Monitoring and display device of the safety host of the logic operation layer of the integrated train control and interlocking system

Abstract

This utility model relates to the field of rail transit signaling, and particularly to a monitoring and display device for a safety host in the logic operation layer of an integrated train control and interlocking system. The device includes: a status display circuit connected to a first host and a second host, outputting status signals based on the actual operating status of the first and second hosts; multiple voltage detection circuits connected to a first external power supply of the first host and a second external power supply of the second host, outputting alarm signals when the actual voltage of either the first or second host exceeds a voltage threshold; and a display panel with multiple indicator lights connected to the multiple voltage detection circuits and the status display circuit, illuminating corresponding indicator lights based on alarm and status signals. This solves the problems of unintuitive status indication, the impact of external power supply voltage exceeding limits on system fault diagnosis, and the inconvenience of switching subsystem debugging and maintenance in related technologies.

Description

Technical Field

[0001] This utility model relates to the field of rail transit signaling, and in particular to a monitoring and display device for a safety host of the logic operation layer of an integrated train control and interlocking system. Background Technology

[0002] To improve the availability of the new TIS (Train Control and Interlocking Integration) system, a two-out-of-two architecture is adopted. In the safety host of the TIS logic layer, a primary / standby working mode is used, with one system in primary mode and the other as a backup; automatic switching between the two is achieved through a failover unit. If the primary functional module fails, the system can quickly switch to the standby module to continue operation, ensuring service continuity.

[0003] However, the current TIS system has several limitations and inconveniences. First, the numerous and closely spaced indicator lights for the security host's operating status, running status, and input / output status make it difficult to provide a clear and intuitive status display. The accompanying maintenance unit display is a portable design, usually stored in a cabinet, and must be pulled out when needed, which further limits the quick and intuitive judgment of the system's main and standby operating status and power supply status.

[0004] In addition, the main control cabinet housing the security host needs to be connected to four independent DC power supplies: two for the security host's logic power and two for the interface power acquisition. Although the presence and status of these power supplies can be confirmed on the cabinet's power module, when the externally supplied power voltage exceeds the normal range (too high or too low), prolonged operation of the system under these conditions will lead to an increased failure rate, reduced system availability, and hinder troubleshooting.

[0005] Finally, due to the lack of a hardware switching switch, during debugging, factory inspection and maintenance, the only way to check whether the working status of the safety host is normal is to switch the system by powering off one system. At the same time, it is impossible to directly display the main and standby operating status from the hardware level, which brings operational inconvenience to production and maintenance personnel. Utility Model Content

[0006] This utility model provides a monitoring and display device for the safety host of the logic operation layer of an integrated train control interlocking system, in order to solve problems such as the lack of intuitive technical status indication, the impact of excessive external power supply voltage on system fault diagnosis, and the inconvenience of switching subsystem debugging and maintenance.

[0007] The first aspect of this utility model provides a monitoring and display device for a safety host of the logic operation layer of a train control interlocking integrated system. The safety host of the logic operation layer of the train control interlocking integrated system includes a first host, a second host, a first external power supply for the first host, and a second external power supply for the second host. The monitoring and display device includes: a status display circuit connected to the first host and the second host, which outputs status signals based on the actual operating status of the first host and the second host; multiple voltage detection circuits connected to the first external power supply of the first host and the second external power supply of the second host, which output alarm signals when the actual voltage of the first host or the second host exceeds a voltage threshold; and a display panel with multiple indicator lights connected to the multiple voltage detection circuits and the status display circuit, which illuminate corresponding indicator lights based on alarm signals and status signals.

[0008] Optionally, the first external power supply includes a first logic power supply and a first interface power supply, and the second external power supply includes a second logic power supply and a second interface power supply.

[0009] Optionally, the status display circuit includes a first switch assembly and a second switch assembly, wherein one end of the first switch assembly is connected to a first logic power supply, a first relay and a second relay of the first host, and the other end of the first switch assembly is connected to an indicator light among a plurality of indicator lights that indicates the operating status of the first host; one end of the second switch assembly is connected to a second logic power supply, a third relay and a fourth relay of the second host, and the other end of the second switch assembly is connected to an indicator light among a plurality of indicator lights that indicates the operating status of the second host.

[0010] Optionally, the first switching assembly includes first to third relay switches, a first relay coil, and a second relay coil. The input terminals of the first to third relay switches are connected to any one of their output terminals. The input terminal of the first relay switch is connected to a first logic power supply. The first output terminal of the first relay switch is connected to the input terminal of the second relay switch. The second output terminal of the first relay switch is connected to the input terminal of the third relay switch. The first and second output terminals of the second relay switch are connected to the positive terminals of different indicator lights. The first output terminal of the third relay switch is connected to the positive terminal of an indicator light. The second output terminal of the third relay switch is in an idle state. The second and third relay switches are connected to different indicator lights, and the negative terminals of the indicator lights are connected to logic ground. One end of the first relay coil is connected to the first relay, and one end of the second relay coil is connected to the second relay. The other ends of both the first and second relay coils are connected to logic ground.

