CN105405321B - Safe early warning method and system in vehicle on expressway traveling - Google Patents

Abstract

The present invention proposes safe early warning method and system in a kind of vehicle on expressway traveling, wherein, this method includes:The road speed of this car and the road speed of rear car are detected by the radar velocity measurement device above track, wherein, sheet, rear car are in same track；Vehicle spacing between machine testing sheet, rear car is imaged by HD video above track, and the image information for obtaining by HD video video camera rear car determines the license board information of rear car；Determine safety vehicle spacing threshold originally, between rear car；Judge whether vehicle spacing is less than safety vehicle spacing threshold；If vehicle is smaller than safety vehicle spacing threshold, the license board information of the first warning information and rear car is shown using the variable message board being installed on road.This method in real time can detect the following distance of vehicle and judge whether near while carry out hypotelorism early warning to the driver with car, reduce traffic accident incidence, improve traffic safety level.

Description

Method and system for safety early warning during vehicle driving on expressway

technical field

The invention relates to the technical field of intelligent transportation, in particular to a safety warning method and system for vehicles running on expressways.

Background technique

With the continuous increase of expressway mileage, the traffic safety situation of expressways is also relatively severe. In recent years, traffic accidents on expressways have accounted for a large proportion of all road traffic accidents and are showing an upward trend. At the same time, due to the high speed of vehicles on expressways, the severity of injuries in traffic accidents is often relatively large. According to the analysis of the causes of expressway traffic accidents, most of them are traffic accidents in which the following car is too close to stop and the rear car cannot stop safely when the front car brakes. Due to the restrictions, there are no good technical management methods to deal with the dangerous situation of following the car too close. At the same time, the growing expressway system has put forward new requirements for expressway traffic management. It is necessary to change from the past emergency management to the active management before the event, and strengthen the early warning management in the expressway management process to reduce traffic accidents. Potential hidden dangers of highway traffic accidents. Relevant research focuses on how to install equipment to detect the following distance on vehicles to provide early warning through on-board equipment. However, due to maturity, cost and other issues, this type of technology is difficult to promote in the short term, and it cannot be used on highways. traffic management work.

Therefore, too close following distance is a typical hidden danger of highway traffic accidents, which needs to be detected and given warning to corresponding drivers, which has also become an important issue in the process of highway management.

Contents of the invention

The object of the present invention is to solve one of the technical problems in the above-mentioned technologies at least to a certain extent.

For this reason, the first object of the present invention is to propose a safety early warning method in the driving of a vehicle on the expressway, the method can detect the following distance of the vehicle in real time and judge whether it is too close, and at the same time monitor the following driver Carry out early warning of too short distance to reduce the incidence of traffic accidents and improve the level of traffic safety.

The second object of the present invention is to propose a safety warning system for vehicles running on expressways.

In order to achieve the above-mentioned purpose, the embodiment of the first aspect of the present invention proposes a safety early warning method during vehicle driving on the expressway, which includes the following steps: detecting the driving speed of the vehicle and the speed of the vehicle behind through the radar speed measuring device installed above the lane. Driving speed, wherein the vehicle and the rear vehicle are in the same lane; the vehicle distance between the vehicle and the rear vehicle is detected by a high-definition video camera installed above the lane, and the distance between the vehicle and the rear vehicle is detected by the high-definition video camera The video camera acquires the image information of the rear vehicle, and determines the license plate information of the rear vehicle according to the image information of the rear vehicle; determines the safe vehicle distance threshold between the vehicle and the rear vehicle; judges the vehicle Whether the distance between vehicles is less than the safe vehicle distance threshold; if the vehicle distance is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car.

In the safety early warning method for driving vehicles on the expressway in the embodiment of the present invention, the image information of the rear car is obtained through a high-definition video camera, the license plate information and the detected vehicle distance between the vehicle and the rear vehicle are determined, and whether the vehicle distance is smaller than the safety vehicle is judged. When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

In an embodiment of the present invention, the determining the safe vehicle distance threshold between the vehicle and the following vehicle includes: acquiring the image information of the vehicle through the high-definition video camera; The image information of the vehicle determines the license plate information and vehicle model information of the vehicle, and determines the vehicle model information of the vehicle behind according to the graphic information of the vehicle behind; obtains the current road condition information, and determines The vehicle model information of the following vehicle, the current road condition information, the driving speed of the own vehicle, and the driving speed of the following vehicle calculate a safe inter-vehicle distance threshold between the own vehicle and the following vehicle.

