Isolated parallel alarm platform door redundancy control system and control method thereof

Abstract

The invention relates to the technical field of rail operation, in particular to a platform door redundancy control system with an isolated parallel alarm function and a control method thereof. Sliding door opening and closing control commands in the platform door system are divided into two paths, the two paths of sliding door opening and closing commands are controlled through the two PEDCs respectively, and the two PEDCs receive the relevant opening and closing control commands of the platform door system at the same time and then send the sliding door opening and closing control commands to the DCU respectively. After the DCU receives the door opening and closing command, a sliding door is controlled to execute door opening and closing actions according to a specific command of the door opening and closing command, and when an abnormal command is received, a processing strategy matched with a judgment result is searched in a preset processing strategy table to execute the door opening and closing actions; the two control loops are completely independent, the DCU and the industrial personal computer search the processing strategy matched with the judgment result in the preset processing strategy table according to the actual on-site state information, normal execution of the functions of the platform door system can be achieved, meanwhile, the abnormal loop is alarmed, and the operation reliability of the platform door system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of platform door system safety control, and in particular to a platform door redundant control system with isolated parallel alarm and a control method thereof. Background Art

[0002] The platform door system is installed at the edge of the platform of stations along the urban rail transit line to isolate the platform waiting area from the track driving area. It corresponds to the train door and is an electromechanical equipment system. The application of platform doors isolates passengers from tracks and trains, improves the operational safety factor, improves the platform environment for passengers to wait, and is also conducive to saving operating and construction costs. The opening and closing of the platform doors are generally carried out in coordination with the movement of the train doors when the train arrives at the station, providing passengers with a passage to get on and off the train.

[0003] The door opening and closing command failures of the entire side of the platform door system include three types of failures: open circuit, short circuit and the door opening and closing command cannot disappear. When related failures occur, the entire side or multiple sliding doors will be unable to link the door opening and closing failures on site. The emergency handling time for this type of failure is long and it is very likely to cause train delays. Regarding the optimization of the door opening and closing commands of the platform door system, the currently commonly used method is to increase redundant control units and increase control command loops to improve the reliability of the door opening and closing commands of the platform door system.

[0004] By analyzing the method of adding redundant control units and increasing control command loops, it is found that this control method has the following problems: When a circuit breaker fault occurs, due to the existence of the control loop, the control command can be sent to the sliding doors on both sides of the breakpoint through two loops respectively, and the control of the sliding doors on the entire side is not affected; but at this time the breakpoint fault is a hidden fault, and the fault has not been resolved. When the circuit breaker fault occurs again on site, the sliding doors between the two breakpoints will fail to work in conjunction, which will manifest on site as multiple consecutive sliding doors failing to work in conjunction.

[0005] When a short circuit occurs, the door opening and closing command protection circuit is activated, resulting in the failure of the sliding doors on the entire side to be able to work in conjunction. The on-site manifestation is that the sliding doors on the entire side cannot be able to work in conjunction.

[0006] When the door opening and closing command cannot disappear, the door opening command or door closing command received by the DCU always exists. When the platform door system sends the door opening and closing command, the door opening and closing commands will exist at the same time. After receiving the erroneous command, the DCU will maintain the corresponding state of the previous control command. The on-site manifestation is that the sliding door on the entire side cannot be linked.

[0007] Therefore, we need a platform door redundant control system with isolated parallel alarm and its control method. Summary of the invention

[0008] In order to solve the disadvantages and deficiencies existing in the prior art of the platform screen door system, the present invention provides a platform screen door redundant control system with isolated parallel alarm and a control method thereof, which has a reasonable structural design and improves the operation reliability of the platform screen door system.

[0009] The present invention adopts the following technical solutions to achieve the above object: A platform screen door redundant control system with isolated parallel alarm, the control system includes an industrial control computer, a PEDC, a door opening and closing control loop and a DCU; the industrial control computer is respectively connected to two PEDCs, and the status information during the operation of the platform screen door system is uploaded to the industrial control computer through the two PEDCs respectively. After receiving the PEDC status, the industrial control computer compares the status information. When the two statuses are consistent, the system normally displays and records the status information; when the two statuses are inconsistent, the processing strategy matching the judgment result is searched in the preset processing strategy table for display and recording of the status information; the control of the unilateral sliding door is carried out by the two PEDCs at the same time. After receiving the door opening and closing control command issued by any one of the signal system SIG, the local control panel PSL, and the emergency control panel IBP, the PEDC processes through the internal circuit and sends the sliding door opening and closing control command to the DCU through the two control loops respectively; wherein, the door opening and closing control loop adopts two independent first control loops and second control loops for sending the sliding door opening and closing control command issued by the PEDC to the DCU; the DCU is provided with independent status detection circuits for the two loops, and the two detection circuits can respectively read the status of the two loops. After receiving the door opening and closing command, the DCU controls the sliding door to perform the door opening and closing action according to the specific command of the door opening and closing command. When the DCU receives a normal command, it normally performs the sliding door opening and closing action; when it receives an abnormal command, it searches in the preset processing strategy table for the processing strategy matching the judgment result to perform the door opening and closing action.