[0011] Optionally, the second switching assembly includes a fourth to a sixth relay switch, a third relay coil, and a fourth relay coil. The input terminals of the fourth to sixth relay switches are connected to any one of their output terminals. The input terminal of the fourth relay switch is connected to a first logic power supply. The first output terminal of the fourth relay switch is connected to the input terminal of the fifth relay switch. The second output terminal of the fourth relay switch is connected to the input terminal of the sixth relay switch. The first and second output terminals of the fifth relay switch are connected to the positive terminals of different indicator lights. The first output terminal of the sixth relay switch is connected to the positive terminal of an indicator light. The second output terminal of the sixth relay switch is in an idle state. The fifth and sixth relay switches are connected to different indicator lights, and the negative terminals of the indicator lights are connected to logic ground. One end of the third relay coil is connected to the fourth relay, and one end of the fourth relay coil is connected to the fourth relay. The other ends of both the third and fourth relay coils are connected to logic ground.

[0012] Optionally, the monitoring and display device of the safety host of the logic operation layer of the train control interlocking integrated system further includes: multiple power connectors, wherein the first external power supply and the second external power supply are connected to one end of the power connectors, and the other end of the power connectors is connected to the voltage detection circuit.

[0013] Optionally, multiple voltage detection circuits have the same structure. Each voltage detection circuit includes a first voltage divider circuit, a second voltage divider circuit, a reference voltage circuit, a protection circuit, a first voltage comparator, a second voltage comparator, a switching circuit, and first to third transistors. The power supply to be detected generates a reference voltage through the protection circuit and the reference voltage circuit. The reference voltage circuit is connected to the negative input terminal of the first voltage comparator and the positive input terminal of the second voltage comparator. The first voltage divider circuit is connected to the positive input terminal of the first voltage comparator, and the second voltage divider circuit is connected to the negative input terminal of the second voltage comparator. The output terminal of the first voltage comparator and the second voltage comparator are connected to the negative input terminal of the second voltage comparator. The output of the voltage comparator is connected to one end of the switching circuit, and the other end of the switching circuit is connected to the base of the first to third transistors. The collector of the first transistor is connected to the first operating power supply of the first host, and the emitter of the first transistor is connected to the status signal of the power supply to be detected. The collector of the second transistor is connected to the second operating power supply of the second host, and the emitter of the second transistor is connected to the status signal of the power supply to be detected. The collector of the third transistor is connected to the power supply to be detected, and the emitter of the third transistor is connected to the indicator light. Capacitors are provided at the input and output ends of the first and second voltage comparators and in the switching circuit to filter out interference signals.

[0014] Optionally, the power supply under test, the first operating power supply, and the second operating power supply are all optically isolated.

[0015] Optionally, the display panel is divided into a first to a third area. The first area is provided with an indicator light for the operation status of the first host and an indicator light for the first external power supply. The second area is provided with an indicator light for the operation status of the second host and an indicator light for the second external power supply. The third area is provided with a switch that switches the primary and secondary status of the first host and the second host.

[0016] Optionally, the monitoring and display device of the safety host of the logic operation layer of the train control interlocking integrated system also includes: a quick-connect terminal, one end of which is connected to multiple voltage detection circuits and status display circuits, and the other end of which is connected to multiple indicator lights.

[0017] Therefore, this utility model has at least the following beneficial effects:

[0018] This invention proposes a monitoring and display device for the safety host of the logic operation layer of an integrated train control interlocking system. The device outputs status signals based on the actual operating status of the first and second hosts through a status display circuit. Multiple voltage detection circuits output alarm signals when the actual voltage of either the first or second host exceeds a voltage threshold. Multiple indicator lights are displayed on the panel, illuminating corresponding lights based on the alarm and status signals. A switch is included to toggle between the primary and secondary hosts, clearly displaying the host's primary, backup, and offline operating status. The voltage detection circuits promptly detect voltage exceeding the threshold, improving system stability, and the switch allows for quick system switching. This solves problems such as unintuitive status indicators, external power supply voltage exceeding limits affecting system fault diagnosis, and inconvenience in debugging and maintaining switching subsystems.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 This is a schematic diagram of the monitoring and display device of the safety host of the logic operation layer of an integrated train control interlocking system according to an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the device panel and a PCB board structure diagram according to an embodiment of the present invention;

[0023] Figure 3This is a schematic diagram illustrating the implementation principle of displaying the primary, backup, and offline status of a security host according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram showing the connection relationship between the reversing unit, the first host, the second host, and the device according to an embodiment of the present invention;

