Full-electronic turnout system and method for switching main board card and standby board card

Abstract

The full-electronic turnout system comprises a first board card and a second board card which are in communication connection with each other, and the output end of the first board card and the output end of the second board card are connected with a switch machine through a backboard; the input end of the first board card is connected with a first external power supply. The input end of the second board card is connected with a second external power supply. A scene monitoring unit which is in communication connection with the first board card and the second board card and is used for obtaining the operation states of the first board card and the second board card; the first board card synchronizes the turnout driving state and the turnout representing state to the second board card, and the second board card synchronizes the external power supply state to the first board card in real time; and when the monitoring unit monitors that the running state of the first board card fails, the first board card and the second board card which runs normally are switched. According to the invention, the two board cards which communicate with each other are used as a main board and a standby board, so that the continuity of a driving process and expression state acquisition during switching can be ensured; and meanwhile, human intervention is reduced, so that the risk of system faults caused by operation errors is reduced.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation, and in particular to a full electronic turnout system and a method for switching between main and standby boards. Background Art

[0002] The reliability of railway signal control systems is crucial to ensuring the safety of train operations. As the core component of the system, the fully electronic turnout board must be able to intelligently switch between active and standby modes in various predefined scenarios to cope with different system states and external conditions. The active and standby switching methods in the existing technology are not intelligent enough. In practical applications, more sophisticated control strategies are needed to decide when to switch to avoid unnecessary switching or failure to switch at critical moments, which would affect the overall performance of the system. Summary of the invention

[0003] In order to solve the above problems, the present invention will provide a full electronic turnout system and a board master-slave switching method, so that the full electronic turnout system can automatically and intelligently perform master-slave switching in these key scenarios, thereby improving the availability and safety of the railway signal control system. The master-slave switching is triggered by intelligently identifying and responding to specific system states and external conditions. The identification and response of these master-slave switching scenarios are based on real-time monitoring and analysis of the system state, and sensitive detection of changes in external conditions.

[0004] The present invention provides a fully electronic turnout system, comprising:

[0005] A first board and a second board connected to each other for communication, wherein output ends of the first board and the second board are connected to a transfer machine through a backplane; an input end of the first board is connected to a first external power source, and an input end of the second board is connected to a second external power source;

[0006] A scene monitoring unit, which is in communication with both the first board and the second board, and is used to obtain the operating status of the first board and the second board;

[0007] The first board synchronizes the turnout driving state and turnout display state to the second board, and the second board synchronizes the external power supply state to the first board in real time;

[0008] When the monitoring unit detects that the operating state of the first board fails, the first board is switched to a second board that operates normally.

[0009] Further, the scene monitoring unit includes a first scene monitoring unit and a second scene monitoring unit, the first scene monitoring unit is communicatively connected to the first board, and the second scene monitoring unit is communicatively connected to the second board.

[0010] Furthermore, the first board and the second board are connected via a CAN bus.

[0011] Furthermore, the first external power supply and the second external power supply both include: a driving power supply, a display power supply and a relay power supply.

[0012] Furthermore, the first board and the second board are both connected to the backplane circuit via five routes, a part of which is used for the transmission of turnout drive control signals, and another part of which is used for the transmission of status indication signals.

[0013] Furthermore, a communication cycle between the first board and the second board is 100 ms.

[0014] In addition, the present invention also provides a method for switching between the main and standby boards of a fully electronic turnout system, which is used in the fully electronic turnout system and comprises the following steps:

[0015] Step 1: monitor the operating status of the first board and the second board in real time through the scene monitoring unit;

[0016] Step 2: The first board and the second board interact periodically, the first board synchronizes the turnout drive state and the turnout indication state to the second board, and the second board synchronizes the external power supply state to the first board;

[0017] Step 3: presetting the trigger mechanism of the master-slave switch, including the following trigger conditions: the first board turnout drive fails, the indication state is not obtained, and the first external power supply is abnormal;

[0018] Step 4: On the premise that the second board is running normally, when any of the trigger conditions is met, the master-slave switching is performed.

[0019] Furthermore, the switching method further includes: after the master-slave switching, the second board executes corresponding instructions according to the running state of the first board synchronously obtained in the most recent communication cycle.

[0020] Furthermore, the switch drive failure includes: some of the five routes between the first board and the backplane are disconnected, resulting in the first scene monitoring unit obtaining that the current of some routes is higher than normal values, and at least one route current is 0.

[0021] Furthermore, the failure to acquire the representation state includes the following: some of the five routes between the first board and the backplane are disconnected, resulting in the first board failing to acquire the representation state beyond a preset time, and the first scene monitoring unit obtains that the current of some routes is higher than normal, and at least one route current is 0.

