Split type rail transit platform door gap detection system and method

Abstract

The invention relates to the technical field of rail traffic detection, in particular to a split type rail traffic platform door gap detection system and method, and the system comprises a platform door main safety loop, a control host, a gap detection module and a local control box. The platform door main safety circuit is formed by connecting a sliding door safety circuit and a gap detection safety circuit in series. The platform door system sends a gap detection starting command to each gap detection control module after detecting that the sliding door safety loop is closed; the control host is responsible for detecting the operation state of the gap detection control module and sending a bypass command; when the local control box bypass switch bypasses, the gap detection safety circuit contact is directly bypassed, meanwhile, a bypass command is sent to the gap detection control module, and the gap detection control module controls the gap detection safety circuit contact to be closed to achieve double bypasses. The device is reasonable in structural design, easy to operate, clear in indication and higher in practicability, and the running safety and stability of the rail train are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of subway engineering detection, and particularly relates to a split-type gap detection system and method for rail transit platform doors. Background Art

[0002] During the operation of rail transit, a platform door system is generally installed on the platform to separate the platform from the track running area and enable passengers to get on and off the train. Considering the train clearance during train operation, the installation of the platform door system often needs to meet a certain distance from the stopped train, resulting in a certain width of gap between the platform door system and the stopped train, which poses certain safety hazards during the operation of the platform door system and needs to be corrected.

[0003] In actual rail operation management, to improve the safety of rail transit operation, in addition to installing safety baffles on the edges of the sliding doors of the platform doors, a more common method is to add gap detection devices to automatically determine whether there are foreign objects between the platform door system and the stopped train. Existing gap detection systems mostly adopt a centralized control method, that is, one side of the gap detection device completes the entire control process through a set of host computers controlled by a program. Each gap detection device is connected to the control host through terminals. Once the control host has a problem, it will cause problems with the gap detection on the entire side. At this time, it is necessary to manually confirm the safety of the gap between the platform door and the train one by one before the interlock can be released to allow the train to leave the station. The entire confirmation process takes a long time and may cause the train to be late, seriously affecting the safety and stability of rail train operation. Therefore, we need a split-type gap detection system and method for rail transit platform doors. Summary of the Invention

[0004] In order to solve the existing disadvantages and deficiencies in the use of the rail transit platform door system in the prior art, the present invention provides a split-type gap detection system and method for rail transit platform doors.

