CN111366927A - Highway traffic state perception system based on wide area radar - Google Patents
Highway traffic state perception system based on wide area radar Download PDFInfo
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0108—Measuring and analyzing of parameters relative to traffic conditions based on the source of data
- G08G1/0116—Measuring and analyzing of parameters relative to traffic conditions based on the source of data from roadside infrastructure, e.g. beacons
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- G—PHYSICS
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- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
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- G—PHYSICS
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- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
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- G08G1/0133—Traffic data processing for classifying traffic situation
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Abstract
The invention discloses a highway traffic state sensing system based on a wide area radar, which belongs to the technical field of traffic state monitoring and comprises a wide area radar subsystem, a data transmission network and a central platform which are sequentially connected; the wide area radar subsystem is used for collecting traffic data and accessing a data transmission network; the data transmission network is used for transmitting the traffic data to the central platform; the central platform is used for carrying out event detection, track tracking, event prediction analysis, historical event statistics and equipment management on traffic data. The invention solves the problems that the existing traffic state sensing system is too dependent on hardware and network resources, the timeliness is low, and the road condition cannot be sensed in time under the severe weather condition.
Description
Technical Field
The invention belongs to the technical field of traffic state monitoring, and relates to a highway traffic state sensing system based on a wide-area radar.
Background
With the development of society and economy, the number of vehicles rapidly increases, and the traffic flow of the expressway is larger and larger. Meanwhile, the requirements of people on the traffic service level are higher and higher. The contradiction of how to realize and guarantee faster, more efficient and safer traffic under the increasing traffic pressure is more and more prominent.
To realize and guarantee faster, more efficient and safer traffic, the first-hand information of a traffic site needs to be mastered timely and accurately, and pre-judgment and decision-making are made according to actual conditions and historical data, so that the site problems are solved, the traffic smoothness is guaranteed, and accidents are prevented.
Most of the existing traffic state sensing systems adopt a video analysis technology, depend too much on network environment and server resources, are low in timeliness, and can not sense road conditions in time due to the fact that the existing traffic state sensing systems are easily seriously interfered in complex environments of rain, snow and smoke.
Therefore, in order to solve the above problems, the present invention provides a wide area radar-based highway traffic status sensing system.
Disclosure of Invention
The invention aims to: the highway traffic state sensing system based on the wide area radar is provided, and the problems that an existing traffic state sensing system is too dependent on hardware and network resources, timeliness is low, and road conditions cannot be sensed in time under severe weather conditions are solved.
The technical scheme adopted by the invention is as follows:
a highway traffic state perception system based on wide area radar comprises a wide area radar subsystem, a data transmission network and a central platform which are connected in sequence;
the wide area radar subsystem is used for collecting traffic data and accessing a data transmission network;
the data transmission network is used for transmitting the traffic data to the central platform;
the central platform is used for carrying out event detection, track tracking, event prediction analysis, historical event statistics and equipment management on traffic data.
Furthermore, the wide area radar subsystem comprises a wide area radar, a power supply module and network equipment, wherein the wide area radar is respectively connected with the power supply module and the network equipment, the power supply module supplies power to the wide area radar, and the traffic data collected by the wide area radar is accessed into the data transmission network through the network equipment.
Furthermore, the wide area radar subsystem is installed on a stand column, a cantilever or a portal frame on the side of the highway, the wide area radar points to the direction of the coming vehicle, the installation height is 6-10 meters, and the downward depression angle is not more than 9 degrees.
Further, the wide area radar employs a millimeter wave radar.
Furthermore, the data transmission network adopts an ethernet network, and an ethernet transmission channel is provided for each wide area radar to the central platform through the data forwarding server.
Further, the central platform comprises an event detection server, a database server, a data analysis server and a web server; the event detection server is respectively connected with the database server and the web server, the database server is connected with the data analysis server, and the data analysis server is connected with the web server;
the event detection server is used for data transmission and decoding of the wide area radar subsystem and the database server, and meanwhile event detection and track tracking are carried out on traffic data to obtain traffic data information;
the database server is used for data storage, data management and data interaction;
the data analysis server is used for further integrating and analyzing, deeply mining and intelligently analyzing the data to realize event prediction analysis and historical event statistics;
the web server is used for realizing the management of the equipment, responding to the request of a user, providing a human-computer interface, browsing real-time information and inquiring historical information through the human-computer interface, and searching specific data through combined inquiry.
