Method for controlling follow-up train running permission extension based on cross-voltage signal, train running control system, electronic equipment and storage medium

Abstract

The invention discloses a method for controlling follow-up train running permission extension based on cross-voltage signals, a train running control system, electronic equipment and a storage medium. The method is applied to radio block center equipment and comprises the steps that the running permission of a current train is controlled to extend into a target route, and the target route is a front train route handled by interlocking equipment for the current train; receiving position information sent by vehicle-mounted equipment of the current train, sending state information of a cross-voltage annunciator to interlocking equipment when judging that the position of the current train is about to enter a target route, and marking that the annunciator is being subjected to cross-voltage by the train; and within the preset duration after the marked signal machine is being subjected to cross pressure of the train, the running permission of the subsequent train is not allowed to extend into the target route. The method is used for solving the problem that a subsequent train mistakenly extends the running permission due to the fact that cross-voltage state information transmission or train signal state transmission by interlocking equipment is not timely.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a method for controlling the extension of subsequent train driving permission based on a cross-pressure signal, a train operation control system, an electronic device and a storage medium. Background Art

[0002] In station moving block systems, the interlocking equipment can use a fusion occupancy method to determine whether a section is free or occupied, which is used for interlocking logic judgment. To implement the station moving block tracking method, the interlocking equipment must issue an approach open signal to the following train when the leading train is on the approach route.

[0003] To provide the interlocking equipment with the accurate timing for closing the signal, the Radio Block Center (RBC) needs to provide the interlocking equipment with the status information of the train's cross-pressure signal. However, due to the possible communication delay between the interlocking equipment and the RBC, and in the case of short train lengths, if the interlocking equipment fails to receive the cross-pressure signal status information from the RBC in a timely manner, or the interlocking equipment fails to promptly feedback the train signal change status to the RBC, subsequent trains may mistakenly extend the driving permit into the route, thereby disrupting the operation plan and even posing safety risks.

[0004] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. Summary of the Invention

[0005] The purpose of the present invention is to provide a method, a train operation control system, an electronic device and a storage medium for controlling the extension of the driving permission of subsequent trains based on a cross-pressure signal, so as to solve the problem that the subsequent train driving permission is incorrectly extended due to the untimely transmission of cross-pressure status information or the interlocking device transmitting the train signal status.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] One aspect of the present invention provides a method for controlling the extension of subsequent train driving permission based on a cross-voltage signal, which is applied to radio block center equipment, comprising:

[0008] Controlling the extension of the driving permission of the current train to enter the target route, where the target route is the route of the preceding train processed by the interlocking device for the current train;

[0009] receiving position information sent by the onboard equipment of the current train, and when determining that the position of the current train is about to enter the target route, sending state information of the cross-pressure signal to the interlocking device, and marking that the signal is being cross-pressured by the train;

[0010] If the signal machine is marked as being pressed by the train for a preset time period, the state information of the pressed signal machine is continuously sent to the interlocking device.

[0011] Optionally, the method further comprises: if the signal machine is marked as being pressed by the train for a preset time period, marking the signal machine as not being pressed by the train and allowing the train operation permission of the subsequent train to extend into the target route.

[0012] Optionally, the preset time period is greater than at least the first time period and / or the second time period, the first time period being the time for the radio block center device to determine the communication interruption with the interlocking device, and the second time period being the time for the interlocking device to determine the communication interruption with the radio block center device.

[0013] Optionally, the preset time period is the sum of the first time period and the second time period.

[0014] Optionally, the state information of the pressed signal machine is continuously sent to the interlocking device for a preset time period after the signal machine is marked as being pressed by the train.

[0015] Optionally, the position of the current train is about to enter the target route, specifically, the minimum safety front end of the last period train of the current train is in the approach section of the target route, and the minimum safety front end of the current period train and the overhang distance enter the target route.

[0016] Another aspect of the present application provides a train operation control system, comprising an interlocking device, a radio block center device and a vehicle-mounted device, the radio block center device being in communication connection with the interlocking device and the vehicle-mounted device respectively;

[0017] The interlocking device is used to handle the target route in front of the current train.

