CN114187767A - Traffic signal control method, control module, interface module and simulation test system - Google Patents
Traffic signal control method, control module, interface module and simulation test system Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 225
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000011217 control strategy Methods 0.000 claims abstract description 27
- 230000006854 communication Effects 0.000 claims description 18
- 238000004891 communication Methods 0.000 claims description 17
- 238000012986 modification Methods 0.000 claims description 3
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- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 238000011156 evaluation Methods 0.000 abstract description 6
- 230000001133 acceleration Effects 0.000 abstract description 3
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- 238000005457 optimization Methods 0.000 description 3
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- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
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- 230000003993 interaction Effects 0.000 description 2
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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
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
Abstract
The invention relates to the field of traffic signal control, and discloses a traffic signal control method capable of accelerating simulation. The method comprises the following steps: the traffic signal control module acquires traffic flow data of the simulated intersection and the simulation speed of the traffic simulation module, wherein the traffic flow data are issued by the upper computer. And the traffic signal control module controls according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data. The traffic signal control module adjusts the clock running speed according to the simulation speed and generates a simulation driving instruction; the traffic signal control module outputs the simulation driving instruction and the control data, and the interface module can drive the traffic simulation module according to the simulation driving instruction. The method is used for testing, evaluating, verifying and simulating the traffic control strategy function of the traffic signal control module. The synchronous acceleration operation of the traffic simulation module and the traffic signal control module is realized, and the evaluation test result of the control strategy of the traffic signal control module is obtained more quickly.
Description
Technical Field
The invention relates to the field of traffic signal control, in particular to a traffic signal control method, a control module, an interface module and a simulation test system capable of accelerating simulation.
Background
With the development of economy, the urban traffic congestion problem becomes more serious, the research and development and optimization of the traffic signal control strategy become a popular subject in the field of traffic control research, and therefore the evaluation test and the inspection of the traffic signal control strategy also become new problems.
At present, the existing traffic control hardware-in-loop simulation platform basically uses the existing signal machine and simulation software as backgrounds, signal machine interface equipment based on a single chip microcomputer is developed and designed, the conversion and transmission functions of all data need to be completed on the signal machine interface equipment, the workload of the signal machine interface equipment is huge, the time consumption of data conversion and transmission is long, one release period of the signal machine is long, and the cost of test time is high if a plurality of periods need to be tested or the test is carried out for a plurality of times.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a traffic signal control method, a control module, an interface module and a simulation test system capable of accelerating simulation, which are used for test evaluation and verification simulation of the control strategy function of a traffic signal control module.
The invention adopts the following technical scheme: a traffic signal control method, comprising:
the method comprises the steps that traffic flow data of a simulated intersection and simulation speed of a traffic simulation module are obtained, wherein the traffic flow data and the simulation speed of the traffic simulation module are sent by an upper computer, the upper computer comprises the traffic simulation module and an interface module, the interface module is in communication connection with the traffic simulation module, the traffic simulation module can simulate the simulated intersection to obtain traffic flow data of the simulated intersection, and the interface module can send the traffic flow data;
controlling according to the traffic flow data and a traffic signal control strategy to obtain real-time release period data;
adjusting the clock running speed according to the simulation speed, and generating a simulation driving instruction;
and outputting the simulation driving instruction and the control data, wherein the interface module can modify the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data, and can drive the traffic simulation module according to the simulation driving instruction.
Further, the adjusting of the clock running speed according to the simulation speed and the generation of the simulation driving instruction comprise running for one simulation second according to the simulation speed and sending the simulation driving instruction to the interface module; the interface module can drive the traffic simulation module to execute a simulation second according to the received simulation driving instruction; the simulation speed per second = simulation time.
Further, the real-time release period data comprises real-time release light color and timing scheme data.
Further, the traffic flow data includes queuing length and import vehicle flow information.
The invention also provides a traffic signal control method, which comprises the following steps: reading the traffic flow number of a simulated intersection of a traffic simulation module, and sending the traffic flow data of the simulated intersection to a traffic signal control module, wherein the traffic signal control module can control according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
receiving real-time release period data and a simulation driving instruction sent by the traffic signal control module;
modifying the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data;
and driving the traffic simulation module according to the simulation driving instruction so that the simulated intersection of the traffic simulation module and the traffic signal control module run synchronously.
Further, the driving the traffic simulation module according to the simulation driving instruction so that the simulated intersection of the traffic simulation module and the traffic signal control module run synchronously comprises: and driving the traffic simulation module to execute a simulation second according to the simulation driving instruction, wherein the traffic control module can run the simulation second according to the simulation speed, and the simulation second is the simulation speed = the simulation time.
