CN109606433B - Road traffic signal simulation system applied to tramcar - Google Patents
Road traffic signal simulation system applied to tramcar Download PDFInfo
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- CN109606433B CN109606433B CN201811587104.1A CN201811587104A CN109606433B CN 109606433 B CN109606433 B CN 109606433B CN 201811587104 A CN201811587104 A CN 201811587104A CN 109606433 B CN109606433 B CN 109606433B
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- 230000003993 interaction Effects 0.000 claims abstract description 76
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- 238000012360 testing method Methods 0.000 claims description 47
- 230000005284 excitation Effects 0.000 claims description 11
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/60—Testing or simulation
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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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Abstract
The invention relates to a road traffic signal simulation system applied to a tram, which comprises an industrial personal computer and a tram track signal system OLC, wherein the industrial personal computer is connected with the tram track signal system OLC through a DIO board card, a UI interaction module, a traffic flow simulation module and a road traffic signal control system TSC are embedded in the industrial personal computer, the UI interaction module is respectively connected with the tram track signal system OLC and the traffic flow simulation module, and the traffic flow simulation module is connected with the road traffic signal control system TSC. Compared with the prior art, the method has the advantages of providing a real and reliable tramcar signal system simulation environment and the like.
Description
Technical Field
The invention relates to a road traffic signal simulation system, in particular to a road traffic signal simulation system applied to a tramcar.
Background
In the current urban public transportation system, the modern tramcar is taken as a new generation of green sustainable development transportation means, and starts to reenter the field of vision of people, and has the characteristics of medium transportation capacity, low manufacturing cost, short construction period, small pollution, small noise and the like, thereby being very suitable for bearing the functions of backbone buses of small and medium-sized cities in China or suburban connection around large-sized cities. Modern tramlines are gradually built in many cities in China. The main application scene of the modern tramcar system is urban road traffic, no completely closed running space exists, most of the tramcars are laid in a level crossing mode at an urban road intersection, and the tramcars need to share road rights with the road traffic at the intersection. In order to increase the travel speed of a tramcar, a plurality of tramcar projects adopt an intersection control mode of leading in intersection priority. When the tram approaches the crossing, the tram track side signal system can send a train approaching signal to the road traffic signal control system, then the road traffic control machine finishes operation and feeds back the state of the communication signal to the tram signal system, and after receiving the state of signal opening, the tram signal system opens a dedicated signal lamp for the train, gives the train to pass and ensures the safety of road traffic.
In an actual engineering project, a set of tramcar road traffic simulation signal system is built by using an industrial personal computer, traffic flow simulation software and a DIO board card, so that the simulation of the tramcar whole-line road traffic flow can be realized, the signal states of all intersections can be output to a tramcar intersection priority system in real time through the DIO board card according to the design requirements in the actual project, the data interaction between the road traffic signal system and the tramcar signal system is simulated, and the interconnection of two large systems of road traffic and tramcar signals is realized. The simulation system can realize the butt joint with the tramcar simulation test platform, simulate the actual running state of the tramcar more truly, can be used for traffic simulation research of the tramcar and road traffic flow, can also be used as a test tool of a tramcar intersection priority signal system, and has the advantages of simple deployment, low cost, high simulation reduction degree and the like.
At present, no simulation test platform integrating a road traffic control system and a tram signal system exists in China, and most simulation tests for trams are only based on tram modules in traffic flow simulation software. The common traffic flow simulation software does not have the function of completely simulating the tramcar signal system, so that the simulation result often has larger difference from the actual operation result. Therefore, perfect tramcar road signal simulation test software is built, the butt joint of a road traffic simulation platform and a track signal system simulation platform is realized, and the method has extremely important significance in the aspects of tramcar system design, equipment test, road traffic influence analysis and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a road traffic signal simulation system applied to a tramcar.
The aim of the invention can be achieved by the following technical scheme:
the road traffic signal simulation system comprises an industrial personal computer and a tram track signal system OLC, wherein the industrial personal computer is connected with the tram track signal system OLC through a DIO board card, a UI interaction module, a traffic flow simulation module and a road traffic signal control system TSC are embedded in the industrial personal computer, the UI interaction module is respectively connected with the tram track signal system OLC and the traffic flow simulation module, and the traffic flow simulation module is connected with the road traffic signal control system TSC;
after receiving detector signals of a tramcar rail signal system OLC through a DIO board card, the UI interaction module outputs the detector signals to a TSC through a software interface to trigger the tramcar intersection priority in a simulation scene, the TSC can operate a tramcar intersection priority strategy and adjust road signals according to the priority signals, after the simulation TSC intersection priority application, when a signal wheel is transferred to a tramcar priority communication phase, the UI interaction module outputs corresponding rail signal control instructions to the UI interaction module through the software interface, the UI interaction module analyzes and processes the rail signal control instructions, and then the DIO board card outputs control signal quantity of the rail signal lamp to the OLC, and finally implementation of tramcar signal priority and linkage of two large systems of a road rail are completed.
