CN112562365A - Specific vehicle priority traffic control system based on high-precision positioning terminal - Google Patents
Specific vehicle priority traffic control system based on high-precision positioning terminal Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/087—Override of traffic control, e.g. by signal transmitted by an emergency vehicle
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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
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
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Abstract
The invention belongs to the technical field of traffic vehicle control, and particularly relates to a specific vehicle priority traffic control system based on a high-precision positioning terminal. The system comprises a vehicle detector, a background control center and an intelligent signal machine, wherein the vehicle detector comprises a radio frequency positioning module which is arranged near the front of each traffic intelligent signal lamp; when the system runs, when the vehicle detector detects that special vehicles needing to be preferentially passed exist, the signal is transmitted to the control center of the background through the wireless communication module, the position, the speed and other information of the special vehicles are obtained through background calculation, and the corresponding intelligent signal lamps are controlled to rapidly switch states, so that the preferential passing of the special vehicles is ensured. The system can rapidly and accurately identify the identity of special vehicles (such as buses, ambulances and the like) in urban traffic, gives the right of way with priority, ensures the smooth passing of the special vehicles and furthest ensures the passing efficiency of the special vehicles.
Description
Technical Field
The invention belongs to the technical field of traffic vehicle control, and particularly relates to a traffic vehicle control system.
Background
At present, the traffic pressure of urban roads is higher, and traffic jam still puzzles the prominent problem of urban traffic. But special vehicles such as buses, ambulances, fire trucks and the like) are often jammed at intersections or time is delayed in emergency, so that the gold time of emergency is delayed. With the rapid development of the car networking technology and the rapid promotion of the popularity of the high-precision positioning terminal equipment. The method has the advantages that the attributes of specific vehicles (urban public or special vehicles, such as buses, ambulances, fire fighting vehicles and the like) in urban traffic are rapidly and accurately identified, and a control system of traffic lights is combined, so that green lights can be effectively opened for the special vehicles in advance, higher priority is given to the special vehicles, and the road traffic efficiency is guaranteed to the greatest extent.
Disclosure of Invention
The invention aims to provide a traffic control system suitable for preferential passage of a specific vehicle, so that the vehicle needs to be released preferentially, the vehicle is planned and processed in advance, and a higher priority right of way is given, thereby realizing the purpose of preferential passage of the specific vehicle in an urban road.
When a specific vehicle runs to a related road, the traffic signal lamp control system can judge the current traffic state according to the information uploaded by the vehicle-mounted equipment and the roadside radio frequency positioning equipment, and automatically realize the adjustment of the state of the traffic signal machine through an algorithm by combining the priority traffic strategy of a corresponding system platform, so that the traffic states of the road where the specific vehicle is located and the related road are adjusted, and the special vehicle can quickly and safely pass through a crossing.
The traffic signal lamp control system for preferential traffic of specific vehicles provided by the invention is based on the principle of combining radio frequency positioning equipment vehicle detection and identification, signal processing and traffic light control to realize the function of preferential selection of traffic signals
The architecture of the traffic signal lamp control system suitable for preferential passage of a specific vehicle, which is provided by the invention, is shown in figure 1 and comprises the following components: vehicle detector, backstage control center, intelligent semaphore, wherein:
the vehicle detector comprises a radio frequency positioning module: the special vehicles which need to be preferentially selected to pass are arranged with the radio frequency label identification device in advance near the traffic signal lamps (50-100 m in front of the traffic signal lamps and adjusted according to the actual road conditions), when the special vehicles pass through the vehicle detector based on the radio frequency positioning module, the detector can quickly identify the special vehicles and transmit information back to the background control center in real time through the wireless transmission equipment; the control center judges whether the control strategy of the traffic signal lamp needs to be adjusted (such as the extension of a green light or the early start of the green light) and the strategy adjustment time of the traffic signal lamp according to the position, the running speed and the priority level of the current special vehicle, so that the special vehicle can smoothly and quickly pass through the traffic intersection without waiting when meeting the precondition, and the traffic signal lamp can quickly pass through the intersection.