In one embodiment of the present invention, the safety warning method for vehicles traveling on expressways further includes: when it is judged that the distance between vehicles is less than the safe vehicle distance threshold, changing the driving speed of the vehicle behind to , image information, license plate information and the vehicle type information are stored in the too-short-vehicle-distance database.

In one embodiment of the present invention, after saving the driving speed, image information, license plate information and the vehicle type information of the following vehicle in the too-close distance database, it further includes: obtaining the detected The total number of vehicles obtained; from the too-short distance database, the number of vehicles with too close distances counted within the preset time period; determined according to the total number of vehicles and the number of vehicles with too close distances The proportion of vehicles with too close following distance; judging whether the proportion of vehicles with too close following distance exceeds the preset threshold; if the proportion of vehicles with too close following distance exceeds the preset threshold, use the The variable information panel of the vehicle displays a second warning message to remind all drivers to pay attention to the distance between vehicles.

In one embodiment of the present invention, the detection of the vehicle distance between the vehicle and the rear vehicle through the high-definition video camera installed above the lane includes: detection through the built-in virtual coil in the high-definition video camera The vehicle distance between the host vehicle and the rear vehicle.

In order to achieve the above-mentioned purpose, the embodiment of the second aspect of the present invention proposes a safety early warning system for vehicles running on the expressway, including: a detection module, which detects the driving speed of the vehicle and the speed of the vehicle behind through the radar speed measuring device installed above the lane. The driving speed, wherein, the vehicle and the rear vehicle are in the same lane; the first acquisition module detects the vehicle distance between the vehicle and the rear vehicle through a high-definition video camera installed above the lane , and obtain the image information of the rear car through the high-definition video camera, and determine the license plate information of the rear car according to the image information of the rear car; the first determination module determines the relationship between the vehicle and the rear car The threshold of the safe distance between vehicles; the first judging module, judging whether the distance between vehicles is less than the threshold of safe distance between vehicles; the first warning module, if the distance between vehicles is less than the threshold of safe distance between vehicles, then use the The variable information board displays the first warning information and the license plate information of the following vehicle.

The safety early warning system for vehicles running on the expressway in the embodiment of the present invention obtains the image information of the rear car through a high-definition video camera and determines the license plate information and the detected vehicle distance between the vehicle and the vehicle behind, and judges whether the vehicle distance is smaller than the safe vehicle When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

In one embodiment of the present invention, the determination module includes: an acquisition unit, configured to acquire the image information of the vehicle through the high-definition video camera; a determination unit, configured to determine the image information of the vehicle according to the image information of the vehicle The license plate information and model information of the own car, and determine the model information of the rear car according to the graphic information of the rear car; the calculation unit obtains the current road condition information, and determines The vehicle model information, the current road condition information, the driving speed of the own vehicle, and the driving speed of the following vehicle are used to calculate a safe inter-vehicle distance threshold between the own vehicle and the following vehicle.

In one embodiment of the present invention, the safety warning system for vehicles running on expressways further includes: a saving module, when it is judged that the distance between vehicles is less than the safe vehicle distance threshold, The driving speed, image information, license plate information and the vehicle type information are stored in the too-short-vehicle-distance database.

In one embodiment of the present invention, after saving the driving speed, image information, license plate information and the vehicle model information of the following vehicle in the too-short vehicle distance database, it further includes: a second acquiring module, acquiring the preset The number of all vehicles detected within the set time; the third acquisition module obtains the number of vehicles that are too close to the vehicle distance counted within the preset time from the too-short vehicle distance database; the second determination module, according to the The total number of vehicles and the number of vehicles that are too close to the vehicle determine the proportion of vehicles that are too close to the vehicle; the second judgment module determines whether the proportion of vehicles that are too close to the vehicle exceeds a preset threshold; the second warning module , if the proportion of vehicles with too close following distance exceeds the preset threshold, a second warning message is displayed on a variable information board installed on the road to remind all drivers to pay attention to the distance between vehicles.

