A method and system for fog screen projection control

Abstract

The application relates to a fog screen projection control method and system, and relates to the field of fog screen projection, which comprises the following steps: 100, collecting driving parameters of a vehicle; 101, judging whether the vehicle has a fault in response to the driving parameters; 102, when the vehicle has a fault, controlling a preset unmanned aerial vehicle to collect road condition images; 103, identifying the number of vehicles from the road condition images; 104, determining a projection magnification in response to the number of vehicles; 105, determining a warning height in response to the projection magnification; 106, controlling the preset unmanned aerial vehicle to fly 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 application has the advantages that the convenience of using the vehicle-mounted unmanned aerial vehicle is improved, and the warning effect of different influence ranges can be selected according to different road conditions.

Description

TECHNICAL FIELD

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

[0002] Fog screen projection refers to an advanced projection technology that uses tiny water droplets generated by an atomization system to form a fog screen, and then projects an image onto the fog screen to form a visual effect with a sense of stereoscopic and permeability.

[0003] In the prior art, a UAV is usually carried on a vehicle. When an emergency situation such as vehicle failure, traffic accident, etc. occurs, the vehicle-mounted UAV can send a specific distress signal or indication mark, such as flashing light, arrow pointing to a safe direction, etc., to facilitate rescue personnel to quickly locate the vehicle position, and also provide clear indication for other vehicles and pedestrians to avoid secondary accidents.

[0004] The influence range of the distress signal or indication mark sent by the vehicle-mounted UAV is limited. When the traffic flow is congested, it is difficult for vehicles far away to be warned in time, which further aggravates the traffic congestion. SUMMARY

[0005] In order to improve the convenience of using the vehicle-mounted UAV and select different warning ranges according to different road conditions, the present application provides a fog screen projection control method and system.

[0006] In a first aspect, the present application provides a fog screen projection control method, which adopts the following technical solution:

[0007] A fog screen projection control method, comprising:

[0008] Step 100: collecting driving parameters of a vehicle;

[0009] Step 101: determining whether the vehicle has failed in response to the driving parameters;

[0010] Step 102: when the vehicle fails, controlling a preset UAV to collect road condition images;

[0011] Step 103: identifying the number of vehicles from the road condition images;

[0012] Step 104: determining a projection magnification in response to the number of vehicles;

[0013] Step 105: determining a warning height in response to the projection magnification;

[0014] Step 106: controlling the preset UAV to fly to the warning height based on the warning height, and controlling the preset UAV to send a fog screen and project a failure warning based on the projection magnification.

[0015] By adopting the technical scheme, when a vehicle encounters an emergency, the unmanned aerial vehicle collects images of the road at a high altitude, selects a size capable of clearly displaying a warning according to the number of vehicles on the road, and forms a fog screen for projecting a warning of the corresponding size by the unmanned aerial vehicle, so that different warnings with different influence ranges can be selected according to different road conditions, and the convenience of using the vehicle-mounted unmanned aerial vehicle is improved.

[0016] Optionally, the method further comprises:

[0017] Step 107: collecting an ambient temperature when the vehicle breaks down;

[0018] Step 108: determining a maintenance duration of the fog screen in response to the ambient temperature;

[0019] Step 109: determining a fog water amount in response to the projection magnification;

[0020] Step 110: determining a maintenance water amount in response to the fog water amount and the maintenance duration, and collecting an ambient humidity;

[0021] Step 111: determining a replenishment water amount in response to the maintenance water amount and the ambient humidity;

[0022] Step 112: determining a spraying pressure in response to the maintenance water amount;

[0023] Step 113: controlling a preset unmanned aerial vehicle to spray the replenishment water amount of water mist at the warning height according to the spraying pressure to form the fog screen.

[0024] By adopting the technical scheme, when a vehicle encounters an emergency, a temperature value of a location where the vehicle is located is detected in real time, so that a water amount required for forming a stable fog screen at the temperature value is selected, and a humidity value of the location where the vehicle is located is detected in real time to supplement the insufficient water amount, so that the unmanned aerial vehicle manufactures a stable fog screen for projecting a warning of the corresponding size.

[0025] Optionally, the method further comprises a fog screen manufacturing method, and the fog screen manufacturing method comprises:

[0026] Step 200: determining a humidity threshold in response to the maintenance water amount;

[0027] Step 201: identifying a droplet diameter from the road condition image when the ambient humidity is higher than the humidity threshold;

[0028] Step 202: determining a fogging position in response to the projection magnification when the droplet diameter exceeds a preset fog screen threshold;

[0029] Step 203: controlling a preset unmanned aerial vehicle to fly to the fogging position, and determining a fogging temperature in response to the droplet diameter and the ambient temperature;

[0030] Step 204: controlling a heating device preset on the unmanned aerial vehicle to heat according to the fogging temperature.

[0031] By adopting the technical scheme, when the humidity of the location of the vehicle is too high, the liquid droplets sprayed by the unmanned aerial vehicle are easy to contact and merge with the original liquid droplets in the air to become larger liquid droplets, so that the liquid droplets are difficult to suspend, the humid air is heated by the heating device, so that the larger liquid droplets in the air evaporate and shrink, and then the required fog curtain is formed, and the convenience of using the vehicle-mounted unmanned aerial vehicle is improved.

[0032] Optionally, the method for manufacturing the fog curtain further comprises:

[0033] Step 205: identifying a route direction from the road condition image when the water amount maintained exceeds a preset flow threshold value.

[0034] Step 206: controlling a preset unmanned aerial vehicle to turn according to the route direction, and determining a diffusion air pressure in response to the water amount maintained.

