CN112216111A - Vehicle speed and distance early warning system and method based on microwave radar and video image - Google Patents
Vehicle speed and distance early warning system and method based on microwave radar and video image Download PDFInfo
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- CN112216111A CN112216111A CN202011110951.6A CN202011110951A CN112216111A CN 112216111 A CN112216111 A CN 112216111A CN 202011110951 A CN202011110951 A CN 202011110951A CN 112216111 A CN112216111 A CN 112216111A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B31/00—Predictive alarm systems characterised by extrapolation or other computation using updated historic data
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes
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Abstract
The invention discloses a vehicle speed and vehicle distance early warning system based on a microwave radar and a video image, wherein a portal frame is arranged on a road section marked with a vehicle distance confirmation line, the system further comprises the microwave radar and a camera which are arranged on the portal frame, and the system further comprises an early warning information output system, a controller and a memory; the microwave radar, the camera, the early warning information output system and the memory are respectively in communication connection with the controller. The invention also provides a vehicle speed and distance early warning method adopting the early warning system, which utilizes a microwave radar to obtain vehicle speed and position information and then is matched with a video image to judge whether early warning prompt is needed or not. The invention adopts the microwave radar and the camera to realize the acquisition of the vehicle information, and has high precision and reliability; the early warning system is convenient to arrange, the devices are few, the cost is low, and monitoring, evidence obtaining and early warning of dynamic driving speed and driving distance can be realized by combining a radar, a camera, an electronic display screen and three voice warning devices with a reference line.
Description
Technical Field
The invention relates to the technical field of traffic safety, in particular to a vehicle speed and distance early warning system and method based on a microwave radar and a video image.
Background
With the acceleration of the urbanization process and the continuous promotion of the motor vehicle reserves, the expressway is used as an intercity linkage backbone road and plays an irreplaceable role in the development of cities. The highway is different from the urban road in speed, more trucks and large flow, and particularly, a plurality of long straight line sections exist, so that vehicle rear-end collision accidents caused by too short inter-vehicle distance can frequently occur on the highway. The long straight line section of the expressway has a certain gradient due to long section and monotonous line shape, so that under the condition of high speed, the linear condition of the straight line section makes a driver easily feel visual fatigue and generate improper operations such as fatigue driving, and the like, thereby easily causing the traffic accidents of vehicles in front of rear-end collision caused by the fact that the vehicles swing left and right, the speed is too high and the inter-vehicle distance is too short, causing casualties and road property loss.
At present, most of prevention and control methods for too short distance between vehicles on the highway are in a passive prevention and control stage, and the drivers are passively reminded through video snapshot and warning signs, so that the generated effect is not great. For dangerous vehicle distance detection, a small number of vehicles are provided with ranging detectors such as laser radars and the like, so that the vehicle distance detection effect is achieved, and most of vehicles are not equipped and cannot effectively detect the safety distance between the vehicles and the front vehicle. Therefore, a dangerous distance early warning system and a dangerous distance early warning method for a highway straight line section are urgently needed, the dangerous distance of vehicles is effectively detected, early warning information is sent out when the dangerous distance between two adjacent vehicles occurs, a driver is timely informed of taking a deceleration measure, and rear-end collision accidents are avoided.
Disclosure of Invention
In view of the above, the present invention provides a system and a method for highway dangerous distance early warning based on a geomagnetic detector.
The purpose of the invention is realized by the following technical scheme:
the invention provides a vehicle speed and distance early warning system based on a microwave radar and a video image, wherein a portal frame is arranged on a road section marked with a distance confirmation line, and the portal frame comprises the microwave radar and a camera which are arranged on the portal frame, an early warning information output system and a controller;
the microwave radar, the camera and the early warning information output system are respectively in communication connection with the controller;
the installation directions of the microwave radar and the camera point to the opposite direction of the traffic direction of the early warning road;
the early warning road is provided with a reference line perpendicular to the extending direction of the road, the reference line comprises a base point line, a first early warning line and a second early warning line which are sequentially distributed along the traffic direction, and the distance between the base point line and the first early warning line and the distance between the first early warning line and the second early warning line are smaller than or equal to the traffic safety distance under different speed requirements;
the portal frame is arranged at a position 5-10m of the second early warning line along the traveling direction;
the base point line, the first early warning line and the second early warning line are all located in the detection range of the microwave radar.
