KR20090062901A - Fault detection circuit of railroad signal controller - Google Patents

Abstract

A fault detection circuit of a railroad signal controller is provided to obtain reliability and stability of a system for transmitting a railroad signal by detecting self-faults of a first and second controllers. A fault detection circuit of a railroad signal controller includes a first controller(100) and a second controller(200). The first controller includes a first microprocessor(110), a first input/output unit(120,130,140), and a first fault detection unit(150). The microprocessor controls an input and an output of a railroad signal. The first input/output unit transmits operation monitoring information to or receives the operation monitoring information from the first microprocessor. The first fault detection unit determines a fault of the first input/output unit. The second controller includes a second microprocessor(210), a second input/output unit(220,230,240), and a second fault detection unit(250). The second microprocessor controls the input and the output of the railroad signal. The second input/output unit transmits the operation monitoring information to or receives the operation monitoring information from the first input/output unit of the first controller. The second fault detection unit determines a fault of the second input/output unit.

Description

Fault detection circuit of railroad signal dual system controller {fault detection circuit of railroad signal controller}

1 is a configuration diagram of inter-communication using a general dual system control device used in the field of railway signaling.

Figure 2 is a block diagram of a defect detection circuit of a general dual system control apparatus according to FIG.

Figure 3 is a timing diagram of the occurrence of a risk side failure of the entire dual-system controller due to the inter-communication fault of the general dual-system control apparatus according to FIG.

4 is a block diagram of a fault detection circuit for the inter-communication communication of the dual system control system for railway signals according to the present invention.

5 is a defect detection timing diagram of the inter-communication defect detection circuit of the dual system control system for railway signals according to the present invention.

*** Explanation of symbols for main parts of drawing ***

100: first controller 110: first microprocessor

120: first_1 communication controller 130: first_1 communication adapter

140: first_2 communication adapter 150: first defect detection unit

152: first_2 communication controller 154: first_3 communication adapter

156: first comparator 200: second controller

210: second microprocessor 220: second_1 communication controller

230: 2_1 communication adapter 240: 2_2 communication adapter

250: second defect detection unit 252: second_2 communication controller

254: second_3communication adapter 256: second comparator

The present invention relates to a quarterly communication defect detection circuit of a dual system control system for railway signals, and more specifically, to achieve reliability and safety of the system by suppressing and allowing defects occurring in a controller used in the railway signal field. The present invention relates to inter-communication fault detection circuit of dual system controller for railway signal.

In general, a railway is an important means of transporting people or goods by trains having a structure in which a plurality of cars or wagons are connected along a certain rail.

For the operation of such a railway, a large number of railway signals are transmitted and received to monitor or control the position, speed, inter-vehicle distance, braking, etc. of the train, and in particular, a microprocessor (micro processoir) and a micro controller (micro controller) are used. The embedded controller is in charge of the control that directly affects operational reliability and safety, such as train control and path control.

Therefore, the natural and stable monitoring and control of the railway through the transmission and reception of such a railway signal, it is natural that accurate information transmission and reception is necessary.

In particular, when the position information of the preceding train moving on the same track from the ground controller is transmitted to the vehicle controller of the following train with a defect due to noise, etc. during the transmission to the following train, between the preceding train and the following train. It may cause a crash, etc., and cause a large accident.

Therefore, since it is very important to determine whether there is a defect during transmission of the railway signal transmitted to the embedded controller, the controller is configured in a dual system structure to detect the failure of the railway signal embedded controller and ensure reliability and safety.

An example of a control device having such a dual system structure is shown in FIG. 1.

Referring to FIG. 1, in the conventional general control system having a dual system structure, a first controller A and a second controller B are input in parallel to an input C of a railway signal input from another controller.

At this time, due to the initial setting, the first controller A generates the railroad signal output E to the operating system, and the second controller B does not generate the output to the standby system. If a fault occurs in A), the second controller (B) generates the output (E) of the railroad signal to maintain the stability and accuracy of the dual system controller.