[0035] Step 207: determining a cooling coefficient in response to the diffusion air pressure.

[0036] Step 208: updating the fogging temperature in response to the cooling coefficient.

[0037] Step 209: controlling air blowing devices symmetrically preset on both sides of the heating device to blow air to the heating device according to the diffusion air pressure.

[0038] By adopting the technical scheme, when the required fog curtain area is large, the mist formed by the heating device is easy to uniformly diffuse in a spherical shape with the heating device as the center, at this time, the air blowing devices blow air to the heating device from both sides of the heating device to drive the mist to diffuse flatly to both sides, thereby improving the convenience of manufacturing the fog curtain.

[0039] Optionally, the method for manufacturing the fog curtain further comprises:

[0040] Step 210: collecting ambient light intensity when the vehicle fails.

[0041] Step 211: determining a number of shielding layers in response to the ambient light intensity when the ambient light intensity exceeds a preset projection threshold value.

[0042] Step 212: determining a shielding interval in response to the number of shielding layers, and identifying a strong light direction from the road condition image.

[0043] Step 213: determining a shielding position in response to the strong light direction, the number of shielding layers, and the shielding interval.

[0044] Step 214: controlling a preset unmanned aerial vehicle to fly to the shielding position and manufacture a fog curtain.

[0045] By adopting the above technical scheme, when the external light is too strong, the projected light is easily disturbed by the external light, thereby causing the imaging on the fog screen to be unclear. At this time, the multi-layer fog screen is manufactured by the unmanned aerial vehicle to block the direct imaging of the strong light, and the imaging is superimposed through the multi-layer fog screen to improve the clarity and stability of the fog screen projection.

[0046] Optionally, the fog screen manufacturing method further comprises:

[0047] Step 215: determining a shielding distance in response to the number of shielding layers and the shielding interval;

[0048] Step 216: identifying an ambient light color from the road condition image when the shielding distance exceeds a preset distance threshold;

[0049] Step 217: determining an inhibiting light color in response to the ambient light color;

[0050] Step 218: determining an inhibiting coefficient in response to the inhibiting light color and the ambient light color;

[0051] Step 219: updating the number of shielding layers in response to the inhibiting coefficient, and selecting an inhibiting reagent in response to the inhibiting light color;

[0052] Step 220: determining a shielding number in response to the shielding position;

[0053] Step 221: controlling the preset unmanned aerial vehicle to inject the inhibiting reagent into the water tank and to manufacture the fog screen of the inhibiting light color at the shielding position based on the shielding number.

[0054] By adopting the above technical scheme, when the external light is too strong, the number of fog screen layers required to shield the external light is too large. At this time, the color of the fog screen is adjusted to adjust the blocking ability of the fog screen to the external light, thereby reducing the number of fog screen layers required to shield the external light and improving the stability of the fog screen projection.

[0055] Optionally, the fog screen manufacturing method further comprises:

[0056] Step 222: collecting a fog screen image;

[0057] Step 223: identifying a fog screen diameter of a fog screen upper edge from the fog screen image;

[0058] Step 224: determining a falling speed in response to the fog screen diameter;

[0059] Step 225: determining a falling sequence in response to the falling speed;

[0060] Step 226: determining a lifting stroke in response to the falling sequence;

[0061] Step 227: determining a falling height in response to the lifting stroke and the falling speed;

[0062] Step 228: determining a lifting wind speed in response to the falling height;

[0063] Step 229: controlling a lifting device preset on the vehicle to move according to the lifting stroke and to blow upward according to the lifting wind speed.

[0064] By adopting the technical scheme, the lifting device blows the mist curtain in the downward direction, so that the liquid droplets in the mist curtain are lifted by the rising airflow, and then the falling speed of the liquid droplets is reduced, the time length of the liquid droplets in the air is increased, and then the maintenance time of the mist curtain is increased, and the stability of the mist curtain projection is improved.

[0065] Optionally, the method further comprises a mist curtain recycling method, and the mist curtain recycling method comprises:

[0066] Step 300: determining a stop signal in response to the driving parameter;

[0067] Step 301: determining a recycling stroke in response to the stop signal and the falling sequence;

[0068] Step 302: determining a recycling wind speed in response to the falling height;

[0069] Step 303: controlling a recycling device preset on the vehicle to move according to the recycling stroke and to absorb the mist according to the recycling wind speed.

[0070] By adopting the technical scheme, when the mist curtain projection is turned off, the liquid droplets remaining in the mist curtain are easy to fall to the ground, so that the ground is wet and slippery, the part of the mist curtain close to the ground is sucked by the air suction device, so that the water vapor of the mist curtain is recycled, and the convenience of using the mist curtain is improved.

[0071] Optionally, the mist curtain recycling method further comprises:

[0072] Step 304: determining an edge height in response to the stop signal and the falling speed;

[0073] Step 305: determining a midpoint height in response to the edge height;

[0074] Step 306: determining a throwing direction and a throwing speed in response to the midpoint height;

[0075] Step 307: determining a receiving direction in response to the throwing direction and the throwing speed;

[0076] Step 308: controlling a receiving device preset on the vehicle to turn according to the receiving direction, and controlling a throwing device preset on the vehicle to turn according to the throwing direction and to throw a preset water-absorbing ball according to the throwing speed.

[0077] By adopting the technical scheme, the liquid droplets forming the fog screen are small, and the falling speed is slow. When the fog screen is large, the liquid droplets located at a high position need to fall for a long time. The water-absorbing balls with a hydrophilic surface are shot into the fog screen by the shooting device, so as to absorb the water vapor at the high position of the fog screen, and the convenience of use of the fog screen is improved.