The background control center: the set of traffic signal control system core device comprises the following functional modules:
(1) collecting road real-time data and special vehicle real-time data: the intelligent signal machine carries out signal interaction with each intelligent signal machine in real time, and the states of each special vehicle in the driving process and the states of traffic lights of the routes where the special vehicles drive are known and used as the precondition for making decisions for a traffic signal control system;
(2) support priority traffic vehicle information creation and priority vehicle service creation: creating priority traffic vehicle information, wherein the priority traffic vehicle information comprises adding and recording special vehicle information meeting requirements by a system platform, and the special vehicle information comprises vehicle license plates and the like; and establishing a priority vehicle service, including registering priority passing license plate information, passing intersections, service time and the like.
(3) And (3) optimizing the performance of the computing system, calculating a system performance index function according to the acquired traffic state information, signal state information and special vehicle information and a special vehicle priority algorithm, predicting and calculating special vehicle delay, intersection saturation and the like according to an adopted signal implementation strategy, determining the weight of each performance index, calculating the comprehensive performance index of the system, and providing a basis for adjusting the signal control state of the intersection or the road network.
(4) And (3) managing the prior passing vehicle information: the vehicle priority traffic condition is managed according to the priority traffic service created by the system platform, all priority traffic vehicle data lists are recorded, special vehicles are identified through the vehicle side equipment and the road side equipment, the vehicle number, the priority strategy, the position information, the driving direction, the priority traffic intersection and the priority traffic time are analyzed, and the vehicles with the priority traffic service can be monitored.
(5) And (3) management of priority traffic parameters: analyzing the current intersection traffic state and the influence degree of traffic flow in different directions of the intersection on the priority traffic decision according to the information reported by the road side equipment, configuring different traffic parameter information in a system background, filling in strategy selection, setting a priority traffic distance parameter, setting green light extension, and sensing the state of a signal lamp.
(6) And (3) managing a priority traffic policy: the system background can add different priority traffic policies, such as: the green light is prolonged, the green light starts early, the jump phase and other priority passing strategies are adopted, various priority passing schemes are provided, and strategy selection is provided for realizing the priority passing of the vehicles. After the system receives the priority request, the system evaluates the traffic running states of the intersection or the road network, such as the current queuing length of the intersection or the road network, the number of arriving vehicles during the priority implementation period, the number of driving-away vehicles in the time range and the like, according to the vehicle information provided by the system.
(7) History priority service playback: the vehicle-side or in-vehicle equipment records the traffic data of all vehicles passing preferentially, and can inquire the playback information of the vehicles passing preferentially.
(8) Priority traffic service record: the service data of all vehicles passing preferentially is recorded, the success or failure of the service state of the vehicles is recorded, the details of the service failure can be checked, and the passing service records can be inquired according to the intersection and the license plate number.
(9) And (4) decision output: and (4) according to the decision made by the obtained various data, guiding and controlling the intelligent annunciator to make signal change (such as green light extension, green light early start, jump phase and the like).
The intelligent annunciator is used as an actuating mechanism of a traffic signal control system, performs data interaction with a vehicle detector, judges whether priority requirements of priority passing are met or not, sends the priority passing requests to a background control center when the priority requirements are met, and enables special vehicles meeting the priority levels to pass through a traffic intersection smoothly and quickly.
In the present invention, the radio frequency positioning module includes: the system comprises a controller, a transceiver and a field storage computing unit; the controller is respectively connected with the transceiver and the field storage computing unit;
the invention also comprises a wireless communication module, wherein the wireless communication module is connected with the remote control terminal; the remote control terminal can control the traffic light color switching of the intelligent signal machine by sending a remote control command.
When the system is in operation, the vehicle detector detects passing vehicles according to the fixed frequency, when special vehicles needing to be preferentially passed are detected, the wireless communication module transmits signals to the background control center, the signals are received by the background control center and then are subjected to background calculation to obtain information such as the position and the speed of the special vehicles, corresponding intelligent signal lamps are controlled to carry out state fast switching, and the preferential passing of the special vehicles is ensured.