Preferably, the DIO board card comprises a digital input board card, a digital output board card, a first terminal row, a second terminal row and a relay, wherein the digital input board card is connected with the tram track signal system OLC through the first terminal row, and the digital output board card is connected with the tram track signal system OLC through the second terminal row and the relay in sequence.
Preferably, the tram track signal system OLC comprises a track signal lamp, a track side detector and a track signal controller, wherein the track signal controller is respectively connected with the track signal lamp and the track side detector, and the track side detector is arranged on a tram track close to an intersection;
the trackside detectors are arranged at different positions according to different functions, and the trackside detectors can be sequentially divided into a forecast detector, a request detector, an entering detector and an exiting detector from far to near;
when a train runs over the trackside detector, the trackside detector is excited and outputs a level signal to the track signal controller, and after the track signal controller receives the signal, the track signal controller outputs a corresponding signal to the TSC according to control logic and drives a track signal lamp of the tramcar according to feedback of the TSC, so that unified linkage of the tramcar signal and a road traffic signal is realized.
Preferably, the UI interaction module is an operation interface for providing to a user, and the user intuitively sees each trackside detector, track signal lamp and intersection priority forecast, request and occupation state in the tramcar signal system on the operation interface;
the states of each track side detector and track signal lamps in the tramcar track signal system OLC are controlled through a manual input mode, and different testing scenes are simulated;
loading a simulation map, and checking the real-time running state and key parameters of the train in a simulation scene through an interface of the traffic flow simulation module.
Preferably, the traffic flow simulation module utilizes an interface of traffic flow simulation software, realizes the butt joint with a simulation scene in the background, can output various key parameters and traffic evaluation results in the road traffic flow simulation scene to the UI interaction module, and the UI interaction module can input control parameters of a track signal system to the simulation scene through the interface to finish the running simulation of the tramcar in a real line.
Preferably, the industrial personal computer is connected with the tramcar track signal system OLC in a level signal acquisition mode;
the industrial personal computer is provided with extensible board card slots, a user can install a corresponding number of DIO board cards according to requirements, and through driving and developing tools of the DIO board cards, the conversion of the semaphore of the operating system software and the semaphore of the physical level can be realized, and the input and the output from the software level to the hardware level can be realized.
Preferably, the DIO board card can adapt to OLCs with different input and output arrangements through an external terminal strip and a relay, and can support input and output signal acquisition under different voltages; by adopting the method, the real OLC and TSC interface can be fully simulated on hardware and software.
Preferably, the simulation system not only supports the simulation of a single intersection priority system on a tramcar line, but also can support the simulation test of multiple intersections and even full lines;
the industrial personal computer and the DIO board card can be expanded according to the quantity of intersections and signal quantities required by users, and simulation test scenes of multiple intersections are provided for the users;
meanwhile, aiming at the test requirements of multiple intersections, the simulation system is also provided with an Ethernet interface and a communication mode, and when a user does not access the requirements of a large number of real OLCs, the simulation system can realize data interaction with the outside through a network, and the acquired signal quantity is input and output in the form of the Ethernet.
Preferably, the UI interaction module provides a graphical display interface and user-friendly interaction for a user, and the excitation signal output by the trackside detector, the level signal output by the OLC to the TSC, and the light level control signal output by the TSC to the OLC in the actual engineering application scene are visually presented in the UI interaction module;
The UI interaction module provides two control modes, namely an automatic input mode and a manual input mode for a user, and in the automatic input mode, the simulation system can drive the TSC and the industrial personal computer according to the detector signal quantity acquired from the real OLC and output the control signal quantity of the signal lamp special for the tramcar to the OLC in real time;
the user can visually see the sending and receiving states of the signal quantities on the UI interaction module interface: advance notice, request, enter and leave detector state, tram special signal lamp state, road traffic flow running condition;
in a manual input mode, all the trackside detectors and the track signal lamps on the interface are changed into clickable states, and a user can manually complete the input or output of the signal quantity by clicking the detectors and the track signal lamp controls on the interface;
the manual mode can fully promote the degree of freedom of user testing, and the user can simulate complex scenes which are difficult to appear in actual operation or simulate abnormal input and output to evaluate the operation stability of OLC by clicking the control, so that the testing means of the user are enriched, and the comprehensive testing of the OLC is facilitated for the user.
Preferably, in the aspect of traffic simulation, the simulation system provides a user with two control modes of accompanying and preferential requests;
In the accompanying mode, the simulation system will not collect the detector signals generated by clicking on the OLC or the UI interaction module, the TSC will keep the operation mode in the conventional road traffic control mode, the simulation system will not open the junction priority signals for the tram, but will output the open traffic signals of the signal lamp special for the tram to the OLC when the TSC rotates to the phase belonging to the tram, in the mode, the tram cannot pass preferentially when arriving at the junction, but will not cause great influence on the road traffic flow;
in the priority request mode, the simulation system collects detector signals generated by clicking on the OLC or the UI interaction module, the TSC corresponds to the collected forecast, request, entering and leaving signals, and when the tram arrives at the intersection, the simulation system outputs an open traffic signal of a signal lamp special for the tram to the OLC according to a priority strategy to implement signal priority for the tram.
