CN215669120U - Active early warning system for urban expressway traffic accident risk - Google Patents
Active early warning system for urban expressway traffic accident risk Download PDFInfo
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Abstract
The utility model provides an urban expressway traffic accident risk initiative early warning system, includes control center and the variable information issuing equipment of portal formula, the variable information sign board of installation on the variable information issuing equipment of portal formula which characterized in that: the door frame type variable information issuing equipment is provided with a radar vision composite detector, a lane indicating assembly and a variable speed limiting assembly, and the control center receives the meteorological information and the traffic flow information acquired by the radar vision composite detector and transmits the control information to the variable speed limiting assembly and the lane indicating assembly for information issuing. The utility model can realize lane control, accurate speed limit and timely early warning based on traffic flow state and environmental factors.
Description
Technical Field
The utility model belongs to the technical field of intelligent traffic control systems, and particularly relates to an active early warning system for urban expressway traffic accident risks.
Background
In recent years, urban expressway congestion is increased, and accidents are frequently happened. An advanced intelligent traffic system is utilized to relieve traffic jam and prevent traffic accidents. The high-precision traffic flow data and meteorological data acquired by the detector are used for deeply mining the traffic accident precursor, analyzing the incidence relation between the traffic accident precursor characteristics and the traffic accident risk, realizing accurate identification of the traffic safety state and active early warning of the accident risk, and carrying out speed limit management and lane control by using the variable information marking plate, so that the active prevention of the traffic accident can be realized from the source, and the traffic safety level of the urban expressway is improved.
The existing urban expressway early warning system mainly has the following problems: (1) speed limit information is mostly issued through a roadside variable information sign board, and lane control cannot be realized; (2) the data acquisition information is single, and the traffic flow information, weather and other environmental information are not fully utilized, so that the speed limit control is not accurate enough. (3) The variable information sign board is not continuously arranged, and early warning information is lacked, so that the problem that a driver cannot respond in time is caused.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide an active early warning system for urban expressway traffic accident risks, which can realize lane control, accurate speed limit and timely early warning based on traffic flow states and environmental factors.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an urban expressway traffic accident risk initiative early warning system, includes control center and the variable information issuing equipment of portal formula, the variable information sign board of installation on the variable information issuing equipment of portal formula which characterized in that: the door frame type variable information issuing equipment is provided with a radar vision composite detector, a lane indicating assembly and a variable speed limiting assembly, and the control center receives the meteorological information and the traffic flow information acquired by the radar vision composite detector and transmits the control information to the variable speed limiting assembly and the lane indicating assembly for information issuing.
Further, the meteorological collecting equipment adopts a meteorological monitor.
Further, the portal variable information issuing equipment is arranged on the road surface and stretches across the road surface.
Further, the lane indicating component adopts a lane indicator DL-KSB-01.
Further, the variable speed-limiting assembly adopts an LED variable speed-limiting signboard.
Furthermore, a top plate of the portal type variable information publishing device is provided with a variable information sign plate, a plurality of signs used for installing lane indication components and variable speed limit components are connected in series below the top plate, and a radar vision composite detector is arranged between every two signs.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model can realize the real-time collection of traffic flow data and meteorological data by using the meteorological monitor and the radar vision composite detector;
2. the control center can calculate the accident occurrence probability by utilizing the collected data so as to obtain a variable speed limit and lane dynamic control scheme;
3. the variable speed-limiting component and the lane control component are added on the basis of the traditional portal variable information sign board, so that the dynamic control of the speed-limiting value and the lane closing can be realized.
4. The radar vision composite detector can realize large-area detection, simultaneously detect 4-8 lanes, detect traffic data such as flow, average speed, occupancy, headway, queuing length and the like of each lane, and can stably work under various climatic conditions.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a flow chart of the system control of the present invention;
FIG. 3 is a schematic elevation view of a door frame type variable information distribution device according to the present invention;
FIG. 4 is a schematic elevation view of a gantry-based variable information distribution apparatus according to an embodiment of the present invention in control scheme 1;
FIG. 5 is a schematic elevation view of a door frame type variable information distribution apparatus according to an embodiment in control scheme 2;
fig. 6 is an elevation view schematically showing a gantry type variable information distribution apparatus according to the embodiment in control scheme 3.
