Train braking test method and system, electronic equipment and storage medium

Abstract

The invention provides a train braking test method and system, electronic equipment and a storage medium, and aims to switch a braking test process through a driving mode by detecting the current driving mode of a train. According to the embodiment of the invention, two different brake test processes including automatic and manual brake test processes can be simultaneously compatible, and the brake performance of the test train in different driving modes is ensured. The automatic braking test can quickly complete the braking test, ensures the operation order and safety of the motor train unit, and avoids the adverse consequences of operation order disorder, train delay and the like caused by braking faults in train operation.

Description

Technical Field

[0001] The present application relates to the field of rail transit, and in particular to a train braking test method, system, electronic equipment and storage medium. Background Art

[0002] Generally, a manually guided menu brake test is required before the train leaves the depot for operation, in order to ensure the driving safety and the personal and property safety of passengers after the train leaves the depot for operation. At present, with the increasing development of rail transit technology, the demand for fully automatic driving of high-speed EMUs is gradually expanding. As a result, the automation requirements for brake tests are gradually being put on the agenda. Traditional menu-guided brake tests require manual operation and are not suitable for fully automatic driving trains. If the menu brake test under fully automatic driving conditions cannot be completed in time, it will affect the safety of train operations, waste time and manpower, and affect the comfort and safety of passengers. Summary of the invention

[0003] In order to solve one of the above-mentioned technical defects, a train braking test method and system are provided in an embodiment of the present application.

[0004] A first aspect of an embodiment of the present application provides a train braking test method, the method comprising:

[0005] Detect the current driving mode of the train;

[0006] When the current driving mode of the train is the fully automatic driving mode, the automatic braking test process is switched to, and the automatic braking test is performed in sequence according to the preset braking test items;

[0007] When the current driving mode of the train is the manual driving mode, the process is switched to the manual braking test process, and the manual braking test is performed according to the manually selected braking test items.

[0008] A second aspect of an embodiment of the present application provides a train brake test system, the system comprising a train control and monitoring system TCMS, a train automatic control system ATC, a brake test interface HMI and a brake system;

[0009] The train control and monitoring system TCMS is used to detect the current driving mode of the train and send an activation signal of the braking test item to the braking system;

[0010] The automatic train control system ATC is used to activate the automatic braking test process when the current driving mode of the train is the fully automatic driving mode;

[0011] The brake test interface HMI is used to activate the manual brake test process when the current driving mode of the train is the manual driving mode;

[0012] The braking system is used to perform an automatic braking test in sequence according to a preset braking test item sequence during an automatic braking test process based on an activation signal sent by a train control and monitoring system TCMS, or to perform a manual braking test according to manually selected braking test items during a manual braking test process.

[0013] According to a third aspect of the present application, an electronic device is provided, including:

[0014] Memory;

[0015] Processor; and

[0016] Computer programs;

[0017] The computer program is stored in the memory and is configured to be executed by the processor to implement the method as described in the first aspect above.

[0018] According to a fourth aspect of the embodiments of the present application, a computer-readable storage medium is provided, on which a computer program is stored; the computer program is executed by a processor to implement the method described in the first aspect above.

[0019] The train braking test method provided in the embodiment of the present application is adopted to detect the current driving mode of the train, and then switch the braking test process according to the driving mode. The embodiment of the present application can be compatible with two different braking test processes, automatic and manual, to ensure the braking performance of the test train under different driving modes. The automatic braking test can quickly complete the braking test, ensure the operation order and safety of the EMU, and avoid adverse consequences such as operational disorder and train delays caused by braking failures during train operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 A principle block diagram of the train braking test method provided in Example 1 of the present application;

[0022] Figure 2 A flow chart of a train braking test method provided in Example 1 of the present application;

[0023] Figure 3 A principle block diagram of the automatic braking test provided in Example 1 of the present application;

[0024] Figure 4 This is a flow chart of the automatic braking test illustrated in Example 1 of the present application;

[0025] Figure 5 A principle block diagram of the manual brake test provided in Example 1 of the present application;

[0026] Figure 6 This is a flow chart of the manual brake test illustrated in Example 1 of the present application;

[0027] Figure 7 This is a schematic diagram of the brake test interface HMI in Example 1 of the present application. DETAILED DESCRIPTION

[0028] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0029] Example 1

[0030] like Figure 1 As shown, this embodiment provides a train braking test method, which specifically includes:

[0031] S101, detecting the current driving mode of the train;

[0032] S102, switching the braking test process according to the current driving mode of the train.

