperature value of the vehicle's location is detected in real time, so as to select the amount of water required to spray to form a stable fog curtain at the temperature value, and the humidity value of the vehicle's location is detected in real time to supplement the insufficient water, so as to create a stable fog curtain for projecting warnings of corresponding size through the drone.

[0010] Optionally, a fog curtain manufacturing method is further included, and the fog curtain manufacturing method includes: Step 200: determining a humidity threshold in response to the maintenance water level; Step 201: When the ambient humidity is higher than a humidity threshold, identifying a droplet diameter from the road condition image; Step 202: When the droplet diameter exceeds a preset fog curtain threshold, determining a fogging position in response to the projection magnification; Step 203: Controlling a preset UAV to fly to the fog-making position, and determining the fog-making temperature in response to the droplet diameter and the ambient temperature; Step 204: Control the heating device preset on the drone to heat according to the fog-making temperature.

[0011] By adopting the above technical solution, when the humidity at the location of the vehicle is too high, the droplets sprayed by the drone will easily come into contact with the existing droplets in the air and merge into larger droplets, making it difficult for the droplets to suspend. The humid air is heated by the heating device, so that the larger droplets in the air evaporate and shrink, thereby forming the required fog curtain, thereby improving the convenience of using the vehicle-mounted drone.

[0012] Optionally, the fog curtain manufacturing method further includes: Step 205: When the water volume exceeds a preset flow threshold, identifying a route direction from the road condition image; Step 206: Control the preset UAV to turn according to the route direction, and determine the diffusion wind pressure in response to the maintained water volume; Step 207: determining a cooling coefficient in response to the diffusion wind pressure; Step 208: updating the misting temperature in response to the cooling coefficient; Step 209: Control the blowing devices symmetrically preset on both sides of the heating device to blow air toward the heating device according to the diffusion wind pressure.

[0013] By adopting the above technical solution, when the required fog curtain area is large, the fog formed by the heating device can easily diffuse evenly in a spherical shape with the heating device as the center. At this time, air is blown from both sides of the heating device to the heating device through the blowing device to drive the fog to diffuse flatly to both sides, thereby improving the convenience of fog curtain manufacturing.

[0014] Optionally, the fog curtain manufacturing method further includes: Step 210: When the vehicle breaks down, collect ambient light intensity; Step 211: When the ambient light intensity exceeds a preset projection threshold, determining the number of shielding layers in response to the ambient light intensity; Step 212: determining an occlusion distance in response to the number of occlusion layers, and identifying a strong light direction from the road condition image; Step 213: determining a shielding position in response to the strong light direction, the number of shielding layers, and the shielding spacing; Step 214: Control the preset UAV to fly to the shielding position and create a fog curtain.

[0015] By adopting the above technical solution, when the external light is too strong, the projected light is easily interfered by the external light, resulting in unclear imaging on the fog screen. At this time, a multi-layer fog screen is created by the drone to block the strong light from directly imaging the fog screen. At the same time, the multi-layer fog screen is superimposed to improve the clarity of the fog screen projection and improve the stability of the fog screen projection.

[0016] Optionally, the fog curtain manufacturing method further includes: Step 215: determining a blocking distance in response to the number of blocking layers and the blocking spacing; Step 216: When the blocking distance exceeds a preset distance threshold, identifying the ambient light color from the road condition image; Step 217: Determine a suppressed light color in response to the ambient light color; Step 218: determining a suppression coefficient in response to the suppression light color and the ambient light color; Step 219: updating the number of shading layers in response to the suppression coefficient, and selecting a suppression agent in response to the suppression light color; Step 220: determining an obstruction number in response to the obstruction position; Step 221: Based on the shielding number, a preset drone is controlled to inject the inhibitory agent into the water tank and create a fog curtain that suppresses the light color at the shielding position.

[0017] By adopting the above technical solution, when the external light is too strong, the number of fog screen layers required to block the external light is too many. At this time, the color of the fog screen is adjusted to adjust the fog screen's ability to block external light, thereby reducing the number of fog screen layers required to block external light and improving the stability of the fog screen projection.

[0018] Optionally, the fog curtain manufacturing method further includes: Step 222: collecting fog curtain images; Step 223: Identifying the diameter of the fog curtain at the upper edge of the fog curtain from the fog curtain image; Step 224: determining a falling speed in response to the diameter of the fog curtain; Step 225: determining a drop sequence in response to the drop speed; Step 226: Determine a holding process in response to the drop sequence; Step 227: Determine the drop height in response to the lifting stroke and the drop speed; Step 228: Determine the lifting wind speed in response to the drop height; Step 229: Control the lifting device preset on the vehicle to move according to the lifting stroke and blow air upward according to the lifting wind speed.

[0019] By adopting the above technical solution, air is blown toward the fog curtain from below through the lifting device, so that the droplets in the fog curtain are lifted by the rising airflow, thereby reducing the falling speed of the droplets, thereby increasing the time the droplets are suspended in the air, thereby increasing the maintenance time of the fog curtain and improving the stability of the fog curtain projection.

