Platform door system gap detection device control method

Abstract

The invention provides a platform door system gap detection device control method, which specifically comprises the steps that a signal system sends a door closing command to a platform door system and then keeps a command output state, the platform door system controls a sliding door to be closed after receiving the signal door closing command, and the state is fed back to a gap detection device after the sliding door is closed and locked; the gap detection device starts gap detection when receiving that the sliding door is in a closed and locked state, and feeds back the closed and locked state of the platform door system to the signal system when the gap detection is not abnormal; after the vehicle door is normally closed and locked, the vehicle door is fully closed, and the locking state is fed back to the signal system; the signal judges that the train door and the platform door are closed and the door closing command is canceled when being locked, the gap detection device cancels detection after detecting that the signal door closing command disappears, and the signal system controls the train to leave the station after confirming that no obstacle is retained in the gap detection device. According to the method, gap detection is matched with train operation, and the safety of train operation is improved.

Description

Technical Field

[0001] The present invention relates to the field of rail transit platform safety protection equipment, and in particular to a platform door system gap detection device control method and system. Background Art

[0002] In the operation of rail transit, platform door systems are generally installed on the platform to separate the platform from the track area and enable passengers to get on and off the train. Considering the train clearance during the operation of the train, the platform door system is often required to have a certain distance from the train that stops at the station, so that there is a certain width of gap between the platform door system and the train that stops at the station, resulting in certain safety hazards in the operation of the platform door system.

[0003] In order to improve the safety of rail transit operations, in addition to installing safety baffles on the edges of the sliding doors of platform doors, a more common method is to add a gap detection device to automatically determine whether there are foreign objects between the platform door system and the stopped train. The gap detection device starts the gap detection after receiving the closed signal of the sliding door safety circuit of the platform door system. After starting the gap detection, it automatically cancels the gap detection state after a delay of a period of time. If the delay time is too long, the gap detection device will still be in the detection state when the train leaves the station. The vibration of the train leaving the station may easily cause the gap detection device to malfunction, and eventually cause the train to brake urgently; if the delay time is too short, when the train door closes for the second time, the gap detection device has already finished the detection, and the gap between the abnormal train door and the sliding door will be in an unsafe state, which poses certain safety hazards.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0005] The object of the present invention is to address the deficiencies of the prior art and thereby provide a control method and system for a gap detection device of a platform door system.

[0006] In order to achieve one of the above purposes, the technical solution adopted by the present invention is: A first aspect provides a control method for a platform door system gap detection device, the control method comprising the following steps: The signal system periodically reads the status information of the train and platform door system, and the platform door system periodically reads the status information of the signal system and platform door system; After receiving the door opening command sent by the train, the signal system sends a door opening command signal to the platform door system. After receiving the command, the platform door system controls the corresponding sliding door to open; After receiving the door closing command from the train, the signal system sends the platform door system door closing command and maintains it. After receiving the command, the platform door system controls the corresponding sliding door to close. After the sliding door is closed, it sends the sliding door fully closed and locked status information to the gap detection device; After receiving the information that the sliding door is fully closed and locked, the gap detection device starts the detection function to detect whether there is a foreign object in the gap between the platform door and the train: When there is a foreign object, the gap detection safety circuit is disconnected, the platform door system's total safety circuit is disconnected, and the train cannot leave the station; the signal system continues to maintain the platform door system's door closing command because it has not received the platform door system's closed and locked status. After the on-site personnel remove the foreign object or bypass the gap detection circuit, the gap detection safety circuit is closed, the platform door system's total safety circuit is closed, and the platform door system's closed and locked status is fed back to the signal system; When there is no foreign object, the gap detection safety circuit is closed, the platform door system total safety circuit is closed, the platform door system returns the closed and locked state to the signal system, and the gap detection device continues to detect; The signal system determines whether the door fully closed and locked state issued by the train and the platform door fully closed and locked state issued by the platform door system exist at the same time. If both exist, the door closing command sent to the platform door system is cancelled. After the gap detection device detects that the door closing command sent to the platform door system disappears, it ends the detection and sends the gap detection end information to the signal system. After the gap detection device ends the detection, the gap detection safety circuit remains closed. The signal system controls the train to leave the station normally.

