Intelligent traffic signal lamp control system

Abstract

The invention relates to an intelligent traffic signal lamp control system, which comprises an inductive control module, a self-adaptive control module and an intersection blockage identification module, the induction control module adopts single-point control induction control and is used for analyzing vehicle feedback data information at the intersection. According to the intelligent traffic signal lamp control system, based on real-time traffic flow information, a sensor, a camera or other data sources are used for detecting traffic flow conditions in all directions of an intersection. The data can be transmitted to a road condition information management database for analysis and processing. According to traffic flow in different directions and actual road conditions, the system automatically adjusts traffic light time in each direction, and traffic pressure is reduced.

Description

Technical Field

[0001] The present invention relates to the field of intelligent traffic technology, and in particular to an intelligent traffic signal light control system. Background Art

[0002] Traffic lights are lights that direct traffic, also known as traffic lights, which consist of red, green, and yellow lights. Red lights mean no passage, green lights mean passage is allowed, and yellow lights mean warning. The time that the three colors of indicator lights are on is not set randomly. Reasonable setting of the time of each indicator light can effectively guide traffic flow, improve road capacity, and reduce traffic accidents.

[0003] In urban traffic, although traffic lights have signal control systems, the switching frequency of traffic lights can only be allocated according to time, and the traffic light time cannot be reasonably allocated according to the vehicle situation. For example, at a certain intersection, during a certain time period, there are no vehicles in the north-south direction, and the light is still green, while there are many vehicles in the east-west direction. During the green light time, only a part of the vehicles can go, so the east-west direction will only become more and more congested, the traffic rate of the road will be greatly reduced, and the waiting time of motor vehicles will be extended. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In order to solve the above technical problems, the present invention provides a traffic intelligent signal light control system.

[0006] (II) Technical solution

[0007] Based on this, the present invention provides the following technical solutions: a traffic intelligent signal light control system, including a sensing control module, an adaptive control module, and an intersection congestion recognition module;

[0008] The sensing control module adopts single-point control sensing control to analyze the feedback data information of vehicles at the intersection;

[0009] The adaptive control module is used for joint adjustment and control of a plurality of single-point control sensing controls;

[0010] The intersection congestion identification module is used to evaluate the traffic conditions at the intersection;

[0011] The sensing control module includes a traffic light, a signal light control unit, a traffic control center control unit, a network communication unit, a traffic flow signal unit, a GPS navigation data service unit, and a GPS unit. The network communication unit is used to establish a communication connection between the traffic flow signal unit and the GPS navigation data service unit, and the traffic control center control unit establishes a communication connection with the network communication unit.

[0012] The signal light control unit establishes a communication connection with the traffic control center control unit. The signal light control unit is used to control the traffic light. The signal light control unit is connected to the GPS unit.

[0013] Preferably, the adaptive control module includes the following operations:

[0014] On the road, the traffic flow signal unit first detects whether there is an unexpected situation that requires human intervention. If necessary, the signal light control unit detects whether the green light has ended;

[0015] If the green light ends, the green light of the traffic light in the current direction is changed to yellow through the signal light control unit, and the red light of the traffic light in the next direction remains red;

[0016] Then the traffic flow signal unit continues to determine whether the intersection is congested. If the intersection is not congested, the signal light control unit controls the yellow light of the current direction traffic light to change to red light, and the red light of the next direction traffic light to change to green light;

[0017] If the route is congested, all four directions of the road are set to red lights, and then the situation of vehicles at the intersection is determined again. If the vehicles are not cleared, the above operation is repeated to set all four directions to red lights;

[0018] If the vehicle condition permits, the red light in the current direction will remain red, and the red light in the next direction will switch to green.

[0019] Preferably, the intersection congestion identification module includes a camera, an access switch, the Internet, a computer processing center, and a road condition information management database. The camera is connected to the Internet via the access switch, the Internet establishes a data connection with the computer processing center, and the computer processing center establishes a data connection with the road condition information management database.

[0020] Preferably, the camera is a traffic recognition camera, which is used to recognize images of vehicle lights and determine whether the intersection is congested.

[0021] Preferably, the method for determining whether the intersection is congested is as follows:

[0022] Vehicle speed>V 1 , occupancy rate>S 1 , no congestion;

[0023] Vehicle speed<V 1 , occupancy rate>S 1 , congestion;

[0024] Vehicle speed<V 1 , occupancy rate<S 1 , no congestion;

[0025] Vehicle speed>V1 , occupancy rate<S 1 , no congestion;

[0026] The intersection speed threshold is set to V 1 , the intersection occupancy threshold is set to S 1 .Two parameters, vehicle speed and vehicle occupancy rate at the intersection, are used to comprehensively evaluate whether the flat intersection is in a congested state.

[0027] Preferably, the intersection congestion identification module includes the following operations:

[0028] First, the camera identifies the direction of the vehicle and determines whether the vehicle's speed is greater than 5 km;

[0029] If yes, the duration of the traffic light will not be controlled. If no, the duration of the traffic light will be controlled and the green light in the direction of traffic will be extended to 120s.

