A traffic safety warning system and method based on V2X in ice and snow conditions

Abstract

The application provides a traffic safety warning system and method based on V2X under ice and snow conditions, wherein the system comprises a roadside intelligent device, a V2X intelligent device and a vehicle-mounted intelligent device; the roadside intelligent device comprises a roadside sensing unit, an information processing unit, a data storage unit, a warning information generation unit, an information publishing and display unit, a V2X intelligent device interaction unit and a cloud interaction unit; the V2X intelligent device comprises a roadside intelligent device interaction unit, a roadside communication unit and a vehicle-mounted intelligent device interaction unit; and the vehicle-mounted intelligent device comprises a vehicle-mounted V2X intelligent device interaction unit, a vehicle-mounted positioning unit, a vehicle-mounted information processing unit and a vehicle-mounted information publishing and display unit. The application collects roadside information by using various roadside sensing devices, effectively improves the accuracy of information collection and corresponding parameter calibration, comprehensively estimates the risk level by combining real-time sensing information and historical information of the information storage unit, and improves the scientificity of the traffic safety warning system under ice and snow conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to a traffic safety warning system and method based on V2X under ice and snow conditions, belonging to the technical field of traffic warning. BACKGROUND

[0002] In some northern regions of China, ice and snow weather often occurs in winter, making the road slippery, and vehicles are prone to skidding or losing control during driving, especially on steep slopes, curves and overpasses, where the vehicle's grip is significantly weakened, and the driver has difficulty controlling the vehicle. Secondly, snow weather can reduce road visibility, causing visual disturbances for drivers. The flying of snowflakes and the covering of snow can affect the driver's judgment of the road conditions ahead, especially at night or in poor visibility conditions during the day, making it difficult for drivers to timely detect obstacles or other vehicles, thereby increasing the risk of traffic accidents. In addition, snow weather can also cause vehicle malfunctions, such as brake failure, which can cause the driver to lose control of the vehicle, increasing the risk of traffic accidents.

[0003] Currently, the government and traffic management departments have taken a series of measures. For example, in terms of traffic management, road rescue, traffic control, and publicity and education are used. In terms of early warning technology, the meteorological department will timely issue ice and snow weather warning information, including temperature drop, snowfall, icing, etc., and suggest the public to avoid unnecessary travel or take special safety measures.

[0004] However, the current meteorological warning information has a lag and is not real-time, and traditional warning can achieve certain effect, but it is difficult to monitor and warn the road conditions and driving conditions under ice and snow conditions in real time. SUMMARY

[0005] The present application is to solve the technical problem that the driver's friction coefficient is insufficient due to ice and snow conditions during driving, thereby causing traffic accidents, and further proposes a traffic safety warning system and method based on V2X under ice and snow conditions.

[0006] The technical solution adopted by the present application to solve the above problems is: the present application proposes a traffic safety warning system based on V2X under ice and snow conditions, which comprises:

[0007] Roadside intelligent device, V2X intelligent device, vehicle-mounted intelligent device;

[0008] The roadside intelligent device includes a roadside perception unit, an information processing unit, a data storage unit, a warning information generation unit, an information publishing and display unit, an interaction unit with the V2X intelligent device, and a cloud interaction unit;

[0009] The V2X intelligent device includes an interaction unit with the roadside intelligent device, a roadside communication unit, and an interaction unit with the vehicle-mounted intelligent device;

[0010] The vehicle-mounted intelligent device comprises a vehicle-mounted V2X intelligent device interaction unit, a vehicle-mounted positioning unit, a vehicle-mounted information processing unit, and a vehicle-mounted information publishing and display unit.

[0011] Optionally, the road-side sensing unit of the road-side intelligent device comprises a road surface state sensor, a high-definition monitoring camera, and an integrated weather station road-side sensing device.

[0012] The information publishing and display unit comprises a road-side variable information board and a road-side broadcast device.

[0013] Optionally, the cloud interaction unit of the road-side intelligent device is connected to a traffic management department through an optical fiber, and is configured to transmit the processed information from the information publishing and display unit to the traffic management department.

