Method and device for simulating switch object controller interface for TACS system

Abstract

The present invention relates to a method and device for simulating a turnout object controller interface for a TACS system, the method comprising: step S1, starting and initializing from the top level of the verification system in sequence; step S2, establishing a vehicle-to-vehicle communication TACS mode to ensure normal communication between each subsystem; step S3, the automatic train monitoring system ATS performs a turnout position change operation, and performs a reverse operation on the turnout positioning in the default state; step S4, the turnout control board card PDDM sends a turnout reverse operation driving current to a relay box to simulate the reverse operation process of a real switch machine coil; step S5, in the TACS mode, the turnout position change operation is performed by the automatic train monitoring system ATS, and a fixed operation operation is performed on the turnout reverse position in the current state; step S6, the turnout control board card PDDM sends a turnout fixed operation driving current to a relay box to simulate the fixed operation process of a real switch machine coil. Compared with the prior art, the present invention has the advantages of realizing the simulation of the dynamic action process of the switch machine, etc.

Description

Technical Field

[0001] The invention relates to a TACS system, and in particular to a method and device for simulating a turnout object controller interface for a TACS system. Background Art

[0002] TACS (Train Autonomous Operation System Based on Train-to-Train Communication) uses OC object controller based on full electronic technology to control trackside resources, such as signal machines, turnouts, platform doors, etc. OC object controller uses different OC control boards for different control objects, such as VIIB, VOOB, SIOM, PSDC, SDDM and PDDM boards. The general control interface voltage of general OC control boards is 24VDC, 110VDC / AC digital switch quantity. For the control of turnout switch machines, the PDDM board drives the 380V three-phase AC high voltage of the switch machines.

[0003] As the OC object controller of the TACS system, before the TACS system is opened on the rail transit line, it is necessary to conduct a large number of integration tests with the TACS system indoors to verify the functional interface between the OC object controller and other subsystems of the TACS system, to ensure that it can correctly receive and process the message instructions of the resource controller (WRC) in the TACS system, execute correct object control and receive and process the correct object state. For objects with 24VDC and 110VDC interfaces, universal simulation and simulation can be performed indoors, but for the interface simulation of the 380V three-phase high voltage of the OC-PDDM board, it is also necessary to realize the simulation of the phase current logic of the three-phase motor coil inside the switch machine. It is difficult to simulate the switch machine interface circuit and the internal three-phase current logic using ordinary switch quantity relay interfaces. Due to limitations in the laboratory, such as site and power supply, it is even more impossible to use multiple switch machines to connect and test directly with the OC-PDDM board indoors. There is no effective simulation verification method and device for OC-PDDM interface simulation in the industry, which makes it impossible to carry out system integration and verification for subway projects using OC-PDDM. The specific problems are as follows:

[0004] 1. Simulation of the switch machine drive interface voltage. The switch machine is a high-voltage and strong electrical equipment with high working voltage and large starting current. Ordinary interface simulation methods and devices are difficult to achieve the "resource minimization and function maximization" goal of TACS system integration.

[0005] 2. Simulation of strong current analog quantity. Traditional signal system interface simulation can realize the simulation of weak current analog quantity and the simulation of switch quantity of a certain voltage, but it is difficult to support the simulation and accurate simulation of high-intensity current analog quantity, and is not enough to meet the PDDM board card simulation conditions for the switch machine interface.

[0006] 3. Accurate logic simulation of the three-phase coil inside the switch machine motor. In the process of directly controlling the switch machine, PDDM needs to continuously detect the current state of the three-phase coil inside the switch machine motor to determine the working state of the switch machine. It is difficult for general interface simulation devices to dynamically adjust the coil current and voltage simulation according to the PDDM control detection instructions, and cannot meet the switch machine interface simulation requirements of the PDDM board.

[0007] 4. Volume limitation of the simulation device. Since the simulation device needs to simulate the internal logic of the switch machine and perform indoor integration testing of the PDDM interface, the volume design of the simulation device needs to minimize the volume and maximize the function without affecting the verification function.

[0008] After searching the Chinese patent publication number CN114089719A, a vehicle signal interface simulation verification method and device for TACS system is disclosed. Specifically, through software development and modeling, the line running operation of the vehicle can be simulated. During the running process, the speed signal of the vehicle's speed sensor, the second-generation European beacon positioning signal, various signals and vehicle IO code position signals are fully simulated, but the interface simulation of the turnout object controller is not involved, especially the above-mentioned problems cannot be solved. Summary of the invention

[0009] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a method and device for simulating the switch object controller interface for a TACS system.

