A position indication and verification system and method for turnouts of four-wire AC switch machine

Abstract

The present invention discloses a position indication verification system and method for a four-wire AC switch turnout. The verification system comprises: a fully electronic turnout module and a storage module. The fully electronic turnout module is composed of an A‑CPU and a B‑CPU; the storage module is integrated inside the fully electronic turnout module or is an external device; the A‑CPU and the B‑CPU are connected to each other and are respectively connected to the storage module; the A‑CPU communicates with an interlocking control unit A through a communication channel A, and the B‑CPU communicates with an interlocking control unit B through a communication channel B. The verification system of the present invention increases the coupling and verification processing of the switch drive command and the turnout position acquisition information. Only when the operation command received from the interlocking logic control unit is verified with the turnout position indication information, the fully electronic turnout module will upload the turnout position indication information to the interlocking logic control unit. When the line changes and the four-wire AC turnout module collects turnout position information that does not match the command, it will not upload erroneous indication information. The safety of the fully electronic interlocking system can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of railway signals, and more particularly to a position indication and verification system and method for a four-wire AC switch turnout. Background Art

[0002] In recent years, with the rapid development of computer and communication technology, the control of turnout systems has gradually developed from traditional relay circuits to full electronic module control. Fully electronic computer interlocking systems are increasingly used in the field of rail transit. Fully electronic computer interlocking reduces the use of relays, further improves the degree of intelligence, and has a wide range of application scenarios. Turnout control circuits can be mainly divided into four-wire, five-wire and six-wire control circuits. Among them, the more common ones in China are four-wire and six-wire DC switch turnout control circuits and five-wire AC switch turnout control circuits, while the four-wire AC switch turnout control circuit is widely used abroad and is also used in some domestic subway lines. Unlike the four- and six-wire DC and five-wire AC turnout control circuits, the four-wire AC turnout control circuit is due to the internal circuit design of the switch machine. In the scenario where the turnout wiring needs to be reconnected during electrical maintenance or line reconstruction, if two of the wires are connected incorrectly, the turnout positioning and reverse position indication circuits may be inverted, and the information collected by the full electronic turnout module may be confused, thereby greatly increasing the risk of the full electronic interlocking system giving an erroneous indication. At the same time, if the all-electronic module is powered off and restarted, the all-electronic turnout module has no effective and reliable safety protection measures for indicating line wiring errors.

[0003] In the current fully electronic four-wire AC turnout control system, after the interlocking logic control unit issues a turnout control command, the fully electronic four-wire AC turnout module controls the switch to perform the corresponding position conversion according to the command issued by the interlocking; after it is in place, the fully electronic four-wire AC turnout module collects the position information of the switch and sorts out the turnout position information, which is then uploaded to the interlocking logic control unit to finally form the turnout position representation. The system structure is as follows Figure 1 As shown, the command control and position indication information for operating the turnout machine are independent of each other, and there is no logical check between them in the four-wire AC turnout module.

[0004] Therefore, in summary, the prior art has the following defects:

[0005] 1. The logic of position indication and turnout control in the fully electronic four-wire AC turnout module is relatively simple and independent of each other without mutual verification. During the process of electrical maintenance or line reconstruction, any wiring error between the four-wire AC turnout module and the switch machine may directly lead to turnout indication errors and cannot be discovered in time, which may lead to very serious safety accidents.

[0006] 2. Even if the switch operation command and switch position information are verified by software logic in the fully electronic four-wire AC switch module, especially after the four-wire AC switch module is powered off and restarted, the previous operation command cannot be recorded, and the switch position error cannot be identified, which may lead to a major safety accident with vehicle destruction and loss of life. Summary of the invention

[0007] In view of this, the present invention provides a position indication verification system and method for a four-wire AC switch turnout, which can at least partially solve the above technical problems and improve the safety of the full electronic interlocking system.

[0008] In order to achieve the above object, the present invention adopts the following technical solution:

[0009] In a first aspect, an embodiment of the present invention provides a position indication verification system for a four-wire AC switch machine turnout, comprising: a fully electronic turnout module and a storage module, wherein the fully electronic turnout module is composed of an A-CPU and a B-CPU; the storage module is integrated inside the fully electronic turnout module or is an external device; the A-CPU and the B-CPU are connected to each other and are respectively connected to the storage module;

[0010] Wherein, the A-CPU communicates with the interlocking control unit A through the communication channel A, and the B-CPU communicates with the interlocking control unit B through the communication channel B;

[0011] When the fully electronic turnout module receives the turnout operation command issued by the interlocking logic control unit A or B, and the turnout action is completed, the A-CPU writes the operation command received by itself into the first position of the storage module, and the B-CPU writes the operation command received by itself into the second position of the storage module;

[0012] Before the fully electronic turnout module gives the final turnout position indication information, A-CPU and B-CPU respectively read the operation commands of the two positions of the storage module, and obtain the position information of the turnout machine, and compare and verify them with each other to generate a safe final turnout position indication information and upload it to the interlocking logic control unit A or B.