[0007] Furthermore, before the train is controlled to leave the station after receiving the gap detection end message, if it is detected that the door is fully closed and the locking state information disappears, the door closing command signal is resent to the platform door system and maintained, so that the gap detection device can start the gap detection when it detects the door closing command signal but does not detect that the platform door is fully closed and the locking state is disconnected and then closed again; When it is detected that the vehicle door is fully closed and the locking state information disappears and then reappears, the door closing command signal is cancelled so that the gap detection device ends the detection after detecting that the door closing command signal disappears.

[0008] Furthermore, the gap detection device accumulates time after starting detection; within the accumulated time, if the door closing command is canceled normally, the gap detection device will normally end the detection after a certain delay according to the door closing command status; if the duration of the door closing command exceeds the upper limit of the accumulated time, the gap detection device will normally end the detection according to the accumulated time.

[0009] Furthermore, when the gap detection device does not receive the information that the sliding door is closed and locked, but detects that the sliding door is in an interlock release state, the gap detection can be started; When it is monitored that the sliding door is in the interlock release state and the gap detection state is normal, the train is controlled to leave the station.

[0010] Furthermore, a start gap detection command may be sent to the gap detection device while sending a door closing command signal to the platform door system; and an end detection command may be sent to the gap detection device while canceling the door closing command signal.

[0011] A second object of the present invention is to provide a platform door system gap detection device control system, comprising a signal system, a platform door system, a train system and a gap detection device; The signal system is used to periodically read the status information of the train and the platform door system, send a door opening command signal to the platform door system after receiving the door opening command sent by the train; send and maintain the platform door system door closing command after receiving the door closing command sent by the train; and cancel the door closing command after judging that the door fully closed and locked state sent by the train and the platform door fully closed and locked state sent by the platform door system exist at the same time, and control the train to leave the station after receiving the gap detection end information sent by the gap detection device; The platform door system is used to periodically read the status information of the signal system and the platform door system, and control the corresponding sliding door to open after receiving the door opening command sent by the signal system; control the corresponding sliding door to close after receiving the door closing command sent by the signal system, and send the sliding door fully closed and locked status information to the gap detection device after the sliding door is closed; and when there is no foreign matter in the gap detection device, return the closed and locked status of the platform door system to the signal system; The gap detection device is used to start the detection function of the gap detection device to detect whether there is foreign matter in the gap between the platform door and the train after receiving the information that the sliding door is fully closed and locked: when there is foreign matter, the gap detection safety circuit is disconnected, and the gap detection safety circuit is closed after the on-site personnel remove the foreign matter or bypass the gap detection circuit; when there is no foreign matter, the gap detection safety circuit is closed and detection is continued; and after detecting that the door closing command disappears, the detection function of the gap detection is canceled, and the closed and locked status of the platform door system is fed back to the signal system.

[0012] Furthermore, the gap detection device accumulates time after starting detection; within the accumulated time, if the door closing command is canceled normally, the gap detection device will normally end the detection after a certain delay according to the door closing command status; if the duration of the door closing command exceeds the upper limit of the accumulated time, the gap detection device will normally end the detection according to the accumulated time.

[0013] Furthermore, the signal system may also send a start gap detection command to the gap detection device while sending a door closing command signal to the platform door system; During the closing process of the sliding door, if the gap detection device does not detect any foreign matter, the sliding door closes normally; During the closing process of the sliding door, if the gap detection device detects a foreign object, the abnormal state of the gap detection will be fed back to the sliding door DCU, and the sliding door DCU will start the sliding door anti-pinch function until it receives feedback from the gap detection device that there is no abnormal state of the gap detection, and then starts the sliding door closing action again; The signal system sends a detection end command to the gap detection device while canceling the door closing command signal.

