CN113362617A - Traffic light control system based on CLY Point1 algorithm - Google Patents
Traffic light control system based on CLY Point1 algorithm Download PDFInfo
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- CN113362617A CN113362617A CN202110618283.6A CN202110618283A CN113362617A CN 113362617 A CN113362617 A CN 113362617A CN 202110618283 A CN202110618283 A CN 202110618283A CN 113362617 A CN113362617 A CN 113362617A
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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
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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
- G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors
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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
- G08G1/08—Controlling traffic signals according to detected number or speed of vehicles
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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
- G08G1/081—Plural intersections under common control
- G08G1/083—Controlling the allocation of time between phases of a cycle
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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
Abstract
The invention discloses a traffic signal lamp control system based on a CLY Point1 algorithm, which comprises a central management module, a network transmission module and an area control module; the next stage of the area control module is provided with a traffic signal control module; the traffic signal control module is provided with a pedestrian real-time feedback and strain module and a signal lamp intelligent strain module; the traffic signal control module comprises an intervention control module, a parameter configuration module, a parameter read-write module, a state monitoring module, an algorithm processing module and a safety verification module, wherein the algorithm processing module is positioned at the next stage of the safety verification module. The algorithm processing module adopts a CLY Point1 algorithm to control the traffic signals. According to the invention, through temporarily controlling the working mode of the traffic signal lamp group, the red lamp is changed into the green lamp after flashing for several seconds, so that the pedestrian in an emergency can conveniently pass through the traffic light intersection, the working mode of the traffic signal lamp is more humanized, and convenience is provided for the pedestrian to pass through.
Description
Technical Field
The invention relates to a traffic light control system in the field of road traffic, in particular to a traffic light control system based on a CLY Point1 algorithm.
Background
The traffic signal control system is a regional traffic signal real-time networking control system integrating modern computers, communication and control technologies, can realize real-time control of intersection traffic signals, regional coordination control, central and local optimization control, real-time inquiry and monitoring of intersection states, and has the functions of fault location of intersection signal lamps, real-time uploading and downloading of timing schemes, recording and management of operation logs, remote login control of multiple users and authority management.
The traffic signal lamp is a signal lamp for commanding traffic operation and consists of a red lamp, a green lamp and a yellow lamp, wherein the red lamp represents no passing, the green lamp represents passing, the yellow lamp represents warning, and the traffic signal lamp is divided into: motor vehicle signal lamps, non-motor vehicle signal lamps, pedestrian crossing signal lamps, direction indicator lamps, namely arrow signal lamps, lane signal lamps, flashing warning signal lamps and signal lamps at crossing road junctions of roads and railways.
The current working change modes of the intersection traffic signal lamp are divided into two modes, one mode is that a traffic police manually adjusts a traffic signal control module according to the intersection congestion condition; the other mode is a time interval working mode of the traffic signal lamp which is set in advance, one day is divided into a plurality of time intervals, the indication mode of the traffic signal lamp and the reading time of the traffic signal lamp in each time interval are different, but the mode needs to wait for the adjusted time interval to enable the traffic signal lamp to automatically change the indication mode.
The two modes have great limitations, particularly, the road traffic condition is changed all the time, and a traffic police can not command traffic at a specific intersection all the time, so that the two modes can not be subjected to real-time response according to the intersection condition.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a traffic light control system based on a CLY Point1 algorithm, which overcomes the defect that in the two modes of changing traffic lights in the background technology, the traffic police manually changes the traffic lights which are required to be directed at an intersection, and the time-interval working mode of the traffic lights which are set in advance changes the traffic light indication mode and the time only at the set time, so that the real-time strain can not be realized according to the intersection condition.
The technical scheme is as follows: the traffic signal lamp control system based on the CLY Point1 algorithm comprises a central management module, a network transmission module and an area control module, wherein the area control module is in communication connection with the central management module through the network transmission module;
the next stage of the area control module is provided with a traffic signal control module, and the area control module is connected with the traffic signal control module through a local area communication module;
the traffic signal control module is provided with a pedestrian real-time feedback and strain module and a signal lamp intelligent strain module;
the next stage of the traffic signal control module is provided with a traffic signal lamp group, a video monitoring module and a violation monitoring module; the next level of traffic signal banks, video monitoring module and monitoring module violating regulations is provided with real-time storage transmission module, and real-time storage transmission module passes through local communication module and is connected with regional control module.
