Gap detection method and gap detection system

Abstract

The invention discloses a gap detection method and system, and the method comprises the steps: an interlocking system obtains the occupation state information of a platform rail, and transmits the information to a platform door control system, and the platform door control system obtains the opening and closing state information of a platform door, and the platform door control system sends the platform rail occupation state information and the platform door opening and closing state information to gap detection equipment. And the gap detection equipment executes gap detection operation according to the platform rail occupation state information and the platform door opening and closing state information, and sends a gap detection result to a platform door control system. And the platform door control system calculates the gap detection result, obtains platform door locking state information and sends the information to the interlocking system. According to the gap detection method and the gap detection system, the operation time required for controlling the gap detection system to start / stop can be saved, and the safety of the control method of the gap detection system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of urban rail transit, and in particular to a gap detection method and a gap detection system. Background Art

[0002] For existing gap detection systems, the interlocking system usually sends a "gap detection start" signal to the platform door control system, which is then sent to the gap detection device to start the gap detection device and start gap detection. The gap detection device generates a gap detection result and sends the gap detection result to the interlocking system through the platform door control system. The interlocking system generates a "gap detection stop" signal based on the gap detection result and sends it to the platform door control system, which is then sent to the gap detection device. The gap detection device stops gap detection and puts the gap detection device into standby mode. This process requires multi-level system conversion, and the time required to control the start / stop of the gap detection device is long. It also requires the interlocking system to be able to perform logical calculations based on the signals sent by the gap detection device to control the start / stop of the gap detection device, which increases the production cost of the interlocking system. Summary of the Invention

[0003] The object of the present invention is to provide a gap detection method and a gap detection system, which save the operation time required for controlling the start / stop of the gap detection system and improve the safety of the control method of the gap detection system.

[0004] In order to achieve the above object, the present invention provides a gap detection method, comprising:

[0005] The interlocking system obtains platform rail occupancy status information and sends it to the platform door control system. The platform door control system obtains platform door opening and closing status information. The platform door control system sends the platform rail occupancy status information and the platform door opening and closing status information to the gap detection device.

[0006] The gap detection device performs a gap detection operation according to the platform rail occupancy status information and the platform door opening and closing status information, and sends the gap detection result to the platform door control system;

[0007] The platform door control system calculates the gap detection results to obtain the platform door locking status information and sends it to the interlocking system.

[0008] Optionally, when the platform track occupancy status information changes from "unoccupied" to "occupied", and the platform door opening and closing status information changes from "closed" to "open" and then to "closed", the gap detection device enters the detection mode and starts detecting whether there are foreign objects between the platform door and the train.

[0009] Optionally, after the gap detection device is in the gap detection mode, the platform rail occupancy status information changes from "occupied" to "unoccupied", and the platform door opening and closing status information remains "closed", then the gap detection device enters the standby mode and stops detecting.

[0010] Optionally, after the gap detection device enters the standby mode and before entering the detection mode, the platform rail occupancy status information changes from "unoccupied" to "occupied", and the platform door opening and closing status information remains "closed", then the gap detection device enters the first preset mode;

[0011] After the gap detection device enters the first preset mode, the platform door opening and closing status information changes from "closed" to "open", and the platform rail occupancy status information remains "occupied", then the gap detection device enters the second preset mode.

[0012] Optionally, when the gap detection device is in the second preset mode, the gap detection result is preset to "there is foreign object"; when the gap detection device enters the detection mode from the second preset mode, the gap detection device generates an actual gap detection result based on whether there is a foreign object between the platform door and the train.

[0013] Optionally, when the gap detection device is powered on, the gap detection device enters a standby mode and does not perform detection.

[0014] Optionally, if the train's stop time at the platform is greater than or equal to the preset departure time, the gap detection device enters a detection bypass mode, and a manual operation causes the gap detection device to send a gap detection result of "no foreign object" to the platform door control system;

[0015] Among them, the preset departure time is the maximum time that the gap detection equipment allows the train to stop at the platform.

[0016] Optionally, the gap detection device performs a self-check in real time, and when the gap detection device detects a fault, the gap detection device enters a fault mode;

[0017] When the gap detection device is in fault mode, the gap detection device sends the gap detection result "foreign object" to the platform door control system to forcibly set the initial value of its gap detection result to "foreign object". If the train's stop time at the platform is greater than or equal to the preset departure time, the gap detection device enters the detection bypass mode.

[0018] Optionally, when the gap detection device cannot maintain the standby mode and cannot enter the first preset mode, or when the gap detection device cannot maintain the first preset mode and cannot enter the second preset mode, or when the gap detection device cannot maintain the second preset mode and cannot enter the detection mode, the gap detection device enters the exception handling mode;

[0019] When the gap detection device is in the abnormal handling mode, the initial value of its gap detection result is forcibly set to "foreign matter"; when the platform door opening and closing status information of the gap detection device is "closed", the gap detection device enters the detection mode; when the platform door opening and closing status information of the gap detection device is "open", the gap detection device continues to maintain the abnormal handling mode. If the train's stop time at the platform is greater than or equal to the preset departure time, the gap detection device enters the detection bypass mode.

[0020] Optionally, the method of powering on the gap detection device and entering the standby mode includes:

[0021] After the gap detection device is powered on, it enters a power-on self-test to determine whether the hardware of the gap detection device is faulty;

[0022] When the gap detection device detects a hardware fault during power-on self-test, it will enter a power-on self-test dead loop and issue a fault alarm.

[0023] When the gap detection device is powered on and self-tested and no hardware fault is found, the gap detection device will enter standby mode.

[0024] In addition, the present invention also provides a gap detection system for use in the above-mentioned gap detection method, comprising:

[0025] Interlocking system, collecting platform and track occupancy status information;

[0026] The platform door control system collects information on the opening and closing status of the platform doors; the platform door control system transmits signals in a two-way manner with the interlocking system, receives information on the occupancy status of the platform rails from the interlocking system, and sends information on the locking status of the platform doors to the interlocking system to control train departures;

[0027] The gap detection device transmits two-way signals with the platform door control system, receives the platform door opening and closing status information and platform track occupancy status information sent by the platform door control system, and sends the gap detection results to the platform door control system;

[0028] Among them, after the platform door control system receives the gap detection result of "no foreign objects", it generates platform door locking status information and sends it to the interlocking system, which controls the train to leave the station.

[0029] Optionally, the gap detection device includes:

[0030] The signal receiving end is connected to the platform door control system via a first signal line to receive platform door opening and closing status information sent by the platform door control system; and is connected to the platform door control system via a second signal line to receive platform track occupancy status information sent by the platform door control system;

[0031] Signal output terminal, connected to the platform door control system to send the gap detection results generated by the gap detection equipment;

[0032] The detection end includes: a detection component for detecting foreign objects, the detection component generates a monitoring output result reflecting whether a foreign object is detected, and the monitoring output result serves as a basis for the gap detection device to generate a gap detection result.

[0033] Optionally, the gap detection device further includes an alarm terminal, which is used to generate a fault alarm during the power-on self-test process of the gap detection device.

[0034] Optionally, it also includes:

[0035] The bypass switch has two ends connected to the platform door control system and the gap detection device respectively. By manually operating the bypass switch, the platform door control system receives the gap detection result of "no foreign matter".