[0033] Specifically, the driving modes of urban rail transit trains mainly include the following types:

[0034] Fully automatic driving mode (ATO): In this mode, the train's start, acceleration, cruising, coasting, braking, precise parking, door opening and reversing operations are all automatically controlled by the on-board signal equipment, and the driver does not need to operate manually. However, the driver needs to monitor all necessary driving information in the driver's cab, which will be displayed on the TOD screen in the driver's cab.

[0035] Manual driving mode under speed monitoring (ATP): In this mode, the speed, monitoring, operation and braking of the train are all operated by the driver within the limits of the on-board signal equipment. The driver is required to manually control the opening and closing of the doors, but before opening the doors, the on-board signal equipment needs to give a door opening permission signal.

[0036] Speed-limited manual driving mode (RM): In this mode, the speed, monitoring, operation and braking of the train are manually controlled by the driver. The on-board signal equipment will protect the train from overspeeding. If the train exceeds the set speed during driving, the on-board signal equipment will automatically apply emergency braking.

[0037] In addition, there is a non-restricted manual driving mode (NRM): in this mode, the operation of the train is not protected by the on-board ATP system, so there is a certain risk of rear-end collision. This mode will only be used in special circumstances, such as failure of the on-board signal system or telephone block driving.

[0038] For this embodiment, since the brake test is completed before the train leaves the depot, it is only necessary to consider whether the current driving mode of the train is the fully automatic driving mode or the manual driving mode, and there is no need to consider the subdivided driving modes. The current driving mode of the train in this embodiment can be obtained by detecting the train control and monitoring system TCMS. According to the different driving modes of the train, the corresponding brake test process can be selected. Specifically, Figure 2 As shown:

[0039] When the current driving mode of the train is the fully automatic driving mode, it switches to the automatic braking test process and performs the automatic braking test in sequence according to the preset braking test items;

[0040] When the current driving mode of the train is manual driving mode, it switches to the manual braking test process and performs the manual braking test according to the manually selected braking test items.

[0041] Regardless of the braking test process performed, the braking system is the final execution component, responsible for performing braking tests according to the braking test items and feeding back the test results.

[0042] Further, such as Figure 3 As shown, the process of performing the automatic braking test in this embodiment includes:

[0043] S1021. When the current driving mode of the train is the fully automatic driving mode, the train automatic control system ATC activates the automatic braking test;

[0044] S1022, the train control and monitoring system TCMS triggers the braking test items to the braking system in sequence according to the preset braking test item sequence;

[0045] S1023. The braking system feeds back the braking test results to the train control and monitoring system TCMS.

[0046] Specifically, in this embodiment, when the driving mode of the train is the fully automatic driving mode, the train automatic control system ATC will be put into operation. At this time, if you want to perform a braking test under the fully automatic driving mode, you also need to enable the train automatic control system ATC to activate the automatic braking test.

[0047] After the train automatic control system ATC activates the automatic braking test, the train control and monitoring system TCMS can trigger the braking test items to the braking system in sequence according to the pre-set braking test item sequence, and finally the braking system executes the braking test items and feeds back the test results. It should be noted that since there is no human participation in the automatic braking test in the middle process, in order to ensure the reliability and safety of the test, when any braking test item has an error, the automatic braking test must be ended in advance so that the operation and maintenance personnel can adjust the train braking performance.

[0048] In addition, in order to further improve the reliability of the braking test, this embodiment needs to determine whether the train meets the braking test conditions before conducting the automatic braking test. First, the current state of the train is detected by the train control and monitoring system TCMS or other monitoring software. Then the current state of the train is compared with the preset automatic braking test conditions to determine whether the automatic braking test conditions are met. Only when the automatic braking test conditions are met can the subsequent automatic braking test be carried out. The automatic braking test conditions can cover communication status, traction status, speed status, braking status, etc.

