Switching device of redundant ground electronic unit and line control system

Abstract

This invention discloses a switching device for redundant ground electronic units, connected between a train control center, redundant ground electronic units, and multiple transponders. The switching device includes: a monitoring module connected to the train control center, used to generate switching signals based on switching commands issued by the train control center to drive the switching module and to feed back the switching status of the switching module to the train control center; and a switching module, whose input is connected to the redundant ground electronic unit and whose output is connected to the transponder, used to switch the connection status between the redundant ground electronic unit and the transponder based on the switching signal. This invention can monitor the connection status between the redundant ground electronic unit and the transponder in real time, ensuring that the switching commands sent by the train control center can be executed effectively and reliably.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a switching device for redundant ground electronic units. Background Technology

[0002] In recent years, with the rapid development of high-speed railways and urban rail transit in my country, train control modes have evolved from manual visual operation to equipment-assisted operation (ATP) and then to automated driving operation (ATO). Some lines have even achieved driverless FAO, with increasing levels of automation, integration, and intelligence. Real-time communication between the train and ground signaling equipment (referred to as train-to-ground) is becoming increasingly important, and its safe, reliable, and low-latency information transmission is one of the key factors in train operation. There are various means of information transmission between the train and ground, such as leaky cabling, wireless WIFI, GSM-R, LTE, and other technologies. Among these, the ground electronic unit (LEU) is also a reliable transmission device.

[0003] A Train Entry End (LEU) is a transmission device that receives data messages from the train control center, processes them, and then sends them to active transponders. It is primarily used to receive data messages from the train control center in real time and transmit them to active transponders, ensuring secure data transmission between the train and the ground. It plays a crucial role in the train operation control system. In my country's CTCS2 and CTCS3 lines, LEUs are widely used in the train operation control systems, especially on the CTCS2 line, where a failure of LEUs can affect the overall operational efficiency of the line. On the CTCS3 line, LEUs serve as a key device for degraded operation mode in the event of wireless communication failure, transmitting critical information such as ground train operation permits and speed limits to the trains in real time, ensuring normal operation of the signaling system even with partial functional loss.

[0004] To ensure that the failure or malfunction of the LEU does not affect the operation of railways or urban rail transit, in areas with high traffic volume, the LEUs are designed with dual-unit hot standby. The two sets of LEUs work in parallel and are connected to four outdoor active transponders through a switching unit (when working normally, only one set of LEUs can send information to the outdoor active transponders alone). A small device suitable for redundant switching of dual sets of LEUs in rail transit needs to be designed.

[0005] However, the existing switching units have the following problems:

[0006] 1. The relays used occupy a large amount of space and have a short service life, requiring regular inspection and replacement;

[0007] Second, some circuit designs are unreasonable, and the switching states are not included in real-time monitoring.

[0008] Third, the external wiring is numerous and consists of loose wires, which is not conducive to equipment maintenance and replacement;

[0009] IV. The switching control and switching components lack electrical isolation. Summary of the Invention

[0010] This invention proposes a switching device and train control system for redundant ground electronic units, which can monitor the status of the switching relay in real time and feed it back to the train control center to ensure that the switching command can be executed effectively and reliably. Furthermore, the monitoring module and the switching module are electrically isolated to enhance stability.

[0011] To achieve the above objectives, this invention proposes a switching device for redundant ground electronic units, which connects the train control center, redundant ground electronic units, and multiple transponders. The redundant ground electronic unit includes a main ground electronic unit and a backup ground electronic unit. The switching device includes:

[0012] The monitoring module is connected to the train control center and is used to generate switching signals according to the switching instructions issued by the train control center to drive the switching module to run and to feed back the switching status of the switching module to the train control center.

[0013] The switching module has its input end connected to the redundant ground electronic unit and its output end connected to the transponder, and is used to switch the connection state between the redundant ground electronic unit and the transponder according to the switching signal.

[0014] Furthermore, the switching device also includes:

[0015] A power module, which provides power to the switching device and redundant ground electronic units;

[0016] An interface module is provided to enable the switching device to connect with the train control center, redundant ground electronic units, and transponders.

[0017] Furthermore, the switching device also includes:

[0018] The base plate is a PCB board, and the monitoring module, switching module, interface module and power module are all integrated on the base plate.

