Platform door system safety circuit detection method

Abstract

The invention provides a platform door system safety circuit detection method, which is applied to a door control unit of each platform door, and the platform door is a sliding door or an emergency door, and comprises the following steps: when the platform door is detected to be in a closed state, the door control unit is started; reading an input state S1 and an output state S2 of a safety circuit of the platform door and a front-stage safety circuit state S3 sent by a front-stage platform door; according to the input state S1, the output state S2 and the preceding-stage safety circuit state S3, whether the platform door has a safety circuit fault or not is judged; and searching a processing strategy matched with the judgment result in a preset processing strategy table and executing the processing strategy.

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 safety circuit detection method. Background Art

[0002] The platform door safety circuit is also called the platform door closing and locking circuit, which is composed of hard wires in series with each detection switch of each sliding door and emergency door. When all the sliding doors of the platform are completely closed and locked, the detection switches of all sliding doors and emergency doors are connected, the safety circuit is connected, and the subway train can enter the station or depart safely. If any sliding door or emergency door is not completely closed and locked, the corresponding detection switch is open, the safety circuit is disconnected, and the signal system cannot detect the safety circuit signal of the shield door system. At this time, the train that has stopped at the station will not be able to depart, and the train that is about to enter or exit the station will be urgently stopped, and the station staff needs to operate the "interlock release" of the PSL to receive and dispatch the train.

[0003] At present, the detection switches of subway platform door equipment are mostly composed of mechanical travel switches. The door control unit (door control unit) determines whether the sliding door is closed normally by detecting the status of the switch. The switches used for safety circuit detection and sliding door status detection are two different sets of contacts of the same travel switch. If there is a problem with the safety circuit detection contacts, the other set of contacts can work normally. At this time, the platform door system cannot determine which sliding door failure caused the safety circuit to be blocked, and the system cannot give any fault-related prompts. In this case, the safety circuit blockage is a safety circuit failure. Most of the existing platform door systems already have a safety circuit detection function, but in actual work, it is found that the existing safety circuit detection function has the following problems: 1. It is impossible to effectively determine whether the safety loop cable is normal. As the subway continues to operate for a longer period of time, the probability of abnormalities in the safety loop cable itself and the interface will increase. Once the safety loop cable is abnormal, the safety loop fault cannot be handled in a timely manner.

[0004] 2. The detection circuit detects the abnormal state of the safety circuit. When an abnormality occurs in the safety circuit, if the detection circuit is damaged, the abnormality of the safety circuit cannot be detected.

[0005] In view of the above-mentioned technical problems, it is very necessary to provide a safety circuit detection method that can detect the status of the safety circuit cable and can actively alarm when an abnormality occurs in the detection circuit.

[0006] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0007] Based on this, it is necessary to provide a platform door system safety circuit detection method that can effectively detect the status of the safety circuit cable and actively alarm when an abnormality occurs in the detection circuit to address the above technical problems, thereby improving the efficiency of platform door system safety circuit fault handling and reducing the impact of faults on driving.

[0008] In order to achieve the above object, the first aspect of the present invention provides a platform door system safety circuit detection method, which is applied to the door control unit of each platform door, and the platform door is a sliding door or an emergency door, comprising the following steps: When the platform door of the current track is detected to be in the closed state, the input state S1, output state S2 of the safety circuit of the platform door of the current track and the state S3 of the previous safety circuit issued by the previous platform door are read; Determine whether the safety circuit of the platform door has a fault according to the input status S1, output status S2 and the previous safety circuit status S3; Search the preset processing strategy table for a processing strategy that matches the judgment result and execute it.

[0009] In one embodiment, judging whether a safety circuit failure occurs in the platform door according to the input state S1, the output state S2 and the previous safety circuit state S3 includes: When S1, S2, and S3 are all in normal status, it is determined that the status of the platform door safety circuit is normal; When S1 and S2 are normal, S3 is abnormal, or S2 is normal, S1 and S3 are abnormal, or S2 and S3 are normal, S1 is abnormal, it is determined that the safety circuit of the platform door is normal, and the door control unit of the platform door is faulty or the door control unit of the previous platform door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions; When S1 and S3 are normal and S2 is abnormal, or S1 is normal and S2 and S3 are abnormal, it is determined that the safety circuit of the platform door is faulty; When S3 is normal and S1 and S2 are abnormal, it is determined that the safety circuit between the current platform door and the previous platform door is disconnected.