[0036] Optionally, it also includes:

[0037] A forced switch is connected to the gap detection device, and manual operation of the forced switch causes the gap detection device to start detecting whether there is a foreign object between the platform door and the train.

[0038] Compared with the prior art, the technical solution of the present invention has at least the following beneficial effects:

[0039] The gap detection system described in the present invention does not require the gap detection device to receive a clear start / stop signal for control. The gap detection device is controlled to start or stop only according to the combined changes of the platform door opening and closing status and the platform rail occupancy status, saving the operation time required to control the start / stop of the gap detection device.

[0040] Compared with the prior art, the gap detection system described in the present invention only has software upgrades (i.e., the gap detection method is changed), but there is no change in the hardware of the equipment, which saves the cost of upgrading the gap detection system and also makes the gap detection system described in the present invention have good adaptability.

[0041] The gap detection method described in the present invention divides the working process of the gap detection device into a standby mode, a first preset mode, a second preset mode and a detection mode required for a normal working cycle. In addition, in each of the above modes (that is, each time the gap detection device receives the platform track occupancy status or the platform door opening and closing status), an exception handling mode is used to prevent the gap detection device from being mixed / broken. Manual intervention is performed through the detection bypass mode to prevent the gap detection device from being unable to send "gap detection result = 1" for a long time (exceeding the preset departure time) and causing the train to be unable to leave the station. The fault mode is used to prevent the gap detection device from self-failure in the normal working cycle to ensure that the train can leave the station in time, and the gap detection device is prevented from outputting a "gap detection result = 1" signal in an unsafe state so that the train meets the conditions for leaving the station and thus causes an accident, thereby improving the safety of the gap detection method. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Schematic diagram of a gap detection system in the prior art.

[0043] Figure 2 Schematic diagram of the gap detection system according to the present invention.

[0044] Figure 3 This is a schematic diagram of the connection relationship between the platform door control system and the gap detection system in the gap detection system of the present invention.

[0045] Figure 4 This is a flow chart of the gap detection method described in the present invention.

[0046] Figure 5 This is a flow chart of detecting the bypass mode in the gap detection method of the present invention.

[0047] Figure 6 This is a flow chart of the failure modes in the gap detection method of the present invention.

[0048] Figure 7 This is a flow chart of the abnormality handling mode in the gap detection method described in the present invention.

[0049] In the figure, 1-interlocking system, 2-platform door control system, 3-gap detection equipment, 31-signal receiving end, 32-signal output end, 33-alarm end, 4-bypass switch, 5-force switch, 6-power module, 71-standby mode, 72-first preset mode, 73-second preset mode, 74-detection mode, 75-detection bypass mode, 76-fault mode, 77-abnormal handling mode. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical connections; direct connections or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] In the prior art, such as Figure 1 As shown, the gap detection system includes: an interlocking system 1, a platform door control system 2, and a gap detection device 3. The interlocking system 1 and the platform door control system 2 transmit signals in a two-way manner, and can send a "gap detection start" (QDJXTC) signal and a "gap detection stop" (TZJXTC) signal to the platform door control system 2; and can receive a "gap detection result" (PDWZA) sent by the platform door control system 2. The platform door control system 2 and the gap detection device 3 transmit signals in a two-way manner, and can send a "gap detection start" signal and a "gap detection stop" signal to the gap detection system 3; and receive a "gap detection result" signal from the gap detection device 3. The gap detection device 3 can start according to the "gap detection start" signal, perform gap detection, and generate a "gap detection result" signal; or it can stop gap detection according to the "gap detection stop" signal and enter a stopped state.

[0054] At the same time, a gap detection bypass (JXTCBYPASS) is provided between the gap detection device 3 and the platform door control system 2 to realize the manual sending of the "gap detection result". When the gap detection bypass is enabled on the gap detection device 3, the manually obtained "gap detection result" can be sent to the platform door control system 2 and then to the interlocking system 1.

[0055] When the platform doors are fully closed and gap detection needs to begin, interlocking system 1 sends a "gap detection start" signal to platform door control system 2. Platform door control system 2 then transmits this signal to gap detection device 3, causing gap detection device 3 to start (change from a stopped state to an active state) and begin gap detection. When gap detection device 3 determines there is no foreign object between the train and the platform door, gap detection device 3 sends a "gap detection result" of 1 to platform door control system 2 (indicating there is no foreign object between the train and the platform door), which is then sent to interlocking system 1. Thereafter, interlocking system 1 sends a "gap detection stop" signal to platform door control system 2, which is then sent to gap detection device 3 via platform door control system 2, causing gap detection device 3 to return to a stopped state.

[0056] In the prior art, the process of controlling the start / stop of the gap detection device 3 requires multi-level system conversion, which makes the time required to control the start / stop of the gap detection device 3 long; and the interlocking system 1 is required to be able to calculate the start / stop of the gap detection device 3 based on the signal logic sent by the gap detection device 3, which increases the production cost of the interlocking system 1.

[0057] In order to solve the above technical problems, Figure 2 As shown, the present invention provides a gap detection system comprising: an interlocking system 1, a platform door control system 2, and a gap detection device 3. The interlocking system 1 can collect platform rail occupancy status information and perform bidirectional signal transmission with the platform door control system 2, sending the platform rail occupancy status information to the platform control system. The platform door control system 2 can collect platform door opening and closing status information to monitor whether all platform doors are closed. The platform door control system 2 is in bidirectional signal communication with the gap detection device 3, sending platform door opening and closing status information and platform rail occupancy status information to the gap detection device 3. The platform door control system 2 can generate platform door lock status (PDKJ) information and send it to the interlocking system 1 for controlling train departure. The gap detection device 3 generates a gap detection result based on the platform door opening and closing status information and the platform rail occupancy status information to monitor the presence of foreign objects between the platform door and the train. The gap detection device 3 then sends the gap detection result to the platform door control system 2. The platform door lock status information is generated based on the gap detection result.

[0058] Furthermore, in order to prevent the gap detection results from not being sent or received in time, there is a gap detection bypass between the gap detection device 3 and the platform door control system 2, which is used to manually determine whether there are foreign objects between the platform door and the train, and send the manually obtained gap detection results to the platform door control system 2.

[0059] When the platform door lock status is 1, it indicates that the train meets the conditions for leaving the station; when the platform door lock status is 0, it indicates that the train does not meet the conditions for leaving the station. When the platform track occupation status is 1, it indicates that the track is not occupied, that is, the train has left the station; when the platform track occupation status is 0, it indicates that the track is occupied, that is, the train has entered the station. When the platform door open and closed status is 1, it indicates that the platform doors are all closed; when the platform door open and closed status is 0, it indicates that the platform doors are not closed.

[0060] Specifically, such as Figure 3 As shown, the gap detection device 3 and platform door control system 2 are installed in the platform equipment room and are powered by a power module 6. The gap detection device 3 includes a power supply terminal, a signal receiving terminal 31, a signal output terminal 32, an alarm terminal 33, and a detection terminal 33. The power supply terminal is connected to the power module 6. The signal receiving terminal 31 is connected to the platform door control system 2 via two first signal lines to receive the platform door open and closed status from the platform door control system 2; and via two second signal lines to receive the platform track occupancy status from the platform door control system 2.

