DCU controller applied to platform door and door control system

Abstract

The utility model relates to the technical field of rail transit, in particular to a DCU controller applied to a platform door and a door control system. The DCU controller comprises an automobile connector, an MCU chip and a network communication unit, and further comprises a power supply conversion unit, a lock control unit, a signal detection unit, a function control unit and a network communication unit which are connected with the automobile connector. The power supply conversion unit is electrically connected with the MCU chip, the lock control unit, the signal detection unit, the function control unit and the network communication unit. The lock control unit, the function control unit, the signal detection unit and the network communication unit are respectively in communication connection with the MCU chip. According to the technical scheme, all the terminal cables connected with the external terminal in the DCU controller are directly integrated into the single port of the automobile connector, IO interface equipment can be omitted, and the installation / maintenance cost and difficulty of the system are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit, in particular to a DCU controller and a door control system applied to platform screen doors. Background Art

[0002] The platform screen door is a barrier composed of multiple platform unit doors installed at the platform edge to isolate the platform area from the track area, and is a key component of the platform screen door system (abbreviated as PSD system). In the PSD system, a door travel switch for collecting status information and a DCU controller (Door Control Unit, platform unit door controller, abbreviated as DCU controller) for controlling the opening or closing of the platform unit door are provided on each platform unit door of the platform screen door.

[0003] A traditional platform screen door system, such as a rail transit platform screen door network control system and control method disclosed in a Chinese invention patent document with the publication number of CN116331267A, the control system includes a central control panel and multiple door controller units. The central control panel includes a first control module and a second control module. The door controller units include multiple first door controller units for controlling the platform screen doors on the first side and multiple second door controller units for controlling the platform screen doors on the second side. The first control module is connected to multiple first door controller units and multiple second door controller units through a first bus, and the second control module is connected to multiple first door controller units and multiple second door controller units through a second bus. The first control module and the second control module are redundant to each other and control multiple first door controller units and multiple second door controller units at the same time. The two control modules of the present invention are redundant to each other. When one set of control modules fails, the other set of control modules can still control, without affecting the operation on both sides. The central control panel and the door controller units use bus communication, which simplifies the control interface.

[0004] The number of movable doors controlled by a traditional platform screen door system is generally less than 50 groups, that is, the bus communication methods such as the 485 bus or CAN bus adopted by the DCU controller in the above prior art can be used to achieve this. However, the number of nodes of this communication method is limited, and the communication rate is not high, resulting in a delay in the update of the device status. In today's new intelligent platform screen door system, since hundreds or thousands of DCU controllers need to be managed, obviously the communication method of the traditional platform screen door system may not meet the communication requirements of the system. In addition, for a single DCU controller in a traditional platform screen door system to access the platform screen door system to achieve corresponding control, detection, and other signal interaction functions, its electrical wiring needs to be as Figure 4 shown, access a large number of intermediate IO conversion devices, which not only increases the cost of the system, but also increases the difficulty of maintenance. Summary of the Utility Model

[0005] The object of the present utility model is to address the deficiencies existing in the above-mentioned prior art, and to propose a DCU controller and a door control system applied to platform screen doors, which simplify the wiring complexity, improve the overall efficiency of the system, and at the same time allow real-time remote monitoring and control, which is crucial for the safety and normal operation of rail transit.

[0006] The present utility model is achieved by adopting the following technical solutions:

[0007] A DCU controller applied to platform screen doors includes an automotive connector, an MCU chip, a power supply conversion unit, a lock control unit, a signal detection unit, a function control unit, and a network communication unit. The power supply conversion unit includes an input port and a plurality of output ports; the power supply conversion unit is electrically connected to the automotive connector through its input port, and is electrically connected to the MCU chip, the lock control unit, the signal detection unit, the function control unit, and the network communication unit respectively through each output port. The lock control unit is electrically connected to the automotive connector, and the MCU chip is communicatively connected to the lock control unit for detecting and obtaining the status quantity feedback signal of the platform screen door electromagnetic lock through the lock control unit, and controlling the lock control unit to complete the status control and operation protection of the platform screen door electromagnetic lock based on the status quantity feedback signal. The MCU chip is communicatively connected to the automotive connector through the function control unit for controlling the operation of each functional component in the platform screen door unit through the function control unit. The MCU chip is communicatively connected to the automotive connector through the signal detection unit for detecting and obtaining the working signals of each functional component in the platform screen door unit through the signal detection unit. The network communication unit is communicatively connected to the MCU chip for supporting the DCU controller to connect to the central control device.