The invention provides a traffic signal control module, comprising:
the system comprises an acquisition unit, a simulation unit and a control unit, wherein the acquisition unit is used for acquiring traffic flow data of a simulated intersection and simulation speed of a traffic simulation module, the traffic flow data and the simulation speed are sent by an upper computer, the upper computer comprises the traffic simulation module and an interface module, the interface module is in communication connection with the traffic simulation module, the traffic simulation module can simulate the simulated intersection to obtain traffic flow data of the simulated intersection, and the interface module can send the traffic flow data;
the control unit is used for controlling according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
the adjusting unit is used for adjusting the clock running speed according to the simulation speed and generating a simulation driving instruction;
the interface module can modify the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data, and can drive the traffic simulation module according to the simulation driving instruction.
The present invention provides an interface module, comprising:
the reading module is used for reading the traffic flow number of a simulated intersection of the traffic simulation module and sending the traffic flow data of the simulated intersection to the traffic signal control module, wherein the traffic signal control module can control according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
the receiving module is used for receiving the real-time release period data and the simulation driving instruction sent by the traffic signal control module;
the modification module is used for modifying the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data;
and the driving module is used for driving the traffic simulation module according to the simulation driving instruction so as to enable the simulated intersection of the traffic simulation module and the traffic signal control module to synchronously operate.
The invention provides a simulation test system, comprising: the traffic signal control module comprises an upper computer and the traffic signal control module, wherein the upper computer comprises a traffic simulation module and the interface module, the interface module is in communication connection with the traffic simulation module, and the traffic signal control module is in communication connection with the interface module.
Further, the traffic signal control module realizes communication connection with the interface module through an RS232 interface.
The invention has the advantages that: the system realizes the real-time detection of the timing scheme of the simulated traffic flow data and the traffic signal control module and the discharge state of the signal lamp group, so as to realize the synchronous operation of a simulated road network and the traffic signal control module in traffic simulation software and assist the real-time simulation test of the control strategy of the traffic signal control module; and the simulation operation speed is controllable, the actual time consumed by simulation operation in one release period can be shortened, the time cost is saved, and the evaluation test result of the control strategy of the traffic signal control module is obtained more quickly.
Drawings
FIG. 1 is a diagram of a simulation test system architecture.
Fig. 2 is a diagram of a data interaction architecture.
FIG. 3 is a flow chart of the interface module communicating with the traffic signal control module.
FIG. 4 is a diagram of a process for establishing a connection between a traffic control module and simulation software.
FIG. 5 is a diagram of the implementation process of synchronous simulation operation of the traffic control module and the simulation software.
Detailed Description
In order to make the technical solutions of the embodiments of the present application better understood, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The structure of the traffic signal control module function simulation test system is shown in figure 1, and the system data interaction structure is shown in figure 2.
In a traffic signal control method provided by the present invention, the method includes:
the traffic signal control module acquires traffic flow data of a simulated intersection and a simulation speed of the traffic simulation module, wherein the traffic flow data are transmitted by an upper computer, the upper computer comprises the traffic simulation module and an interface module, the interface module is in communication connection with the traffic simulation module, the traffic simulation module can simulate the simulated intersection to obtain traffic flow data of the simulated intersection, and the interface module can transmit the traffic flow data.
Specifically, the traffic flow data includes queuing length and inlet traffic flow information.
The traffic signal control module controls according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
specifically, the real-time release period data includes real-time release light color and timing scheme data.
The traffic signal control module adjusts the clock running speed according to the simulation speed and generates a simulation driving instruction;
specifically, the interface module can drive the traffic simulation module to execute a simulation second according to the received simulation driving instruction.
The traffic signal control module outputs the simulation driving instruction and the control data, and the interface module can modify the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data and can drive the traffic simulation module according to the simulation driving instruction.
In another traffic signal control method provided by the present invention, the method includes:
the interface module reads the traffic flow number of a simulated intersection of the traffic simulation module and sends the traffic flow data of the simulated intersection to the traffic signal control module, wherein the traffic signal control module can control the simulated intersection according to the traffic flow data and a traffic signal control strategy to obtain real-time release period data;
the interface module receives real-time release period data and a simulation driving instruction sent by the traffic signal control module;
the interface module modifies the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data;
and the interface module drives the traffic simulation module according to the simulation driving instruction so that the simulated intersection of the traffic simulation module and the traffic signal control module synchronously operate.
Specifically, the interface module drives the traffic simulation module to execute a simulation second according to the simulation driving instruction, wherein the traffic control module can run the simulation second according to the simulation speed, and the simulation second is the simulation speed = the simulation time.