[0022] Furthermore, the non-picking indication state includes: the non-picking indication state after the turnout driving is completed and the non-picking indication state when the turnout is not driven.

[0023] Furthermore, the external power supply abnormality includes: any one or more of the driving power supply, the display power supply and the relay power supply in the first external power supply are abnormal.

[0024] The present invention uses two boards that communicate with each other as the main and standby cards, which can ensure the continuity of the driving process and the acquisition of the display status during switching;

[0025] By integrating multiple trigger conditions, more scenarios that may cause system failures can be covered, thereby achieving more comprehensive system monitoring and protection.

[0026] Automatically perform active-standby switching in critical scenarios, effectively avoiding security risks caused by system failures and greatly improving system availability.

[0027] At the same time, since human intervention is reduced, the risk of system failure due to operational errors is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural block diagram of the all-electronic turnout system of the present invention;

[0029] Figure 2 The present invention is a flow chart of the method for switching the master and standby boards of the fully electronic turnout system. DETAILED DESCRIPTION

[0030] The following is a further detailed description of a fully electronic turnout system and a method for switching between the main and standby boards proposed in the present invention in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purposes, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change in the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope of the technical content disclosed in the present invention.

[0031] like Figure 1As shown, a fully electronic turnout system proposed by the present invention includes: a scene monitoring unit, a first board 101 and a second board 201 that are connected to each other in communication, the output ends of the first board 101 and the second board 201 are connected to the transfer machine 401 through the backplane 301; the input end of the first board 101 is connected to the first external power supply 103, and the input end of the second board 201 is connected to the second external power supply 203. The two external power supplies are independent of each other and supply power to the two boards respectively; the scene monitoring unit is connected to the first board 101 and the second board 201 in communication, and is used to obtain the operating status of the first board 101 and the second board 201. In addition, the first board 101 synchronizes the turnout drive status and turnout display status to the second board 201, and the second board 201 synchronizes the external power supply status to the first board 101 in real time; when the monitoring unit detects that the operating status of the first board 101 fails, the first board 101 is switched to the second board 201 that is operating normally. After the switch, the second board 201 will continue to execute the actions that the first board 101 failed to complete after the failure, including driving the turnout and obtaining the turnout indication, etc., based on the latest turnout driving state and turnout indication state from the first board 101. The monitoring unit obtains the health status of the second board 201 by monitoring the external power supply state of the second board 201. In this embodiment, the first board 101 is used as the main board to obtain the indication state of the turnout, and to receive instructions from the upper computer (mainly the interlocking system) to drive the corresponding transfer machine to control the turnout state. The second board 201 is used as a standby board and does not participate in the direct acquisition and direct drive of the status indication. When the main board is healthy, the standby board is only connected to the external power supply. The main and standby boards obtain each other's operating status through real-time communication interaction. Optionally, the communication cycle between the first board 101 and the second board 201 is 100ms.

[0032] As described above, the first board 101 sends the turnout driving status and the turnout indicating status to the second board 201, and the second board 201 synchronizes the external power status with the first board 101 in real time, thereby ensuring that the second board 201, as a backup board, can obtain the turnout driving status and the turnout indicating status in time, so as to continue to execute the corresponding driving instructions and obtain the corresponding turnout indicating status after the first board 101 fails; similarly, the first board 101 can obtain the real-time external power status of the second board 201, and can communicate with the second board 201 when the second board 201 is operating normally.

[0033] Further, the scene monitoring unit includes a first scene monitoring unit 102 and a second scene monitoring unit 202, wherein the first scene monitoring unit 102 is communicatively connected to the first board 101, and the second scene monitoring unit 202 is communicatively connected to the second board 201. In this embodiment, the first board 101 includes the first scene monitoring unit 102, and the second board 201 includes the second scene monitoring unit 202.

[0034] Optionally, the first board 101 and the second board 201 are connected via a CAN bus.

[0035] Furthermore, both the first external power source 103 and the second external power source 203 include: a driving power source 121 , a display power source 122 and a relay power source 123 .

[0036] Furthermore, the first board 101 and the second board 201 are both connected to the backplane 301 circuit via five routes, a part of the routes of each board is used for the transmission of turnout drive control signals, and another part of the routes is used for the transmission of status indication signals.