[0030] And determine again whether the vehicle's speed is greater than 5km, repeat the above operation until the process is restored.

[0031] (III) Beneficial effects

[0032] Compared with the prior art, the present invention provides a traffic intelligent signal light control system with the following features:

[0033] Beneficial effects:

[0034] This intelligent traffic light control system uses sensors, cameras or other data sources to detect traffic conditions in all directions of the intersection based on real-time traffic flow information. These data will be transmitted to the road condition information management database for analysis and processing. According to the traffic flow in different directions and the actual road conditions, the system automatically adjusts the traffic light time in each direction to reduce traffic pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of the sensing control module of the present invention;

[0036] Figure 2 This is a schematic diagram of the operation of the adaptive control module of the present invention;

[0037] Figure 3 This is a schematic diagram of the structure of the intersection congestion identification module of the present invention;

[0038] Figure 4 This is a schematic diagram of the operation of the intersection congestion identification module of the present invention. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] See also Figure 1 -Figure, a traffic intelligent signal light control system, specifically including the following embodiments:

[0041] A traffic intelligent signal light control system, comprising a sensing control module, an adaptive control module, and an intersection congestion recognition module; the sensing control module adopts single-point control sensing control, and is used to analyze vehicle feedback data information at intersections; the adaptive control module is used to coordinate and control multiple single-point control sensing controls; the intersection congestion recognition module is used to evaluate the traffic conditions at intersections; the sensing control module comprises a traffic light, a signal light control unit, a traffic control center control unit, a network communication unit, a traffic flow signal unit, a GPS navigation data service unit, and a GPS unit, the network communication unit is used to establish a communication connection between the traffic flow signal unit and the GPS navigation data service unit, and the traffic control center control unit establishes a communication connection with the network communication unit; the signal light control unit establishes a communication connection with the traffic control center control unit, the signal light control unit is used to control the traffic light, and the signal light control unit is connected to the GPS unit. The conditions of vehicles on the road are uncertain and change every moment. If the traffic system is regarded as an uncertain system, its state can be continuously measured, such as traffic flow, number of stops, delay time, queue length, etc., these variables can be analyzed, their changing characteristics can be mastered, and compared with the ideal dynamic characteristics, and the difference can be used to change the adjustable parameters of the system or generate a control, so as to ensure that no matter how the environment changes, the control effect can reach the optimal or suboptimal control. Adaptive control is a control method that combines multiple single-point control sensing controls. For example, if congestion occurs in a certain direction of an intersection, the system detects that the number of vehicles in the congested direction increases and the traffic is slow, and it will immediately send a coordination control signal to the surrounding intersections, so that the system can appropriately extend the red light time leading to the upstream of the congested intersection, and then extend the green light time in the evacuation direction of the congested intersection. In this way, the congested intersection becomes a "slow in and fast out" mode, which is used to "reduce swelling" at the intersection.

[0042] In some embodiments, the adaptive control module includes the following operations: on the road, first, the traffic flow signal unit is used to detect whether there is an unexpected situation that requires manual intervention. If necessary, the signal light control unit is used to detect whether the green light has ended; if the green light has ended, the signal light control unit controls the green light of the traffic light in the current direction to be converted to a yellow light, and the red light of the traffic light in the next direction remains red; then the traffic flow signal unit continues to determine whether the intersection is congested. If the intersection is not congested, the signal light control unit controls the yellow light of the traffic light in the current direction to be converted to a red light, and the red light of the traffic light in the next direction to be converted to a green light; if the route is congested, all four directions of the road are set to red lights, and then the situation of vehicles at the intersection is determined again. If the vehicles are not cleared, the above operations are repeated to set all four directions to red lights; if there is a situation with the vehicle, the red light in the current direction continues to remain, and the red light in the next direction is switched to a green light.

[0043] In the present application, the intersection congestion identification module includes a camera, an access switch, the Internet, a computer processing center, and a road condition information management database. The camera is connected to the Internet via the access switch, the Internet establishes a data connection with the computer processing center, and the computer processing center establishes a data connection with the road condition information management database. The camera is a traffic flow recognition camera, which is used to recognize the image of the car lights and determine whether the intersection is congested. The method for determining whether the intersection is congested is as follows:

[0044] Vehicle speed>V 1 , occupancy rate>S 1 , no congestion;

[0045] Vehicle speed<V 1 , occupancy rate>S 1 , congestion;

[0046] Vehicle speed<V 1 , occupancy rate<S 1 , no congestion;

[0047] Vehicle speed>V 1 , occupancy rate<S 1 , no congestion;