[0078] In a second aspect, the application provides a fog screen projection control system, which adopts the technical scheme as follows:

[0079] A fog screen projection control system comprises:

[0080] A collection module is configured to collect driving parameters, road condition images, ambient temperature, ambient humidity, ambient light intensity, and a fog screen image.

[0081] A memory is configured to store any of the fog screen projection control methods.

[0082] A processor, and the program in the memory can be loaded and executed by the processor.

[0083] By adopting the technical scheme, when a vehicle encounters an emergency, the unmanned aerial vehicle collects the image of the road at a high altitude, so as to select the size of the warning that can clearly display the warning according to the number of vehicles on the road, and form a fog screen for projecting the warning of the corresponding size by the unmanned aerial vehicle, so that different impact ranges of the warning can be selected according to different road conditions, and the convenience of use of the vehicle-mounted unmanned aerial vehicle is improved.

[0084] In summary, the application has at least one of the following beneficial technical effects:

[0085] 1. When a vehicle encounters an emergency, the unmanned aerial vehicle collects the image of the road at a high altitude, so as to select the size of the warning that can clearly display the warning according to the number of vehicles on the road, and form a fog screen for projecting the warning of the corresponding size by the unmanned aerial vehicle, so that different impact ranges of the warning can be selected according to different road conditions, and the convenience of use of the vehicle-mounted unmanned aerial vehicle is improved.

[0086] 2. When a vehicle encounters an emergency, the temperature value of the location of the vehicle is detected in real time, so as to select the amount of water needed to be sprayed to form a stable fog screen at the temperature value, and the humidity value of the location of the vehicle is detected in real time to supplement the insufficient amount of water, so as to manufacture a stable fog screen for projecting the warning of the corresponding size by the unmanned aerial vehicle.

[0087] 3. When the humidity of the location of the vehicle is too high, the liquid droplets sprayed by the unmanned aerial vehicle are easy to contact and fuse with the original liquid droplets in the air to become larger liquid droplets, so that the liquid droplets are difficult to suspend. The humid air is heated by the heating device, so that the larger liquid droplets in the air evaporate and shrink, and then the required fog screen is formed, and the convenience of use of the vehicle-mounted unmanned aerial vehicle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0088] Figure 1 is a flow of a fog screen projection control method Figure One ;

[0089] Figure 2 is a flow of a fog screen projection control method Figure Two ;

[0090] Figure 3 is a flow of a fog screen manufacturing method Figure One ;

[0091] Figure 4 is a flow of a fog screen manufacturing method Figure Two ;

[0092] Figure 5 is a flow of a fog screen manufacturing method Figure Three ;

[0093] Figure 6 is a flow of a fog screen manufacturing method Figure Four ;

[0094] Figure 7 is a flow of a fog screen manufacturing method Figure Five ;

[0095] Figure 8 is a flow of a fog screen recycling method Figure One ;

[0096] Figure 9 is a flow of a fog screen recycling method Figure Two . DETAILED DESCRIPTION

[0097] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application 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 application and should not be used to limit the present application.

[0098] With reference to Figure 1 , a fog screen projection control method comprises:

[0099] Step 100: collecting driving parameters of a vehicle.

[0100] The driving parameters refer to parameters detected in the driving process of the vehicle, such as the vehicle speed, the engine speed, the engine temperature, the vehicle light signal, etc. The driving parameters can be directly called from the vehicle central control system. The calling method of the driving parameters is selected by the staff according to the actual situation, which is not described herein.

[0101] Step 101: judging whether the vehicle has a fault in response to the driving parameters.

[0102] The fault refers to a situation requiring rescue such as vehicle failure, traffic accident, etc. The vehicle failure can be determined when the double flashing light signal in the vehicle light signal in the driving parameter is turned on. The determination method of the fault is selected by the staff according to the actual situation, which is not described herein.

[0103] Step 102: When the vehicle fails, control the preset unmanned aerial vehicle to collect the road condition image.

[0104] The unmanned aerial vehicle refers to an unmanned aerial device mounted on the vehicle for making a fog screen. The unmanned aerial vehicle is mounted with a camera for collecting images, and is also mounted with a spray head for spraying water mist and a water tank for storing liquid. The unmanned aerial vehicle sprays the liquid in the water tank in the form of water mist through the spray head to form a fog screen. The image is projected onto the fog screen by the projection system on the vehicle. The unmanned aerial vehicle is selected by the staff according to the actual situation, which is not described herein. The road condition image refers to the picture of the road of the road section where the vehicle is located. The road condition image can be collected vertically downward by the camera on the unmanned aerial vehicle after the unmanned aerial vehicle is controlled to ascend. The collection method of the road condition image is selected by the staff according to the actual situation, which is not described herein.

[0105] Step 103: Identify the number of vehicles from the road condition image.

[0106] 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 identification method of the number of vehicles is well known to those skilled in the art, which is not described herein.

[0107] Step 104: Determine the projection magnification in response to the number of vehicles.

[0108] The projection magnification refers to the size magnification of the warning sign required for the current road condition. When there are many vehicles, it is difficult to view the standard size warning sign for the vehicles far away. At this time, a larger projection magnification is taken 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 recording different numbers of vehicles and their corresponding projection magnifications. The warning sign refers to a fault warning for warning other vehicles that the vehicle has failed. The warning sign generally adopts a red hollow triangle. The warning sign is selected by the staff according to the actual situation, which is not described herein.

[0109] Step 105: Determine the warning height in response to the projection magnification.