[0013] Furthermore, the first position of the storage module is for A-CPU to write and for A-CPU and B-CPU to read; the second position of the storage module is for B-CPU to write and for A-CPU and B-CPU to read.

[0014] Furthermore, the storage module is any one of the following:

[0015] Relay, cloud platform and non-volatile memory; the non-volatile memory includes: erasable ROM, FLASH and U disk.

[0016] Furthermore, the A-CPU and the B-CPU periodically read the operation command in the storage module when the turnout is not in motion, and perform verification of the operation command and position indication information.

[0017] Furthermore, it also includes: when the fully electronic turnout module is powered off and restarted, when the turnout position information is collected, the A-CPU and B-CPU will respectively read the turnout operation command from the storage module again, and respectively verify the turnout position information with the stored operation command. When the A-CPU and B-CPU pass the verification respectively, and the corresponding turnout position information of the two is the same, the fully electronic turnout module generates safe turnout position representation information.

[0018] In a second aspect, an embodiment of the present invention further provides a method for verifying the position representation of a four-wire AC switch turnout, using the position representation verification system of a four-wire AC switch turnout as described in any one of the first aspects above, the method comprising the following steps:

[0019] The fully electronic turnout module receives the turnout operation command issued by the interlocking logic control unit A or B, and the turnout action is completed;

[0020] The A-CPU writes the received operation command into the first position of the storage module, and the B-CPU writes the received operation command into the second position of the storage module;

[0021] Before the fully electronic turnout module gives the final turnout position indication information, the A-CPU and the B-CPU read out the operation commands stored in the first position and the second position respectively;

[0022] A-CPU and B-CPU respectively determine whether the operation commands stored in the first position and the second position read by each of them are consistent;

[0023] When the A-CPU judges that they are consistent, it will check the operation command read by itself with the position information of the turnout switch machine; when the B-CPU judges that they are consistent, it will check the operation command read by itself with the position information of the turnout switch machine; the checking process of A-CPU and B-CPU is regarded as the first stage of checking;

[0024] When the A-CPU passes the verification, the first turnout position information is generated; when the B-CPU passes the verification, the second turnout position information is generated;

[0025] When the first turnout position indication information and the second turnout position indication information are consistent, the second stage verification is completed;

[0026] When the second stage verification is passed, A-CPU and B-CPU upload the first and second turnout position representation information generated by themselves to the corresponding interlocking logic control units A and B respectively.

[0027] Furthermore, it also includes:

[0028] During the period when the turnout is not in motion, the A-CPU and the B-CPU periodically read the operation commands in the storage module, and periodically perform the first-stage and second-stage operation command and position indication information verification.

[0029] Furthermore, it also includes:

[0030] When the fully electronic turnout module is powered off and restarted, and the turnout position information is collected, the A-CPU and B-CPU will respectively read the turnout operation command from the storage module again, and perform the first stage and second stage verification of the turnout position information and the stored operation command respectively.

[0031] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a position indication verification system for a four-wire AC switch turnout, which can improve the safety of the full electronic interlocking system. Safe indication information is output only when the operation command and the position indication information are verified. Even after the system is powered off and restarted, the record of the previous operation command can still be maintained to prevent position indication errors caused by incorrect wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 The figure is a schematic diagram of the structure of a fully electronic four-wire AC turnout control system in the prior art.

[0034] Figure 2 The present invention provides a four-wire AC switch turnout position indication verification system structure and interaction schematic diagram.

