KR20070048891A - Fail-safe switching apparatus on the railroad signal - Google Patents

Abstract

In the present invention, in configuring a dual system for transmitting station information related to the operation of a train from a station information transmission device (LDTS) installed at a site station to a central information transmission device (CDTS) in a fail-safe manner,

By configuring the fail-safe by applying a transfer module,

In the dual system, the dual system and the communication line can be duplicated to enable the dual system to perform stable operation, and the reverse information transmission device can operate correctly even in the case of a failure such as the failure of the reverse information transmission device or the malfunction of the function. The present invention relates to a fail-safe switching device for railway signals.

Reverse Information Transmitter, Fail-Safe, Central Information Transmitter, Transfer Module, Dual System, Signal

Description

Fail-safe Switching Apparatus on the Railroad Signal}

1 is a block diagram of a conventional fail-safe device

2 is a block diagram of a fail-safe device according to the present invention

3 is a detailed configuration diagram of the transfer card of FIG.

4 is a main processing circuit diagram of the transfer card of FIG.

5 is a control signal selection circuit diagram of the transfer card of FIG.

Fig. 6 is a circuit diagram of a 422 driver and protector of the transfer card of Fig. 3;

7 is an input (reception) processing system diagram of the transfer card of FIG.

8 is a flowchart of a system configuration and information of a general CTC

9 is a detailed configuration diagram of a general CTC

<Description of the symbols for the main parts of the drawings>

11, 12, 20, 21 Modem card 13, 14, 24, 25 CPU module (card)

15, 16 Insulation module (card) 17, 18, 28, 29 Electronic interlocking device

22, 23, 26, 27 Transfer Module (Card)

In the present invention, in configuring a dual system for transmitting station information related to the operation of a train from a station information transmission device (LDTS) installed at a site station to a central information transmission device (CDTS) in a fail-safe manner,

By configuring the fail-safe by applying a transfer module,

In the dual system, the dual system and the communication line can be duplicated to enable the dual system to perform stable operation, and the reverse information transmission device can operate correctly even in the case of a failure such as the failure of the reverse information transmission device or the malfunction of the function. The present invention relates to a fail-safe switching device for railway signals.

Technical background of the invention

A train intensive control (CTC) system is introduced to improve the technology related to the operation of trains, to automate the operation of trains, and to operate trains more quickly, accurately, safely and efficiently.

The CTC device is a train control device of the driving method in which the driver commander grasps all the train operation conditions in a certain area in one place and then controls the train path to instruct the engineer. This device is not only capable of direct control of each train, but also implements a technology that can efficiently control the flow of trains by grasping the operating status of trains as a whole.

The basic configuration of the CTC device and the flow of information thereof are shown in FIGS. 8 and 9.

That is, when the control information of the interlocking device installed in a certain section on the track is received by the inverse information transmitting device installed in the station, the control information of the received interlocking device is transmitted to the central information transmitting device, and the control information transmitted from each station. Is received by a central information transmission device composed of a group of reverse information transmission devices. The signal is analyzed by the main computer through a hub and sent to each command room and displayed on the display control panel in the command room.

The command room recognizes station information related to the operation of the train displayed on the display control panel, and again operates a display control panel to output a control signal for controlling the interlocking device to the processing device. The processing device receiving the control signal outputs a display signal for controlling trains in the field, and the display signal output from the processing device is in the reverse order of the flow of the control signal. It is transmitted to the interlock device on the site to control the operation of the train.

On the other hand, in order to ensure safe operation of the train, there should never be a disconnection of information between the station information transmission apparatus and the central information transmission apparatus. Accordingly, the station information transmission device secures the safe operation of the train by constructing a dual information transmission system and operating it in a fail-safe manner.

The configuration of the reverse information transmitting apparatus currently used is as shown in FIG.

