Distributed self-checking method supporting uninterrupted operation of subway signal system

Abstract

The invention discloses a distributed self-checking method for supporting uninterrupted operation of a subway signal system. The method comprises the following steps: S1, judging whether trackside resources needing to be checked are expropriated by a regional controller or not; s2, if the trackside resource is expropriated by the area controller, judging whether the trackside resource is within the validity period of self-inspection, and if the trackside resource is not expropriated by the area controller, judging whether the trackside resource self-inspection is about to expire; s3, if the trackside resources are not within the validity period of the self-inspection, independently executing the self-inspection of the trackside resources, and if the trackside resources are within the validity period of the self-inspection, passing the arrangement of the trackside resources; s4, if the trackside resource self-inspection is about to expire, independently executing the trackside resource self-inspection, and if the trackside resource self-inspection is not about to expire, re-judging whether the trackside resource is expropriated by the regional controller; and S5, after the self-inspection of the trackside resources is completed, the arrangement is passed. According to the invention, the contradiction between 24-hour operation requirements and signal self-inspection is solved.

Description

Technical Field

[0001] The invention relates to a distributed self-checking method for supporting the uninterrupted operation of a subway signal system. Background Art

[0002] The significance of subway signal system self-inspection is to ensure the safe operation of the subway. With the development of cities and population growth, the passenger flow of subway systems continues to increase. Especially in some extreme scenarios (such as major events, concentrated return trips during the Spring Festival travel rush, etc.) or ordinary night snack lines, the subway needs to provide 24-hour operation and cannot be interrupted due to self-inspection. However, this is in conflict with the need for subway signal system self-inspection.

[0003] For the current signal systematization, the purpose of self-checking is mainly divided into two parts:

[0004] The self-inspection at the platform layer is used to ensure the security of the secure computing platform. This part does not need to rely on regular daily self-inspection. It can be automatically completed by the platform layer during a time period with less resource consumption. As long as all projects are completed in a decentralized manner within 24 hours or a specified time, it will be fine.

[0005] The IO (input / output port) self-check at the trackside is a problem that needs to be solved intensively, as follows:

[0006] On the basis of utilizing distributed self-inspection at the platform level, combined with the operation diagram of the signal system and the self-inspection cycle of specific requirements, a resource-centric distributed self-inspection strategy is implemented. That is, if the resource has been self-inspected as required before and is still within the validity period of the self-inspection, the resource can be used by the trackside controller, for example, to arrange the route through the switch and other operations. That is, if the resource has not been self-inspected as required before or the validity period of the self-inspection has expired, the resource needs to be self-inspected again. After the self-inspection is completed, the trackside controller can reuse the resource.

[0007] At present, most of them adopt the centralized self-checking method, that is, to complete the self-checking of all IO ports at one time, which is relatively simple to implement, but the disadvantage is that because all IO points need to be self-checked one by one in sequence, the implementation time is long, and there may be 1 to 2 minutes of operational impact. At this time, all IO points are in an unavailable state. At this time, the signal system cannot use all the equipment in the self-checking state, such as the signal machine cannot light up the permission state, the turnout may not be moved or the first set, the shield door is in the open state, etc., which means that the train cannot pass through the relevant equipment section. For general non-24-hour continuous operation lines, there is no big problem, because basically the self-checking time is in the non-operating period, and a few minutes of line interruption is acceptable. However, for 24-hour operation lines, interrupting operations for a few minutes is unacceptable.

[0008] In order to solve this problem, a decentralized self-checking method is provided to support the uninterrupted operation of a subway signal system. Summary of the invention

[0009] The purpose of the present invention is to overcome the existing defects and provide a decentralized self-checking method that supports the uninterrupted operation of a subway signal system, thereby resolving the contradiction between the 24-hour operation requirement and the signal self-checking.

[0010] The technical solution to achieve the above purpose is:

[0011] A distributed self-checking method for supporting uninterrupted operation of a subway signal system, comprising:

[0012] Step S1, determining whether the trackside resources to be inspected are requisitioned by the regional controller;

[0013] Step S2, if the trackside resource is requisitioned by the regional controller, then determine whether the trackside resource is within the validity period of the self-inspection; if the trackside resource is not requisitioned by the regional controller, then determine whether the self-inspection of the trackside resource is about to expire;

[0014] Step S3, if it is not within the validity period of the self-test, then the self-test of the trackside resource is performed separately; if it is within the validity period of the self-test, then the trackside resource is arranged to pass;

[0015] Step S4, if the self-inspection of the trackside resource is about to expire, then the self-inspection of the trackside resource is performed separately; if the self-inspection of the trackside resource is not about to expire, then it is re-determined whether the trackside resource is requisitioned by the regional controller;

[0016] Step S5, after the self-inspection of the trackside resource is completed, it is arranged to pass.