[0110] The warning height refers to the height value of the upper edge of the fog screen required for displaying the warning sign of the projection magnification. The calculation method of the warning height is well known to those skilled in the art, which is not described herein.

[0111] Step 106: controlling the preset UAV flight altitude based on the warning height, and controlling the preset UAV to emit a fog screen and project a failure warning based on the projection magnification.

[0112] When the vehicle encounters an emergency, the UAV collects images of the road at a high altitude, so as to select a size that can clearly display a warning according to the number of vehicles on the road, and the UAV forms a fog screen for projecting a warning of the corresponding size, so that different warnings with different influence ranges can be selected according to different road conditions, and the convenience of using the vehicle-mounted UAV is improved.

[0113] With reference to Figure 2 A fog screen projection control method further includes:

[0114] Step 107: collecting an ambient temperature when the vehicle fails.

[0115] The ambient temperature refers to the air temperature at the location of the vehicle, and the ambient temperature can be collected by a temperature sensor fixed on the vehicle. The collection method of the ambient temperature is selected by the staff according to the actual situation, and is not described here.

[0116] Step 108: determining a maintenance duration of the fog screen in response to the ambient temperature.

[0117] The maintenance duration refers to the minimum duration that the fog screen can be maintained at the ambient temperature. The maintenance duration can be obtained from a maintenance data table, which is a data table recording different ambient temperatures and their corresponding maintenance durations.

[0118] Step 109: determining a fog screen water amount in response to the projection magnification.

[0119] The fog screen water amount refers to the total water amount of the fog screen required to display a warning mark of the projection magnification. The fog screen water amount corresponding to the projection magnification can be obtained from a water amount relationship table, which is a data table recording different projection magnifications and their corresponding fog screen water amounts.

[0120] Step 110: determining a maintenance water amount in response to the fog screen water amount and the maintenance duration, and collecting an ambient humidity.

[0121] The maintenance water amount refers to the water amount required to maintain the fog screen per unit time. The maintenance water amount can be calculated as the quotient of the fog screen water amount and the maintenance duration.

[0122] The 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 collection method of the ambient humidity is selected by the staff according to the actual situation, and is not described here.

[0123] Step 111: determining a replenishment water amount in response to the maintenance water amount and the ambient humidity.

[0124] The supplementary water amount refers to the water amount that needs to be supplemented, which can be obtained by first obtaining the volume value of the fog screen according to the projection magnification, then calculating the product of the ambient humidity and the volume value as the existing water amount, and finally calculating the difference between the maintaining water amount and the existing water amount as the supplementary water amount.

[0125] Step 112: determining the spraying pressure in response to the maintaining water amount.

[0126] The spraying pressure refers to the pressure value required for spraying the fog screen for displaying the warning sign with the projection magnification, which can be obtained from the pressure relationship table corresponding to the maintaining water amount. The pressure relationship table refers to a data table recording different maintaining water amounts and the corresponding spraying pressures.

[0127] Step 113: controlling the preset unmanned aerial vehicle to spray the water mist with the supplementary water amount at the warning height according to the spraying pressure to form the fog screen.

[0128] When the vehicle encounters an emergency, the temperature value of the location where the vehicle is located is detected in real time, so as to select the water amount sprayed to form a stable fog screen at the temperature value, and the humidity value of the location where the vehicle is located is detected in real time to supplement the insufficient water amount, so as to manufacture a stable fog screen for projecting a corresponding size of warning by the unmanned aerial vehicle.

[0129] Reference Figure 3 , the fog screen manufacturing method comprises:

[0130] Step 200: determining the humidity threshold value in response to the maintaining water amount.

[0131] The humidity threshold value refers to the minimum humidity value after spraying the liquid with the maintaining water amount to form the fog screen, which can be obtained from the humidity relationship table corresponding to the maintaining water amount. The humidity relationship table refers to a data table recording different maintaining water amounts and the corresponding humidity threshold values.

[0132] Step 201: identifying the droplet diameter from the road condition image when the ambient humidity is higher than the humidity threshold value.

[0133] The ambient humidity higher than the humidity threshold value represents that the water vapor in the air is sufficient to form the fog screen. The droplet diameter refers to the maximum diameter of the droplet in the air at the location where the vehicle is located, which can be obtained by image recognition technology from the road condition image. The identification method of the droplet diameter is well known to those skilled in the art, and will not be described here.

[0134] Step 202: determining the fog making position in response to the projection magnification when the droplet diameter exceeds the preset fog screen threshold value.

[0135] The mist curtain threshold refers to the maximum diameter of the liquid droplets forming the mist curtain, which is selected by the staff according to the actual situation, and will not be described here. The liquid droplet diameter exceeding the mist curtain threshold represents that the liquid droplets in the air are too large, which makes it difficult for the liquid droplets to stably suspend, thereby making it difficult to form a mist curtain. The mist making position refers to the center point position of the mist curtain. The determination method of the mist making position is known to those skilled in the art, and will not be described here.

[0136] Step 203: Control the preset unmanned aerial vehicle to fly to the mist making position, and determine the mist making temperature in response to the liquid droplet diameter and the environmental temperature.

[0137] The mist making temperature refers to the temperature value required to evaporate and reduce the liquid droplets with the liquid droplet diameter to the mist curtain threshold. The mist making temperature corresponding to the liquid droplet diameter and the environmental temperature can be queried from the temperature relationship table. The temperature relationship table refers to a data table recording different liquid droplet diameters, environmental temperatures and their corresponding mist making temperatures.

[0138] Step 204: Control the heating device preset on the unmanned aerial vehicle to heat according to the mist making temperature.