[0025] Figure 5 This is a circuit diagram of a multi-channel independent voltage detection function according to an embodiment of the present invention. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0027] The following description, with reference to the accompanying drawings, describes a monitoring and display device for the safety host of the logic operation layer of an integrated train control interlocking system according to an embodiment of this utility model. Addressing the problems mentioned in the background art, such as unintuitive status indications, external power supply voltage exceeding limits affecting system fault diagnosis, and inconvenience in switching subsystem debugging and maintenance, this utility model provides a monitoring and display device for the safety host of the logic operation layer of an integrated train control interlocking system. In this device, a status display circuit outputs status signals based on the actual operating status of the first and second hosts. Multiple voltage detection circuits output alarm signals when the actual voltage of the first or second host exceeds a voltage threshold. Multiple indicator lights are set on the display panel, illuminating corresponding indicator lights based on the alarm and status signals. A switching switch is provided to switch the primary / standby status of the first and second hosts, achieving clear display of the host's primary, standby, and offline working status. The voltage detection circuit can promptly detect situations where the actual voltage exceeds the voltage threshold, making the system more stable. Furthermore, the switching switch allows for quick system switching. Thus, the problems of unintuitive status indications, external power supply voltage exceeding limits affecting system fault diagnosis, and inconvenience in switching subsystem debugging and maintenance mentioned in the background art are solved.

[0028] Specifically, Figure 1 This is a schematic diagram of the monitoring and display device of the safety host of the logic operation layer of an integrated train control interlocking system provided in an embodiment of the present invention.

[0029] like Figure 1As shown, the safety host of the logic operation layer of the train control interlocking integrated system includes a first host 101, a second host 102, a first external power supply 103 for the first host 101 and a second external power supply 104 for the second host 102. The monitoring and display device includes a status display circuit 105, multiple voltage detection circuits 106 and a display panel 107.

[0030] The status display circuit 105 is connected to the first host 101 and the second host 102, and outputs a status signal based on the actual operating status of the first host 101 and the second host 102; multiple voltage detection circuits 106 are connected to the first external power supply 103 of the first host 101 and the second external power supply 104 of the second host 102, and output an alarm signal when the actual voltage of the first external power supply 103 or the second external power supply 104 exceeds the voltage threshold; multiple indicator lights are provided on the display panel 107, and the multiple indicator lights are connected to the multiple voltage detection circuits 106 and the status display circuit 105, and the corresponding indicator light among the multiple indicator lights is lit based on the alarm signal and the status signal.

[0031] Among them, the first host 101 and the second host 102 are safety hosts, which are the core processing units of the train control interlocking integrated system. They are responsible for performing key safety-related tasks, such as determining the status of signal lights and the position of switches.

[0032] It is understood that this utility model embodiment includes a status display circuit 105 and multiple voltage detection circuits 106, which are designed to effectively monitor the operating status of the first host 101 and the second host 102 and the corresponding external power supply voltage. The status display circuit 105 is connected to the first host 101 and the second host 102 and outputs corresponding status signals according to their actual operating status. At the same time, the external power supply of each host is monitored by an independent voltage detection circuit 106. When the actual voltage of any external power supply exceeds a set threshold, an alarm signal is issued. Based on the received alarm signal and status signal, multiple indicator lights configured on the display panel 107 can be turned on or off, thereby intuitively reflecting the working status of the host and whether the power supply voltage is normal. This not only improves the monitorability and maintainability of the system, but also enables operators to quickly identify potential problems.

[0033] In this embodiment of the present invention, the first external power supply 103 includes a first logic power supply and a first interface power supply, and the second external power supply 104 includes a second logic power supply and a second interface power supply.

[0034] The first logic power supply and the first logic power supply provide power to the first host 101 and the second host 102, respectively. The interface power supply provides power to the acquisition device, which is a peripheral device that participates in data collection and preliminary processing, such as various sensors and actuators in the system.

[0035] It is understood that the first external power supply 103 and the second external power supply 104 in this embodiment of the present invention each include two types of power supplies, namely a logic power supply and an interface power supply, which are used to supply power to the security host and the acquisition device respectively, reduce interference between different circuits, and improve the stability and reliability of the entire system.

[0036] In this embodiment of the present invention, the status display circuit 105 includes a first switch assembly and a second switch assembly. One end of the first switch assembly is connected to a first logic power supply, a first relay and a second relay of the first host 101, and the other end of the first switch assembly is connected to an indicator light among a plurality of indicator lights that indicates the operating status of the first host 101. One end of the second switch assembly is connected to a second logic power supply, a third relay and a fourth relay of the second host 102, and the other end of the second switch assembly is connected to an indicator light among a plurality of indicator lights that indicates the operating status of the second host 102.

[0037] The first relay is the master status relay of the first host 101, used to output the master signal of the first host 101. The second relay is the normal status relay of the first host 101, used to output the normal signal of the first host 101. Similarly, the third relay is the master status relay of the second host 102, used to output the master signal of the second host 102. The fourth relay is the normal status relay of the second host 102, used to output the normal signal of the second host 102. Because the first relay and the third relay are interlocked, a mutually restrictive relationship is formed between the first host 101 and the second host 102, ensuring that only one host is in the master state at any given time.