[0010] In one embodiment, the preset processing strategy table includes: When the safety circuit status of the platform door is normal, the normal status of the safety circuit is sent to the door control unit of the subsequent platform door; When the safety circuit of the platform door is in normal state, and the door control unit of the platform door is faulty or the door control unit of the previous sliding door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions, the safety circuit status normal signal is sent to the next platform door and the fault information is sent to the platform door system software; When a safety circuit fault occurs in the platform door, the control door status indicator will give an alarm and send fault information to the platform door system software. When S2 returns to normal after the platform door is bypassed by the bypass device, a safety circuit status normal signal will be sent to the next platform door and the status information of the bypass device will be sent to the platform door system software. When the wiring is broken between the safety circuit of the current platform door and the previous platform door, the control door status indicator light will alarm and send fault information to the platform door system software.

[0011] In order to achieve the above object, the second aspect of the present invention provides a platform door system safety circuit detection device, which is applied to the door control unit of each platform door, wherein the platform door is a sliding door or an emergency door. The device includes a safety loop state detection module, a safety loop state feedback module, a DOI control module, a state feedback module and a bypass device state detection module; The safety loop state feedback module includes a safety loop state feedback unit and a safety loop state receiving unit, wherein the safety loop state receiving unit is used to receive a safety loop state signal sent by a gate control unit of a previous platform door; the safety loop state feedback unit is used to send a safety loop state signal to a gate control unit of a subsequent platform door; The safety circuit state detection module is used to detect the input state S1 and output state S2 of the safety circuit of the platform door of the current track after the platform door of the current track is closed, and judge whether the safety circuit of the platform door of the current track has a fault according to the input state S1 and output state S2 of the safety circuit of the platform door of the current track and the state S3 of the previous safety circuit issued by the previous platform door, and search the preset processing strategy table for a processing strategy matching the judgment result for execution; The DOI control module is connected to the door status indicator light to control the door status indicator light to alarm, reminding station personnel that the platform door has an abnormality and needs to take emergency measures in time; The state feedback module is connected to the safety circuit state detection module and is used to upload the safety circuit information of the platform door to the central control cabinet; The bypass device is used to bypass the platform door of this track.

[0012] A third aspect of the present invention provides a platform door system safety circuit detection system, comprising a plurality of sliding doors and a sliding safety circuit detection device, a sliding door status indicator light and a local control box arranged corresponding to each sliding door; the safety circuits of the plurality of sliding doors are connected in series to form a platform door system safety circuit; Among them, each sliding safety circuit detection device is the platform door system safety circuit detection device described in the second aspect.

[0013] Furthermore, the system also includes a plurality of emergency doors and an emergency safety circuit detection device, an emergency door status indicator light and an emergency door bypass switch corresponding to each emergency door; the safety circuit of each emergency door is connected in series with the safety circuit of the preceding sliding door and the safety circuit of the succeeding sliding door to form a platform door system safety circuit; Among them, each emergency safety circuit detection device is the platform door system safety circuit detection device described in the second aspect.

[0014] The beneficial effects of the present invention are: The present invention relates to a platform door system safety circuit detection method. By setting a safety circuit state detection module, a safety circuit state feedback module, a DOI control module, a state feedback module and a bypass device state detection state detection module, when the platform door of the current track is detected to be in a closed state, the input and output of the safety circuit of the platform door of the current track and the state of the previous safety circuit sent by the previous platform door are read, and whether the platform door of the current track has a safety circuit related fault is judged according to the read state information; when the safety circuit fault, wiring fault and internal detection circuit abnormality of the platform door of the current track are detected, a corresponding alarm is made; when the safety circuit is detected to be normal, the normal state of the safety circuit is sent to the door control unit of the subsequent platform door; when a safety circuit fault occurs, the station personnel can restore the safety circuit state after bypassing the corresponding sliding door through the local control box according to the alarm prompt, and the train can leave the station normally. The present invention can effectively detect the state of the safety circuit cable and can actively alarm when the detection circuit is abnormal, which can effectively improve the efficiency of handling the safety circuit fault of the platform door system and reduce the influence of the fault on driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the design principle of the safety circuit of the present invention; Figure 2 It is a flow chart of a platform door system safety circuit detection method of the present invention; Figure 3 It is the detection principle diagram of the present invention.