[0139] When the humidity of the location of the vehicle is too high, the liquid droplets sprayed by the unmanned aerial vehicle are easy to contact and merge with the original liquid droplets in the air to become larger liquid droplets, thereby making it difficult for the liquid droplets to suspend. By heating the humid air with the heating device, the larger liquid droplets in the air are evaporated and reduced, thereby forming the required mist curtain, and improving the convenience of using the vehicle-mounted unmanned aerial vehicle.

[0140] Reference Figure 4 The mist making method further comprises:

[0141] Step 205: When the maintenance water amount exceeds the preset flow threshold, the route orientation is identified from the road condition image.

[0142] The flow threshold refers to the maximum water amount of the mist that can naturally flow to form a mist curtain. When the liquid of the maintenance water amount is evaporated to form mist, the mist is easy to naturally spread. When the mist is too much, it is easy to cause the mist to accumulate and not to spread in time, thereby making it difficult for the mist to quickly form a mist curtain. The flow threshold is selected by the staff according to the actual situation, and will not be described here. The maintenance water amount exceeding the flow threshold represents that the mist formed by the evaporation of the liquid is too much. The route orientation refers to the direction of the road where the vehicle is located. The route orientation can be identified from the road condition image by image recognition technology. The identification method of the route orientation is known to those skilled in the art, and will not be described here.

[0143] Step 206: Control the preset unmanned aerial vehicle to turn according to the route orientation, and determine the diffusion wind pressure in response to the maintenance water amount.

[0144] The blowing device is a device for blowing air to the heating device to drive the mist generated from the heating device to spread out. The blowing device is symmetrically arranged on both sides of the heating device, so as to blow air to both sides of the heating device at the same time to drive the mist to spread out uniformly. The blowing device is selected by the staff according to the actual situation, and will not be described here.

[0145] The diffusion air pressure is the air pressure value for driving the mist generated from the heating device to spread out in time. The diffusion air pressure and the corresponding diffusion air pressure can be obtained from the air pressure relationship table. When the water amount is large, the speed of the generated mist is fast, and a large air pressure is used to make the mist spread out. The air pressure relationship table is a data table recording different water amounts and corresponding diffusion air pressures.

[0146] Step 207: determining the cooling coefficient in response to the diffusion air pressure.

[0147] The cooling coefficient is a value for showing the cooling effect of the diffusion air pressure. When the blowing device blows air to the heating device, it is easy to send the cooler air outside to the heating device, so as to cause the temperature around the heating device to be lower. The larger the diffusion air pressure, the larger the cooling coefficient. The diffusion air pressure and the corresponding cooling coefficient can be obtained from the cooling relationship table. The cooling relationship table is a data table recording different diffusion air pressures and corresponding cooling coefficients.

[0148] Step 208: updating the mist making temperature in response to the cooling coefficient.

[0149] Generally, the product of the cooling coefficient and the mist making temperature is calculated as the new mist making temperature.

[0150] Step 209: controlling the blowing device symmetrically preset on both sides of the heating device to blow air to the heating device according to the diffusion air pressure.

[0151] When the required mist curtain area is large, the mist generated by the heating device is easy to spread out uniformly in a spherical shape around the heating device. At this time, the blowing device blows air to the heating device from both sides of the heating device to drive the mist to spread out flatly to both sides, thereby improving the convenience of mist curtain manufacturing.

[0152] Referring to Figure 5 , the mist curtain manufacturing method further comprises:

[0153] Step 210: collecting the ambient light intensity when the vehicle fails.

[0154] The ambient light intensity is the light intensity value of the location of the vehicle. The ambient light intensity can be collected by a photosensitive sensor fixed on the vehicle. The collection method of the ambient light intensity is selected by the staff according to the actual situation, and will not be described here.

[0155] Step 211: determining the number of shielding layers in response to the ambient light intensity when the ambient light intensity exceeds the preset projection threshold.

[0156] The projection threshold refers to the maximum ambient light intensity at which the fog screen projection can be clearly displayed. The projection threshold is selected by the staff according to the actual situation and will not be described here. When the ambient light intensity exceeds the projection threshold, it means that the external light has a greater impact on the fog screen projection, which can easily lead to unclear imaging on the fog screen. The number of shielding layers refers to the minimum number of fog screens that can reduce the impact of external light on fog screen imaging. The higher the ambient light intensity, the higher the number of shielding layers required. The number of shielding layers corresponding to the ambient light intensity can be obtained from the shielding relationship table, which is a data table recording different ambient light intensities and their corresponding shielding layers.

[0157] Step 212: determining the shielding distance in response to the number of shielding layers and identifying the strong light direction from the road condition image.

[0158] The shielding distance refers to the distance between the fog screens used to shield external light. When the fog screens are too close, they can easily mix, reducing the three-dimensional shielding advantage of the multi-layer structure. When the fog screens are too far apart, they can easily produce the phenomenon of "light spot leakage", reducing the overall shielding effect. The shielding distance can be obtained from the distance relationship table, which is a data table recording different numbers of shielding layers and their corresponding shielding distances.

[0159] Step 213: determining the shielding position in response to the strong light direction, the number of shielding layers, and the shielding distance.

[0160] The shielding position refers to the midpoint position of the upper edge of the multi-layer fog screen used to shield external light. The determination method of the shielding position is known to those skilled in the art and will not be described here.

[0161] Step 214: controlling the preset unmanned aerial vehicle to fly to the shielding position and create a fog screen.