To explain this, the reverse information transmission device is configured by dividing the first and second systems, respectively,

The composition of each world

Modems 11 and 12 connected to the upper CDTS and transmitting and receiving information (data) related to the operation of the train and signal processing (modulation and demodulation) thereof;

The CPU module 13 controls the operation of the system according to the signals transmitted and received through the modems 11 and 12, and monitors the operation state of the mutual system, and immediately switches to the standby CPU when an error occurs in the counterpart CPU module. 14);

An optical insulation module (15, 16) for performing a function of simply connecting or interrupting the flow of signals between an on-site interlock device and a central command room under the control of the CPU modules (13, 14);

Interlocking device that detects the operation status of the train in the field and transmits it to the CPU modules 13 and 14, and receives the control (or display) command of the command room through the CPU module to control the operation of the train or display the signal in the field (17 , 18); Is done.

Referring to the coupling relationship of the components,

First of all, the communication wiring between the first and second CPU modules 13 and 14 and the modems 11 and 12 is physically connected by hard wire (HARD-WIRED) to port 1 of the first CPU and port 2 of the second CPU. It is connected to the first modem (11). Similarly, the first CPU port 2 and the second CPU port 1 are connected to each other and connected to the second modem 12.

In addition, the interlocking devices 17 and 18 are connected to each other through the optical insulation modules 15 and 16.

In software, only one of the first and second CPUs becomes an online CPU, and the other is a standby.

The online CPU sends and receives data to and from the upper level CDTS 1 and 2, and the standby CPU monitors the operation status of the mutual system while only the standby CPU is configured to receive the data. If an error occurs in the counterpart CPU, the standby CPU immediately goes online to operate. Will continue.

However, in the conventional configuration as described above, if each other is recognized as an on-line CPU state due to an error caused by mutual monitoring between the two systems, both send data on the same line, which causes a data collision and causes a data error. do.

In addition, if a hardware problem occurs in the output communication port of one CPU physically, the influence may directly affect the output communication port of the other CPU, which may cause a failure in the normal communication function of the other CPU, and cause an error in the system itself. Because it makes it difficult to judge the system, it has many problems, such as detecting the exact error even if a system error occurs and failing to switch the system to the normal state and leaving the state of failure.

The present invention has been made to solve the above-mentioned problems of the prior art.

In other words, the present invention in the configuration of a dual system for transmitting the station information related to the operation of the train in the station information transmission device (LDTS) installed in the field station to the central information transmission device (CDTS) in a fail-safe manner, the Fail -Safe is configured by applying the transfer module,

In the dual system, the dual system and the communication line can be duplicated to enable the dual system to perform stable operation, and the reverse information transmission device can operate correctly even in the case of a failure such as the failure of the reverse information transmission device or the malfunction of the function. The purpose is to make it possible.

The configuration, coupling relationship and operation process of the present invention for achieving the above object will be described with reference to FIGS.

FIG. 2 is a configuration diagram of a fail-safe device according to the present invention, FIG. 3 is a detailed configuration diagram of the transfer card of FIG. 2, FIG. 4 is a main processing circuit diagram of the transfer card of FIG. 6 is a 422 driver and protector circuit diagram of the switching card of FIG. 6, and FIG. 7 is an input (reception) processing system diagram of the switching card of FIG.

First of all, the composition of the present invention is largely

After being connected to CDTS 1 and 2, the data transmitted from the CPU card is signal processed (modulated) and transmitted to the CDTS 1 and 2, or the control signal received from the CDTS 1 and 2 is signal processed (demodulated). 25) first and second modem cards 20 and 21 to be transmitted to;

After being installed between the first and second CPU cards 24 and 25 and the modem cards 20 and 21, only one of the two communication ports input from the first and second CPU modules 24 and 25 is input. Select and output to the first- and second-mode modems 20 and 21, and output the signals input from the first- and second-mode modems 20 and 21 to the first and second CPU modules 24 and 25. First and second first switching cards (modules) 22 and 23;