The traffic signal control module comprises an intervention control module, a parameter configuration module, a parameter reading and writing module, a state monitoring module, an algorithm processing module and a safety verification module;
the next stage of the safety verification module is provided with an algorithm processing module, the next stage of the algorithm processing module is provided with a parameter reading and writing module, and the next stage of the parameter reading and writing module is provided with a parameter configuration module.
The safety verification module is provided with a state monitoring module and an intervention control module; the state monitoring module is connected with the safety verification module and the parameter reading and writing module, and the intervention control module is connected with the safety verification module.
The regional control module controls a plurality of traffic signal control modules in one region in real time through the local communication module; the area control module controls the specific working mode of each traffic signal lamp group in the area through the local area communication module and the traffic signal control module.
The algorithm processing module adopts a CLY Point1 algorithm to control the traffic signals, and the algorithm is realized by the following steps:
(1) arranging real-time timing of each phase, firstly giving first phase pre-timing, and then estimating the number of arriving vehicles and pedestrians of the phase; giving the time when the next phase starts passing, then giving weight of sigma and delta to control the timing of the current phase, and passing through TminAnd TmaxObtaining an optimized timing t of the current phase;
(2) and counting and predicting the number of the retained vehicles and pedestrians in the period and the number of the vehicles and pedestrians in the period of each phase, further calculating the sum of delay time of all vehicles and pedestrians in the period, and providing initial data for the next period.
The pedestrian real-time feedback and strain module comprises a power switch mechanism, a voice communication mechanism, a camera monitoring mechanism and a real-time video storage and transmission mechanism, wherein the voice communication mechanism is in communication connection with the central management module through a network transmission module, and the voice communication mechanism is in communication connection with the regional control module through a local communication module.
The video monitoring module and the violation monitoring module both adopt high-definition cameras to carry out picture shooting and recording and photographing monitoring.
The traffic signal control module is arranged on the roadbed at one side of the traffic signal lamp group.
The traffic signal control module controls the working modes of the traffic signal lamp bank, the video monitoring module and the violation monitoring module in real time in a physical control mode and a remote wireless control mode.
The traffic signal control module temporarily controls the working mode of the traffic signal light group, so that the red light is changed into the green light after flickering for several seconds.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) when the traffic signal lamp control system works, when a pedestrian needs to pass through a traffic light under an emergency condition and the traffic light is just in a red light state, the pedestrian presses a button on the pedestrian real-time feedback and strain module, the pedestrian real-time feedback and strain module is in contact with an administrator of the area control module or the central management module through a wireless network, the administrator judges the emergency condition met by the pedestrian, the administrator remotely controls the traffic signal control module through the communication module after the judgment, the traffic signal control module temporarily controls the working mode of the traffic signal lamp group, the red light is changed into a green light after flashing for several seconds, the pedestrian meeting the emergency condition can pass through the traffic light intersection emergently, the working mode of the traffic signal lamp is more humanized, and convenience is provided for the pedestrian to pass through.
(2) When the traffic signal lamp group controls the crossing to pass through too large flow, the traffic police temporarily changes the traffic light mode of the traffic signal lamp group by manually controlling the traffic signal control module, thereby achieving the purpose of real-time drainage and dredging.
Drawings
FIG. 1 is a schematic structural diagram of a traffic signal lamp control system based on a CLY Point1 algorithm according to the present invention;
FIG. 2 is a schematic view of the operation of the traffic signal control module according to the present invention;
FIG. 3 is a schematic diagram of a control flow of a traffic signal control module according to the present invention.
Detailed Description
As shown in fig. 1 to fig. 3, the traffic light control system based on CLY Point1 algorithm of the present invention includes a central management module 1, a network transmission module 2 and an area control module 3, wherein the area control module 3 is installed at the next stage of the central management module 1, and the area control module 3 is in communication connection with the central management module 1 through the network transmission module 2.
The traffic signal control module 6 is arranged at the next stage of the area control module 3, and the area control module 3 and the traffic signal control module 6 are in communication connection through the local area communication module 4. And a pedestrian real-time feedback and strain module 5 and a signal lamp intelligent strain module 17 are arranged on one side of the traffic signal control module 6. The next level of traffic signal control module 6 is provided with traffic signal lamp group 7, video monitoring module 8 and monitoring module 9 violating the regulations, and traffic signal control module 6 and traffic signal lamp group 7 are the one-to-one setting, and traffic signal control module 6 is when controlling traffic signal lamp group 7 real time control video monitoring module 8 and monitoring module 9 violating the regulations working condition again.