[0008] Preferably, it further includes a DCU driver, and the DCU driver is communicatively connected to the MCU chip through a UART port for controlling the opening and closing actions of the platform screen door according to the instructions of the MCU chip, and sending the status information of the platform screen door to the MCU chip.

[0009] Preferably, the power supply conversion unit includes a protection / filter circuit, a DCDC5V conversion circuit, an LDO3.3V conversion circuit, and a REF3.3V reference circuit that are electrically connected in sequence, and the LDO3.3V conversion circuit and the REF3.3V reference circuit are jointly connected to the MCU chip.

[0010] Preferably, the lock control unit includes an electromagnetic lock voltage switching circuit; the electromagnetic lock voltage switching circuit is communicatively connected to the automotive connector and the MCU chip bidirectionally; the first output terminal of the protection / filter circuit is connected to the electromagnetic lock voltage switching circuit through a diode I, and the second output terminal of the DCDC5V conversion circuit is connected to the electromagnetic lock voltage switching circuit through a diode II.

[0011] Preferably, the function control unit includes an audible and visual alarm driving circuit, a sill strip light driving circuit, and a hard wire output control circuit. The control signal input end of the audible and visual alarm driving circuit is communicatively connected to the MCU chip, and the control signal output end of the audible and visual alarm control is communicatively connected to the vehicle connector; the second output end of the protection / filter circuit is connected to the audible and visual alarm driving circuit. The control signal input end of the sill strip light driving circuit is communicatively connected to the MCU chip, and the control signal output end of the sill strip light driving circuit is communicatively connected to the vehicle connector; the third output end of the protection / filter circuit is connected to the sill strip light driving circuit. The control signal input end of the hard wire output control circuit is communicatively connected to the MCU chip, and the control signal output end of the hard wire output control circuit is communicatively connected to the vehicle connector.

[0012] Preferably, the signal detection unit includes a hard wire input detection circuit, a limit switch detection circuit, and an LCB signal detection circuit. The detection signal input end of the hard wire input detection circuit is communicatively connected to the vehicle connector, and the detection signal output end of the hard wire input detection circuit is communicatively connected to the MCU chip. The detection signal input end of the limit switch detection circuit is communicatively connected to the vehicle connector, and the detection signal output end of the limit switch detection circuit is communicatively connected to the MCU chip; the fourth output end of the protection / filter circuit is connected to the limit switch detection circuit. The detection signal input end of the LCB signal detection circuit is communicatively connected to the vehicle connector, and the detection signal output end of the LCB signal detection circuit is communicatively connected to the MCU chip; the fifth output end of the protection / filter circuit is connected to the LCB signal detection circuit.

[0013] Preferably, the network communication unit includes an RJ45 Ethernet interface and an Ethernet driving circuit; the RJ45 Ethernet interface is communicatively connected to the MCU chip through the Ethernet driving circuit; the third output end of the DCDC5V conversion circuit is connected to the Ethernet driving circuit.

[0014] A door control system includes a plurality of the aforementioned DCU controllers applied to platform doors, and further includes a central control device and a network switch; all DCU controllers are respectively communicatively connected to the central control device through the network switch.

[0015] Based on the above technical solution, during the operation of the MCU chip, the lifting / release signal, hard-wired door opening / closing signal, limit switch signal, LCB signal and other terminal device signals of the platform screen door electromagnetic lock are detected in real time by the lock control unit, and the relevant status is generated and uploaded to the central control equipment terminal such as the PSC through Ethernet. The central control equipment terminal combines information such as the vehicle type and vehicle number in the station to complete relevant logical judgments and determine the number of the movable doors that need to slide. Further, after data matching, it is sent to the DCU controller through Ethernet. The DCU controller controls the DCU driver to complete the opening and closing actions of the movable doors. The DCU controller receives in real time the relevant status information such as the real-time position and current of the movable doors reported by the DCU driver and reports it to the central control equipment terminal.