[0162] When the external light is too strong, the projected light can be easily disturbed by the external light, leading to unclear imaging on the fog screen. At this time, multiple unmanned aerial vehicles are used to create multiple layers of fog screens to block the direct imaging of strong light, and multiple layers of fog screens are used to improve the clarity and stability of fog screen projection.

[0163] Reference Figure 6 The fog screen manufacturing method further comprises:

[0164] Step 215: determining the shielding distance in response to the number of shielding layers and the shielding distance.

[0165] The blocking distance refers to the farthest distance value between the fog screens, i.e. the distance value between the imaged fog screen and the outermost blocking fog screen. The product of the blocking layer number and the blocking interval can be calculated as the blocking distance.

[0166] Step 216: When the blocking distance exceeds the preset distance threshold, identifying the ambient light color from the road condition image.

[0167] The distance threshold refers to the farthest distance value that the fog screen can extend. When the distance value between the fog screens is too far, it is easy to cause the fog screen to affect other vehicles, resulting in the situation that the field of view of other vehicles is blocked. The distance threshold is selected by the staff according to the actual situation, and is not described here. The blocking distance exceeding the distance threshold represents that the fog screen is easy to affect other vehicles. The ambient light color refers to the main color of external light. The ambient light color can be determined by image recognition technology. The identification method of the ambient light color is well known to those skilled in the art, and is not described here.

[0168] Step 217: Determining the suppression light color in response to the ambient light color.

[0169] The suppression light color refers to the color used to absorb the ambient light color. The fog screen has the strongest absorption and the best blocking effect on light complementary to its own color (such as red fog screen on blue light, blue fog screen on yellow light), and has the weakest absorption and the worst blocking effect on the same color light. The suppression light color can be obtained from the suppression relationship table. The suppression relationship table refers to a data table recording different ambient light colors and their corresponding suppression light colors and suppression coefficients.

[0170] Step 218: Determining the suppression coefficient in response to the suppression light color and the ambient light color.

[0171] The suppression coefficient refers to a numerical value used to show the suppression effect of the suppression light color on the ambient light color. The stronger the suppression effect, the larger the suppression coefficient. The suppression coefficient can be obtained from the suppression relationship table.

[0172] Step 219: Updating the blocking layer number in response to the suppression coefficient, and selecting the suppression reagent in response to the suppression light color.

[0173] Generally, the quotient of the blocking layer number and the suppression coefficient is calculated as the new blocking layer number. The updating method of the blocking layer number is selected by the staff according to the actual situation, and is not described here. The suppression reagent refers to a reagent used to dye the liquid in the unmanned aerial vehicle tank. The selection method of the suppression reagent is selected by the staff according to the actual situation, and is not described here.

[0174] Step 220: Determining the blocking number in response to the blocking position.

[0175] The blocking number refers to the number of the unmanned aerial vehicle at the blocking position. The determination method of the blocking number is well known to those skilled in the art, and is not described here.

[0176] Step 221: based on the blocking number, control the preset unmanned aerial vehicle to inject the inhibitory reagent into the water tank, and generate the fog screen of the inhibitory color at the blocking position.

[0177] When the external light is too strong, the number of fog screen layers required to block the external light is too much. At this time, the color of the fog screen is adjusted to adjust the blocking ability of the fog screen to the 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.

[0178] Reference Figure 7 , the fog screen manufacturing method further comprises:

[0179] Step 222: collect the fog screen image.

[0180] The fog screen image refers to the picture of the upper edge of the fog screen, which can be collected by the camera on the unmanned aerial vehicle. The collection method of the fog screen image is selected by the staff according to the actual situation, which is not described here.

[0181] Step 223: identify the fog screen diameter of the upper edge of the fog screen from the fog screen image.

[0182] The fog screen diameter refers to the diameter of the droplet of the upper edge of the fog screen. The fog screen diameter can be determined by image recognition technology. The identification method of the fog screen diameter is common knowledge in the art, which is not described here.

[0183] Step 224: determine the falling speed in response to the fog screen diameter.

[0184] The falling speed refers to the speed value of the water droplet falling. The greater the diameter of the water droplet, the greater the weight, and the faster the falling speed. The determination method of the falling speed is common knowledge in the art, which is not described here.

[0185] Step 225: determine the falling order in response to the falling speed.

[0186] The falling order refers to the order of the water droplet falling to the ground, that is, the order of the corresponding ground position after arranging the falling speed from large to small. The ground position refers to the position of the droplet of the upper edge of the fog screen falling to the ground. The determination method of the falling order and the ground position is common knowledge in the art, which is not described here.

[0187] Step 226: determine the lifting stroke in response to the falling order.

[0188] The lifting device refers to the device for blowing to the fog screen to lift the fog screen, the vehicle is provided with a guide rail for the movement of the lifting device, the direction of the guide rail is generally perpendicular to the driving direction of the vehicle, the lifting device is selected by the staff according to the actual situation, which is not described here. The lifting stroke refers to the route of the lifting device moving according to the falling sequence, and the determination method of the lifting stroke is known to those skilled in the art, which is not described here.

[0189] Step 227: determining the falling height in response to the lifting stroke and the falling speed.

[0190] The falling height refers to the height value of the liquid droplets at the corresponding position when the lifting device moves to the ground position according to the lifting stroke. The time length of moving to the ground position can be calculated according to the lifting stroke, and the falling height can be calculated according to the time length and the falling speed. The calculation method of the falling height is known to those skilled in the art, which is not described here.

[0191] Step 228: determining the lifting wind speed in response to the falling height.

[0192] The lifting wind speed refers to the wind speed value required by the lifting device to blow to lift the liquid droplets. The lower the falling height, the greater the lifting wind speed required to drive the liquid droplets to rise. The lifting wind speed can be obtained from the lifting relationship table, which is a data table recording different falling heights and their corresponding lifting wind speeds.