The real-time storage and transmission module 10 is arranged at the next stage of the traffic signal lamp group 7, the video monitoring module 8 and the violation monitoring module 9, and the video monitoring module 8 and the violation monitoring module 9 are used for picture shooting and monitoring by adopting high-definition cameras; the video monitoring module 8 and the violation monitoring module 9 both adopt LED light supplement lamps for shooting and recording light supplement.
The picture videos shot by the video monitoring module 8 and the violation monitoring module 9 are transmitted to the area control module 3 through the real-time storage and transmission module 10, and the area control module 3 summarizes, sorts and transmits the shot picture videos to the central management module 1 for storage.
The real-time storage transmission module 10 is in communication connection with the area control module 3 through the local area communication module 4, and the area control module 3 controls a plurality of traffic signal control modules 6 in one area in real time through the local area communication module 4; meanwhile, the area control module 3 controls the specific operation mode of each traffic signal lamp group 7 in the area through the local area communication module 4 and the traffic signal control module 6.
The traffic signal lamp control system is divided into a control platform layer, a control center layer, a communication layer and a crossing layer, wherein the control platform layer provides interfaces with other systems and platforms, and the control center layer has the functions of management, control and monitoring and also has the functions of storing and inquiring traffic information. The communication layer adopts various interfaces to realize the communication function, and the intersection layer has the functions of control, acquisition and storage.
The pedestrian real-time feedback and strain module 5 comprises a power switch mechanism, a voice communication mechanism, a camera monitoring mechanism and a real-time video storage and transmission mechanism. The voice communication mechanism is in communication connection with the central management module 1 through the network transmission module 2, and the voice communication mechanism is in communication connection with the regional control module 3 through the local communication module 4.
When the pedestrian passes through the traffic light in an emergency and the traffic light is just in the red light state, at the moment, the pedestrian presses the button on the pedestrian real-time feedback and strain module 5, the pedestrian real-time feedback and strain module 5 is in contact with the administrator of the area control module 3 or the central management module 1 through the wireless network, namely, the pedestrian communicates with the administrator through the voice communication mechanism on the pedestrian real-time feedback and strain module 5, and informs the administrator of the emergency situation encountered by the administrator, the administrator judges the emergency situation encountered by the pedestrian, after the judgment, the administrator remotely controls the traffic signal control module 6 through the communication module, the traffic signal control module 6 controls the working mode of the traffic signal lamp group 7 temporarily, the red lamp is changed into the green lamp after twinkling for a plurality of seconds, and pedestrians encountering emergency situations can pass through the traffic light intersection conveniently.
In the traffic signal lamp control system based on the CLY Point1 algorithm, the traffic signal control module 6 comprises an intervention control module 11, a parameter configuration module 12, a parameter reading and writing module 13, a state monitoring module 14, an algorithm processing module 15 and a safety verification module 16, wherein the algorithm processing module 15 is positioned at the next stage of the safety verification module 16.
The algorithm processing module 15 comprises a single outlet, a single inlet, paired outlets and inlets, coordination of the outlets and urban intersections, and a coordination control algorithm of the inlets and the urban intersections. The goal of the coordinated control of the expressway exit and the urban intersection is to ensure that the exit ramp, vehicles and pedestrians on the auxiliary road meet the traffic demand and ensure that the queuing degree of the vehicles and the pedestrians does not block the exit ramp.
The next stage of the algorithm processing module 15 is provided with a parameter reading and writing module 13, and the next stage of the parameter reading and writing module 13 is provided with a parameter configuration module 12. The state monitoring module 14 and the intervention control module 11 are respectively arranged on two sides of the security verification module 16, the state monitoring module 14 is electrically connected with the security verification module 16 and the parameter reading and writing module 13, and the intervention control module 11 is electrically connected with the security verification module 16.
The traffic signal control module 6 has three parameters of period duration, split ratio and phase difference, and the regional coordination control algorithm of the traffic signal control module 6 implements and optimizes the three parameters to control the sub-region. The region coordination control targets of the traffic signal control module 6 are as follows: the method realizes the maximum road network traffic capacity in peak time, the minimum vehicle and pedestrian parking delay in peak time and the minimum parking times in low peak time.