[0005] The present invention adopts the following technical solutions to achieve the above objectives: A split-type gap detection system for rail transit platform doors, comprising a total platform door safety circuit, a control host, a gap detection module, and a local control box; wherein the total platform door safety circuit is composed of a sliding door safety circuit and a gap detection safety circuit connected in series; the sliding door safety circuit is composed of the corresponding side sliding door and the emergency door travel switch connected in series; the gap detection safety circuit is composed of the control contacts of each gap detection control module connected in series. When the gap detection does not receive a start signal and the gap detection result is normal, the contacts of the gap detection safety circuit are closed; a branch is connected in parallel at both ends of the control contacts of the gap detection control module in the gap detection safety circuit and connected to the control host, and the control host completes the detection and bypass of the state of the gap detection safety circuit; to complete sending a gap detection start command to each gap detection control module after detecting that the sliding door safety circuit is closed. The control host includes a gap detection status display control module, a bypass switch, a status indicator light, and a host communication module; the gap detection status display control module judges whether the gap detection safety circuit is normal according to the status of the gap detection safety circuit, and lights up the gap detection fault alarm status indicator light when a safety circuit abnormality occurs; judges whether the gap detection bypass function is operated according to the status of the bypass switch, and lights up the gap detection bypass indicator light when the gap detection bypass function is operated; judges whether the gap detection control module executes the gap detection function according to the communication data of each gap detection control module, and lights up the gap detection operation abnormality indicator light when the gap detection control function is not executed; when it is detected that the input power supply of the gap detection safety circuit is abnormal, judges whether the gap detection results of each gap detection control module are normal according to the communication data of each gap detection control module, and lights up the gap detection fault alarm indicator light when a safety circuit abnormality occurs; when it is detected that an abnormality occurs in the detection circuit of the gap detection safety circuit or an abnormality occurs in the program operation, lights up the control host operation abnormality indicator light. Among them, the bypass switch is used to bypass the contacts of the gap detection safety circuit and send a bypass function to the gap detection control module and the gap detection status display control module of the control host. When the bypass switch of the control host is turned to the bypass position, the gap detection circuit contacts of the corresponding circuit can be directly bypassed; the status indicator light is used to display the system operation status, and emergency disposal personnel judge the system operation status according to the status indicator light; the host communication module is respectively connected to the gap detection control module and the platform door system, and is used to read the operation status of the gap detection control module and feedback the status of the control host to the platform door system. The gap detection module consists of a power supply module, a control command detection module, a gap detection control module, a door status indicator module, a safety loop break detection module, a bypass switch status detection module, an indicator control module, and a detection communication module. Among them, the power supply module is used to convert external power supply into various voltages required for the operation of the gap detection control module. The control command detection module is used to receive the gap detection start command sent by the platform door system. After receiving the start command, it controls the gap detection unit to perform detection and starts cumulative timing. Detection ends after reaching the predetermined time. When the gap detection start command reappears after being cancelled, the next detection begins. The gap detection control module is used to control the gap detection unit. The door status indicator is connected to the door status indicator of the sliding door within the control range of the gap detection control module. When a gap detection abnormality occurs, the door status indicator of the sliding door is lit. When the bypass state of the bypass switch is detected, the control of all door status indicators within the control range of the control module is cancelled and the bypass indicator is lit simultaneously. The safety loop break detection module is used to detect the status of the safety loop of the gap detection control module. When the safety loop contact of the gap detection control module is closed but the contact fails to close, a gap detection safety loop fault will occur at the site. When the safety loop break detection module detects this state, it issues a fault alarm to remind the emergency response personnel to bypass the gap detection control module in a timely manner. The bypass switch status detection module is used to receive the gap detection bypass command sent by the control host and the local control box. When the bypass state of the bypass switch is detected, it bypasses the safety loop contact of the corresponding loop for gap detection, cancels the control of all door status indicators within the control range of the control module, and lights the bypass indicator simultaneously. The indicator control module is used to display the operating status of the gap detection control module. When the bypass switch status detection module detects the bypass state of the bypass switch, it lights the bypass indicator. When the module is operating normally, it lights the module operating status indicator. When the gap detection result is abnormal, it lights the gap detection alarm indicator. The detection communication module is used to feedback the operating status of the gap detection control module to the control host and the industrial control computer of the platform door system. The local control box consists of a local bypass switch and a local status indicator. Operating the local bypass switch directly bypasses the safety loop contact for gap detection, and at the same time sends a bypass command to the gap detection control module. The gap detection control module controls the safety loop contact for gap detection to close to achieve double bypass. The local status indicator is used to display the operating status of the gap detection control module. The gap detection module controls the gap detection unit to perform gap detection according to the control command received from the platform screen door system, and feeds back the gap detection result to the platform screen door system and the control host; wherein, the gap detection unit is used to detect the gap between the platform screen door and the train in the control section and feed back the detection result to the gap detection control module; when the local control box bypass switch is bypassed, it directly bypasses the gap detection safety loop contact, and at the same time sends a bypass command to the gap detection control module, and the gap detection control module controls the gap detection safety loop contact to close to achieve double bypass.

[0006] As a preferred technical solution: when the gap detection control module loses power and the program runs abnormally, it will disconnect the gap detection contact corresponding to the gap detection control module and light up the gap detection alarm indicator, and the gap detection safety loop contact needs to be bypassed through the bypass switch.

[0007] A further preferred technical solution: after the control host receives the closed and locked state of the sliding door, it detects whether the gap detection control module starts to perform gap detection, and lights up the gap detection operation abnormal indicator of the corresponding loop for the module that has not been executed.

[0008] A further preferred technical solution: the bypass function of the control host can control the gap detection control module through communication, and the gap detection control module performs gap detection bypass; the detection of the gap detection safety loop state can receive the safety loop state data of the gap detection control module through communication and light up the gap detection operation abnormal indicator of the corresponding loop.