[0016] Figure 4 (a) is a schematic diagram of a single cut of the safety circuit.

[0017] Figure 4 (b) is a schematic diagram of double cut of the safety circuit.

[0018] Figure 5 It is a structural schematic diagram of the platform door system safety circuit detection device of the present invention.

[0019] Figure 6 It is a structural schematic diagram of the sliding safety circuit detection device of the present invention.

[0020] Figure 7 It is a structural schematic diagram of the emergency safety circuit detection device of the present invention. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described in detail below through specific implementation methods.

[0022] For ease of understanding, the interactive parties and / or terms and / or custom words involved in the present invention are first described in conjunction with the technical solution of the present invention: Door Control Unit, DCU for short, is a control device for controlling the door machine locally.

[0023] Local control box, LCB for short, is a control device for locally controlling a single sliding door.

[0024] Central control panel, platform screen doors centralinterface panel, referred to as PSC, is the platform screen doors control center of a station, including logic control unit, monitoring unit and its various interfaces.

[0025] Door Open Indicator (light alarm), referred to as DOI, indicates the different operating and fault conditions of the sliding door, end door and adjacent emergency door.

[0026] Safety circuit, design schematic diagram as follows Figure 1 As shown in the figure, the circuit is composed of a large number of travel switches, hard wires, terminals and other parts (the number of parts is positively correlated with the number of platform doors on each side). The reliability of this design is affected by environmental factors and equipment design factors. The door control unit (DCU) only monitors a pair of contacts of the travel switch to indirectly monitor the safety circuit. Other components in the safety circuit can only be monitored through the terminal safety circuit relay.

[0027] Example 1 This embodiment provides a platform door system safety circuit detection method, which is applied to the door control unit of each platform door, where the platform door is a sliding door or an emergency door, such as Figure 2 As shown, the following steps are included: When the platform door of the current track is detected to be in the closed state, the input state S1, output state S2 of the safety circuit of the platform door of the current track and the state S3 of the previous safety circuit issued by the previous platform door are read; Determine whether the safety circuit of the platform door has a fault according to the input status S1, output status S2 and the previous safety circuit status S3; Specifically, judging whether a safety circuit failure occurs in the platform door according to the input state S1, the output state S2 and the previous safety circuit state S3 includes: When S1, S2, and S3 are all in normal status, it is determined that the status of the platform door safety circuit is normal; When S1 and S2 are normal, S3 is abnormal, or S2 is normal, S1 and S3 are abnormal, or S2 and S3 are normal, S1 is abnormal, it is determined that the safety circuit of the platform door is normal, and the door control unit of the platform door is faulty or the door control unit of the previous platform door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions; When S1 and S3 are normal and S2 is abnormal, or S1 is normal and S2 and S3 are abnormal, it is determined that the safety circuit of the platform door is faulty; When S3 is normal and S1 and S2 are abnormal, it is determined that there is a wire break in the safety circuit between the current platform door and the previous platform door.

[0028] Finally, the preset processing strategy table is searched for a processing strategy that matches the judgment result and executed.

[0029] In one embodiment, the preset processing strategy table includes: When the safety circuit status of the platform door is normal, the normal status of the safety circuit is sent to the door control unit of the subsequent platform door; When the safety circuit of the platform door is in normal state, and the door control unit of the platform door is faulty or the door control unit of the previous sliding door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions, the safety circuit status normal signal is sent to the next platform door and the fault information is sent to the platform door system software; When a safety circuit fault occurs in the platform door, the control door status indicator will give an alarm and send fault information to the platform door system software. When S2 returns to normal after the platform door is bypassed by the bypass device, a safety circuit status normal signal will be sent to the next platform door and the status information of the bypass device will be sent to the platform door system software. When the wiring is broken between the safety circuit of the current platform door and the previous platform door, the control door status indicator light will alarm and send fault information to the platform door system software.