In the figure: 1. a radar vision composite detector; 2. a variable information sign board; 3. a lane indicating assembly; 4. a variable speed limit component; 5. dividing into sections; 5a, 5b, a portal variable information issuing device; 6. provided is a meteorological monitor.
Detailed Description
In order to make the technical means, objectives and effects achieved by the present invention easier to understand, the following description will further explain how to implement the present invention with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present invention provides the following technical solutions: the city expressway traffic accident risk active early warning system comprises a control center, weather collecting equipment and portal type variable information publishing equipment, wherein a variable information sign plate, a radar vision composite detector, a lane indicating assembly and a variable speed limiting assembly are mounted on the portal type variable information publishing equipment, the control center receives weather information and traffic flow information collected by the weather collecting equipment and the radar vision composite detector, calculates accident occurrence probability, obtains a speed limiting and lane control scheme, transmits control information to the variable speed limiting assembly and the lane indicating assembly, and publishes information.
In this embodiment, taking an urban expressway with a total length of 10km as an example, 1 meteorological monitor is provided, and a schematic elevation view of a portal-type variable information publishing device is shown in fig. 3, and includes a radar composite detector, a variable information sign board, a lane indicating component, and a variable speed limiting component, the devices are uniformly arranged at an interval of 1.5km, the expressway is divided into a plurality of sub-road sections, and the arrangement manner of opposite lanes is the same.
The portal variable information publishing equipment is arranged on the road surface and stretches across the road surface and is used for a road section in front of a main line, a variable information sign plate is arranged on a top plate of the portal variable information publishing equipment, a plurality of signs used for installing lane indication components and variable speed limit components are connected below the top plate in series, and a radar vision composite detector is arranged between every two signs.
Meteorological collection equipment adopts the meteorological monitoring appearance, can be to visibility, atmospheric temperature, atmospheric humidity, wind direction, wind speed, atmospheric pressure, rainfall, remote sensing road surface condition and current weather condition: detecting weather elements such as fog, rain, snow, rain and snow in the weather; the collected data can be preprocessed and processed by an algorithm, and is positioned and stored in a monitoring station memory; monitoring data can be automatically uploaded, and the uploading frequency is 1 minute; communication modes such as RS232, RS485, RJ45 network ports, GPRS wireless and the like can be provided; 220V alternating current commercial power or 12VDC solar power.
The radar-vision composite detector is based on a composite detection technology combining radar and video, and has the advantages of strong real-time perception information, wide detection range and comprehensive and accurate data. The large-area detection can be realized, 4-8 lanes are detected simultaneously, traffic data such as flow, average speed, occupancy, headway, queuing length and the like of each lane are detected, and the device can stably work under various climatic conditions.
The variable information sign board mainly realizes the publishing and display of traffic guidance information, and the content mainly comprises: traffic control information, congestion information, safety prompts and the like, and the issuing form comprises combination of characters, graphs and pictures and texts. The variable information sign board requires that the display content is clearly visible day and night, under normal conditions, when the vehicle runs at a speed of 100km/h, the displayed information is clearly recognized outside 200 meters under normal weather conditions, the speed of 40m/s can be resisted, and all luminous pixels of the display screen emit light uniformly without mosaic phenomenon.
And the traffic flow data and the meteorological data detected by the radar vision composite detector and the meteorological monitor are transmitted to the control center through a wireless network.
The lane indicating component adopts a lane indicator DL-KSB-01 for receiving a control scheme transmitted back by a control center and realizing the opening or closing of different lanes.