[0009] A further preferred technical solution: wherein, after the gap detection safety loop is bypassed, when the gap detection control module receives the gap detection start command sent by the platform screen door system, it still normally performs gap detection and starts to accumulate time. After reaching the predetermined time, the detection ends regardless of the gap detection result. When the gap detection start command reappears after being cancelled, the next detection starts; when the gap detection control module detects gap detection abnormality, it does not change the state of the door status indicator.

[0010] A further preferred technical solution: when the gap detection control module detects gap detection abnormality, it disconnects the gap detection safety loop and feeds back the state to the control host and the platform screen door system. After the abnormality disappears, it maintains the previous state, and cancels the maintained state after receiving the bypass command; at the same time, the gap detection control module can control the sliding doors in the control section to form a small gap detection start command, and the gap detection control module performs gap detection according to the state of the sliding doors in the control section of the control module.

[0011] Further preferred technical solution: In the case where there are multiple groups of gap detection control modules in the sliding doors corresponding to one carriage, the feedback status of the gap detection safety circuit in the control host is the output status of the safety circuit at the farthest end among the sliding doors corresponding to the carriage. The bypass function is simultaneously connected to the gap detection control modules corresponding to the entire carriage. When the control host is bypassed, the safety circuits of the gap detection control modules corresponding to the entire carriage are directly bypassed.

[0012] Further preferred technical solution: An operating contact of the gap detection control module can be set inside the control host. This contact is connected in series with the gap detection safety circuit. When the control host detects that a gap detection control module fails to perform the gap detection function, this contact is disconnected, and the contact is closed by operating the bypass switch of the corresponding circuit.

[0013] Further preferred technical solution: The gap detection module is provided with a gap detection status indicator light that is the same as the AND gate status indicator light. When abnormal detection, safety circuit failure, or the gap detection is in the bypass state occurs in the gap detection, the gap detection indicator light alarms.

[0014] A detection method for a split-type rail transit platform door gap detection system, using the above detection system, includes the following steps: A1: Initialization setting: Periodically read the status of the power supply end of the gap detection safety circuit as S0; the feedback status S1 of the safety circuit of the gap detection control module M1, the feedback status S2 of the safety circuit of the gap detection control module M2, until the feedback status Sn of the safety circuit of the gap detection control module Mn; A2: When S0 has no voltage, sequentially read the voltage statuses of S1 to Sn. When a safety circuit voltage appears, it is determined that S0 is normal. When an abnormality occurs in the S0 detection circuit, the control host operation abnormality indicator light is lit; when no safety circuit voltage appears, it is determined that the input power supply of the gap detection safety circuit is abnormal. The control host judges whether the gap detection results of each gap detection control module are normal according to the communication data of each gap detection control module. A3: When S1 has no voltage, sequentially read the voltage statuses of S2 to Sn. When a safety circuit voltage appears, it is determined that S1 is normal. When an abnormality occurs in the S1 detection circuit, the control host operation abnormality indicator light is lit; when no safety circuit voltage appears, it is determined that S1 is abnormal, and the gap detection fault alarm indicator light corresponding to S1 of the control host is lit; the control host judges whether the gap detection results of each gap detection control module are normal according to the communication data of each gap detection control module from S2 to Sn. A4: According to the operation steps of A3, sequentially detect the voltage statuses of S2 to Sn - 1; A5: When Sn has no voltage, it is determined that Sn is abnormal, and the gap detection fault alarm indicator light corresponding to Sn of the control host is lit.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: In the present invention, the control part is decentralized from the original control host to each gap detection control module. When the control host is abnormal, it does not affect the normal operation of the module. When a module is abnormal, the control host can be used to detect the operating state of the module and perform the bypass function, which can effectively improve the reliability of the system. The gap detection control module is provided with a local control box. When a gap detection failure occurs, after the emergency disposal personnel confirm the safety between the platform door and the train, they can bypass the faulty gap detection control module nearby, and the operation is more intuitive. The gap detection control module can directly control the door status indicator light, and the emergency disposal personnel can directly lock the fault point, and the fault display is more intuitive and has stronger practicability, greatly improving the safety and stability of the operation of the rail train. Brief Description of the Drawings

[0016] 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 drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic flow chart of the overall structure connection principle of the present invention; Figure 2 It is a system structure diagram of the control host of the present invention; Figure 3 It is a schematic diagram of the structure of the gap detection module of the present invention; Figure 4 It is a schematic diagram of the safety circuit detection and bypass principle of the control host of the present invention; Figure 5 It is a system structure diagram of the system without a control host of the present invention.