Compared with the prior art, the invention has the following advantages:
(1) The complete tramcar road traffic signal simulation system is built and comprises a road traffic signal control system TSC, a tramcar urban road simulation environment, a track signal control system OLC and UI interactive software, and a real and reliable tramcar signal system simulation environment is provided. The method can realize the operation simulation of the tram, can provide the comprehensive evaluation of the tram operation and the road traffic flow along the line under a specific planning scheme for users as a simulation evaluation tool of the tram operation, and can provide reliable evaluation analysis for the design scheme in the aspects of line planning, operation management, site layout and the like.
(2) The simulation system restores interfaces of the OLC system and the TSC system in the form of the industrial personal computer, the IO board card and the terminal strip, can adapt to requirements of different OLC systems, is easy to deploy and expand, supports a signal control system for simultaneously simulating and testing a plurality of intersections, can provide a real testing environment and a complex intersection priority scene for the OLC system, and can be used as a testing and verifying tool of the OLC system.
(3) The UI software provides a manual input mode, and a user can control any input and output between the TSC and the OLC system through clicking on an interface, so that sufficient testing freedom degree, particularly simulation of some complex scenes, is provided for the user.
(4) The simulation TSC system supports two working modes of accompanying and priority request, can provide two scenes of no priority request when the tramcar runs for the user, enables the user to analyze benefits brought by the operation of the tramcar and influences on road traffic flow through comparison intuitively, and assists the user in making decisions.
Drawings
FIG. 1 is a schematic diagram of a simulation system architecture;
FIG. 2 is a schematic diagram of connection between an IO module of a simulation system and an OLC system;
FIG. 3 is a schematic flow chart of the simulation system in a tram priority mode;
FIG. 4 is a schematic diagram of a common intersection Input interface of a UI interaction module;
fig. 5 is a schematic diagram of a common intersection Output interface of the UI interaction module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The invention is applied to a road traffic signal simulation system of a tram, integrates a road traffic signal control system (TSC, traffic signal controller for short, controlling road traffic signal lamp) on an industrial personal computer, realizes the external IO input and output of the industrial personal computer through a real DIO board card, and is used for butting a real tram track signal system (OLC for short, optimal level-crossing controller for controlling a signal lamp special for the tram) so as to completely simulate the real physical interfaces of two systems. In addition, the whole architecture of the road traffic signal system is integrated in the operating system of the industrial personal computer through an external interface of traffic flow simulation software by utilizing the prior art. The real road running environment of the tramcar can be completely simulated in software, elements such as speed, station, crossing, road traffic flow and the like of the tramcar in the environment are fully restored, and the simulation test can be closer to the actual scene as much as possible.
The UI interaction module in the simulation system also realizes acquisition, analysis and processing of the IO module signal quantity, outputs the signal quantity to the TSC system through a software interface after receiving the detector signal quantity from the OLC system, realizes the priority triggering of the tramcar crossing in the simulation scene, and the TSC system can operate the tramcar crossing priority strategy and adjust the road signal according to the priority signals, wherein the method comprises the modes of ending the previous red light phase in advance, prolonging the passing phase of the tramcar, inserting a special phase for the tramcar and the like, and different priority strategies are determined according to the road signal phase when the tramcar reaches the crossing in advance. After the simulation TSC system intersection is preferentially applied, when the signal wheel is turned to the tram priority communication phase, a corresponding track signal control instruction is output to the UI interaction module through the software interface, the UI interaction module analyzes and processes the track signal control instruction, and then the IO module outputs the control signal quantity of the track signal lamp to the OLC system, so that the implementation of the tram signal priority and the linkage of two systems of the road track are finally completed.
The simulation system can be well used for testing and verifying a tramcar real rail side signal system, can also be used as an evaluation tool for the influence of the tramcar on the road traffic flow along the line, and has very important practical significance.
The invention is characterized in that the simulation system comprises the following key points:
1. the system has a complete tramcar intersection priority system architecture, basically covers each component part in a real tramcar signal control system, furthest restores a real scene, reduces the complexity of the whole system, and has good operability, easy deployment and good expansibility. The simulation system of the invention can be mainly divided into a plurality of components, namely a road traffic signal control system TSC, a tramcar urban road simulation environment, a track signal control system OLC and a UI interaction module.
2. The interface between the TSC system and the OLC system in the actual application scene is realized by adopting components such as the data acquisition IO board card, the terminal strip, the hard wire, the relay and the like. The method realizes the interconnection of the real OLC system and the TSC system integrated on the PC, furthest reserves the real restoration of the interface, and plays a very important role in test verification and simulation. In addition, the simulation system of the invention can also provide an additional network interface, and the docking of the OLC system and the TSC system can be realized in the form of Ethernet. If multiple-intersection simulation test is needed, the invention can realize data interaction with the OLC system through the network under the condition that enough OLC cabinets cannot be provided, and can fully support the test and simulation scene of multiple intersections.