[0193] Step 229: controlling the lifting device preset on the vehicle to move according to the lifting stroke and blow upward according to the lifting wind speed.

[0194] By blowing to the fog screen in the downward direction through the lifting device, the liquid droplets in the fog screen are lifted by the upward airflow, thereby reducing the falling speed of the liquid droplets, thereby increasing the time length of the liquid droplets in the air, and thereby improving the maintenance time of the fog screen and the stability of the fog screen projection.

[0195] Reference Figure 8 , the fog screen recycling method comprises:

[0196] Step 300: determining the stop signal in response to the driving parameter.

[0197] The stop signal refers to the signal for stopping the fog screen projection. The off signal of the vehicle double flash light can be used as the stop signal. The stop signal is selected by the staff according to the actual situation, which is not described here.

[0198] Step 301: determining the recycling stroke in response to the stop signal and the falling sequence.

[0199] The recovery device refers to a device for inhaling air from the mist curtain to recover water vapor in the mist curtain. The recovery device is selected by the staff according to the actual situation, and is not described here. The recovery route refers to the route of the recovery device inhaling water vapor in turn according to the falling order. The determination method of the recovery route is referred to the determination method of the lifting route.

[0200] Step 302: determining the recovery wind speed in response to the falling height.

[0201] The recovery wind speed refers to the wind speed value required by the recovery device to recover water vapor. The lower the falling height, the greater the recovery wind speed 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 recording different falling heights and their corresponding recovery wind speeds.

[0202] Step 303: controlling the recovery device preset on the vehicle to move according to the recovery route and inhale mist according to the recovery wind speed.

[0203] When the mist curtain projection is turned off, the liquid droplets remaining in the mist curtain are easy to fall to the ground, causing the ground to be wet and slippery. By using the air suction device to suck the part of the mist curtain close to the ground, the water vapor of the mist curtain is recovered, and the convenience of using the mist curtain is improved.

[0204] Reference Figure 9 The mist curtain recovery method further comprises:

[0205] Step 304: determining the edge height in response to the stop signal and the falling speed.

[0206] The edge height refers to the height value of each part of the upper edge of the mist curtain. The initial height of the upper edge of the mist curtain can be identified from the mist curtain image, and the dynamic height value of the upper edge of the mist curtain can be determined in combination with the falling speed. The determination method of the edge height is well known to those skilled in the art, and is not described here.

[0207] Step 305: determining the midpoint height in response to the edge height.

[0208] The midpoint height refers to the height value of the midpoint of the upper edge of the mist curtain. The determination method of the midpoint height is well known to those skilled in the art, and is not described here.

[0209] Step 306: determining the projection direction and the projection speed in response to the midpoint height.

[0210] The water-absorbing ball refers to a solid ball covered by a hydrophilic material on the surface, when the water-absorbing ball contacts with a water droplet, the water droplet is easy to adhere to the hydrophilic material on the surface of the water-absorbing ball, the throwing device refers to a device for throwing the water-absorbing ball, and the receiving device refers to a device for receiving the water-absorbing ball thrown by the throwing device, wherein the throwing device and the recovery device are symmetrically arranged on both sides of the top of the vehicle, and the water-absorbing ball, the throwing device and the receiving device are selected by the staff according to the actual situation, which will not be repeated here.

[0211] The throwing direction refers to the direction of the throwing device, and the throwing speed refers to the speed of the throwing device shooting the water-absorbing ball, which can be fitted by the position of the throwing device, the position of the midpoint of the upper edge and the position of the recovery device to obtain a parabola, and then the parabola is used to calculate the throwing direction and the throwing speed, wherein the positions of the throwing device and the recovery device can be input by the staff in advance, since the throwing device and the recovery device are symmetrically arranged and vertically flown when the unmanned aerial vehicle is used to make the fog screen, the position of the midpoint of the upper edge is the midpoint position between the throwing device and the recovery device, and the position of the midpoint height, and the determination method of the throwing direction and the throwing speed is selected by the staff according to the actual situation, which will not be repeated here.

[0212] Step 307: determining the receiving direction in response to the throwing direction and the throwing speed.

[0213] The receiving direction refers to the direction of the receiving device receiving the water-absorbing ball, and the receiving direction can be fitted by the position of the throwing device, the position of the midpoint of the upper edge and the position of the recovery device to obtain a parabola, and then the parabola is used to calculate the throwing direction and the throwing speed, wherein the determination method of the receiving direction is selected by the staff according to the actual situation, which will not be repeated here.

[0214] Step 308: controlling the receiving device preset on the vehicle to turn to the receiving direction, and controlling the throwing device preset on the vehicle to turn to the throwing direction and to throw the preset water-absorbing ball at the throwing speed.

[0215] The liquid droplets constituting the fog screen are small, and the falling speed is slow, when the fog screen is large, the liquid droplets located at a high position need to wait for a long time to fall, the water-absorbing ball with a hydrophilic surface is thrown into the fog screen by the throwing device, so as to absorb the water vapor at a high position of the fog screen, and the convenience of using the fog screen is improved.

[0216] Based on the same inventive concept, the embodiments of the present application provide a fog screen projection control system, which adopts the following technical scheme:

[0217] A fog screen projection control system comprises:

[0218] The acquisition module is used to acquire the driving parameter, the road condition image, the environment temperature, the environment humidity, the environment light intensity and the fog screen image;

[0219] The memory is used to store any one of the fog screen projection control methods.