[0018] In the figure: 1. Total safety circuit of the platform door; 11. Safety circuit of the sliding door; 111. Sliding door; 112. Emergency door travel switch; 12. Gap detection safety circuit; 2. Control host; 21. Gap detection status display control module; 22. Bypass switch; 23. Status indicator light; 24. Host communication module; 3. Gap detection module; 31. Power supply module; 32. Control command detection module; 33. Gap detection control module; 34. Door status indicator light module; 35. Safety circuit break point detection module; 36. Bypass switch status detection module; 37. Indicator light control module; 38. Detection communication module; 39. Gap detection status indicator light; 4. Local control box; 41. Local bypass switch; 42. Local status indicator light. Detailed Embodiments

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] 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 are 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 limitation, an element defined by a statement such as "including one" does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0021] 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 components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Embodiment 1: As Figures 1 to 4 shown: A split-type gap detection system for rail transit platform doors, comprising a total platform door safety loop 1, a control host 2, a gap detection module 3, and a local control box 4. The total platform door safety loop 1 is composed of a sliding door safety loop 11 and a gap detection safety loop 12 connected in series. The sliding door safety loop 11 is composed of the corresponding side sliding door 111 and the emergency door travel switch 112 connected in series. The gap detection safety loop 12 is composed of the control contacts of each gap detection control module 33 connected in series. When the gap detection does not receive the start signal and the gap detection result is normal, the contacts of the gap detection safety loop 12 are closed. A branch is connected in parallel at both ends of the control contacts of the gap detection control module 33 of the gap detection safety loop 12 and accesses the control host 2, and the control host 2 is used to detect and bypass the state of the gap detection safety loop 12; after detecting that the sliding door safety loop 11 is closed, a gap detection start command is sent to each gap detection control module 33.

[0023] As Figure 2 shown: In this embodiment, the control host 2 includes a gap detection status display control module 21, a bypass switch 22, a status indicator light 23, and a host communication module 24. The gap detection status display control module 21 determines whether the gap detection safety loop 12 is normal according to the status of the gap detection safety loop 12, and lights up the gap detection fault alarm status indicator light 23 when a safety loop abnormality occurs. Specifically, it includes: judging whether the gap detection bypass function is operated according to the bypass switch state, and lighting up the gap detection bypass indicator light 23 when the gap detection bypass function is operated; judging whether the gap detection control module 33 executes the gap detection function according to the communication data of each gap detection control module 33, and lighting up the gap detection operation abnormality indicator light when the gap detection control function is not executed; when it is detected that the input power supply of the gap detection safety loop 12 is abnormal, judging whether the gap detection results of each gap detection control module 33 are normal according to the communication data of each gap detection control module 33, and lighting up the gap detection fault alarm indicator light when a safety loop abnormality occurs; when it is detected that an abnormality occurs in the detection circuit or program operation of the gap detection safety loop 12, lighting up the operation abnormality indicator light of the control host 2.

[0024] Among them, the bypass switch 22 is used to bypass the contacts of the gap detection safety loop 12 and send the bypass function to the gap detection control module 33 and the gap detection status display control module 21 of the control host 2. When the bypass switch of the control host 2 is turned to the bypass position, the gap detection loop contacts of the corresponding loop can be directly bypassed. The status indicator light 23 is used to display the system operation status, and emergency response personnel judge the system operation status according to the status indicator light; the host communication module 24 is respectively connected to the gap detection control module 33 and the platform door system, and is used to read the operation status of the gap detection control module 33 and feedback the status of the control host 2 to the platform door system; AsFigure 4 As shown: In this embodiment, after the control host 2 receives the closed and locked state of the sliding door, it detects whether the gap detection control module 33 starts to perform gap detection, and lights the gap detection operation abnormal indicator of the corresponding circuit for the module that has not executed. The bypass function of the control host 2 can control the gap detection control module 33 through communication, and the gap detection control module 33 performs gap detection bypass. The detection of the state of the gap detection safety circuit 12 can receive the safety circuit state data of the gap detection control module 33 through communication to light the gap detection operation abnormal indicator of the corresponding circuit. An operation contact of the gap detection control module 33 can be set inside the control host 2, and this contact is connected in series with the gap detection safety circuit 12. When the control host 2 detects that a gap detection control module 33 does not execute the gap detection function, this contact is disconnected, and this contact is closed by operating the bypass switch of the corresponding circuit.