[0010] As a preferred technical solution: the PEDC is divided into a main PEDC and a secondary PEDC; when the industrial control computer receives the PEDC status, when the two PEDC statuses are consistent, the software normally displays and records the status information; when the statuses are inconsistent, the software log records both records at the same time and indicates the record source. The software interface display executes the corresponding display scheme according to the different status types. When there is a fault status in the status, the software interface displays the corresponding fault status. When there is a status inconsistent with the default working status in the status, the inconsistent status is displayed. When there is no status feedback in the status, the status with feedback is displayed. When there are two statuses inconsistent with the default working status at the same position, the main PEDC status is displayed.

[0011] A further preferred technical solution: the DCU is provided with a normal signal for the state of a door opening and closing command. When the DCU receives a normal signal for the state of a door opening and closing command, it sends a normal signal for the state of a door opening and closing command to the subsequent sliding door DCU. When the subsequent sliding door receives an abnormal signal for the state of a door opening and closing command and receives a normal signal for the state of a door opening and closing command from the previous sliding door DCU, it is determined that there is an abnormality in the door opening and closing command between the sliding door at this level and the previous sliding door, and status information is fed back according to the processing strategy in the preset processing strategy table. When the subsequent sliding door receives an abnormal signal for the state of a door opening and closing command but does not receive a normal signal for the state of a door opening and closing command from the previous sliding door DCU, it is determined that there is no abnormality in the door opening and closing command between the sliding door at this level and the previous sliding door, and the corresponding door opening and closing action is performed according to the processing strategy in the preset processing strategy table.

[0012] A further preferred technical solution: when the DCU does not set a normal signal for the door opening and closing command status, when the industrial computer receives an abnormal door opening and closing command feedback from the sliding door DCU, the status of the current sliding door is compared with that of the previous sliding door. When the status is inconsistent, the abnormal door opening and closing status of the current sliding door is displayed; when the status is consistent, the abnormal door opening and closing status of the current sliding door is not displayed.

[0013] Further preferred technical solution: the control system also includes a redundant control module. In this mode, the industrial computer is connected to the PEDC, and the status information of the platform door system during operation is uploaded to the industrial computer through the PEDC; the control of the single-sided sliding door is performed simultaneously by the PEDC and the redundant control module.

[0014] A control method for a platform door redundant control system with isolated parallel alarm, using the above control system, comprises the following steps: S1: Initialization settings: DCU periodically reads the door opening command K1 and door closing command G1 in the first control loop; the door opening command K2 and door closing command G2 in the second control loop; S2: When receiving the K1 and K2 states but not the G1 and G2 states, it is determined that both control loops are normal and the DCU executes the door opening command normally; S3: When receiving the G1 and G2 states but not the K1 and K2 states, it is determined that both control loops are normal and the DCU executes the door closing command normally; S4: When the K1 state is received but the K2, G1, and G2 states are not received, it is determined that the second control loop door opening command is faulty, and the DCU executes the door opening command normally and feedbacks the second control loop door opening command fault; S5: When the K2 state is received but the K1, G1, and G2 states are not received, it is determined that the first control loop door opening command is faulty, and the DCU executes the door opening command normally and feedbacks the first control loop door opening command fault; S6: When the G1 status is received but the K1, K2, and G2 statuses are not received, it is determined that the closing command of the second control loop is faulty. The DCU normally executes the closing command and feedbacks the fault of the closing command of the second control loop. S7: When the G2 status is received but the K1, K2, and G1 statuses are not received, it is determined that the closing command of the first control loop is faulty. The DCU normally executes the opening command and feedbacks the fault of the closing command of the first control loop. S8: When the K1 or K2 status has not disappeared and either the G1 or G2 status is received, it is determined that the opening commands of the first and second control loops are faulty. After receiving either the G1 or G2 status, the DCU executes the closing command and feedbacks the loop fault status. After either the G1 or G2 status disappears, the DCU executes the opening command and feedbacks the loop fault status. The fault status is the same as when neither K1 nor K2 is received. S9: When the K1 and K2 statuses have not disappeared and the G1 and G2 statuses are received, it is determined that the opening commands of the first and second control loops are faulty. After receiving the G1 and G2 statuses, the DCU executes the closing command and feedbacks the loop fault status. After the G1 and G2 statuses disappear, the DCU executes the opening command. S10: When either the G1 or G2 status has not disappeared and either the K1 or K2 status is received, it is determined that the closing command of either the first or second control loop is faulty. After receiving the K1 and K2 statuses, the DCU executes the opening command and feedbacks the loop fault status. After either the K1 or K2 status disappears, the DCU executes the closing command and feedbacks the loop fault status. The fault status is the same as when neither the G1 nor G2 status is received. S11: When the G1 and G2 statuses have not disappeared and the K1 and K2 statuses are received, it is determined that the closing commands of the first and second control loops are faulty. After receiving the K1 and K2 statuses, the DCU executes the opening command and feedbacks the loop fault status. After the G1 and G2 statuses disappear, the DCU executes the closing command.