[0016] The beneficial technical effects brought by the present utility model:

[0017] 1) In this technical solution, all the terminal cables connecting the DCU controller to external terminals are directly integrated into a single port of the automotive connector. In this way, when the DCU controller is connected to the electrical wiring of the platform door system, the use of IO interface devices can be cancelled, greatly reducing the system installation / maintenance cost and difficulty.

[0018] 2) This technical solution integrates the DCU driver and the DCU controller together and adopts the UART communication method, which improves the communication efficiency, supports the timely transmission of signals, and plays an important role in simplifying the electrical wiring of the platform door system and is of great significance for reducing the system installation / maintenance cost and difficulty.

[0019] 3) The DCU controller supports Ethernet communication, which can achieve high-speed and reliable data transmission, thereby improving the overall performance and response speed of the platform door system.

[0020] 4) A door control system disclosed in this technical solution adopts the Ethernet communication method, and a large number of DCU controllers can be deployed simultaneously within the local area network for use in the new intelligent platform door system, with almost no node number limit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of a preferred DCU driver for this technical solution;

[0022] Figure 2 It is a partial structural schematic diagram of the electromagnetic lock voltage switching circuit;

[0023] Figure 3 It is a schematic structural diagram of the composition of a door control system;

[0024] Figure 4 It is a schematic diagram of the electrical wiring conditions of an existing single DCU controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the purpose, technical solutions and advantages of the utility model clearer, the technical solutions in the utility model will be clearly and completely described below with reference to the accompanying drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all embodiments.

[0026] Therefore, the detailed description of the utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the utility model without creative efforts belong to the scope of protection of the utility model.

[0027] Embodiment 1

[0028] This embodiment discloses a DCU controller applied to a platform door. As a preferred implementation of the utility model, as Figure 1 shown, it includes an automotive connector, an MCU chip, a power supply conversion unit, a locking control unit, a signal detection unit, a function control unit and a network communication unit.

[0029] The power supply conversion unit includes an input port and several output ports; the power supply conversion unit is electrically connected to the automotive connector through its input port, and is electrically connected to the MCU chip, the locking control unit, the signal detection unit, the function control unit and the network communication unit through each output port respectively. Thus, the power supply conversion unit is used to convert the externally connected power supply into the working power supply required by functional modules such as the MCU chip, the locking control unit, the signal detection unit, the function control unit and the network communication unit in this technical solution. In actual application, an external power supply is connected to the DCU controller through the automotive connector.

[0030] The locking control unit is electrically connected to the automotive connector, and the MCU chip is communicatively connected to the locking control unit, and is used to detect and obtain the status quantity feedback signal of the platform door electromagnetic lock through the locking control unit, and control the locking control unit to complete the status control and operation protection of the platform door electromagnetic lock based on the status quantity feedback signal. The operation states of the platform door electromagnetic lock include three states: attraction, attraction hold and release, and the status quantity feedback signal includes the attraction state signal, the hold state signal and the release state signal of the platform door electromagnetic lock. Among them, the status control includes the switching between the instantaneous attraction voltage and the hold attraction voltage, etc.; the operation protection includes overcurrent protection, and absorbing the reverse energy when the platform door electromagnetic lock is released, etc.

[0031] The MCU chip is connected to the vehicle connector through the functional control unit, and is used to control the operation of each functional component in the shield door unit through the functional control unit. Among them, the shield door unit is divided according to the layout of fixed doors and movable doors at the platform site; a platform contains several shield door units; a shield door unit contains a set of matching fixed doors and movable doors (referred to as shield door group), as well as functional components of the shield door group; in addition to some necessary shield door control components (such as limit switches and hard wires, etc.), the functional components also include some supporting facilities set up according to the needs of the platform (such as sill light strips and sound and light alarms, etc.).