[0035] Figure 3 A flow chart of a method for verifying the position of a turnout of a four-wire AC switch provided by an embodiment of the present invention;

[0036] Figure 4 A logic principle diagram of the verification mechanism using A-CPU as an example provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] The embodiment of the present invention discloses a position indication verification system for a four-wire AC switch machine turnout, comprising: a full electronic turnout module and a storage module; the full electronic turnout module is composed of an A-CPU and a B-CPU; Figure 2 As shown, the storage module is integrated inside the full electronic turnout module, using non-volatile memory (such as erasable ROM, FLASH, USB flash drive, etc.), or other signal system storage, using peripherals such as relays and cloud platform storage; A-CPU and B-CPU are connected to each other and are respectively connected to the storage module;

[0040] Among them, A-CPU communicates with interlocking control unit A through communication channel A, and B-CPU communicates with interlocking control unit B through communication channel B;

[0041] When the fully electronic turnout module receives the turnout operation command issued by the interlocking logic control unit A or B, and the turnout action is completed, the A-CPU writes the operation command received by itself into the first position of the storage module, and the B-CPU writes the operation command received by itself into the second position of the storage module;

[0042] Before the fully electronic turnout module gives the final turnout position indication information, A-CPU and B-CPU respectively read the operation commands of the two positions of the storage module, and obtain the position information of the turnout machine, and compare and verify them with each other to generate the safe final turnout position indication information and upload it to the interlocking logic control unit A or B.

[0043] Specific reference Figure 2 As shown, after the all-electronic turnout module receives the turnout operation command issued by the interlocking logic control unit and the turnout action is completed, A-CPU writes the operation command received by this CPU into position 1 of the non-volatile memory, and B-CPU writes the operation command received by this CPU into position 2 of the non-volatile memory. Position 1 of the non-volatile memory can be written by A-CPU and can be read by A-CPU and B-CPU; position 2 of the non-volatile memory can be written by B-CPU and can be read by A-CPU and B-CPU.

[0044] Before the full electronic turnout module gives the final turnout position information, A-CPU reads out the operation commands stored in position 1 and position 2 of the non-volatile memory and compares them. B-CPU also performs the same operation. After comparing the operation commands stored in the two positions and finding that they are consistent, the operation command is checked with the turnout position information determined by the current full electronic turnout module. If the fixed operation command is read out, the turnout position determined at this time should be fixed position; on the contrary, if the reverse operation command is read out, the turnout position determined at this time should be reverse position. In these two cases, it is considered that the first stage verification has passed; then A-CPU and B-CPU will interactively compare their position information that has passed the first stage verification. If the position information of the two CPUs is consistent, the second stage verification has passed. At this time, the two CPUs will send corresponding information to the interlocking logic control units A and B respectively through communication channels A and B to ensure the high security of the turnout position information.

[0045] During the period when the turnout is not in motion, both CPUs periodically read the operation command information in the non-volatile memory and regularly perform command and position verification of stage one and stage two to ensure that the information in the memory has not been abnormally tampered with.

[0046] When the fully electronic turnout control module is powered off and restarted, when the turnout indication information is collected, the turnout control command will be read from the storage unit again to perform a check between the indication information and the stored operation commands in phases one and two. Only when the check passes can safe indication information be generated.

[0047] The position indication verification system of the four-wire AC switch provided by the present invention increases the coupling and verification processing of the switch drive command and the switch position acquisition information. Only when the operation command received from the interlocking logic control unit is verified with the switch position indication information, the full electronic switch module will upload the switch position indication information to the interlocking logic control unit. When the line changes and the full electronic switch module collects the switch position information that does not match the command, it will not upload the wrong indication information. That is: simply connecting the switch line incorrectly (the acquisition position and the operation command verification fail), the wrong position indication information cannot be output.

[0048] In addition, when the fully electronic turnout module is powered off and restarted, it can still retain the previously received turnout operation command for verification with the current turnout position, preventing incorrect wiring from causing the fully electronic turnout module to upload incorrect position information. Overall, it can improve the safety of the fully electronic interlocking system.

[0049] Embodiment 2:

[0050] The present invention also provides a method for verifying the position indication of a four-wire AC switch turnout, using the position indication verification system of the four-wire AC switch turnout of the above embodiment 1, referring to Figure 3 As shown, the method comprises the following steps:

[0051] S1. The fully electronic turnout module receives the turnout operation command issued by the interlocking logic control unit A or B, and the turnout action is completed;

[0052] S2, A-CPU writes the received operation command into the first position of the storage module, and B-CPU writes the received operation command into the second position of the storage module;

[0053] S3, before the fully electronic turnout module gives the final turnout position indication information, the A-CPU and the B-CPU read out the operation commands stored in the first position and the second position respectively;

[0054] S4, A-CPU and B-CPU respectively determine whether the operation commands stored in the first position and the second position read by each of them are consistent;

