Safety circuit breakpoint detection device of platform door system

Abstract

The utility model discloses a platform door system safety circuit breakpoint detection device which comprises a DCU box and a safety circuit monitoring module arranged in the DCU box. The safety circuit monitoring module comprises an MCU control unit, and a power supply interface, an external I / O interface, a maintenance interface and a mode selection switch which are electrically connected with the MCU control unit. The external I / O interface comprises a safety loop inlet interface I1, a safety loop outlet interface I2, a first door in-place closing monitoring interface I3, a second door in-place closing monitoring interface I4, an electromagnetic lock monitoring interface I5, a safety loop communication port M1, an in-place closing communication port M2, a door head lamp output interface O1, a buzzer output interface O2 and a 24V + interface C1. When the safety circuit of the unit door is abnormal, the indicating lamp and the buzzer can be immediately started to work to reflect the position of a breakpoint in real time, so that maintenance personnel can conveniently identify and timely isolate a bypass, and the influence on the running of a train is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of platform door system, more particularly to a platform door system safety loop breakpoint detection device. BACKGROUND

[0002] In the existing rail transit platform door system, the safety loop is disconnected, but the disconnected point position cannot be found. The original system monitors the safety loop travel switch and monitors the state of the travel switch. However, in the actual situation, the safety loop may be disconnected due to poor contact of the cable harness.

[0003] The poor contact of the limit switch in the existing safety loop and the cable outside the terminal may cause the safety loop of the whole side to be disconnected. In addition, if the hardware door travel switch is under uncertain factors such as wind pressure, there may be instantaneous disconnection. The emergency door limit switch and the closing-to-position limit switch should be considered. The limit switch contacts used in the safety loop and the monitoring loop contacts connected to the LOGO are two different groups of contacts from the same limit switch. The emergency door limit switch and the closing-to-position limit switch both use peristaltic (slow-moving) limit switches. Under extreme conditions, one group of contacts may trigger while the other group of contacts does not trigger (for example, the door body rebounds due to wind pressure or other external forces after closing to position). This leads to inconsistency between the safety loop state and the monitoring loop state (safety loop disconnected, monitoring loop normal).

[0004] Therefore, a platform door system safety loop breakpoint detection device is needed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a platform door system safety loop breakpoint detection device, which overcomes the above-mentioned defects in the prior art.

[0006] The technical solution for achieving the utility model is: a platform door system safety loop breakpoint detection device, a DCU box and a safety loop monitoring module arranged in the DCU box; the safety loop monitoring module includes an MCU control unit and a power supply interface, an external I / O interface, a maintenance interface and a mode selection switch electrically connected to the MCU control unit, respectively; the external I / O interface includes a safety loop input interface I1, a safety loop output interface I2, a first door closing-to-position monitoring interface I3, a second door closing-to-position monitoring interface I4, an electromagnetic lock monitoring interface I5, a safety loop communication port M1, a closing-to-position communication port M2, a door header lamp output interface O1, a buzzer output interface O2 and a 24V+ interface C1.

[0007] As a preferred embodiment, the power supply interface includes a 24V+ interface P+ and a 24V- interface P-.

[0008] As a preferred embodiment, the maintenance interface is an interface for downloading an upgrade maintenance program.

[0009] As a preferred embodiment, the mode selection interface switch comprises a first dial code and a second dial code, the first dial code is provided with ON and OFF modes, and the second dial code is also provided with ON and OFF modes.

[0010] As a preferred embodiment, when the first dial code is in the ON position, the safety loop redundancy function is enabled, and when the first dial code is in the OFF position, the safety loop redundancy function is not enabled.

[0011] As a preferred embodiment, when the second dial code is in the ON position, after receiving a signal that a door is closed to a position, the safety loop signal has no alarm when there is no input and no output, and has an alarm when there is an input and no output; and when the second dial code is in the OFF position, the safety loop signal has an alarm when there is no input and no output, and also has an alarm when there is an input and no output.

[0012] As a preferred embodiment, the MCU control unit is electrically connected with a safety loop acquisition circuit, an external command acquisition circuit, an indicator buzzer control circuit and an isolation power supply circuit respectively; and the MCU control unit controls the indicator buzzer to start and stop through the indicator buzzer control circuit according to a signal acquired by the safety loop acquisition circuit.

[0013] As a preferred embodiment, the MCU control unit is of the STC8G1K08 type.

[0014] With the above technical scheme, the utility model has the following beneficial effects:

[0015] (1) When the unit door appears abnormal safety loop, the indicator and the buzzer will start working immediately, and the breakpoint position is reacted in real time, so that the maintenance personnel can identify and isolate the bypass in time, and the influence on train operation is reduced.