[0032] The MCU chip is connected to the vehicle connector through a signal detection unit for detecting and obtaining the working signals of each functional component in the shielding door unit through the signal detection unit, so as to obtain the working status and fault conditions of each functional component according to the working signals, and provide a basis for the control and maintenance of each functional module.

[0033] The network communication unit is connected to the MCU chip to support the DCU controller to connect to the central control device, which can be the PSC (central control panel) terminal of the PSD system or other terminal devices (such as railway travel service system, etc.).

[0034] In this technical solution, the car connector is used to build a bridge of communication between blocked or isolated circuits in the circuit, so that the current can flow and the circuit can achieve the predetermined function. Therefore, this technical solution directly integrates all the terminal cables connected to the external terminals inside the DCU controller into the single port of the car connector. In this way, the DCU controller can eliminate the use of IO interface devices in the electrical wiring of the platform door system, which greatly reduces the system installation / maintenance cost and difficulty.

[0035] Example 2

[0036] This embodiment discloses a DCU controller applied to a platform door, as a preferred implementation scheme of the utility model, that is, based on Example 1, as shown in FIG. Figure 1 As shown, it also includes a DCU driver, and the DCU driver is connected to the MCU chip through the UART port, and is used to control the opening and closing of the shielding door according to the instructions of the MCU chip, and send the status information of the shielding door to the MCU chip. Among them, the DCU driver is a module that controls the opening and closing of the movable door in the shielding door unit, specifically, it drives the shielding door motor to operate to control the opening and closing of the movable door.

[0037] This technical solution integrates the DCU driver and the DCU controller, which plays an important role in simplifying the electrical wiring of the platform screen door system and is of great significance for reducing the system installation / maintenance cost and difficulty. In addition, it adopts the UART communication method, which has the characteristics of high communication efficiency and supports the timely transmission of signals, so that faster and more accurate control and monitoring can be realized. Among them, the status information of the screen door includes the real-time position of the active door and the coil current of the screen door motor, etc. After the MCU chip obtains the relevant status information of the screen door, it can be uploaded to the central control settings such as the PSC terminal through the network communication unit.

[0038] Embodiment 3

[0039] This embodiment discloses a DCU controller applied to a platform screen door. As a preferred implementation of the present utility model, that is, based on Embodiment 1 or 2, as Figure 1 shown, its power supply conversion unit includes a protection / filter circuit, a DCDC5V conversion circuit, an LDO3.3V conversion circuit, and a REF3.3V reference circuit that are electrically connected in sequence. The LDO3.3V conversion circuit and the REF3.3V reference circuit are jointly connected to the MCU chip.

[0040] Based on the composition structure of the above power supply conversion unit, the external power supply is connected to the power supply conversion unit through an automotive connector, and 24V direct current is input to the protection / filter module. The protection / filter module contains a protection circuit and an EMI filter circuit, which play the roles of overcurrent protection, reverse connection protection, surge and electrostatic protection, and power supply filtering. The protection / filter module has multiple output terminals, and each output terminal outputs 24V direct current after filtering. One of the output terminals leads to the DCDC5V conversion circuit and supplies power to the lock control unit, and the remaining output terminals lead to the signal detection unit and the function control unit. The DCDC5V conversion circuit converts 24V direct current into 5V direct current. The DCDC5V conversion circuit has three output terminals, which are respectively connected to the LDO3.3V conversion circuit, the lock control unit, and the network communication unit with 5V direct current. The LDO3.3V conversion circuit (low dropout linear voltage regulator circuit) converts 5V direct current into 3.3V direct current and leads to the MCU chip and the REF3.3V reference circuit respectively. Among them, during the operation of the DCU controller, the interference of the PSD system will cause the 3.3V direct current input to the MCU chip by the LDO3.3V conversion circuit to fluctuate, while the REF3.3V reference circuit provides a stable reference voltage for the ADC function of the MCU chip.