[0020] Optionally, a mist curtain recovery method is further included, and the mist curtain recovery method includes: Step 300: Determining a stop signal in response to the driving parameter; Step 301: determining a recovery stroke in response to the stop signal and the falling sequence; Step 302: determining a recovery wind speed in response to the drop height; Step 303: Controlling the recovery device preset on the vehicle to move according to the recovery stroke and absorb the mist according to the recovery wind speed.

[0021] By adopting the above technical solution, when the fog screen projection is turned off, the residual droplets on the fog screen will easily fall to the ground, causing the ground to be slippery. The part of the fog screen close to the ground is sucked by the suction device, thereby recovering the water vapor of the fog screen and improving the convenience of using the fog screen.

[0022] Optionally, the mist curtain recovery method further includes: Step 304: determining an edge height in response to the stop signal and the falling speed; Step 305: determining a midpoint height in response to the edge height; Step 306: Determine the projection direction and projection speed in response to the midpoint height; Step 307: determining a receiving direction in response to the projection direction and projection speed; Step 308: Control the receiving device preset on the vehicle to turn according to the receiving direction, and control the projecting device preset on the vehicle to turn according to the projecting direction and project the preset water-absorbing ball according to the projecting speed.

[0023] By adopting the above technical solution, the droplets that make up the fog curtain are smaller and fall more slowly. When the fog curtain is larger, the time waiting for the droplets at a high position to fall is longer. The water-absorbing balls with a hydrophilic surface are shot into the fog curtain through the projectile device, thereby absorbing the water vapor at the high position of the fog curtain and improving the convenience of using the fog curtain.

[0024] In a second aspect, the present application provides a fog screen projection control system, which adopts the following technical solutions: A fog screen projection control system, comprising: Acquisition module, used to collect driving parameters, road condition images, ambient temperature, ambient humidity, ambient light intensity and fog curtain images; A memory, used to store any one of the above-mentioned fog screen projection control methods; The processor can load and execute the program in the memory.

[0025] By adopting the above technical solution, when a vehicle encounters an emergency, the drone collects images of the road at high altitude, and the size of the warning that can clearly display the warning is selected according to the number of vehicles on the road. The drone is also used to form a fog screen for projecting warnings of corresponding sizes, so that warnings with different impact ranges can be selected for different road conditions, thereby improving the convenience of using vehicle-mounted drones.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. When a vehicle encounters an emergency, drones can collect images of the road from high altitude, and the size of the warning that can be clearly displayed can be selected according to the number of vehicles on the road. The drones can also form a fog screen to project warnings of corresponding sizes, thereby enabling different warning ranges to be selected for different road conditions, improving the convenience of using vehicle-mounted drones. 2. When a vehicle encounters an emergency, the temperature at the vehicle's location is detected in real time to select the amount of water needed to spray a stable fog curtain at that temperature. The humidity at the vehicle's location is also detected in real time to replenish the insufficient water, thereby creating a stable fog curtain for projecting a warning of the corresponding size through the drone. 3. When the humidity at the location of the vehicle is too high, the droplets sprayed by the drone are easy to come into contact with the original droplets in the air and merge into larger droplets, making it difficult for the droplets to float. The humid air is heated by the heating device, so that the larger droplets in the air evaporate and shrink, thereby forming the required fog curtain, thereby improving the convenience of using the vehicle-mounted drone. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a process of fog screen projection control method Figure 1 ; Figure 2 It is a process of fog screen projection control method Figure 2 ; Figure 3 The process of fog curtain manufacturing method Figure 1 ; Figure 4 The process of fog curtain manufacturing method Figure 2 ; Figure 5 The process of fog curtain manufacturing method Figure 3 ; Figure 6 The process of fog curtain manufacturing method Figure 4 ; Figure 7 The process of fog curtain manufacturing method Figure 5 ; Figure 8 The process of mist curtain recovery method Figure 1 ; Figure 9 The process of mist curtain recovery method Figure 2 . DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] Reference Figure 1 , a fog screen projection control method, comprising: Step 100: Collect vehicle driving parameters.

[0030] Driving parameters refer to parameters detected during vehicle driving, such as vehicle speed, engine speed, engine temperature, and vehicle light signals. Driving parameters can be directly retrieved from the vehicle's central control system. The method of retrieving driving parameters is selected by the staff based on actual conditions and will not be elaborated here.

[0031] Step 101: Determine whether a vehicle failure occurs in response to the driving parameters.

[0032] A fault refers to a situation such as a vehicle breakdown or traffic accident that requires rescue. The vehicle can be judged to have a fault when the double flash light signal in the vehicle light signal in the driving parameters is turned on. The method of judging the fault is selected by the staff based on the actual situation and will not be elaborated here.

[0033] Step 102: When a vehicle breaks down, a preset drone is controlled to collect road condition images.