In the invention, the radio frequency positioning module positions a special vehicle, and the specific flow is as follows:
() The radio frequency signal between the radio frequency positioning module and the special vehicle realizes the non-contact information transmission through space coupling;
(2) the radio frequency positioning module is in wireless communication with the special vehicles, and the received signal strength is obtained through a collision recognition algorithm of a plurality of special vehicles, namely: an RSSI value;
(3) acquiring the coordinate value of the radio frequency positioning module, transmitting the acquired coordinate value and the RSSI value to a background control center, and obtaining the position information of the special vehicle by the background control center through a positioning algorithm according to the received data information;
in the invention, the positioning algorithm is specifically as follows:
determining the relationship between the received signal strength and the signal transmission distance as follows:
RSSI＝-(A+10n log10D)-EAF；
wherein, RSSI is received signal strength, D is distance between nodes, and n is signal propagation factor; EAF is an environmental factor;
the reader-writer is arranged at three positions: p1(x1, y1), p2(x2, y2) and p1(x3, y3), and the coordinates of the special vehicle to be positioned are calculated by the following formula:
and obtaining the coordinate position of the special vehicle as follows:
when the system is in operation, the vehicle detector detects passing vehicles according to the fixed frequency, when special vehicles needing to be preferentially passed are detected, the wireless communication module transmits signals to the background control center, the signals are received by the background control center and then are subjected to background calculation to obtain information such as the position and the speed of the special vehicles, corresponding intelligent signal lamps are controlled to carry out state fast switching, and the preferential passing of the special vehicles is ensured.
Drawings
FIG. 1 is a system architecture diagram of the present invention.
Fig. 2 is a plan view of a priority traffic control scheme for special vehicles.
FIG. 3 is a representative example flow diagram.
Detailed Description
The system of the present invention will be further described with reference to specific examples.
The system background administrator configures a priority traffic rule of the special vehicle priority traffic control system in advance according to the following precondition:
priority traffic rules (configured according to rule weights, such as ambulance first, fire second, police third, and other vehicles set as normal vehicles);
various congestion rule management (according to congestion conditions, a priority traffic rule is dynamically configured, if the congestion condition is extreme, the priority traffic rule of a specific vehicle is set to be invalid, and the specific vehicle can preferentially pass under the general congestion and non-congestion states);
managing the scheduled route of the special vehicle (predicting the route which the special vehicle may pass through in advance according to the current position of the special vehicle obtained by the positioning terminal, and setting the crossing traffic light in green state in advance to avoid congestion if necessary)
(1) And when the background administrator configures the system, the ambulance is set to the highest passing priority. If an ambulance passes through a route with a high-precision positioning terminal, the radio frequency positioning module is in wireless communication with the special vehicles, and the received signal strength is obtained through a collision recognition algorithm of the special vehicles, namely: an RSSI value;
(2) the positioning module uploads the information (position, type, speed and the like) of the special vehicle to a background system in a wireless transmission mode and sends a priority passing request;
(3) the background system identifies the position, type, speed and other information (signal state evaluation) of the vehicle, and determines the vehicle as a vehicle to pass preferentially according to the passing rule set in the step (1);
(4) the background system carries out big data analysis according to each positioning terminal arranged on two sides of a road, and predicts the congestion condition (traffic state evaluation) of the expected passing road of the ambulance;
(5) the background system evaluates the situation that the ambulance forecasts the congestion of the passing road as general congestion, and the ambulance meets the priority passing rule according to the configuration rule;
(6) the background system issues an instruction to the traffic lights, and the traffic vehicles passing through the intersection in front of the special vehicle are set to be green in advance;
(7) the special vehicle smoothly passes through the front intersection;
(8) detecting the special vehicle again by a high-precision positioning terminal buried in front of the traffic intersection next time, and circularly executing the instruction;
(9) when the special vehicle reaches the designated position, the instruction is executed;
(10) the traffic control system circularly detects the next special vehicle passing through the road and circularly executes the instructions.