[0041] Embodiment 4

[0042] This embodiment discloses a DCU controller applied to a platform screen door. As a preferred implementation of the present utility model, that is, based on Embodiment 3, as Figure 1As shown in the figure, the lock control unit includes an electromagnetic lock voltage switching circuit; the electromagnetic lock voltage switching circuit is bidirectionally communicatively connected to the vehicle connector and the MCU chip respectively; the first output terminal of the protection / filter circuit is connected to the electromagnetic lock voltage switching circuit through Diode I, and the second output terminal of the DCDC5V conversion circuit is connected to the electromagnetic lock voltage switching circuit through Diode II.

[0043] In this technical solution, the electromagnetic lock voltage switching circuit is mainly used to complete the switching of the instantaneously attracting voltage and the maintaining attracting voltage of the platform screen door electromagnetic lock. Among them, the instantaneously attracting voltage is DC24V, provided by the protection / filter circuit; the maintaining attracting voltage is DC4.3V, provided by the DCDC5V conversion circuit, that is, Diode II steps down the DC5V output by the DCDC5V conversion circuit to DC4.3V and then inputs it into the electromagnetic lock voltage switching circuit. Based on the above high and low voltage switching logic required for controlling the platform screen door electromagnetic lock, Diode I and Diode II cooperate to achieve the purpose of isolating high voltage and low voltage.

[0044] According to the voltage conduction state of the electromagnetic lock voltage switching circuit, the status quantity feedback signal of the platform screen door electromagnetic lock can be obtained, and this status quantity feedback signal of the platform screen door electromagnetic lock is converted into an electrical signal of DC3.3V and sent to the GPIO port (general-purpose input / output port) of the MCU.

[0045] As Figure 2 shown, a partial structure of an electromagnetic lock voltage switching circuit is disclosed, where R1~R9 are resistors, F1 is a fuse, D1, D2 and D7 are ordinary diodes, D3 and D4 are light-emitting diodes, D5 and D6 are bidirectional transient voltage suppressors, Q1 is a P-MOS transistor, and U11 is an optocoupler device. VCC_LOCK_24V comes from the protection / filter circuit connected by Diode I; VCC_LOCK_3V3 directly comes from inside the electromagnetic lock voltage switching circuit and indirectly comes from the DCDC5V conversion circuit connected by Diode II. After the DC4.3V output by Diode II is converted into DC3.3V inside the electromagnetic lock voltage switching circuit, it is input into the VCC_LOCK_3V3 port. The pin 1 and pin 3 of the optocoupler device U11 can be connected to the LDO3.3V conversion circuit, and its pin 2 (LOCK_SET_PIN) and pin 4 (LOCK_POWER_PIN) are connected to the MCU chip.

[0046] After the MCU chip obtains the status quantity feedback signal, it controls the optocoupler device U11 through pin 2 (LOCK_SET_PIN) or pin 4 (LOCK_POWER_PIN). Further, the optocoupler device U11 controls the P-MOS transistor Q1, and the P-MOS transistor Q1 realizes the on / off control of the ordinary diode D1 (DC24V) or the ordinary diode D2 (DC3.3V). When the ordinary diode D1 is turned on, the light-emitting diode D3 lights up. When the ordinary diode D2 is turned on, the light-emitting diode D4 lights up. In summary, this technical solution uses the optocoupler device U11 to control the P-MOS transistor Q1 to realize the switching between the instantaneous pull-in voltage and the holding pull-in voltage. In addition, the fuse F1 is used for abnormal protection of the current of the platform door electromagnetic lock coil, the ordinary diode D7 is used for absorbing and eliminating the reverse electromotive force generated at the moment when the platform door electromagnetic lock coil is disconnected, the bidirectional transient voltage suppressor diode D6 (TVS) is used for absorbing and eliminating the instantaneous surge from the platform door electromagnetic lock coil, and the bidirectional transient voltage suppressor diode D6 (ESD) is used for absorbing and eliminating the static electricity from the platform door electromagnetic lock coil.