Processes the signals received from the transfer cards (modules) 22, 23, 26, 27, transmits and receives through the system selected online, and monitors the operating status of the partner CPU. First and second CPU cards (modules) 24 and 25 for generating a switching signal to the (modules) 22, 23, 26, and 27;

One of the two communication ports input from the first and second CPU modules 24 and 25 after being installed between the first and second CPU cards 24 and 25 and the electronic interlocking devices 28 and 29. Only one is selected and output to the first and second electronic interlock devices 28 and 29, and the signals input from the first and second electronic interlock devices 28 and 29 are the first and second CPU modules 24 and 25. 1st and 2nd second switching cards (modules) 26 and 27 for outputting both);

The first and second systems detect the operating status of the train in the field and transmit it to the command room through the CPU modules 24 and 25, and control the operation of the train or display signals in the field by receiving control commands from the command room through the CPU module. To electronic interlocks 28 and 29;

Characterized in that configured.

Each of the first transfer cards (modules) 22 and 23,

422 drivers (41, 42) connected to LDTS CPU channels of respective systems to receive data of 422 signals of each channel, and then convert them to TTL levels and connect them to unidirectional buffers;

Buffers 43 and 44 for outputting a signal received through the driver to the output side photocoupler 46 only one of two channels by an enable signal;

A photocoupler 46 which selects and outputs only a signal that is normally controlled and output according to the enable signal received through the buffer, and blocks external noise;

A 422 driver 48 for converting a signal received through the photocoupler into a 422 signal and outputting the signal to a modem card, while converting the signal received from the modem to a TTL level and outputting the signal to the NAND gate 47;

A NAND gate 47 variable output in accordance with the state of the signal received by the 422 drive 48;

A buffer (47a) for selectively blocking output of the signal input from the NAND gate (47) to the buffer (47a) according to an up-pass (S59) signal of a control signal selection circuit;

A photocoupler 45 for outputting all of the signals normally output according to the operation of the buffer to the 422 drivers 41 and 42;

Characterized in that configured.

Each of the second transfer cards (modules) 26 and 27 is configured in the same configuration as the first transfer card.

Next, the coupling relationship of the components will be described.

Between the first and second CPU cards 24 and 25 and the modems 20 and 21, the first and second transfer cards 22 and 23 are combined, and data is transferred through the transfer cards 22 and 23. The cards 20 and 21 are inputted.

In the communication connection, port # 1 of the first CPU card 24 and port # 2 of the second CPU card 25 are respectively input to the first transfer card 22, and similarly, the first CPU card 24 Port # 2 and port # 1 of the second CPU card 25 are input to the second transfer card 23, respectively.

Then, the control signals S11 and S22 of the first and second CPU cards 24 and 25 are input to the first and second transfer cards 22 and 23, and the on-line CPU card 24 is input by the control signals. 25) The communication port is selected so that the transfer function is performed so that data is transmitted to the modem cards 20 and 21.

On the other hand, the transmission and reception structures of the first and second transfer cards 22 and 23 are as shown in FIG.

First and second switching cards 22 and 23 are transmission lines TX + and TX- out of communication lines TX +, TX-, RX + and RX- that are inputted and output to first and second switching cards 22 and 23. Is configured to select and output only one of the two inputs by the control signal (81). On the contrary, the reception lines RX + and RX- are configured to transmit the same signal to two ports at the same time. (82)

Therefore, the first and second switching cards 22 and 23 are inputted from two communication ports inputted from the first and second CPU modules 24 and 25 to the first and second switching cards 22 and 23. Although only one is selected and output to the first and second modems 20 and 21, all signals inputted from the first and second modems 20 and 21 are sent to the first and second CPU modules 24 and 25. Will print.