[0034] A drone is an unmanned aerial vehicle mounted on a vehicle to create a fog screen. It's equipped with a camera for capturing images, a nozzle for spraying water mist, and a tank for storing liquid. The drone uses the nozzle to spray the liquid in the tank as a mist, creating a fog screen. The vehicle's projection system then projects the image onto the fog screen. The drone is selected by staff based on actual circumstances and is not detailed here. Road condition images refer to images of the road section where the vehicle is located. These images are captured vertically downward by the drone's camera after it is controlled to launch. The method for collecting road condition images is selected by staff based on actual circumstances and is not detailed here.

[0035] Step 103: Identify the number of vehicles from the road condition image.

[0036] The number of vehicles refers to the number of vehicles in the road condition image. The number of vehicles can be determined by image recognition technology. The method for identifying the number of vehicles is common knowledge in this field and will not be described in detail here.

[0037] Step 104: Determine a projection magnification in response to the number of vehicles.

[0038] The projection magnification refers to the size magnification of the sign required to warn vehicles in the current road conditions. When there are many vehicles, it is difficult for vehicles in the distance to see the standard-sized warning sign. At this time, a larger projection magnification is adopted to display a larger warning sign. The projection magnification can be obtained from the magnification relationship table. The magnification relationship table refers to a data table that records the number of different vehicles and their corresponding projection magnifications. The warning sign refers to a fault warning used to warn other vehicles that the vehicle has a fault. The warning sign generally uses a red hollow triangle. The warning sign is selected by the staff according to the actual situation and will not be elaborated here.

[0039] Step 105: Determine a warning height in response to the projection magnification.

[0040] The warning height refers to the height value of the upper edge of the fog screen required for the warning sign to display the projection magnification. The calculation method of the warning height is common knowledge among people in this field and will not be elaborated here.

[0041] Step 106: Control a preset drone to ascend based on the warning altitude, and control a preset drone to emit a fog screen and project a fault warning based on the projection magnification.

[0042] When a vehicle encounters an emergency, drones are used to collect images of the road at high altitudes, and the size of the warning that can clearly display the warning is selected according to the number of vehicles on the road. The drones are also used to form a fog screen for projecting warnings of corresponding sizes, so that warnings with different impact ranges can be selected for different road conditions, thereby improving the convenience of using vehicle-mounted drones.

[0043] Reference Figure 2 , a fog screen projection control method, further comprising: Step 107: When a vehicle failure occurs, collect the ambient temperature.

[0044] Ambient temperature refers to the air temperature at the location of the vehicle. The ambient temperature can be collected by a temperature sensor fixed on the vehicle. The method of collecting the ambient temperature is selected by the staff based on actual conditions and will not be elaborated here.

[0045] Step 108: Determine the duration of maintaining the fog curtain in response to the ambient temperature.

[0046] The maintenance time refers to the minimum duration that the fog curtain can last under the ambient temperature. The maintenance time can be obtained from the maintenance data table, which is a data table that records different ambient temperatures and their corresponding maintenance times.

[0047] Step 109: Determine the amount of water in the fog curtain in response to the projection magnification.

[0048] The fog screen water volume refers to the total water volume of the fog screen required to display the warning sign of the projection magnification. The fog screen water volume corresponding to the projection magnification can be queried from the water volume relationship table. The water volume relationship table refers to a data table that records different projection magnifications and their corresponding fog screen water volumes.

[0049] Step 110: Determine the maintenance water volume in response to the mist curtain water volume and the maintenance time, and collect the ambient humidity.

[0050] The maintenance water volume refers to the amount of water required to maintain the fog curtain per unit time. The quotient of the fog curtain water volume and the maintenance time can be calculated as the maintenance water volume.

[0051] Ambient humidity refers to the humidity value at the location of the vehicle. The ambient humidity can be collected by a humidity sensor fixed on the vehicle. The method of collecting the ambient humidity is selected by the staff according to the actual situation and will not be elaborated here.

[0052] Step 111: Determine the amount of supplementary water in response to the maintenance water amount and the ambient humidity.

[0053] The replenishment water volume refers to the amount of water that needs to be replenished. The volume value of the fog screen can be first called up by the projection magnification, and then the product of the ambient humidity and the volume value is calculated as the existing water volume. Finally, the difference between the maintenance water volume and the existing water volume is calculated as the replenishment water volume.

[0054] Step 112: Determine a spraying pressure in response to the maintenance water volume.

[0055] Spraying pressure refers to the pressure value required to spray a mist curtain that displays a warning sign with a projection magnification. The spraying pressure corresponding to the maintenance water volume can be queried from the pressure relationship table. The pressure relationship table refers to a data table that records different maintenance water volumes and their corresponding spraying pressures.

[0056] Step 113: Control the preset UAV to spray the water mist of the supplementary water amount at the warning height according to the spraying pressure to form a fog curtain.

[0057] When a vehicle encounters an emergency, the temperature value of the vehicle's location is detected in real time, so as to select the amount of water needed to spray to form a stable fog curtain at the temperature value, and the humidity value of the vehicle's location is detected in real time to supplement the insufficient water, so as to create a stable fog curtain for projecting warnings of corresponding size through drones.