[0038] It is understood that the status display circuit 105 of this embodiment of the present invention is composed of a first switch assembly and a second switch assembly. One end of the first switch assembly is connected to the first logic power supply and two relays of the first host 101, namely the first relay and the second relay, and the other end is connected to an indicator light that indicates the operating status of the first host 101, specifically for indicating the operating status of the first host 101. Similarly, one end of the second switch assembly is connected to the second logic power supply and the third and fourth relays of the second host 102, and the other end is connected to an indicator light that indicates the operating status of the second host 102. The first relay and the third relay are provided with an interlocking mechanism to ensure that the two relays are not activated at the same time, so that only one host of the first host 101 and the second host 102 is in the active state at the same time, thereby avoiding potential operational conflicts and ensuring accurate display of the working status of the first host 101 and the second host 102.

[0039] In this embodiment of the invention, the first switch assembly includes first to third relay switches, a first relay coil, and a second relay coil. The input terminals of the first to third relay switches are connected to any one of their output terminals. The input terminal of the first relay switch is connected to a first logic power supply. The first output terminal of the first relay switch is connected to the input terminal of the second relay switch. The second output terminal of the first relay switch is connected to the input terminal of the third relay switch. The first and second output terminals of the second relay switch are connected to the positive terminals of different indicator lights. The first output terminal of the third relay switch is connected to the positive terminal of an indicator light. The second output terminal of the third relay switch is in an idle state. The second and third relay switches are connected to different indicator lights, and the negative terminals of the indicator lights are connected to logic ground. One end of the first relay coil is connected to the first relay, and one end of the second relay coil is connected to the second relay. The other ends of both the first and second relay coils are connected to logic ground.

[0040] Among them, the first to the third relay switches are single-pole double-throw switches, and their input terminals can be connected to any one of their output terminals.

[0041] It is understood that the first switch assembly of this utility model embodiment consists of first to third relay switches, a first relay coil, and a second relay coil. The input terminal of the first relay switch is connected to a first logic power supply, its first output terminal is connected to the input terminal of the second relay switch, and its second output terminal is connected to the input terminal of the third relay switch. The two output terminals of the second relay switch are respectively connected to the positive terminals of different indicator lights to display specific status information. The first output terminal of the third relay switch is also connected to the positive terminal of an indicator light, and its second output terminal is unused. The negative terminal of each indicator light is connected to logic ground to ensure circuit integrity. In addition, one end of the first relay coil is connected to the first relay, one end of the second relay coil is connected to the second relay, and the other ends of both coils are connected to logic ground to form a current loop, thereby controlling the first to third relay switches. For example, when the first host 101 is in operation, both the first and second relays give signals, and both the first and second relay coils are energized, controlling the first to third relay switches to perform corresponding actions, causing the corresponding indicator lights indicating that the first host 101 is in operation to light up. This realizes the precise control of which indicator lights are lit through relay switches to intuitively reflect the system status.

[0042] In this embodiment of the invention, the second switching assembly includes a fourth to a sixth relay switch, a third relay coil, and a fourth relay coil. The input terminals of the fourth to sixth relay switches are connected to any one of their output terminals. The input terminal of the fourth relay switch is connected to a first logic power supply. The first output terminal of the fourth relay switch is connected to the input terminal of the fifth relay switch. The second output terminal of the fourth relay switch is connected to the input terminal of the sixth relay switch. The first and second output terminals of the fifth relay switch are connected to the positive terminals of different indicator lights. The first output terminal of the sixth relay switch is connected to the positive terminal of an indicator light. The second output terminal of the sixth relay switch is in an idle state. The fifth and sixth relay switches are connected to different indicator lights, and the negative terminals of the indicator lights are connected to logic ground. One end of the third relay coil is connected to the fourth relay, and one end of the fourth relay coil is connected to the fourth relay. The other ends of both the third and fourth relay coils are connected to logic ground.

[0043] Among them, the fourth to sixth relay switches are single-pole double-throw switches, and their input terminals can be connected to any one of their output terminals.

[0044] It is understood that the second switch assembly of this utility model embodiment includes a fourth to sixth relay switch, a third relay coil, and a fourth relay coil. Its connection structure is the same as that of the first switch assembly. It can realize the signal feedback from the third and fourth relays to the third and fourth relay coils, control the fourth to sixth relay switches, and realize the on / off of the corresponding indicator lights, thereby reflecting the working status of the second host 102. For example, when the second host 102 is in standby mode, the third relay does not output a signal, the fourth relay outputs a signal, the third relay coil is not energized, the fourth relay coil is energized, and control the fourth to sixth relay switches to perform corresponding actions, so that the corresponding indicator light indicating that the second host 102 is in standby mode lights up. This realizes the precise control of which indicator lights are lit through relay switches, so as to intuitively reflect the system status.

[0045] In this embodiment of the utility model, the monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system further includes: multiple power connectors, wherein the first external power supply 103 and the second external power supply 104 are connected to one end of the power connectors, and the other end of the power connectors is connected to the voltage detection circuit 106.