Claims (6)
1. A specific vehicle priority traffic control system based on a high-precision positioning terminal is characterized by comprising: vehicle detector, backstage control center, traffic intelligence semaphore, wherein: the vehicle detector comprises a radio frequency positioning module: the special vehicles which need to be preferentially passed are arranged with the radio frequency label identification devices on the vehicles in advance at the positions 50m-100m in front of the intelligent traffic signal lamps; when the special vehicle passes through the vehicle detector, the detector can quickly identify the special vehicle and transmit information back to the background control center in real time through the wireless transmission equipment;
the background control center: the set of traffic signal control system core device comprises the following functional modules:
(1) collecting road real-time data and special vehicle real-time data: the intelligent signal machine carries out signal interaction with each intelligent signal machine in real time, and the states of each special vehicle in the driving process and the states of traffic lights of the routes where the special vehicles drive are known and used as the precondition for making decisions for a traffic signal control system;
(2) support priority traffic vehicle information creation and priority vehicle service creation: creating priority traffic vehicle information, wherein the priority traffic vehicle information comprises adding and recording special vehicle information meeting requirements by a system platform, and the special vehicle information comprises vehicle license plates and the like; establishing a priority vehicle service, including registering priority passing license plate information, passing intersections and service time;
(3) calculating system performance optimization, namely taking charge of system performance index function calculation according to the acquired traffic state information, signal state information and special vehicle information and a special vehicle priority algorithm, predicting and calculating special vehicle delay, intersection saturation and the like according to an adopted signal implementation strategy, determining the weight of each performance index, calculating the comprehensive performance index of the system, and providing a basis for adjusting the signal control state of an intersection or a road network;
(4) and (3) managing the prior passing vehicle information: the method comprises the steps that vehicle priority traffic conditions are managed according to priority traffic service established by a system platform, all priority traffic vehicle data lists are recorded, special vehicles are identified through vehicle-side equipment and road-side equipment, vehicle numbers, priority strategies, position information, driving directions, priority traffic intersections and priority traffic time are analyzed, and vehicles with the priority traffic service can be monitored;
(5) and (3) management of priority traffic parameters: analyzing the current intersection traffic flow state and the influence degree of traffic flow in different directions of the intersection on a priority traffic decision according to the information reported by the road side equipment, configuring different traffic parameter information in a system background, filling in strategy selection, setting a priority traffic distance parameter, prolonging the setting of a green light, and sensing the state of a signal lamp;
(6) and (3) managing a priority traffic policy: the system background can add different priority traffic policies, such as: the green light is prolonged, the green light starts early, the jump phase and other priority passing strategies are adopted, various priority passing schemes are provided, and strategy selection is provided for realizing the priority passing of the vehicles; after the system receives the priority request, according to the vehicle information provided by the system, the traffic running states of the intersection or the road network, such as the current queuing length of the intersection or the road network, the number of arriving vehicles during the priority implementing period, the number of driving-away vehicles in the time range and the like, are evaluated;
(7) history priority service playback: the passing data of all vehicles passing preferentially are recorded through the vehicle side or the in-vehicle equipment, and the playback information of the vehicles passing preferentially can be inquired;
(8) priority traffic service record: recording service data of all vehicles passing preferentially, recording success or failure of vehicle service states, checking service failure details, and inquiring a passing service record according to the intersection and the license plate number;
(9) and (4) decision output: according to the decision made by the obtained various data, guiding and controlling the intelligent annunciator to make signal changes, including green light extension, green light early starting or jump phase;
the intelligent annunciator is used as an actuating mechanism of a traffic signal control system, performs data interaction with a vehicle detector, judges whether priority requirements of priority passing are met or not, sends the priority passing requests to a background control center when the priority requirements are met, and enables special vehicles meeting the priority levels to pass through a traffic intersection smoothly and quickly.
2. The system for controlling preferential traffic of specific vehicles based on the high-precision positioning terminal as claimed in claim 1, wherein the radio frequency positioning module comprises: the system comprises a controller, a transceiver and a field storage computing unit; the controller is respectively connected with the transceiver and the field storage computing unit.
3. The system for controlling the priority traffic of the specific vehicles based on the high-precision positioning terminal is characterized by further comprising a wireless communication module, wherein the wireless communication module is connected with the remote control terminal; the remote control terminal can control the traffic light color switching of the intelligent signal machine by sending a remote control command.
4. The special vehicle priority traffic control system based on the high-precision positioning terminal as claimed in claim 3, wherein when the system is in operation, the vehicle detector detects passing vehicles according to a fixed frequency, when special vehicles needing to be preferentially passed are detected, the signal is transmitted to the background control center through the wireless communication module, after the signal is received by the background control center, the information such as the position and the speed of the special vehicles is obtained through background calculation, and the corresponding intelligent signal lamps are controlled to rapidly switch states, so that the preferential passing of the special vehicles is ensured.