In the traffic signal lamp control system based on the CLY Point1 algorithm, the algorithm processing module 15 adopts the CLY Point1 algorithm to control the traffic signal. The CLY Point1 algorithm is a real-time timing algorithm with both unfixed period and unfixed split green ratio, and aims to require the shortest waiting time of all vehicles and pedestrians at the intersection. According to the idea of duality, if the traffic intersection is kept as straight as possible to allow the vehicles and pedestrians to pass through, and the vehicles and pedestrians in each phase are arranged to circularly pass through the intersection, the waiting time of all the vehicles and pedestrians at the intersection is the shortest, and the traffic intersection is regarded as a resource. Two groups of control optimization parameters are set in the CLY-POIN1 algorithm:
1、Tminand TmaxRespectively controlling the timing of the real-time signals of the respective phases, wherein TminFor the minimum value of the real-time signal timing, TmaxIs the maximum value of the real-time signal timing. T ismaxThe value of (a) is 3-5 times of the time for a single automobile to pass through the intersection; t ismaxIs multiplied by the maximum period TTmax, i.e. T, of the phase by the flow rate distribution PP and TTmaxmax＝TTmax*PP；
2. Dirac delta function and standard deviation σ: the value of the delta function is in the interval (0, 1), and the value of the standard deviation sigma is in the interval (0, 1.5). The above parameters are the tolerance of the phase transit time, so that the initial parameters of the main links in the CLY-Point1 algorithm are reasonably arranged according to waiting vehicles and pedestrians in each phase.
In addition to the above parameters, there are the average time n for the vehicle to pass through the intersection, the number of waiting vehicles and pedestrians in each current phase, and the passing flow rate estimation amount in the following period.
The CLY-Point1 algorithm realizes the method of the invention as follows:
firstly, specifically arranging real-time timing of each phase, taking a first phase as an example, when a vehicle is waiting at present, wherein n11 represents waiting vehicles and pedestrians of a flow R11 in the first phase, and n12 represents waiting vehicles and pedestrians of a flow R31 in the first phase, firstly giving a phase preset time t ', t ' ═ n1 × u, and then estimating the number nc of arriving vehicles and pedestrians of the phase in a t ' period (still taking the maximum number of two different arriving vehicles and pedestrians); repeating the above steps until nc is 0, and then making t1 t' + t "+ …; and then considering the waiting condition of vehicles and pedestrians in the next phase, giving the expected passing time of the next phase, then giving a weight of sigma to control the timing of the current phase, considering the waiting time of vehicles and pedestrians in the current phase, giving a weight of delta to control the timing of the current phase, adding control of Tmin and Tmax, and finally synthesizing to obtain an optimized timing t of the current phase.
Secondly, counting and predicting the number of the retained vehicles and pedestrians in the period and the number of the new vehicles and pedestrians in the period of each phase, further calculating the delay time of all vehicles and pedestrians in the period and providing initial data for the next period, and simulating the specific process of traffic police for commanding traffic at a traffic intersection through the CLY-Point1 algorithm.
The traffic signal lamp control process of the invention is as follows:
firstly, when a pedestrian passes through a traffic light under an emergency condition and the traffic light is in a red light state, the pedestrian presses a button on the pedestrian real-time feedback and strain module 5, the pedestrian real-time feedback and strain module 5 is in contact with an administrator of the area control module 3 or the central management module 1 through a wireless network, and the pedestrian communicates with the administrator through a voice communication mechanism on the pedestrian real-time feedback and strain module 5 and informs the administrator of the emergency condition;
the administrator then judges the emergency that the pedestrian met, and the long-range communication module of passing through of administrator control traffic signal control module 6 after judging, and traffic signal control module 6 controls traffic signal lamp group's mode temporarily for the red light becomes the green light after twinkling several seconds, and the pedestrian that meets emergency passes through the traffic lights crossing, makes the working method of traffic signal lamp more humanized like this.
After the whole traffic signal lamp control system based on the CLY Point1 algorithm is laid, the traffic signal control module 6 is installed on a roadbed at one side of a traffic signal lamp group 7, and the traffic signal control module 6 controls the working modes of the traffic signal lamp group 7, the video monitoring module 8 and the violation monitoring module 9 in real time in a physical control mode and a remote wireless control mode.
The central management module 1 and the regional control module 3 both control the traffic signal control module 6 in a remote control mode, so that the working mode of the traffic signal lamp group 7 is remotely controlled.