[0017] Preferably, in step S2, by activating the self-check timer of each trackside resource, it is determined whether the trackside resource is within the validity period of the self-check.

[0018] Preferably, in step S2, within the effective time of the timer, the trackside resources can be used by the trackside controller. Once the timer times out, a self-check is required, which is divided into two cases:

[0019] During the idle period when the trackside resources are not used, a self-check is performed;

[0020] If the trackside resource has been in use for a long time, a self-inspection will be arranged after the self-inspection validity period expires, which will affect the system operation for a few seconds. Considering the 24-hour operation scenario, the system operation density will not be very high during the midnight period. If the self-inspection time is properly allocated, the system will perform a self-inspection during the idle period when it is not used.

[0021] Preferably, in step S2, the self-inspection time of the trackside resources is considered together with the train timetable, or a self-inspection is arranged when the validity period of the self-inspection time is about to end and the trackside resources are free, thereby optimizing the selection of the self-inspection time.

[0022] Preferably, in step S4, the self-check of the trackside resource is performed separately, including:

[0023] Initialization phase: When the system starts, a comprehensive check is performed on all IO ports of the trackside resources;

[0024] Periodic inspection: During system operation, the IO port of the trackside resource is self-checked according to the predetermined period;

[0025] Real-time monitoring: Real-time monitoring of the key IO ports of the trackside resources to promptly detect and handle any abnormal situations;

[0026] Exception handling: Once an abnormality is detected, the maintenance personnel will be notified through the alarm system and handled according to the predetermined strategy.

[0027] Preferably, the predetermined strategy includes but is not limited to switching to a backup system and performing automatic repair attempts.

[0028] The beneficial effects of the present invention are as follows: the present invention changes the centralized self-check into a distributed self-check with a single device as the unit, classifies the IO points according to each device, breaks the logic of unified self-check, and thus the time required for a single device to complete a self-check will be greatly reduced, and the self-check of a single device can be completed in just a few seconds, which can ensure 24-hour uninterrupted operation; the present invention does not require hardware-level changes, and can meet the long-term uninterrupted subway operation requirements of subway customers on the basis of only modifying the software, which can save time and financial costs, and the traditional centralized self-check and the distributed self-check mentioned in this article can be automatically switched according to the operating conditions, which is convenient and flexible, and does not require additional learning costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a flow chart of a distributed self-checking method for supporting uninterrupted operation of a subway signal system. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] like Figure 1 As shown, a decentralized self-checking method for supporting uninterrupted operation of a subway signal system includes:

[0033] Step S1, determining whether the trackside resources to be inspected are requisitioned by the regional controller.

[0034] Step S2: if the trackside resource is requisitioned by the regional controller, determine whether the trackside resource is within the validity period of the self-inspection; if the trackside resource is not requisitioned by the regional controller, determine whether the trackside resource self-inspection is about to expire.

[0035] In an embodiment, by enabling the self-check timer of each trackside resource (eg, each trackside resource needs to complete at least one self-check within 24 hours), it is determined whether the trackside resource is within the validity period of the self-check.

[0036] In the embodiment, the trackside resources can be used by the trackside controller within the effective time of the timer. Once the timer expires, a self-check is required, which is divided into two cases:

[0037] During the idle period when the trackside resources are not used, a self-check is performed (at this time, the self-check does not affect the operation of the subway system);

[0038] If the trackside resource has been in use for a long time, a self-inspection will be arranged after the self-inspection validity period expires, which will affect the system operation for a few seconds (considering that the self-inspection time of a single resource will be very fast). Considering the 24-hour operation scenario, the system operation density will not be very high during the midnight period. If the self-inspection time is properly allocated, the system will perform a self-inspection during the idle period when it is not used.

[0039] In the embodiment, the self-inspection time of the trackside resources is considered together with the train schedule, or a self-inspection is arranged when the validity period of the self-inspection time is about to end and the trackside resources are free, thereby optimizing the selection of the self-inspection time.

[0040] Step S3: If it is not within the validity period of the self-inspection, the self-inspection of the trackside resource is performed separately; if it is within the validity period of the self-inspection, the trackside resource is arranged to pass.

[0041] Step S4: if the self-inspection of the trackside resource is about to expire, the self-inspection of the trackside resource is performed separately; if the self-inspection of the trackside resource is not about to expire, it is re-determined whether the trackside resource is requisitioned by the regional controller.