[0014] Optionally, the vehicle-mounted positioning unit of the vehicle-mounted intelligent device comprises a Beidou satellite navigation system and a GPS global positioning system.

[0015] The vehicle-mounted information publishing and display unit comprises a warning information prompting system.

[0016] Optionally, the road-side intelligent device and the V2X intelligent device are connected to each other through the V2X short-range direct communication wireless connection between the V2X intelligent device interaction unit and the road-side intelligent device interaction unit, and are configured to perform internal data transmission.

[0017] The V2X intelligent device and the vehicle-mounted intelligent device are connected to each other through the V2X short-range direct communication wireless connection between the vehicle-mounted intelligent device interaction unit and the vehicle-mounted V2X intelligent device interaction unit, and are configured to perform internal data transmission.

[0018] A traffic safety warning method based on V2X under ice and snow conditions comprises the following steps.

[0019] Step 1: Real-time acquisition of road-side information based on a road-side intelligent device.

[0020] Step 2: The information processing unit receives the road-side information and judges the road-side information, selects a corresponding warning model to preliminarily process the road-side information, and stores the preliminarily processed road-side information to a data storage unit.

[0021] Step 3: The warning information generation unit calibrates the road surface friction coefficient, the ice and snow distribution coefficient, and the correction coefficient according to the preliminarily processed road-side information, and determines the traffic warning level under the current ice and snow conditions.

[0022] Step 4: The information publishing and display unit warns the entering vehicle based on the traffic warning level under the current ice and snow conditions.

[0023] Optionally, the road side information in step 1 includes current road weather information, road surface state information, road surface ice and snow distribution information, off-road state information, and traffic flow information.

[0024] Optionally, the step of warning the entering vehicle in step 4 includes:

[0025] warning the vehicle loaded with the intelligent vehicle device based on the V2X intelligent vehicle device, the road side variable information board, the road side broadcast device and the modern digital media;

[0026] warning the vehicle not loaded with the intelligent vehicle device based on the road side variable information board, the road side broadcast device and the modern digital media.

[0027] Optionally, the step of warning based on the V2X intelligent vehicle device includes: converting the road side information preliminarily processed by the road side intelligent device into standard V2X information through the road side intelligent device interaction unit in the V2X intelligent device, obtaining the position of the vehicle in real time based on the vehicle positioning unit in the intelligent vehicle device, and distributing the standard V2X information to the vehicles within the preset range, the vehicle processes the standard V2X information through the vehicle information processing unit in the intelligent vehicle device, and then performs real-time warning through the vehicle information publishing and display unit;

[0028] The step of warning based on the road side variable information board includes: converting the preliminarily processed road side information into visual information based on the warning information generation unit in the road side intelligent device, and displaying the visual information through the road side variable information board to perform real-time warning on the passing vehicle;

[0029] The step of warning based on the road side broadcast device includes: converting the preliminarily processed road side information into auditory information based on the warning information generation unit in the road side intelligent device, and broadcasting the auditory information through the road side broadcast device to perform real-time warning on the passing vehicle;

[0030] The step of warning based on the modern digital media includes: sending the preliminarily processed road side information and the traffic warning level to the traffic management department based on the cloud interaction unit in the road side intelligent device, and warning the vehicles on the road section by the traffic management department through frequency modulation broadcast and WeChat public number.

[0031] The beneficial effects of the present application are:

[0032] 1. The present application adopts various road side sensing devices to collect information, effectively improving the accuracy of information collection and corresponding parameter calibration.

[0033] 2. The present application combines real-time sensing information and historical information of the information storage unit to comprehensively estimate the risk level, effectively improving the scientificity of the traffic safety warning system under ice and snow conditions.

[0034] 3. The application uses V2X short-range direct communication to quickly process and transmit information and data, effectively improving the immediacy of traffic safety warning in ice and snow weather.

[0035] 4. The application uses a combination of multiple warning methods to remind vehicles within a preset range, effectively improving the universality of warning for drivers with different driving habits.