The variable speed-limiting assembly adopts an LED variable speed-limiting signboard and is used for receiving a speed-limiting scheme transmitted back by the control center and issuing a speed-limiting value.
And the control center sorts and calculates the acquired data to obtain an optimal control scheme.
The control scheme is transmitted to the portal variable information publishing equipment through a wireless network: the variable information sign board mainly realizes the release and display of traffic guidance information, and the content mainly comprises: traffic control information, congestion information, safety prompts and the like, the displayed contents are required to be clearly visible day and night, under the normal condition, when a vehicle runs at the speed of 100km/h, the displayed information is clearly recognized at the position of 200 meters under the normal weather condition, the speed of 40m/s can be resisted, and all luminous pixels of a display screen emit light uniformly without mosaic phenomenon; the lane indicating component receives a control scheme transmitted back by the control center to realize the opening or closing of different lanes; the variable speed-limiting component receives the speed-limiting scheme returned by the control center and issues the speed-limiting value.
The system control flow chart is shown in fig. 2, and specifically includes the following steps:
(1) firstly, calculating a variable speed limit starting threshold value according to road conditions, and providing a basis for the execution of a variable speed limit control scheme;
(2) the control center judges whether a traffic accident happens in front or not by utilizing the traffic flow data acquired by the downstream radar vision composite detector;
(3) if an accident occurs, the control scheme 1 is started, the upstream portal type variable information publishing equipment is shown in fig. 4, the variable information sign board publishes 'the accident cautious and slow movement ahead', and meanwhile, the optimal speed limit value is calculated according to traffic flow conditions, speed limit information is published, and the accident lane is closed.
(4) And if the traffic accident does not occur on the road section in front, calculating the accident risk value at the current time by using the traffic flow data and the meteorological data of the current road section and the downstream road section.
(5) If the accident risk value does not exceed the variable speed limit activation threshold, the default control scheme 2 is maintained, as shown in FIG. 5.
(6) If the accident risk value exceeds the variable speed limit starting threshold value, a control scheme 3 is started, the upstream portal type variable information issuing equipment issues 'congestion and deceleration and slow running ahead' and issues speed limit information at the same time as shown in fig. 6.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides an urban expressway traffic accident risk initiative early warning system, includes control center and the variable information issuing equipment of portal formula, the variable information sign board of installation on the variable information issuing equipment of portal formula which characterized in that: the door frame type variable information issuing equipment is provided with a radar vision composite detector, a lane indicating assembly and a variable speed limiting assembly, and the control center receives the meteorological information and the traffic flow information acquired by the radar vision composite detector and transmits the control information to the variable speed limiting assembly and the lane indicating assembly for information issuing.
2. The active urban expressway traffic accident risk early warning system according to claim 1, wherein: the meteorological acquisition equipment adopts a meteorological monitor.
3. The active urban expressway traffic accident risk early warning system according to claim 1, wherein: the portal variable information publishing device is arranged on the road surface and stretches across the road surface.
4. The active urban expressway traffic accident risk early warning system according to claim 1, wherein: the variable speed-limiting assembly adopts an LED variable speed-limiting signboard.
5. The active urban expressway traffic accident risk early warning system according to claim 1, wherein: the variable information sign board is installed on a top plate of the portal type variable information publishing equipment, a plurality of signs used for installing lane indication components and variable speed limiting components are connected below the top plate in series, and a radar composite detector is installed between every two signs.
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| CN202121097243.3U CN215669120U (en) | 2021-05-21 | 2021-05-21 | Active early warning system for urban expressway traffic accident risk |
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| CN202121097243.3U CN215669120U (en) | 2021-05-21 | 2021-05-21 | Active early warning system for urban expressway traffic accident risk |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387259A (en) * | 2022-08-26 | 2022-11-25 | 重庆交通大学 | Traffic flow control system and method for emergency and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387259A (en) * | 2022-08-26 | 2022-11-25 | 重庆交通大学 | Traffic flow control system and method for emergency and storage medium |
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