Further, the early warning information output system comprises an electronic display screen and a voice alarm;
the electronic display screen is arranged on the portal frame, and the installation direction of the display surface of the electronic display screen points to the opposite direction of the driving direction of the early warning road;
the voice warning device is arranged on two sides of a road at the vehicle distance confirmation line, the voice warning device faces towards the lane, and an acute angle is formed between a sound emitting surface of a loudspeaker of the voice warning device and the extending direction of the early warning road.
Further, the length of the reference line is larger than the width of the early warning road.
Furthermore, two lane boundaries parallel to the extending direction of the road are arranged on the boundaries of two sides of the early warning road, and the two lane boundaries are intersected with the reference line.
Further, the side of the early warning road is provided with a vehicle distance confirmation sign corresponding to each reference line and the vehicle distance confirmation line, the vehicle distance confirmation sign corresponding to the base line is marked with an initial distance of 0m, and the vehicle distance confirmation signs corresponding to the first early warning line and the second early warning line are marked with a distance between the early warning line and the base line.
Furthermore, the side of the early warning road is provided with an illuminating lamp corresponding to each reference line, and the emitting direction of the illuminating lamp points to the reference line.
The invention also provides a vehicle speed and distance early warning method adopting the early warning system, which comprises the following steps:
s1, when the vehicle reaches the early warning road section, the microwave radar detects the vehicle speed of the vehicle and the distance between the vehicle and the position of the microwave radar, and then the vehicle speed and the distance are uploaded to the controller;
s2, when the vehicle triggers the base point line, the controller issues an instruction to enable the camera to capture an image, and searches whether a front vehicle exists in the current lane detection area, if the front vehicle does not exist, the early warning is not needed, and if the front vehicle exists, the next step is carried out;
s3, detecting by a microwave radar to obtain the speed and position of the front vehicle, calculating the distance between two adjacent vehicles on the same lane by the controller through a built-in algorithm, and judging whether the distance between the two vehicles accords with the safe distance or not by combining the speed of the rear vehicle;
if the speed of the rear vehicle is more than 100km/h and the distance between the rear vehicle and the front vehicle is less than 100 meters, or the speed of the rear vehicle is less than or equal to 100km/h and the distance between the rear vehicle and the front vehicle is less than 50 meters, judging that the driving distance between the rear vehicle and the front vehicle does not accord with the safe vehicle distance, and sending an instruction to a controller to trigger a camera to capture an image and transmitting the image to a memory;
and S4, after the controller judges that the following distance between the rear vehicle and the front vehicle does not accord with the safe distance, the controller transmits the current speed of the rear vehicle and the distance between the rear vehicle and the front vehicle to the electronic display screen, and meanwhile, the voice warning device arranged beside the distance confirmation line gives out a warning sound to warn and remind a driver of the rear vehicle to pay attention to deceleration.
Further, in step S2, the controller determines whether the rear vehicle triggers the base point line or not through the distance data uploaded by the microwave radar, and if the rear vehicle triggers the base point line, the controller issues an instruction to enable the camera to capture an image.
Further, if the horizontal distance from the head of the rear vehicle to the position of the microwave radar is smaller than the horizontal distance from the base point line to the position of the microwave radar, the rear vehicle is judged to trigger the base point line, and the controller issues an instruction to enable the camera to capture images.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the expressway dynamic vehicle speed and distance early warning method and system based on the microwave radar and the video images can simultaneously realize monitoring and early warning of the vehicle speed and the vehicle distance, and are technically feasible to operate and simple in principle on the method; the microwave radar and the camera are adopted to acquire the vehicle information, so that the precision and the reliability are high; in addition, the early warning system is convenient to arrange, the device is less, the cost is lower, and monitoring, evidence obtaining and early warning of dynamic driving speed and driving distance can be realized by combining a radar, a camera, an electronic display screen and three voice warning devices with a reference line.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
The drawings of the present invention are described below.
FIG. 1 is a schematic diagram of an embodiment of the present invention.
FIG. 2 is a flow chart of an early warning method according to an embodiment of the present invention;
Detailed Description
In order to make the technical solutions, advantages and objects of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the present application.
The invention is further illustrated by the following figures and examples.