[0055] S5. When the A-CPU judges that they are consistent, it verifies the operation command read by itself with the position information of the turnout switch machine; when the B-CPU judges that they are consistent, it verifies the operation command read by itself with the position information of the turnout switch machine; the verification process of A-CPU and B-CPU is regarded as the first stage verification;

[0056] S6. When the A-CPU passes the verification, the first turnout position information is generated; when the B-CPU passes the verification, the second turnout position information is generated;

[0057] S7, when the first turnout position indication information and the second turnout position indication information are consistent, the second stage verification is completed;

[0058] S8. After the second stage verification is passed, A-CPU and B-CPU upload the first and second turnout position representation information generated by themselves to the corresponding interlocking logic control units A and B respectively.

[0059] In addition, during the period when the turnout is not in motion, the A-CPU and the B-CPU periodically read the operation commands in the storage module and periodically perform the first-stage and second-stage operation command and position indication information verification.

[0060] When the fully electronic turnout module is powered off and restarted, and the turnout position information is collected, A-CPU and B-CPU will read the turnout operation command from the storage module respectively, and perform the first and second stage verification of the turnout position information and the stored operation command respectively.

[0061] The method realizes the verification of the operation command of the four-wire AC switch machine turnout and the turnout position indication information. Only when the operation command and the indication information are verified, the position indication information can be sent to the interlocking logic control unit; the safety is further improved. In addition, the turnout operation command issued by the interlocking logic control unit can be stored, and the system power failure will not cause the loss of the previous operation command. The system power failure and restart can still realize the verification of the turnout operation command and the indication information.

[0062] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0063] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for checking the position indication of a four-wire AC switch, characterized in that: The position indication verification system of the four-wire AC switch machine turnout used comprises: a full electronic turnout module and a storage module, wherein the full electronic turnout module is composed of an A-CPU and a B-CPU; the storage module is integrated inside the full electronic turnout module or is an external device; the A-CPU and the B-CPU are connected to each other and are respectively connected to the storage module; Wherein, the A-CPU communicates with the interlocking control unit A through the communication channel A, and the B-CPU communicates with the interlocking control unit B through the communication channel B; When the fully electronic turnout module receives the turnout operation command issued by the interlocking logic control unit A or B, and the turnout action is completed, the A-CPU writes the operation command received by itself into the first position of the storage module, and the B-CPU writes the operation command received by itself into the second position of the storage module; Before the fully electronic turnout module gives the final turnout position indication information, the A-CPU and the B-CPU respectively read the operation commands of the two positions of the storage module, and obtain the position information of the turnout switch machine, and compare and verify each other, and then generate the safe final turnout position indication information and upload it to the interlocking logic control unit A or B; The specific position representation verification method includes the following steps: The fully electronic turnout module receives the turnout operation command issued by the interlocking logic control unit A or B, and the turnout action is completed; The A-CPU writes the received operation command into the first position of the storage module, and the B-CPU writes the received operation command into the second position of the storage module; Before the fully electronic turnout module gives the final turnout position indication information, the A-CPU and the B-CPU read out the operation commands stored in the first position and the second position respectively; A-CPU and B-CPU respectively determine whether the operation commands stored in the first position and the second position read by each of them are consistent; When the A-CPU judges that they are consistent, it will check the operation command read by itself with the position information of the turnout switch machine; when the B-CPU judges that they are consistent, it will check the operation command read by itself with the position information of the turnout switch machine; the checking process of A-CPU and B-CPU is regarded as the first stage of checking; When the A-CPU passes the verification, the first turnout position information is generated; when the B-CPU passes the verification, the second turnout position information is generated; When the first turnout position indication information and the second turnout position indication information are consistent, the second stage verification is completed; When the second stage verification is passed, A-CPU and B-CPU upload the first and second turnout position representation information generated by themselves to the corresponding interlocking logic control units A and B respectively.

2. A method for checking the position indication of a turnout of a four-wire AC switch according to claim 1, characterized in that: Also includes: During the period when the turnout is not in motion, the A-CPU and the B-CPU periodically read the operation commands in the storage module, and periodically perform the first-stage and second-stage operation command and position indication information verification.

3. A method for checking the position indication of a turnout of a four-wire AC switch according to claim 2, characterized in that: Also includes: When the fully electronic turnout module is powered off and restarted, and the turnout position information is collected, the A-CPU and B-CPU will respectively read the turnout operation command from the storage module again, and perform the first stage and second stage verification of the turnout position information and the stored operation command respectively.

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