[0058] Reference Figure 3 , the fog curtain manufacturing method includes: Step 200: Determine a humidity threshold in response to the maintenance water level.

[0059] The humidity threshold refers to the minimum humidity value after spraying the liquid with a maintenance water volume to form a fog curtain. The humidity threshold corresponding to the maintenance water volume can be obtained from the humidity relationship table. The humidity relationship table refers to a data table that records different maintenance water volumes and their corresponding humidity thresholds.

[0060] Step 201: When the ambient humidity is higher than a humidity threshold, identifying a droplet diameter from the road condition image.

[0061] Ambient humidity higher than the humidity threshold indicates that the water vapor in the air is sufficient to form a fog curtain. The droplet diameter refers to the maximum diameter of the droplets in the air at the location of the vehicle, which can be obtained by identifying the droplet diameter from the road condition image using image recognition technology. The method for identifying the droplet diameter is common knowledge among people in this field and will not be elaborated here.

[0062] Step 202: When the droplet diameter exceeds a preset fog curtain threshold, a fogging position is determined in response to the projection magnification.

[0063] The fog threshold refers to the maximum diameter of droplets that form a fog curtain. This threshold is determined by personnel based on actual conditions and is not detailed here. Droplet diameters exceeding the threshold indicate that the droplets in the air are too large, making it difficult for them to remain stably suspended, thus preventing the formation of a fog curtain. The fog position refers to the center point of the fog curtain. The method for determining the fog position is common knowledge in the field and is not detailed here.

[0064] Step 203: Control a preset UAV to fly to the fog-making position, and determine the fog-making temperature in response to the droplet diameter and the ambient temperature.

[0065] The fogging temperature refers to the temperature value required to evaporate droplets of a certain diameter and reduce them to the fog curtain threshold. The fogging temperature corresponding to the droplet diameter and ambient temperature can be queried from the temperature relationship table. The temperature relationship table refers to a data table that records different droplet diameters and ambient temperatures and their corresponding fogging temperatures.

[0066] Step 204: Control the heating device preset on the drone to heat according to the fog-making temperature.

[0067] When the humidity at the location of the vehicle is too high, the droplets sprayed by the drone will easily come into contact with the existing droplets in the air and merge into larger droplets, making it difficult for the droplets to float. The humid air is heated by the heating device, so that the larger droplets in the air evaporate and shrink, thereby forming the required fog curtain, thereby improving the convenience of using the vehicle-mounted drone.

[0068] Reference Figure 4 , the fog curtain manufacturing method also includes: Step 205: When the water volume exceeds a preset flow threshold, a route direction is identified from the road condition image.

[0069] The flow threshold refers to the maximum amount of water at which fog can flow naturally to form a fog curtain. When the liquid that maintains the water volume is evaporated to form fog, the fog will easily diffuse naturally. When there is too much fog, it will easily cause the fog to accumulate and be difficult to diffuse in time, making it difficult for the fog to quickly form a fog curtain. The flow threshold is selected by the staff based on actual conditions and will not be elaborated here. Maintaining the water volume beyond the flow threshold means that there is too much fog formed by liquid evaporation. The route direction refers to the direction of the road where the vehicle is located. The route direction can be identified from the road condition image through image recognition technology. The method of identifying the route direction is common knowledge among people in this field and will not be elaborated here.

[0070] Step 206: Control the preset UAV to turn in the direction of the route, and determine the diffusion wind pressure in response to the maintained water volume.

[0071] The blowing device refers to a device used to blow air toward the heating device to drive the mist generated from the heating device to disperse. The blowing device is symmetrically arranged on both sides of the heating device, so as to blow air on both sides of the heating device at the same time to drive the mist to disperse evenly. The blowing device is selected by the staff according to actual conditions and will not be elaborated here.

[0072] Diffusion wind pressure refers to the wind pressure value that is used by the blowing device to disperse the mist generated by the heating device in a timely manner. The maintenance water volume and its corresponding diffusion wind pressure can be obtained from the wind pressure relationship table. When the maintenance water volume is large, the speed of generated mist is faster. At this time, a larger wind pressure is used to disperse the mist. The wind pressure relationship table refers to a data table that records different maintenance water volumes and their corresponding diffusion wind pressures.

[0073] Step 207: Determine a cooling coefficient in response to the diffusion wind pressure.

[0074] The cooling coefficient refers to a numerical value used to demonstrate the cooling effect of the diffused wind pressure. When the blowing device blows air to the heating device, it is easy to send the colder air from the outside to the heating device, thereby causing the temperature around the heating device to be lower. The greater the diffused wind pressure, the greater the cooling coefficient. The diffused wind pressure and its corresponding cooling coefficient can be queried from the cooling relationship table. The cooling relationship table refers to a data table that records different diffused wind pressures and their corresponding cooling coefficients.

[0075] Step 208: Update the fogging temperature in response to the cooling coefficient.

[0076] Generally, the product of the cooling coefficient and the fogging temperature is calculated as the new fogging temperature.