[0025] In this embodiment, the gap detection module 3 is composed of a power supply module 31, a control command detection module 32, a gap detection control module 33, a door state indicator module 34, a safety circuit break point detection module 35, a bypass switch state detection module 36, an indicator control module 37, and a detection communication module 38. Among them, the power supply module 31 is used to convert the external power supply into various voltages required for the operation of the gap detection control module 33. The control command detection module 32 is used to receive the gap detection start command sent by the platform door system. After receiving the start command, it controls the gap detection unit to perform detection and starts to accumulate time. After reaching the predetermined time, the detection ends. When the gap detection start command reappears after being cancelled, the next detection starts. The gap detection control module 33 is used to realize the control of the gap detection unit; the door state indicator is connected to the door state indicator of the sliding door within the control range of the gap detection control module 33. When a gap detection abnormality occurs, the door state indicator of the sliding door is lit. When the bypass state of the bypass switch is detected, the control of all door state indicators within the control range of the control module is cancelled and the bypass indicator is lit simultaneously.

[0026] In this embodiment, the safety loop breakpoint detection module 35 is used to detect the safety loop status of the gap detection control module 33. When the contact of the safety loop fails to close after the gap detection control module 33 controls the safety loop contact to close, a fault of the gap detection safety loop 12 will occur on site. When the safety loop breakpoint detection module 35 detects this status, it will give a fault alarm to remind the emergency response personnel to bypass the gap detection control module 33 in time. The bypass switch status detection module 36 is used to receive the gap detection bypass commands sent by the control host 2 and the local control box 4. When it detects the bypass status of the bypass switch, it bypasses the contacts of the gap detection safety loop 12 in the corresponding loop, cancels the control of all door status indicators within the control range of the control module, and simultaneously lights up the bypass indicator light. The indicator light control module 37 is used to display the operating status of the gap detection control module 33. When the bypass switch status detection module 36 detects the bypass status of the bypass switch, it lights up the bypass indicator light; when the module is operating normally, it lights up the module operating status indicator light; when the gap detection result is abnormal, it lights up the gap detection alarm indicator light; the detection communication module 38 is used to feedback the operating status of the gap detection control module 33 to the control host 2 and the industrial control computer of the platform screen door system; As Figure 3 shown: In this embodiment, the gap detection module 3 controls the gap detection unit to perform gap detection according to the control command received from the platform screen door system, and feeds back the gap detection result to the platform screen door system and the control host 2. Among them, the gap detection unit is used to detect the gap between the platform screen door and the train within the control range and feed back the detection result to the gap detection control module 33. When the bypass switch of the local control box 4 is bypassed, it directly bypasses the contacts of the gap detection safety loop 12, and at the same time sends a bypass command to the gap detection control module 33, and the gap detection control module 33 controls the contacts of the gap detection safety loop 12 to close to achieve double bypass. When the gap detection control module 33 loses power and the program runs abnormally, it will disconnect the corresponding gap detection contacts of the gap detection control module 33 and light up the gap detection alarm indicator light. It is necessary to bypass the contacts of the gap detection safety loop 12 through the bypass switch. In a preferred technical solution, the gap detection module 3 is provided with a gap detection status indicator light 39 that is the same as the AND gate status indicator light. When the gap detection shows detection abnormality, safety loop fault, and the gap detection is in the bypass state, the gap detection indicator light gives an alarm.

[0027] In this embodiment, the local control box 4 is composed of a local bypass switch 41 and a local status indicator light 42. Operating the local bypass switch 41 directly bypasses the contacts of the gap detection safety loop 12, and at the same time sends a bypass command to the gap detection control module 33. The gap detection control module 33 controls the contacts of the gap detection safety loop 12 to close to achieve double bypass; the local status indicator light 42 is used to display the operating status of the gap detection control module 33.