Therefore, when a fault occurs in the first controller A in the dual system structure consisting of the first controller A and the second controller B, the second controller B is a railway signal. In order to output (E), the second controller (B) should always monitor the presence or absence of the fault of the first controller (A), and the first controller (A) also has the fault of the second controller (B). Monitor the status.

To this end, the first controller A and the second controller B transmit and receive operation monitoring information to monitor each other for the presence of a defect of the counterpart controller, thereby performing intercommunication communication between the first controller A and the second controller B. This can be done by D).

The inter-communication communication between the first controller A and the second controller B is performed through the detailed circuit diagram as shown in FIG.

That is, according to FIG. 2, the first controller A includes the microprocessor 50, the serial communication controller 40, and the serial communication adapters 10 and 20, and the second controller B includes the microprocessor 60. And a serial communication controller 70 and serial communication adapters 30 and 80.

With this configuration, the operation state of the first controller A is transmitted to the second controller B through the serial communication adapter 30. Similarly, the first controller A operates the second controller B. The state is input through the serial communication adapter 10, and the input signal is transmitted to the data bus so that the microprocessor 50 can recognize the serial communication controller 40.

 Therefore, the principle of inter-communication communication of the control device having the dual system structure is that the first controller A is blocked by the self-test logic when a defect occurs in the first controller A, and the first controller A is blocked. As a result, no information is transmitted to the inter-terminal communication transmitted to the second controller B through the serial communication controller 40 and the serial communication adapter 20.

On the other hand, the second controller (B) receives the state of the first controller (A) through the serial communication adapter 30 is switched to the operating system that the second controller (B) generates the output (E).

With this arrangement, if the first controller A is a standby system and the second controller B is an operating system, if the second controller B has a fault, the first controller A is divided into quarters. Through the communication through the serial communication adapter 10 and the serial communication controller 40, the microprocessor 50 recognizes that a defect occurred in the second controller (B).

However, in this case, the second controller B operates normally, and even when a failure occurs in the serial communication adapter 10 or the serial communication controller 40 of the first controller A, the second controller B operates normally. ) Is incorrectly recognized as a failure, and the first-level controller A, which is the standby system, generates the railway signal output, the final output E of the dual-system controller is determined by the first and second controllers A and B. Since the output signal is synthesized and outputted, there is a problem in that an unpredictable dangerous operation is performed.

In this case, when the first controller A, which is operating as the standby system, recognizes a failure of the second controller B, the first controller A is switched to the operation system, thereby preventing the illegal output of the second controller B. As a result, a block signal is generated in the second controller (B), and the first controller (A) having a fault blocks the second controller (B) that was operating normally as an operating system, and as a result, the entire control device is blocked. There is also a problem that can occur.

That is, the railway signal processing that can be generated in such a case can be understood through a timing diagram as shown in FIG. 3.

According to this, when a defect occurs in the serial communication adapter 10, which is one element, the operation monitoring information input of the serial communication adapter 10 may be inputted to the defect of the serial communication adapter 10 even when a signal of '0x01' is input. An error may occur by '0x02', and the output of the serial communication controller 40 input to the microprocessor 50 due to such a defect is different from '0x02' different from '0x01' transmitted from the second controller B. This may cause an error.

On the other hand, when the serial communication controller 40 has a defect, even if the serial communication adapter 10 receives data normally, even if a signal of '0x03' is input to the serial communication controller 40, for example, the serial communication adapter 10 Error may occur due to a defect of '0x04', and the output of the serial communication controller 40 input to the microprocessor 50 may be different from that of the '0x03' transmitted from the second controller B. Another '0x04' may cause an error.

Therefore, if the error occurs in the serial communication adapter (10, 20) (30, 80) or the serial communication controller (40, 70) as described above in the inter-communication communication between the first controller (A) and the second controller (B) The problem that the controller A and the second controller B operate as the operating system at the same time, or that the output does not occur at the same time in the first controller A and the second controller B, may be exposed as it is. have.