Further, the event detection comprises vehicle behavior analysis and abnormal target detection, wherein the vehicle behavior analysis comprises parking, slow running, overspeed, congestion, retrograde running, throwing, detouring and emergency lane occupation detection; the abnormal target detection comprises pedestrian, non-motor vehicle and motorcycle detection.
Further, the traffic data information includes event detection information and object motion information;
the event detection information comprises a vehicle behavior analysis result and an abnormal target detection result;
the target motion information includes a target ID, an X position, a Y position, an X speed, a Y speed, and a target length.
Furthermore, the central platform further comprises an alarm unit connected with the data analysis server and the web server, and when the data analysis server analyzes the data, the alarm is automatically triggered and pushed to the web interface once the parameters exceed the preset alarm threshold value.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the wide area radar subsystem is used for continuously detecting the instant position and speed information of each vehicle in a road, and the data analysis server at the platform center is matched with the event detection server to provide basic data for the intelligent high speed and vehicle road cooperation, so that the comprehensive traffic perception capability is realized. Whether in daytime or at night, whether in heavy fog or rain or snow, whether someone is on duty or not, the road condition can be monitored timely, accurately and automatically, abnormal conditions can be found timely, and the abnormal conditions are provided for on duty personnel and superior systems, so that the abnormal conditions can be responded and processed timely, traffic smoothness is guaranteed, and accidents are avoided.
2. The wide area radar subsystem is arranged on a stand column, a cantilever or a portal frame on the side of the highway, is convenient to install and use, small in size, light in weight and low in power consumption, realizes full-automatic monitoring on the road surface through real-time operation and detection on data such as the driving state and the driving track of a vehicle, finds special events in time, effectively avoids further deterioration of adverse events, and realizes automation of road monitoring.
3. The central platform comprises an event detection server, a database server, a data analysis server and a web server, has strong background functions, provides the functions of equipment management, data acquisition, perception display, alarm processing, statistical analysis and the like, adopts a three-layer framework, can run across platforms, supports the current common running environment, can also provide a secondary development interface, and is convenient to integrate into a larger-scale system.
4. The traffic data information comprises event detection information and target motion information, the data are diversified, comprehensive and diversified road traffic perception capability is provided, digitalized instant information of each vehicle is provided, the functions of vehicle detection, event detection, vehicle tracking, abnormal alarming and the like in a monitoring area are realized, the driving state of the road vehicle is converted into a group of data representing the position, the speed and the length of the vehicle through a wide area radar, and the digitization of the position and the speed information of the vehicle is realized.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without inventive effort, wherein:
FIG. 1 is a connection block diagram of a wide area radar-based highway traffic status sensing system;
FIG. 2 is a block diagram of the wide area radar subsystem connections of the present invention;
fig. 3 is a system block diagram of a first embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described herein and illustrated in the figures may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples and the accompanying drawings.
Example one
In a preferred embodiment of the present invention, a highway traffic status sensing system based on wide area radar is provided, as shown in fig. 1, comprising a wide area radar subsystem, a data transmission network and a central platform, which are connected in sequence;
the wide area radar subsystem is used for collecting traffic data and accessing a data transmission network;
the data transmission network is used for transmitting the traffic data to the central platform;
the central platform is used for carrying out event detection, track tracking, event prediction analysis, historical event statistics and equipment management on traffic data; the central platform displays the data information and stores the data information into the database, so that a user can inquire the information, generate a report and configure a wide area radar subsystem, and the tracking of the specific vehicle track across the radar can be further realized.
Further, as shown in fig. 2, the wide area radar subsystem includes a wide area radar, a power module, and a network device, the wide area radar is connected to the power module and the network device through a dedicated data line, the power module supplies power to the wide area radar, and the traffic data collected by the wide area radar is accessed to the data transmission network through the network device. A wide area radar subsystem is installed at the distance of the biggest 250 meters of road both sides at every interval, and this embodiment adopts 80 wide area radars to realize whole journey control, 40 on every side of road installation in 10 kilometers test section scope.