The UI interaction module can provide a manual input mode for a user, and the manual input mode can bring great testing freedom to the user, particularly when a simulation system needs to simulate some more complex tramcar intersection priority scenes. All the input of the trackside detector and the output of the signal lamp control instruction on the UI software interface can be operated by clicking of a user, so that the triggering of the input and the output of each path is realized, and the requirements of different testing scenes of the user are met. In addition, the simulation system supports both companion and priority requests for operation modes. When the software is in the companion mode, the UI software no longer responds to the advance notice and request detector signals input from the OLC, but controls the rotation of the tram-specific signals in accordance with the road signal light status output from the TSC system. When the software is in the priority request mode, the UI software normally forwards the forecast and request detector signals input from the OLC to the TSC system, and the TSC system needs to give a signal for the tramcar to pass preferentially according to the collected forecast and request signals.
The key point 1 is characterized in that the invention simulates a complete tram intersection priority system, and comprises a road traffic signal control system TSC, a tram urban road simulation environment, a UI interaction module and an externally-butted track signal control system OLC.
The main components of the TSC system are a road signal lamp, a road signal controller and a road signal control algorithm, and the system is mainly responsible for controlling the road traffic signal system and also has a tram priority control mode, when no tram arrives at an intersection, the road traffic signal is controlled in a conventional manner, when the tram approaches the intersection, the priority control mode is entered, the time of the train arriving at the intersection is estimated, and the road traffic signal is adjusted to be the tram priority open traffic phase. The system collects the priority forecast, request and occupation signals of the tram crossing from the OLC system, the input signals are all in the form of level signals, when the input signals are collected and the priority request of the tram is completed, the TSC operates the tram priority control algorithm, and after the signals are adjusted, the instruction of starting the signal lamp is output to the OLC system, the output signals are also in the form of level signals, and the output is completed to the OLC system through a hard wire. The interaction between the TSC system and the road traffic flow simulation software is realized through an external interface of the simulation software.
The urban road simulation environment of the tramcar refers to the actual running environment of the tramcar, and comprises various factors such as the length and trend of a running line, the running simulation of the tramcar, the arrangement mode of the track line, the arrangement mode of a station, the distribution of intersections along the line, the road traffic flow, the pedestrians crossing the street and the like, wherein the factors can bring a certain influence to the running of the tramcar. When the tramcar is simulated, the more perfect these factors are, the more the simulation result is close to the real situation. In the invention, the simulation of the urban road environment of the tramcar is realized by road traffic flow simulation software.
The main components of the OLC system are a track signal lamp, a trackside detector, a track signal controller and a track signal control algorithm, and the system is mainly responsible for controlling a track traffic signal system. The OLC system will arrange the trackside detectors at the tramway track adjacent to the intersection, each detector being arranged at a different location according to the function. The distance from the intersection can be divided into a preview, a request, an entering and an exiting detector in sequence from far to near. When the train passes through the detector, the trackside detector is excited and outputs a level signal to the OLC controller, and after the OLC receives the signal, the OLC outputs a corresponding signal to the TSC system according to control algorithm logic and drives a special signal lamp of the tramcar according to feedback of the TSC system. Thus, unified linkage of the tramcar signal and the road traffic signal is realized.
The UI interaction module is an interaction interface with a user, and can be divided into a DIO module, a UI interaction module and a traffic simulation module according to functions. The DIO module comprises a digital input/output board card, and the DIO module is in butt joint with an OLC system through a terminal block and a relay which are externally connected. The UI interaction module is an operation interface provided for a user, and the user can intuitively see states of each trackside detector, signal lamps, intersection priority notice, request, occupation and the like in the tramcar signal system on the UI interface; the states of all the detectors and the signal lamps in the signal system can be controlled through a manual input mode, so that different test scenes can be simulated; the simulation map can be loaded, and the real-time running state and key parameters of the train in the simulation scene are checked through an interface of the traffic flow simulation software. The traffic simulation module utilizes an interface of traffic flow simulation software, realizes the butt joint with a simulation scene in the background, can output various key parameters and traffic evaluation results in the road traffic flow simulation scene to the UI interaction interface, and the UI interface can also input control parameters of a track signal system to the simulation scene through the interface so as to finish the operation simulation of the tramcar in a real line.
The key point 2 is characterized in that a level signal acquisition mode is adopted between the simulation system and the OLC cabinet to restore the application scene in actual engineering. The industrial personal computer selected by the simulation system is provided with an extensible board card slot, and a user can install a corresponding number of IO board cards according to requirements. Through the driving and developing tool of the IO board card, the conversion of the semaphore of the operating system software and the semaphore of the physical level can be realized, and the input and the output from the software level to the hardware level can be realized. The board card can adapt to OLC systems with different input and output layout through the external terminal rows and the relay, and can support input and output signal acquisition under different voltages. By adopting the method, the real OLC and TSC system interface can be fully simulated on hardware and software, so that the test simulation process is more approximate to the real situation, the user can be helped to find problems in the test process, and the situation that the test passes due to imperfect test environment but escape problems occur in field application is reduced.