[0077] Step 209: Control the blowing devices symmetrically preset on both sides of the heating device to blow air toward the heating device according to the diffusion wind pressure.

[0078] When the required area of ​​the fog curtain is large, the fog formed by the heating device tends to spread evenly in a spherical shape with the heating device as the center. At this time, the blowing device is used to blow air from both sides of the heating device to the heating device to drive the fog to spread flatly to both sides, thereby improving the convenience of fog curtain manufacturing.

[0079] Reference Figure 5 , the fog curtain manufacturing method also includes: Step 210: When the vehicle breaks down, collect the ambient light intensity.

[0080] Ambient light intensity refers to the light intensity value at the location of the vehicle. The ambient light intensity can be collected by a photosensor fixed on the vehicle. The method of collecting the ambient light intensity is selected by the staff according to the actual situation and will not be elaborated here.

[0081] Step 211: When the ambient light intensity exceeds a preset projection threshold, the number of shielding layers is determined in response to the ambient light intensity.

[0082] The projection threshold refers to the maximum ambient light intensity that can be clearly displayed by the fog screen projection. The projection threshold is selected by the staff based on actual conditions and is not detailed here. Ambient light intensity exceeding the projection threshold indicates that the external light has a significant impact on the fog screen projection, which can easily lead to unclear imaging on the fog screen. The number of occlusion layers refers to the minimum number of fog screen layers required to reduce the impact of external light on fog screen imaging. The higher the ambient light intensity, the higher the number of occlusion layers required. The number of occlusion layers corresponding to the ambient light intensity can be queried from the occlusion relationship table, which is a data table that records different ambient light intensities and their corresponding occlusion layers.

[0083] Step 212: Determine an occlusion distance in response to the number of occlusion layers, and identify a strong light direction from the road condition image.

[0084] The blocking spacing refers to the distance between the fog screens used to block external light. When the fog screens are too close, it is easy to cause the mixing of multiple layers of fog screens, thereby reducing the three-dimensional blocking advantage of the multi-layer structure. When the fog screens are too far apart, it is easy to produce "light spot leakage", thereby reducing the overall blocking effect. The blocking spacing can be obtained from the spacing relationship table. The spacing relationship table refers to a data table that records different blocking layers and their corresponding blocking spacing.

[0085] Step 213: Determine the shielding position in response to the strong light direction, the number of shielding layers, and the shielding distance.

[0086] The shielding position refers to the midpoint of the upper edge of the multi-layer fog curtain used to shield external light. The method for determining the shielding position is common knowledge in this field and will not be described in detail here.

[0087] Step 214: Control the preset UAV to fly to the shielding position and create a fog curtain.

[0088] When the external light is too strong, the projected light is easily interfered by the external light, resulting in unclear imaging on the fog screen. At this time, multiple drones are used to create multi-layer fog screens to block the strong light from directly imaging. At the same time, the multi-layer fog screens are superimposed to improve the clarity of the fog screen projection and improve the stability of the fog screen projection.

[0089] Reference Figure 6 , the fog curtain manufacturing method also includes: Step 215: Determine the occlusion distance in response to the occlusion layer number and the occlusion spacing.

[0090] The blocking distance refers to the farthest distance between fog screens, that is, the distance between the imaged fog screen and the outermost blocking fog screen. The blocking distance can be calculated as the product of the number of blocking layers and the blocking spacing.

[0091] Step 216: When the blocking distance exceeds a preset distance threshold, the ambient light color is identified from the road condition image.

[0092] The distance threshold refers to the maximum distance the fog curtain can extend. When the distance between fog curtains is too far, it can easily affect other vehicles, obstructing their vision. The distance threshold is selected by personnel based on actual conditions and is not detailed here. If the obstruction distance exceeds the distance threshold, the fog curtain is likely to affect other vehicles. Ambient light color refers to the dominant color of external light. Ambient light color can be determined through image recognition technology. The identification method of ambient light color is common knowledge in this field and is not detailed here.

[0093] Step 217: Determine a suppressed light color in response to the ambient light color.

[0094] Suppression light color refers to the color used to absorb ambient light color. The fog screen has the strongest absorption for light that is complementary to its own color (such as red fog screen for cyan light, blue fog screen for yellow light), and has the best shielding effect. It has the weakest absorption for light of the same color, and has the worst shielding effect. The suppression light color can be obtained from the suppression relationship table. The suppression relationship table refers to a data table that records different ambient light colors and their corresponding suppression light colors and suppression coefficients.

[0095] Step 218: Determine a suppression coefficient in response to the suppression light color and the ambient light color.

[0096] The suppression coefficient refers to a value used to show the suppression effect of the suppression light color on the ambient light color. The stronger the suppression effect, the greater the suppression coefficient. The suppression coefficient can be obtained from the suppression relationship table.

[0097] Step 219: updating the number of occlusion layers in response to the suppression coefficient, and selecting a suppression agent in response to the suppression light color.