[0048] The traffic conditions at the intersection are evaluated by using the vehicle speed and the space occupancy rate of the vehicle. The speed detection algorithm focuses on the changes of vehicles in the area of ​​interest, so the calculation is small: since the image brightness of the headlights is large and symmetrical, the accuracy of detecting vehicles by detecting the headlights is high, and it is convenient to correct the video angle. Combined with the proportion of the area of ​​the vehicle at the intersection in the entire intersection, it can more accurately determine whether the intersection is congested. Since the design service level of each road is different, the same speed on the expressway and the ordinary road will bring completely different driving experiences to the driver. Among them, the intersection speed threshold is set to V 1, the intersection occupancy threshold is set to S 1 . The vehicle speed and the vehicle occupancy rate at the intersection are used to comprehensively evaluate whether the intersection is in a congested state. When the vehicle speed is fast (greater than V 1 ), a high occupancy rate means that many vehicles pass through the intersection quickly, and a low occupancy rate means that a few vehicles pass through the intersection at a relatively fast speed. In these two cases, since the average speed is relatively fast, the intersection is smooth and there is no need to intervene in the operation time of multi-directional red lights; when the speed is relatively slow and the occupancy rate of vehicles at the intersection is relatively large (greater than S 1 ), it means that a large number of vehicles are congested at the intersection and need to be cleared in time; when the vehicle speed is low and the occupancy rate is small, it means that there are fewer vehicles driving at a low speed at the intersection. This situation is called slow driving. Since the intersection is not congested, vehicles can use the yellow light buffer time to drive out of the intersection, so there is no need to clear them. The key to timely clearing vehicles at the intersection is to accurately and quickly judge the speed of the intersection and the space occupancy rate of vehicles at the intersection.

[0049] In some embodiments, the intersection congestion identification module includes the following operations: first, the camera identifies the driving direction and determines whether the vehicle speed is greater than 5km; if so, the duration of the traffic light is not controlled, if not, the duration of the traffic light is controlled, and the green light in the direction of travel is extended to 120s; and again determine whether the vehicle speed is greater than 5km, repeat the above operations until the process is restored, and the traffic lights change at any time as the traffic information changes, reducing traffic pressure.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A traffic intelligent signal light control system, characterized by: It includes a sensing control module, an adaptive control module, and an intersection congestion recognition module; The sensing control module adopts single-point control sensing control to analyze the feedback data information of vehicles at the intersection; The adaptive control module is used for joint adjustment and control of a plurality of single-point control sensing controls; The intersection congestion identification module is used to evaluate the traffic conditions at the intersection; The sensing control module includes a traffic light, a signal light control unit, a traffic control center control unit, a network communication unit, a traffic flow signal unit, a GPS navigation data service unit, and a GPS unit. The network communication unit is used to establish a communication connection between the traffic flow signal unit and the GPS navigation data service unit, and the traffic control center control unit establishes a communication connection with the network communication unit. The signal light control unit establishes a communication connection with the traffic control center control unit. The signal light control unit is used to control the traffic light. The signal light control unit is connected to the GPS unit.

2. The intelligent traffic signal light control system according to claim 1 is characterized in that: The adaptive control module includes the following operations: On the road, the traffic flow signal unit first detects whether there is an unexpected situation that requires human intervention. If necessary, the signal light control unit detects whether the green light has ended; If the green light ends, the green light of the traffic light in the current direction is changed to yellow through the signal light control unit, and the red light of the traffic light in the next direction remains red; Then the traffic flow signal unit continues to determine whether the intersection is congested. If the intersection is not congested, the signal light control unit controls the yellow light of the current direction traffic light to change to red light, and the red light of the next direction traffic light to change to green light; If the route is congested, all four directions of the road are set to red lights, and then the situation of vehicles at the intersection is determined again. If the vehicles are not cleared, the above operation is repeated to set all four directions to red lights; If the vehicle condition permits, the red light in the current direction will remain red, and the red light in the next direction will switch to green.

3. The intelligent traffic signal light control system according to claim 1 is characterized in that: The intersection congestion identification module includes a camera, an access switch, the Internet, a computer processing center, and a road condition information management database. The camera is connected to the Internet via the access switch, the Internet establishes a data connection with the computer processing center, and the computer processing center establishes a data connection with the road condition information management database.

4. The intelligent traffic signal light control system according to claim 3 is characterized in that: The camera is a traffic recognition camera, which is used to recognize images of vehicle lights and determine whether the intersection is congested.

5. The intelligent traffic signal light control system according to claim 4 is characterized in that: The method for determining whether the intersection is congested is as follows: Vehicle speed>V1, occupancy>S1, no congestion; Vehicle speed < V1, occupancy > S1, congestion; Vehicle speed < V1, occupancy < S1, no congestion; Vehicle speed>V1, occupancy rate<S1, no congestion; Among them, the intersection speed threshold is set to V1, and the intersection occupancy threshold is set to S1. The two parameters of vehicle speed and vehicle occupancy at the intersection are used to comprehensively evaluate whether the flat intersection is in a congested state.

6. The intelligent traffic signal light control system according to claim 3 is characterized in that: The intersection congestion identification module includes the following operations: First, the camera identifies the direction of the vehicle and determines whether the vehicle's speed is greater than 5 km; If yes, the duration of the traffic light will not be controlled. If no, the duration of the traffic light will be controlled and the green light in the direction of traffic will be extended to 120s. And determine again whether the vehicle's speed is greater than 5km, repeat the above operation until the process is restored.

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