[0028] Among them, after the gap detection safety circuit 12 is bypassed, when the gap detection control module 33 receives the gap detection start command sent by the platform door system, it still normally performs gap detection and starts cumulative timing. After reaching the predetermined time, the detection ends regardless of the gap detection result. When the gap detection start command reappears after being cancelled, the next detection starts; when the gap detection control module 33 detects an abnormal gap detection, the status of the door status indicator light is not changed.

[0029] In this embodiment, when the gap detection control module 33 detects an abnormal gap detection, it disconnects the gap detection safety circuit 12 and feeds back the status to the control host 2 and the platform door system. After the abnormality disappears, it maintains the previous state, and cancels the maintained state after receiving the bypass command; at the same time, the gap detection start command of the sliding doors in the section can be controlled by the gap detection control module 33, and the gap detection control module 33 performs gap detection according to the status of the sliding doors in the control section of the control module.

[0030] In this embodiment, for the case where there are multiple groups of gap detection control modules 33 in the sliding doors corresponding to one carriage, the feedback status of the gap detection safety circuit 12 in the control host 2 is the output status of the farthest safety circuit among the sliding doors corresponding to the carriage. The bypass function is simultaneously connected to the gap detection control modules 33 corresponding to the entire carriage. When the control host 2 is bypassed, the safety circuits of the gap detection control modules 33 corresponding to the entire carriage are directly bypassed.

[0031] A detection method for a split-type rail transit platform door gap detection system, using the above detection system, includes the following steps: A1: Initialization settings: Periodically read the power supply end status of the gap detection safety circuit 12 as S0; the safety circuit feedback status S1 of the gap detection control module 33M1, the safety circuit feedback status S2 of the gap detection control module 33M2, until the safety circuit feedback status Sn of the gap detection control module 33Mn; A2: When it is detected that there is no voltage at S0, sequentially read the voltage statuses of S1 to Sn. When a safety circuit voltage appears, it is determined that S0 is normal. When an abnormality occurs in the S0 detection circuit, the operation abnormality indicator light of the control host 2 is lit; when no safety circuit voltage appears, it is determined that there is an abnormality in the input power supply of the gap detection safety circuit 12, and the control host 2 judges whether the gap detection results of each gap detection control module 33 are normal according to the communication data of each gap detection control module 33; A3: When no voltage is detected at S1, sequentially read the voltage states of S2 to Sn. When a safety loop voltage appears, determine that S1 is normal. If an abnormality occurs in the S1 detection loop, light up the operation abnormality indicator of the control host 2. When no safety loop voltage appears, determine that S1 is abnormal and light up the gap detection fault alarm indicator corresponding to S1 on the control host 2. The control host 2 determines whether the gap detection results of each gap detection control module 33 are normal based on the communication data of each gap detection control module 33 from S2 to Sn. A4: According to the operation steps of A3, sequentially detect the voltage states of S2 to Sn-1. A5: When no voltage is detected at Sn, determine that Sn is abnormal and light up the gap detection fault alarm indicator corresponding to Sn on the control host 2.

[0032] Embodiment 2: The general technical solution of this embodiment is similar to that of Embodiment 1. The difference is as follows: As Figure 5 shown: A split-type gap detection system for rail transit platform doors can work in a mode without a control host. When using the mode without a control host, the system consists of a PSL panel, a gap detection control module, and a gap detection unit. Among them, the gap detection control module and the gap detection unit are exactly the same as those in Embodiment 1. The PSL panel newly adds a gap detection safety loop indicator. When a gap detection fault occurs, the gap detection safety loop indicator goes out, and the total safety loop of the platform door system is not connected. The normal entry and exit of the train are realized through the interlock release function of the PSL panel.