[0019] A mounting bracket is used to fix the base plate to the redundant ground electronic unit.

[0020] Furthermore, the switching module includes: N switching relays, and N loads connected one-to-one with the N switching relays, where N is equal to the number of transponders;

[0021] The input terminals of the N switching relays are connected in parallel to the output terminals of the redundant ground electronic unit, and the output terminals of the N switching relays are respectively connected to one of the transponders and one of the loads.

[0022] Furthermore, in each switching relay: the ground electronic unit main unit is connected to the input terminal of the first normally open contact of the switching relay, and the output terminal of the first normally open contact of the switching relay is connected to the transponder; the ground electronic unit main unit is also connected to the input terminal of the first normally closed contact of the switching relay, and the output terminal of the first normally closed contact of the switching relay is connected to the load; the ground electronic unit backup unit is connected to the input terminal of the second normally open contact of the switching relay, and the output terminal of the second normally open contact of the switching relay is connected to the load; the ground electronic unit backup unit is also connected to the input terminal of the second normally closed contact of the switching relay, and the output terminal of the second normally closed contact of the switching relay is connected to the transponder.

[0023] Furthermore, the monitoring module includes two safety relays, namely a first safety relay and a second safety relay, each of which contains:

[0024] The coil of the safety relay is connected to the train control center;

[0025] N switching relay coils are connected in parallel between the output terminals of the first normally open contact and the second normally open contact of the safety relay.

[0026] The input terminals of the first normally open contact and the second normally open contact of the safety relay are connected to the power supply module.

[0027] Furthermore, the power module includes: a loop-in power supply, a power loop-connection terminal, an air switch, and a power plug-in terminal; the loop-in power supply is connected to the air switch and is connected to the power ports of the ground electronic unit main unit LEU1 and the ground electronic power backup unit LEU2 through the power loop-connection terminal, providing an independent DC24V working power supply for the ground electronic unit LEU equipment; the loop-in power supply also provides excitation power to N switching relays through the power plug-in terminal; the air switch is used to control the working power supply of redundant ground electronic unit LEUs, facilitating the maintenance and replacement of ground electronic unit LEUs.

[0028] Furthermore, the interface module uses an 8-pin row terminal block.

[0029] Based on the same inventive concept, this invention also proposes a train control system, comprising:

[0030] The train control center adopts a two-out-of-two architecture, including a train control center main unit and a train control center backup unit;

[0031] Redundant ground electronic units; and

[0032] The aforementioned switching device includes two safety relays, wherein the first safety relay is connected to the main unit of the train control center, and the second safety relay is connected to the standby unit of the train control center.

[0033] Furthermore, both the main unit and the backup unit of the train control center include:

[0034] A driving device, the driving device being used to generate control commands to drive the coil of the first safety relay or the second safety relay to be energized or de-energized;

[0035] The data acquisition device is connected to N switching relays and a first safety relay or a second safety relay, and is used to acquire the connection status between redundant ground electronic units and transponders.

[0036] Furthermore, the driving device is connected in series with the coil of the first safety relay to form a circuit, or the driving device is connected in series with the coil of the second safety relay to form a circuit.

[0037] Furthermore, the acquisition device is connected in series with the third normally open contacts of N switching relays and the third normally open contact of the first safety relay to form a circuit; or

[0038] The data acquisition device is connected in series with the third normally open contacts of N switching relays and the third normally open contacts of the second safety relay to form a circuit.

[0039] This invention has the following advantages:

[0040] The switching device for redundant ground electronic units provided by the present invention includes a monitoring module and a switching module. The switching module is used to switch the connection status between the redundant ground electronic unit and the transponder. The monitoring module is used to control the operation of the switching module and feed back the switching status of the switching module to the train control center. This enables real-time monitoring of the connection status between the redundant ground electronic unit and the transponder, ensuring that the switching commands sent by the train control center can be executed effectively and reliably.

[0041] Both the monitoring module and the switching module use relays, which provides electrical isolation between them and enhances the stability of the switching device.