[0061] The signal output terminal 32 is connected to the platform door control system 2 to transmit the gap detection result generated by the gap detection device 3. When the gap detection device 3 determines that there is no foreign object between the train and the platform door, the gap detection device 3 and the platform door control system 2 are energized to transmit "gap detection result = 0" to the platform door control system 2. If there is a foreign object between the train and the platform door, the gap detection device 3 emits an audible and visual alarm to alert the operator or passengers.

[0062] The alarm terminal 33 is used for generating a fault alarm during the power-on self-test process of the gap detection device 3 to remind the operator to repair the gap detection device 3 as soon as possible.

[0063] The detection end 33 includes: a detection component for detecting foreign objects, which can be a laser radar or other equipment. The detection component generates a monitoring output result reflecting whether a foreign object is detected, and the monitoring output result serves as the basis for the gap detection device 3 to generate a gap detection result.

[0064] Furthermore, in order to prevent the gap detection device 3 from being unable to depart for a long time, the gap detection system also includes: a bypass switch 4, the two ends of which are respectively connected to the platform door control system 3 and the gap detection device 3. By manually operating the bypass switch 4, the platform door control system 2 receives the gap detection result of "no foreign objects".

[0065] Specifically, a preset departure time can be manually set. If the gap detection device 3 fails to send a gap detection result for a long time (i.e., the train stays on the track for longer than the preset departure time), a foreign object between the platform door and the train will be manually determined. If no foreign object is found between the platform door and the train, the bypass switch 4 will be closed, so that the platform door control system 2 receives a gap detection result of 1. The preset departure time is the maximum time that the gap detection device 3 allows a train to stop at the platform.

[0066] Furthermore, in order to prevent the gap detection device 3 from starting detection within the preset departure time, the gap detection system also includes: a forced switch 5, which is connected to the gap detection device 3, and the forced switch 5 is manually operated to enable the gap detection device 3 to start detecting whether there is a foreign object between the platform door and the train.

[0067] Specifically, the gap detection device 3 manually activates automatic gap detection via the forced switch 5. When the gap detection device 3 is unable to receive the platform track occupancy status and platform door opening / closing status for a long period of time, the track occupancy and platform door closing status are manually observed. When the track is occupied and the platform doors are all closed, the forced switch 5 is closed, causing the gap detection device 3 to directly start gap detection to check whether there are any foreign objects between the train and the platform door. This operation is equivalent to manually causing the gap detection device 3 to receive the platform track occupancy status and platform door opening / closing status (platform track occupancy status = 0, platform door opening / closing status = 1), and then start gap detection.

[0068] Controlling the operation of gap detection device 3 via bypass switch 4 or via forced switch 5 is an option available to the operator when gap detection device 3 is unable to initiate detection on its own. Typically, for a straight platform, the operator can directly observe the conditions between the platform door and the train to control the closing of bypass switch 4. For a curved platform, where line of sight is obstructed and the operator cannot quickly observe the conditions between all platform doors and the train, forced switch 5 can be used to allow gap detection device 3 to complete detection on its own.

[0069] like Figure 2 As shown, when using the gap detection system of the present invention, after a train enters the station, the interlocking system 1 collects and sends the platform track occupancy status (i.e., platform track occupancy status = 0) to the platform door control system 2. The platform door control system 2 collects the platform door opening and closing status (i.e., platform door opening and closing status = 1) and sends the platform track occupancy status and platform door opening and closing status to the gap detection device 3. At this time, the gap detection device 3 is in a stopped state and maintains the gap detection result as 1, ensuring that the train can enter the station.

[0070] After the train enters the station, the train doors open and the platform doors also open. At this time, the platform door control system 2 collects the platform door status (i.e., platform door open / close status = 0) and sends the platform door open / close status to the gap detection device 3. At this time, the gap detection device 3 is in the stopped state and maintains the gap detection result as 1.

[0071] Afterwards, the train door closes and the platform door also closes. At this time, the platform door control system 2 again collects the platform door status (platform door open / close status = 1) and sends the platform door open / close status to the gap detection device 3. At this time, the gap detection device 3 is in a stopped state, and the gap detection result is preset to 0. This facilitates the gap detection device 3 to output a true "gap detection result = 1" signal after startup. This ensures that the train cannot leave the station if the gap detection device 3 detects a foreign object between the train and the platform door (gap detection result = 0), thereby improving the safety of the gap detection device 3.

[0072] Then, the gap detection device 3 is started, begins detection, and sends the actual gap detection result to the platform door control system 2.

[0073] Specifically, when there are no foreign objects between the train and the platform door, the gap detection device 3 generates an actual gap detection result of 1 and sends it to the platform door control system 2. Based on the gap detection result, the platform door lock status (PDKJ) is generated by the platform door lock status 2. At this time, the platform door lock status is 1, and the platform door lock status is sent to the interlocking system 1, so that the train meets the exit conditions. Then, after the train leaves the station, the interlocking system 1 re-detects the track occupancy status (i.e., platform track occupancy status = 1) and sends it to the platform door control system 2. The platform door control system 2 collects the platform door closing status (i.e., platform door open / close status = 1). Then, the platform door control system 2 sends both the track occupancy status and the platform door open / close status to the gap detection device 3, causing the gap detection device 3 to return to the stopped state.

[0074] When there is a foreign object between the train and the platform door, the gap detection device 3 generates an actual gap detection result of 0 and sends it to the platform door control system 2; the platform door control system 2 generates a platform door locking state (PDKJ result) based on the gap detection result. At this time, the platform door locking state is 0, and the train fails to meet the exit conditions. The gap detection device 3 will continue to detect during this period until there is no foreign object between the train and the platform door, or manual detection is performed (manually closing the bypass switch 4).

[0075] Compared with the prior art in which the interlocking system 1 needs to send a "gap detection start" signal and a "gap detection stop" signal to control whether the gap detection device 3 is turned on, the gap detection system described in the present invention controls the start of the gap detection device 3 through the platform track occupancy status information and the platform door opening and closing status information to detect the situation between the train and the platform door, thereby shortening the overall operation time of controlling the gap detection device 3 to start gap detection.

[0076] Based on the above gap detection system, such as Figure 4 As shown, the present invention also provides a gap detection method. The interlocking system 1 obtains platform rail occupancy status information and transmits it to the platform door control system 2. The platform door control system 2 obtains platform door opening and closing status information. The platform door control system 2 transmits the platform rail occupancy status information and the platform door opening and closing status information to the gap detection device 3. The gap detection device 3 performs a gap detection operation based on the platform rail occupancy status information and the platform door opening and closing status information, and transmits the gap detection result to the platform door control system 2. The platform door control system 2 calculates the gap detection result, obtains platform door locking status information, and transmits it to the interlocking system.

[0077] Specifically, the gap detection device 3 employs a trigger-activated delayed standby operating mode design. Its cyclic operation is divided into multiple operating modes based on the combination of the platform door open / closed state and the platform track occupancy state. These operating modes include: standby mode 71, first preset mode 72, second preset mode 73, and detection mode 74. When the gap detection device is operating normally, it sequentially enters standby mode 71, first preset mode 72, second preset mode 73, and detection mode 74 as trains enter and exit the station.