[0220] a processor, the program in the memory can be loaded and executed by the processor.

[0221] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of functional modules is taken as an example, and in actual application, the above-mentioned functions can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0222] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the concept of the present application shall be deemed to fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the art, some improvements and refinements without departing from the principles of the present application shall also be deemed to fall within the protection scope of the present application.

Claims

1. A mist projection control method characterized by, The method comprises: Step 100: collecting driving parameters of a vehicle; Step 101: determining whether the vehicle has a fault in response to the driving parameters; Step 102: controlling a preset unmanned aerial vehicle to collect road condition images when the vehicle has a fault; Step 103: identifying a number of vehicles from the road condition images; 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: controlling the preset unmanned aerial vehicle to fly to the warning height and to emit a fog screen and project a fault warning in response to the projection magnification. The method further comprises: Step 107: collecting an ambient temperature when the vehicle has a fault; Step 108: determining a maintenance duration of the fog screen in response to the ambient temperature; Step 109: determining a fog screen water amount in response to the projection magnification; Step 110: determining a maintenance water amount in response to the fog screen water amount and the maintenance duration, and collecting an ambient humidity; Step 111: determining a replenishment water amount in response to the maintenance water amount and the ambient humidity; Step 112: determining a spraying pressure in response to the maintenance water amount; Step 113: controlling the preset unmanned aerial vehicle to spray the replenishment water amount of water mist at the spraying pressure at the warning height to form the fog screen. The method further comprises a fog screen manufacturing method, which comprises: Step 200: determining a humidity threshold in response to the maintenance water amount; Step 201: identifying a droplet diameter from the road condition images when the ambient humidity is higher than the humidity threshold; Step 202: determining a fogging position in response to the projection magnification when the droplet diameter exceeds a preset fog screen threshold; Step 203: controlling the preset unmanned aerial vehicle to fly to the fogging position, and determining a fogging temperature in response to the droplet diameter and the ambient temperature; Step 204: controlling a heating device preset on the unmanned aerial vehicle to heat at the fogging temperature.

2. The method of claim 1, wherein, The fog screen manufacturing method further comprises: Step 205: identifying a route orientation from the road condition images when the maintenance water amount exceeds a preset flow threshold; Step 206: controlling the preset unmanned aerial vehicle to turn according to the route orientation, and determining a diffusion air pressure in response to the maintenance water amount; Step 207: determining a cooling coefficient in response to the diffusion air pressure; Step 208: updating the fogging temperature in response to the cooling coefficient; Step 209: controlling air blowing devices preset on both sides of the heating device to blow air to the heating device at the diffusion air pressure.

3. A mist projection control method according to claim 2, characterized in that, The fog screen manufacturing method further comprises: Step 210: collecting an ambient light intensity when the vehicle has a fault; Step 211: determining a number of shielding layers in response to the ambient light intensity when the ambient light intensity exceeds a preset projection threshold; Step 212: determining a shielding interval in response to the number of shielding layers, and identifying a strong light direction from the road condition images; Step 213: determining a shielding position in response to the strong light direction, the number of shielding layers, and the shielding interval; Step 214: controlling the preset unmanned aerial vehicle to fly to the shielding position and to manufacture the fog screen.

4. A mist projection control method according to claim 3, characterized in that, The fog screen manufacturing method further comprises: Step 215: determining a shielding distance in response to the number of shielding layers and the shielding interval; Step 216: identifying an ambient light color from the road condition image when the occlusion distance exceeds a preset distance threshold; Step 217: determining an inhibiting light color in response to the ambient light color; Step 218: determining an inhibiting coefficient in response to the inhibiting light color and the ambient light color; Step 219: updating the occlusion layer number in response to the inhibiting coefficient, and selecting an inhibiting reagent in response to the inhibiting light color; Step 220: determining an occlusion number in response to the occlusion position; Step 221: controlling a preset unmanned aerial vehicle to inject the inhibiting reagent into the water tank at the occlusion position based on the occlusion number, and generating a fog screen of the inhibiting light color at the occlusion position.

5. A mist projection control method according to claim 4, characterized in that, The fog screen generation method further comprises: Step 222: collecting a fog screen image; Step 223: identifying a fog screen diameter of a fog screen upper edge from the fog screen image; Step 224: determining a falling speed in response to the fog screen diameter; Step 225: determining a falling sequence in response to the falling speed; Step 226: determining a lifting stroke in response to the falling sequence; Step 227: determining a falling height in response to the lifting stroke and the falling speed; Step 228: determining a lifting wind speed in response to the falling height; Step 229: controlling a lifting device preset on the vehicle to move according to the lifting stroke and blow upward according to the lifting wind speed.

6. A mist projection control method according to claim 5, characterized in that, The fog screen generation method further comprises: 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 falling height; Step 303: controlling a recovery device preset on the vehicle to move according to the recovery stroke and absorb fog according to the recovery wind speed.

7. A mist projection control method according to claim 6, characterized in that, The fog screen generation 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: determining a projection direction and a projection speed in response to the midpoint height; Step 307: determining a receiving direction in response to the projection direction and the projection speed; Step 308: controlling a receiving device preset on the vehicle to turn according to the receiving direction, and controlling a projection device preset on the vehicle to turn according to the projection direction and project a preset water-absorbing ball according to the projection speed.

8. A mist projection control system characterized by, The fog screen generation method further comprises: a collection module for collecting driving parameters, road condition images, ambient temperature, ambient humidity, ambient light intensity, and fog screen images; a memory for storing a fog screen projection control method according to any one of claims 1 to 7; a processor, and programs in the memory can be loaded and executed by the processor.

Images