[0033] 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 principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A split-type gap detection system for rail transit platform doors, characterized in that: It includes the platform screen door general safety loop, the control host, the gap detection module and the local control box; among which, the platform screen door general safety loop is composed of the sliding door safety loop and the gap detection safety loop connected in series; the sliding door safety loop is composed of the corresponding side sliding door and the emergency door travel switch connected in series; the gap detection safety loop is composed of the control contacts of each gap detection control module connected in series. When the gap detection does not receive the start signal and the gap detection result is normal, the contacts of the gap detection safety loop are closed; a branch is connected in parallel at both ends of the control contacts of the gap detection control module in the gap detection safety loop and accesses the control host, and the control host is used to complete the detection and bypass of the status of the gap detection safety loop; so as to complete sending the gap detection start command to each gap detection control module after detecting that the sliding door safety loop is closed. The control host includes a gap detection status display control module, a bypass switch, a status indicator light and a host communication module; the gap detection status display control module judges whether the gap detection safety loop is normal according to the status of the gap detection safety loop, and lights up the gap detection fault alarm status indicator light when a safety loop abnormality occurs. Judge whether to operate the gap detection bypass function according to the status of the bypass switch, and light up the gap detection bypass indicator light when operating the gap detection bypass function; judge whether the gap detection control module executes the gap detection function according to the communication data of each gap detection control module, and light up the gap detection operation abnormality indicator light when the gap detection control function is not executed. When it is detected that the input power supply of the gap detection safety loop is abnormal, judge whether the gap detection results of each gap detection control module are normal according to the communication data of each gap detection control module, and light up the gap detection fault alarm indicator light when a safety loop abnormality occurs. When it is detected that the detection circuit of the gap detection safety loop is abnormal or the program runs abnormally, light up the control host operation abnormality indicator light. Among them, the bypass switch is used to bypass the contacts of the gap detection safety loop and send the bypass function to the gap detection control module and the gap detection status display control module of the control host. When the bypass switch of the control host is turned to the bypass position, the gap detection loop contacts of the corresponding loop can be directly bypassed; the status indicator light is used to display the system operation status, and the emergency disposal personnel judge the system operation status according to the status indicator light; the host communication module is respectively connected to the gap detection control module and the platform screen door system, and is used to read the operation status of the gap detection control module and feedback the status of the control host to the platform screen door system. The gap detection module consists of a power supply module, a control command detection module, a gap detection control module, a door status indicator light module, a safety loop break point detection module, a bypass switch status detection module, an indicator light control module, and a detection communication module. Among them, the power supply module is used to convert external power supply into various voltages required for the operation of the gap detection control module. The control command detection module is used to receive the gap detection start command sent by the platform door system. After receiving the start command, it controls the gap detection unit to perform detection and starts cumulative timing. Detection ends after reaching the predetermined time. When the gap detection start command reappears after being cancelled, the next detection starts. The gap detection control module is used to control the gap detection unit. The door status indicator light is connected to the door status indicator lights of the sliding doors within the control range of the gap detection control module. When a gap detection abnormality occurs, the door status indicator lights of the sliding doors are lit. When the bypass state of the bypass switch is detected, the control of all door status indicator lights within the control range of the control module is cancelled, and the bypass indicator light is lit simultaneously. The safety loop break point detection module is used to detect the status of the safety loop of the gap detection control module. When the safety loop contact of the gap detection control module fails to close after the contact is closed, a gap detection safety loop fault will occur on-site. When the safety loop break point detection module detects this state, it issues a fault alarm to remind emergency response personnel to bypass the gap detection control module in a timely manner. The bypass switch status detection module is used to receive the gap detection bypass command sent by the control host and the local control box. When the bypass state of the bypass switch is detected, the safety loop contact of the corresponding loop for gap detection is bypassed, the control of all door status indicator lights within the control range of the control module is cancelled, and the bypass indicator light is lit simultaneously. The indicator light control module is used to display the operating status of the gap detection control module. When the bypass switch status detection module detects the bypass state of the bypass switch, the bypass indicator light is lit. When the module is operating normally, the module operating status indicator light is lit. When the gap detection result is abnormal, the gap detection alarm indicator light is lit. The detection communication module is used to feedback the operating status of the gap detection control module to the control host and the industrial control computer of the platform door system. The local control box consists of a local bypass switch and a local status indicator light. Operating the local bypass switch directly bypasses the safety loop contact for gap detection and sends a bypass command to the gap detection control module at the same time. The gap detection control module controls the safety loop contact for gap detection to close to achieve double bypass. The local status indicator light is used to display the operating status of the gap detection control module.

2. The split-type gap detection system for rail transit platform doors according to claim 1, wherein: When the gap detection control module loses power and the program runs abnormally, the gap detection contact corresponding to the gap detection control module is disconnected, and the gap detection alarm indicator light is lit. It is necessary to bypass the safety loop contact for gap detection through the bypass switch.