[0036] 5. The application considers the operation and maintenance of equipment under ice and snow conditions, effectively improving the stability of the overall warning system and warning method. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The structural block diagram of the roadside intelligent device provided for the example of the application is shown in the figure;

[0038] Figure 2 The data processing flowchart of the roadside intelligent device provided for the example of the application is shown in the figure;

[0039] Figure 3 The structural block diagram of the roadside sensing unit determining ice and snow conditions provided for the example of the application is shown in the figure;

[0040] Figure 4 The structural block diagram of the warning method selection under different warning levels provided for the example of the application is shown in the figure;

[0041] Figure 5 The traffic safety warning method flowchart under ice and snow conditions provided for the example of the application is shown in the figure;

[0042] Figure 6 The V2X intelligent vehicle warning method flowchart provided for the example of the application is shown in the figure;

[0043] Figure 7 The roadside variable message board warning method flowchart provided for the example of the application is shown in the figure;

[0044] Figure 8 The roadside broadcast warning method flowchart provided for the example of the application is shown in the figure;

[0045] Figure 9 The modern digital media warning method flowchart provided for the example of the application is shown in the figure;

[0046] Figure 10 The warning method flowchart after different types of vehicles enter the preset range provided for the example of the application is shown in the figure. EMBODIMENT

[0047] COMBINATION Figures 1-10 The embodiment is described, and the embodiment of the application provides a traffic safety warning system based on V2X under ice and snow conditions, which includes roadside intelligent equipment, V2X intelligent equipment and vehicle-mounted intelligent equipment.

[0048] As Figure 1 shown, the roadside intelligent device includes a roadside perception unit, an information processing unit, a data storage unit, a pre-warning information generation unit, an information publishing and display unit, a V2X intelligent device interaction unit, and a cloud interaction unit.

[0049] The information processing unit processes the perception information collected by the roadside perception unit and the historical information stored in the storage unit to obtain pre-processing information for further pre-warning.

[0050] Meanwhile, the pre-processing information can be further stored in the data processing unit for the next period of pre-warning extraction.

[0051] The working principle of a traffic safety pre-warning system based on V2X under ice and snow conditions includes:

[0052] Step S0: processing roadside information by a roadside intelligent device;

[0053] Further, step S0 includes:

[0054] Step S001: sensing roadside data by a roadside perception unit.

[0055] Step S002: sensing roadside data and historical storage data simultaneously entering a data processing unit for preliminary processing of data to obtain pre-processing data.

[0056] Step S003: determining whether the pre-processing data needs to be updated to the data storage unit, if it needs to be updated, obtaining new historical storage data.

[0057] Step S004: determining whether the pre-warning threshold is reached according to the pre-warning parameters in the pre-processing data obtained in step S002. If the threshold is not reached, a new roadside processing cycle is started, and roadside data is sensed again; if the threshold is reached, step S005 is performed.

[0058] Step S005: knowing that the pre-warning parameters reach the pre-warning threshold, the various pre-warning parameters need to be calibrated to determine the pre-warning level.

[0059] The structure block diagram for calibrating various pre-warning parameters is shown in Figure 3 The roadside perception unit includes a road surface state sensor, a high-definition monitoring camera, an integrated weather station, and other related devices.

[0060] The road surface state sensor is used to determine the dry, wet, wet, rain, snow, frost, ice, and ice water mixed states of the road surface, and to determine the corresponding state thickness and coverage state of the road surface, and to quantitatively calculate and calibrate the road surface friction coefficient and other parameters.

[0061] High-definition monitoring camera is used for road surface condition video information, according to pre-trained algorithm, the road surface snow condition information is judged, such as complete coverage, partial coverage, dry, and the quantitative calculation calibration ice and snow distribution coefficient.

[0062] Integrated weather station is used for detecting temperature, humidity, atmospheric pressure, dew point, wind speed and direction, solar radiation road information, and road weather information can be used for assisting in judging road condition information, and can be used for correcting road surface state information. In particular, it can be used for correcting ice and snow distribution coefficient and road surface friction coefficient.

[0063] After calibrating the road surface friction coefficient, the ice and snow distribution coefficient and other parameters, the pre-alarm level is determined according to the pre-input algorithm, and then different pre-alarm modes are provided according to different pre-alarm levels.