[0014] Furthermore, the signal system controls the train to leave the station after receiving the gap detection end message. If it is detected that the doors are fully closed and the locking state information disappears, the signal system re-sends the door closing command signal to the platform door system and maintains it, so that the gap detection device can start the gap detection when it detects the door closing command signal but does not detect that the platform door is fully closed and the locking state is disconnected and then closed again; When it is detected that the vehicle door is fully closed and the locking state information disappears and then reappears, the door closing command signal is cancelled so that the gap detection device ends the detection after detecting that the door closing command signal disappears.

[0015] Furthermore, the gap detection device is also provided with a gap detection start switch and a gap detection start indicator light; the gap detection start indicator light is used to indicate whether the gap detection is started; When the sliding door cannot be closed normally, the gap detection is started by the gap detection start switch, and the gap detection start indicator light is used to confirm the start of the gap detection, and the interlocking of the sliding door is released only when it is detected that there is no foreign object between the sliding door and the train; When the signal system detects that the sliding door is in the interlock release state, the gap detection state is normal, and the doors are fully closed and locked, the train will be controlled to leave the station.

[0016] Compared with the prior art, the present invention has outstanding substantive features and significant progress. Specifically, in the present invention, the signal system sends a door closing command to the platform door system and maintains the command output state. After receiving the signal door closing command, the platform door system controls the sliding door to close. After the sliding door is closed and locked, the state is fed back to the gap detection device. When the gap detection device receives the sliding door closed and locked state, it starts gap detection. When there is no abnormality in the gap detection, the platform door system is closed and locked. The state is fed back to the signal system; after the car door is closed and locked normally, the car door is fully closed and the locked state is fed back to the signal system; when the signal judges that the train door and the platform door are closed and locked, the door closing command is cancelled. The gap detection device detects that the signal door closing command disappears and cancels the detection. The signal system controls the train to leave the station after confirming that there are no obstacles trapped therein. In the whole process, the gap detection stage is the time period from the closing of the platform door system to the closing of the car door, so that the gap detection device will not be in the detection state when the train leaves the station.

[0017] In addition, after detecting that the train door is fully closed and the locking status information disappears, the present invention re-sends the door closing command signal to the platform door system and maintains it, so that the gap detection device can start gap detection when it detects the door closing command signal but fails to detect that the platform door is fully closed and the locking status is disconnected and then closed again; thereby solving the safety problem that may occur when the train door is abnormally opened and the gap detection device cannot detect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of the platform gap detection and train exit linkage control method of the present invention.

[0019] Figure 2 It is a schematic diagram of the interactive process between platform gap detection and train exit linkage control.

[0020] Figure 3 It is a timing diagram of the platform gap detection and train exit linkage control of the present invention.

[0021] Figure 4 It is a structural block diagram of the system described in Example 4 of the present invention. DETAILED DESCRIPTION

[0022] In view of the problem of mismatch between gap detection time and train operation in the prior art, the present invention reads the train status information through the signal system, sends the platform door system door opening control command to the platform door system after receiving the door opening command, sends the platform door system door closing control command to the platform door system after receiving the door closing command and maintains it, cancels the system door closing control command after receiving the train door full closing and locking command issued by the train and the platform door full closing and locking command issued by the platform door system; the platform door system gap detection device starts gap detection and maintains the detection state after receiving the sliding door full closing and locking state, and ends the gap detection state after receiving the signal door closing command disappears. This method determines the gap detection stage according to the time from the actual platform door system closing to the train meeting the conditions for leaving the station, so that the gap detection device will not be in the detection state when the train leaves the station, which can effectively improve the detection effect of the platform door system gap detection and improve the safety of the platform door system operation.