In addition, the simulation system not only supports the simulation of a single intersection priority system on a tramcar line, but also can support the simulation test of multiple intersections and even full lines. According to the scheme, the industrial personal computer and the IO board card can be expanded according to the quantity of intersections and semaphores required by users, and simulation test scenes of multiple intersections are provided for the users. Meanwhile, aiming at the test requirements of multiple intersections, the simulation system is further provided with an Ethernet interface and a communication mode, and when a user does not access the requirements of a large number of real OLC cabinets, the simulation system can realize data interaction with the outside through a network, and the acquired signal quantity is input and output in the form of the Ethernet.
The key point 3 is characterized in that the UI interaction module provides a graphical display interface and user-friendly interaction operation for a user, and an excitation signal output by a trackside detector, a level signal output by an OLC system to a TSC system, a lamp position control signal output by the TSC system to the OLC system and the like in an actual engineering application scene are intuitively presented in the UI interaction module. The UI interaction module provides two control modes, namely an automatic input mode and a manual input mode for a user. Under the automatic input mode, the simulation system can drive the TSC system and simulation software according to the detector signal quantity collected from the real OLC cabinet, and the control signal quantity of the signal lamp special for the tramcar is output to the OLC system in real time. The user can visually see the sending and receiving states of the signal quantities on the UI interaction module interface: advance notice, request, enter and leave detector status, tram specific signal light status, road traffic flow operating conditions, etc. In the manual input mode, all detectors and annunciators on the interface are changed into clickable states, and a user can manually complete input or output of the semaphore by clicking controls such as the detectors and annunciators on the interface. The manual mode can fully promote the degree of freedom of user testing, and the user can simulate complex scenes which are difficult to appear in actual operation or simulate abnormal input and output to evaluate the operation stability of the OLC system by clicking the control, so that the testing means of the user are enriched, and the comprehensive testing of the OLC system is facilitated for the user.
In addition, in the aspect of traffic simulation, the simulation system provides a user with two control modes of accompanying and prioritizing requests. In the accompanying mode, the simulation system will not collect the detector signal from clicking on the OLC system or UI interaction interface any more, the TSC system will keep its operation mode in the normal road traffic control mode, the simulation system will not open the junction priority signal for the tram, but will output the open traffic signal of the tram dedicated signal lamp to the OLC when the TSC system wheel turns to the phase belonging to the tram. In this mode, the tram will not pass through preferentially when arriving at the intersection, but will not have a major impact on the road traffic flow. In the priority request mode, the simulation system collects detector signals generated by clicking on an OLC system or a UI interactive interface, the TSC system corresponds to the collected forecast, request, entering and leaving signals, and when a tramcar arrives at an intersection, an open passing signal of a signal lamp special for the tramcar is output to the OLC according to a priority strategy to give signal priority to the tramcar.
For specific implementation of the key point 1, as shown in fig. 1, the tramcar road traffic signal simulation system in the embodiment of the invention comprises a UI interaction module, simulation traffic flow software, a TSC system and an external docking OLC system.
The OLC system can control the special signal lamp of the tram through IO signal quantity, and realize the forecast, request, entering and leaving detection of the tram in front of the intersection through the detector arranged beside the tram. The interface between the OLC system and the UI interaction module is a hard-wired level signal quantity. In implementation, the UI interaction module adopts a common PCI board card to collect level signals input and output by the IO port. The main content of the DI input signal includes detector excitation signals at different driving directions at the intersection in the OLC system, OLC system states, priority mode/accompanying mode switching, and other semaphores. The main content of the DO output signal comprises signals such as the lighting state of each lamp position, the TSC automatic/manual control mode, the TSC system state and the like of the special signal lamp of the tram fed back to the UI interaction module by the TSC.
And the DIO module realizes information interaction with the OLC system through a DIO board card. The UI interaction module comprises algorithm logic and a plurality of conventional functions, and can realize data interaction with the OLC system and the TSC system according to the switching of a manual/automatic mode and a priority request/accompanying mode. In addition, UI software can realize the input to specific tramcar line information through configuration file, and the log function is mainly recorded some key parameter's of system change in the operation in-process, can provide detailed data source for the analysis after the simulation test, and man-machine interface passes through the graphical button of image, constructs succinct clear and the detailed operation interface of function for the user. The traffic simulation module adopts a com interface of traffic flow simulation software to realize the connection between the UI software and the traffic flow simulation software. The UI interaction module can transmit the acquired state information of each detector to the traffic flow simulation software through the interface, and acquire the state of each signal lamp group from the traffic flow simulation software so as to decide the output of control instructions of the signal lamp special for the tramcar in the OLC system. In addition, the UI interaction module is also provided with two additional communication interfaces, namely a serial port and an Ethernet.
The traffic flow simulation software can provide a perfect tramcar line operation environment construction for users, can construct a tramcar simulation operation model, relates to factors such as a line map, a line station, a driving plan, an operation speed, a road traffic flow, intersection signals, pedestrian crossing and the like, and can externally open simulation parameters such as a detector, a signal machine, a vehicle, a line and the like through a com interface. In the specific embodiment of the invention, the TSC system is implemented in the form of software, and basic parameters (such as intersection signal period and signal phase distribution) and operation logic thereof are loaded in the simulated traffic flow software. The TSC system can load the conventional cycle of the crossing in the traffic flow simulation software in the form of a configuration file, drive a set priority strategy according to the excitation information of each detector in the traffic flow simulation software, adjust the signal phase of the crossing to be a tramcar open priority traffic signal, output phase switching information to the simulation traffic flow software when the phases are switched, and control the change of road signal lamps in the simulation software.
