Interlocking redundant system single system output fault diagnosis method

Abstract

The invention discloses a single-system output fault diagnosis method for an interlocking redundant system, and the method comprises the steps: enabling all output lines with fuses to be connected with cables at a wiring terminal strip, and enabling all output lines with fuses to be connected to an input point of a PLC (Programmable Logic Controller); all inputs are connected in series through an internal ladder diagram, and the PLC monitors 24V analog voltage in real time, outputs a fuse normal working signal to an interlocking system, and then transmits the fuse normal working signal to an ATS train automatic monitoring system for display; if a certain path or several paths of output voltages are detected to be powered off, the PLC immediately cuts off a signal indicating normal work of the fuse, and after the interlocking system cannot collect the signal, an alarm is generated and sent to an ATS (automatic train monitoring system) for display; after seeing an alarm, an operator timely processes the alarm according to regulations, and meanwhile, the PLC outputs a signal to the local sound-light alarm module to give a sound alarm and a red light display alarm. According to the invention, the defect that real-time alarm cannot be given when a certain signal output line is broken or a fuse is broken can be overcome.

Description

Technical Field

[0001] The invention relates to the technical field of rail transportation, and in particular to a method for diagnosing single-system output faults of an interlocking redundant system. Background Art

[0002] At present, the interlocking subsystem of the rail transit signal system adopts an output redundancy mechanism to improve availability. That is, under normal circumstances, the two systems output signals at the same time. This can solve the problem that if there is only a single system output, when a fault occurs and the two systems switch, there will be a brief output interruption and affect the function. Therefore, the solution of dual-system simultaneous output is generally adopted.

[0003] However, the problem is that if a signal of one system cannot be output due to a line problem, and another system happens to fail at this time, then this signal will not be output, affecting the signal function. Currently, all fuses are manually checked regularly (such as once a year) with a multimeter for preventive maintenance.

[0004] The disadvantages are as follows:

[0005] Each equipment centralized station interlocking system has more than 100 output fuses. Manually checking with a multimeter is time-consuming and laborious, and is prone to omissions and errors.

[0006] When a fuse fails, there is no timely alarm and processing. When another system fails, both systems will be unable to output, affecting the signal function.

[0007] In view of the above problems, a single-system output fault diagnosis method for an interlocking redundant system is provided. Summary of the invention

[0008] The purpose of the present invention is to overcome the existing defects and provide a single-system output fault diagnosis method for an interlocking redundant system, which can solve the defect that a certain signal output line is broken or a fuse is broken and an alarm cannot be given in real time.

[0009] The technical solution to achieve the above purpose is:

[0010] A method for diagnosing a single-system output fault of an interlocking redundant system, comprising:

[0011] Step S1, all output lines with fuses are connected to the input points of the PLC programmable controller by cables at the terminal block;

[0012] Step S2, all inputs are connected in series through the internal ladder diagram, the PLC programmable controller monitors the 24V analog voltage in real time, and outputs a signal that the fuse is working properly to the interlocking system, and then transmits it to the ATS train automatic monitoring system for display;

[0013] Step S3, if it is detected that one or more output voltages are out of power, the PLC programmable controller immediately disconnects the signal of the normal working of the fuse, and when the interlocking system cannot collect the signal, an alarm is generated and sent to the ATS train automatic monitoring system for display;

[0014] Step S4, after seeing the alarm, the operator handles it promptly according to the regulations, and at the same time, the PLC programmable controller outputs a signal to the local sound and light alarm module to issue a sound alarm and a red light to display the alarm.

[0015] Preferably, it also includes:

[0016] Step S5, when the fuse fails, the relevant information will be recorded by the interlocking log server for storage and later review; the relevant information includes the status information and alarm information of the interlocking system.

[0017] Preferably, in step S1, the terminal block includes an interlocking A series 24V terminal block and a B series 24V terminal block, which are respectively powered by an external power supply panel, and then connected to the terminal block after the output of the watchdog module in the interlocking cabinet, and a hard wire is led out from the terminal fuse output end to the input point of the PLC programmable controller for 24V voltage monitoring.