[0015] Further preferred technical solution: If any of the situations of K1, G1; K2, G2; K1, G2; K2, G1 occur simultaneously in this control system, the DCU automatically shields the simultaneously occurring opening and closing commands, executes the non-simultaneously occurring opening and closing commands, and feedbacks the fault status.

[0016] Further preferred technical solution: If any of the situations of K1, G1; K2, G2; K1, G2; K2, G1 occur simultaneously in this control system, the DCU automatically shields the simultaneously occurring opening and closing commands, executes the non-simultaneously occurring opening and closing commands, and feedbacks the fault status.

[0017] Further preferred technical solution: The control system can shield the detection of K1, K2, G1, and G2 by the DCU. The shielding function cannot shield any one of two opening commands or two closing commands at the same time. The commands after shielding will no longer affect the various functions of the DCU.

[0018] Further preferred technical solution: When opening the door, if both K1 and K2 are normal, and when an abnormality occurs in either K1 or K2 after the DCU receives the closing command, the DCU may not perform the sliding door opening action; when closing the door, if both G1 and G2 are normal, and when an abnormality occurs in either G1 or G2 after the DCU receives the opening command, the DCU may not perform the sliding door closing action.

[0019] Further preferred technical solution: The working process of the DCU when receiving the enable and door opening control commands is as follows: A1: Initialization settings: The DCU periodically reads the enable command S1 and the door opening command K1 in the first control loop; the enable command S2 and the door opening command K2 in the second control loop; A2: When the states of S1 and S2 are received but the states of K1 and K2 are not received, it is determined that both control loops are normal, and the DCU normally executes the closing command; A3: When the states of S1 and S2 are received and the states of K1 and K2 are received at the same time, it is determined that both control loops are normal, and the DCU normally executes the opening command; A4: When the states of K1 and K2 are received but the states of S1 and S2 are not received, it is determined that there is a failure in the door opening commands of both control loops, and the DCU maintains the previous command state and feedbacks the failure of the door opening commands of both control loops; A5: When the state of S1 is received but the states of S2, K1, and K2 are not received, it is determined that there is a failure in the enable command of the second control loop, and the DCU executes the closing command and feedbacks the failure of the enable command of the second control loop; A6: When the state of S2 is received but the states of S1, K1, and K2 are not received, it is determined that there is a failure in the enable command of the first control loop, and the DCU executes the closing command and feedbacks the failure of the enable command of the first control loop; A7: When the state of either K1 or K2 is received but the states of S1 and S2 are not received, it is determined that there is a failure in the door opening command of either the first control loop or the second control loop, and the DCU maintains the previous command state and feedbacks the loop failure state, and the failure state is the loop of the received loop state; A8: When the state of either S1 or S2 is received and the state of either K1 or K2 is received at the same time, it is determined that there are failures in the enable command and the door opening command of both loops, and the DCU executes the opening command and feedbacks the loop failure state, and the failure state is the loop of the non-received loop state; A9: When receiving K1 and K2 while receiving either S1 or S2, it is determined that the enabling commands of the first control loop and the second control loop are faulty. The DCU executes the door opening command and feeds back the loop fault status, and the fault status is the loop that has not received the loop status. A10: When receiving S1 and S2 while receiving either K1 or K2, it is determined that the door opening command of either the first control loop or the second control loop is faulty. The DCU executes the door opening command and feeds back the loop fault status, and the fault status is the loop that has not received the loop status.