[0078] Standby mode 71 indicates that the train has not yet entered the station, and the gap detection device 3 has completed the previous cycle of detection and entered standby mode 71, or the gap detection device 3 has just been powered on and is in standby mode 71. Specifically, when the gap detection device 3 is powered on, it enters standby mode 71; or when the gap detection device 3 enters standby mode 71 from detection mode 74. At this time, the gap detection device 3 continuously transmits the clearness of the platform and train (i.e., continuously transmits the gap detection result as 1), and maintains the platform door open / closed status and platform track occupied status as 1.

[0079] The first preset mode 72 indicates that after the train enters the station, the gap detection device 3 has received information indicating track occupancy (i.e., the platform track occupancy status changes from 1 to 0); however, the platform door opening / closing status has not changed (at this point, neither the train door nor the platform door is open), and the "platform door opening / closing status = 1" state from the previous cycle is maintained. That is, the platform track occupancy status information changes from 1 to 0 (i.e., "unoccupied" to "occupied"), and the platform door opening / closing status information remains at 1 (i.e., "closed"), and the gap detection device 3 enters the first preset mode 72. At this point, the gap detection device 3 remains in a stopped state and forcibly maintains a clear state between the platform and the train (i.e., gap detection result = 1).

[0080] The second preset mode 73 indicates that after the train enters the station and the platform door opens, the gap detection device 3 has updated the platform door opening / closing status (i.e., the platform door opening / closing status has changed from 1 to 0). At this point, the platform door opening / closing status information of the gap detection device 3 is 0. Specifically, the platform door opening / closing status information changes from 1 to 0 (i.e., "closed" to "open"), while the platform track occupancy status information remains at 0 (i.e., "occupied"). The gap detection device 3 then enters the second preset mode 73. At this point, the gap detection device 3 remains in a stopped state, and the gap detection result of the gap detection device 3 is preset to 0 (i.e., "foreign object present"). This facilitates the gap detection device 3's subsequent output of the actual gap detection result. This also ensures that the gap detection device 3 does not send a "gap detection result = 1" message to the platform door control system 2 upon startup, providing sufficient time for the gap detection device 3 to perform gap detection and improving the safety of the gap detection method of the present invention.

[0081] The detection mode 74 indicates that after the train doors and the platform doors are closed, the gap detection device 3 has received the information that all the platform doors are closed (the platform door opening and closing status has changed from 0 to 1). At the same time, the gap detection device 3 becomes the starting state and starts to detect whether there is any foreign object between the train and the platform door.

[0082] Specifically, if the platform track occupancy status information remains at 0 (i.e., "occupied") and the platform door open / close status information changes from 0 to 1 (i.e., "open" to "closed"), the gap detection device 3 enters detection mode 74 and begins detecting the presence of foreign objects between the platform door and the train, generating an actual gap detection result. After detection begins, if an obstacle is detected, the gap detection result is 0; if no obstacle is detected, the gap detection result is 1. At this point, the platform door control system 2 generates platform door locked status information and sends it to the interlocking system 1, allowing the train to depart the station.

[0083] Among them, after the gap detection device 3 is started, it usually performs gap detection for 10s (detection time) to determine whether there is a foreign object between the train and the platform door, and uses the final judgment result as the gap detection result; and the detection time can be adjusted between 0-60s.

[0084] When the train leaves the station, the track becomes unoccupied again and the platform door remains closed, that is, the platform track occupancy status information changes from 0 to 1 (that is, "occupied" to "unoccupied"), and the platform door opening and closing status information remains 1 (that is, "closed"), then the gap detection device 3 enters the standby mode 71 and stops detecting.

[0085] Furthermore, in order to prevent the gap detection device from not working properly and causing the train to fail to leave the station for a long time (that is, the train fails to leave the station within the preset departure time), the working modes of the gap detection device 3 also include: manual detection mode and detection bypass mode 75.

[0086] Detection bypass mode 75 is used to manually observe and determine whether a train can depart the station (i.e., to determine whether there is a foreign object between the train and the platform door). It is suitable for situations where direct human observation is required. If a train fails to depart the station within the preset departure time, gap detection device 3 transmits a bypass signal, bypassing its normal operating cycle and directly monitoring the presence of foreign objects between the train and the track. If no foreign object is present, bypass switch 4 is closed, allowing gap detection device 3 to provide feedback on the presence of foreign objects between the train and the track.

[0087] The manual detection mode is used to manually force the gap detection device 3 to enter the detection mode 74. It is suitable for situations where a train is on a curved platform and manual observation of the gap between the train and the platform door is not possible, or when the gap detection device 3 needs to detect again. The forced switch 5 can be manually closed to control the gap detection device 3 to be forced into the activation state, forcing the gap detection system 3 to enter the detection mode 74.

[0088] For example: in the first scenario, the platform door control system 2 has sent the platform door opening and closing status 1 to the gap detection device 3, but the gap detection device 3 has not received it in time, thereby preventing the train from meeting the exit conditions for a long time (i.e., the train cannot leave the station within the preset departure time). In the second scenario, the platform door control system 2 fails to send the platform door opening and closing status 1 in time, thereby preventing the train from meeting the exit conditions for a long time (i.e., the train cannot leave the station within the preset departure time). For the above two scenarios or other situations that cause the train to be unable to depart for a long time, the gap detection device 3 can adopt two processing methods according to the platform situation. In the first processing method, the forced switch 5 can be manually closed to control the gap detection device 3 to be forced into the start state (i.e., forcing the gap detection device 3 to enter the detection mode 74), so that the gap detection device 3 enters the manual detection mode; or, in the second processing method, a bypass signal is sent by the gap detection device 3 to cause the gap detection device 3 to enter the detection bypass mode 75.

[0089] Furthermore, after the first processing method is completed, the gap detection device 3 reopens the forced switch 5, so that the gap detection device 3 is restored to the automatic receiving platform door opening and closing state (that is, restored to the normal working cycle process), and controls the gap detection device 3 to enter the detection mode 74 through the platform door opening and closing state and the platform rail occupancy state.

[0090] It should be noted that whether the gap detection device 3 enters the detection bypass mode 75 or the manual detection mode depends on the operator's selection according to the platform situation.

[0091] Furthermore, in order to prevent the gap detection device 3 from malfunctioning during the working cycle, or preventing the platform door opening and closing status and the platform track occupancy status from appearing in impossible combinations in a certain mode (i.e., standby mode 71, first preset mode 72, second preset mode 73 and detection mode 74) due to signal interference, the gap detection device 3 also includes: a fault mode 76 and an exception handling mode 77.

[0092] Specifically, fault mode 76 is used to prevent the gap detection device 3 from failing during its operating cycle, which could result in the device 3 being unable to output gap detection results. The gap detection device 3 performs real-time self-checks. When it generates a timeout code and a fault code indicating "faulty" to indicate whether it has failed, the gap detection device 3 enters fault mode 76. While in fault mode 76, the initial value of its gap detection result is forced to 0 (i.e., "foreign object present"), preventing the train from departing within the preset departure time and instead entering detection bypass mode 75. Manual operation is then used to determine whether there is a foreign object between the train and the platform door.