[0018] The radio block center device is used to control the train operation permission of the current train to extend into the target route.

[0019] The vehicle-mounted device of the current train is used to send the position information of the current train to the radio block center device.

[0020] The radio block center device is further used to receive the position information sent by the vehicle-mounted device of the current train, send the state information of the pressed signal machine to the interlocking device when determining that the position of the current train is about to enter the target route, and mark the signal machine as being pressed by the train, and not allow the train operation permission of the subsequent train to extend into the target route for a preset time period after the signal machine is marked as being pressed by the train.

[0021] Optionally, the radio block center device is further configured to, if the signal is marked as being pressed by a train for a preset time length, mark the signal as not being pressed by a train and allow the train permission of a subsequent train to extend into the target route.

[0022] Optionally, the preset time length is greater than at least a first time length and / or a second time length, the first time length being a time length for the radio block center device to determine a communication interruption with the interlocking device, and the second time length being a time length for the interlocking device to determine a communication interruption with the radio block center device.

[0023] Optionally, the preset time length is a sum of the first time length and the second time length.

[0024] Optionally, the radio block center device is further configured to continuously send the state information of the pressed signal to the interlocking device within the preset time length after the signal is marked as being pressed by a train.

[0025] Optionally, the position of the current train is about to enter the target route, specifically, a minimum safety front end of a previous cycle train of the current train is in an approach section of the target route, and a minimum safety front end of a current cycle train and a consideration of a overhang distance enter the target route.

[0026] Optionally, within the preset time length after the signal is marked as being pressed by a train, if the interlocking device determines that a first section in the target route is idle in advance according to a fusion occupation state, and the state information of the pressed signal sent by the radio block center device is not received, the interlocking device determines to close the signal abnormally and determine the target route as unavailable in advance.

[0027] Another aspect of the present application also provides an electronic device, comprising a processor and a memory, the memory storing a computer program, the computer program being executed by the processor to implement the method described above.

[0028] Another aspect of the present application also provides a readable storage medium, the readable storage medium storing a computer program, the computer program being executed by a processor to implement the method described above.

[0029] The present application has at least the following technical effects:

[0030] The present application breaks through the traditional mode of controlling train permission only according to route state, takes the signal press state marked by the radio block center device as the core, and does not allow the train permission of a subsequent train to extend into the target route within a preset time length after the signal is marked as being pressed by a train, effectively avoiding the risk of a subsequent train mistakenly entering an occupied route due to communication delay or failure, and improving system availability and safety.

[0031] The application introduces the bidirectional communication interruption time threshold X and Y between the radio block center device and the interlocking device, covers the possible sequential one-side communication failure scenarios of the two-end devices by continuously sending the cross pressure signal machine state information for X+Y seconds, and accurately solves the signal state synchronization problem caused by communication problems.

[0032] The application also combines the active intervention mechanism of the interlocking device to form "double-end redundant control", the radio block center device continuously marks the cross pressure information, and the interlocking can abnormally close the signal in advance under certain conditions, realizes multi-dimensional protection, and improves the control reliability. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the description. Obviously, the drawings in the following description are an embodiment of the present application, and other drawings can be obtained by those skilled in the art without creating labor on the premise of the drawings:

[0034] Figure 1 The flowchart of the method for extending the subsequent train driving permission based on the cross pressure signal control provided by an embodiment of the present application is shown;

[0035] Figure 2 The flowchart of the method for extending the subsequent train driving permission based on the cross pressure signal control provided by another embodiment of the present application is shown;

[0036] Figure 3 The schematic diagram of the cross pressure route of the preceding train and the extension of the driving permission of the following train for multi-train tracking operation is shown;