[0042] The N switching relays in the switching module are controlled in parallel to avoid inconsistent outputs caused by the excitation time sequence of the relays during the switching process of the cascaded circuit, and to ensure synchronous, fast and stable switching among the N switching relays. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the train control system provided in an embodiment of the present invention;

[0044] Figure 2 This is a schematic diagram showing the connection of each module in the switching device provided in an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of the switching device provided in an embodiment of the present invention;

[0046] Figure 4 This is a schematic diagram illustrating the working principle of the switching relay provided in an embodiment of the present invention;

[0047] Figure 5 This is a circuit diagram for acquiring the switching state of a switching relay provided in an embodiment of the present invention;

[0048] Figure 6 The circuit diagram of the switching device provided in the embodiment of the present invention. Detailed Implementation

[0049] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0050] like Figure 1 As shown, this invention proposes a train control system comprising a train control center (TCC), a redundant ground electronic unit (LEU), and a switching device. The switching device is a key connection between the TCC, the LEU, and the outdoor transponder, used to switch the connection status between the LEU and the transponder.

[0051] The redundant ground electronic unit (LEU) includes a main ground electronic unit (LEU1) and a backup ground electronic unit (LEU2). Both the main LEU1 and the backup LEU2 use redundant power supplies, with their power supply terminals connected in parallel to prevent power loss due to a single point of failure.

[0052] The train control center adopts a 2x2-out-of-2 architecture, comprising a main control center TCC1 and a backup control center TCC2. Both the main control center TCC1 and the backup control center TCC2 include a drive unit and a data acquisition unit. The drive unit generates control commands to drive the switching device, and the data acquisition unit collects the connection status of redundant ground electronic units (LEUs) in real time to ensure consistent drive and data acquisition. In this invention, the train control center adopts a 2x2-out-of-2 architecture, and both the main control center TCC1 and the backup control center TCC2 are connected to the switching device, effectively avoiding gaps in ground electronic unit switching during the dual-machine switching process of the train control center.

[0053] like Figure 1As shown, the input of the switching device is connected to the Train Control Center (TCC) and the redundant ground electronic unit (LEU), while its output is connected to the transponder. The switching device includes a load. When a ground electronic unit fails, the switching device switches the connection status between the main ground electronic unit (LEU1) or the backup ground electronic unit (LEU2) and the transponder or load according to the control command from the train control center. This ensures that one ground electronic unit is connected to the transponder and the other is connected to the load, preventing the output of the other ground electronic unit from being left unconnected. Furthermore, the switching device also sends the switching information of the redundant ground electronic unit (LEU) to the train control center in real time, ensuring the reliable and uninterrupted operation of the train control system.

[0054] like Figure 2-3 As shown, the switching device includes a monitoring module, a switching module, a power supply module, an interface module, and a base plate.

[0055] The monitoring module is connected to the train control center and is used to generate switching signals according to the control commands issued by the train control center to drive the switching module to run, and to feed back the switching status of the switching module to the train control center.

[0056] The input terminal of the switching module is connected to the redundant ground electronic unit, and its output terminal is connected to the transponder. It is used to switch the connection state between the redundant ground electronic unit and the transponder according to the switching signal.

[0057] The power module is connected to the switching module and the redundant ground electronic unit, and is used to supply power to the switching module and the redundant ground electronic unit.

[0058] The interface module provides an interface for the switching device to connect with the Train Control Center (TCC), the redundant ground electronic unit (LEU), and the transponders. The interface module uses an 8-pin terminal block. This 8-pin terminal block includes identification pins and test holes, providing anti-disconnection and anti-misinsertion functions. It solves the problem of scattered transponder interface cables and ground electronic unit input cables, making replacement inconvenient, and reduces on-site wiring work, improving maintenance or replacement efficiency. Furthermore, the interface module has test holes for easy troubleshooting and differentiation between indoor and outdoor faults.

[0059] The base plate is a PCB integrated board, on which the monitoring module, switching module, power module, and interface module are all integrated. Wiring between the various modules of the switching device is completed within the PCB integrated board, requiring only input and output cables, thus solving the problem of numerous and scattered wiring between the existing ground electronic unit (LEU) and the switching unit. Depending on the requirements, the base plate can be directly integrated into the back panel of the ground electronic unit (LEU) chassis or mounted on the ground electronic unit (LEU) cabinet using a mounting bracket.

[0060] Specifically, the switching module includes N switching relays and loads connected one-to-one with each of the N switching relays, where N is greater than or equal to 2. The number of switching relays and loads corresponds to the number of outdoor transponders, and each switching relay controls the input switching between one transponder and the redundant ground electronic unit (LEU). In this embodiment, there are 4 transponders, and the switching module includes 4 switching relays QHJ1 to QHJ4 and 4 loads R1 to R4.