In an embodiment of the present invention, the detection module is specifically configured to: detect the vehicle distance between the own vehicle and the rear vehicle through a built-in virtual coil in the high-definition video camera.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is the flow chart of the safety early warning method in the vehicle driving on the expressway according to one embodiment of the present invention;

FIG. 2 is a flow chart of determining a safe vehicle distance threshold between a preceding vehicle and a following vehicle according to an embodiment of the present invention;

Fig. 3 is a flow chart of a safety warning method for vehicles traveling on expressways according to another embodiment of the present invention;

Fig. 4 is a flow chart of a safety warning method during vehicle driving on an expressway according to a specific embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a safety warning system for vehicles traveling on a highway according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a safety warning system for vehicles traveling on expressways according to another embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a safety warning system for vehicles traveling on expressways according to a specific embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a safety warning system for vehicles traveling on expressways according to another specific embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the invention includes alternative implementations in which functions may be performed out of the order shown or discussed, including substantially concurrently or in reverse order depending on the functions involved, which shall It is understood by those skilled in the art to which the embodiments of the present invention pertain.

A safety warning method and a safety warning system for driving vehicles on expressways according to embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a safety warning method for vehicles traveling on a highway according to an embodiment of the present invention.

As shown in Figure 1, the method includes:

S11. The radar speed measuring device installed above the lane detects the driving speed of the own vehicle and the driving speed of the following vehicle, wherein the own vehicle and the following vehicle are in the same lane.

S12. Detect the vehicle distance between the vehicle and the rear vehicle through the high-definition video camera installed above the lane, and obtain the image information of the rear vehicle through the high-definition video camera, and determine the license plate information of the rear vehicle according to the image information of the rear vehicle.

S13. Determine a safe inter-vehicle distance threshold between the own vehicle and the following vehicle.

Specifically, the specific process of determining the safe vehicle distance threshold between the own vehicle and the following vehicle, as shown in Figure 2, may include:

S131, acquiring image information of the vehicle through a high-definition video camera.

S132. Determine the license plate information and vehicle model information of the vehicle according to the image information of the vehicle, and determine the vehicle model information of the vehicle behind according to the graphic information of the vehicle behind.

S133. Obtain the current road condition information, and calculate a safe inter-vehicle distance threshold between the own vehicle and the following vehicle according to the vehicle model information, the vehicle model information of the following vehicle, the current road condition information, the driving speed of the own vehicle, and the driving speed of the following vehicle.

S14, judging whether the distance between vehicles is smaller than a safe distance between vehicles threshold.

S15. If the vehicle distance is less than the safe vehicle distance threshold, use the variable information board installed on the road to display the first warning information and the license plate information of the following vehicle.

Among them, the variable information board, the variable information board can display text, graphics, numbers and other contents.

For example, if the safe vehicle distance threshold between the front and rear vehicles is determined to be 50 meters, when the distance between the rear vehicle and the front vehicle is monitored to be less than 50 meters, the variable information board installed on the road can display the license plate information of the rear vehicle, And display the warning message "For driving safety, please pay attention to driving safety". In the safety early warning method for driving vehicles on the expressway in the embodiment of the present invention, the image information of the rear car is obtained by a high-definition video camera to determine the license plate information and the detected vehicle distance between the vehicle and the vehicle behind, and to determine whether the vehicle distance is less than the safe vehicle distance Threshold, when the vehicle distance is less than the safe vehicle distance threshold, use the variable information board installed on the road to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too close , At the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and strengthens traffic safety.

In the safety early warning method for driving vehicles on the expressway in the embodiment of the present invention, the image information of the rear car is obtained through a high-definition video camera, the license plate information and the detected vehicle distance between the vehicle and the rear vehicle are determined, and whether the vehicle distance is smaller than the safety vehicle is judged. When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

Fig. 3 is a flow chart of a safety warning method for vehicles traveling on expressways according to another embodiment of the present invention.

As shown in Figure 3, the method includes:

S301. The radar speed measuring device installed above the lane detects the driving speed of the own vehicle and the driving speed of the following vehicle, wherein the own vehicle and the following vehicle are in the same lane.

S302. Detect the vehicle distance between the vehicle and the rear vehicle through the high-definition video camera installed above the lane, obtain the image information of the rear vehicle through the high-definition video camera, and determine the license plate information of the rear vehicle according to the image information of the rear vehicle.

S303. Determine a safe inter-vehicle distance threshold between the own vehicle and the following vehicle.