3 is an internal block diagram of the first and second transfer cards 22 and 23, and FIG. 4 is a detailed circuit diagram of FIG. To explain this,

First, the first CPU card 24 port # 1 is connected to the LDTS CPU channel 1, and the port # 2 of the second CPU card 25 is connected to the LDTS CPU channel 2. The data of the connected channels are connected to the unidirectional buffers 43 and 44 through the 422 drivers 41 and 42, respectively.

The buffers 43 and 44 are configured to transmit an input to an output by an enable signal.

The input of two channels is 'high' by only the active_master or active_slave signal output by the control signal selection circuit shown in FIG. 5, so that only one channel is output through the buffer.

That is, when the first CPU 24 is online, only the active_master signal S56 becomes 'High' and the input of the first CPU communication port will be selected, and the second CPU 25 is online. If only the active_slave signal S57 becomes 'High', the input of the second CPU communication port is selected and transmitted to the photocoupler 46.

Here, if both signals (1st and 2nd) come online or vice versa, both the active_master signal (S56) and the active_slave signal (S57) are in the 'Low' state and the input signals of both channels are Is blocked in the buffers 43 and 44, so that false information due to a system error is not transmitted.

The signal normally controlled and output as described above operates the port coupler 46 (including external noise shielding due to the optical insulation function), and the signal is transmitted to the 422 driver 48 through the one-way buffer. The 422 driver 48 converts the signal into a 422 signal and outputs the 422 signal. The 422 signal output from the 422 driver 48 is input to the modem card 20 or 21.

On the contrary, the signal output from the modem card 20 or 21 and input to the 422 drive 48 is converted to the TTL level through the 422 driver 48 and outputted to the buffer through the NAND gate 47. do.

Here, if the up-pass (S59) signal of the control signal selection circuit shown in Fig. 5 is normal, the signal is 'High' and the signal is output to the buffer 47a. However, if the signal is abnormal (for example, 1st, 2nd) If both systems are online or vice versa), it becomes 'low' to block the signal in the buffer 47a. When the up-pass (S59) signal is 'high' by the normal state, the output of the buffer 47a is transferred to the photocoupler 45 to operate the port coupler 45. (Includes external noise shielding by optical insulation function)

The signal passing through the photocoupler 45 is again input to the 422 drivers 41 and 42 of both channels through the buffer 45a. That is, the signal output from the buffer 45a and input to the 422 drivers 41 and 42 is input to both channels without any judgment or selection, and the signal converted into the 422 signal from the 422 driver 41 and 42 is a CPU. It is inputted to the first 24 port # 1 and the second 25 port # 2.

The above description is the internal operation principle of the transfer cards 22 and 23. According to this principle, since the transfer of the two transfer cards 22 and 23 is performed at the same time, the first transfer card 22 is connected to the first CPU port # 1 and the second CPU port # 2, and the second transfer card 22 is connected to each other. The card 23 is configured to be connected to the first CPU port # 2 and the second CPU port # 1.

That is, the main function of the transfer cards 22 and 23 selects one of the two CPU ports and outputs it to the outside, and the input from the outside is transmitted to both CPU ports.

FIG. 5 is a control signal selection circuit diagram of the FIG. 3 switching card FSM. In more detail,

The control signal S11 of the first CPU card 24 is connected to the photocoupler 51, and the control signal S22 of the second CPU card 25 is connected to the photocoupler 52.

When there is no control of the CPU, the control signals S11 and S22 of the first and second systems are all in a 'high signal' state, and thus the photocoupler does not operate. Therefore, the photocouplers 53 and 54 are inverted. The output goes into the 'low signal' state. These signals are transmitted to the input of the gate 55 to output a 'low signal', which is transmitted to the inputs of the gates 56, 57 and 58 together with the photocoupler 53 and 54 output signals.

The output of the gate 56 is a 'low signal' (ACTIVE_MASTER) (S56) is output by both signals 'low signal', the output of the gate 57 is also output a 'low signal' (ACTIVE_SLAVE) (S57) In addition, the gate 59 for inputting the output signals of the gates 56 and 57 also outputs a 'low signal' UP_PASS.