[0047] Embodiment 5

[0048] This embodiment discloses a DCU controller applied to a platform door. As a preferred implementation of the present invention, that is, based on Embodiment 3 or 4, as Figure 1 shown, the function control unit includes an acoustic-optic alarm driving circuit, a sill strip light driving circuit, and a hard-wire output control circuit.

[0049] The control signal input end of the acoustic-optic alarm driving circuit is communicatively connected to the MCU chip, and the control signal output end of the acoustic-optic alarm control is communicatively connected to the automotive connector; the second output end of the protection / filter circuit is connected to the acoustic-optic alarm driving circuit. The acoustic-optic alarm, as a basic functional component equipped for the platform door unit of the platform, has functions such as opening / closing door prompts. The acoustic-optic alarm is connected to the automotive connector, and the MCU chip controls the operation of the acoustic-optic alarm through the acoustic-optic alarm driving circuit. Among them, the acoustic-optic alarm driving circuit can realize the driving function of the acoustic-optic alarm based on a logic output optocoupler, that is, the MCU chip controls the conduction state of the acoustic-optic alarm driving circuit through the logic output optocoupler in the acoustic-optic alarm driving circuit, and further controls the on / off power supply of the acoustic-optic alarm, so as to realize the driving of the acoustic-optic alarm.

[0050] The control signal input terminal of the sill strip light driving circuit is communicatively connected to the MCU chip, and the control signal output terminal of the sill strip light driving circuit is communicatively connected to the vehicle connector; the third output terminal of the protection / filtering circuit is connected to the sill strip light driving circuit. The sill strip light, as a basic functional component equipped for most platforms for the platform screen door unit, has the function of prompting passengers about the road conditions under their feet. By connecting the sill strip light to the vehicle connector, the MCU chip controls the operation of the sill strip light through the sill strip light driving circuit. Among them, the sill strip light driving circuit can realize the driving function of the sill strip light based on a relay, that is, the MCU chip controls the conduction state of the relay through the relay in the sill strip light driving circuit, and further controls the on / off of the sound and light alarm, so as to realize the driving of the sill strip light.

[0051] The control signal input terminal of the hard wire output control circuit is communicatively connected to the MCU chip, and the control signal output terminal of the hard wire output control circuit is communicatively connected to the vehicle connector. In the field of rail transit, the hard wire output refers to a switch node signal used to indicate the closed and locked state of the corresponding movable door, and the corresponding hard wire output function can be realized based on a relay. Specifically: In the prior art, a cable is used in the platform to connect in series the hard wire output switch nodes (relays) of the DCU controllers of all movable doors on the same side. In this technical solution, the hard wire output control circuit is connected to the aforementioned cable through the vehicle connector, and the relay inside the hard wire output control circuit serves as the corresponding switch node. The MCU chip only controls the opening and closing of this switch node (relay), that is: when the corresponding movable door is closed and locked, the MCU chip controls this switch node (relay) to close, otherwise it controls this switch node (relay) to open; only when all relevant movable doors are closed and locked, that is, all switch nodes (relays) on the aforementioned cable are closed, the aforementioned cable is in a conducting state, otherwise the cable is in a disconnected state.

[0052] Embodiment 6

[0053] This embodiment discloses a DCU controller applied to a platform door. As a preferred implementation of the present invention, that is, based on Embodiment 3, 4 or 5, as Figure 1 shown, the signal detection unit includes a hard wire input detection circuit, a limit switch detection circuit, and an LCB signal detection circuit.

[0054] The detection signal input terminal of the hard wire input detection circuit is communicatively connected to the vehicle connector, and the detection signal output terminal of the hard wire input detection circuit is communicatively connected to the MCU chip. In the field of rail transit, a hard wire input refers to a door opening and closing digital signal, which is divided into a door opening signal and a door closing signal. Specifically, the door opening and closing digital signal is input into the hard wire input detection circuit through the vehicle connector. According to the division of the door opening signal and the door closing signal, the corresponding relay inside the hard wire input detection circuit is driven to close and conduct. The MCU chip then performs corresponding logical processing based on the conduction signal inside the hard wire input detection circuit, that is: when a hard wire input door opening signal is received, corresponding door opening control is executed; when a hard wire input door closing signal is received, corresponding door closing control is executed.