[0030] The specific corresponding relationships are as follows: S1 S2 S3 Judgment results Disposal method normal normal normal The safety circuit of the platform door of this track is in normal condition Send a safety circuit status normal signal to the next-level platform door normal normal abnormal The safety circuit of the platform door of this track is in normal condition The DCU of the platform door of this track is faulty or the DCU of the previous platform door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions. Normally send the safety circuit status normal signal to the downstream platform door and send fault information to the platform door system software normal abnormal normal There is a safety circuit failure on the platform door of this track The control door status indicator lights up and sends fault information to the platform door system software. When S2 returns to normal after bypassing the platform door of this channel through the bypass device, it sends a safety circuit status normal signal to the next platform door and sends the bypass device status information to the platform door system software. normal abnormal abnormal There is a safety circuit failure on the platform door of this track The control door status indicator lights up and sends fault information to the platform door system software. When S2 returns to normal after bypassing the platform door of this channel through the bypass device, it sends a safety circuit status normal signal to the next platform door and sends the bypass device status information to the platform door system software. abnormal normal normal There is a fault in the DCU of the platform door of this track. On-site equipment meets normal operating conditions Normally send the safety circuit status normal signal to the downstream platform door and send fault information to the platform door system software abnormal normal abnormal The safety circuit of the platform door of this track is in normal condition The DCU of the platform door of this track is faulty or the DCU of the previous platform door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions. Normally send the safety circuit status normal signal to the downstream platform door and send fault information to the platform door system software abnormal abnormal normal The wiring of the safety circuit between the platform door and the previous platform door is disconnected. Control the door status indicator to alarm and send fault information to the platform door system software Taking the platform door as a sliding door as an example, the specific detection principle is as follows Figure 3 As shown, the sliding door 1 closest to the equipment room is determined to be the first sliding door, and the sliding door S3 is in a fixed trigger state. The default safety circuit output from the platform door control room to the sliding door is in a normal state. Taking sliding door 2 as an example, the MCU2 output by U5 is the input state S1 of the safety circuit of this sliding door, and the MCU2 output by U5 is the input state S1 of the safety circuit of this sliding door. Then, the previous safety circuit state S3 issued by the previous sliding door can be added to detect the safety circuit.

[0031] When sliding door 2 receives the sliding door fully closed and locked status sent by the previous stage, it is considered that the previous stage safety circuit status is normal; if sliding door 2 only receives the safety circuit status and does not receive the sliding door fully closed and locked status sent by the previous stage, it is determined that the fault is two DCUs or wiring, which does not affect the sending of the sliding door fully closed and locked status to the next stage.

[0032] When sliding door 2 receives the signal from the previous stage that the sliding door is fully closed and locked, it considers that the previous stage safety circuit is in normal state. However, when its output end does not detect that the sliding door is fully closed and locked, it determines that there is a safety circuit fault in itself, reports the safety circuit fault, and operates the LCB to bypass the safety circuit.

[0033] When the sliding door 2 determines that it is in a closed and locked state, it sends a message indicating that the sliding door is fully closed and locked to the subsequent stage.

[0034] Sliding door 2 did not receive the sliding door fully closed and locked status sent by the previous stage, but when the safety circuit voltage was detected, it was determined that the fault did not affect the safety circuit, and the fault point was the DCU OR connection line of this sliding door and the previous sliding door.

[0035] When sliding door 2 receives the signal from the previous stage that the sliding door is fully closed and locked, but fails to detect the voltage of the safety circuit, it is determined that the fault point of the safety circuit is the connection line between the current sliding door and the previous sliding door.

[0036] Furthermore, it can be understood that the total safety circuit formed by connecting the safety circuits of multiple sliding doors in series needs to be connected to the central control cabinet PSC in the equipment room. The power supply and feedback ends of the safety circuit of the PSC are both equipped with voltage status detection. When there is no voltage at the detection end, it is determined that the equipment room equipment OR wiring is faulty and the platform operation interlock can be released.