[0049] For ease of understanding, this embodiment takes the automatic braking test of a certain type of train as an example. The automatic braking test process of the train of this type is as follows: Figure 4 First, determine whether the current state of the train meets the automatic braking test conditions. If so, proceed to the next step. If not, adjust the train state. For intuitive explanation, the following conditions for meeting the automatic braking test are listed in the example of this embodiment:

[0050] (1) The train is in non-emergency traction state;

[0051] (2) Train communications are in normal working condition;

[0052] (3) The train has only one driver's cab in an active state;

[0053] (4) The number of traction units in the train is less than the preset threshold. The number of traction units in ordinary trains is in the range of 1, 2, 3, and 4. If it exceeds the range, it is considered that the train has communication abnormalities and the test cannot be carried out;

[0054] (5) The current speed of the train is zero;

[0055] (6) The parking brake monitoring loop and the emergency brake loop of the train are in an unisolated state. The EMU is generally equipped with 5 to 6 safety loops, of which the parking brake monitoring loop and the emergency brake loop are two. The parking brake monitoring loop can monitor the parking brake application status when the train is in operation. If the parking brake is applied abnormally, the loop will be powered off, causing the train to brake. The emergency brake loop can monitor the safety status of the train. If the train is in an abnormal operation state or the driver mechanically thinks that the brake is applied, the loop will be broken, causing the train to brake.

[0056] (7) The total air pressure of the train is higher than the preset pressure value. The preset pressure value can be adjusted according to different types of trains. For example, the preset pressure value of 7.7 bar is the minimum air pressure required for the train total air pressure to perform the brake test. If it is lower than 7.7 bar, the signal becomes 1 (indicating that the total air pressure is low), and if it is higher than 8 bar, the signal becomes 0 (indicating that the total air pressure meets the test conditions). In other cases, the previous state is maintained. In the logic control, the reset signal is inverted as the test enable condition;

[0057] (8) The train parking brake is in the applied state. At this time, it is necessary to ensure that the braking system allows the braking test to be enabled, that is, the braking system feedback meets the braking conditions.

[0058] After the current state of the train meets the conditions for the automatic braking test, the train automatic control system ATC first activates the automatic braking test, and then the train control and monitoring system TCMS triggers the braking test items to the braking system in sequence according to the preset braking test item sequence. This embodiment takes the order of common braking test, emergency braking test, anti-skid braking test, total wind penetration test and other braking tests as an example. Of course, according to different scenarios and different types of trains, the braking test items and sequence can also be appropriately adjusted, and this embodiment does not make special restrictions. After the braking system performs common braking test, emergency braking test, anti-skid braking test, total wind penetration test and other braking tests in sequence, the automatic braking test is completed. Other braking tests can also be subdivided into relay braking test, braking fault isolation test, etc. In this process, if any braking test item has an error, the automatic braking test process will be stopped immediately. At the same time, after any braking test item is completed, the braking test interface HMI will save the test results and test time. The test results and test time can be displayed again through the braking test interface HMI after the train is powered off and then powered on, so that the driver can view and decide whether to perform the braking test again, which can further improve the reliability of the braking test.

[0059] Further, such as Figure 5 As shown, the process of performing the manual brake test in this embodiment includes:

[0060] S102A, when the current driving mode of the train is the manual driving mode, starting the brake test interface HMI;

[0061] S102B, the brake test interface HMI obtains the manually selected brake test item option, and sends the brake test item option to the train control and monitoring system TCMS;

[0062] S102C, the train control and monitoring system TCMS sends an activation signal corresponding to the selected braking test item to the braking system;

[0063] S102D. The braking system feeds back the braking test results to the train control and monitoring system TCMS.

[0064] Specifically, in this embodiment, when the driving mode of the train is the manual driving mode, the braking test interface HMI is started. The braking test interface HMI displays braking test items for the driver or operation and maintenance personnel to select. The selection method can be touch, knob or button, etc., which is not specifically limited in this embodiment. After obtaining the manually selected braking test item option, the braking test interface HMI sends the braking test item option to the train control and monitoring system TCMS. The train control and monitoring system TCMS sends an activation signal corresponding to the selected braking test item to the braking system, and finally the braking system executes the braking test item and feeds back the test results.

[0065] In order to further improve the reliability of the braking test, this embodiment needs to determine whether the train meets the braking test conditions before conducting the manual braking test. First, the current state of the train is detected by the train control and monitoring system TCMS or other monitoring software. Then the current state of the train is compared with the preset manual braking test conditions to determine whether the manual braking test conditions are met. Only when the manual braking test conditions are met can the subsequent manual braking test be carried out. The manual braking test conditions can cover communication status, traction status, speed status, braking status, etc.