[0093] Timeout codes and fault codes are generated during each mode (standby mode 71, first preset mode 72, second preset mode 73, and detection mode 74) of the gap detection device 3 during its normal operating cycle. If the self-test signal of the gap detection device 3 is disconnected, the timeout code of the gap detection device 3 is 1. If a problem such as a mainboard circuit failure, sensor or sensor bus failure occurs in the gap detection device 3, the fault code of the gap detection device 3 is 1. Therefore, when the timeout code or fault code is 1, the gap detection device 3 enters the fault mode 76.

[0094] The abnormal handling mode 77 is used to prevent the platform door opening and closing status and the platform track occupancy status from appearing in a certain mode (i.e., the standby mode 71, the first preset mode 72, the second preset mode 73, and the detection mode 74) due to signal interference; for example: in the first preset mode 72, the gap detection device 3 has received the information that the track is occupied (i.e., the platform track occupancy status = 0), while the platform door opening and closing status remains at 1. At this time, if the gap detection device 3 resets the platform door opening and closing status, the gap detection device 3 will enter the second preset mode 73, and if the gap detection device 3 does not reset the platform door opening and closing status, the gap detection device 3 will still be in the first preset mode 72. Therefore, the combination of the platform door opening and closing status and the platform track occupancy status can only be 10 or 00 under normal circumstances, but if the combination appears to be 11 or 01, it indicates that the gap detection device 3 enters the abnormal handling mode 77. When the gap detection device 3 enters the abnormal handling mode 77, the gap detection device 3 is controlled to jump out of the normal working cycle process. As long as the detection system 3 can receive the situation that all platform doors are closed (that is, the platform door opening and closing status = 1), the gap detection device 3 is controlled to enter the detection mode 74, so that the gap detection device 3 can feedback the foreign object situation between the train and the track.

[0095] Among them, the reasons that may affect the gap detection device 3 entering the abnormal processing mode 77 are line mixing or line breaking. The line mixing is caused by the damage of two signal lines (the first signal line or the second signal line), which causes the damaged signal lines to interfere with each other, causing the platform door opening and closing status or the platform track occupancy status to change from 0 to 1, thereby causing the combination of the two to be abnormal; the line breaking is caused by the damage of two signal lines (the first signal line or the second signal line), which causes the damaged signal lines to interfere with each other, causing the platform door opening and closing status or the platform track occupancy status to change from 1 to 0, thereby causing the combination of the two to be abnormal. Therefore, when the gap detection device 3 cannot maintain the standby mode 71 and cannot enter the first preset mode 72, when the gap detection device 3 cannot maintain the first preset mode 71 and cannot enter the second preset mode 73, or when the gap detection device 3 cannot maintain the second preset mode 73 and cannot enter the detection mode 74, the gap detection device enters the abnormal processing mode 77.

[0096] When the gap detection device 3 is in the abnormal processing mode 77, the initial value of its gap detection result is forced to be "foreign matter"; when the platform door opening and closing status information of the gap detection device 3 is "closed", the gap detection device 3 enters the detection mode 74; when the platform door opening and closing status information of the gap detection device 3 is "open", the gap detection device 3 continues to maintain the abnormal processing mode 77 until the gap detection device 3 enters the detection bypass mode 74; and in the above process, the gap detection device 3 always performs self-inspection, and when the fault code or timeout code is 1 (indicating "fault"), it enters the fault mode 76 to prevent the gap detection device from failing in the abnormal processing mode 77.

[0097] The working conditions of the gap detection device 3 under different track occupancy conditions (platform track occupancy status) and platform door opening and closing conditions (platform door opening and closing status) can be seen in Table 1.

[0098] Table 1 Working conditions of gap detection equipment

[0099]

[0100] In the gap detection method described in the present invention, the gap detection device 3 changes its working mode according to the platform track occupancy status and platform door opening and closing status sent by the platform door control system, and each time the gap detection device 3 changes its working mode, it is necessary to judge whether the gap detection device 3 is working normally to prevent the gap detection device 3 from malfunctioning and ensure that the gap detection device 3 can operate stably and safely.

[0101] Specifically, such as Figure 4 As shown, the control method of the gap detection device 3 is as follows:

[0102] Step S1: The gap detection device is powered on and performs self-test.

[0103] After power is applied to the gap detection device 3, the gap detection device 3 enters a power-on self-test to determine whether the gap detection device 3 has a hardware fault. If the gap detection device 3 finds a hardware fault, the gap detection device 3 enters a power-on self-test endless loop and issues a fault alarm through the alarm terminal 33. If the gap detection device 3 does not find a hardware fault, the gap detection device 3 enters a standby mode 71.

[0104] Among them, the power-on self-test of the gap detection device 3 checks the hardware including: bus activity check of the radar interface CAN, full-link detection of peripherals such as instruction microprogram, clock chip, I / O port, etc.

[0105] Step S2: The gap detection device detects the occupancy status of the track.

[0106] Before the train enters the station, the gap detection device 3 enters standby mode 71 (and the gap detection device 3 is not started but in a stopped state). The gap detection device 3 will forcibly maintain the gap detection result at 1. The gap detection device 3 is initialized so that the platform door open / close status is 1 and the platform track occupancy status is 1. At the same time, the platform track occupancy status in the gap detection device 3 is updated according to the platform track occupancy status sent by the platform door control system 2.

[0107] Step S2.1, determine whether the train leaves the station within the preset departure time.

[0108] When the train fails to leave the station within the preset departure time, the gap detection device 3 will send a bypass signal to control the gap detection device 3 to enter the detection bypass mode 75.

[0109] When the train leaves the station within the preset departure time, step S2.2 is executed.

[0110] Step S2.2, determining whether the gap detection device itself has any fault (ie, self-test), to prevent the gap detection device 3 from having any fault in step S2.

[0111] When the gap detection device 3 is in the self-checking process and a fault code or a timeout code of 1 occurs (i.e., a self-fault occurs), the gap detection device 3 enters the fault mode 76;

[0112] When the gap detection device 3 does not find any fault in itself during self-check (ie, the fault code and the timeout code are both 0), step S2.3 is executed.

[0113] Step S2.3: The gap detection device is updated according to the platform track occupancy status sent by the platform door control system 2, and determines the combination of the platform door opening and closing status and the platform track occupancy status.

[0114] When the track is occupied, the platform door control system 2 sends a platform track occupied status of 0 to the gap detection device 3, causing the platform track occupied status of the gap detection device 3 to change from 1 to 0. At this time, the combination of the platform door open / closed status and the platform track occupied status is 10, and then step S3 is executed to cause the gap detection device 3 to enter the first preset mode 72.

[0115] When the track is not occupied, the platform door control system 2 sends a platform track occupied status of 1 to the gap detection device 3, and the platform track occupied status of the gap detection device 3 remains at 1. At this time, the combination of the platform door open / closed status and the platform track occupied status remains at 11, causing the gap detection device 3 to remain in standby mode 71 and repeat steps S2.1 to S2.3.