[0037] Specifically, according to the two control methods of the safety circuit, the detection principle can be equivalent to that shown in Figure 4 (a) and Figure 4 (b). When the double-cut control method is adopted, the two safety circuits must be bypassed at the same time when the LCB is bypassed; when the single-cut control method is adopted, the common end needs to use a loop line to improve its reliability. The loop line is provided with a switch to facilitate the judgment of whether there is a disconnection in the common end.

[0038] It can be understood that when a safety circuit disconnection fault occurs, the platform door system software further determines the safety circuit fault point based on whether the safety circuit status is restored after bypassing. If the safety circuit is not restored, the fault occurs from the output end of the safety circuit of the previous platform door DCU to the input end of the platform door terminal block; if the safety circuit status is restored, the fault occurs between the sliding door terminal block and its own DCU.

[0039] Furthermore, after receiving the whole-side door opening command, the reading of the input state S1, the output state S2 of the platform door safety circuit of the current track and the previous safety circuit state S3 issued by the previous platform door is canceled.

[0040] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0041] Example 2 Based on the same inventive concept, the embodiment of the present application also provides a platform door system safety circuit detection device for implementing the platform door system safety circuit detection method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more platform door system safety circuit detection device embodiments provided below can refer to the limitations of the platform door system safety circuit detection method above, and will not be repeated here.

[0042] Specifically, the platform door system safety circuit detection device is applied to the door control unit of each platform door, and the platform door is a sliding door or an emergency door, such as Figure 5 As shown, it includes a safety circuit state detection module, a safety circuit state feedback module, a DOI control module, a state feedback module, a platform door control module and a bypass device state detection module; The safety loop state feedback module includes a safety loop state feedback unit and a safety loop state receiving unit, wherein the safety loop state receiving unit is used to receive a safety loop state signal sent by a gate control unit of a previous platform door; the safety loop state feedback unit is used to send a safety loop state signal to a gate control unit of a subsequent platform door; The safety circuit state detection module is used to detect the input state S1 and output state S2 of the safety circuit of the platform door of the current track after the platform door of the current track is closed, and judge whether the safety circuit of the platform door of the current track has a fault according to the input state S1 and output state S2 of the safety circuit of the platform door of the current track and the state S3 of the previous safety circuit issued by the previous platform door, and search the preset processing strategy table for a processing strategy matching the judgment result for execution; The DOI control module is connected to the door status indicator light to control the door status indicator light to alarm, reminding station personnel that the platform door has an abnormality and needs to take emergency measures in time; The state feedback module is connected to the safety circuit state detection module and is used to upload the safety circuit information of the platform door to the central control cabinet; The bypass device status detection module is used to detect the bypass device that bypasses the platform door of this track.

[0043] It should be noted that when the platform door system safety circuit detection device is applied to the door control unit of each station sliding door, Figure 5 As shown, in addition to the safety loop status detection module, the safety loop status feedback module, the DOI control module, the status feedback module, and the bypass device status detection module, it also includes a platform door control module, which is applied to the sliding door unit to control the opening and closing of the sliding door.

[0044] Specifically, the working principle of the platform door system safety circuit detection device is as follows: When it is detected that the platform door is in the closed state, the input state S1, output state S2 of the platform door safety circuit and the previous safety circuit state S3 issued by the previous platform door are read.

[0045] When S1, S2, and S3 are all in normal status, it is determined that the safety circuit status of the platform door is normal, and a safety circuit status normal signal is sent to the subsequent sliding door.

[0046] When S1 and S2 are normal and S3 is abnormal, or S2 is normal and S1 and S3 are abnormal, or S2 and S3 are normal and S1 is abnormal, it is determined that the safety circuit status of this platform door is normal, and there is a fault in the door control unit of this platform door or the door control unit of the previous platform door is faulty or the S3 wiring is broken, but the on-site equipment meets the normal operating conditions, and normally sends the safety circuit status normal signal to the subsequent sliding door and sends fault information to the platform door system software.