[0020] The beneficial effects of the present invention compared with the prior art are as follows: The present invention adopts two completely independent loops for control. When an abnormality occurs in a single loop, it cannot affect the normal transmission of the status of the other loop. When the DCU receives an abnormal command, it can find the processing strategy matching the judgment result in the preset processing strategy table and execute the door opening and closing actions. The failure of a single loop does not affect the sliding door function. The DCU of the present invention has a loop abnormality alarm function. When a loop abnormality occurs, it can feedback the abnormality status information to the industrial control computer to remind the maintenance personnel to handle the fault in time, avoiding the influence of the sliding door opening and closing function caused by the failure of latent faults not being resolved in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is the overall structure connection flow principle block diagram of the control system of the present invention; Figure 2 It is the structure block diagram of the dual PEDC mode of the present invention; Figure 3 It is the processing strategy chart of the DCU of the present invention receiving the door opening and closing control command; Figure 4 It is the processing strategy chart of the DCU of the present invention receiving the enabling + door opening control command; Figure 5 It is the structure block diagram of the single PEDC mode of the present invention; Figure 6 It is the structure block diagram of the PEDC + redundant control module mode of the present invention.

[0023] In the figure: 1 - industrial control computer, 2 - PEDC, 3 - door opening and closing control loop, 4 - DCU, 5 - first control loop, 6 - second control loop, 7 - main PEDC, 8 - secondary PEDC, 9 - redundant control module. Detailed implementation manners

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that in the specific implementation manners of the present invention, relational terms such as "first" and "second" that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof may be intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitations, the elements defined by the statement "including one" etc. do not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0026] In the description of the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "provided with" may be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, or it may be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] Embodiment 1: As Figures 1 to 4 shown:[[]]END]] A platform door redundant control system with isolated parallel alarm, the control system comprises an industrial computer 1, PEDC2, a door switch control circuit 3 and a DCU4; the industrial computer 1 is connected to two PEDC2s respectively, and the status information of the platform door system during operation is uploaded to the industrial computer 1 through the two PEDC2s respectively. After receiving the PEDC2 status, the industrial computer 1 compares the status information. When the two statuses are consistent, the system displays and records the status information normally; when the two statuses are inconsistent, the processing strategy matching the judgment result is searched in the preset processing strategy table to display and record the status information. Among them, the control of the single-side sliding door of the platform door system (existing technology) is carried out simultaneously by two PEDC2s. After receiving the door opening and closing control command issued by any of the signal system SIG, the local control panel PSL, and the emergency control panel IBP, PEDC2 sends the sliding door door opening and closing control command to DCU through two control loops after internal circuit processing; wherein, the door opening and closing control loop 3 adopts two independent first control loops 5 and second control loops 6, which are used to send the sliding door door opening and closing control command issued by PEDC to DCU4; DCU4 is provided with independent status detection circuits for the two loops, and the two detection circuits can read the status of the two loops respectively. After receiving the door opening and closing command, DCU controls the sliding door to perform the door opening and closing action according to the specific command of the door opening and closing command. When DCU receives a normal command, it executes the sliding door door opening and closing action normally; when receiving an abnormal command, it searches the preset processing strategy table for a processing strategy that matches the judgment result to execute the door opening and closing action. Specifically, Figure 2 The structural block diagram of the dual PEDC mode is shown.

[0028] Preferably, the DCU4 is provided with a normal door opening and closing command state signal. When the DCU4 receives a normal door opening and closing command, it sends a normal door opening and closing command state signal to the subsequent sliding door DCU. When the subsequent sliding door receives an abnormal door opening and closing command and receives a normal door opening and closing command state signal sent by the previous sliding door DCU4, it is determined that there is an abnormality in the door opening and closing command between the current sliding door and the previous sliding door, and the state information is fed back according to the processing strategy in the preset processing strategy table. When the subsequent sliding door receives an abnormal door opening and closing command but does not receive a normal door opening and closing command state signal sent by the previous sliding door DCU4, it is determined that there is no abnormality in the door opening and closing command between the current sliding door and the previous sliding door, and the corresponding door opening and closing action is performed according to the processing strategy in the preset processing strategy table.

[0029] At the same time, when the DCU4 does not set the normal door opening and closing command status signal, when the industrial computer receives the abnormal door opening and closing command feedback from the sliding door DCU4, it compares the status of the current sliding door with that of the previous sliding door. When the status is inconsistent, the abnormal door opening and closing status of the current sliding door is displayed; when the status is consistent, the abnormal door opening and closing status of the current sliding door is not displayed.

[0030] In this embodiment, the PEDC2 is divided into a main PEDC7 and a secondary PEDC8; when the industrial control computer 1 receives the status of the PEDC2, when the statuses of the two PEDC2s are the same, the software normally displays and records the status information. When the statuses are inconsistent, the software log records both records and indicates the recording source, and the software interface displays the corresponding display scheme according to the status type. When there is a fault status in the status, the software interface displays the corresponding fault status. When there is a status inconsistent with the default working status in the status, the inconsistent status is displayed. When there is no status feedback in the status, the status with feedback is displayed. When there are two statuses inconsistent with the default working status at the same position, the status of the main PEDC7 is displayed.