Such a condition may cause a large delay in the railway signal field that uses a dual control system to control the interval or course of the train, and may cause a large accident such as a collision or derailment of the train.

Accordingly, the present invention has been made to solve such a problem, the object of the present invention is to provide a railway signal through the suppression and allowance of defects that may occur in the control system of a dual system that controls the transmission of railway signals in the field of railway signals In order to achieve the reliability and safety of the system for the transmission of the railroad signal system for providing a fault detection circuit for the inter-communication communication of the dual system control system.

In particular, the present invention, when a defect occurs in a specific controller constituting the control system of the dual-system structure, the defect of the existing single component with respect to the quarterly communication necessary to continuously maintain the function of the control device by excluding the controller having the defect Therefore, the present invention provides a fault detection circuit for the inter-communication communication of the dual system controller for railway signals that can analyze the factors in which the entire dual system controller operates as a dangerous side and can suppress such a phenomenon.

The present invention for achieving the above object;

A first controller comprising a first microprocessor controlling the input / output of the railway signal and a first input / output means for transmitting / receiving operation monitoring information, a second microprocessor controlling the input / output of the railway signal, and a first controller of the first controller. A dual system control system for railway signals, comprising a two-stage controller composed of second input-output means for transmitting and receiving intermittent operation monitoring information input and output from one input-output means;

The first defect detection unit for determining the presence or absence of the defect of the first input and output means is further provided, the second controller is characterized in that the second defect detection unit for determining the presence or absence of the defect of the second input and output means is further provided.

At this time, the first input and output means is connected to the first_1 communication controller for transmitting and receiving operation monitoring information with the first microprocessor, and the first_1 communication controller receives the operation monitoring information from the second input and output means of the second controller And a first second communication adapter connected to receive the first_1 communication adapter, and a first second communication adapter connected to the first_1 communication controller and connected to receive the operation monitoring information to the second controller.

The second input / output means may be connected to the second_1 communication controller for transmitting and receiving operation monitoring information with the second microprocessor and the second_1 communication controller to receive operation monitoring information from the first input / output means of the first controller. And a first second communication adapter connected to receive the second_1 communication adapter, and a first second communication adapter connected to the second_1 communication controller and connected to receive the operation monitoring information to the first controller.

On the other hand, the first defect detection unit detects whether the first_1 communication controller or the first_1 communication adapter is defective, and the second defect detection unit detects whether the second_1 communication controller or the second_1 communication adapter is defective. It features.

In this case, the first fault detection unit compares the normal or abnormal operation of the first_1 communication controller and the first_1 communication adapter and outputs a 'failure signal' to the first microprocessor of the first controller. And stop the operation by being inputted to the second controller to operate the second controller as an operating system, and wherein the second fault detection unit is normally or abnormally operated by the second_1 communication controller and the second_1 communication adapter. In case of abnormal operation, it outputs a 'fault signal' to the second microprocessor of the second controller to stop the operation, and transmits the first controller to operate the second controller as an operating system. It is done.

At this time, the first defect detection unit; A first_3 communication adapter connected to receive motion monitoring information from the second controller, a first_2 communication controller controlling motion monitoring information received through the first_3 communication adapter, and an operation monitoring output from the first_1 communication controller And a first comparator that compares the information with the motion monitoring information output from the first_2 communication controller and outputs a 'normal signal' when it does not match and outputs a 'failure signal' when it does not match.

The second defect detection unit; A second_3 communication adapter connected to receive operation monitoring information from the first controller, a second_2 communication controller for controlling operation monitoring information received through the second_3 communication adapter, and an operation monitoring output from the second_1 communication controller And a second comparator for comparing the information with the operation monitoring information output from the second_2 communication controller and outputting a 'normal signal' when the information is identical and outputting a 'failure signal' when the information does not match.

Hereinafter, the characteristics of the present invention will be understood by the embodiments described in detail with reference to the accompanying drawings.

At this time, Figure 4 is a block diagram of the fault detection circuit between the communication system of the dual signal control system for railroad signal according to the present invention, Figure 5 is a fault detection timing diagram of the inter-communication fault detection circuit of the dual system control system for railroad signal according to the present invention. .