[0010] The purpose of the present invention can be achieved by the following technical solutions:

[0011] According to a first aspect of the present invention, a method for simulating a switch object controller interface for a TACS system is provided, the method comprising the following steps:

[0012] Step S1, starting from the top level of the verification system, power on and initialize the trackside resource controller WRC, the automatic train monitoring system ATS, the switch, the turnout control board PDDM, the switch machine simulation relay box, the programmable logic controller PLC and the line simulator LineSim in sequence;

[0013] Step S2, establishing a vehicle-to-vehicle communication TACS mode to ensure normal communication between subsystems;

[0014] Step S3, the automatic train monitoring system ATS performs a turnout change operation and performs a reverse operation on the turnout positioning in the default state;

[0015] Step S4, the turnout control board PDDM sends the turnout reverse operation driving current to the relay box, and the relay box simulates the real switch machine coil to perform the reverse operation process;

[0016] Step S5, in the TACS mode, the turnout position change operation is performed through the automatic train monitoring system ATS, and the fixed operation is performed on the turnout reverse position in the current state;

[0017] Step S6, the turnout control board PDDM sends the turnout fixed operation drive current to the relay box, and the relay box simulates the real switch machine coil to perform the fixed operation process.

[0018] As a preferred technical solution, the reverse operation in step S3 is transmitted to the trackside resource controller WRC through the switch. After internal calculation, the trackside resource controller WRC sends a trackside control instruction to the object controller, instructing the turnout control board PDDM to execute the turnout reverse control.

[0019] As a preferred technical solution, the relay box in step S4 simulates the real switch machine coil to perform the reverse operation process specifically as follows:

[0020] After the three-phase electricity of the reverse operation driving current is connected, each of the three-phase circuits is formed through the switch machine motor coils simulated by the windings, simulating the real switch machine coils to perform the reverse operation process.

[0021] As a preferred technical solution, the fixed operation in step S5 is transmitted to the trackside resource controller WRC through the switch. After internal calculation, the trackside resource controller WRC sends the trackside control instruction to the object controller, so that the turnout control board PDDM executes the turnout fixed operation control.

[0022] As a preferred technical solution, the relay box in step S6 simulates the real switch machine coil to perform the fixed operation process specifically as follows:

[0023] After the three-phase electricity of the fixed operation driving current is connected, each phase passes through the switch machine motor coil simulated by the winding to form a three-phase circuit, simulating the real switch machine coil to perform the fixed operation process.

[0024] According to a first aspect of the present invention, there is provided a device using the switch object controller interface simulation method for a TACS system, the device comprising a QPLC, a relay box, a relay, a diode, a resistor, a winding and a switch control board card PDDM, wherein the relay, the diode, the resistor and the winding are installed in the relay box;

[0025] The QPLC is connected to the diode, the resistor and the winding respectively through the relay, and the diode, the resistor and the winding are connected to the turnout control board card PDDM respectively.

[0026] As a preferred technical solution, the QPLC includes a CPU module, a power module, an input module QX42 module, an output module QY42P and a connection board;

[0027] The input module QX42 module realizes the object controller's collection of 380V drive power for the switch machine; realizes the switch machine action process through the PLC internal delay relay logic, and then drives the 24V relay to close or open through the output module QY42P, switches the 380V fixed operation or reverse operation drive circuit to a fixed meter or reverse meter indication circuit so that the switch control board PDDM obtains indication power; and feeds back the indication status of the switch fixed meter or reverse meter to the line simulator LineSim.

[0028] As a preferred technical solution, the relay includes two 380V relays and two 24V relays, wherein the 380V relay realizes the collection of fixed operation or reverse operation driving electricity, and the 24V relay simulates the on-off switch of the automatic switch inside the switch machine to switch the 380V fixed operation or reverse operation driving circuit to a 110V fixed meter or reverse meter display circuit.

[0029] As a preferred technical solution, the diode realizes the half-wave rectification and output 110V single-phase electricity function of the fixed meter or reverse meter indication circuit.

[0030] As a preferred technical solution, the resistor realizes the load voltage dividing function of the turnout indicating circuit.

[0031] As a preferred technical solution, the winding adopts a 30Ω / 50W glazed winding with high temperature resistance, and the glazed winding simulates the internal resistance of the switch machine motor coil.

[0032] As a preferred technical solution, the turnout control board card PDDM realizes the functions of driving the switch machine and collecting the reverse position of the switch machine.

[0033] According to a third aspect of the present invention, there is provided an electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the method described above is implemented when the processor executes the program.