[0061] The N switching relays are controlled in parallel to avoid inconsistencies in external output caused by the relay excitation timing sequence during cascaded circuit switching, ensuring synchronous, rapid, and stable switching among the N switching relays. The input terminal of each switching relay is connected to the output terminals of the ground electronic unit main unit (LEU1) and the ground electronic unit backup unit (LEU2), and the output terminal of each switching relay is connected to the input terminals of the transponder and the load, respectively, allowing the electronic unit main unit (LEU1) and the ground electronic unit backup unit (LEU2) to selectively connect to the transponder or the load. Figure 6 As shown, the ground electronic unit main unit LEU1, the ground electronic unit backup unit LEU2, the switching relay, the transponder, and the load form a switching circuit.

[0062] Furthermore, such as Figure 4 As shown, the positive terminal of the output of the ground electronic unit main unit LEU1 is connected to the input terminal of the normally open contact 1 of the switching relay, and the negative terminal of the output of the ground electronic unit LEU1 is connected to the input terminal of the normally open contact 2 of the switching relay; the positive terminal of the output of the ground electronic unit main unit LEU1 is also connected to the input terminal of the normally closed contact 3 of the switching relay, and the negative terminal of the output of the ground electronic unit LEU1 is also connected to the input terminal of the normally closed contact 4 of the switching relay; the positive terminal of the output of the ground electronic unit backup unit LEU2 is connected to the input terminal of the normally open contact 7 of the switching relay, and the negative terminal of the output of the ground electronic unit backup unit LEU2 is connected to the input terminal of the normally open contact 8 of the switching relay; the positive terminal of the output of the ground electronic unit backup unit LEU2 is also connected to the input terminal of the normally closed contact 5 of the switching relay, and the negative terminal of the output of the ground electronic unit backup unit LEU2 is also connected to the input terminal of the normally closed contact 6 of the switching relay. The normally open contact 1 of the switching relay is connected to the positive terminal of the transponder, and the normally open contact 2 of the switching relay is connected to the negative terminal of the transponder; the normally closed contact 3 of the switching relay is connected to the positive terminal of the load, and the normally closed contact 4 of the switching relay is connected to the negative terminal of the load; the normally closed contact 5 of the switching relay is connected to the positive terminal of the transponder, the normally closed contact 6 of the switching relay is connected to the negative terminal of the transponder, the normally open contact 7 of the switching relay is connected to the positive terminal of the load, and the normally open contact 8 of the switching relay is connected to the negative terminal of the load.

[0063] When the coil of the switching relay is energized, normally open contacts 1, 2, 7, and 8 of the switching relay close, and normally closed contacts 3, 4, 5, and 6 open. The ground electronic unit main unit (LEU1) is connected in series with the transponder via normally open contacts 1 and 2 to form a circuit, and the ground electronic unit backup unit (LEU2) is connected in series with the load via normally open contacts 7 and 8 to form a circuit. When the coil of the switching relay is de-energized, normally open contacts 1, 2, 7, and 8 open, and normally closed contacts 3, 4, 5, and 6 close. The ground electronic unit main unit (LEU1) is connected in series with the load via normally closed contacts 3 and 4 to form a circuit, and the ground electronic unit backup unit (LEU2) is connected in series with the transponder via normally closed contacts 5 and 6 to form a circuit. That is, by controlling the energization or de-energization of the coils of switching relays QHJ1 to QHJ4, the ground electronic unit main unit LEU1 can be switched to the load, and the ground electronic unit standby unit LEU2 can be switched to the transponder.

[0064] The monitoring module includes two safety relays: a first safety relay QHJ5 and a second safety relay QHJ6. The first safety relay QHJ5 is connected to the drive unit of the train control center main unit TCC1, and the second safety relay QHJ6 is connected to the drive unit of the train control center backup unit TCC2. Under the control of the drive unit, the safety relays generate switching signals, which are then applied to the switching module, causing the coils of N switching relays to be energized or de-energized, thus switching the connection status between the redundant ground electronic unit (LEU) and the transponder. Preferably, each safety relay can be connected to an indicator light to visually display its operating status.