First, according to FIG. 4, the inter-communication fault detection circuit of the dual system control system for railway signals according to the present invention transmits a railway signal for monitoring or controlling the position, speed, distance between vehicles, braking, etc. Through the suppression and allowance of defects that may occur in the dual system controller for controlling the transmission of railway signals that may occur at the time, the malfunction of the dual system controller is prevented.

Such a dual-system control apparatus according to the present invention processes the railway signal input or output from another external controller and outputs to another external controller. To this end, the present invention includes a first controller 100 and a second controller 200.

Hereinafter, each component constituting the present invention will be described in more detail.

First, the first controller 100 is a first microprocessor 110 for controlling to output to the output terminal (E) through the internal operation when the railway signal is input from an external controller, the first microprocessor 100 and the data A bus / address bus / control bus is connected to receive and transmit motion monitoring information from the first_1 communication controller 120 and the first_1 communication controller 120 to receive operation monitoring information from the second controller 200. A first first communication adapter 130 connected to receive the first first communication adapter, a first second communication adapter 140 connected to the first first communication controller 120, and connected to receive the operation monitoring information from the second controller 200; The first fault detection unit 150 determines whether there is a defect between the 1_1 communication controller 120 and the first_1 communication adapter 130.

In this case, the first_1 communication controller 120, the first_1 communication adapter 130, and the first_2 communication adapter 140 as first input / output means transmit and receive operation monitoring information with the second controller 200. .

On the other hand, when the first defect detection unit 150 operates abnormally by comparing the normal or abnormal operation of the first_1 communication controller 120 and the first_1 communication adapter 130, the first microprocessor 110 It will output a 'Fault signal' that can block the operation of the.

Of course, such a 'failure signal' is input to the first microprocessor 110 of the first controller 100 to stop the operation, and transmitted to the second controller 200 to operate the first controller 100. Stop and operate the second controller 200 as the operating system.

The first defect detection unit 150 is connected in parallel with the first_1 communication adapter 130 and the same as the first_3 communication adapter 154 connected to receive operation monitoring information from the second controller 200, and Operation monitoring information of the first and second communication controller 152 for controlling the operation monitoring information received through the first_3 communication adapter 154, the second controller 200 received by the first_1 communication controller 120 and the first The first comparator 156 which compares the operation monitoring information of the second controller 200 received by the 1_2 communication controller 152 and outputs a 'normal signal' if it does not match and outputs a 'failure signal' if it does not match. It is composed of

In this case, the first_1 and first_2 communication controllers 120 and 152 use a serial communication controller, and the first_1 and 1_2 communication adapters 130 and 140 and the first_2 communication controller are connected to the first_1 communication controller 120. The first_3 communication adapter 154 connected to 152 uses a serial communication adapter for transmitting information using a 422 or 485 communication protocol.

The operation monitoring information of the second controller 200 transmitted and received through the 1_1 and 1_3 communication adapters 130 and 154 is transmitted and received in the form of serial data, which is parallel data through the first and first communication controllers 120 and 152. Is converted into and input to the first microprocessor 110 and the first comparator 156.

Of course, the data for the operation monitoring information generated in the first microprocessor 110 is converted into serial data via the first_1 communication controller 120 and transmitted to the second controller 200 through the 1_2 communication adapter 140. do.

The first defect detection unit 150 may further include a 1_2 communication controller 152 to detect a defect in the first_1 communication controller 120, and further include a 1_3 communication adapter 154. As a result, when a defect occurs in the 1_1 communication adapter 130, the defect may be detected.

On the other hand, if the mismatch occurs by comparing the operation monitoring information of the last two controllers 200 generated in the first_1 and 1_2 communication controller (120,152) in the first comparator 156, 'failure signal' is generated, In this case, the operation of the first comparator 156 is performed to compare only the operation monitoring information of the first_1 and 1_2 communication controllers 120 and 152 on the data bus to which various elements are connected together in addition to the first and second communication controllers 120 and 152. Defects are detected by using the control buses of the first_1 and 1_2 communication controllers 120 and 152 controlled by the one microprocessor 110 as activation signals of the first comparator 156.