[0066] For ease of understanding, this embodiment also takes a manual brake test of a certain type of train as an example. The manual brake test process of the train of this type is as follows: Figure 6 First, determine whether the current state of the train meets the manual brake test conditions. If so, proceed to the next step. If not, adjust the train state. For intuitive explanation, the following conditions for meeting the manual brake test are listed in the example of this embodiment:

[0067] (1) The train is in non-emergency traction state;

[0068] (2) Train communications are in normal working condition;

[0069] (3) The train has only one driver's cab in an active state;

[0070] (4) The number of traction units in the train is less than the preset threshold. The number of traction units in ordinary trains is in the range of 1, 2, 3, and 4. If it exceeds the range, it is considered that the train has communication abnormalities and the test cannot be carried out;

[0071] (5) The current speed of the train is zero;

[0072] (6) The parking brake monitoring loop and the emergency brake loop of the train are in an unisolated state. The EMU is generally equipped with 5 to 6 safety loops, of which the parking brake monitoring loop and the emergency brake loop are two. The parking brake monitoring loop can monitor the parking brake application status when the train is in operation. If the parking brake is applied abnormally, the loop will be powered off, causing the train to brake. The emergency brake loop can monitor the safety status of the train. If the train is in an abnormal operation state or the driver mechanically thinks that the brake is applied, the loop will be broken, causing the train to brake.

[0073] (7) The total air pressure of the train is higher than the preset pressure value. The preset pressure value can be adjusted according to different types of trains. For example, the preset pressure value of 7.7 bar is the minimum air pressure required for the train total air pressure to perform the brake test. If it is lower than 7.7 bar, the signal becomes 1 (indicating that the total air pressure is low), and if it is higher than 8 bar, the signal becomes 0 (indicating that the total air pressure meets the test conditions). In other cases, the previous state is maintained. In the logic control, the reset signal is inverted as the test enable condition;

[0074] (8) The train parking brake is in the applied state. At this time, it is necessary to ensure that the braking system allows the braking test to be enabled, that is, the braking system feedback meets the braking conditions.

[0075] When the current state of the train meets the automatic braking test conditions, the braking test interface HMI can display visual information that the test conditions are met, so that a manual braking test can be performed. Figure 7 As shown, the braking test interface HMI can display a variety of braking test items such as common braking test, EB emergency braking test, anti-skid test, FB deceleration insufficient EB test, etc. Of course, depending on the train model, the braking test items can also be modified or deleted, and this embodiment does not make special restrictions. The driver or operator can choose to perform any braking test item on the braking test interface HMI. After clicking the start button, the train control and monitoring system TCMS can send an activation signal for the braking test item to the braking system, and display the current progress information or prompt the driver or operator to continue the operation on the braking test interface HMI. After the braking test item is completed, the braking test interface HMI will save the test results and test time. The test results and test time can be displayed again through the braking test interface HMI after the train is powered off and then powered on, so that the driver can view and decide whether to perform the braking test again, which can further improve the reliability of the braking test.

[0076] The train braking test method provided in this embodiment can be compatible with two different braking test processes, automatic and manual, to ensure the braking performance of the train under different driving modes. The automatic braking test can quickly complete the braking test, ensure the operation order and safety of the EMU, and avoid adverse consequences such as operational disorder and train delays caused by braking failures during train operation.

[0077] Example 2

[0078] Corresponding to Example 1, this embodiment provides a train brake test system, which includes a train control and monitoring system TCMS, a train automatic control system ATC, a brake test interface HMI and a brake system.

[0079] Train Control and Monitoring System (TCMS), which detects the current driving mode of the train and sends activation signals for brake test items to the brake system;

[0080] The automatic train control system ATC is used to activate the automatic braking test process when the current driving mode of the train is the fully automatic driving mode;

[0081] Braking test interface HMI, used to activate the manual braking test process when the current driving mode of the train is manual driving mode;

[0082] The braking system is used to perform an automatic braking test in sequence according to the preset braking test items in the automatic braking test process based on the activation signal sent by the train control and monitoring system TCMS, or to perform a manual braking test in sequence according to the manually selected braking test items in the manual braking test process.

[0083] This embodiment can be compatible with two different braking test processes, automatic and manual, to ensure the braking performance of the train under different driving modes. The automatic braking test can quickly complete the braking test, ensure the operation order and safety of the EMU, and avoid adverse consequences such as operational disorder and train delays caused by braking failures during train operation.

[0084] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] In addition, based on the same inventive concept of the above train brake test method, this embodiment provides an electronic device, including: a memory, a processor, and a computer program. The computer program is stored in the memory and is configured to be executed by the processor to implement the various steps of the train brake test method in the above embodiment. No further description is given here.

[0086] Accordingly, based on the same inventive concept of the above train brake test method, this embodiment provides a computer-readable storage medium on which a computer program is stored. The computer program is executed by a processor to implement the various steps of the train brake test method in the above embodiment. No further description is given here.