In one embodiment of the present invention, the image information of the vehicle can be acquired through a high-definition video camera, and the license plate information and vehicle model information of the vehicle can be determined according to the image information of the vehicle, and the vehicle model of the vehicle behind can be determined according to the graphic information of the vehicle behind information, and obtain current road condition information, and calculate the safe inter-vehicle distance between the vehicle and the following vehicle based on the model information of the vehicle, the vehicle model information of the vehicle behind, the current road condition information, the driving speed of the vehicle, and the driving speed of the vehicle behind threshold.

S304, judging whether the vehicle distance is smaller than a safe vehicle distance threshold.

S305. If the vehicle distance is less than the safe vehicle distance threshold, use the variable information board installed on the road to display the first warning information and the license plate information of the following vehicle.

S306. When it is determined that the vehicle distance is less than the safe vehicle distance threshold, save the driving speed, image information, license plate information and vehicle model information of the following vehicle in the vehicle distance too close database.

S307. Obtain the total number of vehicles detected within a preset time.

S308. Obtain the number of vehicles with too close distances counted within a preset time from the too close distances database.

S309. Determine the proportion of vehicles whose following distance is too close according to the total number of vehicles and the number of vehicles whose distance is too close.

S310, judging whether the proportion of vehicles following the vehicle too closely exceeds a preset threshold.

S311. If the proportion of vehicles with too close following distance exceeds a preset threshold, display a second warning message on a variable information board installed on the road, so as to remind all drivers to pay attention to the distance between vehicles.

In order to facilitate the understanding of the embodiments of the present invention, the method for safety early warning during vehicle driving on the expressway will be described below by way of example.

For example, for a certain vehicle A passing through the detection section, the radar speed measuring device will first detect the real-time driving speed v _A of the vehicle, and at the same time, the high-definition video camera will detect the distance LAB between the vehicle and the following vehicle _B in the same lane , and then when the following vehicle B arrives at the detection section, the radar speed measurement will detect the speed v _B of the following vehicle B, and at the same time, the high-definition video camera will capture photos of the vehicle and perform license plate recognition. Then, according to the relative relationship between v _A , v _B and _LAB and the following distance threshold in a specific situation, it will be compared to determine whether the current rear vehicle B follows the front vehicle too closely; if the rear vehicle B does not follow the front vehicle A too closely , the system will not perform any warning. If the rear car B follows the front car A too close, the license plate of the rear car B recognized by the high-definition video camera detector will be transmitted to the downstream variable information board, and the variable information board will display the corresponding license plate information and "Attention to keep the car "Distance" and other words to give early warning to the vehicle. At the same time, the system stores the relevant information of the car into the database, including the license plate information, passing time information, passing point number, expressway name, information on following the car too closely, etc.; The number of vehicles that are too close to the vehicle, and compared with the number of all vehicles passing through the lane of the section, if the proportion of vehicles that are too close to the vehicle exceeds the set threshold, the variable information board will not display the license plate Early warning of too close to the car to remind the driver of the vehicle passing through the section to pay attention to the problem of too close to the car and keep the distance between the cars.

In the safety early warning method for vehicles running on expressways in the embodiment of the present invention, by counting whether the proportion of vehicles with too close following distance exceeds the preset threshold within a preset time period, if the proportion of vehicles with too close following distance exceeds the preset threshold The threshold uses the variable information board installed on the road to display the second early warning information to remind all drivers to pay attention to the distance between vehicles. This method can detect the following distance of the vehicle in real time and judge whether it is too close. Carry out early warning of too short distance, reduce the incidence of traffic accidents, and improve the level of traffic safety.

Fig. 4 is a flowchart of a safety warning method for vehicles traveling on expressways according to a specific embodiment of the present invention.