Next, the second controller 200 receives a railroad signal from an external controller in the same way as the first controller 100. For this purpose, the second microprocessor (200) controls the output to the output terminal (E) through an internal operation. 210, the second microprocessor 210 and the data bus / address bus / control bus is connected to the second_1 communication controller 220 for transmitting and receiving operation monitoring information, and the second_1 communication controller 220 is connected to And the second_1 communication adapter 230 connected to receive the operation monitoring information from the first controller 100 and the second_1 communication controller 220 to transmit the operation monitoring information to the first controller 200. The second_2 communication adapter 240 is connected to receive the second defect detection unit 250 to determine the presence or absence of the second_1 communication controller 220 and the second_1 communication adapter 230.

In this case, the second_1 communication controller 220, the second_1 communication adapter 230, and the second_2 communication adapter 240 are second input / output means, and transmit and receive operation monitoring information with the first controller 100. .

On the other hand, the second defect detection unit 250 compares the normal or abnormal operation of the 2_1 communication controller 220 and the 2_1 communication adapter 230, the 2_1 communication controller 220 or the 2_1 communication adapter When 230 is abnormally operated, it outputs a 'failure signal' that may stop the operation of the second microprocessor 210.

Of course, such a 'failure signal' is inputted to the second controller 200 to stop the operation or transmitted to the first controller 100 to stop the operation of the second controller 200 and the first controller 100 ) Will be operated as an operating system.

The second defect detection unit 250 is connected in parallel with the second_1 communication adapter 230 and the second_3 communication adapter 254 connected to receive the operation monitoring information from the first controller 100 in the same manner, and The second_2 communication controller 252 for controlling the operation monitoring information received through the second_3 communication adapter 254, the operation monitoring information of the first controller 100 received by the second_1 communication controller 220 and the first; The second comparator 256 which compares the operation monitoring information of the first controller 100 received by the 2_2 communication controller 252 and outputs a 'normal signal' if it does not match and outputs a 'failure signal' if it does not match. It is composed of

In this case, the 2_1 and 2_2 communication controllers 220 and 252 use a serial communication controller, and are connected to the 2_1 and 2_2 communication adapters 230 and 240 and the 2_2 communication controller connected to the 2_1 communication controller 220. The second_3 communication adapter 254 connected to 252 uses a serial communication adapter.

The operation monitoring information of the first controller 100 transmitted / received through the 2_1 and 2_3 communication adapters 230 and 254 is transmitted and received in the form of serial data, which is parallel data through the second and second communication controllers 220 and 252. Is converted into and input to the second microprocessor 210 and the second comparator 256.

Of course, the data for the operation monitoring information that is arithmetic processing in the second microprocessor 210 is converted into serial data via the 2_1 communication controller 220 is the first controller 100 through the 2_2 communication adapter 240 Is sent.

The second defect detection unit 250 may further include a second_2 communication controller 252 to detect a defect in the second_1 communication controller 220, and further include a 2_3 communication adapter 254. As a result, when a defect occurs in the 2_1 communication adapter 220, the defect may be detected.

On the other hand, when the mismatch occurs by comparing the railroad signal information of the final first controller 100 generated in the 2_1 and 2_2 communication controllers 220 and 252 in the second comparator 256, 'failure signal' is generated. In this case, the operation of the second comparator 256 may be performed by comparing the data of the second and second communication controllers 220 and 252 with each other in addition to the second and second communication controllers 220 and 252. Defects are detected by using the control buses of the 2_1 and 2_2 communication controllers 220 and 252 controlled by the processor 210 as the activation signals of the second comparator 256.

4 and 5 will be described in detail the operation example of the inter-communication defect detection circuit of the dual signal control system for railway signals according to the present invention.