Furthermore, the wide area radar subsystem is installed on an upright post, a cantilever or a portal frame on the side of the highway, is convenient to install and use, small in size, light in weight and low in power consumption, realizes full-automatic monitoring on the road surface through real-time operation and detection on data such as the running state and the running track of a vehicle, finds special events in time, effectively avoids further deterioration of adverse events and realizes automation of road monitoring;
the wide area radar points to the direction of the coming vehicle, the installation height is 6-10 meters, the downward depression angle is not more than 9 degrees, the installation height of the wide area radar in the embodiment is unified to be 8 meters away from the road surface, the wide area radar is fixed on the upright post by using a matched installation support through a steel belt, the installation angle is adjusted according to needs, and during installation, a special cable for the radar is laid to the equipment box from the inside of the upright post;
the power supply module and the network equipment are arranged on the upright post or in the equipment box near the upright post; the power supply module provides single-phase 220V alternating current for the wide area radar, the power is not less than 30W, necessary length is reserved for a power supply cable to be under a pole or in an equipment box during installation, and a single-phase power supply lightning arrester is arranged for the power supply cable; the network equipment is provided with an 10/100M self-adaptive interface, the actual transmission bandwidth is not lower than 2Mbps, network cables with necessary length are reserved under the rod or in the equipment box during installation, the specification of the network cables is not lower than five types, and a network arrester is arranged for the network cables.
Furthermore, the wide area radar is a millimeter wave radar, in this embodiment, the wide area radar is a wide area forward traffic radar detector T42 of Smartmicro, germany, and is the only traffic radar adopting 4D/UHD detection technology, and the wide area radar adopts FMCW ranging, Doppler velocity measurement, multiple beam angle measurement, and a combination of multiple detection technologies to realize 4D/UHD (ultra high Definition model) detection, and has a wide detection range, and the wide area radar has the longest detection distance in a fixed detector, and can detect moving and static targets in a range of up to 8 lanes and 300 meters. The all-solid-state structure, all-weather stable work, no moving mechanical structure, no need of daily maintenance, reliable and long service life, no maintenance in the life cycle, and the main technical parameters are as follows:
emission power: 12.7 dBm; baseband frequency: 24.0-24.25 GHz; maximum detection distance: 340 m; minimum detection distance: 1.5 m; distance detection accuracy: less than 2.5% or 0.25 meters; speed detection range: 0-320 km/h; speed detection accuracy: less than 1% or 1 km/h; viewing angle: 16 degrees; working temperature: -40 ℃ to 74 ℃; protection grade: IP 67; power supply: 13-32 VDC; power consumption: < 10.5W.
The single wide area radar detection area can cover a bidirectional 8-lane range with the depth of 300 meters, can detect information of up to 256 targets in a tracking area, provides position (coordinate), speed and length information of the targets, and updates data every 30 milliseconds; the relay installation of the plurality of wide area radars can realize the whole-process monitoring of the road traffic and the whole-process perception of the road traffic state. The wide area radar monitors road traffic in the whole course, records the running data of passing vehicles in the whole course, can accumulate complete and detailed traffic flow data, and facilitates the realization of big data analysis, traffic situation prejudgment and prediction in the later period.
Further, as shown in fig. 3, the data transmission network adopts an ethernet network, an ethernet transmission channel is provided for each wide area radar to the central platform through the data forwarding server, an 10/100M adaptive RJ45 port is provided under the rod, and the transmission bandwidth is not less than 2 Mbits/s. Specifically, the data forwarding server decodes the data packet according to a radar communication protocol, decodes target position and speed data, encapsulates the target position and speed data into an Ethernet data frame, and forwards the Ethernet data frame to the event detection server and the database server of the central platform.
Further, the central platform comprises an event detection server, a database server, a data analysis server and a web server; the event detection server is respectively connected with the database server and the web server, the database server is connected with the data analysis server, the data analysis server is connected with the web server, the background function is strong, the functions of equipment management, data acquisition, perception display, alarm processing, statistical analysis and the like are provided, a three-layer framework is adopted, cross-platform operation can be realized, the current common operation environment is supported, a secondary development interface can also be provided, and the system is conveniently integrated into a larger-scale system;
the event detection server is used for data transmission and decoding of the wide area radar subsystem and the database server, integrity, consistency and uniqueness of data are guaranteed, and meanwhile event detection and track tracking are carried out on traffic data to obtain traffic data information;
the database server is used for data storage, data management and data interaction, and realizing data access, query, backup and recovery, the database server needs at least 4TB storage space, and can also be built by adopting the existing calculation and storage resources of a highway monitoring center;
the data analysis server is used for further integrating and analyzing, deeply mining and intelligently analyzing the data to realize event prediction analysis and historical event statistics;
specifically, after an event detection server and a database server of a central platform receive target position and speed data sent by a data forwarding server, the event detection server performs event detection on all targets in a current radar monitoring range by combining analyzed information such as target position and speed; the database server performs historical target data precipitation and analysis result storage and sends the historical target data precipitation and analysis result storage to the data analysis server; the data analysis server intelligently analyzes the data according to the time as a window so as to predict the traffic incident scene;
the web server is used for responding to a user request, providing a human-computer interface, browsing real-time information and inquiring historical information through the human-computer interface, and searching specific data through combined inquiry.
