CN118210290A - Simulation device and method for digital audio track circuit of signal system - Google Patents
Simulation device and method for digital audio track circuit of signal system Download PDFInfo
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Abstract
The invention relates to a simulation device and a simulation method for a digital audio track circuit of a signal system, wherein the device comprises an AF-904 simulator which can simulate a plurality of real AF-904 devices simultaneously, and the AF-904 simulator comprises: the communication module is used for communicating with other systems; the analysis and processing module is used for completing information generation, coding, modulation and demodulation; the man-machine interaction module is used for providing a visual interface; and the fault injection module is used for realizing fault injection of various scenes. Compared with the prior art, the method has the advantages of reducing the cost of indoor test construction test environment equipment and time cost, improving the flexibility of the test, improving the integrity of the test scene coverage and the like.
Description
Technical Field
The invention relates to a rail transit signal system, in particular to a simulation device and a simulation method for a digital audio track circuit of a signal system.
Background
In a train control system (abbreviated as a 'TBTC system') based on a track circuit, the track circuit serves as a train occupation detection device, occupation and clearing states of track sections are provided for a track side system, and the track side system provides locomotive signals such as target speed, target distance and the like for a train through the track circuit according to occupation states of all track sections in a control range and other states such as turnouts, annunciators and the like.
Taking AF-904 digital audio track circuit as an example, the communication interface between the trackside interlocking processing unit and the vehicle-mounted equipment realizes the dual functions of positive line section track occupation detection and ground-to-vehicle locomotive signal transmission. During urban rail transit construction, in order to save time for on-site commissioning of the signalling system, as many functional tests as possible need to be done in the laboratory. However, a 60km length of line requires about 200 AF-904 cages, and if a complete test is to be performed by setting up a relatively complete line, more AF-904 systems are required, which is costly to purchase and requires sufficient space in the laboratory to store the equipment, with a high cost. However, if only a limited AF-904 system is configured, the detected area is limited, many test scenes become unreachable, the test scenes are incomplete, the test coverage rate is insufficient, and some fault scenes cannot be verified due to the use of a real AF-904 system.
The Chinese patent publication No. CN202256610U discloses a digital audio track circuit monitoring device, and particularly discloses a digital audio track circuit monitoring device which comprises a high-resistance isolator, an electric isolator, an analog front-end processor, an AD converter, a digital signal processor, a data communication unit and a PC. But this prior patent is not directed to analog simulation of digital audio track circuits.
Therefore, how to overcome various limitations caused by using a real digital audio track circuit device becomes a technical problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a simulation device and a simulation method for a digital audio track circuit of a signal system.
The aim of the invention can be achieved by the following technical scheme:
According to a first aspect of the present invention there is provided a simulation apparatus for a digital audio track circuit of a signalling system, the apparatus comprising an AF-904 simulator operable to simulate a plurality of real AF-904 devices simultaneously, the AF-904 simulator comprising:
the communication module is used for communicating with other systems;
The analysis and processing module is used for completing information generation, coding, modulation and demodulation;
The man-machine interaction module is used for providing a visual interface;
and the fault injection module is used for realizing fault injection of various scenes.
As a preferable technical scheme, the communication module comprises an RS485 interface for realizing communication between the AF-904 simulator and the T-MLK system and a network interface for realizing communication between the AF-904 simulator and the Track simulator.
As a preferable technical scheme, the fault injection module comprises fault injection for detecting an occupied state of a train sent to the T-MLK system and fault injection for locomotive signals sent to a vehicle.
According to a second aspect of the present invention, there is provided a method of using the simulation apparatus for a digital audio track circuit of a signalling system as claimed in claim 1, the method comprising a simulation of a message sent by an AF-904 simulator to a T-MLK system, a simulation of a positive line segment track occupancy detection by the AF-904 simulator and a simulation of a locomotive signal transmission by the AF-904 simulator.
As a preferred technical solution, the simulation process of the message sent by the AF-904 simulator to the T-MLK system includes the following steps:
Step S101: transmitting the digital coding information to the track uninterruptedly through the communication module, and monitoring the signal sensed by the receiver;
Step S102: message analysis is carried out through an analysis and processing module, and the starting code direction FCP and the zone speed limit BSK information are accurately analyzed;
Step S103: the information is analyzed by an analysis and processing module, and TrackStatus information is accurately analyzed;
Step S104: and displaying the interface provided by the man-machine interface module.