In addition, the photocoupler 59-2 is operated by the 'low signal' output of the gate 59, and the output 'low signal' of the photocoupler 54 and the 'low' by the port coupler are operated at the input of the gate 58. Since the signal 'is input, the signal becomes a' low signal 'and outputs an error signal (S58).

That is, ACTIVE_MASTER (S56), ACTIVE_SLAVE (S57), and UP_PASS (S58) all become 'low signal' states, thereby blocking all signals of (ACTIVE_HIGH) by blocking the buffer 48 as shown in FIG.

This occurs when the first and second CPUs are all in the standby state or when the input is open because the input signal is not connected to the CPU. On the contrary, the ACTIVE_MASTER, ACTIVE_SLAVE, All UP_PASS goes 'low signal' and cuts off the signal. In other words, when a malfunction occurs in the dual system processing and both of them become an operating state, the signal is blocked to prevent the transmission of the wrong signal (data).

Normally, only one of the 1st and 2nd CPUs is in the operation status (online). For example, if the first CPU card 24 is online and the second CPU card 25 is in a standby state, only the first CPU outputs a low signal to operate the photocoupler (51), and this signal is connected to (56). It is input as 'high signal'. On the contrary, the photocoupler 52 does not operate and a low signal is input to 57. At the input of the EX-OR, the outputs of (53) and (54) are transmitted as inputs to output a 'high signal' state. This signal is transmitted to the inputs of (56) and (57) so that the 'high signal' is output at (56), and the 'low signal' state is output at (57) so that only the ACTIVE_MASTER becomes a high signal. By operating the buffer 43 of the first communication port signal is selected and output. Similarly, the output UP_PASS of 59 becomes a 'high signal' to operate the reception buffer so that reception is possible on both channels 41 and 42 of the CPU. In the opposite case, the same operation is performed to operate the second buffer 44 so that the second communication port signal is selected and output.

FIG. 6 is a circuit diagram of a 422 driver and protector of the switching card FSM of FIG. 3 so that a port output signal selected internally of the switching card is transmitted to the outside through the 422 driver. Photo coupler is used to insulate data signal and communication of each channel is configured by RS-422 method, and arrester is used as protection element for SURGE protection in communication line connected with interlocking device and CDTS.

In FIG. 2, the interface with the electronic interlocking devices 28 and 29 is similarly assigned to two CPU ports 24 and 25 of the respective systems, so that the CPU cards 24 and 25 and the electronic interlocking device 28 of FIG. , 29) between the transfer cards (26, 27) to receive the communication port (port # 3, port # 4) of the first and second CPU cards (24, 25) in the same manner as described above The communication port of the on-line system is selected by the control signal from the communication port input of the controller and is configured to be connected to the electronic interlocking device.

The detailed operation process by this configuration is as follows.

Electronic interlocking devices (28, 29) are installed in the station station signal machine room to receive the state of station site equipment (signals, trains, tracks) from the relay, collect the state data, and transfer the state data in accordance with the specified communication protocol. Transmit to reverse station through the device. Data transmitted from the electronic interlocking device is transferred to ports # 3 and # 4 of the CPU cards 24 and 25 through the port selected by the transfer cards 26 and 27. In the case where the first system is online here as an example, the data transmitted by the first electronic interlocking device 28 is transmitted to the first CPU 24 port # 3 and the second CPU port # 4 inside the transfer card. On the other hand, the data transmitted by the second electronic interlocking device 29 is processed by the first and second CPU cards 24 and 25, which have received this data through the transfer card, to internally process the status data, thereby providing an online CPU card. This status information is transmitted to the transfer cards 22 and 23, and the standby CPU card processes only internally and does not transmit externally.

The transfer cards 22 and 23 of each system transmit the transmission data transmitted from the CPU card to the modem cards 20 and 21, and modulates this data signal into an analog signal in the modem cards 20 and 21, thereby transmitting CDTS 1. Will be sent as 2.