[0037] Figure 4 The structural schematic diagram of the train operation control system provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0038] The scheme proposed by the present application will be further described in detail in combination with the drawings and specific embodiments. According to the following description, the advantages and characteristics of the present application will be more clear. It should be noted that the drawings are greatly simplified and all use non-precise proportions, only to facilitate, clear and assist the purpose of explaining the embodiments of the present application. In order to make the purpose, characteristics and advantages of the present application more obvious and easy to understand, please refer to the drawings. It should be noted that the structure, proportion, size and the like shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so that those skilled in the art can understand and read, and are not used to limit the limited conditions of the implementation of the present application, so they do not have the technical essence. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0039] As Figure 1 shown in the embodiment, a method for controlling extension of train running permission of a subsequent train based on a cross-pressure signal is provided, which is applied to a wireless block center device and includes the following steps:

[0040] Step S1, control extension of train running permission of a current train into a target route, the target route being a front train route handled by an interlocking device for the current train.

[0041] When a train with train running permission runs in a section or a station, the interlocking device handles a front train route (i.e. the target route) for the current train, and sends a route state as normal and a signal state as open to the wireless block center device. Then the wireless block center device can control extension of train running permission of the current train into the target route.

[0042] Step S2, receive position information sent by a vehicle-mounted device of the current train, and when judging that the position of the current train will enter the target route, send state information of a cross-pressure signal to the interlocking device, and mark that the signal is being crossed by a train.

[0043] The vehicle-mounted device of the current train will send position information to the wireless block center device in real time, and the wireless block center device will send state information of a cross-pressure signal to the interlocking device when judging that the current train will enter the target route, so as to make the interlocking device close the corresponding signal. Meanwhile, the wireless block center device will also mark locally that the signal is being crossed by a train, and when the signal has a mark of being crossed by a train, the formation permission of a subsequent train is not allowed to pass the signal, so as to realize that train running permission will not be extended incorrectly.

[0044] In one way of judging that the position of the current train will enter the target route, a last cycle minimum safety front end of the current train is in an approach section of the target route, and a current cycle minimum safety front end and a consideration of overhang distance enter the target route. In other embodiments, other ways of judging that the position of the current train will enter the target route can also be used.

[0045] Step S3, within a preset time length after marking that the signal is being crossed by a train, extension of train running permission of a subsequent train into the target route is not allowed.

[0046] The preset time length is set as the maximum time length of the marking duration, and the train operation permission of a subsequent train is not allowed to be extended into the target route within the preset time length. Thus, the embodiment breaks the traditional mode of controlling the train operation permission according to the route state only, takes the cross-pressure state of the marker signal as the core, and does not allow the train operation permission of a subsequent train to be extended into the target route within the preset time length after the marker signal is being crossed by the train, effectively avoids the risk of the subsequent train mistakenly entering the occupied route due to communication delay or failure, and improves the system availability and safety.

[0047] In addition, the wireless block center device continuously sends the state information of the crossed signal to the interlocking device within the preset time length after the marker signal is being crossed by the train. One purpose is to make the interlocking device receive the state information of the crossed signal as much as possible. After receiving the crossed information sent by the wireless block center device, the interlocking device can judge that the signal is normally closed under certain conditions, and the interlocking device can normally release the route after the signal is normally closed, thereby improving the availability. If the crossed information is not continuously sent to the interlocking device, the interlocking device may not receive the crossed information due to packet loss, which finally leads to abnormal closing of the signal and the route cannot be normally released, requiring manual intervention to release the route, thereby reducing the availability. Another purpose is to ensure safety. During the period when the wireless block center device sends the crossed information, even if the interlocking device does not timely receive the crossed information closing signal, the wireless block center device can control the train operation permission of a subsequent train to not mistakenly pass through the route.

[0048] Suppose that the time for the wireless block center device to judge the communication interruption with the interlocking device is X seconds (i.e., the wireless block center device does not receive any message from the interlocking device for more than X seconds), and the time for the interlocking device to judge the communication interruption with the wireless block center device is Y seconds (i.e., the interlocking device does not receive any message from the wireless block center device for more than Y seconds), the preset time length is set to be at least greater than the first time length (X seconds) and / or the second time length (Y seconds). Further, considering that the two devices may have a situation of sequential one-sided communication failure in an extreme case, the preset time length is set to be the sum of the first time length and the second time length. That is, the wireless block center device sends the state information of the crossed signal to the interlocking device for X+Y seconds in step S2, thereby ensuring that the state information of the crossed signal is still effective under extreme communication delay, and continuously marking that the signal is being crossed by the train. Thus, the embodiment introduces the bidirectional communication interruption time thresholds X and Y between the wireless block center device and the interlocking device, covers the scenario of sequential one-sided communication failure of the two devices by continuously sending the crossed signal state information for X+Y seconds, and accurately solves the problem of signal state asynchronization caused by communication problems.