[0116] When the signal receiving end 31 of the gap detection device 3 is mixed or broken (that is, the signal line for the gap detection device 3 to receive the platform door opening and closing status or the platform track occupancy status is damaged and is subject to signal interference), the signals of the platform door opening and closing status and the platform track occupancy status are affected, causing the combination of the platform door opening and closing status and the platform track occupancy status to appear as 01 or 00, thereby causing the gap detection device 3 to enter the abnormal processing mode 77.

[0117] Step S3: The gap detection device detects the open or closed status of the platform door.

[0118] When the train enters the station, the platform door control system 2 sends "Platform track occupied status = 0", placing the gap detection device 3 in the first preset mode 72. At this time, the gap detection device 3 will forcibly maintain the gap detection result at 1. At the same time, after the train enters the station and opens the door, the gap detection device 3 updates its platform door open / close status in real time based on the platform door open / close status collected by the platform door control system 2, waiting for the platform door to open.

[0119] Step S3.1, determine whether the train leaves the station within the preset departure time.

[0120] When the train fails to leave the station within the preset departure time, the gap detection device 3 will send a bypass signal to control the gap detection device 3 to enter the detection bypass mode 75.

[0121] When the train leaves the station within the preset departure time, step S3.2 is executed.

[0122] Step S3.2, determining whether the gap detection device itself has any fault (ie, self-test), to prevent the gap detection device from having any fault in step S3.

[0123] When the gap detection device 3 is in the self-checking process and a fault code or a timeout code of 1 occurs (i.e., a self-fault occurs), the gap detection device 3 enters the fault mode 76;

[0124] When the gap detection device 3 is performing self-checking and no fault is found (ie, the fault code and the timeout code are both 0), step S3.3 is executed.

[0125] Step S3.3, determine whether the platform door opening and closing status in the gap detection device has changed, and then determine the combination of the platform door opening and closing status and the platform track occupancy status.

[0126] When the gap detection device 3 starts to reset the platform door opening and closing status to 0, the combination of the platform door opening and closing status and the platform track occupancy status is 00, the gap detection device 3 will enter the second preset mode 73 and execute step S4.

[0127] When the gap detection device 3 fails to reset the platform door opening and closing status, the platform door opening and closing status is still 1. At this time, the combination of the platform door opening and closing status and the platform track occupancy status is 10, so that the gap detection device 3 is still in the first preset mode 72 and repeats steps S3.1-S3.3.

[0128] When the signal receiving end 31 of the gap detection device 3 is mixed or broken (that is, the signal line for the gap detection device 3 to receive the platform door opening and closing status or the platform track occupancy status is damaged and is subject to signal interference), the signals of the platform door opening and closing status and the platform track occupancy status are affected, causing the combination of the platform door opening and closing status and the platform track occupancy status to appear as 11 or 01, thereby causing the gap detection device 3 to enter the abnormal processing mode 77.

[0129] Step S4: The gap detection device detects the open / closed status of the platform door again.

[0130] After the train enters the station, it opens its doors and the platform doors open synchronously, causing the platform door control system 2 to send "safe status = 0" to the gap detection device 3. The gap detection device 3 enters the second preset mode 73 and forces the gap detection result of the gap detection device 3 to be 0, so that the gap detection result output of the actual gap detection result after entering the detection mode 74 is convenient. At the same time, based on the platform door opening and closing status of the platform door control system 2, the gap detection device 3 updates its platform door opening and closing status in real time, waiting for all platform doors to close (i.e., step S5).

[0131] Step S4.1, determine whether the train leaves the station within the preset departure time.

[0132] When the train fails to leave the station within the preset departure time, the control gap detection device 3 enters the detection bypass mode 75.

[0133] When the train leaves the station within the preset departure time, step S4.2 is executed.

[0134] Step S4.2, determining whether the gap detection device itself has any fault (ie, self-test), to prevent the gap detection device from having any fault in step S4.

[0135] When the gap detection device 3 is in the self-checking process and a fault code or a timeout code of 1 occurs (i.e., a self-fault occurs), the gap detection device 3 enters the fault mode 76;

[0136] When the gap detection device 3 does not find any fault in itself during self-check (ie, the fault code and the timeout code are both 0), step S4.3 is executed.

[0137] Step S4.3: The gap detection device is updated according to the platform door opening and closing status sent by the platform door control system 2, and determines the combination of the platform door opening and closing status and the platform track occupancy status.

[0138] When all platform doors are closed, the platform door control system 2 sends a platform door open / close status signal of 1 to the gap detection device 3, causing the platform door open / close status of the gap detection device 3 to change from 0 to 1. At this point, the combination of the platform door open / close status and the platform track occupancy status is 10, and step S5 is then executed to cause the gap detection device 3 to enter the detection mode 74.

[0139] If the platform doors are not fully closed, the platform door control system 2 sends a platform door open / closed status of 0 to the gap detection device 3, and the platform door open / closed status of the gap detection device 3 remains at 0. At this point, the combination of the platform door open / closed status and the platform track occupancy status remains at 00, causing the gap detection device 3 to remain in the second preset mode 73, and repeating steps S4.1 to S4.3.

[0140] When the signal receiving end 31 of the gap detection device 3 is mixed or broken (that is, the signal line for the gap detection device 3 to receive the platform door opening and closing status or the platform track occupancy status is damaged and is subject to signal interference), the signals of the platform door opening and closing status and the platform track occupancy status are affected, causing the combination of the platform door opening and closing status and the platform track occupancy status to appear as 11 or 01, thereby causing the gap detection device 3 to enter the abnormal processing mode 77.

[0141] In step S5, the gap detection device checks the gap between the train and the platform door to see if there is any foreign object, and feeds back to the platform door control system 2, completing the normal working cycle of the gap detection device.

[0142] After the train doors are closed and all platform doors are closed, the platform door control system 2 sends "platform door open and closed status = 1" to the gap detection device 3, so that the gap detection device 3 enters the startup state and detects whether there are foreign objects in the gap between the train and the platform door, and then sends the generated gap detection results to the platform door control system 2 until the train successfully leaves the station, so that the gap detection device 3 re-enters the standby mode 71, completing the normal working cycle of the gap detection device 3.

[0143] Specifically include:

[0144] Step S5.1, determine whether the train leaves the station within the preset departure time.

[0145] When the train fails to leave the station within the preset departure time, the gap detection device 3 will send a bypass signal to control the gap detection device 3 to enter the detection bypass mode 75.

[0146] When the train leaves the station within the preset departure time, step S5.2 is executed.

[0147] Step S5.2, determining whether the gap detection device itself has any fault (ie, self-test), to prevent the gap detection device from having any fault in step S5.

[0148] When the gap detection device 3 is in the self-checking process and a fault code or a timeout code of 1 occurs (i.e., a self-fault occurs), the gap detection device 3 enters the fault mode 76;

[0149] When the gap detection device 3 does not find any fault in itself during self-check (ie, the fault code and the timeout code are both 0), step S5.3 is executed.

[0150] Step S5.3: The gap detection device is updated according to the updated platform track occupancy status, and determines the combination of the platform door opening and closing status and the platform track occupancy status at this time.