First, when the first controller 100 is operated as an operating system due to the initial setting, and the second controller 200 is designed to operate as a standby system, the first controller 100 and the second controller 200 are initially set in the initial setting state. An external railway signal is input.

Of course, the initial setting of the first controller 100 operates as a standby system, the second controller 200 may be designed to operate as an operating system, and in this case, it is natural that the same operation, so the first controller below Only the case where 100 operates as an operating system and the second controller 200 operates as a standby system will be described.

Accordingly, the operation monitoring information generated by the first microprocessor 110 of the first controller 100 is converted into serial data through the first_1 communication controller 120 and the second controller through the first_2 communication adapter 130. The second microprocessor 210 and the second comparator 256 through the 2_1 and 2_3 communication adapters 230 and 254 and the 2_1 and 2_2 communication controllers 220 and 252. The operation monitoring information generated by the second microprocessor 210 is converted into serial data through the second_1 communication controller 220 and then the first_1 and 1_3 communication adapters of the first controller 100 through the second_2 communication adapter 240. It is transmitted to the first microprocessor 110 and the first comparator 156 through (130,154) and the first_1 and 1_2 communication controller (120,152).

Accordingly, the first comparator 156 compares the operation monitoring information of the second controller 200 passed through the first and first communication controllers 120 and 152 and outputs a 'normal signal' when they match. The microprocessor 110 is driven to output a railroad signal through the first controller 100.

On the other hand, the operation monitoring information of the second controller 200 that has passed through the first_1 and 1_2 communication controller 120, 152 due to an error occurred in the first_1 communication controller 120 or the first_2 communication adapter 130 of the first controller 100; In case of inconsistency, a 'fixed signal' is output to control the first microprocessor 110 not to output the railway signal through the first controller 100 to switch to the standby system.

On the other hand, the second controller 200 receives the operation monitoring information of the first controller 100, the second controller 200 is switched to the operating system for generating the output (E).

For example, as illustrated in FIG. 4, when a defect occurs in the first_1 communication adapter 130 of the first controller 100, the operation monitoring information input of the first_1 communication adapter 130 may be set as '0x01'. Even when a signal is input, an error may occur as '0x02' due to a defect of the first_1 communication adapter 130, and the input / output of the first_1 communication controller 120 input to the first microprocessor 110 may be 2 due to such a defect. An error may occur with '0x02' different from '0x01' transmitted from the system controller 200.

In this case, the signal of '0x02' of the first_1 communication controller 120 is input to the signal of '0x01' passing through the first_3 communication adapter 154 and the 1_2 communication controller 152 and the first comparator 156 accordingly. The first comparator 156 is determined to be inconsistent and outputs a 'failure signal' to cut off the first controller 100 and switch the second controller 200 to the operating system to allow the output E of the railway signal. .

On the other hand, when a defect occurs in the first_1 communication controller 120 of the first controller 100, the operation monitoring information input of the first_1 communication adapter 130 is an example even when a normal signal of '0x03' is input. An error may occur as '0x04' due to a defect of the 120, and the input / output of the first_1 communication controller 120 input to the first microprocessor 110 may be transmitted by the second controller 200 due to the defect. An error may occur with '0x04' different from '0x03'.

In this case, the signal of '0x04' of the first_1 communication controller 120 is input to the signal of '0x03' passing through the first_3 communication adapter 154 and the 1_2 communication controller 152 and the first comparator 156. Accordingly, the first comparator 156 determines that there is a mismatch and outputs a 'failure signal' to block the operation of the first controller 100 and switch the second controller 200 to the operating system to output the railroad signal output E. Allow it.

Therefore, the first or second controller (100,200) operating normally due to the input defect of the information received from the first or second controller (100,200) is recognized as a failure to eliminate the error that the entire system can operate to the dangerous side Therefore, it is possible to prevent the dangerous side failure that the operating system and the standby system generate output at the same time due to the occurrence of a defect.

Although the preferred embodiment of the present invention has been described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the scope of the present invention to be substantially equivalent to the embodiment of the present invention. Various modifications can be made by those skilled in the art without departing from the scope of the present invention.