[0065] Specifically, the coil of the safety relay is connected to both ends of the driving device, and the normally open contacts of the safety relay are respectively connected to the coils of N switching relays. When the coil of the safety relay is energized under the action of the driving device, the normally open contacts of the safety relay close, thereby energizing the coils of the switching relays. When the coil of the safety relay is de-energized under the action of the driving device, the normally open contacts of the safety relay open, thereby de-energizing the coils of the switching relays. Figure 6 As shown, the drive device, together with the coils of the two safety relays and the N switching relays, forms a switching control circuit.

[0066] Furthermore, such as Figure 6As shown, the first safety relay QHJ5 is connected in series with the drive device of the train control center host TCC1 to form a circuit. The coils of the first switching relays QHJ1 to QHJ4 are connected in parallel between the output terminals of the first normally open contact and the second normally open contact of the first safety relay QHJ5. The input terminals of the first normally open contact and the second normally open contact of the first safety relay QHJ5 are connected to the power supply module. When the coil of the first safety relay QHJ5 is energized by the drive device of the train control center host TCC1, the first and second normally open contacts of the first safety relay QHJ5 close, and a circuit is formed between the normally open contact of the first safety relay QHJ5 and the coils of the first to fourth switching relays, thus energizing the coils of the first to fourth switching relays. When the coil of the first safety relay QHJ5 loses its magnetism under the drive of the train control center host TCC1, the first and second normally open contacts of the first safety relay QHJ5 open, breaking the circuit between the normally open contacts of the first safety relay QHJ5 and the coils of the first to fourth switching relays, thus causing the coils of the first to fourth switching relays to lose their magnetism. Similarly, the connection method of the second safety relay QHJ6 is the same as that of the first safety relay QHJ5, and will not be described again here.

[0067] The power module includes a loop-in power supply, power loop terminals, an air switch, and power plug terminals. The loop-in power supply is connected to an air switch, and after passing through the air switch, it connects to the power ports of the ground electronic unit main unit (LEU1) and the ground electronic power backup unit (LEU2) via the power loop terminals, providing an independent DC 24V operating power supply for the ground electronic unit (LEU) devices. The air switch controls the operating power of the redundant ground electronic unit (LEU), facilitating maintenance and replacement of the ground electronic unit (LEU). The ground electronic unit main unit (LEU1) and the ground electronic power backup unit (LEU2) are connected in parallel across the loop-in power supply in a loop-connected manner. A power outage at any point in the power circuit will not affect the normal power supply of the LEUs, reducing the impact range of fault points in non-loop-connected systems and also reducing the number of cables and interface terminals in a star connection.

[0068] Meanwhile, the loop-in power supply can also provide excitation power to the first switching relay QHJ1 to the fourth switching relay QHJ4 through the power plug-in terminal.

[0069] like Figure 6 As shown, the acquisition device of the train control center is connected in series with the normally open contacts of N switching relays in the switching module and the normally open contacts of two safety relays in the monitoring module to form an acquisition circuit, so as to collect and monitor the working status and control status of the switching relays in real time, ensuring consistent drive acquisition. Specifically, as shown... Figure 5 As shown, the data acquisition device of the train control center host TCC1 is connected in series with the third normally open contact of the first safety relay QHJ5, the normally open contact 9 of the first switching relay QHJ1, the normally open contact 9 of the second switching relay QHJ2, the normally open contact 9 of the third switching relay QHJ3, and the normally open contact 9 of the fourth switching relay QHJ4 to form a circuit. When the drive device excites the coil of the first safety relay QHJ5, the normally open contacts 9 of the first switching relay QHJ1, the second switching relay QHJ2, the third switching relay QHJ3, and the fourth switching relay QHJ4 all close, and the data acquisition circuit is activated. The data acquisition device feeds back the status information of the relays to the train control center host TCC1. If any relay in this circuit fails, the data acquisition circuit will not activate, and the status of the switching relay cannot be fed back to the train control center host TCC1. The train control center TCC1 will then issue a real-time alarm to ensure the safety and reliability of the train control system. Similarly, the connection method of the data acquisition device of the backup TCC2 of the train control center is the same as that of the main TCC1 of the train control center, and will not be described again here.