[0034] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein the program implements the method described when executed by a processor.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] 1. Use static simulation method to simulate the dynamic action process of the switch machine. This method does not require the real dynamic action process of the switch machine to verify the function of the PDDM board. It uses PLC, relay and winding combination to respond to the operation command of the PDDM board in real time, and statically simulates the process of the change of the coil current in the motor when the switch machine moves, so as to meet the PDDM acquisition and drive interface function simulation.

[0037] 2. The simulation device has a simple structure, multiple simulation points, and complete functionality. The main body of the device uses a 3U box shell, relays, and windings to simulate the complex motor current logic inside the switch machine. Compared with the real switch machine, the structure is simple. A set of 3U relay boxes can simulate 4 switch machines respectively, truly minimizing resource consumption and maximizing functionality.

[0038] 3. The simulation parameters are simple to set, and the simulation characteristics are wide in range. The device uses PLC to precisely control the internal current sequence simulation when the switch is in motion. It can dynamically adjust special scenarios such as the turnout reverse position action time and the switch not rotating in place according to actual needs. It can achieve full-scale simulation of the switch action, and achieve flexible and sufficient verification of the robustness characteristics of the OC-PDDM board itself.

[0039] 4. The biggest feature of the TACS system is the flexible control of trackside resources (signals, switches, etc.). The simulation verification method and device are applied to the rail transit TACS signal system to integrate and verify the functions of the TACS large system, especially the trackside resource controller WRC and the trackside object controller based on the full electronic interlocking technology. Deeply integrated functional verification can be achieved, providing a flexible and efficient verification method to ensure the trackside resource control part of the TACS system. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0041] Figure 2 It is a data flow chart of each module of the present invention;

[0042] Figure 3 It is the internal circuit diagram of the relay box of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0044] like Figure 2 As shown in the figure, a method for simulating the switch object controller interface applied to the TACS system is presented. The technical solution includes the following steps:

[0045] Step S101, from the top level of the verification system, power on and initialize the TACS trackside resource controller WRC, the automatic train dispatching system ATS, the switch, the OC cabinet where the turnout control board PDDM is located, the switch machine simulation relay box, the programmable logic controller PLC and the line simulator LineSim software.

[0046] Step S102, establishing a vehicle-to-vehicle communication TACS mode to ensure normal communication between subsystems.

[0047] Step S103, in TACS mode, the turnout position change operation is manually performed through the automatic train monitoring system ATS, and the reverse operation is performed on the turnout position in the default state. The reverse operation is transmitted to the trackside resource controller WRC through the switch. After internal calculation, the WRC sends the trackside control instruction to the object controller, instructing the turnout control board PDDM to perform the turnout reverse control.

[0048] Step S104, the PDDM board sends the turnout reverse driving current to the relay box. The internal schematic diagram of the relay box is as follows: Figure 3 As shown. The three-phase reverse current is input from x1-B, x3-B, and x4-B, and forms a three-phase circuit through the simulated switch machine motor coil of windings ①②③, simulating the reverse operation process of the real switch machine coil. At this time, the 380-1 relay ④ is energized, and the 380V reverse operation command is converted into a 24V DC signal and sent to the PLC. After receiving the reverse operation command, the PLC confirms that the switch machine has been turned to the reverse position after the internally set switch machine operation time t0, and sends a reverse signal to the 24-1 relay ⑥ and the 24-2 relay ⑦, so that the two relays are energized. Figure 3 The four switches shown are changed, forming an inverted circuit.

[0049] Step S105, in TACS mode, the turnout position change operation is manually performed through the automatic train dispatching system ATS, and the fixed operation is performed on the turnout reverse position in the current state. The fixed operation is transmitted to the trackside resource controller WRC through the switch. After internal calculation, the WRC sends the trackside control instruction to the object controller, instructing the turnout control board PDDM to perform the turnout fixed operation control.

[0050] Step S106, the PDDM board sends the switch fixed operation drive power to the relay box. The internal schematic diagram of the relay box is as follows: Figure 3As shown. The three-phase fixed operation current is input from x1-B, x2-B, and x5-B, and forms a three-phase circuit through the winding simulation of the switch machine motor coil, simulating the real switch machine coil to perform the fixed operation process. At this time, the 380-2 relay ⑤ is energized, and the 380V fixed operation command is converted into a 24V DC signal and sent to the PLC. After receiving the fixed operation command, the PLC confirms that the switch machine has been turned to the position after the internally set switch machine operation time t0, and sends a fixed signal to the 24-1 relay ⑥ and the 24-2 relay ⑦, so that the two relays are energized. Figure 3 The four switches shown are changed again to the default state shown in the figure, and now constitute a fixed meter circuit.