[0064] As shown in Figure 4 When it is determined that the pre-alarm level is I, the pre-alarm mode is a combination of variable information board pre-alarm and digital media pre-alarm; when it is determined that the pre-alarm level is II or III, the pre-alarm mode is a combination of variable information board pre-alarm, vehicle-mounted intelligent pre-alarm and digital media pre-alarm; when it is determined that the pre-alarm level is IV or V, the pre-alarm mode is a combination of variable information board pre-alarm, vehicle-mounted intelligent pre-alarm, roadside broadcast pre-alarm and digital media pre-alarm.

[0065] When it is determined that the pre-alarm level is I, the pre-alarm mode is a combination of variable information board pre-alarm and digital media pre-alarm; when the pre-alarm level is II or III, vehicle-mounted intelligent pre-alarm is added; when the pre-alarm level is IV or V, roadside broadcast pre-alarm is added.

[0066] The embodiment of the present application also provides a traffic safety pre-alarm method based on V2X under ice and snow conditions, which is executed by using a traffic safety pre-alarm system based on V2X under ice and snow conditions.

[0067] As shown in Figure 5 A traffic safety pre-alarm method based on V2X under ice and snow conditions, comprising:

[0068] Step S1: sensing various types of roadside information based on roadside intelligent equipment;

[0069] Step S2: storing and processing the roadside information sensed by the roadside;

[0070] Step S3: judging whether the preprocessed data reaches the pre-alarm threshold value, if the threshold value is reached, the next step S4 is performed, if the threshold value is not reached, a new round of roadside sensing is performed;

[0071] Step S4: further processing the preprocessed data to obtain pre-alarm grading information, and dividing the pre-alarm level into five levels of I, II, III, IV and V;

[0072] Step S5: According to the warning level, the digital media warning, the vehicle-mounted intelligent warning, and the roadside intelligent warning are classified into the warning forms, and the specific forms are shown in Figure 3 The roadside intelligent warning includes the variable information board warning and the roadside broadcast warning.

[0073] Step S6: The vehicle is warned by the variable information board.

[0074] Step S7: The vehicle is warned by the V2X intelligent vehicle-mounted device.

[0075] Step S8: The vehicle is warned by the roadside broadcast device.

[0076] Step S9: The vehicle is warned by the modern digital media.

[0077] Further, the warning of the vehicle by the variable information board in step S6 includes:

[0078] Step S601: The preprocessed data is further processed to obtain warning classification information, and the warning level is classified into five levels of I, II, III, IV, and V.

[0079] Step S602: It is judged whether the traffic safety warning level is I-V level, if yes, step S603 is performed; if not, the process is restarted.

[0080] Step S603: The warning information is generated by the roadside warning information generation unit, and the form of the warning information is the text information that can be displayed by the roadside variable information board.

[0081] Step S604: The warning information is sent to the roadside information publishing and display unit through wired transmission.

[0082] Step S605: The warning information is published and displayed to the passing vehicle by the information publishing and display unit.

[0083] Further, the warning of the vehicle by the V2X intelligent vehicle-mounted device in step S7 includes:

[0084] Step S701: The preprocessed data is further processed to obtain warning classification information, and the warning level is classified into five levels of I, II, III, IV, and V.

[0085] Step S702: It is judged whether the traffic safety warning level is II-V level, if yes, step S703 is performed; if not, the process is restarted.

[0086] Step S703: The roadside information preliminarily processed by the roadside intelligent device is converted into standard V2X information by the roadside intelligent device interaction unit in the V2X intelligent device.

[0087] Step S704: Real-time acquisition of the location of the vehicle based on the vehicle positioning unit in the vehicle intelligent device, and distribution of the V2X information to the vehicle equipped with the vehicle intelligent device within the preset range through the vehicle-to-vehicle intelligent device interaction unit in the V2X intelligent device;

[0088] Further, the road-to-vehicle communication unit in the V2X intelligent device realizes the process from the roadside to the vehicle for the short-range wireless communication of V2X.