Specifically, the web server may obtain the prediction information after the intelligent analysis through the data analysis server, obtain the near-real-time event alarm message through the event detection server, and then display the information on the user page.
The user page includes: the system comprises an equipment list page, an equipment state page, an equipment configuration page, a main information window, a data query and report management page and an account management page;
the device list page displays the names, positions and working states of all wide area radars in the system, and an authorized user can perform operations of adding, deleting and searching radars;
the equipment state page displays equipment states, display equipment data and inquiry historical data, and the display equipment states specifically display online and offline states, program versions and equipment models; displaying the wide area radar detection data in real time by the display equipment data, and displaying the IDs, positions and speeds of all vehicles detected by the wide area radar in a mode of a field plan view and a dynamic icon; querying historical data, specifically querying historical traffic parameter data and historical event detection data of the wide area radar;
in the equipment configuration page, authorized personnel can manage and configure parameters of any wide area radar, and manage the wide area radar in working state monitoring and checking, parameter setting, function enabling and the like, so that the operation and maintenance management of the system is facilitated. The method specifically comprises the following steps: renaming the device; selecting a wide area radar communication interface, and selecting whether wide area radar data is output through a serial port or a network port; lane setting and name definition, the user can define the lane name by self, such as: 1. 2, 3 lanes, emergency lanes, overtaking lanes, etc.; wide area radar coordinate setting: set up highway section, stake number, the direction of wide area radar position, if: g92+ K485. After setting, the vehicle position information is displayed as G92+ K485+ 20; setting an IP address, wherein network parameters such as the IP address, the gateway address, the target address and the like of the wide area radar can be set; setting event detection parameters: the method comprises the steps of monitoring an event area, a low-speed alarm threshold value, an overspeed alarm threshold value, a parking alarm time threshold value, road congestion detection parameters and the like;
the main information window displays event information reported by all wide area radars in a rolling mode, and displays time, places, wide area radar numbers, event types and event detail parameters of events;
the data query and report management page can query historical data and can perform operations such as screening and searching on the historical data; adding, deleting and modifying the format and content of the report form, and automatically generating a defined report form; the user can select elements such as time, interval, equipment ID, direction, detection area ID, event type, target information (position, speed, length) and the like, and output a report according to the content selected by the user;
the account management page performs user registration, login, authority management and the like.
Furthermore, the event detection server, the database server, the data analysis server and the web server can be installed in the cabinet in a centralized manner, access to the user network through the Ethernet switch and power supply by adopting a UPS (uninterrupted power supply);
in the embodiment, the servers are all 2U rack servers, and the main parameters of the servers are that a processor is E5-2620V4 with 1 piece capable of being expanded to 2 pieces, a memory is ECC DDR 416G and supports 24 memory slots, a hard disk is 2 × 480G solid SAS and supports 8 hard disk hot plug slots, an array card is built-in and at least supports RAID0/1, a network card is a four-kilomega port network card, and a power supply is 750W;
the Ethernet switch adopts a 1U rack type three-layer switch, and the main parameters are as follows: 16 10/100/1000M Ethernet ports; back plate capacity: 336G; packet forwarding rate: 30 Mpps.
Specifically, the operating system of the Server adopts Microsoft Windows Server, the management system of the database Server adopts Microsoft SQL Server, the application software supports cross-platform access, and a mainstream Linux operating system and a MySQL database can be adopted. The user may access the central platform software interface through multiple browsers for multiple operating systems. The sharing is realized through the database, and the traffic data can be conveniently merged into a higher-level application platform by being connected with a third-party platform in a dynamic library mode.