[0023] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0024] Example 1 This embodiment provides a control method for a platform door system gap detection device applied to a signal system, such as Figure 1-3 As shown, the specific steps include: The signal system periodically reads the status information of the train and platform door system, and the platform door system periodically reads the status information of the signal system and platform door system; After receiving the door opening command sent by the train, the signal system sends a door opening command signal to the platform door system. After receiving the command, the platform door system controls the corresponding sliding door to open; After receiving the door closing command from the train, the signal system sends the platform door system door closing command and maintains it. After receiving the command, the platform door system controls the corresponding sliding door to close. After the sliding door is closed, it sends the sliding door fully closed and locked status information to the gap detection device; After receiving the information that the sliding door is fully closed and locked, the gap detection device starts the detection function to detect whether there is a foreign object in the gap between the platform door and the train: When there is a foreign object, the gap detection safety circuit is disconnected, the platform door system's total safety circuit is disconnected, and the train cannot leave the station; the signal system continues to maintain the platform door system's door closing command because it has not received the platform door system's closed and locked status. After the on-site personnel remove the foreign object or bypass the gap detection circuit, the gap detection safety circuit is closed, the platform door system's total safety circuit is closed, and the platform door system's closed and locked status is fed back to the signal system; When there is no foreign object, the gap detection safety circuit is closed, the platform door system total safety circuit is closed, the platform door system returns the closed and locked state to the signal system, and the gap detection device continues to detect; The signal system determines whether the door fully closed and locked state issued by the train and the platform door fully closed and locked state issued by the platform door system exist at the same time. If both exist, the door closing command sent to the platform door system is cancelled. After the gap detection device detects that the door closing command sent to the platform door system disappears, it ends the detection and sends the gap detection end information to the signal system. After the gap detection device ends the detection, the gap detection safety circuit remains closed. After the total safety circuit of the platform door system is closed and the gap detection completion information is received, the signal system controls the train to leave the station normally.

[0025] It should be noted that the gap detector is installed on both sides or the top of each sliding door. The DCU of the sliding door detects that the controlled sliding door is closed and starts the gap detection device. When the gap detection device detects that there is no foreign object, the gap detection device safety circuit relay contact is closed, the safety circuit of this sliding door is closed, and the platform door system total safety circuit is closed; when the gap detection device detects a foreign object, the gap detection device safety circuit relay contact is disconnected, and the safety circuit of the entire side is blocked. Among them, each sliding door safety circuit is composed of the sliding door safety circuit, the gap detection device safety circuit and the platform door operation status circuit contacts connected in series.

[0026] In another embodiment, certain faults may cause the door closing command signal issued by the platform door system to be unable to be canceled, resulting in the problem that the gap detection is always in the detection state. To solve this problem, the gap detection device accumulates time after starting the detection; within the accumulated time, if the door closing command is canceled normally, the gap detection device will normally end the detection after a certain delay according to the door closing command status; if the door closing command lasts for more than the upper limit of the accumulated time, the gap detection device will normally end the detection according to the accumulated time.

[0027] It should be noted that if the gap detection device does not detect the door closing command signal issued by the signal system within the accumulated time, but detects that the platform door is fully closed and the locking state is disconnected and then closed again, the gap detection is activated. This situation corresponds to the situation that a sliding door of the platform door may be abnormally opened and then closed, and the gap detection needs to be restarted to ensure safety.

[0028] In particular, in addition to adopting a passive control method of starting or ending the gap detection function based on the closed and locked status information of the sliding door, the gap detection device can also adopt an active control method of starting or ending the gap detection function based on whether the platform door system has received a door closing command signal sent by the signal system; specifically, the gap detection device monitors in real time whether the platform door system has received the door closing command signal sent by the signal system. If it is detected that the platform door system has received the door closing command signal sent by the signal system, the gap detection device controls itself to be in a gap detection state; if it is detected that the platform door system has not received the door closing command signal sent by the signal system, the gap detection device controls itself to be in a sleep state and does not perform gap detection.

[0029] It is understandable that the gap detection device can also be set up with both active control and passive control modes. In practical applications, detection is performed as long as the start conditions of active control or passive control are met, and detection is ended when the end conditions of active control or passive control are met.