[0098] Generally, the quotient of the number of occlusion layers and the suppression coefficient is calculated as the new number of occlusion layers. The updating method for the occlusion layer number is selected by the staff based on the actual situation and is not detailed here. The suppression reagent refers to the reagent used to dye the liquid in the drone's water tank. The selection method of the suppression reagent is selected by the staff based on the actual situation and is not detailed here.

[0099] Step 220: Determine an occlusion number in response to the occlusion position.

[0100] The occlusion number refers to the number of the UAV in the occlusion position. The method for determining the occlusion number is common knowledge in this field and will not be described in detail here.

[0101] Step 221: Based on the shielding number, a preset drone is controlled to inject the inhibitory agent into the water tank and create a fog curtain that suppresses the light color at the shielding position.

[0102] When the external light is too strong, too many fog screen layers are needed to block the external light. At this time, the color of the fog screen is adjusted to adjust the fog screen's ability to block external light, thereby reducing the number of fog screen layers required to block the external light and improving the stability of the fog screen projection.

[0103] Reference Figure 7 , the fog curtain manufacturing method also includes: Step 222: Collect fog curtain images.

[0104] The fog curtain image refers to a picture of the upper edge of the fog curtain, which can be collected by a camera on a drone. The method for collecting the fog curtain image is selected by the staff according to the actual situation and will not be described in detail here.

[0105] Step 223: Identify the diameter of the fog curtain at the upper edge of the fog curtain from the fog curtain image.

[0106] The diameter of the fog curtain refers to the diameter of the liquid droplets at the upper edge of the fog curtain. The diameter of the fog curtain can be determined by image recognition technology. The method for identifying the diameter of the fog curtain is common knowledge in this field and will not be described in detail here.

[0107] Step 224: Determine the falling speed in response to the diameter of the fog curtain.

[0108] The falling speed refers to the speed at which a water drop falls. The larger the diameter of the water drop, the heavier it is and the faster it falls. The method for determining the falling speed is common knowledge among people in this field and will not be elaborated here.

[0109] Step 225: Determine a drop sequence in response to the drop speed.

[0110] The falling order refers to the order in which water droplets fall to the ground, that is, the order of the corresponding ground positions after arranging the falling speeds from large to small, where the ground position refers to the position where the droplets at the upper edge of the fog curtain fall on the ground. The method for determining the falling order and ground position is common knowledge among people in this field and will not be elaborated here.

[0111] Step 226: Determine a holding process in response to the drop sequence.

[0112] The lifting device is a device used to blow air toward the mist curtain to lift it. The vehicle is equipped with guide rails for the lifting device to move, and the guide rails are generally oriented perpendicular to the vehicle's direction of travel. The lifting device is selected by the operator based on actual conditions and is not detailed here. The lifting stroke refers to the path the lifting device moves along in the order of descent. The method for determining the lifting stroke is common knowledge in this field and is not detailed here.

[0113] Step 227: Determine the drop height in response to the lifting stroke and the drop speed.

[0114] The falling height refers to the height value of the liquid drop at the corresponding position when the lifting device moves to the ground position according to the lifting stroke. The time it takes to move to the ground position can be calculated based on the lifting stroke, and then the falling height can be calculated based on the time and the falling speed. The method for calculating the falling height is common knowledge among people in this field and will not be elaborated here.

[0115] Step 228: Determine the lifting wind speed in response to the drop height.

[0116] The lifting wind speed refers to the wind speed required to lift the droplets by blowing air through the lifting device. The lower the drop height, the greater the lifting wind speed is required to drive the droplets up. The lifting wind speed can be obtained from the lifting relationship table. The lifting relationship table refers to a data table that records different drop heights and their corresponding lifting wind speeds.

[0117] Step 229: Control the lifting device preset on the vehicle to move according to the lifting stroke and blow air upward according to the lifting wind speed.

[0118] The lifting device blows air toward the fog curtain from below, so that the rising airflow lifts the droplets in the fog curtain, thereby reducing the falling speed of the droplets, thereby increasing the length of time the droplets are suspended in the air, thereby increasing the maintenance time of the fog curtain and improving the stability of the fog curtain projection.

[0119] Reference Figure 8 , the mist curtain recovery methods include: Step 300: Determine a stop signal in response to the driving parameter.

[0120] The stop signal refers to the signal to stop the fog screen projection. The vehicle's double flash lights can be used as the stop signal. The stop signal is selected by the staff according to the actual situation and will not be elaborated here.

[0121] Step 301: Determine a recovery stroke in response to the stop signal and the falling sequence.

[0122] The recovery device is used to draw air from the mist curtain to recover moisture from it. The recovery device is selected by the operator based on actual conditions and is not detailed here. The recovery stroke refers to the route the recovery device takes to extract moisture in the order it falls. The recovery stroke is determined similarly to the method for determining the support stroke described above.

[0123] Step 302: Determine the recovery wind speed in response to the drop height.

