CN113778014A - Distributed platform door controller - Google Patents

Abstract

The invention discloses a distributed platform door controller, comprising: a secure PLC and at least one Ethernet communication module; the power supply modules are respectively connected with a power supply and are respectively used for supplying power to the logic control processor, the safety industrial bus interface, the safety digital IO interface and each Ethernet communication module of the safety PLC; the safety PLC comprises a logic control processor, a safety industrial bus interface and a safety digital IO interface. The Ethernet communication module is responsible for communicating with the WSC and the VOBC; the secure industrial bus interface is in communication with a PSC or DCU; the secure digital IO interface communicates with a PSC or DCU. The invention replaces a relay interface circuit between a signal system and a platform door system, saves cost and improves reliability.

Description

Distributed platform door controller

Technical Field

The invention relates to the field of urban rail transit and discloses a distributed platform door controller.

Background

In the current urban rail transit line, a signal system and a platform door control system usually adopt a relay interface. A typical platform door control system using relay interfaces is shown in fig. 5 (only one station is shown), in which PSE is a platform door emergency control panel and PSL is a platform door local control panel, the same applies below. The interface circuit is shown in fig. 6. In practical applications, the relay interface has the following disadvantages.

1) The cable quantity is many, and the construction cost is high:

the interface equipment of the station door of the signal system is usually arranged in an equipment centralized station, and is connected with the station and the station door interfaces of non-equipment centralized stations in the jurisdiction range of the equipment centralized station through a safety relay and a hard wire, and each station and each side station door are required to be configured with one set of interface circuit. Since the equipment concentration station is usually far away from the non-equipment concentration station (hundreds of meters to thousands of meters, or even far away), the interface scheme consumes a large amount of cables, and the construction cost is high.

2) The safety relay is short-lived, influences system reliability, and spare part supply pressure is big, and the maintenance cost is high:

at present, the urban rail transit line of medium operation intensity, train about 200 (for example 12 to/hour x 16 hours) are driven every day, and platform door interface relay moves about 200 times every day, and to the safety relay that nominal life is 20 ten thousand, use about 3 years and need change promptly, not only influence system reliability, cause great spare part supply pressure simultaneously, promote maintenance cost.

3) The platform door control loop has a plurality of devices, and the control time delay is large:

when the signal system and the platform door system adopt a relay interface, taking a door opening and closing command as an example, a control loop of the system comprises a vehicle-mounted controller (VOBC), a trackside controller (WSC), a safety relay interface circuit, a platform door central controller (PSC) and a Door Control Unit (DCU). The control links are more, the total control time delay (from the door opening and closing command to the start of the door body) in the worst case is the sum of the control cycles of all the links, and the average control cycle is half of the sum of the control cycles of all the links. Since the control period of each device is usually several hundred milliseconds, eventually, the control period for opening and closing the door can be several seconds. The control cycle of opening and closing the door is too long, thereby occupying valuable stop time and greatly influencing the riding and landing efficiency.

Disclosure of Invention

The invention aims to provide a Distributed Platform Door Controller (DPSDC), which replaces a relay interface circuit between a signal system and a Platform Door system, saves cost and improves reliability.

The technical scheme for realizing the purpose is as follows:

a distributed platform door controller comprising:

a safety PLC (programmable logic controller) including a logic control processor, a safety industrial bus interface and a safety digital IO (input output) interface;

at least one Ethernet communication module is respectively connected with the safety PLC; and

the power supply modules are respectively connected with a power supply and are respectively used for supplying power to the control logic processor, the safety industrial bus interface, the safety digital IO interface and each Ethernet communication module;

the Ethernet communication module is respectively communicated with the WSC and the VOBC;

the secure industrial bus interface is in communication with a PSC or DCU;

the secure digital IO interface communicates with a PSC or DCU.

Preferably, the secure industrial bus interface is connected with the PSC or the DCU through an industrial bus;

the safe digital IO interface is connected with the PSC or the DCU through a hard wire.

Preferably, the secure digital IO interface is connected to hardware interface devices through hard wires, and the hardware interface devices include, but are not limited to, an emergency stop button, a personnel protection switch, and an automatic turn-back button.

Preferably, each power module is provided with an independent circuit breaker.

Preferably, the power supply is a two-way power supply.

Preferably, the Ethernet communication module wirelessly communicates with the VOBC through a redundant vehicle-ground wireless communication network;

the ethernet Communication module communicates with the WSC through a DCS (Data Communication System) redundant network or an independent fiber redundant network.

The invention has the beneficial effects that: the invention is realized based on the safety PLC, the safety integrity level is SIL4 level, meanwhile, the DPSDC communicates with the outside, and the safety Ethernet, the safety industrial bus and the safety digital IO are adopted, thereby greatly avoiding the safety threat caused by the system failure. The invention replaces and cancels the safety relay, thereby avoiding the influence of the service life problem of the safety relay on the reliability of the system and improving the overall reliability of the platform door control system. The invention can be arranged in a station signal machine room, a communication machine room or a platform door equipment room nearby. Communication between the DPSDC and the WSC is realized by means of a DCS redundant network or an independent optical fiber redundant network, and hard-wire connection is not needed, so that a large number of signal cables are saved. The construction and operation and maintenance cost of the system is reduced. The VOBC can directly communicate with the DPSDC of each station through a wireless network to realize the control of the station platform door. Compared with a platform door control system based on a relay interface, the number of devices on a control chain is obviously reduced, the system control time delay is greatly reduced, and the taking and landing efficiency is greatly improved. The invention can give consideration to other functions controlled by a hard wire interface, such as an Emergency Stop Button (ESB), a personnel protection switch (SPKS), an automatic turn-back button (ATB) and the like, thereby reducing the manufacturing cost of the system.