[0030] It should be noted that in actual operation, the sliding door of the platform door system is closed first, and then the door of the train is closed. This delay is usually between 1 second and 3 seconds, so as to give passengers enough time to enter and exit the train to avoid pinching passengers or objects. Therefore, in this embodiment, after the signal system receives the platform door system closed and locked status information, it continues to maintain the door closing command signal until it receives the door fully closed and locked status information, and then cancels the door closing command signal.

[0031] In actual applications, the train doors may be fully closed and the locking status may be abnormally lost. If the above situation occurs before the rear of the train leaves the station, there will be certain safety hazards because the gap detection device has finished detecting. Therefore, between the time when the signal system receives the gap detection end information and controls the train to leave the station, if it detects that the doors are fully closed and the locking status information disappears, the door closing command signal is resent to the platform door system and maintained; When the gap detection device detects the door closing command signal but fails to detect that the platform door is fully closed and the locking state is disconnected and then closed again, the gap detection is started; When it is detected that the vehicle door is fully closed and the locking state information disappears and then reappears, the door closing command signal is cancelled so that the gap detection device ends the detection after detecting that the door closing command signal disappears.

[0032] Example 2 The difference between this embodiment and the first embodiment is that the signal system can set a separate gap detection device control signal to control the start and end of the gap detection device.

[0033] For example, after receiving the door closing command sent by the train, while sending the door closing command signal to the platform door system, a start gap detection command is sent to the gap detection device to control the gap detection device to perform gap detection. While canceling the door closing command signal, an end detection command is sent to the gap detection device to control the gap detection device to end gap detection. This control method can improve the operation and disposal efficiency, reduce the operation and disposal time, and thus ensure the safety and efficiency of urban rail transit.

[0034] Example 3 The difference between this embodiment and embodiment 1 is that the signal system also monitors the sliding door status and the gap detection status in real time.

[0035] At this time, the gap detection device is also provided with a gap detection start switch and a gap detection start indicator light. When the gap detection device does not receive the closed and locked state of the sliding door, the gap detection is started by the gap detection start switch, and the gap detection start indicator light is used to judge whether the gap detection is started, and the interlock is released manually after confirming that there is no foreign matter between the sliding door and the train; When the signal system receives the interlock release status and the gap detection status is normal, it controls the train to leave the station.

[0036] It should be noted that the gap detection device did not receive the information that the sliding door was closed and locked, but monitored that the sliding door was in the interlocked released state, which meant that the sliding door had a fault. At this time, in order to ensure that there were no foreign objects between the platform door and the train, a gap detection was required, and finally, when the gap detection status was normal, the train was controlled to leave the station.

[0037] Example 4 This embodiment provides a platform door system gap detection control system, such as Figure 4 As shown, it includes a signal system, a platform door system, a train system and a gap detection device.

[0038] The signal system is used to periodically read the status information of the train and the platform door system, send a door opening command signal to the platform door system after receiving the door opening command sent by the train; send and maintain the platform door system door closing command after receiving the door closing command sent by the train; and cancel the door closing command after judging that the door fully closed and locked state sent by the train and the platform door fully closed and locked state sent by the platform door system exist at the same time, and control the train to leave the station after receiving the gap detection end information sent by the gap detection device; The platform door system is used to periodically read the status information of the signal system and the platform door system, and control the corresponding sliding door to open after receiving the door opening command sent by the signal system; control the corresponding sliding door to close after receiving the door closing command sent by the signal system, and send the sliding door fully closed and locked status information to the gap detection device after the sliding door is closed; and when there is no foreign matter in the gap detection device, return the closed and locked status of the platform door system to the signal system; The gap detection device is used to start the detection function of the gap detection device to detect whether there is foreign matter in the gap between the platform door and the train after receiving the information that the sliding door is fully closed and locked: when there is foreign matter, the gap detection safety circuit is disconnected, and the gap detection safety circuit is closed after the on-site personnel remove the foreign matter or bypass the gap detection circuit; when there is no foreign matter, the gap detection safety circuit is closed and detection is continued; and after detecting that the door closing command disappears, the detection function of the gap detection is canceled, and the closed and locked status of the platform door system is fed back to the signal system.