[0046] Each external power supply is connected to two power connectors, one for connecting to the logic power supply and the other for connecting to the interface power supply. The logic power supply and the interface power supply are connected to the voltage detection circuit 106 via the power connectors to enable real-time monitoring of the voltage of each logic power supply and the interface power supply.

[0047] It is understood that the present invention also includes multiple power connectors, through which the first logic power supply, the first interface power supply and the second logic power supply and the second interface power supply in the first external power supply 103 and the second external power supply 104 are respectively connected to their respective voltage detection circuits 106, so as to realize real-time monitoring of the voltage of each logic power supply and interface power supply, ensure that a stable and compliant voltage is provided to the system, and facilitate the monitoring and management of the power status.

[0048] In this embodiment of the invention, multiple voltage detection circuits 106 have the same structure. Each voltage detection circuit 106 includes a first voltage divider circuit, a second voltage divider circuit, a reference voltage circuit, a protection circuit, a first voltage comparator, a second voltage comparator, a switching circuit, and first to third transistors. The power supply to be detected generates a reference voltage through the protection circuit and the reference voltage circuit. The reference voltage circuit is connected to the negative input terminal of the first voltage comparator and the positive input terminal of the second voltage comparator. The first voltage divider circuit is connected to the positive input terminal of the first voltage comparator, and the second voltage divider circuit is connected to the negative input terminal of the second voltage comparator. The output terminal of the first voltage comparator and... The output of the second voltage comparator is connected to one end of the switching circuit, and the other end of the switching circuit is connected to the base of the first to third transistors. The collector of the first transistor is connected to the first operating power supply of the first host 101, and the emitter of the first transistor is connected to the status signal of the power supply to be detected. The collector of the second transistor is connected to the second operating power supply of the second host 102, and the emitter of the second transistor is connected to the status signal of the power supply to be detected. The collector of the third transistor is connected to the power supply to be detected, and the emitter of the third transistor is connected to an indicator light. Capacitors are provided in the input and output terminals of the first and second voltage comparators and in the switching circuit to filter out interference signals.

[0049] The circuit consists of two voltage dividers, one for each of the first and second voltage dividers, each composed of two resistors connected in series to achieve voltage division. The reference voltage circuit comprises a Zener diode and a resistor, which convert the voltage to be detected into a stable reference voltage through the voltage regulation characteristics of the Zener diode and the current limiting effect of the resistor. The protection circuit consists of a fuse, a reverse connection protection diode, and a TVS (Transient Voltage Suppressor). The fuse provides overcurrent protection, the reverse connection protection diode prevents reverse connection of the power supply, and the TVS provides overvoltage protection. The first and second voltage comparators compare the reference voltage with the voltage proportional to the voltage to be detected generated by the voltage divider circuit and provide corresponding output signals. The switching circuit consists of a MOSFET and several resistors. The resistors limit the current, and the outputs of the first and second comparators control the switching on and off of the MOSFET. Optical isolation is achieved through the first to third transistors. The details will be described in detail below and will not be repeated here.

[0050] It should be noted that in this embodiment of the invention, the resistance values ​​of the resistors in the first and second voltage divider circuits are set according to the alarm threshold of the voltage to be detected and the magnitude of the reference voltage. The alarm threshold is specifically set according to actual needs and is not specifically limited here. For example, if the reference voltage is set to 3V and the alarm threshold to 20%, meaning that an alarm is triggered when the voltage to be detected increases or decreases by 20%, then the resistance of the first voltage divider circuit is adjusted so that the voltage divided by the second voltage divider circuit when the voltage is normal is 3.75V, and the resistance of the second voltage divider circuit is adjusted so that the voltage divided by the second voltage divider circuit when the voltage is normal is 2.5V. When the voltage to be detected passes through the first... If the voltage from the voltage divider circuit drops from 3.75V to 3V, a drop of 20%, it indicates that the voltage to be detected has also dropped by 20%. At this point, the voltage output from the first voltage divider circuit is the same as the reference voltage, and the first comparator issues an alarm signal. Similarly, when the voltage to be detected rises from 2.5V to 3V through the second voltage divider circuit, a rise of 20%, it indicates that the voltage rise of the voltage to be detected has also reached 20%. At this point, the voltage output from the second voltage divider circuit is the same as the reference voltage, and the second comparator issues an alarm signal. This achieves voltage over-limit alarm according to the set alarm threshold of the voltage to be detected.

[0051] It is understood that the voltage detection circuit 106 of this embodiment consists of a first voltage divider circuit, a second voltage divider circuit, a reference voltage circuit, a protection circuit, first and second voltage comparators, a switching circuit, and first to third transistors. The power supply to be detected first passes through the protection circuit to ensure its safety before entering the reference voltage circuit to generate a stable reference voltage. The reference voltage is connected to the negative input terminal of the first voltage comparator and the positive input terminal of the second voltage comparator as a reference. At the same time, the first voltage divider circuit provides a voltage proportional to the voltage to be detected to the positive input terminal of the first voltage comparator, and the second voltage divider circuit provides another voltage proportional to the voltage to be detected to the negative input terminal of the second voltage comparator. Two voltage comparators compare the voltages at their respective input terminals and output signals to control a switching circuit based on the comparison results. The switching circuit then controls the states of the first to third transistors. Specifically, the first transistor controls the first operating power supply of the first host 101 and feeds back the status signal of the power supply to be detected through its emitter; the second transistor controls the second operating power supply of the second host 102 and similarly feeds back the status signal; the third transistor is connected to the power supply to be detected through its collector and controls an indicator light to display the status through its emitter. In addition, multiple capacitors are set at the input and output terminals of the voltage comparators and in the switching circuit to filter out interference signals, avoid false alarms caused by high-frequency interference signals and surges, and ensure the stability and reliability of the entire circuit.