[0047] When S1 and S3 are normal and S2 is abnormal, it is judged that there is a safety circuit fault in the platform door. The door status indicator light is controlled to alarm and send fault information to the platform door system software. When S2 returns to normal after bypassing the platform door through the bypass device, a safety circuit status normal signal is sent to the subsequent platform door and the status information of the bypass device is sent to the platform door system software.

[0048] When S1 is normal and S2 and S3 are abnormal, it is judged that there is a safety circuit fault in the platform door. The door status indicator light is controlled to alarm and send fault information to the platform door system software. When S2 returns to normal after bypassing the platform door through the bypass device, a safety circuit status normal signal is sent to the subsequent platform door and the status information of the bypass device is sent to the platform door system software.

[0049] When S2 and S3 are normal and S1 is abnormal, it is judged that there is a safety circuit fault in the platform door of this track, but the on-site equipment meets the normal operating conditions, and normally sends a normal safety circuit status signal to the subsequent platform door and sends fault information to the platform door system software.

[0050] When S2 is normal and S1 and S3 are abnormal, it is judged that the status of the safety circuit of the platform door of this track is normal, but the DCU of the platform door of this track is faulty or the DCU of the previous platform door of this track is faulty or the S3 wiring is broken, but the on-site equipment meets the normal operating conditions, and the safety circuit status normal signal is sent to the next platform door of this track and fault information is sent to the platform door system software.

[0051] When S3 is normal and S1 and S2 are abnormal, the wiring of the safety circuit between the current platform door and the previous platform door is broken, the control door status indicator light will alarm and send fault information to the platform door system software.

[0052] After receiving the whole-side door opening command, the detection of S1, S2 and S3 states is canceled.

[0053] Example 3 This embodiment provides a platform door system safety circuit detection system, including multiple sliding doors and a sliding safety circuit detection device, a sliding door status indicator light and a local control box corresponding to each sliding door; the safety circuits of the multiple sliding doors are connected in series to form a platform door system safety circuit; Among them, each sliding safety circuit detection device is the platform door system safety circuit detection device described in Example 2.

[0054] Specifically, the structural diagram of the sliding safety circuit detection device is as follows: Figure 6 It can be understood that in the sliding safety circuit detection device, the bypass device corresponding to the sliding door is the local control box LCB, the platform door control module is the sliding door control module, and generally the sliding safety circuit detection device is located in the door control unit DCU.

[0055] It can be understood that the lower level safety circuit detection device of the sliding safety circuit detection device can be a sliding safety circuit detection device or an emergency safety circuit detection device, which is specifically set according to the relationship between the emergency door and the sliding door. Similarly, the upper level safety circuit detection device of the sliding safety circuit detection device can be a sliding safety circuit detection device or an emergency safety circuit detection device, which is specifically set according to the relationship between the emergency door and the sliding door.

[0056] Furthermore, the platform door system safety circuit detection system is also provided with a central control panel cabinet safety circuit input status detection module and a central control panel cabinet safety circuit output status detection module, which are used to respectively detect the input status and output status of the central control panel cabinet safety circuit, so that the platform door system software can judge whether the wiring between the two is normal according to the output status of the central control panel safety circuit and the safety circuit information of the first sliding door, and judge whether the wiring between the two is normal according to the input status of the central control panel cabinet safety circuit and the safety circuit information of the end sliding door.

[0057] It can be understood that the total safety circuit formed by connecting the safety circuits of multiple sliding doors in series needs to be connected to the central control cabinet PSC in the equipment room. The power supply and feedback ends of the safety circuit of the PSC are both equipped with voltage status detection. When there is no voltage at the detection end, it is determined that the equipment room equipment OR wiring is faulty, and the platform operation interlock can be released.

[0058] Furthermore, when a safety circuit disconnection fault occurs, the platform door system software further determines the safety circuit fault point based on whether the sliding door safety circuit status is restored after the local control box is bypassed; If the sliding door safety circuit is not restored, it is judged that the fault occurs from the output end of the safety circuit of the previous sliding door control unit to the input end of the sliding door terminal block; If the sliding door safety circuit is restored, the fault is judged to be between the sliding door terminal block and the door control unit. Example 4 The difference between this embodiment and embodiment 3 is that it further includes a plurality of emergency doors and an emergency safety circuit detection device, an emergency door status indicator light and an emergency door bypass switch provided for each emergency door; the safety circuit of each emergency door is connected in series with the safety circuit of the preceding sliding door and the safety circuit of the succeeding sliding door to form a platform door system safety circuit; Among them, each emergency safety circuit detection device is the platform door system safety circuit detection device described in Example 2.