[0051] The above is an introduction to a method embodiment. The following is a further explanation of the solution of the present invention through an apparatus embodiment.

[0052] like Figure 1 The following is the schematic diagram of the structure of the switch machine object controller interface simulation device for realizing the rail transit TACS signal system:

[0053] The whole device is mainly composed of QPLC, relay box, relay, diode, resistor, winding, OC-PDDM board, etc.

[0054] QPLC: Mitsubishi Q series PLC is used. The PLC components are composed of CPU module (1 piece), power module (1 piece), input module QX42 module (1 piece), output module QY42P (1 piece), connection board (1 piece), etc. The QX42 module is mainly used to realize the collection of OC's 380V driving power for the switch machine; the switch machine action process is realized through the internal delay relay logic of the PLC, with a delay of 5s in this device, and then the QY42P output module drives the 24V relay to close / open to switch the 380V fixed / reverse operation drive circuit to the fixed meter / reverse meter indication circuit so that the OC-PDDM can obtain the indication power; the indication status of the turnout fixed meter / reverse meter is fed back to the line simulator LineSim software;

[0055] Relay box: mainly integrates windings, resistors, relays, diodes and other devices, and connects them to the external QPLC and OC-PDDM through connectors. Among them, 9 windings, every 3 windings simulate a motor coil, and the 3 groups of windings are connected in star shape; the coils of the 2 380V relays are respectively connected to the 3 / 4 and 2 / 5 input lines of the five-wire system, and the normally open contacts are respectively connected to the input contacts X0 and X1 of the PLC input module QX42; the normally open contacts of the 24V relay are respectively connected in series in the indicating electrical circuit, and the coil contacts are connected to the Y0 and Y1 contacts of the PLC output module QY42P; the 4 resistors are connected in parallel and then in series to ensure the stability of the circuit shunt; the relay box will integrate the external wiring into the connector, and connect to the QPLC and OC-PDDM through the connector;

[0056] Relay: The relays are divided into 2 380V relays and 2 24V relays. The 380V relay realizes the collection of fixed / reverse operation driving electricity, and the 24V relay simulates the on-off switch of the automatic switch inside the switch machine to switch the 380V fixed / reverse operation driving circuit to the 110V fixed meter / reverse meter indication circuit; the coils of the two 380V relays are respectively connected to the 3 / 4 and 2 / 5 input lines of the five-wire system, and the normally open contacts are respectively connected to the input contacts X0 and X1 of the PLC input module QX42; the normally open contacts of the 24V relay are respectively connected in series in the indication circuit, and the coil contacts are connected to the Y0 and Y1 contacts of the PLC output module QY42P;

[0057] Diode: realizes the half-wave rectification and output 110V single-phase electricity function of the fixed meter / reverse meter indication circuit;

[0058] Resistors: 300Ω common resistors are used, mainly to realize the load voltage division function of the turnout indication circuit;

[0059] Winding: Adopt high temperature resistant 30Ω / 50W glazed winding, which simulates the internal resistance of the switch motor coil and can withstand the flow of 380V driving power for 10S;

[0060] OC-PDDM board: TACS system OC board for controlling switch machines, realizing the functions of driving switch machines and collecting switch machine reverse position.

[0061] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described module can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0062] The electronic device of the present invention includes a central processing unit (CPU), which can perform various appropriate actions and processes according to computer program instructions stored in a read-only memory (ROM) or loaded from a storage unit into a random access memory (RAM). In the RAM, various programs and data required for device operation can also be stored. The CPU, ROM and RAM are connected to each other via a bus. An input / output (I / O) interface is also connected to the bus.

[0063] Multiple components in the device are connected to the I / O interface, including: input units, such as keyboards, mice, etc.; output units, such as various types of displays, speakers, etc.; storage units, such as disks, optical disks, etc.; and communication units, such as network cards, modems, wireless communication transceivers, etc. The communication unit allows the device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunication networks.

[0064] The processing unit performs the various methods and processes described above, such as methods S101 to S106. For example, in some embodiments, methods S101 to S106 may be implemented as a computer software program, which is tangibly contained in 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 on the device via a ROM and / or a communication unit. When the computer program is loaded into the RAM and executed by the CPU, one or more steps of methods S101 to S106 described above may be performed. Alternatively, in other embodiments, the CPU may be configured to execute methods S101 to S106 in any other appropriate manner (e.g., by means of firmware).

[0065] 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: field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), complex programmable logic devices (CPLDs), and the like.