3. The split-type rail transit platform door gap detection system according to claim 2, characterized in that: After receiving the closed and locked state of the sliding door, the control host detects whether the gap detection control module starts to perform gap detection, and lights the gap detection operation abnormality indicator light of the corresponding loop for the module that has not executed.

4. The split-type gap detection system for rail transit platform screen doors according to claim 3, characterized in that: The bypass function of the control host can control the gap detection control module through communication, and the gap detection bypass is carried out by the gap detection control module; the detection of the gap detection safety loop status can receive the safety loop status data of the gap detection control module through communication to light up the gap detection operation abnormal indicator of the corresponding loop.

5. The split-type gap detection system for rail transit platform screen doors according to claim 4, wherein: Among them, After the gap detection safety loop is bypassed, when the gap detection control module receives the gap detection start command sent by the platform door system, it still normally performs gap detection and starts cumulative timing. After reaching the predetermined time, the detection ends regardless of the gap detection result. When the gap detection start command is cancelled and appears again, the next detection starts; When the gap detection control module detects an abnormal gap detection, it does not change the status of the door status indicator.

6. The split-type rail transit platform door gap detection system according to claim 5, wherein: When the gap detection control module detects an abnormal gap detection, it disconnects the gap detection safety loop and feeds back the status to the control host and the platform door system. After the abnormality disappears, it maintains the previous state and cancels the maintained state after receiving the bypass command; at the same time, the gap detection control module can control the sliding doors in the section to form a small gap detection start command, and the gap detection control module performs gap detection according to the status of the sliding doors in the control module control section.

7. The split-type gap detection system for rail transit platform screen doors according to claim 6, wherein: For the situation where there are multiple groups of gap detection control modules in the sliding doors corresponding to one carriage, the feedback status of the gap detection safety loop in the control host is the output status of the most distal safety loop in the sliding doors corresponding to the carriage. The bypass function is simultaneously connected to the gap detection control modules corresponding to the entire carriage. When the control host bypasses, it directly bypasses the safety loop of the gap detection control modules corresponding to the entire carriage.

8. The split-type gap detection system for rail transit platform screen doors according to claim 7, wherein: An operating contact of the gap detection control module can be set inside the control host. This contact is connected in series with the gap detection safety loop. When the control host detects that a gap detection control module fails to perform the gap detection function, this contact is disconnected, and this contact is closed by operating the bypass switch of the corresponding loop.

9. The split-type gap detection system for rail transit platform screen doors according to claim 8, wherein: The gap detection module is provided with a gap detection status indicator identical to the door status indicator. When there are detection abnormalities, safety loop failures, and the gap detection is in the bypass state in the gap detection, the gap detection indicator alarms.

10. A detection method for a split-type gap detection system of a rail transit platform door, using the detection system described in any one of claims 1-9, characterized in that: It includes the following steps: A1: Initialization settings: Periodically read the status of the power supply end of the gap detection safety loop as S0; the safety loop feedback status S1 of the gap detection control module M1, the safety loop feedback status S2 of the gap detection control module M2, until the safety loop feedback status Sn of the gap detection control module Mn; A2: When no voltage is detected at S0, sequentially read the voltage statuses of S1 to Sn. When the safety loop voltage appears, it is determined that S0 is normal. When an abnormality occurs in the S0 detection loop, the control host operation abnormal indicator is lit; when the safety loop voltage does not appear, it is determined that the input power supply of the gap detection safety loop is abnormal. The control host judges whether the gap detection results of each gap detection control module are normal according to the communication data of each gap detection control module; A3: When no voltage is detected at S1, sequentially read the voltage states of S2 to Sn. When a safety loop voltage appears, determine that S1 is normal. If an abnormality occurs in the S1 detection loop, turn on the abnormal operation indicator light of the control host. When no safety loop voltage appears, determine that S1 is abnormal and turn on the gap detection fault alarm indicator light corresponding to S1 on the control host. The control host determines whether the gap detection results of each gap detection control module are normal based on the communication data of each gap detection control module from S2 to Sn. A4: According to the operation steps of A3, sequentially detect the voltage states of S2 to Sn-1. A5: When no voltage is detected at Sn, determine that Sn is abnormal and turn on the gap detection fault alarm indicator light corresponding to Sn on the control host.

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