[0052] In this embodiment of the invention, the power supply under test, the first working power supply, and the second working power supply are all optically isolated.

[0053] Optical isolation, also known as optocoupler or optical isolation, is a technology that uses light as a medium to transmit electrical signals. It can electrically isolate two circuits. Specifically, optical isolation works by applying an electrical signal to the input terminal of a light-emitting device, causing the device to emit light. The emitted light is received by a photosensitive device encapsulated in the same component and converted back into an electrical signal. Since there is no direct electrical connection between the light-emitting device and the photosensitive device, electrical isolation is achieved. When the voltage to be detected is normal, the MOSFET is turned on, and the indicator light is on. When the voltage to be detected exceeds the limit, the MOSFET is turned off, the optical isolation is turned off, and the indicator light is off, thus realizing voltage detection.

[0054] It is understood that the present invention applies optocoupler isolation technology in the power supply under test, the first working power supply and the second working power supply, which can control the electrical independence between each power supply, and can also be turned on when needed, thus maintaining system stability and enhancing anti-interference capability.

[0055] In this embodiment of the utility model, the display panel 107 is divided into a first to a third area. The first area is provided with an indicator light for indicating the operating status of the first host 101 and an indicator light for the first external power supply 103. The second area is provided with an indicator light for indicating the operating status of the second host 102 and an indicator light for the second external power supply 104. The third area is provided with a switch that switches the host 101 and the host 102 between their primary and standby states.

[0056] It is understood that the display panel 107 of this utility model embodiment is divided into first to third areas, each area having a specific function. The first area is equipped with an indicator light indicating the operating status of the first host 101 and an indicator light indicating the working status of the first external power supply 103, for monitoring the status of the first host 101 and its external power supply. The second area is equipped with an indicator light indicating the operating status of the second host 102 and an indicator light indicating the working status of the second external power supply 104, for monitoring the status of the second host 102 and its external power supply. The third area is equipped with a switch, which can be used to change the primary / standby status between the first host 101 and the second host 102, i.e., to switch which host is in the primary working mode and which is in the standby mode. This layout facilitates intuitive monitoring of the two hosts and their power supply status, and provides a convenient way to adjust their working status.

[0057] In this embodiment of the utility model, the monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system further includes: a quick-connect terminal, one end of which is connected to multiple voltage detection circuits 106 and status display circuits 105, and the other end of which is connected to multiple indicator lights.

[0058] Quick-connect terminals are components used for electrical connections, allowing for quick and easy connection and disconnection of wires to improve work efficiency and convenience.

[0059] It is understood that this utility model embodiment also includes quick-connect terminals. One end of the quick-connect terminals is connected to multiple voltage detection circuits 106 and status display circuits 105, and the other end is connected to multiple indicator lights. The indicator lights are controlled by status signals and alarm signals to intuitively display the working status of each part, such as whether the power supply is normal and the operating status of the two main units. By using quick-connect terminals, the voltage detection circuits 106 and status display circuits 105 and indicator lights can be quickly connected and disconnected, which not only simplifies the installation and maintenance process, but also improves the reliability and flexibility of the system.

[0060] The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system proposed in this utility model embodiment outputs status signals based on the actual operating status of the first host and the second host through the status display circuit. Through multiple voltage detection circuits, an alarm signal is output when the actual voltage of the first host or the second host exceeds the voltage threshold. Multiple indicator lights are set on the display panel, and the corresponding indicator lights are lit based on the alarm signal and the status signal. A switching switch is set to switch the main and standby status of the first host and the second host, realizing a clear display of the host's main, standby, and offline working status. The voltage detection circuit can detect the actual voltage exceeding the voltage threshold in a timely manner, making the system more stable. The switching switch can quickly complete the system switching function.

[0061] The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system will be further described below through a specific embodiment.

[0062] This embodiment proposes a power supply detection and main / standby operation status display device for an integrated train control interlocking system, such as... Figure 2 The diagram shown is a schematic diagram of the device panel and a PCB board structure diagram provided in this embodiment. This device can achieve the following three functions:

[0063] 1. Displays the primary, standby, and offline status of the two systems' main units.

[0064] like Figure 3 As shown, the first host and the second host realize the main standby state switching function through the switching unit. In this embodiment, the working status of the two systems is determined by collecting the status of the four relay contacts inside the switching unit, and the status is displayed on the device panel through hardware circuit.