[0037] In addition, the present invention also proposes a method for switching the master and standby boards of a full electronic turnout system, such as Figure 2 As shown, the following steps are included:

[0038] Step 1: monitor the operating status of the first board 101 and the second board 201 in real time through the scene monitoring unit;

[0039] Step 2: The first board 101 and the second board 201 interact periodically. The first board 101 synchronizes the turnout driving state and the turnout display state to the second board 201, and the second board 201 synchronizes the external power supply state to the first board 101;

[0040] Step 3: presetting the trigger mechanism of the master-slave switch, including the following trigger conditions: the first board 101 switch drive fails, the indication state is not obtained, and the first external power supply is abnormal;

[0041] Step 4: When the second board 201 is in normal operation and any of the trigger conditions are met, the master-slave switch is performed. The normal operation here mainly refers to the normal connection between the second board 201 and the second external power supply.

[0042] Furthermore, the method further includes: after the active / standby switching, the second board 201 executes corresponding instructions according to the operating state of the first board 101 synchronously obtained in the most recent communication cycle.

[0043] The first board 101 in the method is a main board, and the second board 201 is a standby board. The main board is connected to the backplane 301 circuit through five routes from X1 to X5, and the standby board is connected to the backplane 301 circuit through five routes from Y1 to Y5. The backplane 301 is connected to the transfer machine 401 through five routes from Z1 to Z5. The main board communicates with the backplane 301 through the X1 to X5 route, wherein part of the route is used for driving signal transmission, and other part of the route is used for the transmission of state indication signal. In this example, driving signal transmission is mainly realized by three routes in X1 to X5, and three non-repeated routes are used for state signal transmission. The driving signal mainly comes from the interlocking system, and the state of the turnout is controlled by the main board, and the turnout state indication signal is returned to the main board through the backboard.

[0044] Specifically, the switch drive failure includes: some of the five routes between the first board and the backplane are disconnected, resulting in the first scene monitoring unit obtaining that the current of some routes is higher than the normal value, and at least one route current is 0.

[0045] For example, in the first scenario, the first board 101 is connected to the backplane through five cables from X1 to X5, wherein the X1 cable disconnection failure triggers the master-slave switch during the driving process. In this scenario one, the first board is the main board, the second board is the standby board, and the first board receives a fixed drive command from the main control computer. The first scene detection unit collects the driving state of the first board in real time and synchronizes the driving state to the second board. After the X1 route from the first board to the backplane is disconnected, the first scene monitoring unit detects the three-phase driving current value in real time. The X1 cable disconnection causes the A phase current in the three-phase driving current to be detected as 0A, while the B phase and C phase currents will increase to exceed the threshold current THH (THH = 1.5A, if the B phase and C phase are 3A), resulting in driving failure. Drive failure will trigger the master-slave switch. After the master-slave switch is completed, the first board is downgraded to the standby board, and the second board is upgraded to the main board. The second board has the driving state of the first board, so after the second board is upgraded to the main board, the driving state is fixed drive, and the fixed drive operation can be performed immediately.

[0046] For example, in the second scenario, the X4 cable of the first board is disconnected, resulting in the inability to collect the reverse position status signal after the drive is completed, triggering the master-slave switch. The first board is the main board, and the second board is the standby board. After receiving the drive command from the main control computer, the first board performs the reverse drive operation. After the switch is in place, the first board detects that one of the three-phase drive currents is 0A, and the other two phases are 0.5A. The first board determines that the drive is completed and starts to collect the status signal. Within 1 second after the drive is in place, the X4 cable from the first board to the backplane is disconnected, so the first board cannot collect the status signal, and then the master-slave switch is performed. The second board is upgraded to the main board. The five-way Y1 to Y5 cables from the second board to the backplane are normal, so the second board can collect the reverse position status signal and upload the status signal to the main control computer.

[0047] For example, in the third scenario, the X4 cable of the first board is disconnected during the normal acquisition process, resulting in the loss of the display status signal, triggering the master-slave switch. The first board is the main board, the second board is the standby board, and the switch position is positioning. The first board acquires the positioning display status and synchronizes the display status to the second board. At this time, the X4 cable from the first board to the backplane is disconnected, resulting in the first board not being able to acquire valid displays, triggering and completing the master-slave switch. The second board is upgraded to the main board. Since it takes a certain amount of time (about 0.5s) to establish the display circuit, within 0.5 seconds after the upgrade, the second board uploads the positioning display previously synchronized from the first board to the main control computer. 0.5 seconds after being upgraded to the main board, the display circuit of the second board is communicated and starts uploading the positioning display status acquired by itself.