[0031] As shown in the processing strategy chart for the switch door control command received by the DCU Figure 3 shown: A control method for a redundant control system of platform doors with isolation and parallel connection alarm. Using the above control system, the specific process includes the following steps: S1: Initialization settings: The DCU periodically reads the door opening command K1 and door closing command G1 in the first control loop 5; the door opening command K2 and door closing command G2 in the second control loop 6; S2: When the statuses of K1 and K2 are received but the statuses of G1 and G2 are not received, it is determined that both control loops are normal, and the DCU normally executes the door opening command; S3: When the statuses of G1 and G2 are received but the statuses of K1 and K2 are not received, it is determined that both control loops are normal, and the DCU normally executes the door closing command; S4: When the status of K1 is received but the statuses of K2, G1, and G2 are not received, it is determined that the door opening command of the second control loop is faulty, and the DCU normally executes the door opening command and feedbacks the fault of the door opening command of the second control loop; S5: When the status of K2 is received but the statuses of K1, G1, and G2 are not received, it is determined that the door opening command of the first control loop is faulty, and the DCU normally executes the door opening command and feedbacks the fault of the door opening command of the first control loop; S6: When the status of G1 is received but the statuses of K1, K2, and G2 are not received, it is determined that the door closing command of the second control loop is faulty, and the DCU normally executes the door closing command and feedbacks the fault of the door closing command of the second control loop; S7: When the status of G2 is received but the statuses of K1, K2, and G1 are not received, it is determined that the door closing command of the first control loop is faulty, and the DCU normally executes the door opening command and feedbacks the fault of the door closing command of the first control loop; S8: When the states of K1 or K2 have not disappeared and the state of either G1 or G2 is received, it is determined that there is a failure in the opening commands of the first control loop and the second control loop. After receiving the state of either G1 or G2, the DCU executes the closing command and feeds back the loop failure state. After the state of either G1 or G2 disappears, the DCU executes the opening command and feeds back the loop failure state. The failure state is the same as when neither K1 nor K2 is received. S9: When the states of K1 and K2 have not disappeared and the states of G1 and G2 are received, it is determined that there is a failure in the opening commands of the first control loop and the second control loop. After receiving the states of G1 and G2, the DCU executes the closing command and feeds back the loop failure state. After the states of G1 and G2 disappear, the DCU executes the opening command. S10: When the state of either G1 or G2 has not disappeared and the state of either K1 or K2 is received, it is determined that there is a failure in the closing command of either the first control loop or the second control loop. After receiving the states of K1 and K2, the DCU executes the opening command and feeds back the loop failure state. After the state of either K1 or K2 disappears, the DCU executes the closing command and feeds back the loop failure state. The failure state is the same as when neither G1 nor G2 is received. S11: When the states of G1 and G2 have not disappeared and the states of K1 and K2 are received, it is determined that there is a failure in the closing commands of the first control loop and the second control loop. After receiving the states of K1 and K2, the DCU executes the opening command and feeds back the loop failure state. After the states of G1 and G2 disappear, the DCU executes the closing command.

[0032] Preferably, the control system can shield the detection of K1, K2, G1, and G2 by the DCU. The shielding function cannot shield either two opening commands or two closing commands at the same time. The commands after shielding will no longer affect the various functions of the DCU.

[0033] In a preferred technical solution, if K1 and K2 are both normal during opening, when either K1 or K2 becomes abnormal after the DCU receives the closing command, the DCU may not execute the sliding door opening action. If G1 and G2 are both normal during closing, when either G1 or G2 becomes abnormal after the DCU receives the opening command, the DCU may not execute the sliding door closing action.

[0034] Among them, as shown in the processing strategy chart of the enable + opening control command received by the DCU Figure 4 As shown: In a preferred technical solution, the working process of the DCU when receiving the enable and opening control commands is as follows: A1: Initialization settings: The DCU periodically reads the enable command S1 and the opening command K1 in the first control loop; the enable command S2 and the opening command K2 in the second control loop. A2: When the S1 and S2 states are received but the K1 and K2 states are not received, it is determined that both control loops are normal, and the DCU normally executes the door closing command; A3: When the S1 and S2 states are received and the K1 and K2 states are also received, it is determined that both control loops are normal, and the DCU normally executes the door opening command; A4: When the K1 and K2 states are received but the S1 and S2 states are not received, it is determined that there is a fault in the door opening command of both control loops. The DCU maintains the previous command state and reports a fault in the door opening command of both control loops; A5: When the S1 state is received but the S2, K1, and K2 states are not received, it is determined that there is a fault in the enable command of the second control loop. The DCU executes the door closing command and reports a fault in the enable command of the second control loop; A6: When the S2 state is received but the S1, K1, and K2 states are not received, it is determined that there is a fault in the enable command of the first control loop. The DCU executes the door closing command and reports a fault in the enable command of the first control loop; A7: When either the K1 or K2 state is received but the S1 and S2 states are not received, it is determined that there is a fault in the door opening command of either the first control loop or the second control loop. The DCU maintains the previous command state and reports the loop fault state, and the fault state is the loop that received the loop state; A8: When either the S1 or S2 state is received and either the K1 or K2 state is also received, it is determined that there are faults in the enable command and the door opening command of both loops. The DCU executes the door opening command and reports the loop fault state, and the fault state is the loop that did not receive the loop state; A9: When either the S1 or S2 state is received and the K1 and K2 states are also received, it is determined that there are faults in the enable commands of the first control loop and the second control loop. The DCU executes the door opening command and reports the loop fault state, and the fault state is the loop that did not receive the loop state; A10: When either the K1 or K2 state is received and the S1 and S2 states are also received, it is determined that there is a fault in the door opening command of either the first control loop or the second control loop. The DCU executes the door opening command and reports the loop fault state, and the fault state is the loop that did not receive the loop state.