[0055] The detection signal input terminal of the limit switch detection circuit is communicatively connected to the vehicle connector, and the detection signal output terminal of the limit switch detection circuit is communicatively connected to the MCU chip; the fourth output terminal of the protection / filter circuit is connected to the limit switch detection circuit. In the field of rail transit, limit switches are widely used as physical switches for detecting the closing position and opening position of the sliding door, and an optoelectronic trigger switch or a mechanical trigger switch can be selected according to needs. When the limit switch is triggered, the limit switch detection circuit obtains the limit switch conduction signal through the vehicle connector and makes a corresponding output indication. The MCU chip uses the limit switch conduction signal obtained by the limit switch detection circuit for subsequent related logical control processing.

[0056] The detection signal input terminal of the LCB signal detection circuit is communicatively connected to the vehicle connector, and the detection signal output terminal of the LCB signal detection circuit is communicatively connected to the MCU chip; the fifth output terminal of the protection / filter circuit is connected to the LCB signal detection circuit. The local control box LCB generally has four positions, namely the automatic position, the isolation position, the manual open position, and the manual close position. That is, the MCU chip can obtain the position information of the local control box LCB through the LCB signal detection circuit. In actual operation: when the local control box LCB is in the automatic position, the MCU chip controls the opening and closing actions of the platform screen door unit depending on the instructions issued by the central control device. When the local control box LCB is in the manual close position, the MCU chip can perform corresponding door closing control and other related logical judgments. When the local control box LCB is in the manual open position, the MCU chip can perform corresponding door opening control and other related logical judgments. When a single platform screen door unit fails, the local control box LCB isolates the control subsystem of this platform screen door unit from the control subsystems of other platform screen door units based on the isolation position. It can issue door opening and closing commands to the door control unit DCU on-site without affecting the operation of other control subsystems, which is convenient for maintenance.

[0057] Embodiment 7

[0058] This embodiment discloses a DCU controller applied to platform screen doors. As a preferred implementation of the present utility model, that is, based on Embodiments 1, 2, 3, 4, 5 or 6, as Figure 1 shown, the network communication unit includes an RJ45 Ethernet interface and an Ethernet driver circuit; the RJ45 Ethernet interface is communicatively connected to the MCU chip through the Ethernet driver circuit; the third output terminal of the DCDC5V conversion circuit is connected to the Ethernet driver circuit.

[0059] In this technical solution, the DCU controller adopts the Ethernet communication method, has the ability to respond quickly to the control instructions of the central control device, and can simultaneously report the status information of the screen door unit in real time. These status information include the current position, movement state, operating current, etc. of the active door, as well as the signal status of each terminal device. To sum up, by using Ethernet communication, this technical solution can achieve high-speed and reliable data transmission, thereby improving the overall performance and response speed of the platform screen door system.

[0060] Embodiment 8

[0061] This embodiment discloses a door control system. As a preferred implementation of the present utility model, as Figure 3 shown, it includes several DCU controllers of the type applied to platform screen doors described in the foregoing Embodiment 7, and also includes a central control device and a network switch; all DCU controllers are respectively communicatively connected to the central control device through the network switch.

[0062] This technical solution adopts the Ethernet communication method. A large number of DCU controllers can be deployed simultaneously within the local area network and used in the new intelligent platform screen door system, with almost no limit on the number of nodes.