[0151] When there are no foreign objects between the train and the platform door, the gap detection device 3 sends a gap detection result of 1 to the platform door control system 2, which then causes the platform door control system 2 to send a "platform door locked state = 1" signal to the interlocking system 1, causing the train to meet the exit conditions and exit the station. At this time, the interlocking system 1 re-detects that the platform is not in an occupied state and sends an updated platform track occupation state to the platform door control system 2 (at this time, the platform track occupation state = 1). The platform door control system 2 then sends the platform track occupation state of 1 to the gap detection device 3, causing the platform track occupation state of the gap detection device 3 to change from 0 to 1. At this time, the combination of the platform door open / close state and the platform track occupation state is 11, causing the gap detection device 3 to enter the standby mode 71 and repeat steps S1 to S5.

[0152] When a foreign object is present between the train and the platform door, gap detection device 3 sends a gap detection result of 0 to platform door control system 2, preventing the train from meeting exit conditions. At this point, the track remains occupied, and interlocking system 1 detects the updated platform track occupancy status (at this point, platform track occupancy status = 0) and sends this updated status to gap detection device 3 via platform door control system 2, leaving the platform track occupancy status of gap detection device 3 still at 0. At this point, the combination of the platform door open / closed status and the platform track occupancy status is 10, leaving gap detection device 3 in detection mode 74, and repeating steps S5.1 through S5.3.

[0153] When the signal receiving end 31 of the gap detection device 3 is mixed or disconnected (i.e., the signal line receiving the platform door open / closed status or platform track occupied status of the gap detection device 3 is damaged and subject to signal interference), the signals of the platform door open / closed status and the platform track occupied status are affected, causing the combination of the platform door open / closed status and the platform track occupied status to appear as 00 or 01. Because the gap detection device 3 has confirmed that the track is occupied and all platform doors are closed (i.e., the combination of the platform door open / closed status and the platform track occupied status is 10) before the mixed signal occurs, the gap detection device 3 can repeat the detection (i.e., repeat steps S5.1-S5.3) until its gap detection result becomes 1, allowing the train to leave the station.

[0154] Furthermore, when the train fails to leave the station within the preset departure time (such as step S2.1, step S4.1, step S3.1, step S5.1), the gap detection device 3 enters the detection bypass mode 75 (ie, the gap detection device 3 is in abnormal operation). Figure 5 As shown, at this time, the gap detection device 3 is forced to stop sending the gap detection results to the platform door control system 2. By manually observing whether there are foreign objects between the train and the platform door, and closing the bypass switch 4 when there are no foreign objects, the platform door control system 2 can generate a "platform door locked state = 1" signal, thereby enabling the train to meet the exit conditions and exit the station; after that, the bypass switch 4 is opened to enable the gap detection device 3 to resume the state of automatically generating and sending gap detection results.

[0155] Furthermore, when the gap detection device 3 fails (e.g., step S2.2, step S3.2, step S4.2, step S5.2), the gap detection device 3 enters the failure mode 76 (i.e., the gap detection device 3 is in abnormal operation). Figure 6 As shown, at this time, the gap detection device 3 forces its gap detection result to 0, which prevents the train from leaving the station within the preset departure time, thereby causing the gap detection device 3 to send a bypass signal, causing the gap detection device 3 to enter the detection bypass mode 75.

[0156] Furthermore, when the first signal line or the second signal line of the gap detection device 3 is mixed or disconnected, the gap detection device 3 enters the abnormal processing mode 77. Figure 7 The specific steps are as follows:

[0157] In step T1 , the gap detection device 3 forces “gap detection result = 0” (ie, sends a message to the platform door control system 2 indicating that there is a foreign object between the train and the platform door) to prevent the gap detection device 3 from sending erroneous information.

[0158] Step T2, determining whether the train leaves the station within the preset departure time.

[0159] When the train fails to leave the station within the preset departure time, the gap detection device 3 will send a bypass signal to control the gap detection device 3 to enter the detection bypass mode 75.

[0160] When the train leaves the station within the preset departure time, step T3 is executed.

[0161] Step T3 , determining whether the gap detection device 3 itself has any fault (ie, self-test), to prevent the gap detection device 3 from having any fault in the abnormality handling mode 77 .

[0162] When the gap detection device 3 is in the self-checking process and a fault code or a timeout code of 1 occurs (i.e., a self-fault occurs), the gap detection device 3 enters the fault mode 76;

[0163] When the gap detection device 3 is performing self-checking and no fault is found (ie, the fault code and the timeout code are both 0), step T4 is executed.

[0164] Step T4, based on the platform track occupancy status and the platform door opening / closing status of the gap detection device 3, it is determined whether the combination of the platform door opening / closing status and the platform track occupancy status meets the conditions for entering the detection mode 74.

[0165] When the gap detection device 3 believes that the train has not entered the station (at this time all the platform doors are closed, that is, the combination of the platform door opening and closing status and the platform track occupied status is 11), or believes that the platform door is closed and the train has completed the door opening and closing operations (that is, the combination of the platform door opening and closing status and the platform track occupied status is 10), the gap detection device 3 is controlled to enter the detection mode 74, further confirm whether there is a foreign object detection between the train and the platform door, and send the gap detection result to the platform door control system 2, and then send it to the interlocking system 1, and the interlocking system 1 determines whether the train meets the exit conditions.

[0166] When the gap detection device 3 believes that the platform door is not closed (i.e., the platform door opening and closing status is 0), the platform door opening and closing status and the platform track occupancy status are combined to be 00 (it may be that the train has entered the station and opened the door but has not yet closed the door, and the platform door is not closed) or 01 (the signal line of the gap detection device 3 receiving the platform door opening and closing status or the platform track occupancy status is mixed or broken). At this time, even if there is no foreign object between the train and the platform door, it is unsafe for the train to leave the station. Therefore, the gap detection result of the gap detection device 3 is still forced to be 0. At this time, the gap detection device 3 is still in the exception handling mode 77, and steps T1-T4 are repeated.

[0167] The purpose of designing the exception handling mode 77 is to ensure that after all the platform doors are closed, the gap detection device 3 is used to detect whether there are foreign objects on the non-platform side of the platform door, or between the platform door and the train. This can ensure that the train can leave the station as soon as possible after the train doors are opened and closed and all the platform doors are closed, and the gap detection device 3 enters the normal working cycle; it can also prevent the "gap detection result = 1" signal from being erroneously sent when the platform door is not closed, causing the train to leave the station under unsafe conditions (the platform door has not been closed, that is, "platform door opening and closing status = 0"), thereby improving the safety of the control method of the gap detection device 3 described in the present invention.

[0168] When applying the above-mentioned gap detection method, if the first signal line or the second signal line is mixed or disconnected, even if the gap detection device 3 does not directly enter the abnormal processing mode 77, it will enter the detection bypass mode 75 to ensure that the gap detection device 3 will only issue the "gap detection result = 0" signal under the safe condition of "no foreign objects between the train and the platform door", thereby ensuring the safety of the gap detection device 3. For example: for the first preset mode 72, when the gap detection device 3 enters the first preset mode 72 and after the detection mode 74, because the combination of the platform door open / closed status and the platform track occupied status received is 10; if the second signal line (the signal line for the gap detection device 3 to receive the platform track occupied status) is mixed or disconnected at this time, the gap detection device 3 will directly enter the abnormal processing mode 77. When the first signal line (the signal line that the gap detection device 3 receives the platform door opening and closing status) is mixed, regardless of whether the platform door is open or closed, the combination of the platform door opening and closing status and the platform track occupancy status is 10; but after the actual train enters the station, the door opens and the platform door is also opened, the combination of the platform door opening and closing status and the platform track occupancy status remains at 10 (and if the gap detection device 3 is working normally, it should be 00), and remains in the first preset mode 72; after the train door closes and the platform door is closed, the platform door opening and closing status and the platform track occupancy status remain at 10 (and if the gap detection device 3 is working normally, it should become 10 again), and remain in the first preset mode 72. At this time, the gap detection device 3 has not experienced the second preset mode 73, so it is impossible to enter the detection mode 74, that is, the gap detection device 3 is in an infinite loop in the first preset mode 72, and will eventually cause the gap detection device 3 to send a bypass signal due to exceeding the preset departure time, thereby causing the gap detection device 3 to enter the detection bypass mode 75.