[0039] like Figure 2 As shown in the figure, the information interaction process between the platform door system, the gap detection device and the train is as follows: The signal system periodically reads the status information of the train and platform door system, and the platform door system periodically reads the status information of the signal system and platform door system; After receiving the door opening command sent by the train, the signal system sends a door opening command signal to the platform door system. After receiving the command, the platform door system controls the corresponding sliding door to open; After receiving the door closing command from the train, the signal system sends the platform door system door closing command and maintains it. After receiving the command, the platform door system controls the corresponding sliding door to close. After the sliding door is closed, it sends the sliding door fully closed and locked status information to the gap detection device; After receiving the information that the sliding door is fully closed and locked, the gap detection device starts the detection function to detect whether there is a foreign object in the gap between the platform door and the train: When there is a foreign object, the gap detection safety circuit is disconnected, the platform door system's total safety circuit is disconnected, and the train cannot leave the station; the signal system continues to maintain the platform door system's door closing command because it has not received the platform door system's closed and locked status. After the on-site personnel remove the foreign object or bypass the gap detection circuit, the gap detection safety circuit is closed, the platform door system's total safety circuit is closed, and the platform door system's closed and locked status is fed back to the signal system; When there is no foreign object, the gap detection safety circuit is closed, the platform door system total safety circuit is closed, the platform door system returns the closed and locked state to the signal system, and the gap detection device continues to detect; The signal system determines whether the door fully closed and locked state issued by the train and the platform door fully closed and locked state issued by the platform door system exist at the same time. If both exist, the door closing command sent to the platform door system is cancelled. After the gap detection device detects that the door closing command sent to the platform door system disappears, it ends the detection and sends the gap detection end information to the signal system. After the gap detection device ends the detection, the gap detection safety circuit remains closed. The signal system controls the train to leave the station normally.

[0040] It should be noted that the signal system can also set a separate gap detection device control signal to control the start and end of the gap detection device. For example, after receiving the door closing command sent by the train, while sending the door closing command signal to the platform door system, a start gap detection command is sent to the gap detection device to control the gap detection device to perform gap detection. While canceling the door closing command signal, an end detection command is sent to the gap detection device to control the gap detection device to end gap detection. This control method can improve operational handling efficiency and reduce operational handling time, thereby ensuring the safety and efficiency of urban rail transit.

[0041] In particular, the signal system may also send a start gap detection command to the gap detection device while sending a door closing command signal to the platform door system; During the closing process of the sliding door, if the gap detection device does not detect any foreign matter, the sliding door closes normally; During the closing process of the sliding door, if the gap detection device detects a foreign object, the abnormal state of the gap detection will be fed back to the sliding door DCU (Door Control Unit, door machine controller, referred to as DCU), and the sliding door DCU will start the sliding door anti-pinch function until it receives the feedback from the gap detection device that there is no abnormal state of the gap detection, and then start the sliding door closing action again; The signal system sends a detection end command to the gap detection device while canceling the door closing command signal.

[0042] Furthermore, in practical applications, in order to solve the possible safety problem that the gap detection device cannot detect the abnormal opening of the train door, the signal system controls the train to leave the station after receiving the gap detection end message. If it is detected that the door is fully closed and the locking state information disappears, the door closing command signal is re-sent to the platform door system and maintained, so that the gap detection device can start the gap detection when it detects the door closing command signal but does not detect that the platform door is fully closed and the locking state is disconnected and then closed again; When it is detected that the vehicle door is fully closed and the locking state information disappears and then reappears, the door closing command signal is cancelled so that the gap detection device ends the detection after detecting that the door closing command signal disappears.