[0124] The recovery wind speed refers to the wind speed required to recover water vapor through the recovery device. The lower the falling height, the greater the recovery wind speed is required to prevent water vapor from falling to the ground. The recovery wind speed can be obtained from the recovery relationship table. The recovery relationship table refers to a data table that records different falling heights and their corresponding recovery wind speeds.

[0125] Step 303: Controlling the recovery device preset on the vehicle to move according to the recovery stroke and absorb the mist according to the recovery wind speed.

[0126] When the fog screen projection is turned off, the residual droplets on the fog screen are easy to fall to the ground, causing the ground to be slippery. The suction device absorbs the part of the fog screen close to the ground, thereby recovering the water vapor of the fog screen and improving the convenience of using the fog screen.

[0127] Reference Figure 9 , the mist curtain recovery method also includes: Step 304: Determine the edge height in response to the stop signal and the falling speed.

[0128] The edge height refers to the height value of each point on the edge of the fog curtain. The initial height of the upper edge of the fog curtain can be identified from the fog curtain image, and then the dynamic height value of the upper edge of the fog curtain can be determined in combination with the falling speed. The method for determining the edge height is common knowledge among people in this field and will not be elaborated here.

[0129] Step 305: Determine a midpoint height in response to the edge height.

[0130] The midpoint height refers to the height value of the midpoint of the upper edge of the fog curtain. The method for determining the midpoint height is common knowledge to those skilled in the art and will not be elaborated here.

[0131] Step 306: Determine the projection direction and projection speed in response to the midpoint height.

[0132] A water-absorbing ball refers to a solid small ball whose surface is covered with a hydrophilic material. When the water-absorbing ball comes into contact with water droplets, the water droplets easily adhere to the hydrophilic material on the surface of the water-absorbing ball. A projectile device refers to a device used to launch water-absorbing balls, and a receiving device refers to a device used to receive water-absorbing balls projected by the projectile device. The projectile device and the recovery device are symmetrically arranged on both sides of the top of the vehicle. The water-absorbing ball, the projectile device and the receiving device are selected by the staff according to actual conditions and will not be elaborated here.

[0133] The ejection direction refers to the direction of the ejection device, and the ejection speed refers to the speed at which the ejection device ejects the water-absorbing balls. A parabola can be fitted by the position of the ejection device, the position of the midpoint of the upper edge, and the position of the recovery device, and then the ejection direction and ejection speed can be calculated using the parabola. The positions of the ejection device and the recovery device can be input in advance by the staff. Since the ejection device and the recovery device are symmetrically arranged, and the unmanned ascent to create the fog curtain is also vertical, the position of the midpoint of the upper edge is the midpoint between the ejection device and the recovery device at the midpoint height. The method for determining the ejection direction and ejection speed is selected by the staff according to actual conditions and will not be elaborated here.

[0134] Step 307: Determine a receiving direction in response to the projection direction and projection speed.

[0135] The receiving direction refers to the direction in which the receiving device receives the water-absorbing balls. The receiving direction can be obtained by fitting a parabola obtained by the position of the projectile device, the position of the midpoint of the upper edge and the position of the recovery device. The method for determining the receiving direction is selected by the staff according to the actual situation and will not be elaborated here.

[0136] Step 308: Control the receiving device preset on the vehicle to turn according to the receiving direction, and control the projecting device preset on the vehicle to turn according to the projecting direction and project the preset water-absorbing ball according to the projecting speed.

[0137] The droplets that make up the fog curtain are small and fall slowly. When the fog curtain is large, it takes a long time to wait for the droplets at a high position to fall. The water-absorbing balls with a hydrophilic surface are shot into the fog curtain through the projectile device, thereby absorbing the water vapor at the high position of the fog curtain and improving the convenience of using the fog curtain.

[0138] Based on the same inventive concept, an embodiment of the present invention provides a fog screen projection control system, which adopts the following technical solutions: A fog screen projection control system, comprising: Acquisition module, used to collect driving parameters, road condition images, ambient temperature, ambient humidity, ambient light intensity and fog curtain images; A memory, used to store any one of the above-mentioned fog screen projection control methods; The processor can load and execute the program in the memory.

[0139] Those skilled in the art will clearly understand that for the sake of convenience and brevity, the division of the above-mentioned functional modules is only used as an example for illustration. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. The specific working processes of the above-mentioned systems, devices, and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0140] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A fog screen projection control method, characterized in that: include: Step 100: Collecting vehicle driving parameters; Step 101: determining whether a vehicle failure occurs in response to the driving parameters; Step 102: When a vehicle breaks down, a preset drone is controlled to collect road condition images; Step 103: Identify the number of vehicles from the road condition image; Step 104: determining a projection magnification in response to the number of vehicles; Step 105: determining a warning height in response to the projection magnification; Step 106: Control a preset drone to ascend based on the warning altitude, and control a preset drone to emit a fog screen and project a fault warning based on the projection magnification.