In the system architecture of the present invention, as shown in fig. 1, the data flow interacted between the systems is mainly the excitation signal of the detector and the control signal of the crossing road signal lamp and the signal lamp special for the tram.
For the implementation of the key point 2, the connection mode of the simulation system and the OLC system in the embodiment of the invention is shown in the figure 2, and the industrial personal computer with the simulation system adopts 220V power input and 24V voltage power supply for signal quantity acquisition between the simulation system and the OLC system. The power supply part realizes the conversion from 220V alternating current to 24 direct current and supplies power for the collection of the signal quantity.
The signal quantity input part of the simulation system, the DI board card is connected with the terminal strip through the patch cord and forms a 24V loop with the DO signal terminal of the OLC system, when the OLC system closes the DO contact, the simulation system DI collects a 24V voltage difference between a certain path DI positive terminal and a certain path DI negative terminal on the board card, and the board card collects a high-level signal; when the OLC system breaks the DO contact, the simulation system DI collects a voltage difference of 0V between a positive terminal and a negative terminal of a certain path DI on the board card, and the board card collects a low-level signal.
And each path of output of the DO board card is provided with three paths of pins corresponding to the positive electrode, the negative electrode and the output signals, and the two ends of the signal acquisition end of the OLC are provided with 24V voltage differences. When the board card needs to output high level, a 24V voltage difference is generated between the signal pin and the positive electrode pin, a relay connected with the signal pin is driven, a relay contact is closed, a loop is formed by a DI acquisition end of the OLC system, and an input high level signal is acquired; when the board card needs to output low level, a 0V voltage difference is generated between the signal pin and the positive electrode pin, the relay contact falls down, and a DI acquisition end loop of the OLC system is disconnected to acquire an input low level signal.
As shown in FIG. 3, the control logic of the simulation system is as follows, and in this embodiment, the control logic for a certain intersection is selected for detailed description, and the operation period of the control logic is 100ms:
(1) After the control logic is started, controlling a thread of a specific intersection to start waiting for receiving intersection advance notice signals in a certain direction from OLC;
(2) If the intersection forecast signal from the OLC is not received, the UI interaction module does not act, the TSC system drives the signal lamp group in the simulation traffic flow software to rotate according to the conventional signal control mode, and continuously waits for the intersection forecast signal from the OLC, and if the intersection forecast signal from the OLC is received, the step (3) is entered;
(3) After receiving the forecast signal, the UI software changes the excitation state of the detector corresponding to the intersection in the traffic simulation flow software, the TSC control algorithm continuously detects the state of the detector, after detecting that the forecast detector in the simulation software is excited, the time of the tramcar reaching the intersection is estimated, and when the signal of the expected arrival period of the tramcar is adjusted according to a preset priority strategy, the phase of the traffic signal is opened, prolonged or inserted in advance for the tramcar;
(4) In the time when the tramcar is expected to reach the intersection, if the TSC receives an OLC request signal forwarded by the UI software, the step (6) is carried out, and if not, the step (5) is carried out;
(5) If the time does not exceed the waiting period of the request signal, continuing to wait for the request signal, returning to the step (4), if the time exceeds the waiting period of the request signal, returning to the step (3), re-entering the phase coordination state by the TSC system, readjusting the phase, and waiting for the request signal of the train;
(6) The method comprises the steps that a TSC locks a preferential passing phase of a tramcar, a phase wheel is waited to be switched to the passing phase of the tramcar, when a given wheel is switched to the passing phase of the tramcar, road traffic signals in the tram traffic flow simulation software are rotated, and after detecting that the road traffic signals are changed to the tram passing phase, a UI interaction module outputs an opening signal of a tram special signal lamp to an OLC system to open the tram special signal lamp;
(7) The TSC system waits for an OLC entering signal forwarded by the UI software, if the entering signal is not received, the step (8) is entered, and if the entering signal is received, the step (9) is entered;
(8) If the special phase time of the tramcar is not finished, continuing to wait, returning to the step (7), if the special phase time of the tramcar is finished, turning the traffic signal phase by the TSC, outputting a closing signal of a special signal lamp of the tramcar to the UI interaction module, returning to the step (3), enabling the TSC system to reenter a phase coordination state, readjust the phase, and readying a request signal of the train;
(9) After receiving the entering signal, the TSC system outputs a closing signal of a signal lamp special for the tram to the UI software interaction software, the UI interaction module sends the closing signal to the OLC system through the DO board card, the special passing signal of the tram is closed, if a train following the tram subsequently enters an intersection, the TSC system keeps on road traffic and the like, and the road traffic flow conflicted with the traffic flow is ensured not to enter the intersection;
(10) The TSC system waits for an OLC clear signal forwarded by the UI software, if the clear signal is not received, the step (11) is carried out, and if the clear signal is received, the step (12) is carried out;
(11) If the time does not exceed the maximum green time of the special phase of the tramcar, continuing to wait, returning to the step (10), if the time exceeds the maximum green time of the special phase of the tramcar, turning the traffic signal phase by the TSC, returning to the step (3), re-entering the phase coordination state by the TSC system, re-adjusting the phase, and re-waiting for a request signal of the train;
(12) The TSC rotates the traffic signal phase and resumes the normal control mode, returning to step (1) and waiting again for a new forenotice signal.