[0043] Furthermore, the gap detection device is also provided with a gap detection start switch and a gap detection start indicator light; the gap detection start indicator light is used to indicate whether the gap detection is started; When the sliding door cannot be closed normally, the gap detection is started through the gap detection start switch, and the gap detection start indicator light confirms the start of the gap detection, until it is detected that there is no foreign matter between the sliding door and the train, and then the interlocking of the sliding door is released; the interlocking release operation of the sliding door is: insert the "interlock release" key switch with a special key, turn it clockwise to the "release" position and keep it, and release the "interlock release" key switch only when the train leaves the platform and drives to the safe area (the tail of the train clears the head end exit signal). After releasing, the "interlock release" indicator light goes out.

[0044] When the signal system detects that the sliding door is in the interlock release state, the gap detection state is normal, and the doors are fully closed and locked, the train will be controlled to leave the station.

[0045] The above technical solution can solve the problem that when the sliding door fails to close normally, the gap detection does not perform gap detection because it cannot receive the sliding door status, resulting in an inability to determine whether the platform door and the train are safe.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A control method for a platform door system gap detection device, characterized in that: The following steps are involved: The signal system periodically reads the status information of the train and platform door system, and the platform door system periodically reads the status information of the signal system and platform door system; After receiving the door opening command sent by the train, the signal system sends a door opening command signal to the platform door system. After receiving the command, the platform door system controls the corresponding sliding door to open; After receiving the door closing command from the train, the signal system sends the platform door system door closing command and maintains it. After receiving the command, the platform door system controls the corresponding sliding door to close. After the sliding door is closed, it sends the sliding door fully closed and locked status information to the gap detection device; After receiving the information that the sliding door is fully closed and locked, the gap detection device starts the detection function to detect whether there is a foreign object in the gap between the platform door and the train: When there is a foreign object, the gap detection safety circuit is disconnected, the platform door system's total safety circuit is disconnected, and the train cannot leave the station; the signal system continues to maintain the platform door system's door closing command because it has not received the platform door system's closed and locked status. After the on-site personnel remove the foreign object or bypass the gap detection circuit, the gap detection safety circuit is closed, the platform door system's total safety circuit is closed, and the platform door system's closed and locked status is fed back to the signal system; When there is no foreign object, the gap detection safety circuit is closed, the platform door system total safety circuit is closed, the platform door system returns the closed and locked state to the signal system, and the gap detection device continues to detect; The signal system determines whether the door fully closed and locked state issued by the train and the platform door fully closed and locked state issued by the platform door system exist at the same time. If both exist, the door closing command sent to the platform door system is cancelled. After the gap detection device detects that the door closing command sent to the platform door system disappears, it ends the detection and sends the gap detection end information to the signal system. After the gap detection device ends the detection, the gap detection safety circuit remains closed. The signal system controls the train to leave the station normally.

2. A platform door system gap detection device control method according to claim 1, characterized in that: Between the time when the signal system receives the gap detection end information and controls the train to leave the station, if it is detected that the doors are fully closed and the locking status information disappears, the door closing command signal is sent to the platform door system again and maintained; When the gap detection device detects the door closing command signal but fails to detect that the platform door is fully closed and the locking state is disconnected and then closed again, the gap detection is started; When it is detected that the vehicle door is fully closed and the locking state information disappears and then reappears, the door closing command signal is cancelled so that the gap detection device ends the detection after detecting that the door closing command signal disappears.

3. A platform door system gap detection device control method according to claim 1 or 2, characterized in that: The gap detection device accumulates time after starting detection; within the accumulated time, if the door closing command is canceled normally, the gap detection device will normally end the detection after a certain delay according to the door closing command status; if the door closing command lasts for more than the upper limit of the accumulated time, the gap detection device will normally end the detection according to the accumulated time.

4. A platform door system gap detection device control method according to claim 1, characterized in that: The gap detection device is also provided with a gap detection start switch and a gap detection start indicator light. When the gap detection device does not receive the closed and locked state of the sliding door, the gap detection is started by the gap detection start switch, and the gap detection start indicator light is used to judge whether the gap detection is started, and the interlock is released manually after confirming that there is no foreign matter between the sliding door and the train; When the signal system receives the interlock release status and the gap detection status is normal, it controls the train to leave the station.