In the two methods, the traffic simulation software preferably adopts Vissim software. And the interface module carries out secondary development on the Vissim through an interface so as to acquire and modify information of vehicles, signal lamps, detectors and the like of the simulated intersection in the Vissim software. The traffic signal control module and the Vissim software simulation acceleration synchronous operation are realized by that the traffic signal control module sends a simulation driving instruction to drive the Vissim software to perform simulation, the traffic signal control module operates for one simulation second (1 second, actual time) at a set simulation speed, the simulation driving instruction is sent to the interface module, the control interface module sends a response instruction to the control module and simultaneously drives the Vissim software to perform one simulation second, so that the simulation acceleration of the control module and the Vissim software is realized, the synchronous operation can be realized, and the time cost is saved in the operation. The simulation speed of simulation second = simulation time, the simulation time is virtual time, that is, the accelerated simulation speed is 10, the simulation runs for 1 second (actual time, in the present invention, one simulation second), and the simulation time of the Vissim software and the control module clock running is 10 seconds.
In a traffic signal control module provided in the present invention, the traffic signal control module includes:
the system comprises an acquisition unit, a simulation unit and a control unit, wherein the acquisition unit is used for acquiring traffic flow data of a simulated intersection and simulation speed of a traffic simulation module, the traffic flow data and the simulation speed are sent by an upper computer, the upper computer comprises the traffic simulation module and an interface module, the interface module is in communication connection with the traffic simulation module, the traffic simulation module can simulate the simulated intersection to obtain traffic flow data of the simulated intersection, and the interface module can send the traffic flow data;
the control unit is used for controlling according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
the adjusting unit is used for adjusting the clock running speed according to the simulation speed and generating a simulation driving instruction;
the interface module can modify the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data, and can drive the traffic simulation module according to the simulation driving instruction.
In an interface module provided by the present invention, the interface module includes:
the reading module is used for reading the traffic flow number of a simulated intersection of the traffic simulation module and sending the traffic flow data of the simulated intersection to the traffic signal control module, wherein the traffic signal control module can control according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
the receiving module is used for receiving the real-time release period data and the simulation driving instruction sent by the traffic signal control module;
the modification module is used for modifying the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data;
and the driving module is used for driving the traffic simulation module according to the simulation driving instruction so as to enable the simulated intersection of the traffic simulation module and the traffic signal control module to synchronously operate.
The invention provides a simulation test system, which comprises: the traffic signal control module comprises an upper computer and the traffic signal control module, wherein the upper computer comprises a traffic simulation module and the interface module, the interface module is in communication connection with the traffic simulation module, and the traffic signal control module is in communication connection with the interface module. The traffic signal control module can realize communication connection with the interface module through an RS232 interface.
The connection communication process of the invention is as follows: after the control interface module is opened, firstly, the traffic signal control module is electrified and started to be connected with a computer, and meanwhile, basic parameters of a communication serial port are configured on the interface of the control interface module and the serial port is opened, so that the serial port communication function of the traffic signal control module and the control interface module is realized; secondly, a Vissim software interface is called in the control interface module to start the Vissim software, a road network file is loaded in the Vissim software (the traffic parameters are configured in advance), and Vissim simulation parameters and a simulation evaluation function are set. Then, simulation is started, the control interface module sends a request connection instruction to the traffic control module, the signal control module returns a response instruction after receiving the instruction, the control interface module sets the Vissim software to the same running state (the current running phase, the current running period executed time, the timing scheme and the like) as the signal machine according to the request instruction response data, after the state synchronization is completed, the clock running speed of the traffic signal control module is set to be the same as the Vissim simulation speed, and then synchronous simulation can be started, namely the traffic signal control module is connected with the Vissim program to complete, and the flow is shown in fig. 4.
The control interface module of the invention regularly obtains traffic flow data information collected by the Vissim simulation road network detector, such as queuing length, inlet traffic flow and detector information, converts the data according to a communication protocol and then transmits the converted data to the traffic signal control module to be used as intersection real-time traffic flow data information required by the traffic signal control module to control strategy optimization operation, the traffic monitoring module carries out optimization control, coordination control or request control according to the traffic flow data, and real-time adjusts output light color and intersection timing scheme, sends the timing scheme information and current operation phase light color information to the interface module, and the interface module calls the interface to modify the signal light group timing scheme of the Vissim simulation road network, thereby realizing traffic behaviors such as vehicle queuing or parking in the simulation road network and responding to the control of the traffic signal control module. At this point, the traffic signal control module and the Vissim implement synchronous operation, and the implementation process is as shown in fig. 5.
The interface module end can control the stopping and starting of the traffic control module and the Vissim road network simulation test, the traffic control module receives the simulation stopping signal, stops the operation of the control strategy, stops sending the execution instruction to the interface module, and simultaneously keeps the current light color and the operation state information of the signal lamp, so that the next time of starting simulation can start simulation operation from the operation position finished last time.