[0016] (2) The utility model adopts integrated design, integrates all functions in the DCU box, does not need to change the host computer and PLC program, and the unit door can be used on the same day after modification, the construction will not affect the normal operation of the next day, and is suitable for upgrading of the operating station.

[0017] (3) The utility model is managed by the MCU control unit, ensures the coordinated work between various interfaces, improves the stability and response speed of the system, and rich external I / O interface makes the system adapt to various application scenes and support flexible configuration.

[0018] (4) The design of the maintenance interface facilitates downloading of the upgrade maintenance program.

[0019] (5)The utility model discloses a mode selection interface switch, including first dial and second dial, and each dial is equipped with ON and OFF mode, and user can flexibly adjust the operation mode of system according to actual demand, adapts to different operating environment, adjusts alarm logic according to actual situation, avoids unnecessary alarm, improves the effectiveness and accuracy of alarm. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the content of the utility model more easily be clearly understood, below according to specific embodiment and combining with the drawings, the utility model is further detailed, wherein

[0021] Figure 1 It is the schematic diagram of the utility model.

[0022] Figure 2 It is the circuit of MCU control unit of the utility model.

[0023] Figure 3 It is the safety circuit acquisition circuit.

[0024] Figure 4 It is the external command acquisition circuit.

[0025] Figure 5 It is the indicator buzzer control circuit.

[0026] Figure 6 It is the isolation power supply circuit. DETAILED DESCRIPTION

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below combining with the drawings of the specification and specific implementation.

[0028] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below combining with the drawings in the utility model embodiment, obviously, the described embodiment is a part of the embodiment of the utility model, rather than all the embodiment. The components of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the utility model.

[0030] It should be noted that like reference numerals and letters refer to like items in the several views, and once an item is defined in one view, it should not be further defined and explained in subsequent views.

[0031] In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In the description of the embodiments of the present application, it should be understood that the terms "set", "mounted", "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The present application will be further described below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and cannot be used to limit the protection scope of the present application.

[0033] In the existing rail transit door system, the safety circuit is disconnected, but the position of the disconnected point cannot be found. In the original system, the travel switch of the safety circuit is monitored, and the state of the travel switch is monitored. However, there may be poor contact of the cable harness in the field, which causes the safety circuit to be disconnected. In order to solve this difficulty, it is suggested to upgrade the existing safety circuit and monitoring.

[0034] Embodiment 1, see Figure 1 A safety circuit breakpoint detection device of a platform door system, comprising a DCU box and a safety circuit monitoring module arranged in the DCU box; the safety circuit monitoring module comprises an MCU control unit and a power supply interface, an external I / O interface, a maintenance interface and a mode selection switch which are electrically connected with the MCU control unit respectively; the external I / O interface comprises a safety circuit input interface I1, a safety circuit output interface I2, a first door closing to position monitoring interface I3, a second door closing to position monitoring interface I4, an electromagnetic lock monitoring interface I5, a safety circuit communication port M1, a closing to position communication port M2, a door header lamp output interface O1, a buzzer output interface O2 and a 24V+ interface C1.

[0035] The safety loop input interface I1 is used for receiving the input signal of the safety loop; the safety loop output interface I2 is used for transmitting the output signal of the safety loop; the first door closed monitoring interface I3 is used for monitoring whether the first door is completely closed; the second door closed monitoring interface I4 is used for monitoring whether the second door is completely closed; and the electromagnetic lock monitoring interface I5 is used for monitoring the state of the electromagnetic lock.

[0036] The safety loop communication port M1 is used for data communication of the safety loop; and the closed monitoring communication port M2 is used for data communication of the door closed state.

[0037] The door head lamp output interface O1 is used for controlling the door head indicator lamp; the buzzer output interface O2 is used for controlling the alarm buzzer; and the 24V+ interface C1 is used for providing an additional 24V power output.

[0038] The power supply interface includes the 24V+ interface P+ and the 24V- interface P-; and the maintenance interface is an interface for downloading the upgrade maintenance program.

[0039] The mode selection interface switch includes a first dial code and a second dial code, and the first dial code is provided with ON and OFF modes, and the second dial code is also provided with ON and OFF modes.

[0040] When the first dial code is located at the ON position, the safety loop redundancy function is enabled, and when the lock is detected to be in the closed position and the travel switch is closed, the system will short the input and output of the safety loop to realize redundancy.

[0041] When the first dial code is located at the OFF position, the safety loop redundancy function is not enabled, and the system works in a conventional manner.