Among them, the radar detects the vehicle and measures the speed 41. The radar installed above the lane is used to detect the speed of each vehicle passing through each lane to obtain the speed value of each vehicle. The high-definition camera performs video recording and picture capture 42. The high-definition video camera above the lane continuously records the passing vehicles in each lane and captures the pictures of the front of each vehicle for license plate and vehicle model recognition43. Using the captured pictures, image recognition software is used to identify the captured vehicles Carry out identification of the license plate and vehicle type at the same time, obtain the license plate and model of the passing vehicle, and perform inter-vehicle distance detection44, use a high-definition camera and apply image analysis software to measure the inter-vehicle distance between two consecutive vehicles on the same lane Detect, calculate the vehicle distance threshold 45, calculate the safe vehicle distance of every two front and rear adjacent vehicles according to the road conditions, the models of the front and rear vehicles, etc., obtain the corresponding safe vehicle distance threshold, issue the early warning information 46, and send the detected The vehicle distance is compared with the calculated safe vehicle distance threshold. If the detected vehicle distance is less than the safe vehicle distance threshold, the variable information board installed on the road will be used to display the license plate and early warning information of the vehicle following too close; if detected If the detected vehicle distance is greater than the safe vehicle distance threshold, no warning will be given to the vehicle. Information storage 47, if the detected vehicle distance is less than the safe vehicle distance threshold, then the speed value of the rear car, the captured image, and the recognized license plate number will be included in the The vehicle distance is too close to the database; the following distance is too close to the statistical analysis 48, based on the data of all detected vehicles and the vehicle data that is too close to the vehicle; If the proportion of vehicles with too close vehicle distance exceeds a certain ratio, the variable information board installed on the road will be used to warn of the situation that the following vehicle distance is too close to occur in this section of the road in the near future.

More specifically, for example, for a section of a certain expressway, various types of equipment involved in the present invention are installed. At 12:00 on January 1, 2015, vehicle A passes through the detection section, and the speed radar will detect the speed v _A of vehicle A, which is 100 km/h. And carry out the license plate and model identification of vehicle A, the license plate is Beijing Z12345, and the model is a car. At the same time, the video detection software will detect the distance LAB between the vehicle A and the following vehicle _B in the same lane based on the high-definition video camera, which is 100 meters, and store this information in the database. Afterwards, when the following vehicle B arrives at the detection section, the speed measuring radar will detect the speed v _B of the following vehicle B, which is 110 km/h. At the same time, the high-definition video camera will capture photos of the vehicle and perform license plate and model recognition while recording , the license plate is Beijing X54321, and the model is a car. The calculation software in the industrial computer will calculate the safe vehicle distance threshold between vehicles A and B according to the models of vehicles A and B, the current road conditions, and the data of v _A and v _B. For example, the calculation threshold is 150 meters, and then the The detected distance between vehicles L _AB (100 meters) is compared with the safe distance between vehicles (150 meters) in this situation. The result is that the following distance of the following vehicle is less than the safe distance between vehicles under the current situation. Threshold, in this case , the downstream variable information board will display a warning message: Beijing X4321, please pay attention to the following distance. At the same time, the relevant information of vehicle B is stored in the data, including the license plate, model, passing time, following distance and other information. Carry out a calculation every minute, and calculate the proportion of the vehicles that are too close to the vehicle in the past 5 minutes to the total number of passing vehicles in the 5 minutes. If the proportion (such as 30%) exceeds the system preset ratio (such as 20%) ), then warning messages such as "Please pay attention to keeping the distance between vehicles" will be displayed on the downstream variable information board.

In the safety early warning method for driving vehicles on the expressway in the embodiment of the present invention, the image information of the rear car is obtained through a high-definition video camera, the license plate information and the detected vehicle distance between the vehicle and the rear vehicle are determined, and whether the vehicle distance is smaller than the safety vehicle is judged. When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

Fig. 5 is a schematic structural diagram of a safety warning system for vehicles traveling on an expressway according to an embodiment of the present invention.

The system includes: a detection module 501 , a first acquisition module 502 , a first determination module 503 , a first judgment module 504 and a first warning module 505 .

Among them, the detection module 501 detects the driving speed of the own vehicle and the driving speed of the following vehicle through the radar speed measuring device installed above the lane, wherein, the own vehicle and the following vehicle are in the same lane, and the first acquisition module 502 is installed above the lane. The high-definition video camera detects the vehicle distance between the car and the rear car, and obtains the image information of the rear car through the high-definition video camera, determines the license plate information of the rear car according to the image information of the rear car, and the first determining module 503 determines the distance between the car and the rear car. The safe vehicle distance threshold between the following vehicles, the first judging module 504 judges whether the vehicle distance is less than the safe vehicle distance threshold, and the first warning module 505 uses the variable information board installed on the road if the vehicle distance is less than the safe vehicle distance threshold Display the first warning information and the license plate information of the vehicle behind.