Further, the event detection comprises vehicle behavior analysis and abnormal target detection, wherein the vehicle behavior analysis comprises parking, slow running, overspeed, congestion, retrograde running, throwing, detouring and emergency lane occupation detection; the abnormal target detection comprises pedestrian, non-motor vehicle and motorcycle detection.
Specifically, parking and slow moving detection: when the speed of the vehicle is lower than the set speed, a slow running alarm is triggered, and when the vehicle stops completely, a stopping alarm is triggered;
overspeed detection: when the speed is higher than the set speed, triggering an overspeed alarm;
congestion detection: when the density of vehicles in the area rises and the average speed drops, the road section congestion alarm is triggered;
and (3) reverse detection: when the vehicle runs in the wrong direction and backs a car, triggering a wrong-way alarm;
detecting pedestrians, non-motor vehicles and motorcycles: triggering an alarm when pedestrians, non-motor vehicles and motorcycles appear in the expressway;
and (3) detecting the sprinkled objects: triggering a projectile alarm when a suspected projectile target appears;
and (3) detour detection: when a vehicle generally bypasses a certain area, the area is suspected to have a problem, and a detour alarm is triggered;
and (3) occupying emergency lane detection: when the vehicle enters and occupies the emergency lane, the emergency lane occupation alarm is triggered.
Furthermore, the traffic data information comprises event detection information and target motion information, the data are diversified, comprehensive and diversified road traffic perception capability is provided, digitalized instant information of each vehicle is provided, the functions of vehicle detection, event detection, vehicle tracking, abnormal alarming and the like in a monitoring area are realized at the same time, the driving state of the road vehicle is converted into a group of data representing the position, the speed and the length of the vehicle through a wide area radar, and the datamation of the position and the speed information of the vehicle is realized;
the event detection information comprises a vehicle behavior analysis result and an abnormal target detection result;
the target motion information comprises a target ID, an X position, a Y position, an X speed, a Y speed and a target length, wherein the target ID refers to a vehicle license plate number.
Specifically, the method may further include conventional vehicle detection data of a designated section, such as data of lane division, vehicle division type, traffic flow statistics of direction division, average speed, headway, road time occupancy, and the like, or data of lane division, vehicle division type traffic flow statistics, average speed, headway, road space occupancy of a designated area; and the central platform carries out mining analysis on the wide-area radar data again to realize the function of crossing the radar, such as the whole-course continuous tracking of a specific target. The driving state of the road vehicle is converted into a group of data representing the position, speed and length of the vehicle through a wide area radar, the datamation of the position and speed information of the vehicle is realized, the full-automatic monitoring of the road surface is realized through the real-time operation and detection of the data such as the driving state, the driving track and the like of the vehicle, special events are found in time, the further deterioration of adverse events is effectively avoided, and the automation of road monitoring is realized.
Furthermore, the central platform further comprises an alarm unit connected with the data analysis server and the web server, and when the data analysis server analyzes the data, the alarm is automatically triggered and pushed to the web interface once the parameters exceed the preset alarm threshold value.
The system continuously detects the real-time position and speed information of each vehicle in the road through the wide-area radar subsystem, provides real-time traffic parameter information, and provides basic data for intelligent high-speed and vehicle-road cooperation through the data analysis server of the platform center and the event detection server, so that the comprehensive traffic perception capability is realized. Whether in daytime or at night, whether in heavy fog or rain or snow, whether someone is on duty or not, the road condition can be monitored timely, accurately and automatically, abnormal conditions can be found timely, and the abnormal conditions are provided for on duty personnel and superior systems, so that the abnormal conditions can be responded and processed timely, traffic smoothness is guaranteed, and accidents are avoided. By adopting an advanced big data platform, the wide area radar can perform panoramic scanning perception of 4hz frequency per second on a road running environment, and echo data of packet direction angle, distance, speed and intensity are formed by scanning each time. The single sensor monitors that the distance is up to 250 meters, works under all-weather and full-illumination conditions, and adopts a high-level FPGA processing unit to gather, layer, classify, remove clutter, extract a target and calculate and combine each echo data, so as to finally form accurate data such as the size, the position, the speed, the direction, the movement track and the like of a vehicle, a pedestrian and a sprinkled object target. The system simultaneously supports mass data storage and calculation, and compared with the traditional video monitoring scheme, the system not only realizes accurate full data acquisition and monitoring of traffic operation dynamics, but also realizes accurate automatic identification and prediction of operation safety risks.