Drawings

FIG. 1 is a block diagram of a distributed platform door controller according to the present invention;

FIG. 2 is a schematic diagram of the present invention in which DPSDC interfaces directly with PSC;

FIG. 3 is a schematic diagram of a DPSDC direct drive DCU of the present invention;

FIG. 4 is a schematic diagram of a DPSDC incorporating SPKS, ESB, ATB, etc. devices of the present invention;

figure 5 is a block diagram of a prior art interface architecture for a signaling system and a platform door system;

figure 6 is a circuit diagram of a prior art signalling system and platform door system interface circuit.

Detailed Description

The invention will be further explained with reference to the drawings.

Referring to fig. 1-4, the distributed platform door controller of the present invention comprises: the safety PLC is composed of a control logic processor 1, a control logic processor 2, a safety industrial bus interface 3 and a safety digital IO interface. And 4, at least one ethernet communication module and 5, a plurality of power supply modules.

The secure PLC is connected to at least one ethernet communication module 4.

Each pair of power modules 5 is connected with a power supply and is respectively used for supplying power to the control logic processor 1, the secure industrial bus interface 2, the secure digital IO interface 3 and each Ethernet communication module 4. The power supply may be a dual power supply.

The ethernet communication module 4 communicates with the WSC and VOBC, respectively. The safety industrial bus interface 2 is communicated with a PSC or a DCU; the secure digital IO interface 3 communicates with a PSC or DCU. The secure industrial bus interface 2 is connected to a PSC or DCU through an industrial bus. The secure digital IO interface 3 is connected to the PSC or DCU by hard wiring. The safety PLC employs an existing SIL4 grade PLC product, for example, model HIMatrix F35.

The distributed platform door controller is realized based on a safety Programmable Logic Controller (PLC) adopting a redundancy-voting structure, has safe digital input and output and safety control capability based on a common industrial communication protocol, and has the safety integrity level of SIL 4.

And the DPSDC realizes safe communication with the WSC through the industrial Ethernet. A set of trackside controllers can control platform door systems of a plurality of stations through a plurality of sets of DPSDC simultaneously.

The DPSDC and the WSC realize communication by means of a DCS redundant network or an independent optical fiber redundant network, and hard-wire connection is not needed.

DPSDC can distribute and set up in each station, includes that equipment concentrates the station and the station is concentrated to non-equipment. Can be arranged in a signal machine room, a communication machine room or a platform door equipment room according to the requirement.

VOBC directly communicates with DPSDC of each station through a redundant vehicle-ground wireless communication network to realize platform door control.

In the DPSDC, a control logic processor 1 of a safety PLC, a safety industrial bus interface 2, a safety digital IO interface 3 and at least one Ethernet communication module 4 are respectively powered by two groups of mutually independent power supplies, and each power supply module 5 is provided with an independent breaker to realize short-circuit protection and avoid mutual influence. The whole DPSDC is supplied with power by a double-circuit power supply so as to avoid the influence of power failure on a DPSDC system.

The following two application modes can be adopted for the DPSDC according to needs.

(1) The platform door safety control system is directly butted with a PSC, and is butted with the PSC through industrial protocol communication and hard lines under the condition that a current PSC interface is not changed, so that the safety control of the platform door is realized, wherein the safety control comprises the steps of sending a door opening command and a door closing command, and acquiring the closing and locking states of a platform door bypass and a platform door. Meanwhile, the platform door alignment isolation control function is realized through an industrial protocol communication mode. As shown in fig. 2.

(2) And the DCU is directly driven by a hard wire and an industrial protocol communication mode. The method comprises the steps of realizing safety control of the platform door, including sending a door opening command and a door closing command, and acquiring the closing and locking states of a platform door bypass and the platform door; and alignment isolation is controllable. As shown in fig. 3.

The DPSDC can be compatible with other functions using hard-wired interface controls including, but not limited to, emergency stop buttons, personal protection switches, and automatic fold-back buttons. As shown in fig. 4.

The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.

Claims (6)

1. A distributed platform door controller, comprising:

the safety PLC comprises a logic control processor, a safety industrial bus interface and a safety digital IO interface;

at least one Ethernet communication module connected to the safety PLC; and

the power supply modules are respectively connected with a power supply and are respectively used for supplying power to the logic control processor, the safety industrial bus interface, the safety digital IO interface and each Ethernet communication module;

the Ethernet communication module is respectively communicated with the WSC and the VOBC;

the secure industrial bus interface is in communication with a PSC or DCU;

the secure digital IO interface communicates with a PSC or DCU.

2. The distributed station door controller of claim 1, wherein said secure industrial bus interface is connected to a PSC or DCU via an industrial bus;

the safe digital IO interface is connected with the PSC or the DCU through a hard wire.

3. The distributed platform door controller according to claim 1, wherein the secure digital IO interface is hardwired to hardware interface devices including but not limited to emergency stop buttons, personnel protection switches, and automatic fold-back buttons.

4. The distributed platform door controller of claim 1, wherein each power module is provided with an independent circuit breaker.

5. The distributed platform door controller of claim 1 wherein said power source is a two-way power source.

6. The distributed platform door controller of claim 1, wherein the ethernet communication module wirelessly communicates with the VOBC over a redundant vehicle-to-ground wireless communication network;

and the Ethernet communication module is communicated with the WSC through a DCS redundant network or an independent optical fiber redundant network.

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