[0089] Step S705: The vehicle equipped with the device vehicle accepts the V2X information distributed from the roadside intelligent device through the vehicle-to-V2X intelligent device interaction unit, and converts the V2X information into vehicle recognizable information;

[0090] Step S706: Generate a warning information through the vehicle information processing unit, and the warning information includes one or a combination of several of visual, auditory, and tactile information;

[0091] Step S707: Transmit the warning information to the driver of the vehicle equipped with the vehicle intelligent device through the vehicle information publishing and display unit;

[0092] Further, step S8: Warning the vehicle through the roadside broadcasting device, including:

[0093] Step S801: Further process the preprocessed data to obtain warning classification information, and divide the warning level into five levels: I, II, III, IV, and V;

[0094] Step S802: Determine whether the traffic safety warning level is IV-V level, if it is IV-V level, proceed to step S803; if not, start over;

[0095] Step S803: Generate a warning information through the roadside warning information generation unit, and the warning information is in the form of voice information that can be displayed by the roadside broadcast;

[0096] Step S804: Transmit the warning information to the roadside information publishing and display unit through wired transmission;

[0097] Step S805: Publish and display the warning information to the passing vehicle by the information publishing and display unit.

[0098] Further, step S9: Warning the vehicle through modern digital media, including:

[0099] Step S901: Further process the preprocessed data to obtain warning classification information, and divide the warning level into five levels: I, II, III, IV, and V;

[0100] Step S902: Determine whether the traffic safety warning level is I-V level, if it is I-V level, then proceed to step S903; if not, start over;

[0101] Modern digital media warning is full grade warning, after determining the warning level, step S903 can be directly performed.

[0102] Step S903: Upload the warning information to the cloud through the cloud interaction unit.

[0103] Step S904: Traffic management personnel receive warning information and edit warning materials suitable for various types of modern digital media according to the warning level.

[0104] Step S905: Use modern digital media to release warning information to drivers and the public.

[0105] Now digital media includes but is not limited to social media platforms, online video platforms, self-media platforms, mobile application platforms, and live broadcast platforms.

[0106] Figure 10 As shown, Figure 10 The schematic flow chart of the warning method for different types of vehicles entering the preset range is shown in the following steps S10:

[0107] Step S1001: Determine the vehicle position has entered the preset electronic fence through the combination of the vehicle positioning unit and the roadside sensing unit.

[0108] Step S1002: Determine whether the vehicle is equipped with a vehicle-mounted intelligent device, if the vehicle is equipped with a vehicle-mounted intelligent device, proceed to step S1003; if not, only accept roadside variable information board warning, roadside broadcast warning, and modern media warning.

[0109] Step S1003: The vehicle interacts with the roadside intelligent device, the interaction method is shown in steps S704 and S705;

[0110] Step S1004: The vehicle equipped with a vehicle-mounted intelligent device simultaneously receives vehicle-mounted warning information, roadside variable information board warning, roadside broadcast warning, and modern media warning.

[0111] In the ice and snow covered environment, special protective devices are taken to prevent the snow removal vehicle from damaging the roadside intelligent device when throwing snow.

[0112] The roadside intelligent device should ensure its normal operation ability under ice and snow weather conditions, especially considering that the ice and snow conditions visual module frequently appears water vapor, icing, frosting and other conditions, appropriate devices or additional functions are taken to ensure the normal operation of the roadside sensing device and the visual module of the visual display device.

[0113] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, but as long as it does not depart from the technical solution of the present application, and is within the spirit and principle of the present application, any simple modification, equivalent replacement and improvement of the above embodiments are still within the protection scope of the present application.