[0035] Embodiment 2: The technical content of this embodiment is generally similar to that of Embodiment 1, and the difference is that: as Figure 5As shown: A platform door redundant control system with isolated parallel connection and alarm adopts the single PEDC mode. When adopting this mode, the industrial control computer 1 is connected to the PEDC2, and the status information during the operation of the platform door system is uploaded to the industrial control computer 1 through the PEDC2. The PEDC2 branches out two control commands at the sliding door opening and closing command output end, and protection circuits are respectively set for the two control commands. After receiving the opening and closing control commands issued by the signal system SIG, the local control panel PSL, or the emergency control panel IBP, the PEDC sends the sliding door opening and closing control commands to the DCU through two control loops after internal circuit processing. The opening and closing control loop 3 adopts two independent loops for sending the sliding door opening and closing control commands issued by the PEDC2 to the DCU4. The DCU4 is provided with independent status detection circuits for the two loops, and the two detection circuits can respectively read the status of the two loops. After receiving the opening and closing command, the DCU controls the sliding door to perform the opening and closing action according to the specific command of the opening and closing command. When the DCU receives a normal command, it normally performs the sliding door opening and closing action; when it receives an abnormal command, it searches for a processing strategy matching the judgment result in the preset processing strategy table to perform the opening and closing action.

[0036] Embodiment 3: The technical content of this embodiment is generally similar to that of Embodiment 1, and the difference lies in that: As Figure 6 shown: A platform door redundant control system with isolated parallel connection and alarm, and this control system further includes a redundant control module 9, and the redundant control module 9 is used to assist the PEDC2 to provide redundant independent control functions. In this mode, the industrial control computer 1 is connected to the PEDC2, and the status information during the operation of the platform door system is uploaded to the industrial control computer 1 through the PEDC2. The control of the unilateral sliding door is carried out simultaneously by the PEDC2 and the redundant control module 9. After receiving the opening and closing control commands issued by the signal system SIG, the local control panel PSL, or the emergency control panel IBP, the PEDC2 and the redundant control module 9 send the sliding door opening and closing control commands to the DCU through two control loops after internal circuit processing. The opening and closing control loop 3 adopts two independent loops for sending the sliding door opening and closing control commands issued by the PEDC2 and the redundant control module 9 to the DCU4. The DCU4 is provided with independent status detection circuits for the two loops, and the two detection circuits can respectively read the status of the two loops. After receiving the opening and closing command, the DCU4 controls the sliding door to perform the opening and closing action according to the specific command of the opening and closing command. When the DCU4 receives a normal command, it normally performs the sliding door opening and closing action; when it receives an abnormal command, it searches for a processing strategy matching the judgment result in the preset processing strategy table to perform the opening and closing action.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A platform door redundant control system for isolated parallel connection alarm, characterized in that: The control system includes an industrial computer, PEDC, a door opening and closing control circuit and a DCU; the industrial computer is connected to two PEDCs respectively, and the status information of the platform door system during operation is uploaded to the industrial computer through the two PEDCs respectively. After receiving the PEDC status, the industrial computer compares the status information. When the two statuses are consistent, the system normally displays and records the status information; When the two states are inconsistent, the preset processing strategy table is searched for a processing strategy that matches the judgment result to display and record the state information; the control of the single-sided sliding door is performed simultaneously by two PEDCs. After receiving the door opening and closing control command issued by any of the signal system SIG, the local control panel PSL, and the emergency control panel IBP, the PEDC sends the sliding door door opening and closing control command to the DCU through two control loops after internal circuit processing; wherein, the door opening and closing control loop adopts two independent first control loops and second control loops, which are used to send the sliding door door opening and closing control command issued by the PEDC to the DCU; the DCU is provided with independent state detection circuits for the two loops, and the two detection circuits can read the states of the two loops respectively. After receiving the door opening and closing command, the DCU controls the sliding door to execute the door opening and closing action according to the specific command of the door opening and closing command. When the DCU receives a normal command, the sliding door door opening and closing action is executed normally; when an abnormal command is received, the preset processing strategy table is searched for a processing strategy that matches the judgment result to execute the door opening and closing action.