As a preferred technical solution, in step S104, the support is respectively modifying FCP, BSK, trackStatus fields, and if the tester modifies the FCP or BSK or TrackStatus values, the fault injection module is supported to send the modified values to the T-MLK system through the communication module; if the tester does not modify the FCP or BSK or TrackStatus values, the communication module directly sends the analysis and processing module values to the T-MLK system.
As a preferred technical solution, the simulation process of the AF-904 simulator for detecting the occupation of the track in the positive line section includes the following steps:
Step S201: transmitting the digital coding information to the track uninterruptedly through the communication module, and monitoring the signal sensed by the receiver;
step S202: carrying out message analysis through an analysis and processing module, if the signal level value is judged to be lower than the threshold value, entering a step S203, otherwise returning to the step S201;
Step S203: the analysis and processing module is used for further judging that the track circuit is occupied if the track ID number is correct; if the track ID number is wrong, train detection 'occupied' information is still transmitted to the T-MLK system according to the fault guiding safety principle.
As a preferable technical solution, the simulation process of the AF-904 simulator for transmitting the cab signal specifically includes:
step S301: receiving serial information from the T-MLK system through the communication module;
Step S302: the information analysis is carried out through the analysis and processing module to obtain direction information, track frequency, feasible distance, line speed and target distance information, and then the track section information is added to form composite information; then, the composite information is encoded by using an NRZI format to form a message frame;
Step S303: and displaying the interface provided by the man-machine interface module.
As a preferred embodiment, the track section information in step S302 includes a track circuit ID number and a line speed.
As a preferred technical solution, in step S303, the support performs field modification on Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed pieces of information, and if the tester modifies the value of Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed, the fault injection module supports sending the modified value to the Track simulator through the communication module via the network;
If the tester does not modify Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed the values, the communication module directly sends the values of the analysis and processing module to the Track simulator over the network.
According to a third aspect of the present invention there is provided an electronic device comprising a memory and a processor, the memory having stored thereon a computer program, the processor implementing the method when executing the program.
According to a fourth aspect of the present invention there is provided a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the method.
Compared with the prior art, the invention has the following advantages:
1) The AF-904 simulator of the present invention supports TBTC indoor testing of the signaling system, and transmits commands such as target speed, target distance, and line speed to the vehicle in TBTC mode to perform the cab signaling function. The AF-904 simulator can completely realize the function of real AF-904 equipment, and the AF-904 simulator is used for replacing the real equipment in the indoor test, so that the cost and time cost for building the test environment equipment in the indoor test are reduced.
2) The AF-904 simulator of the present invention supports multi-node communication by configuration. One real AF-904 cage manages a maximum of 4 sectors, while one AF-904 simulator can simulate multiple AF-904 devices simultaneously, as shown in FIG. 7, one AF-904 simulator simulates 3 AF-904 cages simultaneously, managing 12 sectors. The invention provides a simulation environment for indoor performance test.
3) The human-computer interface provided by the AF-904 simulator can realize fault injection of interface data packets, including fault injection of train detection occupancy state sent to a T-MLK system and fault injection of locomotive signals sent to a vehicle; the flexibility of the test and the integrity of the coverage of the test scene are improved.
Drawings
FIG. 1 is a schematic diagram of the present invention for a signal testing system;
FIG. 2 is a schematic diagram of the functional blocks of the AF-904 simulator;
FIG. 3 is a flow chart of a message sent by the AF-904 simulator to the T-MLK system;
FIG. 4 is a flow chart of the AF-904 simulator implementing the positive line segment track occupancy detection function;
FIG. 5 is a flow chart of an AF-904 simulator implementing a cab signal transmission function;
FIG. 6 is a schematic diagram of a T-MLK system management AF-904;
FIG. 7 is a configuration example of communication of AF-904 simulator 1 with the com1 serial port of the T-MLK system;
FIG. 8 is a human interface Device Id drop down box provided by the AF-904 simulator;
FIG. 9 is a human-machine interface Type Name drop-down box provided by the AF-904 simulator;
FIG. 10 is a diagram of a human-machine interface provided by an AF-904 simulator that can support fault injection interfaces for FCPs in AF904ToTMLK messages;
FIG. 11 is a diagram of a human-machine interface provided by an AF-904 simulator that can support the fault injection interface of TrackStatus in the AF904ToTMLK message;
FIG. 12 is a diagram of a human-machine interface provided by an AF-904 simulator that can support fault injection interfaces for BSK in AF904ToTMLK messages;
FIG. 13 is a diagram illustrating a fault injection interface that may support the Direction in TrackInfo messages provided by the AF-904 simulator;
FIG. 14 is a diagram of a human-machine interface provided by an AF-904 simulator that can support the fault injection interface of NextFrequenceIndex in TrackInfo messages;
FIG. 15 is a diagram of a human-machine interface provided by an AF-904 simulator that can support the fault injection interface of DistancetoGo in TrackInfo messages;
FIG. 16 is a diagram of a human-machine interface provided by an AF-904 simulator that can support the fault injection interface of LINESPEED in TrackInfo messages;
FIG. 17 is a human-machine interface provided by the AF-904 simulator that can support the fault injection interface of TARGETSPEED in TrackInfo messages.