[0059] Specifically, the structural diagram of the emergency safety circuit detection device is as follows: Figure 7 It can be understood that in the emergency safety circuit detection device, the bypass device corresponding to the emergency door is the emergency door bypass switch.

[0060] It can be understood that the lower level safety circuit detection device of the emergency safety circuit detection device can be a sliding safety circuit detection device or an emergency safety circuit detection device; similarly, the upper level safety circuit detection device of the emergency safety circuit detection device can be a sliding safety circuit detection device or an emergency safety circuit detection device, which is specifically set according to the relationship between the emergency door and the sliding door.

[0061] 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 platform door system safety circuit detection method, applied to the door control unit of each platform door, the platform door is a sliding door or an emergency door, characterized in that: The following steps are involved: When the platform door of the current track is detected to be in the closed state, the input state S1, output state S2 of the safety circuit of the platform door of the current track and the state S3 of the previous safety circuit issued by the previous platform door are read; Determine whether the safety circuit of the platform door has a fault according to the input status S1, output status S2 and the previous safety circuit status S3; Search the preset processing strategy table for a processing strategy that matches the judgment result and execute it.

2. A platform door system safety circuit detection method according to claim 1, characterized in that: According to the input status S1, output status S2 and the previous safety circuit status S3, it is judged whether the platform door of this track has a safety circuit fault, including: When S1, S2, and S3 are all in normal status, it is determined that the status of the platform door safety circuit is normal; When S1 and S2 are normal, S3 is abnormal, or S2 is normal, S1 and S3 are abnormal, or S2 and S3 are normal, S1 is abnormal, it is determined that the safety circuit of the platform door is normal, and the door control unit of the platform door is faulty or the door control unit of the previous platform door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions; When S1 and S3 are normal and S2 is abnormal, or S1 is normal and S2 and S3 are abnormal, it is determined that the safety circuit of the platform door is faulty; When S3 is normal and S1 and S2 are abnormal, it is determined that there is a wire break in the safety circuit between the current platform door and the previous platform door.

3. A platform door system safety circuit detection method according to claim 1 or 2, characterized in that: The preset processing strategy table includes: When the safety circuit status of the platform door is normal, the normal status of the safety circuit is sent to the door control unit of the subsequent platform door; When the safety circuit of the platform door is in normal state, and the door control unit of the platform door is faulty or the door control unit of the previous sliding door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions, the safety circuit status normal signal is sent to the next platform door and the fault information is sent to the platform door system software; When a safety circuit fault occurs in the platform door, the control door status indicator will give an alarm and send fault information to the platform door system software. When S2 returns to normal after the platform door is bypassed by the bypass device, a safety circuit status normal signal will be sent to the next platform door and the status information of the bypass device will be sent to the platform door system software. When the wiring is broken between the safety circuit of the current platform door and the previous platform door, the control door status indicator light will alarm and send fault information to the platform door system software.

4. A platform door system safety circuit detection method according to claim 3, characterized in that: After receiving the whole-side door opening command, the reading of the input state S1, output state S2 of the platform door safety circuit of this track and the previous safety circuit state S3 issued by the previous platform door is canceled.