[0042] In the embodiment, the self-check of the trackside resource is performed separately, including:

[0043] Initialization phase: When the system starts, a comprehensive check is performed on all IO ports of the trackside resources;

[0044] Periodic inspection: During system operation, the IO port of the trackside resource is self-checked according to the predetermined period;

[0045] Real-time monitoring: Real-time monitoring of the key IO ports of the trackside resources to promptly detect and handle any abnormal situations;

[0046] Exception handling: Once an abnormality is detected, the maintenance personnel will be notified through the alarm system and handled according to the predetermined strategy.

[0047] Predetermined policies include, but are not limited to, switching to a backup system and making automatic repair attempts.

[0048] Step S5, after the self-inspection of the trackside resource is completed, it is arranged to pass.

[0049] In the present invention, each trackside device records the self-check time of its own IO separately, that is, it only needs to ensure that it performs a self-check once every 24 hours, without having to perform a self-check together with other devices. When the time from the last self-check of the device is close to 24 hours, and the regional controller is not requisitioning the device at this time (no route passes through its own device), it can trigger a self-check, and after the self-check is completed, it can continue to be used by the ZC; if the self-check time has exceeded 24 hours, it needs to perform a self-check before the route passes through to ensure that the device is available. From the outside, it is only a few seconds late for the route to be triggered, and there will be no major operational impact. That is, the present invention changes the centralized self-check to a distributed self-check based on a single device, and classifies the IO points according to each device, breaking the logic of unified self-check. In this way, the time required for a single device to complete a self-check will be greatly reduced, and the self-check of a single device can be completed in just a few seconds, which can ensure 24-hour uninterrupted operation.

[0050] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distributed self-checking method for supporting uninterrupted operation of a subway signal system, characterized in that: include: Step S1, determining whether the trackside resources to be inspected are requisitioned by the regional controller; Step S2, if the trackside resource is requisitioned by the regional controller, then determine whether the trackside resource is within the validity period of the self-inspection; if the trackside resource is not requisitioned by the regional controller, then determine whether the self-inspection of the trackside resource is about to expire; Step S3, if it is not within the validity period of the self-test, then the self-test of the trackside resource is performed separately; if it is within the validity period of the self-test, then the trackside resource is arranged to pass; Step S4, if the self-inspection of the trackside resource is about to expire, then the self-inspection of the trackside resource is performed separately; if the self-inspection of the trackside resource is not about to expire, then it is re-determined whether the trackside resource is requisitioned by the regional controller; Step S5, after the self-inspection of the trackside resource is completed, it is arranged to pass.

2. A distributed self-checking method for supporting uninterrupted operation of a subway signal system according to claim 1, characterized in that: In step S2, by activating the self-check timer of each trackside resource, it is determined whether the trackside resource is within the validity period of the self-check.

3. A distributed self-checking method for supporting uninterrupted operation of a subway signal system according to claim 1, characterized in that: In step S2, the trackside resources can be used by the trackside controller within the effective time of the timer. Once the timer times out, a self-check is required, which is divided into two situations: During the idle period when the trackside resources are not used, a self-check is performed; If the trackside resource has been in use for a long time, a self-inspection will be arranged after the self-inspection validity period expires, which will affect the system operation for a few seconds. Considering the 24-hour operation scenario, the system operation density will not be very high during the midnight period. If the self-inspection time is properly allocated, the system will perform a self-inspection during the idle period when it is not used.

4. A distributed self-checking method for supporting uninterrupted operation of a subway signal system according to claim 1, characterized in that: In step S2, the self-inspection time of the trackside resources is considered together with the train schedule, or a self-inspection is arranged when the validity period of the self-inspection time is about to end and the trackside resources are free, thereby optimizing the selection of the self-inspection time.

5. A distributed self-checking method for supporting uninterrupted operation of a subway signal system according to claim 1, characterized in that: In step S4, the self-check of the trackside resource is performed separately, including: Initialization phase: When the system starts, a comprehensive check is performed on all IO ports of the trackside resources; Periodic inspection: During system operation, the IO port of the trackside resource is self-checked according to the predetermined period; Real-time monitoring: Real-time monitoring of the key IO ports of the trackside resources to promptly detect and handle any abnormal situations; Exception handling: Once an abnormality is detected, the maintenance personnel will be notified through the alarm system and handled according to the predetermined strategy.

6. A distributed self-checking method for supporting uninterrupted operation of a subway signal system according to claim 1, characterized in that: Predetermined policies include, but are not limited to, switching to a backup system and making automatic repair attempts.

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