Specifically, the first determination module 503 includes: the acquisition unit 5031 is used to acquire the image information of the vehicle through a high-definition video camera, and the determination unit 5032 is used to determine the license plate information and model information of the vehicle according to the image information of the vehicle, and according to The graphic information of the following vehicle determines the vehicle type information of the following vehicle, and the calculation unit 5033 obtains the current road condition information, and calculates the following vehicle type information based on the vehicle type information, the vehicle type information of the following vehicle, the current road condition information, the driving speed of the vehicle, and the driving speed of the following vehicle. The safe inter-vehicle distance threshold between the own vehicle and the following vehicle.

It should be noted that the aforementioned explanations for the embodiment of the safety warning method for vehicles on the expressway are also applicable to the safety warning system for vehicles on the expressway in this embodiment. repeat.

The safety early warning system for vehicles running on the expressway in the embodiment of the present invention obtains the image information of the rear car through a high-definition video camera and determines the license plate information and the detected vehicle distance between the vehicle and the vehicle behind, and judges whether the vehicle distance is smaller than the safe vehicle When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

Fig. 6 is a schematic structural diagram of a safety warning system for vehicles traveling on expressways according to another embodiment of the present invention.

The system includes: a detection module 501, a first acquisition module 502, a first determination module 503, a first judgment module 504, a first warning module 505, a storage module 506, a second acquisition module 507, a third acquisition module 508, a second A determination module 509 , a second judgment module 5010 and a second warning module 5011 .

Among them, the detection module 501 detects the driving speed of the own vehicle and the driving speed of the following vehicle through the radar speed measuring device installed above the lane, wherein, the own vehicle and the following vehicle are in the same lane, and the first acquisition module 502 is installed above the lane. The high-definition video camera detects the vehicle distance between the car and the rear car, and obtains the image information of the rear car through the high-definition video camera, determines the license plate information of the rear car according to the image information of the rear car, and the first determining module 503 determines the distance between the car and the rear car. The safe vehicle distance threshold between the following vehicles, the first judging module 504 judges whether the vehicle distance is less than the safe vehicle distance threshold, and the first warning module 505 uses the variable information board installed on the road if the vehicle distance is less than the safe vehicle distance threshold Displaying the first warning information and the license plate information of the rear car, the saving module 506 saves the driving speed, image information, license plate information and vehicle model information of the rear car to the too close database when it is judged that the distance between vehicles is less than the safe vehicle distance threshold, The second acquisition module 507 acquires the total number of vehicles detected within the preset time, the third acquisition module 508 acquires the number of vehicles that are too close to the vehicle distance counted within the preset time from the too-short distance database, and the second determination module 509 Determine the proportion of vehicles that are too close to the vehicle according to the total number of vehicles and the number of vehicles that are too close to each other. The second judging module 5010 determines whether the proportion of vehicles that are too close to the vehicle exceeds a preset threshold. If the second warning module 5011 follows If the proportion of vehicles whose distance is too close exceeds the preset threshold, the variable information board installed on the road is used to display the second warning message to remind all drivers to pay attention to the distance between vehicles.

It should be noted that the aforementioned explanations for the embodiment of the safety warning method for vehicles on the expressway are also applicable to the safety warning system for vehicles on the expressway in this embodiment. repeat.

The safety early warning system for vehicles running on the expressway in the embodiment of the present invention obtains the image information of the rear car through a high-definition video camera and determines the license plate information and the detected vehicle distance between the vehicle and the vehicle behind, and judges whether the vehicle distance is smaller than the safe vehicle When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

Fig. 7 is a schematic structural diagram of a safety warning system for vehicles traveling on expressways according to a specific embodiment of the present invention.

The system mainly includes equipment: radar speed measuring equipment, high-definition video camera, identification software, central server, communication device, and variable information board.