[0042] When the second dial code is located at the ON position, after receiving the signal of the door closed, if there is no input and output of the safety loop, no alarm will be triggered; if there is input and no output, an alarm will be triggered.

[0043] When the second dial code is located at the OFF position, after receiving the signal of the door closed, whether the safety loop has no input and output or has input and no output, an alarm will be triggered.

[0044] In the embodiment, the following four modes can be provided:

[0045] (1) Conventional mode: second dial code OFF, first dial code OFF

[0046] If the door is completely closed but the safety loop has no activity (no input and output), the system will trigger an alarm. If an object enters the safety loop but does not leave (has input and no output), an alarm will also be triggered. At the same time, no redundancy measures are used.

[0047] (2) Redundancy mode + strict alarm mode: second dial code OFF, first dial code ON

[0048] When the door is closed and the lock is detected to be in place, the system shorts the input and output of the safety circuit, ensuring the integrity of the circuit. However, even in this state, if the safety circuit has no input or has input but no output, an alarm is triggered.

[0049] (3) Loose alarm mode: second dial ON, first dial OFF

[0050] If the door is fully closed and the safety circuit has no input or output, no alarm is triggered. However, if an object enters the safety circuit but does not exit (has input but no output), the system triggers an alarm. At this time, the redundancy function is not enabled.

[0051] (4) Redundancy mode + loose alarm mode: second dial ON, first dial ON

[0052] When the door is closed and the lock is detected to be in place, the system shorts the input and output of the safety circuit, ensuring the integrity of the circuit. In this state, an alarm is triggered only if an object enters the safety circuit but does not exit (has input but no output); if the safety circuit has no input or output, no alarm is triggered.

[0053] By adjusting the positions of the first dial and the second dial, the safety of the system and the sensitivity of the alarm can be flexibly controlled. The second dial determines the response mode to the safety circuit state when the door is closed, while the first dial controls whether to enable the redundancy function of the safety circuit to improve the reliability of the system.

[0054] See Figures 2 to 6 The MCU control unit is electrically connected with the safety circuit acquisition circuit, the external command acquisition circuit, the indicator buzzer control circuit, and the isolation power supply circuit, respectively. The MCU control unit controls the indicator buzzer to start and stop according to the signal collected by the safety circuit acquisition circuit through the indicator buzzer control circuit. The type of the MCU control unit is STC8G1K08.

[0055] The above-described specific embodiments further illustrate the purpose, technical solutions, and beneficial effects of the present application. It should be understood that the above-described specific embodiments are merely examples of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A platform door system safety circuit break detection device, characterized by: The safety circuit monitoring module comprises an MCU control unit and a power supply interface, an external I / O interface, a maintenance interface and a mode selection switch which are electrically connected with the MCU control unit respectively; the external I / O interface comprises a safety circuit input interface I1, a safety circuit output interface I2, a first door closed position monitoring interface I3, a second door closed position monitoring interface I4, an electromagnetic lock monitoring interface I5, a safety circuit communication port M1, a closed position communication port M2, a door head lamp output interface O1, a buzzer output interface O2 and a 24V+ interface C1.

2. A platform door system safety circuit break detection device according to claim 1, characterised in that: The power supply interface comprises a 24V+ interface P+ and a 24V- interface P-.

3. A platform door system safety circuit break detection device according to claim 1, characterized in that: The maintenance interface is an interface for downloading an upgrade maintenance program.

4. A platform door system safety circuit break detection device according to claim 1, characterized in that: The mode selection switch comprises a first dial code and a second dial code, the first dial code is provided with ON and OFF modes, and the second dial code is also provided with ON and OFF modes.

5. A platform door system safety circuit break detection device according to claim 4, characterised in that: When the first dial code is located at the ON position, the safety circuit redundancy function is enabled; when the first dial code is located at the OFF position, the safety circuit redundancy function is not enabled.

6. A platform door system safety circuit break detection device according to claim 4, characterised in that: When the second dial code is located at the ON position, after receiving a door closed position signal, the safety circuit signal has no alarm when there is no input and no output, and has alarm when there is input and no output; when the second dial code is located at the OFF position, the safety circuit signal has alarm when there is no input and no output, and also has alarm when there is input and no output.

7. A platform door system safety circuit break detection device according to claim 1, characterized in that: The MCU control unit is electrically connected with a safety circuit acquisition circuit, an external command acquisition circuit, an indicator buzzer control circuit and an isolation power supply circuit respectively; the MCU control unit controls the indicator buzzer to start and stop through the indicator buzzer control circuit according to the signal acquired by the safety circuit acquisition circuit.

8. A platform door system safety circuit break detection device according to claim 7, characterised in that: The MCU control unit is of STC8G1K08 type.

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