The invention adopts a real-time online simulation test technology, can perform more real simulation operation, shortens the time required by simulation, reduces the time cost and improves the efficiency of the test evaluation of the traffic control strategy. The test can be repeated under the same test condition, the stability of the control strategy can be tested for multiple times, and the control effect changed before and after the control strategy can be compared. The system can be used for testing and evaluating various signal control strategies and algorithms, and can individualize the control strategy algorithm program of the traffic signal control module, thereby realizing the system universality.
Claims (10)
1. A traffic signal control method, comprising:
the method comprises the steps that traffic flow data of a simulated intersection and simulation speed of a traffic simulation module are obtained, wherein the traffic flow data and the simulation speed of the traffic simulation module are sent by an upper computer, the upper computer comprises the traffic simulation module and an interface module, the interface module is in communication connection with the traffic simulation module, the traffic simulation module can simulate the simulated intersection to obtain traffic flow data of the simulated intersection, and the interface module can send the traffic flow data;
controlling according to the traffic flow data and a traffic signal control strategy to obtain real-time release period data;
adjusting the clock running speed according to the simulation speed, and generating a simulation driving instruction;
and outputting the simulation driving instruction and the control data, wherein the interface module can modify the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data, and can drive the traffic simulation module according to the simulation driving instruction.
2. The traffic signal control method of claim 1, wherein the adjusting the clock running speed according to the simulation speed and generating the simulation driving command comprises:
running a simulation second according to the simulation speed, and sending a simulation driving instruction to the interface module; the interface module can drive the traffic simulation module to execute a simulation second according to the received simulation driving instruction; the simulation speed per second = simulation time.
3. The traffic signal control method of claim 1, wherein the real-time release period data comprises real-time release light and timing scheme data.
4. The traffic signal control method of claim 1, wherein the traffic flow data includes queue length, ingress traffic flow information.
5. A traffic signal control method, comprising: reading the traffic flow number of a simulated intersection of a traffic simulation module, and sending the traffic flow data of the simulated intersection to a traffic signal control module, wherein the traffic signal control module can control according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
receiving real-time release period data and a simulation driving instruction sent by the traffic signal control module;
modifying the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data;
and driving the traffic simulation module according to the simulation driving instruction so that the simulated intersection of the traffic simulation module and the traffic signal control module run synchronously.
6. The traffic signal control method according to claim 5, wherein the driving the traffic simulation module according to the simulation driving command so that the simulated intersection of the traffic simulation module and the traffic signal control module run synchronously comprises: and driving the traffic simulation module to execute a simulation second according to the simulation driving instruction, wherein the traffic control module can run the simulation second according to the simulation speed, and the simulation second is the simulation speed = the simulation time.
7. A traffic signal control module, comprising:
the system comprises an acquisition unit, a simulation unit and a control unit, wherein the acquisition unit is used for acquiring traffic flow data of a simulated intersection and simulation speed of a traffic simulation module, the traffic flow data and the simulation speed are sent by an upper computer, the upper computer comprises the traffic simulation module and an interface module, the interface module is in communication connection with the traffic simulation module, the traffic simulation module can simulate the simulated intersection to obtain traffic flow data of the simulated intersection, and the interface module can send the traffic flow data;
the control unit is used for controlling according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
the adjusting unit is used for adjusting the clock running speed according to the simulation speed and generating a simulation driving instruction;
the interface module can modify the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data, and can drive the traffic simulation module according to the simulation driving instruction.
8. An interface module, comprising:
the reading module is used for reading the traffic flow number of a simulated intersection of the traffic simulation module and sending the traffic flow data of the simulated intersection to the traffic signal control module, wherein the traffic signal control module can control according to the traffic flow data and a traffic signal control strategy to obtain real-time release cycle data;
the receiving module is used for receiving the real-time release period data and the simulation driving instruction sent by the traffic signal control module;
the modification module is used for modifying the release timing parameters of the simulated intersection of the traffic simulation module according to the real-time release period data;
and the driving module is used for driving the traffic simulation module according to the simulation driving instruction so as to enable the simulated intersection of the traffic simulation module and the traffic signal control module to synchronously operate.
9. A simulation test system, comprising: the upper computer and the traffic signal control module of claim 7, the upper computer comprises a traffic simulation module and the interface module of claim 8, the interface module is in communication connection with the traffic simulation module, and the traffic signal control module is in communication connection with the interface module.
10. The simulation test system of claim 9, wherein the traffic signal control module is communicatively coupled to the interface module via an RS232 interface.
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