5. The system for controlling the preferential traffic of the specific vehicle based on the high-precision positioning terminal as claimed in claim 3, wherein the radio frequency positioning module positions the specific vehicle by a specific flow:
(1) the radio frequency signal between the radio frequency positioning module and the special vehicle realizes space coupling through the wireless transmission module to carry out contactless information transmission;
(2) the radio frequency positioning module is in wireless communication with the special vehicles, and the received signal strength is obtained through a collision recognition algorithm of a plurality of special vehicles, namely: an RSSI value;
(3) and acquiring the coordinate value of the radio frequency positioning module, transmitting the acquired coordinate value and the RSSI value to a background control center, and obtaining the position information of the special vehicle by the background control center through a positioning algorithm according to the received data information.
6. The system for controlling the priority traffic of the specific vehicle based on the high-precision positioning terminal as claimed in claim 5, wherein the positioning algorithm is as follows:
(1) determining the relationship between the received signal strength and the signal transmission distance as follows:
RSSI＝-(A+10n log10D)-EAF；
wherein, RSSI is received signal strength, D is distance between nodes, and n is signal propagation factor; EAF is an environmental factor;
(2) the reader-writer is arranged at three positions: p1(x1, y1), p2(x2, y2) and p1(x3, y3), and the coordinates of the special vehicle to be positioned are calculated by the following formulas:
and obtaining the coordinate position of the special vehicle as follows:
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Cited By (11)
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| CN113256998A (en) * | 2021-05-18 | 2021-08-13 | 哈尔滨翼成科技有限公司 | Special vehicle and working state identification method and equipment thereof |
| CN113299029A (en) * | 2021-05-14 | 2021-08-24 | 大旗时代（天津）科技有限公司 | Wisdom fire control remote monitering system |
| CN113325791A (en) * | 2021-06-08 | 2021-08-31 | 杭州富阳力佳电机有限公司 | Door opening machine control method and device and electronic equipment |
| CN113643534A (en) * | 2021-07-29 | 2021-11-12 | 北京万集科技股份有限公司 | Traffic control method and equipment |
| CN113781805A (en) * | 2021-09-10 | 2021-12-10 | 淮阴工学院 | Traffic light control system and control method for preferential passing of special vehicle |
| CN114566059A (en) * | 2022-01-14 | 2022-05-31 | 浙江中控信息产业股份有限公司 | One-key navigation special vehicle collaborative priority system |
| CN114582114A (en) * | 2022-02-18 | 2022-06-03 | 广州华生信息科技有限公司 | Fire-fighting vehicle priority passing system based on Internet of things, control method, computer-readable storage medium and terminal |
| CN114613126A (en) * | 2022-01-28 | 2022-06-10 | 浙江中控信息产业股份有限公司 | Special vehicle signal priority method based on dynamic green wave |
| CN115798231A (en) * | 2022-10-17 | 2023-03-14 | 浪潮思科网络科技有限公司 | Traffic signal lamp control method, equipment and medium |
| CN116639169A (en) * | 2023-07-27 | 2023-08-25 | 北京全路通信信号研究设计院集团有限公司 | Intersection priority control method and intersection priority application level setting method |
| CN117789494A (en) * | 2024-02-26 | 2024-03-29 | 长春师范大学 | Data interaction method and system based on Internet of vehicles |
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| CN114582114A (en) * | 2022-02-18 | 2022-06-03 | 广州华生信息科技有限公司 | Fire-fighting vehicle priority passing system based on Internet of things, control method, computer-readable storage medium and terminal |
| CN115798231A (en) * | 2022-10-17 | 2023-03-14 | 浪潮思科网络科技有限公司 | Traffic signal lamp control method, equipment and medium |
| CN116639169A (en) * | 2023-07-27 | 2023-08-25 | 北京全路通信信号研究设计院集团有限公司 | Intersection priority control method and intersection priority application level setting method |
| CN116639169B (en) * | 2023-07-27 | 2023-10-17 | 北京全路通信信号研究设计院集团有限公司 | Intersection priority control method and intersection priority application level setting method |
| CN117789494A (en) * | 2024-02-26 | 2024-03-29 | 长春师范大学 | Data interaction method and system based on Internet of vehicles |
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Application publication date: 20210326 |