2. A fog screen projection control method according to claim 1, characterized in that: Also includes: Step 107: When the vehicle breaks down, collect the ambient temperature; Step 108: determining a duration for maintaining the fog curtain in response to the ambient temperature; Step 109: determining the amount of water in the fog screen in response to the projection magnification; Step 110: determining the maintenance water volume in response to the mist curtain water volume and the maintenance time, and collecting the ambient humidity; Step 111: determining a replenishing water amount in response to the maintenance water amount and the ambient humidity; Step 112: determining a spraying pressure in response to the maintaining water volume; Step 113: Control the preset UAV to spray the water mist of the supplementary water amount at the warning height according to the spraying pressure to form a fog curtain.

3. A fog screen projection control method according to claim 2, characterized in that: Also included is a fog curtain manufacturing method, the fog curtain manufacturing method comprising: Step 200: determining a humidity threshold in response to the maintenance water level; Step 201: When the ambient humidity is higher than a humidity threshold, identifying a droplet diameter from the road condition image; Step 202: When the droplet diameter exceeds a preset fog curtain threshold, determining a fogging position in response to the projection magnification; Step 203: Controlling a preset UAV to fly to the fog-making position, and determining the fog-making temperature in response to the droplet diameter and the ambient temperature; Step 204: Control the heating device preset on the drone to heat according to the fog-making temperature.

4. A fog screen projection control method according to claim 3, characterized in that: The fog curtain manufacturing method also includes: Step 205: When the water volume exceeds a preset flow threshold, identifying a route direction from the road condition image; Step 206: Control the preset UAV to turn according to the route direction, and determine the diffusion wind pressure in response to the maintained water volume; Step 207: determining a cooling coefficient in response to the diffusion wind pressure; Step 208: updating the misting temperature in response to the cooling coefficient; Step 209: Control the blowing devices symmetrically preset on both sides of the heating device to blow air toward the heating device according to the diffusion wind pressure.

5. A fog screen projection control method according to claim 4, characterized in that: The fog curtain manufacturing method also includes: Step 210: When the vehicle breaks down, collect ambient light intensity; Step 211: When the ambient light intensity exceeds a preset projection threshold, determining the number of shielding layers in response to the ambient light intensity; Step 212: determining an occlusion distance in response to the number of occlusion layers, and identifying a strong light direction from the road condition image; Step 213: determining a shielding position in response to the strong light direction, the number of shielding layers, and the shielding spacing; Step 214: Control the preset UAV to fly to the shielding position and create a fog curtain.

6. A fog screen projection control method according to claim 5, characterized in that: The fog curtain manufacturing method also includes: Step 215: determining a blocking distance in response to the number of blocking layers and the blocking spacing; Step 216: When the blocking distance exceeds a preset distance threshold, identifying the ambient light color from the road condition image; Step 217: Determine a suppressed light color in response to the ambient light color; Step 218: determining a suppression coefficient in response to the suppression light color and the ambient light color; Step 219: updating the number of shading layers in response to the suppression coefficient, and selecting a suppression agent in response to the suppression light color; Step 220: determining an obstruction number in response to the obstruction position; Step 221: Based on the shielding number, a preset drone is controlled to inject the inhibitory agent into the water tank and create a fog curtain that suppresses the light color at the shielding position.

7. A fog screen projection control method according to claim 6, characterized in that: The fog curtain manufacturing method also includes: Step 222: collecting fog curtain images; Step 223: Identifying the diameter of the fog curtain at the upper edge of the fog curtain from the fog curtain image; Step 224: determining a falling speed in response to the diameter of the fog curtain; Step 225: determining a drop sequence in response to the drop speed; Step 226: Determine a holding process in response to the drop sequence; Step 227: Determine the drop height in response to the lifting stroke and the drop speed; Step 228: Determine the lifting wind speed in response to the drop height; Step 229: Control the lifting device preset on the vehicle to move according to the lifting stroke and blow air upward according to the lifting wind speed.

8. A fog screen projection control method according to claim 7, characterized in that: Also included is a mist curtain recovery method, the mist curtain recovery method comprising: Step 300: Determining a stop signal in response to the driving parameter; Step 301: determining a recovery stroke in response to the stop signal and the falling sequence; Step 302: determining a recovery wind speed in response to the drop height; Step 303: Controlling the recovery device preset on the vehicle to move according to the recovery stroke and absorb the mist according to the recovery wind speed.

9. A fog screen projection control method according to claim 8, characterized in that: The mist curtain recovery method further comprises: Step 304: determining an edge height in response to the stop signal and the falling speed; Step 305: determining a midpoint height in response to the edge height; Step 306: Determine the projection direction and projection speed in response to the midpoint height; Step 307: determining a receiving direction in response to the projection direction and projection speed; Step 308: Control the receiving device preset on the vehicle to turn according to the receiving direction, and control the projecting device preset on the vehicle to turn according to the projecting direction and project the preset water-absorbing ball according to the projecting speed.

10. A fog screen projection control system, characterized in that: include: Acquisition module, used to collect driving parameters, road condition images, ambient temperature, ambient humidity, ambient light intensity and fog curtain images; A memory, configured to store a fog screen projection control method according to any one of claims 1 to 9; The processor can load and execute the program in the memory.

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