2. The redundant control system of platform screen doors with isolated parallel connection alarm according to claim 1, characterized in that: The PEDC is divided into a main PEDC and a secondary PEDC; when the industrial computer receives the PEDC status, the software displays and records the status information normally when the two PEDC statuses are consistent; when the statuses are inconsistent, the software log records both records at the same time and indicates the source of the records, and the software interface displays the corresponding display scheme according to the status type. When there is a fault state in the status, the software interface displays the corresponding status of the fault; when there is a state inconsistent with the default working state in the status, an inconsistent state is displayed; when there is no status feedback in the status, a state with feedback is displayed; when two states inconsistent with the default working state appear in the same position, the main PEDC status is displayed.

3. The redundant control system of platform screen doors with isolated parallel connection and alarm as claimed in claim 2, wherein: The DCU is provided with a normal signal for the state of the door opening and closing command. When the DCU receives a normal signal for the state of the door opening and closing command, it sends the signal for the state of the door opening and closing command to the subsequent sliding door DCU. When the subsequent sliding door receives an abnormal signal for the door opening and closing command and receives a signal for the state of the door opening and closing command sent by the previous sliding door DCU, it is determined that there is an abnormality in the door opening and closing command between the sliding door at this level and the previous sliding door, and the state information is fed back according to the processing strategy in the preset processing strategy table. When the subsequent sliding door receives an abnormal signal for the door opening and closing command but does not receive a signal for the state of the door opening and closing command sent by the previous sliding door DCU, it is determined that there is no abnormality in the door opening and closing command between the sliding door at this level and the previous sliding door, and the corresponding door opening and closing action is performed according to the processing strategy in the preset processing strategy table.

4. The redundant control system for platform screen doors with isolation and parallel connection alarms according to claim 2, characterized in that: When the DCU does not set the normal signal of the door opening and closing command, when the industrial control computer receives the abnormal door opening and closing command feedback from the sliding door DCU, it compares the state of the sliding door of this track with that of the previous sliding door. When the states are inconsistent, it displays the abnormal state of the door opening and closing of the sliding door of this track. When the states are consistent, it does not display the abnormal state of the door opening and closing of the sliding door of this track.

5. The redundant control system for platform screen doors with isolated parallel connection and alarm as claimed in claim 1, wherein: The control system further includes a redundant control module. In this mode, the industrial control computer is connected to the PEDC, and the status information during the operation of the platform door system is uploaded to the industrial control computer through the PEDC. The control of the unilateral sliding door is carried out simultaneously by the PEDC and the redundant control module.

6. A control method for a redundant control system of platform screen doors with isolated parallel alarms, which uses the control system described in any one of claims 1-5, and is characterized in that: It includes the following steps: S1: Initialization settings: The DCU periodically reads the door opening command K1 and the door closing command G1 in the first control loop; the door opening command K2 and the door closing command G2 in the second control loop. S2: When the states of K1 and K2 are received but the states of G1 and G2 are not received, it is determined that both control loops are normal, and the DCU normally executes the door opening command. S3: When the states of G1 and G2 are received but the states of K1 and K2 are not received, it is determined that both control loops are normal, and the DCU normally executes the door closing command. S4: When the state of K1 is received but the states of K2, G1, and G2 are not received, it is determined that the door opening command of the second control loop fails, and the DCU normally executes the door opening command and feedbacks the failure of the door opening command of the second control loop. S5: When the state of K2 is received but the states of K1, G1, and G2 are not received, it is determined that the door opening command of the first control loop fails, and the DCU normally executes the door opening command and feedbacks the failure of the door opening command of the first control loop. S6: When the state of G1 is received but the states of K1, K2, and G2 are not received, it is determined that the door closing command of the second control loop fails, and the DCU normally executes the door closing command and feedbacks the failure of the door closing command of the second control loop. S7: When the state of G2 is received but the states of K1, K2, and G1 are not received, it is determined that the door closing command of the first control loop fails, and the DCU normally executes the door opening command and feedbacks the failure of the door closing command of the first control loop. S8: When the state of K1 or K2 does not disappear and the state of any one of G1 and G2 is received, it is determined that the door opening commands of the first control loop and the second control loop fail. After receiving the state of any one of G1 and G2, the DCU executes the door closing command and feedbacks the loop failure state. After the state of any one of G1 and G2 disappears, the DCU executes the door opening command and feedbacks the loop failure state, and the failure state is the same as that when neither K1 nor K2 is received. S9: When the states of K1 and K2 do not disappear and the states of G1 and G2 are received, it is determined that the door opening commands of the first control loop and the second control loop fail. After receiving the states of G1 and G2, the DCU executes the door closing command and feedbacks the loop failure state. After the states of G1 and G2 disappear, the DCU executes the door opening command. S10: When the state of either G1 or G2 has not disappeared and the state of either K1 or K2 is received, it is determined that there is a failure in the closing command of either the first control loop or the second control loop. After receiving the states of K1 and K2, the DCU executes the opening command and feeds back the loop failure state. After the state of either K1 or K2 disappears, the DCU executes the closing command and feeds back the loop failure state, and the failure state is the same as when neither G1 nor G2 is received. S11: When the states of G1 and G2 have not disappeared and the states of K1 and K2 are received, it is determined that there is a failure in the closing commands of the first control loop and the second control loop. After receiving the states of K1 and K2, the DCU executes the opening command and feeds back the loop failure state. After the states of G1 and G2 disappear, the DCU executes the closing command.