[0048] For example, in the fourth scenario, the relay drive power supply voltage of the first board is abnormal, resulting in the master-slave switch. The first board is the main board, and the second board is the standby board. The first board and the second board respectively collect the drive power supply voltage, display power supply voltage, and relay drive power supply voltage of their respective systems. When the relay drive power supply voltage of the first board is abnormal and the drive power supply of the second board is normal, the master-slave switch is triggered. The second board is upgraded to the main board and continues to perform the functions of turnout control and display acquisition, ensuring the stable operation of the entire system under a single power supply.

[0049] In summary, the scene detection unit determines the operating state of the mainboard card by acquiring electrical signals from the input and output ends of the mainboard card, and triggers active / standby switching when the operating state is abnormal.

[0050] The present invention uses two boards that communicate with each other as the master and the standby, which can ensure the continuity of the driving process and the acquisition of the display status during switching. By integrating multiple trigger conditions, more scenarios that may cause system failures can be covered, thereby achieving more comprehensive system monitoring and protection. Automatically performing master-standby switching in critical scenarios effectively avoids safety risks caused by system failures and greatly improves the availability of the system. At the same time, since human intervention is reduced, the risk of system failures caused by operational errors is reduced.

[0051] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A fully electronic turnout system, characterized in that: include: A first board and a second board connected to each other for communication, wherein output ends of the first board and the second board are connected to a transfer machine via a backplane; The input end of the first board is connected to a first external power source, and the input end of the second board is connected to a second external power source; A scene monitoring unit, which is in communication with both the first board and the second board, and is used to obtain the operating status of the first board and the second board; The first board synchronizes the turnout driving state and turnout display state to the second board, and the second board synchronizes the external power supply state to the first board; When the monitoring unit detects that the operating state of the first board fails, the first board is switched to a second board that operates normally.

2. The all-electronic turnout system according to claim 1, characterized in that: The scene monitoring unit includes a first scene monitoring unit and a second scene monitoring unit. The first scene monitoring unit is connected to the first board for communication, and the second scene monitoring unit is connected to the second board for communication.

3. The all-electronic turnout system according to claim 1, characterized in that: The first board and the second board are connected via a CAN bus.

4. The all-electronic turnout system according to claim 1, characterized in that: The first external power source and the second external power source both include: a driving power source, a display power source and a relay power source.

5. The all-electronic turnout system according to claim 1, characterized in that: The first board card and the second board card are both connected to the backplane circuit via five routes, a part of which is used for the transmission of turnout drive control signals, and another part of which is used for the transmission of status indication signals.

6. The all-electronic turnout system according to claim 1, characterized in that: The communication cycle between the first board and the second board is 100ms.

7. A method for switching between active and standby boards in a fully electronic turnout system, characterized in that: The fully electronic turnout system according to any one of claims 1 to 6 comprises the following steps: Step 1: monitor the operating status of the first board and the second board in real time through the scene monitoring unit; Step 2: The first board and the second board interact periodically, the first board synchronizes the turnout drive state and the turnout indication state to the second board, and the second board synchronizes the external power supply state to the first board; Step 3: presetting the trigger mechanism of the master-slave switch, including the following trigger conditions: the first board turnout drive fails, the indication state is not obtained, and the first external power supply is abnormal; Step 4: On the premise that the second board is running normally, when any of the trigger conditions is met, the master-slave switching is performed.

8. The method for switching between the main and standby boards of a fully electronic turnout system as claimed in claim 7, characterized in that: Also includes: After the master-slave switch, the second board executes the corresponding instructions according to the operation status of the first board obtained synchronously in the most recent communication cycle.

9. The method for switching between active and standby boards of a fully electronic turnout system as claimed in claim 7, characterized in that: The switch drive failure includes: some of the five routes between the first board and the backplane are disconnected, causing the first scene monitoring unit to obtain currents of some routes higher than normal values, and at least one route current is 0.

10. The method for switching between active and standby boards of a fully electronic turnout system as claimed in claim 7, characterized in that: The failure to acquire the representation status includes the following: some of the five routes between the first board and the backplane are disconnected, resulting in the first board failing to acquire the representation status beyond the preset time, and the first scene monitoring unit obtains that the current of some routes is higher than the normal value, and at least one route current is 0.

11. The method for switching between active and standby boards of a fully electronic turnout system as claimed in claim 7, characterized in that: The uncollected indication state includes: the uncollected indication state after the turnout driving is completed and the uncollected indication state when the turnout is not driven.

12. The method for switching between active and standby boards of a fully electronic turnout system as claimed in claim 7, characterized in that: The external power supply abnormality includes: any one or more of the driving power supply, the display power supply and the relay power supply in the first external power supply are abnormal.

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