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 signal testing system shown in fig. 1 is mainly divided into a tested system and an analog system. The tested system is divided into a vehicle-mounted system and a track side system.
The vehicle-mounted system is mainly responsible for train positioning, train displacement and speed measurement, overspeed protection, management of vehicle doors and shielding doors, automatic driving and other functions;
The track side system mainly comprises a ZC zone controller which is responsible for automatic protection of a train and calculation of mobile authorization; an LC line controller responsible for managing the temporary speed limit and ATC data version; ATS train automatic monitoring responsible for supervising and controlling operation of the train; MSS maintenance support system for monitoring running state and fault information of equipment; the CI computer interlocking system is responsible for collecting and driving states of trackside equipment such as track circuits, turnouts, annunciators and the like; and a T-MLK system responsible for performing all of the speed control logic functions and for sending these speed information to the AF-904 digital audio track circuitry.
As shown in FIG. 2, the present invention is a simulated analog device for a digital audio track circuit of a signaling system. Comprising the following steps: the system comprises a communication module, an information analysis and processing module, a man-machine interaction module, a fault injection module and other 4-big-function modules.
The communication module of the present invention enables communication with other systems. The AF-904 simulator is communicated with the T-MLK system through a special protocol of an RS485 interface, and the AF-904 simulator is communicated with the Track simulator through a network.
The analysis and processing module of the invention is responsible for completing the functions of information generation, coding, modulation, demodulation and the like.
The man-machine interaction module provides an interface, and a visual interface is provided for manual operation and monitoring.
The fault injection module of the invention can respectively support the fault injection of the message sent by the AF-904 simulator to the T-MLK system and the message sent by the AF-904 simulator to the Track simulator;
FIG. 3 is a flow chart of a message sent by the AF-904 simulator of the present invention to the T-MLK system. The method comprises the following steps:
Step S101: transmitting the digital coding information to the track uninterruptedly through the communication module, and monitoring the signal sensed by the receiver;
Step S102: message analysis is carried out through an analysis and processing module, and the starting code direction FCP and the zone speed limit BSK information are accurately analyzed;
step S103: and the information is correctly analyzed TrackStatus by analyzing and processing the information through an analysis and processing module.
Step S104: the interface display provided by the man-machine interface module can support to modify FCP, BSK, trackStatus fields respectively, and if a tester modifies the value of FCP or BSK or TrackStatus, the fault injection module supports to send the modified value to the T-MLK system through the communication module. If the tester does not modify the FCP or BSK or TrackStatus values, the communication module directly sends the analysis and processing module values to the T-MLK system.
FIG. 4 is a flow chart of the function of the AF-904 simulator of the present invention to implement the positive line segment track occupancy detection. Comprises the following steps:
Step S201: transmitting the digital coding information to the track uninterruptedly through the communication module, and monitoring the signal sensed by the receiver;
step S202: carrying out message analysis by an analysis and processing module, and if the signal level value is judged to be lower than the threshold value, entering step S203;
step S203: the information analysis and processing module is used for further judging that the track circuit is occupied if the track ID number is correct; if the track ID number is wrong, train detection 'occupied' information is still transmitted to the T-MLK system according to the fault guiding safety principle.