Claims

1. A V2X-based traffic safety warning method in icy and snowy conditions, characterized in that, The system to which the traffic safety warning method is applied comprises: a roadside intelligent device, a V2X intelligent device, and a vehicle-mounted intelligent device; the roadside intelligent device comprises a roadside sensing unit, an information processing unit, a data storage unit, a warning information generation unit, an information publishing and display unit, a V2X intelligent device interaction unit, and a cloud interaction unit; the roadside sensing unit in the roadside intelligent device comprises a road surface state sensor, a high-definition monitoring camera, and an integrated weather station roadside sensing device; the cloud interaction unit in the roadside intelligent device is connected to the traffic management department through an optical fiber, and is used to transmit the processed information from the information publishing and display unit to the traffic management department; the high-definition monitoring camera is used for road surface condition video information, and determines the road surface snow condition information according to a pre-trained algorithm, and quantitatively calculates and calibrates the ice and snow distribution coefficient; the information publishing and display unit comprises a roadside variable information board and a roadside broadcast device; the V2X intelligent device comprises a roadside intelligent device interaction unit, a roadside communication unit, and a vehicle-mounted intelligent device interaction unit; the roadside intelligent device and the V2X intelligent device are connected through the V2X intelligent device interaction unit and the roadside intelligent device interaction unit to establish a V2X short-range direct communication wireless connection, and perform internal data transmission; the V2X intelligent device and the vehicle-mounted intelligent device are connected through the vehicle-mounted intelligent device interaction unit and the vehicle-mounted V2X intelligent device interaction unit to establish a V2X short-range direct communication wireless connection, and perform internal data transmission; the vehicle-mounted intelligent device comprises a vehicle-mounted V2X intelligent device interaction unit, a vehicle-mounted positioning unit, a vehicle-mounted information processing unit, and a vehicle-mounted information publishing and display unit; the vehicle-mounted positioning unit in the vehicle-mounted intelligent device comprises a Beidou satellite navigation system and a GPS global positioning system; the vehicle-mounted information publishing and display unit comprises a warning information prompting system; the V2X-based traffic safety warning method in icy and snowy conditions comprises: Step 1: Real-time acquisition of roadside information based on the roadside intelligent device; Step 2: The information processing unit receives the roadside information and judges the roadside information, selects a corresponding warning model to preliminarily process the roadside information, and stores the preliminarily processed roadside information to the data storage unit; Step 3: The warning information generation unit calibrates the road friction coefficient, the ice and snow distribution coefficient, and the correction coefficient according to the preliminarily processed roadside information, and determines the traffic warning level under the current ice and snow conditions; Step 4: The information publishing and display unit warns the entering vehicle based on the traffic warning level under the current ice and snow conditions; the warning step for the entering vehicle in Step 4 comprises: warning the vehicle loaded with the vehicle-mounted intelligent device based on the V2X intelligent vehicle-mounted device, the roadside variable information board, the roadside broadcast device, and modern digital media. The step of early warning based on the V2X intelligent vehicle equipment includes: converting the preliminary processed roadside information of the roadside intelligent equipment into standard V2X information through the roadside intelligent equipment interaction unit in the V2X intelligent equipment, obtaining the location of the vehicle in real time based on the vehicle positioning unit in the vehicle intelligent equipment, and distributing the standard V2X information to vehicles within a preset range; the vehicle processes the standard V2X information through the vehicle information processing unit in the vehicle intelligent equipment, and then performs real-time early warning through the vehicle information publishing and display unit; The step of early warning based on the roadside variable information board includes: converting the preliminary processed roadside information into visual information based on the early warning information generation unit in the roadside intelligent equipment, and displaying the visual information through the roadside variable information board to perform real-time early warning on passing vehicles; The step of early warning based on the roadside broadcast equipment includes: converting the preliminary processed roadside information into auditory information based on the early warning information generation unit in the roadside intelligent equipment, and broadcasting the auditory information through the roadside broadcast equipment to perform real-time early warning on passing vehicles; The step of early warning based on the modern digital media includes: sending the preliminary processed roadside information and the traffic warning level to the traffic management department based on the cloud interaction unit in the roadside intelligent equipment, and the traffic management department uses frequency modulation broadcast and WeChat public number to warn vehicles on the road section; The roadside variable information board, the roadside broadcast equipment and the modern digital media are used to warn vehicles without vehicle intelligent equipment; When the warning level is determined to be I level, the warning mode is a combination of variable information board warning and digital media warning; when the warning level is determined to be II or III level, the warning mode is a combination of variable information board warning, vehicle intelligent warning and digital media warning; when the warning level is determined to be IV or V level, the warning mode is a combination of variable information board warning, vehicle intelligent warning, roadside broadcast warning and digital media warning.

2. The V2X-based traffic safety warning method in icy and snowy conditions according to claim 1, characterized in that, The roadside information in step 1 includes current road weather information, road surface state information, road surface ice and snow distribution information, off-road state information and traffic flow information.

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