With respect to the specific implementation of the key point 3, as shown in fig. 4 and 5, the present embodiment describes the situation of the common intersection in detail. On the operation interface of the UI interaction module, an input part and an output part are deployed.
The input part displays the detector excitation state from the OLC system, the OLC system state and the TSC priority/accompanying control mode, the graphical control is utilized on the UI interface to present visual display of the intersection condition to the user, when the UI interaction module receives the advance notice, the request, the entering and the clearing signals of the OLC, the advance notice, the request and the occupied detector in the interface are respectively lightened, and the occupied detector is lightened after the entering signal is received, and is extinguished after the clearing signal is received. After receiving the signal of TSC priority, the TSC priority control lamp position is lightened, otherwise, the lamp position is extinguished, and the concomitant control mode is entered.
The output section displays the tram-specific signal lamp control state, the TSC system state, and the automatic/manual control mode from the TSC system. And the UI interface is provided with a graphical control, the visual representation of the control state of the tramcar signaler is presented to a user, and when the UI interaction module receives the corresponding lamp position control state of the TSC system, the corresponding lamp position is turned on or off. In addition, the UI software can simulate the trackside detector and can send an excitation signal of the trackside detector to the OLC system. The detector excitation signal is used as an additional means for testing and simulating the OLC system, in the practical use of the simulation system, if the OLC system is not connected with a real trackside detector, the simulation system can output the simulated detector excitation signal to the OLC system through a DO board card, the OLC can process the signal and then output the signal to a DI board card of UI software through DO again, and the whole logic of preferential control is completed, wherein the signal can only be operated in a manual input mode.
The user can switch the automatic input/manual input mode by being deployed on the UI interface, after the user switches to the manual input mode, all the inputs and outputs are converted into clickable states, and the user can generate corresponding input and output signal quantity by clicking corresponding buttons according to the test requirements of the user, so that the test means of the user are enriched, the simulation system can meet the test requirements under complex, abnormal or fault scenes, and the simulation system can be used as a test tool of an OLC system, and has very important significance for verifying the reliability and stability of the real OLC system.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (9)
1. The road traffic signal simulation system is characterized by comprising an industrial personal computer and a tram track signal system OLC, wherein the industrial personal computer is connected with the tram track signal system OLC through a DIO board card, a UI interaction module, a traffic flow simulation module and a road traffic signal control system TSC are embedded in the industrial personal computer, the UI interaction module is respectively connected with the tram track signal system OLC and the traffic flow simulation module, and the traffic flow simulation module is connected with the road traffic signal control system TSC;
After receiving detector signals of a tramcar rail signal system OLC through a DIO board card, the UI interaction module outputs the detector signals to a TSC through a software interface to realize the preferential triggering of a tramcar intersection in a simulation scene, the TSC can operate a tramcar intersection preferential strategy and adjust road signals according to the preferential signals, after the simulation TSC intersection preferential application, when a signal wheel is transferred to a tramcar preferential communication phase, the UI interaction module outputs corresponding rail signal control instructions to the UI interaction module through the software interface, the UI interaction module analyzes and processes the rail signal control signals, and then the DIO board card outputs control signal quantity of the rail signal lamp to the OLC, so that the implementation of the tramcar signal preferential implementation and the linkage of two large systems of a road rail are finally completed;
the tramcar track signal system OLC comprises track signal lamps, a track side detector and a track signal controller, wherein the track signal controller is respectively connected with the track signal lamps and the track side detector, and the track side detector is arranged on a tramcar track close to an intersection;
the trackside detectors are arranged at different positions according to different functions, and the trackside detectors can be sequentially divided into a forecast detector, a request detector, an entering detector and an exiting detector from far to near;
When a train runs over the trackside detector, the trackside detector is excited and outputs a level signal to the track signal controller, and after the track signal controller receives the signal, the track signal controller outputs a corresponding signal to the TSC according to control logic and drives a track signal lamp of the tramcar according to feedback of the TSC, so that unified linkage of the tramcar signal and a road traffic signal is realized.
2. The road traffic signal simulation system applied to the tram according to claim 1, wherein the DIO board comprises a digital input board, a digital output board, a first terminal row, a second terminal row and a relay, wherein the digital input board is connected with the tram track signal system OLC through the first terminal row, and the digital output board is connected with the tram track signal system OLC through the second terminal row and the relay in sequence.