[0049] It can be understood that, during the period when the wireless block center device marks that the signal is being crossed by the train, if the tail of the current train has completely entered the target route, at this time, due to communication delay and other reasons, the interlocking device does not receive the state information of the crossed signal, and therefore the interlocking device still sends the target route state as normal and the signal state as open to the wireless block center device.

[0050] In addition, as Figure 2 indicated, the method further includes the step S4, if it is marked that the signal is not being crossed by the train for a preset time length, it is marked that the signal is not being crossed by the train, and the train permission of the subsequent train is allowed to extend into the target route.

[0051] In addition, within the preset time length after marking that the signal is being crossed by the train, if the interlocking device judges that the first section (the first section refers to the section of XWG in the route, as Figure 3 indicated) in the target route has been idle according to the fusion occupation state, and still does not receive the state information of the crossed signal sent by the wireless block center device (may be caused by communication failure), the interlocking device sets the signal as abnormally closed and the target route as unavailable in advance, at this time, manual intervention is needed. Therefore, the interlocking device can abnormally close the signal in advance under certain conditions, multi-dimensional protection is realized, and the control reliability is improved.

[0052] The scheme of the application is described below with a specific example. As Figure 3 indicated, it is a schematic diagram of train permission extension when multiple trains are running in tracking mode, the front train crosses the route, and the rear train extends the train permission. The method for controlling the train permission extension of the rear train by the crossed information after the front train enters the route is described in detail as follows:

[0053] Step 1, trains A and B have train permission for running in the section in tracking mode, and the X-XI receiving route is handled for train A;

[0054] The on-board device of train A sends the position report of train A to the wireless block device, the route is in a normal state, and the signal is in an open state. At this time (0 time), the X signal is not crossed by the train, and the wireless block center device controls the train permission extension of train A into the route;

[0055] Step S2, according to the position information sent by the on-board device, the wireless block center device judges that the minimum safety front end of the last period train in the route approaches the section, and the minimum safety front end of the current period train and the overhang distance enter the train route, and starts to send the crossed signal state information to the interlocking device, at this time (T time), the wireless block center device marks that the X signal is being crossed by the train;

[0056] Step S3, during the T+X moment, the radio block center device continuously marks the X signal being crossed by the train, at this time the train B's train permission does not allow crossing the X signal;

[0057] Step S4, during the T+X+Y-1 moment, the radio block center device continuously marks the X signal being crossed by the train, at this time the train B's train permission does not allow crossing the X signal;

[0058] Step S5, during the T+X+Y+1 moment, the radio block center device no longer marks the X signal being crossed by the train, the X signal is not crossed by the train, at this time the train B's train permission allows crossing the X signal.

[0059] From the above technical solution, the application provides a method for controlling the extension of the train permission of the subsequent train based on the crossing signal, which systematically solves the train permission safety control problem in the signal crossing state of the train running through the technical combination of "crossing signal continuous marking + communication delay quantitative processing + double-end redundant control". By considering the communication delay time of the two sides, the radio block center device continuously sends the crossing state information to the interlocking device, and the radio block center device marks the information that the signal is being crossed by the train, etc., the train permission control function of the subsequent train is realized, it is ensured that the subsequent train will not enter the wrong route, and the system availability and safety are improved.

[0060] In some other embodiments, the application also provides a train operation control system, as shown in Figure 4 The interlocking device 10, the radio block center device 20 and the on-board device 30 are connected in communication;

[0061] The interlocking device 10 is used for handling the target route in front of the current train.