7. The control method of a platform door redundancy control system for isolated parallel connection alarm according to claim 6, characterized in that: If K1, G1; K2, G2; appear simultaneously in any of the cases of K1, G2; K2, G1, the DCU automatically shields the simultaneously appearing opening and closing commands, executes the opening and closing commands that do not appear simultaneously, and feeds back the failure state.

8. The control method of a platform door redundancy control system for isolated parallel connection alarm according to claim 6, characterized in that: This control system can shield the DCU's detection of K1, K2, G1, and G2. The shielding function cannot shield either two opening commands or two closing commands at the same time, and the commands after shielding will no longer affect the various functions of the DCU.

9. The control method of a platform door redundant control system for isolated parallel connection alarm according to claim 6, characterized in that: If K1 and K2 are both normal during opening, and an abnormality of either K1 or K2 occurs after the DCU receives the closing command, the DCU may not execute the sliding door opening action; if G1 and G2 are both normal during closing, and an abnormality of either G1 or G2 occurs after the DCU receives the opening command, the DCU may not execute the sliding door closing action.

10. The control method of a platform door redundancy control system with isolated parallel connection and alarm as claimed in claim 6, characterized in that: The working process of the DCU when receiving the enable and opening control commands is as follows: A1: Initialization settings: The DCU periodically reads the enable command S1 and the opening command K1 in the first control loop; the enable command S2 and the opening command K2 in the second control loop; A2: When the states of S1 and S2 are received but the states of K1 and K2 are not received, it is determined that both control loops are normal, and the DCU normally executes the closing command; A3: When the states of S1 and S2 are received and the states of K1 and K2 are received at the same time, it is determined that both control loops are normal, and the DCU normally executes the opening command; A4: When the states of K1 and K2 are received but the states of S1 and S2 are not received, it is determined that there is a failure in the opening commands of both control loops, and the DCU maintains the previous command state and feeds back the failure of the opening commands of both control loops; A5: When the state of S1 is received but the states of S2, K1, and K2 are not received, it is determined that there is a failure in the enable command of the second control loop, and the DCU executes the closing command and feeds back the failure of the enable command of the second control loop; A6: When the state of S2 is received but the states of S1, K1, and K2 are not received, it is determined that there is a failure in the enable command of the first control loop, and the DCU executes the closing command and feeds back the failure of the enable command of the first control loop; A7: When the state of either K1 or K2 is received but the states of S1 and S2 are not received, it is determined that there is a failure in the opening command of either the first control loop or the second control loop. The DCU maintains the previous command state and feeds back the loop failure state, and the failure state is the loop that receives the loop state. A8: When the states of either K1 or K2 are received simultaneously with either S1 or S2, it is determined that there are faults in the enable command and the door opening command for the two circuits. The DCU executes the door opening command and feeds back the circuit fault status, and the fault status is the circuit that has not received the circuit status. A9: When the states of K1 and K2 are received simultaneously with either S1 or S2, it is determined that there are faults in the enable commands of the first control circuit and the second control circuit. The DCU executes the door opening command and feeds back the circuit fault status, and the fault status is the circuit that has not received the circuit status. A10: When the states of either S1 or S2 are received simultaneously with either K1 or K2, it is determined that there is a fault in the door opening command of either the first control circuit or the second control circuit. The DCU executes the door opening command and feeds back the circuit fault status, and the fault status is the circuit that has not received the circuit status.

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