[0065] This embodiment uses two signals, one for primary status and one for standby status, to control two levels of relays, thereby displaying the three states of the security host: primary, standby, or offline.

[0066] Figure 3 This is a schematic diagram illustrating the implementation principle of the main, standby, and offline status display of a security host according to an embodiment of the present invention. In this diagram, K1_1 is the first relay switch, K2_1 is the second relay switch, K2_2 is the third relay switch, K3_1 is the fourth relay switch, K4_1 is the fifth relay switch, K4_2 is the sixth relay switch, L1 is the first relay coil, L2 is the second relay coil, L3 is the third relay coil, and L4 is the fourth relay coil.

[0067] Taking the first host as an example, such as Figure 3 As shown, the first relay coil L1 and the second relay coil L2 of the first host in the reverse unit control the first relay coil L1 and the second relay coil L2, thereby controlling the first relay switch K1_1, the second relay switch K2_1 and the third relay switch K2_2, so as to realize the function of accurately displaying the host main, standby and offline status of the first host.

[0068] When the first host is in use, the "first host normal signal" is high and the "first host master signal" is high. The first relay coil L1 and the second relay coil L2 are energized. The first relay switch K1_1, the second relay switch K2_1, and the third relay switch K2_2 are activated, and the master light illuminates.

[0069] When the primary host is in standby mode, the "Primary Host Normal Signal" is high, the "Primary Host Primary Signal" is low, the second relay coil L2 is energized, the first relay coil L1 is de-energized, the first relay switch K1_1 does not operate, the second relay switch K2_1 and the third relay switch K2_2 operate, and the hot standby indicator light illuminates.

[0070] When the first host is offline, the "first host normal signal" is low, the "first host main signal" is low, the second relay coil L2 is not energized, the first relay coil L1 is not energized, the first relay switch K1_1, the second relay switch K2_1, and the third relay switch K2_2 do not operate, and the offline light is on.

[0071] This device requires no external power supply; it only needs to use a power supply unit for switching off, thus enabling a clear display of the host's main, standby, and offline working status.

[0072] It should be noted that there is no connecting cable between the two security hosts in this embodiment, and this embodiment itself does not affect the independence between the two systems.

[0073] 2. The device provides multiple independent voltage detection functions. If the voltage exceeds the threshold, the light will turn off and a voltage error signal will be reported to the safety host.

[0074] The main control cabinet housing the first and second main units receives four independent DC power supplies from the outside: two logic power supplies for the first and second main units, and two interface power supplies for data acquisition. In this embodiment, the externally connected power supplies provide four independent power detection circuits with configurable alarm thresholds. Within the threshold range, the indicator light illuminates; exceeding the threshold range, the indicator light goes out. The power voltage status signal is sent to the first and second main units via a switching unit. If the power voltage exceeds the threshold, the first and second main units receive an external power voltage alarm signal, which can be displayed on the maintenance unit, prompting maintenance personnel to inspect and repair the external power supply.

[0075] like Figure 4 This device has four sets of power supply voltage detection circuits, which are independent of each other and operate on the same principle. The device provides connectors for four power supplies; simply connect the power supply to be detected to the connector. The system typically uses 24V power. Taking the first channel as an example... Figure 5 As shown, R1 and R2 form the first voltage divider circuit, and R3 and R4 form the second voltage divider circuit. V1 and GND1 are the power supplies to be detected. This power supply is connected to the power connector. After passing through the protection circuit, V1 generates a 3V reference voltage via a reference voltage circuit. This 3V reference voltage is connected to the positive and negative input terminals of the first and second comparators, respectively. The other input voltage of the two comparators is generated by dividing V1 through the first and second voltage divider circuits. Since the voltage divided by the resistors changes proportionally to V1, the divided voltage can be compared with the reference voltage of 3V using the two comparators. When the divided voltage rises to or falls below 3V, the comparator output changes, thus generating an alarm signal. If an alarm is triggered and the indicator light turns off when the input voltage decreases or increases by 20%, then when the input voltage is normal, the first voltage divider circuit (R1 and R2) generates 3.75V, and the second voltage divider circuit (R3 and R4) generates 2.5V. The voltage divided by R1 and R2 is connected to the positive input of the comparator, and the voltage divided by R3 and R4 is connected to the negative input of the comparator. When the 3.75V voltage from R1 and R2 drops to 3V (a 20% drop), the voltage drop in V1 is also 20%. When the 2.5V voltage from R3 and R4 rises to 3V (a 20% increase), the voltage rise in V1 is also 20%.

[0076] The protection circuit includes overcurrent protection and overvoltage protection circuits. Figure 5 The medium voltage detection circuit is not shown in the diagram; its specific structure is as follows: Figure 5 The protection circuit is shown.

[0077] It should be noted that capacitors are installed on the input pins and output pins of the first and second comparators, as well as on the MOSFET outputs of the switching circuit, to filter out high-frequency signals and avoid false alarms caused by high-frequency interference signals and surges.