[0087] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code. The scheme in the embodiments of the present application can be implemented in various computer languages, for example, object-oriented programming language Java and literal scripting language JavaScript, etc.

[0088] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0089] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0090] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0091] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0092] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A train braking test method, characterized in that: The method comprises: Detect the current driving mode of the train; When the current driving mode of the train is the fully automatic driving mode, the automatic braking test process is switched to, and the automatic braking test is performed in sequence according to the preset braking test items; When the current driving mode of the train is the manual driving mode, the process is switched to the manual braking test process, and the manual braking test is performed according to the manually selected braking test items.

2. The method according to claim 1, characterized in that When the current driving mode of the train is the fully automatic driving mode, the process of switching to the automatic braking test process and performing the automatic braking test according to the preset braking test item sequence includes: When the current driving mode of the train is the fully automatic driving mode, the train automatic control system ATC activates the automatic braking test; The train control and monitoring system TCMS triggers the braking test items to the braking system in sequence according to the preset braking test item sequence; The braking system feeds back the braking test results to the train control and monitoring system TCMS.

3. The method according to claim 2, characterized in that Before the automatic train control system ATC activates the automatic braking test, the method further includes: The train control and monitoring system TCMS detects the current status of the train; When the current state of the train meets the preset automatic braking test conditions, the train automatic control system ATC activates the automatic braking test.

4. The method according to claim 3, characterized in that The preset automatic braking test conditions include: The train is in non-emergency traction status; Train communications are in normal working condition; The train has only one driver's cab in an active state; The number of traction units in the train is less than the preset threshold; The current speed of the train is zero; The train parking brake monitoring loop is in an unisolated state; The train emergency brake loop is in an unisolated state; The total air pressure of the train is higher than the preset pressure value; The train parking brake is applied.

5. The method according to claim 2, characterized in that: After the braking system feeds back the braking test result to the train control and monitoring system TCMS, the method further includes: When an error occurs in any braking test item, the automatic braking test ends.

6. The method according to claim 1, characterized in that When the current driving mode of the train is the manual driving mode, the process of switching to the manual braking test process and performing the manual braking test according to the manually selected braking test items includes: When the current driving mode of the train is the manual driving mode, starting a brake test interface HMI, wherein at least one brake test item is displayed on the brake test interface HMI; The brake test interface HMI obtains the manually selected brake test item options and sends the brake test item options to the train control and monitoring system TCMS; The train control and monitoring system TCMS sends an activation signal corresponding to the selected brake test item to the brake system; The braking system feeds back the braking test results to the train control and monitoring system TCMS.

7. The method according to claim 6, characterized in that After starting the brake test interface HMI, the method further includes: The train control and monitoring system TCMS detects the current status of the train; When the current state of the train meets the preset manual brake test conditions, visual information that meets the test conditions is displayed on the brake test interface HMI.

8. The method according to claim 7, characterized in that The preset manual brake test conditions include: The train is in non-emergency traction status; Train communications are in normal working condition; The train has only one driver's cab in an active state; The number of traction units in the train is less than the preset threshold; The current speed of the train is zero; The train parking brake monitoring loop is in an unisolated state; The train emergency brake loop is in an unisolated state; The total air pressure of the train is higher than the preset pressure value; The train parking brake is applied.

9. The method according to claim 1, characterized in that: The method further comprises: saving the test results and test time of the automatic braking test and the manual braking test.

10. A train brake test system, characterized in that: The system includes a train control and monitoring system TCMS, a train automatic control system ATC, a brake test interface HMI and a brake system; The train control and monitoring system TCMS is used to detect the current driving mode of the train and send an activation signal of the braking test item to the braking system; The automatic train control system ATC is used to activate the automatic braking test process when the current driving mode of the train is the fully automatic driving mode; The brake test interface HMI is used to activate the manual brake test process when the current driving mode of the train is the manual driving mode; The braking system is used to perform an automatic braking test in sequence according to a preset braking test item sequence during an automatic braking test process based on an activation signal sent by a train control and monitoring system TCMS, or to perform a manual braking test according to manually selected braking test items during a manual braking test process.

11. An electronic device, characterized in that: include: Memory; processor; as well as Computer programs; The computer program is stored in the memory and is configured to be executed by the processor to implement the method according to any one of claims 1 to 9.

12. A computer-readable storage medium, characterized in that: A computer program is stored thereon; the computer program is executed by a processor to implement the method according to any one of claims 1 to 9.

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