The invention is firstly adopted to detect and sense the whole-course traffic state of local road sections, and realizes the continuous coverage of a radar detection area and the whole-course seamless real-time monitoring of all vehicles in the corresponding road sections by continuously arranging wide-area radars. Through the real-time analysis to all vehicle operation data, automatic judgement all vehicle running state, the general traffic conditions and the traffic flow distribution in the palm holding region improve the perception degree to the road conditions, carry out automated inspection to unusual traffic incident, shorten judgement and the response time to unusual traffic conditions, discover hidden danger in advance to take measures to manage and control and dredge, solve the problem in the bud state. By utilizing the traffic state sensing system, the Shanghai Hangzhou expressway provides comprehensive, accurate and timely road traffic state data for realizing intelligent high speed and vehicle-road cooperation.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents and improvements made by those skilled in the art within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A highway traffic state perception system based on wide area radar which characterized in that: the system comprises a wide area radar subsystem, a data transmission network and a central platform which are connected in sequence;
the wide area radar subsystem is used for collecting traffic data and accessing a data transmission network;
the data transmission network is used for transmitting the traffic data to the central platform;
the central platform is used for carrying out event detection, track tracking, event prediction analysis, historical event statistics and equipment management on traffic data.
2. The wide-area radar-based highway traffic status sensing system according to claim 1, wherein: the wide area radar subsystem comprises a wide area radar, a power supply module and network equipment, wherein the wide area radar is respectively connected with the power supply module and the network equipment, the power supply module supplies power to the wide area radar, and traffic data collected by the wide area radar are accessed into a data transmission network through the network equipment.
3. The wide-area radar-based highway traffic status sensing system according to claim 2, wherein: the wide area radar subsystem is arranged on a stand column, a cantilever or a portal frame on the side of the highway, the wide area radar points to the direction of the coming vehicle, the installation height is 6-10 meters, and the downward depression angle is not more than 9 degrees.
4. The wide-area radar-based highway traffic status sensing system according to claim 2, wherein: the wide area radar adopts a millimeter wave radar.
5. The wide-area radar-based highway traffic status sensing system according to claim 1, wherein: the data transmission network adopts an Ethernet, and an Ethernet transmission channel is provided for each wide area radar subsystem to the central platform through the data forwarding server.
6. The wide-area radar-based highway traffic status sensing system according to claim 5, wherein: the central platform comprises an event detection server, a database server, a data analysis server and a web server; the event detection server is respectively connected with a database server and a web server, the database server is connected with a data analysis server, and the data analysis server is connected with the web server;
the event detection server is used for data transmission and decoding of the wide area radar subsystem and the database server, and meanwhile event detection and track tracking are carried out on traffic data to obtain traffic data information;
the database server is used for data storage, data management and data interaction;
the data analysis server is used for further integrating and analyzing, deeply mining and intelligently analyzing the data to realize event prediction analysis and historical event statistics;
the web server is used for realizing the management of the equipment, responding to the request of a user, providing a human-computer interface, browsing real-time information and inquiring historical information through the human-computer interface, and searching specific data through combined inquiry.
7. The wide-area radar-based highway traffic status sensing system according to claim 6, wherein: the event detection comprises vehicle behavior analysis and abnormal target detection, wherein the vehicle behavior analysis comprises the detection of parking, slow running, overspeed, congestion, retrograde motion, tossing, detouring and emergency lane occupation; the abnormal target detection comprises pedestrian, non-motor vehicle and motorcycle detection.
8. The wide-area radar-based highway traffic status sensing system according to claim 7, wherein: the traffic data information comprises event detection information and target motion information;
the event detection information comprises a vehicle behavior analysis result and an abnormal target detection result;
the target motion information includes a target ID, an X position, a Y position, an X speed, a Y speed, and a target length.
9. The wide-area radar-based highway traffic status sensing system according to claim 6, wherein: the central platform further comprises an alarm unit connected with the data analysis server and the web server, and when the data analysis server analyzes data, the alarm unit automatically triggers an alarm and pushes the alarm to the web interface once the parameters exceed the preset alarm threshold value.
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