Radar speed measuring equipment is installed above the lanes, and a radar speed measuring device is installed above each lane to detect the speed of vehicles passing in each lane, and at the same time transmit the measured speed data and time data to the central server; high-definition video cameras, generally according to the detection Install different numbers of high-definition video cameras to achieve full coverage of each lane of the expressway. For example, for a one-way three-lane expressway, a 5-megapixel camera is usually installed to cover three lanes, and for a one-way four-lane highway. For highways, two 5-megapixel cameras are installed. On the one hand, the camera performs real-time video recording, on the other hand, it performs image capture and license plate recognition for each passing vehicle, and also needs to recognize the distance between each adjacent two vehicles; the recognition software receives the passing vehicle captured by the camera After the picture, the recognition software recognizes the vehicle picture, mainly including license plate number recognition, vehicle type judgment, vehicle distance recognition, etc., and then transmits the recognized data to the central data server; the central server is mainly responsible for all kinds of detected The data is processed and stored, including real-time video data, license plate recognition data, vehicle distance data, vehicle speed data, etc., and can automatically generate information published on the variable information board according to the detection data results; the communication device is mainly used to complete the radar The communication between the speed measuring device, high-definition video camera, variable information board and the central server is to transmit all kinds of detected data information to the central server on the one hand, and to transmit the information to be released generated by the central server to the available change information board. The variable information board is installed downstream of the video detection section. When a small distance between vehicles is detected, it is used to give a targeted early warning to a certain vehicle, displaying the vehicle's license plate and related early warning information; When the distance is small and there are many situations, the early warning information will be displayed extensively to give early warning to passing vehicles.

The safety early warning system for vehicles running on the expressway in the embodiment of the present invention obtains the image information of the rear car through a high-definition video camera and determines the license plate information and the detected vehicle distance between the vehicle and the vehicle behind, and judges whether the vehicle distance is smaller than the safe vehicle When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

Fig. 8 is a schematic structural diagram of a safety warning system for vehicles traveling on expressways according to another specific embodiment of the present invention.

The system includes a speed measurement unit 801, a vehicle driving video recording unit 802, a license plate recognition module 803, a vehicle following distance detection module 804, a vehicle following too close information storage module 805, a vehicle following distance statistical analysis module 806, and an early warning information release unit 807.

Among them, the speed measurement unit 801 refers to the use of the radar speed measurement device installed above the lane to detect the speed of all vehicles passing through the lane, and at the same time transmit the detected vehicle speed, detection time, etc. to the database of the central server for storage. The driving video recording unit 802 uses the high-definition camera set up above the lane to continuously record the driving behavior of the vehicle, and transmits the video to the central server for storage or saves it in the local storage device according to the communication bandwidth between the field device and the central server. The recognition module 803 uses the developed license plate recognition software module to recognize the license plate number and the color of the license plate, thereby judging the vehicle type while recognizing the license plate number, and transmitting the recognized license plate number, body color, vehicle type and other information to the central server , the following distance detection module 804 uses the built-in virtual coil of the high-definition camera to detect the following distance between the front and rear vehicles, obtains the following distance of the vehicle and transmits it to the central server, and the following vehicle too close information storage module 805 communicates with Comparing the threshold value of the following distance, the license plate information, picture information, and following distance of the vehicle that are too close to the following distance are stored in the following distance database, and the following distance statistical analysis module 806 is based on the following distance. Analyze the data and the total number of cross-section traffic volumes to calculate the proportion and change trend of vehicles with too close following distance. The early warning information release unit 807 uses the variable information board installed above the lane to issue early warning information for single vehicles or cross-section vehicles with too close following distance.

The safety early warning system for vehicles running on the expressway in the embodiment of the present invention obtains the image information of the rear car through a high-definition video camera and determines the license plate information and the detected vehicle distance between the vehicle and the vehicle behind, and judges whether the vehicle distance is smaller than the safe vehicle When the distance between vehicles is less than the safe vehicle distance threshold, the variable information board installed on the road is used to display the first warning information and the license plate information of the rear car. This method can detect the following distance of the vehicle in real time and judge whether it is too high. Nearly, at the same time, the driver who follows the car is given an early warning, which reduces the incidence of traffic accidents and improves the level of traffic safety.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a Integral; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (6)