[0070] The switching device for redundant ground electronic units provided by this invention includes a monitoring module and a switching module. The switching module is used to switch the connection status between the redundant ground electronic units and the transponders. The monitoring module is used to control the operation of the switching module and feed back the switching status of the switching module to the train control center. This enables real-time monitoring of the connection status between the redundant ground electronic units and the transponders, ensuring that the switching commands sent by the train control center can be executed effectively and reliably. Both the monitoring module and the switching module use relays, which provides electrical isolation between them and enhances the stability of the switching device. Furthermore, the N switching relays in the switching module are controlled in parallel to avoid inconsistencies in external output caused by the excitation timing sequence of the relays during the switching process of the cascaded circuit, ensuring synchronous, rapid, and stable switching among the N switching relays.

[0071] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions 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 switching device for redundant ground electronic units, connected between a train control center, redundant ground electronic units, and multiple transponders, wherein the redundant ground electronic unit comprises a ground electronic unit main unit and a ground electronic unit backup unit, characterized in that, The switching device includes: The monitoring module is connected to the train control center and is used to generate switching signals according to the switching instructions issued by the train control center to drive the switching module to run and to feed back the switching status of the switching module to the train control center. The switching module has its input end connected to the redundant ground electronic unit and its output end connected to the transponder, and is used to switch the connection state between the redundant ground electronic unit and the transponder according to the switching signal. The switching module comprises: N switching relays, and N loads connected in a one-to-one correspondence with the N switching relays, where N is greater than or equal to 2; the input terminals of the N switching relays are connected in parallel to the output terminals of the redundant ground electronic unit, and the output terminals of the N switching relays are respectively connected to one of the transponders and one of the loads; And in each switching relay: The ground electronic unit main unit is connected to the input terminal of the first normally open contact of the switching relay, and the output terminal of the first normally open contact of the switching relay is connected to the transponder; the ground electronic unit main unit is also connected to the input terminal of the first normally closed contact of the switching relay, and the output terminal of the first normally closed contact of the switching relay is connected to the load; the ground electronic unit backup unit is connected to the input terminal of the second normally open contact of the switching relay, and the output terminal of the second normally open contact of the switching relay is connected to the load; the ground electronic unit backup unit is also connected to the input terminal of the second normally closed contact of the switching relay, and the output terminal of the second normally closed contact of the switching relay is connected to the transponder. The monitoring module includes at least one safety relay, and each safety relay contains: The coil of the safety relay is connected to the train control center; N switching relay coils are connected in parallel between the output terminals of the first normally open contact and the second normally open contact of the safety relay. The input terminals of the first normally open contact and the second normally open contact of the safety relay are both connected to the power supply module.

2. The switching device as described in claim 1, characterized in that, Also includes: A power module, which provides power to the switching device and redundant ground electronic units; An interface module is provided to enable the switching device to connect with the train control center, redundant ground electronic units, and transponders.

3. The switching device as described in claim 1, characterized in that, Also includes: The base plate is a PCB board, and the monitoring module, switching module, interface module and power module are all integrated on the base plate. A mounting bracket is used to fix the base plate to the redundant ground electronic unit.

4. The switching device as described in claim 2, characterized in that, The interface module uses an 8-pin row of terminals.

5. A train control system, characterized in that, Include: The train control center adopts a two-out-of-two architecture, including a train control center main unit and a train control center backup unit; Redundant ground electronic units; and The switching device as described in any one of claims 1-4; the switching device includes two safety relays, wherein the first safety relay is connected to the main unit of the train control center, and the second safety relay is connected to the standby unit of the train control center.

6. The train control system as described in claim 5, characterized in that, Both the main unit and the backup unit of the train control center include: A driving device, the driving device being used to generate control commands to drive the coil of the first safety relay or the second safety relay to be energized or de-energized; The data acquisition device is connected to N switching relays and a first safety relay or a second safety relay, and is used to acquire the connection status between redundant ground electronic units and transponders.

7. The train control system as described in claim 6, characterized in that, The driving device is connected in series with the coil of the first safety relay to form a circuit, or the driving device is connected in series with the coil of the second safety relay to form a circuit.

8. The train control system as described in claim 6, characterized in that, The data acquisition device is connected in series with the third normally open contacts of N switching relays and the third normally open contact of the first safety relay to form a circuit; or The data acquisition device is connected in series with the third normally open contacts of N switching relays and the third normally open contacts of the second safety relay to form a circuit.

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