FIG. 5 is a flow chart of the AF-904 simulator of the present invention implementing the cab signal transmission function. Comprises the following steps:
step S301: receiving serial information from the T-MLK system through the communication module;
Step S302: the analysis and processing module is used for carrying out message analysis (obtaining direction information, track frequency, feasible distance, line speed, target distance and the like), and then adding the track section information (track circuit ID number, line speed and the like) to form composite information; then, the composite information is encoded by using an NRZI format to form a message frame;
Step S303: the interface display provided by the man-machine interface module can support field modification of Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed information respectively, and if a tester modifies Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed value, the fault injection module supports the modified value to be sent to the Track simulator through a communication module through a network. If the tester does not modify Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed the values, the communication module directly sends the values of the analysis and processing module to the Track simulator over the network.
A real AF-904 system manages a maximum of 4 sectors, while an AF-904 simulator can simulate multiple AF-904 devices simultaneously, as shown in FIG. 6, a T-MLK system has 3 serial ports, including com1, com2, and com3. One serial port runs one AF-904 simulator, which can replace 3 real AF-904 devices simultaneously while managing 12 track segments. The test cost of building the indoor test environment is greatly saved.
As shown in fig. 7, which shows a configuration example of the AF-904 simulator 1, communication with the com1 serial port of the T-MLK system can be realized according to the actual project track section address configuration;
The human-machine interface provided by the AF-904 simulator may support fault injection of messages sent by the AF-904 to the T-MLK system. On the human-machine interface, as shown in fig. 8, a track section Id to be modified is selected in the Device Id drop-down box; as shown in fig. 9, the Type Name drop-down box selects the message Type to be modified, and selects AF904ToTMLK; as shown in FIG. 10, the FCP value is modified on the small window popped up by the right key FCP, and OK is clicked to realize fault injection of the FCP value in the message sent by AF-904 to the T-MLK system. As shown in fig. 11, the small window popped up by the right key TrackStatus is forcedly set to send "1" or "0", and the train "idle" or "occupied" information is transmitted to the T-MLK system, so as to implement fault injection for detecting the occupied state of the train; as shown in fig. 12, the widget popped up by the right key BSK is forcedly set to send "1" or "0", and simulates the state of "not activated" or "activated" of the section speed limit button, so as to implement fault injection of the state of the section speed limit button.
The human-machine interface provided by the AF-904 simulator may support fault injection of cab signal messages sent by the AF-904 to the vehicle. On a human-computer interface, selecting a track section ID to be modified from a Device Id drop-down frame, selecting TrackInfo from a Type Name drop-down frame, modifying a Direction value on a small window popped up by a right key Direction, and clicking OK to realize fault injection of the Direction value in an AF-904 sent vehicle-mounted message, as shown in FIG. 13. As shown in FIG. 14, the right key NextFrequenceIndex pops up a small window to modify NextFrequenceIndex values and clicks OK to implement fault injection of the AF-904 to the NextFrequenceIndex value in the in-vehicle message. As shown in FIG. 15, the right key DistancetoGo pops up a small window to modify DistancetoGo values and clicks OK to implement fault injection of the AF-904 to the DistancetoGo value in the in-vehicle message. As shown in FIG. 16, the right key LINESPEED pops up a small window to modify LINESPEED values and clicks OK to implement fault injection of the AF-904 to the LINESPEED value in the in-vehicle message. As shown in FIG. 17, the right key TARGETSPEED pops up a small window to modify TARGETSPEED values and clicks OK to implement fault injection of the AF-904 to the TARGETSPEED value in the in-vehicle message.
The foregoing description of embodiments of the apparatus and method further describes aspects of the present invention in terms of embodiments of an electronic device and a storage medium.
The embodiment of the present invention also provides an electronic device including a Central Processing Unit (CPU) that can perform various appropriate actions and processes according to computer program instructions stored in a Read Only Memory (ROM) or computer program instructions loaded from a storage unit into a Random Access Memory (RAM). In the RAM, various programs and data required for the operation of the device can also be stored. The CPU, ROM and RAM are connected to each other by a bus. An input/output (I/O) interface is also connected to the bus.
A plurality of components in a device are connected to an I/O interface, comprising: an input unit such as a keyboard, a mouse, etc.; an output unit such as various types of displays, speakers, and the like; a storage unit such as a magnetic disk, an optical disk, or the like; and communication units such as network cards, modems, wireless communication transceivers, and the like. The communication unit allows the device to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processing unit performs the various methods and processes described above, such as the inventive method. For example, in some embodiments, the inventive methods may be implemented as a computer software program tangibly embodied on a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and/or installed onto the device via the ROM and/or the communication unit. One or more of the steps of the method of the invention described above may be performed when the computer program is loaded into RAM and executed by a CPU. Alternatively, in other embodiments, the CPU may be configured to perform the methods of the present invention by any other suitable means (e.g., by means of firmware).