Example 1
As shown in fig. 1, the present embodiment provides a vehicle speed and distance early warning system based on microwave radar and video images, a portal frame is arranged at a road section marked with a distance confirmation line, a microwave radar (10), a camera (20) and an electronic display screen (30) are arranged above the portal frame (110), and a voice warning device (40) is arranged beside the distance confirmation line (70);
the installation directions of the microwave radar (10), the camera (20) and the electronic display screen (30) all point to the opposite direction of the early warning road (50), and the voice warning device (40) is installed laterally towards the vehicle distance confirmation line (70) at a certain inclination angle, so that a driver can smoothly hear voice information sent by the voice warning device;
the early warning road (50) is provided with a reference line (80) perpendicular to the extending direction of the road, the reference line (80) comprises a base point line (80-1), a first early warning line (80-2) and a second early warning line (80-3), and the distance between the base point line (80-1) and the early warning line (80-2) and the distance between the early warning lines (80-3) are smaller than or equal to the driving safety distance under different speed requirements. In the implementation, the distance from the base point line (80-1) to the early warning line (80-2) is 50m, and the distance from the base point line (80-1) to the early warning line (80-3) is 100 m.
The base line (80-1), the first early warning line (80-2) and the second early warning line (80-3) are all located in the detection range of the microwave radar (10).
As shown in fig. 2, in the present embodiment, a solid line boundary (60) parallel to the extending direction of the road is disposed on the warning road (50), and the two solid line boundaries (60) are disposed at the boundary of the warning road (50) and intersect with the reference line (80). The solid line boundary (60) is used for prohibiting vehicles in adjacent lanes from changing into the early warning road (50) so as not to influence the evidence obtaining judgment of the inter-vehicle distance.
Based on the image captured by the camera (20), whether the following distance between the rear vehicle and the front vehicle meets the safe distance can be directly judged according to the position relation between the vehicle and the reference line. To further enhance the effectiveness of the evidence collection, the detection information (including but not limited to the detection time, the speed of the rear vehicle, and the distance between the rear vehicle and the front vehicle) of the microwave radar (10) can be transmitted to the controller along with the snapshot image and stored in the memory.
As shown in fig. 2, in this embodiment, in order to remind the driver of paying attention to the following distance, the arrangement is performed in combination with the current national standard for vehicle distance confirmation, a white broken line vehicle distance confirmation line (70) is arranged beside a base point line (80-1), and a vehicle distance confirmation sign (90) drawn with a "0 m" character is further arranged beside the base point line to indicate that the line is a distance judgment start line; similarly, a white broken line vehicle distance confirmation line (70) is arranged beside the first early warning line (80-2) and the second early warning line (80-3), and vehicle distance confirmation signs (90) with characters of '50 m' and '100 m' are arranged beside the first early warning line and the second early warning line respectively and show that the lines are reference lines for distance judgment.
In this embodiment, for guaranteeing to clearly shoot the image of judging the driving interval and satisfying the demand of collecting evidence under the lower circumstances of luminance such as night or overcast and rainy weather, the side of early warning road (50) corresponds each reference line (80) and the vehicle distance confirms that sign (90) are equipped with light (100), sign (90) are confirmed to the transmission direction directional reference line (80) and the vehicle distance of light (100), can clearly see back car sign in the image that obtains like this, reference line (80) position, both satisfy the demand of collecting evidence and can also judge the driving interval of back car and front car.
As shown in fig. 1, in the present embodiment, the length of the reference line (80) is greater than the width of the warning road (50), which facilitates the determination of the position relationship between the reference line (80) and the vehicle having a vehicle body width greater than the width of the warning road (50), thereby facilitating the following driver to visually confirm whether the following distance from the preceding vehicle is in accordance with the safety distance.
In the embodiment, the microwave radar (10), the camera (20) and the electronic display screen (30) are arranged 8 meters downstream of the second early warning line (80-3), the installation direction is opposite to the road extension direction, the voice warning device (40) is arranged beside the illuminating lamp (100) by the same installation method, the emission direction points to the vehicle distance confirmation line and the reference system (80), and the embodiment is provided with three illuminating lamps, namely 100-1, 100-2 and 100-3; meanwhile, the base point line (80-1) is located in a detection area of the microwave radar (10), when the distance between the head of the rear vehicle and the microwave radar (10) is smaller than the distance between the base point line (80-1) and the microwave radar (10), the rear vehicle is judged to trigger the base point line (80-1), the controller issues an instruction to enable the camera (20) to capture an image, and the electronic display screen (30) and the voice alarm (40) send out warning information to a driver of the rear vehicle.