[0018] Preferably, in step S1, each 24V terminal block includes 68 output terminals, and each output terminal is equipped with a 1A fuse.

[0019] Preferably, in step S2, all 24V voltage signals are connected and processed in series by ladder logic, and three 24V outputs are performed after processing. The first one is the working status signal of all fuses, which is output to the interlocking system; the second one outputs this signal to the buzzer alarm circuit of the local sound and light alarm module; and the third one outputs this signal to the light alarm circuit of the local sound and light alarm module.

[0020] Preferably, in step S2, the interlocking system connects all fuse working status signals from the PLC programmable controller to the system through an input board, performs internal processing, and sends them to the ATS train automatic monitoring system in real time via Ethernet.

[0021] Preferably, in step S3, when the ATS train automatic monitoring system receives a fault signal, it will be highlighted in the alarm information column in real time to alert the operator. After the operator sees the alarm information, he / she will handle it according to the relevant fault handling process.

[0022] Preferably, in step S4, the maintenance personnel searches for relevant faulty circuits or fuses according to the LED input indicator lights on the PLC programmable controller in combination with a point comparison table.

[0023] The beneficial effects of the present invention are as follows: the present invention is based on the 24V voltage monitoring method of the PLC programmable controller, and there is no need for regular manual inspection with a multimeter, which saves time and effort; after a line or fuse failure occurs, an alarm can be sent to the ATS train automatic monitoring system and the local sound and light alarm module in real time, and maintenance personnel can handle it in time; the operator can also find the relevant faulty line or fuse very quickly for repair according to the LED input indicator light on the PLC programmable controller and the point comparison table. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a flow chart of a method for diagnosing a single-system output fault of an interlocking redundant system of the present invention;

[0025] Figure 2 It is a structural diagram of the single-system output fault diagnosis method of the interlocking redundant system in the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Since each equipment concentration station needs to monitor a large number of fuse points, reaching 136, and the input and output points of the interlocking system itself are used for control area equipment, it is impossible to allocate a large number of points to monitor the fuse status on the line. Therefore, taking advantage of the fact that the PLC programmable controller can expand a large number of input points, a single-system output fault diagnosis method for an interlocking redundant system is provided.

[0029] like Figure 1 , 2 As shown, a method for diagnosing a single-system output fault of an interlocking redundant system includes:

[0030] Step S1, all output lines with fuses are connected in parallel at the terminal block and all are connected to the input points of the PLC programmable controller.

[0031] In the embodiment, the terminal blocks include an interlocking A series 24V terminal block and a B series 24V terminal block, which are respectively powered by an external power supply panel, and then connected to the terminal block after the output of the watchdog module in the interlocking cabinet, and a hard wire is led out from the terminal fuse output end to the input point of the PLC programmable controller for 24V voltage monitoring.

[0032] In the embodiment, each 24V terminal block includes 68 output terminals, and each output terminal is equipped with a 1A fuse.

[0033] Step S2, all inputs are connected in series through the internal ladder diagram, the PLC programmable controller monitors the 24V analog voltage in real time, and outputs a signal that the fuse is working properly to the interlocking system, and then transmits it to the ATS train automatic monitoring system for display.

[0034] In the embodiment, all 24V voltage signals are connected and processed in series by ladder logic. After processing, three 24V outputs are performed. The first one is the working status signal of all fuses, which is output to the interlocking system; the second one outputs this signal to the buzzer alarm circuit of the local sound and light alarm module; the third one outputs this signal to the light alarm circuit of the local sound and light alarm module.

[0035] In the embodiment, the interlocking system connects all fuse working status signals from the PLC programmable controller to the system through the input board, performs internal processing, and sends them to the ATS train automatic monitoring system in real time through Ethernet.

[0036] Step S3, if it is detected that one or several output voltages lose power, the PLC programmable controller immediately disconnects the signal of the normal working of the fuse. After the interlocking system cannot collect the signal, it will generate an alarm and send it to the ATS train automatic monitoring system for display.