3. The road traffic signal simulation system applied to the tram according to claim 1, wherein the UI interaction module is an operation interface for providing the user with visual information on the operation interface, such as a track side detector, a track signal lamp, and a junction priority notice, request, and occupation state in the tram signal system;
The states of each track side detector and track signal lamps in the tramcar track signal system OLC are controlled through a manual input mode, and different testing scenes are simulated;
loading a simulation map, and checking the real-time running state and key parameters of the train in a simulation scene through an interface of the traffic flow simulation module.
4. The road traffic signal simulation system applied to the tramcar according to claim 1, wherein the traffic flow simulation module utilizes an interface of traffic flow simulation software, the background realizes the butt joint with a simulation scene, various key parameters and traffic evaluation results in the road traffic flow simulation scene can be output to the UI interaction module, and the UI interaction module can input control parameters of the track signal system to the simulation scene through the interface to complete the operation simulation of the tramcar in a real line.
5. The road traffic signal simulation system applied to the tram according to claim 1, wherein the industrial personal computer is connected with the tram track signal system OLC in a level signal acquisition mode;
the industrial personal computer is provided with extensible board card slots, a user can install a corresponding number of DIO board cards according to requirements, and through driving and developing tools of the DIO board cards, the conversion of the semaphore of the operating system software and the semaphore of the physical level can be realized, and the input and the output from the software level to the hardware level can be realized.
6. The road traffic signal simulation system applied to the tramcar according to claim 5, wherein the DIO board card can adapt to OLCs with different input and output arrangements through an external terminal row and a relay, and can support input and output signal acquisition under different voltages; by adopting the method, the real OLC and TSC interface can be fully simulated on hardware and software.
7. The road traffic signal simulation system applied to the tram according to claim 1, wherein the simulation system not only supports the simulation of a single intersection priority system on the tram line, but also can support the simulation test of multiple intersections and even all lines;
the industrial personal computer and the DIO board card can be expanded according to the quantity of intersections and signal quantities required by users, and simulation test scenes of multiple intersections are provided for the users;
meanwhile, aiming at the test requirements of multiple intersections, the simulation system is also provided with an Ethernet interface and a communication mode, and when a user does not access the requirements of a large number of real OLCs, the simulation system can realize data interaction with the outside through a network, and the acquired signal quantity is input and output in the form of the Ethernet.
8. The road traffic signal simulation system applied to the tram according to claim 1, wherein the UI interaction module provides a graphical display interface and user-friendly interaction for a user, and the trackside detector in the actual engineering application scene outputs an excitation signal, a level signal output from the OLC to the TSC, and a light position control signal output from the TSC to the OLC are intuitively presented in the UI interaction module;
the UI interaction module provides two control modes, namely an automatic input mode and a manual input mode for a user, and in the automatic input mode, the simulation system can drive the TSC and the industrial personal computer according to the detector signal quantity acquired from the real OLC and output the control signal quantity of the signal lamp special for the tramcar to the OLC in real time;
the user can visually see the sending and receiving states of the signal quantities on the UI interaction module interface: advance notice, request, enter and leave detector state, tram special signal lamp state, road traffic flow running condition;
in a manual input mode, all the trackside detectors and the track signal lamps on the interface are changed into clickable states, and a user can manually complete the input or output of the signal quantity by clicking the detectors and the track signal lamp controls on the interface;
The manual mode can fully promote the degree of freedom of user testing, and the user can simulate complex scenes which are difficult to appear in actual operation or simulate abnormal input and output to evaluate the operation stability of OLC by clicking the control, so that the testing means of the user are enriched, and the comprehensive testing of the OLC is facilitated for the user.
9. The road traffic signal simulation system applied to the tram according to claim 1, wherein in terms of traffic simulation, the simulation system provides users with two control modes of accompanying and preferential requests;
in the accompanying mode, the simulation system will not collect the detector signals generated by clicking on the OLC or the UI interaction module, the TSC will keep the operation mode in the conventional road traffic control mode, the simulation system will not open the junction priority signals for the tram, but will output the open traffic signals of the signal lamp special for the tram to the OLC when the TSC rotates to the phase belonging to the tram, in the mode, the tram cannot pass preferentially when arriving at the junction, but will not cause great influence on the road traffic flow;
in the priority request mode, the simulation system collects detector signals generated by clicking on the OLC or the UI interaction module, the TSC corresponds to the collected forecast, request, entering and leaving signals, and when the tram arrives at the intersection, the simulation system outputs an open traffic signal of a signal lamp special for the tram to the OLC according to a priority strategy to implement signal priority for the tram.
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| CN110647055B (en) * | 2019-09-27 | 2024-08-06 | 卡斯柯信号有限公司 | Interface simulation device, system and method for vehicle-mounted equipment of ITCS system |
| CN110553864B (en) * | 2019-09-30 | 2022-03-29 | 暨南大学 | Tramcar simulation operation monitoring system |
| CN111260936B (en) * | 2020-01-17 | 2021-02-02 | 爱易成技术(天津)有限公司 | Configuration method and device of traffic signal machine |
| CN114898580A (en) * | 2022-06-16 | 2022-08-12 | 浙江嘉科电子有限公司 | Linkage control system and method for traffic signal machine and tramcar intersection controller |
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