As can be seen from the above description, according to the present invention, by detecting the defects of the first controller and the second controller constituting the dual system controller for controlling the transmission of railway signals, the defects generated in the dual system controller itself are detected. In order to achieve the reliability and safety of the system for the transmission of railway signals by suppressing it, if any one of the first controller or the second controller is defective, the controller that caused the defect is excluded so that the dual system is controlled by the defect of the existing single part. Analyzing the factors that cause the whole device to operate on the dangerous side and suppressing these phenomena has the effect of preventing the dangerous side failure that causes the operating system and the standby system to generate output simultaneously due to the defect.

Claims (9)

A first controller comprising a first microprocessor controlling the input / output of the railway signal and a first input / output means for transmitting / receiving operation monitoring information, a second microprocessor controlling the input / output of the railway signal, and a first controller of the first controller. A dual system control system for railway signals, comprising a two-stage controller composed of second input-output means for transmitting and receiving intermittent operation monitoring information input and output from one input-output means; The first fault detection unit for determining whether there is a defect of the first input and output means is further provided, and the second controller is further provided with a second defect detection unit for determining the presence or absence of the defect of the second input and output means. Inter-communication fault detection circuit of dual system controller. The method of claim 1, The first input and output means is connected to the first_1 communication controller for transmitting and receiving the operation monitoring information with the first microprocessor, the first_1 communication controller is connected to receive the operation monitoring information from the second input and output means of the second controller And a first second communication adapter connected to the first first communication controller and connected to the second controller to receive operation monitoring information. The method of claim 1, The second input and output means is connected to the second_1 communication controller for transmitting and receiving operation monitoring information with the second microprocessor, and the second_1 communication controller to receive the operation monitoring information from the first input and output means of the first controller Interfacial communication defect detection of a dual-system controller for railway signaling, comprising: a second_1 communication adapter; and a first_2 communication adapter connected to the second_1 communication controller and connected to receive operation monitoring information to the first controller; Circuit. The method of claim 2, The first fault detection unit detects the presence or absence of a defect of the first_1 communication controller or the first_1 communication adapter. The method of claim 4, wherein The first defect detection unit is input to the first microprocessor of the first controller by outputting a 'failure signal' when abnormally operated by comparing the normal or abnormal operation of the first_1 communication controller and the first_1 communication adapter. Intermittent communication fault detection circuit of the dual signal controller for railway signal, characterized in that the operation is stopped, and transmitted to the second controller to operate the second controller as an operation system. The method of claim 4, wherein the first defect detection unit; A first_3 communication adapter connected to receive motion monitoring information from the second controller, a first_2 communication controller controlling motion monitoring information received through the first_3 communication adapter, and an operation monitoring output from the first_1 communication controller And a first comparator that compares the information with the motion monitoring information output from the first_2 communication controller and outputs a 'normal signal' if it does not match and outputs a 'failure signal' if it does not match. Intermittent communication defect detection circuit of signal dual system controller. The method of claim 3, wherein The second fault detection unit detects the presence or absence of a defect of the second_1 communication controller or the second_1 communication adapter. The method of claim 7, wherein The second fault detection unit compares the normal or abnormal operation of the second_1 communication controller and the second_1 communication adapter and outputs a 'failure signal' to the second microprocessor of the second controller. Intermittent communication fault detection circuit of the dual-signal control device for railway signal, characterized in that the operation is stopped, and transmitted to the first controller to operate the second controller as an operating system. The method of claim 7, wherein the second defect detection unit; A second_3 communication adapter connected to receive operation monitoring information from the first controller, a second_2 communication controller for controlling operation monitoring information received through the second_3 communication adapter, and an operation monitoring output from the second_1 communication controller And a second comparator that compares the information with the motion monitoring information output from the second_2 communication controller and outputs a 'normal signal' if it does not match and outputs a 'fault signal' if it does not match. Intermittent communication defect detection circuit of signal dual system controller.

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