[0062] The radio block center device 20 is used for controlling the train permission extension of the current train into the target route;

[0063] The on-board device 30 of the current train is used for sending the position information of the current train to the radio block center device;

[0064] The radio block center device 20 is also used for receiving the position information sent by the on-board device 30 of the current train, sending the state information of the crossing signal to the interlocking device 10 when judging that the position of the current train will enter the target route, and marking that the signal is being crossed by the train; within a preset time length after marking that the signal is being crossed by the train, the train permission of the subsequent train is not allowed to extend into the target route.

[0065] Optionally, the radio block center device 20 is further configured to, if the signal is marked as being pressed by a train for a preset time length, mark the signal as not being pressed by a train and allow the train permission of a subsequent train to extend into the target route.

[0066] Optionally, the preset time length is at least greater than a first time length and / or a second time length, the first time length being a time for the radio block center device 20 to determine a communication interruption with the interlocking device 10, and the second time length being a time for the interlocking device 10 to determine a communication interruption with the radio block center device 20.

[0067] Optionally, the preset time length is a sum of the first time length and the second time length.

[0068] Optionally, the radio block center device 20 is further configured to, after the signal is marked as being pressed by a train, continuously send the state information of the pressed signal to the interlocking device 10 within a preset time length.

[0069] Optionally, the position of the current train is about to enter the target route, specifically, a minimum safety front end of a previous cycle train of the current train is in an approach section of the target route, and a minimum safety front end of a current cycle train and a consideration of a overhang distance enter the target route.

[0070] Optionally, within the preset time length after the signal is marked as being pressed by a train, if the interlocking device 10 determines that a first section in the target route is idle in advance according to a fusion occupation state, and still does not receive the state information of the pressed signal sent by the radio block center device 20, the interlocking device 10 sets the signal to be abnormally closed and the target route to be unavailable in advance.

[0071] In some other embodiments, the present application further provides an electronic device, comprising a processor and a memory, the memory having a computer program stored thereon, the computer program being executed by the processor to implement the method as described above.

[0072] In some other embodiments, the present application further provides a readable storage medium, the readable storage medium having a computer program stored therein, the computer program being executed by a processor to implement the method as described above.

[0073] Each of the embodiments in the specification is described in a related manner, and the same and similar parts of each of the embodiments can be referred to each other. Each of the embodiments focuses on the difference from other embodiments. In particular, for the system, electronic device and storage medium embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the related parts can be referred to the part of the method embodiment.

[0074] It has to be noted that, as used in the present document, the terms "comprising", "comprising", "having" or "including" are to be interpreted as specifying the presence of the stated features, steps or components, but do not preclude the presence or addition of one or more other features, steps or components, nor do they preclude enclosures not expressly listed. It is further noted that, as used in the present document, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are used only for distinguishing between the individual features and do not imply any particular order or order of use. It is further noted that, as used in the present document, the terms "a", "an" and "the" might be not used in a limiting sense and should be interpreted to cover a single noun or plural variants of that noun, for example "a" or "an" element can cover one or more elements, and "the" element can cover one or more elements.

[0075] It should be noted that the embodiments disclosed in the present document can also be implemented in other ways. The above-described device embodiments are only illustrative, for example, the flowcharts and block diagrams in the drawings show the possible implementation architecture, function and operation of the devices, methods and computer program products according to the embodiments of the present document. In this regard, each block in the flowchart or block diagram can represent a module, a program segment or a part of code containing one or more executable instructions for implementing the specified logic function, and each block can represent a module, a program segment or a part of code containing one or more executable instructions for implementing the specified logic function. It should also be noted that in some alternative implementations, the functions noted in the blocks can occur in different orders from those noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and sometimes they can be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0076] Although the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as limiting the present invention. Various modifications and alternatives to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A method for controlling the extension of subsequent train driving permission based on a cross-pressure signal, characterized in that: Applied to radio block center equipment, including: Controlling the extension of the driving permission of the current train to enter the target route, where the target route is the route of the preceding train processed by the interlocking device for the current train; receiving position information sent by the onboard equipment of the current train, and when determining that the position of the current train is about to enter the target route, sending state information of the cross-pressure signal to the interlocking device, and marking that the signal is being cross-pressured by the train; Within a preset time period after the signal is marked as being crossed by a train, the driving permission of subsequent trains is not allowed to extend into the target route.