5. A platform door system gap detection device control method according to claim 1, characterized in that: It is also possible to send a start gap detection command to the gap detection device while sending a door closing command signal to the platform door system; and to send an end detection command to the gap detection device while canceling the door closing command signal.

6. A platform door system gap detection device control system, comprising a signal system, a platform door system, a train system and a gap detection device; The signal system is used to periodically read the status information of the train and the platform door system, send a door opening command signal to the platform door system after receiving the door opening command sent by the train; send and maintain the platform door system door closing command after receiving the door closing command sent by the train; and cancel the door closing command after judging that the door fully closed and locked state sent by the train and the platform door fully closed and locked state sent by the platform door system exist at the same time, and control the train to leave the station after receiving the gap detection end information sent by the gap detection device; The platform door system is used to periodically read the status information of the signal system and the platform door system, and control the corresponding sliding door to open after receiving the door opening command sent by the signal system; control the corresponding sliding door to close after receiving the door closing command sent by the signal system, and send the sliding door fully closed and locked status information to the gap detection device after the sliding door is closed; and when there is no foreign matter in the gap detection device, return the closed and locked status of the platform door system to the signal system; The gap detection device is used to start the detection function of the gap detection device to detect whether there is a foreign object in the gap between the platform door and the train after receiving the information that the sliding door is fully closed and locked: when there is a foreign object, the gap detection safety circuit is disconnected, and after the on-site personnel remove the foreign object or bypass the gap detection circuit, the gap detection safety circuit is closed; when there is no foreign object, the gap detection safety circuit is closed and detection continues; And after detecting that the door closing command disappears, the detection function of the gap detection is canceled, and the closed and locked status of the platform door system is fed back to the signal system.

7. A platform door system gap detection device control method according to claim 6, characterized in that: The gap detection device accumulates time after starting detection; within the accumulated time, if the door closing command is canceled normally, the gap detection device will normally end the detection after a certain delay according to the door closing command status; if the door closing command lasts for more than the upper limit of the accumulated time, the gap detection device will normally end the detection according to the accumulated time.

8. A platform door system gap detection device control system according to claim 6 or 7, characterized in that: The signal system can also send a start gap detection command to the gap detection device while sending a door closing command signal to the platform door system; During the closing process of the sliding door, if the gap detection device does not detect any foreign matter, the sliding door closes normally; During the closing process of the sliding door, if the gap detection device detects a foreign object, the abnormal state of the gap detection will be fed back to the sliding door DCU, and the sliding door DCU will start the sliding door anti-pinch function until it receives feedback from the gap detection device that there is no abnormal state of the gap detection, and then starts the sliding door closing action again; The signal system sends a detection end command to the gap detection device while canceling the door closing command signal.

9. A platform door system gap detection device control system according to claim 8, characterized in that: After receiving the gap detection end message, the signal system controls the train to leave the station. If it detects that the doors are fully closed and the locking state information disappears, it resends the door closing command signal to the platform door system and keeps it, so that the gap detection device can start the gap detection when it detects the door closing command signal but does not detect that the platform door is fully closed and the locking state is disconnected and then closed again; When it is detected that the vehicle door is fully closed and the locking state information disappears and then reappears, the door closing command signal is cancelled so that the gap detection device ends the detection after detecting that the door closing command signal disappears.

10. A platform door system gap detection device control system according to claim 8, characterized in that: The gap detection device is also provided with a gap detection start switch and a gap detection start indicator light; the gap detection start indicator light is used to indicate whether the gap detection is started; When the sliding door cannot be closed normally, the gap detection is started by the gap detection start switch, and the gap detection start indicator light is used to confirm the start of the gap detection, and the interlocking of the sliding door is released only when it is detected that there is no foreign object between the sliding door and the train; When the signal system detects that the sliding door is in the interlock release state, the gap detection state is normal, and the doors are fully closed and locked, the train will be controlled to leave the station.

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