The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a system on a chip (SOC), a Complex Programmable Logic Device (CPLD), and the like.
Program code for carrying out methods of the present invention may be written in any combination of one or more programming languages. These program code may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus such that the program code, when executed by the processor or controller, causes the functions/operations specified in the flowchart and/or block diagram to be implemented. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
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 (12)
1. A simulated simulation apparatus for a digital audio track circuit of a signal system, the apparatus comprising an AF-904 simulator operable to simulate a plurality of real AF-904 devices simultaneously, the AF-904 simulator comprising:
the communication module is used for communicating with other systems;
The analysis and processing module is used for completing information generation, coding, modulation and demodulation;
The man-machine interaction module is used for providing a visual interface;
and the fault injection module is used for realizing fault injection of various scenes.
2. The emulation simulation apparatus for a digital audio Track circuit of a signal system according to claim 1, wherein the communication module comprises an RS485 interface for enabling communication between the AF-904 simulator and the T-MLK system, and a network interface for enabling communication between the AF-904 simulator and the Track simulator.
3. A simulation device for a digital audio track circuit of a signaling system according to claim 1, wherein the fault injection module comprises a fault injection to the train detection occupancy status of the T-MLK system and a fault injection to the on-board locomotive signal.
4. A method of using the emulation simulation apparatus for a digital audio track circuit of a signaling system as claimed in claim 1, the method comprising the simulation of a message sent by an AF-904 simulator to a T-MLK system, the simulation of a positive line segment track occupancy detection by the AF-904 simulator and the simulation of a locomotive signal transmission by the AF-904 simulator.
5. The method of claim 4, wherein the simulation of the message sent by the AF-904 simulator to the T-MLK system comprises the steps of:
Step S101: transmitting the digital coding information to the track uninterruptedly through the communication module, and monitoring the signal sensed by the receiver;
Step S102: message analysis is carried out through an analysis and processing module, and the starting code direction FCP and the zone speed limit BSK information are accurately analyzed;
Step S103: the information is analyzed by an analysis and processing module, and TrackStatus information is accurately analyzed;
Step S104: and displaying the interface provided by the man-machine interface module.
6. The method according to claim 5, wherein in step S104, the field is modified FCP, BSK, trackStatus, and if the tester modifies the FCP or BSK or TrackStatus value, the fault injection module supports sending the modified value to the T-MLK system through the communication module; if the tester does not modify the FCP or BSK or TrackStatus values, the communication module directly sends the analysis and processing module values to the T-MLK system.
7. The method of claim 4, wherein the simulating of the AF-904 simulator for positive line segment track occupancy detection comprises the steps of:
Step S201: transmitting the digital coding information to the track uninterruptedly through the communication module, and monitoring the signal sensed by the receiver;
step S202: carrying out message analysis through an analysis and processing module, if the signal level value is judged to be lower than the threshold value, entering a step S203, otherwise returning to the step S201;
Step S203: the analysis and processing module is used for further judging that the track circuit is occupied if the track ID number is correct; if the track ID number is wrong, train detection 'occupied' information is still transmitted to the T-MLK system according to the fault guiding safety principle.
8. The method of claim 4, wherein the simulating of the transmission of the cab signal by the AF-904 simulator specifically comprises:
step S301: receiving serial information from the T-MLK system through the communication module;
Step S302: the information analysis is carried out through the analysis and processing module to obtain direction information, track frequency, feasible distance, line speed and target distance information, and then the track section information is added to form composite information; then, the composite information is encoded by using an NRZI format to form a message frame;
Step S303: and displaying the interface provided by the man-machine interface module.
9. The method of claim 8, wherein the present track section information in step S302 includes a track circuit ID number and a line speed.
10. The method according to claim 8, wherein in step S303, field modification is supported on Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed information, and if the tester modifies Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed value, the fault injection module supports sending the modified value to the Track simulator via the communication module through the network;
If the tester does not modify Direction, nextFrequenceIndex, distancetoGo, lineSpeed, targetSpeed the values, the communication module directly sends the values of the analysis and processing module to the Track simulator over the network.
11. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program, characterized in that the processor, when executing the program, implements the method of any of claims 4-10.
12. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 4-10.
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