As shown in fig. 1, the method for warning a dynamic vehicle speed and vehicle distance on a highway based on a microwave radar and a video image provided in this embodiment includes the following steps:
s1, when the vehicle reaches the early warning road section (50), the microwave radar (10) detects the vehicle speed of the vehicle and the distance between the vehicle and the position of the microwave radar (10), and then the vehicle speed and the distance are uploaded to the controller;
s2, when the vehicle triggers the base point line (80-1), the controller gives an instruction to enable the camera (20) to capture an image, and searches whether a front vehicle exists in the current lane detection area, if the front vehicle does not exist, the early warning is not needed, and if the front vehicle exists, the next step is carried out;
s3, detecting by a microwave radar (10) to obtain the speed and position of the front vehicle, calculating the distance between the front vehicle and the rear vehicle adjacent to the same lane by the controller through a built-in algorithm, and judging whether the distance between the two vehicles accords with the safe distance or not by combining the speed of the rear vehicle;
if the speed of the rear vehicle is more than 100km/h and the distance between the rear vehicle and the front vehicle is less than 100 meters, or the speed of the rear vehicle is less than or equal to 100km/h and the distance between the rear vehicle and the front vehicle is less than 50 meters, the distance between the rear vehicle and the front vehicle is judged not to accord with the safe vehicle distance, and the controller gives an instruction to trigger the camera (20) to capture an image and transmit the image to the memory.
And S4, after the controller judges that the following distance between the rear vehicle and the front vehicle does not accord with the safe distance, the controller transmits the current speed of the rear vehicle and the distance between the rear vehicle and the front vehicle to the electronic display screen (30), and meanwhile, the voice warning device (40) arranged beside the distance confirmation line (70) gives out early warning sound to warn and remind a driver of the rear vehicle to pay attention to deceleration.
In the embodiment, dynamic vehicle speed and distance early warning of one lane or multiple lanes can be realized only by arranging a group of microwave radar (10), a camera (20), a voice warning device (40) and an electronic display screen (30) and combining a reference line (80), a distance confirmation line (70), a solid line boundary line (60) and a distance confirmation sign (90), so that the investment and maintenance cost is low, the evidence obtaining effect is strong, and the popularization and the application are convenient.
All the devices provided by the embodiment are in communication connection, the memory is used for storing information detected by the microwave radar (10) and images captured by the camera (20), and the controller can execute program instructions which are called by the controller to execute the steps.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered in the protection scope of the present invention.
Claims (9)
1. The utility model provides a speed of a motor vehicle car apart from early warning system based on microwave radar and video image sets up a portal frame in the highway section of drawing the vehicle apart from affirmation line which characterized in that: the system comprises a microwave radar and a camera which are arranged on a portal frame, and also comprises an early warning information output system, a memory and a controller;
the microwave radar, the camera, the early warning information output system and the memory are respectively in communication connection with the controller;
the installation directions of the microwave radar and the camera point to the opposite direction of the traffic direction of the early warning road;
the early warning road is provided with a reference line perpendicular to the extending direction of the road, the reference line comprises a base point line, a first early warning line and a second early warning line which are sequentially distributed along the traffic direction, and the distance between the base point line and the first early warning line and the distance between the first early warning line and the second early warning line are smaller than or equal to the traffic safety distance under different speed requirements;
the portal frame is arranged at a position 5-10m of the second early warning line along the traveling direction;
the base point line, the first early warning line and the second early warning line are all located in the detection range of the microwave radar.
2. The microwave radar and video image-based vehicle speed and distance early warning system as claimed in claim 1, wherein: the early warning information output system comprises an electronic display screen and a voice warning device;
the electronic display screen is arranged on the portal frame, and the installation direction of the display surface of the electronic display screen points to the opposite direction of the driving direction of the early warning road;
the voice warning device is arranged on two sides of a road at the vehicle distance confirmation line, the voice warning device faces towards the lane, and an acute angle is formed between a sound emitting surface of a loudspeaker of the voice warning device and the extending direction of the early warning road.
3. The microwave radar and video image-based vehicle speed and distance early warning system as claimed in claim 1, wherein: the length of the reference line is larger than the width of the early warning road.
4. The microwave radar and video image-based vehicle speed and distance early warning system as claimed in claim 1, wherein: two lane boundary lines parallel to the extending direction of the road are arranged on the boundaries of the two sides of the early warning road, and the two lane boundary lines are intersected with the reference line.