2. The method for controlling the extension of subsequent train driving permission based on a cross-pressure signal according to claim 1, characterized in that: Also includes: If the signal is marked as being crossed by a train for a preset time period, the signal is marked as not being crossed by a train, and the driving permission of the subsequent train is allowed to extend to enter the target route.

3. The method for controlling the extension of subsequent train driving permission based on a cross-pressure signal according to claim 1, characterized in that: The preset duration is at least greater than a first duration and / or a second duration, the first duration being the time when the radio block center device determines that communication with the interlocking device is interrupted, and the second duration being the time when the interlocking device determines that communication with the radio block center device is interrupted.

4. The method for controlling the extension of subsequent train driving permission based on a cross-pressure signal according to claim 3, characterized in that: The preset duration is the sum of the first duration and the second duration.

5. The method for controlling the extension of subsequent train driving permission based on a cross-pressure signal according to claim 1, characterized in that: Within a preset time period after the signal is marked as being crossed by a train, the status information of the crossing signal is continuously sent to the interlocking device.

6. The method for controlling the extension of subsequent train driving permission based on a cross-pressure signal according to claim 1, characterized in that: The position of the current train is about to enter the target route, specifically: the minimum safe front end of the train in the previous cycle of the current train is in the approach section of the target route, and the minimum safe front end of the train in the current cycle enters the target route considering the overhang distance.

7. A train operation control system, characterized in that: It includes an interlocking device, a radio block center device and an on-board device, wherein the radio block center device is communicatively connected with the interlocking device and the on-board device respectively; The interlocking device is used to arrange the target route ahead for the current train. Radio block center equipment, used to control the extension of the current train's driving permit to the target route; The onboard equipment of the current train is used to send the position information of the current train to the radio block center equipment; The radio block center device is further configured to receive position information transmitted by the onboard device of the current train, and when determining that the current train is about to enter the target route, transmit state information of the cross-pressure signal to the interlocking device, and mark that the signal is being cross-pressured by the train; Within a preset time period after the signal is marked as being crossed by a train, the driving permission of subsequent trains is not allowed to extend into the target route.

8. The train operation control system according to claim 7, characterized in that: The radio block center equipment is further configured to, if the signal being crossed by a train has been marked for a preset time period, mark the signal as not being crossed by a train and allow the subsequent train's driving permission to extend into the target route.

9. The train operation control system according to claim 7, characterized in that: The preset duration is at least greater than a first duration and / or a second duration, the first duration being the time when the radio block center device determines that communication with the interlocking device is interrupted, and the second duration being the time when the interlocking device determines that communication with the radio block center device is interrupted.

10. The train operation control system according to claim 9, characterized in that: The preset duration is the sum of the first duration and the second duration.

11. The train operation control system according to claim 9, characterized in that: The radio block center equipment is further configured to continuously send status information of the crossing signal to the interlocking equipment within a preset time period after marking that the signal is being crossed by a train.

12. The train operation control system according to claim 7, wherein: The position of the current train is about to enter the target route, specifically: the minimum safe front end of the train in the previous cycle of the current train is in the approach section of the target route, and the minimum safe front end of the train in the current cycle enters the target route considering the overhang distance.

13. The train operation control system according to claim 7, characterized in that: Within a preset time period after the signal is marked as being crossed by a train, if the interlocking device determines in advance based on the fused occupancy status that the first section inside the target route is idle, and has not yet received the status information of the cross-traffic signal sent by the radio block center equipment, the interlocking device will set the signal to abnormal closure in advance and the target route to unavailable.

14. An electronic device, characterized in that: The method comprises a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the method according to any one of claims 1 to 6 is implemented.

15. A readable storage medium, characterized in that The readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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