[0037] In the embodiment, when the ATS train automatic monitoring system receives a fault signal, it will be highlighted in the alarm information column in real time to alert the operator. After the operator sees the alarm information, he will handle it according to the relevant fault handling process.

[0038] Step S4, after seeing the alarm, the operator handles it promptly according to the regulations. At the same time, the PLC programmable controller outputs a signal to the local sound and light alarm module to issue a sound alarm and a red light to display the alarm. Even if the ATS operator does not notice the alarm information on the interface, the inspection personnel can find it in time.

[0039] In the embodiment, the maintenance personnel check the LED input indicator lights on the PLC programmable controller. When they see that an LED indicator light is off, they look for the relevant faulty circuit or fuse in combination with the point comparison table to troubleshoot.

[0040] Step S5, when the fuse fails, the relevant information will be recorded by the interlocking log server for storage and later review; the relevant information includes the status information and alarm information of the interlocking system.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for diagnosing single-system output faults in an interlocking redundant system, characterized in that: include: Step S1, all output lines with fuses are connected to the input points of the PLC programmable controller by cables at the terminal block; Step S2, all inputs are connected in series through the internal ladder diagram, the PLC programmable controller monitors the 24V analog voltage in real time, and outputs a signal that the fuse is working properly to the interlocking system, and then transmits it to the ATS train automatic monitoring system for display; Step S3, if it is detected that one or more output voltages are out of power, the PLC programmable controller immediately disconnects the signal of the normal working of the fuse, and when the interlocking system cannot collect the signal, an alarm is generated and sent to the ATS train automatic monitoring system for display; Step S4, after seeing the alarm, the operator handles it promptly according to the regulations, and at the same time, the PLC programmable controller outputs a signal to the local sound and light alarm module to issue a sound alarm and a red light to display the alarm.

2. A method for diagnosing single-system output faults of an interlocking redundant system according to claim 1, characterized in that: Also includes: Step S5, when the fuse fails, the relevant information will be recorded by the interlocking log server for storage and subsequent review; the relevant information includes the status information and alarm information of the interlocking system.

3. A method for diagnosing single-system output faults of an interlocking redundant system according to claim 1, characterized in that: In step S1, the terminal blocks include interlocking A series 24V terminal blocks and B series 24V terminal blocks, which are powered by external power panels respectively, and then connected to the terminal blocks after being output by the watchdog module in the interlocking cabinet. A hard wire is then led out from the terminal fuse output end to the input point of the PLC programmable controller for 24V voltage monitoring.

4. A method for diagnosing single-system output faults of an interlocking redundant system according to claim 3, characterized in that: In step S1, each 24V terminal block includes 68 output terminals, and each output terminal is equipped with a 1A fuse.

5. A method for diagnosing single-system output faults of an interlocking redundant system according to claim 3, characterized in that: In step S2, all 24V voltage signals are connected and processed in series by ladder logic. After processing, three 24V outputs are performed. The first one is the working status signal of all fuses, which is output to the interlocking system; the second one outputs this signal to the buzzer alarm circuit of the local sound and light alarm module; and the third one outputs this signal to the light alarm circuit of the local sound and light alarm module.

6. A method for diagnosing single-system output faults in an interlocking redundant system according to claim 1, characterized in that: In step S2, the interlocking system connects all fuse working status signals from the PLC programmable controller to the system through the input board, performs internal processing, and sends them to the ATS train automatic monitoring system in real time through Ethernet.

7. A method for diagnosing single-system output faults in an interlocking redundant system according to claim 1, characterized in that: In step S3, when the ATS train automatic monitoring system receives a fault signal, it will highlight it in the alarm information column in real time to alert the operator. After the operator sees the alarm information, he will handle it according to the relevant fault handling process.

8. The method for diagnosing single-system output faults of an interlocking redundant system according to claim 1, characterized in that: In step S4, the maintenance personnel search for relevant faulty circuits or fuses according to the LED input indicator lights on the PLC programmable controller and the point comparison table.

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