According to the present invention as described above,

Due to the error of the system, either the online state or the standby state of both are not set, and only one of the first and second CPUs becomes an online CPU, and the other one becomes a standby form, thereby maintaining the basic functions of the dual system. It can be made without any abnormality.

In addition, this prevents the possibility of data collision due to the error of the system and prevents the transmission of the error data in advance, thereby preventing the misinformation from being transmitted, thereby improving the reliability of the system.

In addition, since the optical insulation logic and the surge protection circuit can be adopted, the effect of blocking noise and surge components from the outside can be expected.

Claims (5)

After connecting with the CDTS 1 and 2, the 1 data transmitted from the CPU card is signal processed (modulated) and transmitted to the CDTS 1 and 2, or the control signal received from the CDTS 1 and 2 is signal processed (demodulated) and the CPU card 24 First and second modem cards 20 and 21 to transmit to the 25; After being installed between the first and second CPU cards 24 and 25 and the modem cards 20 and 21, only one of the two communication ports input from the first and second CPU modules 24 and 25 is input. Select and output to the first- and second-mode modems 20 and 21, and output the signals input from the first- and second-mode modems 20 and 21 to the first and second CPU modules 24 and 25. First and second first switching cards (modules) 22 and 23; Processes the signals received from the transfer cards (modules) 22, 23, 26, and 27 of each system, transmits and receives them through the system selected online, and monitors the operation status of the counterpart CPU. First and second CPU cards (modules) 24 and 25 for generating a switching signal to the cards (modules) 22, 23, 26, and 27; One of the two communication ports input from the first and second CPU modules 24 and 25 after being installed between the first and second CPU cards 24 and 25 and the electronic interlocking devices 28 and 29. Only one is selected and output to the first and second electronic interlocking devices 28 and 29, and the signal input from the first and second electronic interlocking devices 28 and 29 is the first and second CPU modules 24 and 25. 1st and 2nd second switching cards (modules) 26 and 27 for outputting both); The first system detects the operation status of the train in the field and transmits the display information to the command room through the CPU modules 24 and 25, and receives the control command of the command room through the CPU module to control the operation of the train or display signals in the field. , To the second system interlocking device (28, 29); Failsafe switching device for railway signal, characterized in that the configuration The method of claim 1, Each of the first transfer cards (modules) 22 and 23, 422 drivers (41, 42) connected to LDTS CPU channels of respective systems to receive data of 422 signals of each channel, and then convert them to TTL levels and connect them to unidirectional buffers; Buffers 43 and 44 for outputting a signal received through the driver to the output side photocoupler 46 only one of two channels by an enable signal; A port coupler 46 which selects and outputs only a signal normally controlled and output according to the enable signal received through the buffer, and blocks external noise; A 422 driver 48 for converting a signal received through the photocoupler into a 422 signal and outputting the signal to a modem card, while converting the signal received from the modem to a TTL level and outputting the signal to the NAND gate 47; A NAND gate 47 variable output in accordance with the state of the signal received by the 422 drive 48; A buffer (47a) for selectively blocking the signal input from the NAND gate (47) to be output to the buffer (47a) according to an up-pass (S59) signal of a control signal selection circuit; A photocoupler 45 for outputting all of the signals normally output according to the operation of the buffer to the 422 drivers 41 and 42; Failsafe switching device for railway signal, characterized in that the configuration The method according to claim 1 or 2, The second transfer cards (modules) 26 and 27 of the respective systems have the same configuration as that of the first transfer card. The method according to any one of claims 1 to 3, Communication between each channel is a fail-safe switching device for railway signals, characterized in that the RS-422 configuration The method according to claim 1 or 3, The fail-safe switching device for railway signals, characterized in that the arrester is used as a protection element for surge protection in the communication line connected to the interlocking device and CDTS.

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