5. The microwave radar and video image-based vehicle speed and distance early warning system as claimed in claim 1, wherein: and distance confirmation signs are arranged beside the early warning road corresponding to the reference lines and the distance confirmation lines, the distance confirmation signs arranged corresponding to the base line lines are marked with a starting distance of 0m, and the distance between the early warning line and the base line is marked on the distance confirmation signs arranged corresponding to the first early warning line and the second early warning line.
6. The microwave radar and video image based highway dynamic vehicle speed and distance early warning system according to claim 1, wherein: and illuminating lamps are arranged at the sides of the early warning roads corresponding to the reference lines, and the emitting directions of the illuminating lamps point to the reference lines.
7. A vehicle speed and distance early warning method adopting the vehicle speed and distance early warning system of any one of claims 1 to 6, characterized by comprising the following steps:
s1, when the vehicle reaches the early warning road section, the microwave radar detects the vehicle speed of the vehicle and the distance between the vehicle and the position of the microwave radar, and then the vehicle speed and the distance are uploaded to the controller;
s2, when the vehicle triggers the base point line, the controller issues an instruction to enable the camera to capture an image, and searches whether a front vehicle exists in the current lane detection area, if the situation that the front vehicle does not need to be pre-warned does not exist, the pre-warning process is finished; if yes, go to step S3;
s3, detecting by a microwave radar to obtain the speed and position of the front vehicle, calculating the distance between two adjacent vehicles on the same lane by the controller through a built-in algorithm, and judging whether the distance between the two vehicles accords with the safe distance or not by combining the speed of the rear vehicle;
if the speed of the rear vehicle is more than 100km/h and the distance between the rear vehicle and the front vehicle is less than 100 meters, or the speed of the rear vehicle is less than or equal to 100km/h and the distance between the rear vehicle and the front vehicle is less than 50 meters, judging that the driving distance between the rear vehicle and the front vehicle does not accord with the safe vehicle distance, and sending an instruction to a controller to trigger a camera to capture an image and transmitting the image to a memory;
and S4, after the controller judges that the following distance between the rear vehicle and the front vehicle does not accord with the safe distance, the controller transmits the current speed of the rear vehicle and the distance between the rear vehicle and the front vehicle to the electronic display screen, and meanwhile, the voice warning device arranged beside the distance confirmation line gives out a warning sound to warn and remind a driver of the rear vehicle to pay attention to deceleration.
8. The vehicle speed and distance early warning method according to claim 7, characterized in that: in step S2, the controller determines whether the rear vehicle triggers the base point line according to the distance data uploaded by the microwave radar, and if the rear vehicle triggers the base point line, the controller issues an instruction to enable the camera to capture an image.
9. The vehicle speed and distance early warning method according to claim 8, characterized in that: if the horizontal distance from the head of the rear vehicle to the position of the microwave radar is smaller than the horizontal distance from the base point line to the position of the microwave radar, the rear vehicle is judged to trigger the base point line, and the controller issues an instruction to enable the camera to capture images.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011110951.6A CN112216111A (en) | 2020-10-16 | 2020-10-16 | Vehicle speed and distance early warning system and method based on microwave radar and video image |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011110951.6A CN112216111A (en) | 2020-10-16 | 2020-10-16 | Vehicle speed and distance early warning system and method based on microwave radar and video image |
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| CN112216111A true CN112216111A (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011110951.6A Withdrawn CN112216111A (en) | 2020-10-16 | 2020-10-16 | Vehicle speed and distance early warning system and method based on microwave radar and video image |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113034973A (en) * | 2021-03-23 | 2021-06-25 | 浙江科技学院 | Intelligent indicating system and method for highway safety distance |
| CN113034974A (en) * | 2021-03-23 | 2021-06-25 | 浙江科技学院 | Expressway safety vehicle distance dynamic warning device and warning method thereof |
| CN113702963A (en) * | 2021-09-24 | 2021-11-26 | 河南交投通汇高速公路有限责任公司 | Road early warning method and device based on vision and microwave detection and electronic equipment |
| CN114973713A (en) * | 2022-05-23 | 2022-08-30 | 交通运输部科学研究院 | Anti-misrun intelligent early warning system and method for highway reconstruction and extension project |
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| CN113034973A (en) * | 2021-03-23 | 2021-06-25 | 浙江科技学院 | Intelligent indicating system and method for highway safety distance |
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| CN114973713B (en) * | 2022-05-23 | 2023-11-14 | 交通运输部科学研究院 | Anti-false-running intelligent early warning system and method for highway reconstruction and expansion engineering |
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