Claims

1. A DCU controller applied to a platform door, characterized in that: It includes an automotive connector, an MCU chip, a power supply conversion unit, a lock control unit, a signal detection unit, a function control unit and a network communication unit; The power supply conversion unit includes an input port and a plurality of output ports; the power supply conversion unit is electrically connected to the vehicle connector through its input port, and is electrically connected to the MCU chip, the lock control unit, the signal detection unit, the function control unit and the network communication unit through each output port; The lock control unit is electrically connected to the vehicle connector, and the MCU chip is communicatively connected to the lock control unit, and is used to obtain a state quantity feedback signal of the shielded door electromagnetic lock through the lock control unit detection, and control the lock control unit based on the state quantity feedback signal to complete the state control and operation protection of the shielded door electromagnetic lock; The MCU chip is connected to the vehicle connector through the function control unit for controlling the operation of each functional component in the shielding door unit through the function control unit; The MCU chip is connected to the vehicle connector through a signal detection unit for detecting and obtaining working signals of various functional components in the shielding door unit through the signal detection unit; The network communication unit is connected to the MCU chip for supporting the DCU controller to connect to the central control device.

2. A DCU controller for platform doors as claimed in claim 1, characterized in that: The DCU driver is included, and the DCU driver is connected to the MCU chip through the UART port for controlling the opening and closing actions of the shielding door according to the instructions of the MCU chip, and sending the status information of the shielding door to the MCU chip.

3. A DCU controller for platform doors as claimed in claim 1, characterized in that: The power supply conversion unit includes a protection / filtering circuit, a DCDC5V conversion circuit, an LDO3.3V conversion circuit and a REF3.3V reference circuit which are electrically connected in sequence, and the LDO3.3V conversion circuit and the REF3.3V reference circuit are connected to the MCU chip together.

4. A DCU controller applied to a platform door as claimed in claim 3, characterized in that: The lock control unit includes an electromagnetic lock voltage switching circuit; the electromagnetic lock voltage switching circuit is bidirectionally connected to the vehicle connector and the MCU chip respectively; the first output end of the protection / filter circuit is connected to the electromagnetic lock voltage switching circuit through diode I, and the second output end of the DCDC5V conversion circuit is connected to the electromagnetic lock voltage switching circuit through diode II.

5. A DCU controller applied to a platform door as claimed in claim 3, characterized in that: The function control unit includes an audible and visual alarm driving circuit, a sill light strip driving circuit and a hard-line output control circuit; The control signal input end of the sound and light alarm driving circuit is connected to the MCU chip for communication, and the control signal output end of the sound and light alarm control is connected to the vehicle connector for communication; the second output end of the protection / filter circuit is connected to the sound and light alarm driving circuit; The control signal input end of the sill light strip driving circuit is connected to the MCU chip for communication, and the control signal output end of the sill light strip driving circuit is connected to the vehicle connector for communication; the third output end of the protection / filter circuit is connected to the sill light strip driving circuit; The control signal input end of the hard-line output control circuit is communicatively connected to the MCU chip, and the control signal output end of the hard-line output control circuit is communicatively connected to the vehicle connector.

6. A DCU controller applied to a platform door as claimed in claim 3, characterized in that: The signal detection unit includes a hard line input detection circuit, a limit switch detection circuit and an LCB signal detection circuit; The detection signal input end of the hard-line input detection circuit is communicatively connected to the automobile connector, and the detection signal output end of the hard-line input detection circuit is communicatively connected to the MCU chip; The detection signal input end of the limit switch detection circuit is connected to the automobile connector in communication, and the detection signal output end of the limit switch detection circuit is connected to the MCU chip in communication; the fourth output end of the protection / filter circuit is connected to the limit switch detection circuit; The detection signal input end of the LCB signal detection circuit is communicatively connected to the automobile connector, and the detection signal output end of the LCB signal detection circuit is communicatively connected to the MCU chip; the fifth output end of the protection / filtering circuit is connected to the LCB signal detection circuit.

7. A DCU controller applied to a platform door as claimed in claim 3, characterized in that: The network communication unit includes an RJ45 Ethernet interface and an Ethernet drive circuit; the RJ45 Ethernet interface is connected to the MCU chip through the Ethernet drive circuit; the third output end of the DCDC5V conversion circuit is connected to the Ethernet drive circuit.

8. A door control system, characterized in that: It comprises a plurality of DCU controllers applied to platform doors as described in any one of claims 1 to 7, and also comprises a central control device and a network switch; all DCU controllers are respectively connected to the central control device for communication via the network switch.

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