When the traffic light group 7 controls the crossing to pass through too large flow, the traffic police temporarily changes the traffic light mode of the traffic light group 7 by manually controlling the traffic signal control module 6, thereby achieving the purpose of real-time drainage and dredging.
Claims (10)
1. A traffic signal lamp control system based on CLY Point1 algorithm is characterized in that: the control system comprises a central management module (1), a network transmission module (2) and a regional control module (3), wherein the regional control module (3) is in communication connection with the central management module (1) through the network transmission module (2);
a traffic signal control module (6) is arranged at the next stage of the area control module (3), and the area control module (3) is connected with the traffic signal control module (6) through a local area communication module (4);
the traffic signal control module (6) is provided with a pedestrian real-time feedback and strain module (5) and a signal lamp intelligent strain module (17);
the next stage of the traffic signal control module (6) is provided with a traffic signal lamp group (7), a video monitoring module (8) and a violation monitoring module (9); the traffic signal lamp group (7), the video monitoring module (8) and the violation monitoring module (9) are provided with a real-time storage transmission module (10) at the next stage, and the real-time storage transmission module (10) is connected with the area control module (3) through the local communication module (4).
2. The traffic signal control system based on CLY Point1 algorithm according to claim 1, wherein: the traffic signal control module (6) comprises an intervention control module (11), a parameter configuration module (12), a parameter reading and writing module (13), a state monitoring module (14), an algorithm processing module (15) and a safety verification module (16);
an algorithm processing module (15) is arranged at the next stage of the safety verification module (16), a parameter reading and writing module (13) is arranged at the next stage of the algorithm processing module (15), and a parameter configuration module (12) is arranged at the next stage of the parameter reading and writing module (13).
3. The traffic signal control system based on CLY Point1 algorithm according to claim 2, wherein: a state monitoring module (14) and an intervention control module (11) are arranged on the safety verification module (16); the state monitoring module (14) is connected with the security verification module (16) and the parameter reading and writing module (13), and the intervention control module (11) is connected with the security verification module (16).
4. The traffic signal control system based on CLY Point1 algorithm according to claim 1, wherein: the area control module (3) controls a plurality of traffic signal control modules (6) in an area in real time through the local area communication module (4); the area control module (3) controls the specific working mode of each traffic signal lamp group (7) in the area through the local area communication module (4) and the traffic signal control module (6).
5. The traffic signal control system based on CLY Point1 algorithm according to claim 2, wherein: the algorithm processing module (15) adopts a CLY Point1 algorithm to control the traffic signals, and the algorithm is realized by the following steps:
(1) arranging real-time timing of each phase, firstly giving first phase pre-timing, and then estimating the number of arriving vehicles and pedestrians of the phase; giving the time when the next phase starts passing, then giving weight of sigma and delta to control the timing of the current phase, and passing through TminAnd TmaxObtaining an optimized timing t of the current phase;
(2) and counting and predicting the number of the retained vehicles and pedestrians in the period and the number of the vehicles and pedestrians in the period of each phase, further calculating the sum of delay time of all vehicles and pedestrians in the period, and providing initial data for the next period.
6. The traffic signal control system based on CLY Point1 algorithm according to claim 1, wherein: the pedestrian real-time feedback and strain module (5) comprises a power switch mechanism, a voice communication mechanism, a camera monitoring mechanism and a real-time video storage and transmission mechanism, wherein the voice communication mechanism is in communication connection with the central management module (1) through the network transmission module (2), and the voice communication mechanism is in communication connection with the area control module (3) through the local area communication module (4).
7. The traffic signal control system based on CLY Point1 algorithm according to claim 1, wherein: the video monitoring module (8) and the violation monitoring module (9) both adopt high-definition cameras to carry out picture shooting and recording and photographing monitoring.
8. The traffic signal control system based on CLY Point1 algorithm according to claim 1, wherein: and the traffic signal control module (6) is arranged on a roadbed at one side of the traffic signal lamp group (7).
9. The traffic signal control system based on CLY Point1 algorithm according to claim 1, wherein: the traffic signal control module (6) controls the working modes of the traffic signal lamp group (7), the video monitoring module (8) and the violation monitoring module (9) in real time in a physical control mode and a remote wireless control mode.
10. The traffic signal control system based on CLY Point1 algorithm according to claim 1, wherein: the traffic signal control module (6) temporarily controls the working mode of the traffic signal lamp group (7) so that the red lamp is changed into the green lamp after flickering for several seconds.
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Application publication date: 20210907 |
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