[0066] The program code for implementing the method of the present invention can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code can be executed entirely on the machine, partially on the machine, partially on the machine as a stand-alone software package and partially on a remote machine, or entirely on a remote machine or server.

[0067] In the context of the present invention, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or equipment, or any suitable combination of the foregoing. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0068] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for simulating a turnout object controller interface for a TACS system, characterized in that: The method comprises the following steps: Step S1, starting from the top level of the verification system, power on and initialize the trackside resource controller WRC, the automatic train monitoring system ATS, the switch, the turnout control board PDDM, the switch machine simulation relay box, the programmable logic controller PLC and the line simulator LineSim in sequence; Step S2, establishing a vehicle-to-vehicle communication TACS mode to ensure normal communication between subsystems; Step S3, the automatic train monitoring system ATS performs a turnout change operation and performs a reverse operation on the turnout positioning in the default state; Step S4, the turnout control board PDDM sends the turnout reverse operation driving current to the relay box, and the relay box simulates the real switch machine coil to perform the reverse operation process; Step S5, in the train-to-train communication TACS mode, the turnout change operation is performed through the automatic train monitoring system ATS, and the fixed operation is performed on the turnout reverse position in the current state; Step S6, the turnout control board PDDM sends the turnout fixed operation driving current to the relay box, and the relay box simulates the real switch machine coil to perform the fixed operation process; The reverse operation in step S3 is transmitted to the trackside resource controller WRC through the switch, and the trackside resource controller WRC issues a trackside control instruction to the object controller after internal calculation, so that the turnout control board PDDM executes the turnout reverse operation control; The fixed operation in step S5 is transmitted to the trackside resource controller WRC through the switch. After internal calculation, the trackside resource controller WRC sends a trackside control instruction to the object controller, instructing the turnout control board PDDM to execute the turnout fixed operation control.

2. A method for simulating a turnout object controller interface for a TACS system according to claim 1, characterized in that: The relay box in step S4 simulates the real switch machine coil to perform the reverse operation process specifically as follows: After the three-phase electricity of the reverse operation driving current is connected, each of the three-phase circuits is formed through the switch machine motor coils simulated by the windings, simulating the real switch machine coils to perform the reverse operation process.

3. A method for simulating a turnout object controller interface for a TACS system according to claim 1, characterized in that: The relay box in step S6 simulates the real switch machine coil to perform the fixed operation process specifically as follows: After the three-phase electricity of the fixed operation driving current is connected, each phase passes through the switch machine motor coil simulated by the winding to form a three-phase circuit, simulating the real switch machine coil to perform the fixed operation process.

4. A device using the switch object controller interface simulation method for a TACS system as claimed in claim 1, characterized in that: The device comprises a QPLC, a relay box, a relay, a diode, a resistor, a winding and a turnout control board card PDDM, wherein the relay, the diode, the resistor and the winding are installed in the relay box; The QPLC is connected to the diode, the resistor and the winding respectively through the relay, and the diode, the resistor and the winding are connected to the turnout control board card PDDM respectively.

5. The device according to claim 4, characterized in that The QPLC includes a CPU module, a power module, an input module QX42 module, an output module QY42P and a connection board; The input module QX42 module realizes the object controller's collection of 380V drive power for the switch machine; realizes the switch machine action process through the PLC internal delay relay logic, and then drives the 24V relay to close or open through the output module QY42P, switches the 380V fixed operation or reverse operation drive circuit to a fixed meter or reverse meter indication circuit so that the switch control board PDDM obtains indication power; and feeds back the indication status of the switch fixed meter or reverse meter to the line simulator LineSim.

6. The device according to claim 4, characterized in that The relays include two 380V relays and two 24V relays, wherein the 380V relays realize the collection of fixed or reverse operation driving electricity, and the 24V relays simulate the on-off switch of the automatic switch inside the switch machine to switch the 380V fixed or reverse operation driving circuit to a 110V fixed meter or reverse meter display circuit.

7. The device according to claim 4, characterized in that The diode realizes the half-wave rectification and output 110V single-phase electricity function of the fixed meter or reverse meter indication circuit.

8. The device according to claim 4, characterized in that The resistor realizes the load voltage dividing function of the turnout indicating circuit.

9. The device according to claim 4, characterized in that The winding adopts a 30Ω / 50W glazed winding with high temperature resistance, and the glazed winding simulates the internal resistance of the switch machine motor coil.

10. The device according to claim 4, characterized in that The switch control board card PDDM realizes the functions of driving the switch machine and collecting the reverse position of the switch machine.

11. An electronic device comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the processor executes the program, the method according to any one of claims 1 to 3 is implemented.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 3 is implemented.

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