1. A safety early warning method in vehicle running on an expressway, is characterized in that, comprises the following steps: Detecting the driving speed of the own vehicle and the driving speed of the following vehicle through a radar speed measuring device installed above the lane, wherein the own vehicle and the following vehicle are in the same lane; Detect the vehicle distance between the vehicle and the rear vehicle through the high-definition video camera installed above the lane, and obtain the image information of the rear vehicle through the high-definition video camera, and determine according to the image information of the rear vehicle The license plate information of the rear car; determining a safe vehicle-to-vehicle distance threshold between the host vehicle and the following vehicle; judging whether the vehicle distance is less than the safe vehicle distance threshold; If the distance between vehicles is less than the safe vehicle distance threshold, displaying the first warning information and the license plate information of the rear car by using a variable information board installed on the road; When it is determined that the vehicle distance is less than the safe vehicle distance threshold, the driving speed, image information, license plate information and vehicle model information of the rear vehicle are saved in the vehicle distance too close database; Obtain the number of all vehicles detected within the preset time; Obtaining the number of vehicles that are too close to each other within the preset time from the too-short-to-vehicle database; Determine the proportion of vehicles with too close following distance according to the total number of vehicles and the number of vehicles with too close distance between vehicles; judging whether the proportion of vehicles whose following distance is too close exceeds a preset threshold; If the proportion of vehicles with too close following distance exceeds the preset threshold, a second warning message is displayed on a variable information board installed on the road to remind all drivers to pay attention to the distance between vehicles. 2. The safety early-warning method in vehicle traveling on expressway as claimed in claim 1, is characterized in that, described determining the safe inter-vehicle distance threshold value between described own car and described rear car, comprises: Obtaining the image information of the vehicle through the high-definition video camera; determining the license plate information and vehicle model information of the vehicle according to the image information of the vehicle, and determining the vehicle model information of the vehicle behind according to the graphic information of the vehicle behind; Obtain current road condition information, and calculate the relationship between the vehicle and the vehicle according to the vehicle model information of the vehicle, the vehicle model information of the following vehicle, the current road condition information, the driving speed of the vehicle, and the driving speed of the following vehicle. The safe vehicle-to-vehicle distance threshold between the following vehicles. 3. as claimed in claim 1 or 2, the safety early warning method in vehicle running on the expressway, is characterized in that, described by being installed on the high-definition video camera above the roadway to detect the distance between the said own car and the said rear car. Vehicle spacing, including: The vehicle distance between the host vehicle and the rear vehicle is detected through the built-in virtual coil in the high-definition video camera. 4. A safety early warning system for vehicles traveling on an expressway, characterized in that it comprises: The detection module detects the driving speed of the own vehicle and the driving speed of the following vehicle through the radar speed measuring device installed above the lane, wherein the own vehicle and the following vehicle are in the same lane; The first acquisition module detects the vehicle distance between the vehicle and the rear vehicle through the high-definition video camera installed above the lane, and obtains the image information of the rear vehicle through the high-definition video camera, according to the rear vehicle The image information of the car determines the license plate information of the rear car; A first determination module, determining a safe vehicle distance threshold between the host vehicle and the rear vehicle; A first judging module, judging whether the vehicle distance is smaller than the safe vehicle distance threshold; The first warning module, if the distance between vehicles is less than the safe vehicle distance threshold, then use the variable information board installed on the road to display the first warning information and the license plate information of the rear car; The saving module saves the driving speed, image information, license plate information and vehicle model information of the rear vehicle in the too-short vehicle distance database when it is judged that the vehicle distance is less than the safe vehicle distance threshold; The second acquisition module acquires the total number of vehicles detected within a preset time; The third acquisition module is to obtain the number of vehicles with too close distances counted within the preset time from the too close distance between vehicles; The second determination module determines the proportion of vehicles with too close following distance according to the total number of vehicles and the number of vehicles with too close distance between vehicles; A second judging module, judging whether the proportion of vehicles whose following distance is too close exceeds a preset threshold; The second warning module, if the proportion of vehicles with too close following distance exceeds the preset threshold value, then use the variable information board installed on the road to display the second warning information to remind all drivers to pay attention to the distance between vehicles. 5. The safety early warning system in vehicle traveling on expressway as claimed in claim 4, is characterized in that, described first determination module comprises: an acquisition unit, configured to acquire the image information of the vehicle through the high-definition video camera; A determining unit, configured to determine the license plate information and vehicle model information of the vehicle according to the image information of the vehicle, and determine the vehicle model information of the vehicle behind according to the graphic information of the vehicle behind; a calculation unit, which acquires current road condition information, and calculates the The safe vehicle distance threshold between the own vehicle and the following vehicle. 6. The safety early warning system during vehicle driving on the expressway as claimed in claim 4 or 5, wherein the detection module is specifically used for: The vehicle distance between the host vehicle and the rear vehicle is detected through the built-in virtual coil in the high-definition video camera.