5. A platform door system safety circuit detection device, applied to the door control unit of each platform door, the platform door is a sliding door or an emergency door, characterized in that: It includes a safety circuit state detection module, a safety circuit state feedback module, a DOI control module, a state feedback module and a bypass device state detection module; The safety loop state feedback module includes a safety loop state feedback unit and a safety loop state receiving unit, wherein the safety loop state receiving unit is used to receive a safety loop state signal sent by a gate control unit of a previous platform door; the safety loop state feedback unit is used to send a safety loop state signal to a gate control unit of a subsequent platform door; The safety circuit state detection module is used to detect the input state S1 and output state S2 of the safety circuit of the platform door of the current track after the platform door of the current track is closed, and judge whether the safety circuit of the platform door of the current track has a fault according to the input state S1 and output state S2 of the safety circuit of the platform door of the current track and the state S3 of the previous safety circuit issued by the previous platform door, and search the preset processing strategy table for a processing strategy matching the judgment result for execution; The DOI control module is connected to the door status indicator light to control the door status indicator light to alarm, reminding station personnel that the platform door has an abnormality and needs to take emergency measures in time; The state feedback module is connected to the safety circuit state detection module and is used to upload the safety circuit information of the platform door to the central control cabinet; The bypass device status detection module is used to detect the bypass device that bypasses the platform door of this track.

6. A platform door system safety circuit detection device according to claim 5, characterized in that: The method of judging whether a safety circuit failure occurs in the platform door according to the input state S1 and the output state S2 of the safety circuit of the platform door and the state S3 of the previous safety circuit issued by the previous platform door includes: When S1, S2, and S3 are all in normal status, it is determined that the status of the platform door safety circuit is normal; When S1 and S2 are normal, S3 is abnormal, or S2 is normal, S1 and S3 are abnormal, or S2 and S3 are normal, S1 is abnormal, it is determined that the safety circuit of the platform door is normal, and the door control unit of the platform door is faulty or the door control unit of the previous platform door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions; When S1 and S3 are normal and S2 is abnormal, or S1 is normal and S2 and S3 are abnormal, it is determined that the safety circuit of the platform door is faulty; When S3 is normal and S1 and S2 are abnormal, it is determined that there is a wire break in the safety circuit between the current platform door and the previous platform door.

7. A platform door system safety circuit detection device according to claim 5 or 6, characterized in that: The preset processing strategy table includes: When the safety circuit status of the platform door is normal, the normal status of the safety circuit is sent to the door control unit of the subsequent platform door; When the safety circuit of the platform door is in normal state, and the door control unit of the platform door is faulty or the door control unit of the previous sliding door is faulty or the S3 wiring is disconnected, but the on-site equipment meets the normal operating conditions, the safety circuit status normal signal is sent to the next platform door and the fault information is sent to the platform door system software; When a safety circuit fault occurs in the platform door, the control door status indicator will give an alarm and send fault information to the platform door system software. When S2 returns to normal after the platform door is bypassed by the bypass device, a safety circuit status normal signal will be sent to the next platform door and the status information of the bypass device will be sent to the platform door system software. When the wiring is broken between the safety circuit of the current platform door and the previous platform door, the control door status indicator light will alarm and send fault information to the platform door system software.

8. A platform door system safety circuit detection system, characterized in that: It includes a plurality of sliding doors and a sliding safety circuit detection device, a sliding door status indicator light and a local control box corresponding to each sliding door; the safety circuits of the plurality of sliding doors are connected in series to form a platform door system safety circuit; Among them, each sliding safety circuit detection device is a platform door system safety circuit detection device as described in any one of claims 5-7.

9. A platform door system safety circuit detection system according to claim 8, characterized in that: It also includes multiple emergency doors and an emergency safety circuit detection device, an emergency door status indicator light, and an emergency door bypass switch corresponding to each emergency door; the safety circuit of each emergency door is connected in series with the safety circuit of the preceding sliding door and the safety circuit of the succeeding sliding door to form a safety circuit of the platform door system; Among them, each emergency safety circuit detection device is a platform door system safety circuit detection device as described in any one of claims 5-7.

10. A platform door system safety circuit detection system according to claim 8 or 9, characterized in that: A central control panel cabinet safety circuit input status detection module and a central control panel cabinet safety circuit output status detection module are also provided, which are used to detect the input status and output status of the central control panel cabinet safety circuit respectively, so that the platform door system software can judge whether the wiring between the two is normal according to the output status of the central control panel safety circuit and the safety circuit information of the first sliding door, and judge whether the wiring between the two is normal according to the input status of the central control panel cabinet safety circuit and the safety circuit information of the end sliding door.

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