[0169] In summary, the gap detection system described in the present invention controls the start or stop of the gap detection device according to the combined changes of the platform door opening and closing status and the platform rail occupancy status, thereby saving the operation time required to control the start / stop of the gap detection device; and the gap detection method improves the safety of the gap detection method by performing self-inspection and signal inspection during each signal reception process of the gap detection device, and causing the gap detection device to enter an abnormal processing mode, a bypass mode, and a fault mode when the gap detection device cannot work normally.

[0170] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. After reading the above description, various modifications and substitutions of the present invention will become apparent to those skilled in the art. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A gap detection method, characterized in that: include: The interlocking system obtains platform rail occupancy status information and sends it to the platform door control system. The platform door control system obtains platform door opening and closing status information. The platform door control system sends the platform rail occupancy status information and the platform door opening and closing status information to the gap detection device. The gap detection device performs a gap detection operation according to the platform rail occupancy status information and the platform door opening and closing status information, and sends the gap detection result to the platform door control system; The platform door control system calculates the gap detection results to obtain the platform door locking status information and sends it to the interlocking system.

2. The gap detection method according to claim 1, characterized in that: When the platform track occupancy status information changes from "unoccupied" to "occupied", and the platform door opening and closing status information changes from "closed" to "open" and then to "closed", the gap detection device enters the detection mode and starts to detect whether there is a foreign object between the platform door and the train.

3. The gap detection method according to claim 2, characterized in that: After the gap detection device is in the gap detection mode, the platform rail occupancy status information changes from "occupied" to "unoccupied", and the platform door opening and closing status information remains "closed", the gap detection device enters the standby mode and stops detecting.

4. The gap detection method according to claim 3, characterized in that: After the gap detection device enters the standby mode and before entering the detection mode, the platform rail occupancy status information changes from "unoccupied" to "occupied", and the platform door opening and closing status information remains "closed", the gap detection device enters the first preset mode; After the gap detection device enters the first preset mode, the platform door opening and closing status information changes from "closed" to "open", and the platform rail occupancy status information remains "occupied", then the gap detection device enters the second preset mode.

5. The gap detection method according to claim 4, characterized in that: When the gap detection device is in the second preset mode, the gap detection result is preset to "there is a foreign object"; when the gap detection device enters the detection mode from the second preset mode, the gap detection device generates an actual gap detection result based on whether there is a foreign object between the platform door and the train.

6. The gap detection method according to claim 1, characterized in that: When the gap detection device is powered on, the gap detection device enters a standby mode and does not perform detection.

7. The gap detection method according to claim 1, characterized in that: If the train's stop time at the platform is greater than or equal to the preset departure time, the gap detection device enters the detection bypass mode, and manual operation causes the gap detection device to send the gap detection result of "no foreign objects" to the platform door control system; Among them, the preset departure time is the maximum time that the gap detection equipment allows the train to stop at the platform.

8. The gap detection method according to claim 7, characterized in that: The gap detection device performs a self-check in real time, and when the gap detection device detects a fault, the gap detection device enters a fault mode; When the gap detection device is in fault mode, the gap detection device forcibly sets the initial value of its gap detection result to "foreign object". If the train's stop time at the platform is greater than or equal to the preset departure time, the gap detection device enters the detection bypass mode.

9. The gap detection method according to claim 8, characterized in that: When the gap detection device cannot maintain the standby mode and cannot enter the first preset mode, or when the gap detection device cannot maintain the first preset mode and cannot enter the second preset mode, or when the gap detection device cannot maintain the second preset mode and cannot enter the detection mode, the gap detection device enters the abnormality handling mode; When the gap detection device is in the exception handling mode, the initial value of its gap detection result is forcibly set to "foreign object"; when the platform door opening and closing status information of the gap detection device is "closed", the gap detection device enters the detection mode; when the platform door opening and closing status information of the gap detection device is "open", the gap detection device continues to maintain the exception handling mode. If the train's stop time at the platform is greater than or equal to the preset departure time, the gap detection device enters the detection bypass mode.

10. The gap detection method according to claim 6, characterized in that: Methods for powering on the gap detection device and entering standby mode include: After the gap detection device is powered on, it enters a power-on self-test to determine whether the hardware of the gap detection device is faulty; When the gap detection device detects a hardware fault during power-on self-test, it will enter a power-on self-test dead loop and issue a fault alarm. When the gap detection device is powered on and self-tested and no hardware fault is found, the gap detection device will enter standby mode.

11. A gap detection system, characterized in that: A method for implementing the gap detection method according to any one of claims 1 to 10, comprising: Interlocking system, collecting platform and track occupancy status information; The platform door control system collects information on the opening and closing status of the platform doors; the platform door control system transmits signals in a two-way manner with the interlocking system, receives information on the occupancy status of the platform rails from the interlocking system, and sends information on the locking status of the platform doors to the interlocking system to control train departures; The gap detection device transmits two-way signals with the platform door control system, receives the platform door opening and closing status information and platform track occupancy status information sent by the platform door control system, and sends the gap detection results to the platform door control system; Among them, after the platform door control system receives the gap detection result of "no foreign objects", it generates platform door locking status information and sends it to the interlocking system, which controls the train to leave the station.

12. The gap detection system according to claim 11, characterized in that: The gap detection device comprises: The signal receiving end is connected to the platform door control system via a first signal line to receive platform door opening and closing status information sent by the platform door control system; and is connected to the platform door control system via a second signal line to receive platform track occupancy status information sent by the platform door control system; Signal output terminal, connected to the platform door control system to send the gap detection results generated by the gap detection equipment; The detection end includes: a detection component for detecting foreign objects, the detection component generates a monitoring output result reflecting whether a foreign object is detected, and the monitoring output result serves as a basis for the gap detection device to generate a gap detection result.

13. The gap detection system according to claim 12, characterized in that: The gap detection device further comprises an alarm terminal, which is used for alarming a fault during the power-on self-test process of the gap detection device.

14. The gap detection system according to claim 11, characterized in that: Also includes: The bypass switch has two ends connected to the platform door control system and the gap detection device respectively. By manually operating the bypass switch, the platform door control system receives the gap detection result of "no foreign matter".

15. The gap detection system according to claim 11, characterized in that: Also includes: A forced switch is connected to the gap detection device, and manual operation of the forced switch causes the gap detection device to start detecting whether there is a foreign object between the platform door and the train.

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