[0078] Figure 5 The three power supplies—the power supply under test V1 (GND1), the first host operating power supply VccI (GNDI), and the second host operating power supply VccII (GNDII)—are all optocoupled and are independent of each other. Similarly, the four independent power supply voltage detection circuits are independent of the six power supplies (first host operating power supply, second host operating power supply, etc.) in this embodiment.

[0079] 3. The device panel provides a two-way reset switch to switch the primary status of the first and second main units.

[0080] When the second host is in primary mode and the switch is turned towards the first host, after the first and second hosts receive the switch signal, the second host initiates a primary / standby switch, the first host becomes the primary host, and the second host becomes the standby host. Thus, the system switching operation is simplified by manually switching the system, which facilitates production and maintenance.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of the present invention pertain.

[0083] It should be understood that the various parts of this utility model can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0084] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

Claims

1. A monitoring and display device for a safety host of the logic operation layer of a train control interlocking integrated system, characterized in that, The train control interlocking integrated system's logic operation layer safety host includes a first host, a second host, a first external power supply for the first host, and a second external power supply for the second host. The monitoring and display device includes: A status display circuit is connected to the first host and the second host, and outputs a status signal based on the actual operating status of the first host and the second host. Multiple voltage detection circuits are connected to the first external power supply of the first host and the second external power supply of the second host, and output an alarm signal when the actual voltage of the first external power supply or the second external power supply exceeds the voltage threshold. The display panel has multiple indicator lights, which are connected to multiple voltage detection circuits and the status display circuit. The corresponding indicator light is lit based on the alarm signal and the status signal.

2. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 1, characterized in that, The first external power supply includes a first logic power supply and a first interface power supply, and the second external power supply includes a second logic power supply and a second interface power supply.

3. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 2, characterized in that, The status display circuit includes a first switching component and a second switching component, wherein... One end of the first switch assembly is connected to the first logic power supply, the first relay and the second relay of the first host, and the other end of the first switch assembly is connected to the indicator light among the plurality of indicator lights that indicates the operating status of the first host. One end of the second switch assembly is connected to the second logic power supply, the third relay and the fourth relay of the second host, and the other end of the second switch assembly is connected to the indicator light among the plurality of indicator lights that indicates the operating status of the second host.

4. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 3, characterized in that, The first switching assembly includes first to third relay switches, a first relay coil, and a second relay coil, wherein, The input terminals of the first to third relay switches are connected to any one of the output terminals. The input terminal of the first relay switch is connected to the first logic power supply. The first output terminal of the first relay switch is connected to the input terminal of the second relay switch. The second output terminal of the first relay switch is connected to the input terminal of the third relay switch. The first and second output terminals of the second relay switch are connected to the positive terminals of different indicator lights. The first output terminal of the third relay switch is connected to the positive terminal of an indicator light. The second output terminal of the third relay switch is in an idle state. The second and third relay switches are connected to different indicator lights, and the negative terminals of the indicator lights are connected to logic ground. One end of the first relay coil is connected to the first relay, one end of the second relay coil is connected to the second relay, and the other ends of the first relay coil and the second relay coil are both logically connected to ground.

5. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 3, characterized in that, The second switching assembly includes fourth to sixth relay switches, a third relay coil, and a fourth relay coil, wherein, The input terminals of the fourth to sixth relay switches are connected to any one of the output terminals. The input terminal of the fourth relay switch is connected to the first logic power supply. The first output terminal of the fourth relay switch is connected to the input terminal of the fifth relay switch. The second output terminal of the fourth relay switch is connected to the input terminal of the sixth relay switch. The first and second output terminals of the fifth relay switch are connected to the positive terminals of different indicator lights. The first output terminal of the sixth relay switch is connected to the positive terminal of an indicator light. The second output terminal of the sixth relay switch is in an idle state. The fifth and sixth relay switches are connected to different indicator lights, and the negative terminals of the indicator lights are connected to logic ground. One end of the third relay coil is connected to the fourth relay, one end of the fourth relay coil is connected to the fourth relay, and the other ends of the third relay coil and the fourth relay coil are both logically connected.

6. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 2, characterized in that, Also includes: Multiple power connectors are provided, wherein the first external power supply and the second external power supply are connected to one end of the power connector, and the other end of the power connector is connected to the voltage detection circuit.

7. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 1, characterized in that, The plurality of voltage detection circuits have the same structure, wherein each voltage detection circuit includes a first voltage divider circuit, a second voltage divider circuit, a reference voltage circuit, a protection circuit, a first voltage comparator, a second voltage comparator, a switching circuit, and first to third transistors. The power supply under test is connected to the reference voltage circuit via a protection circuit to generate a reference voltage. The reference voltage circuit is connected to the negative input terminal of the first voltage comparator and the positive input terminal of the second voltage comparator. The first voltage divider circuit is connected to the positive input terminal of the first voltage comparator, and the second voltage divider circuit is connected to the negative input terminal of the second voltage comparator. The output terminals of the first and second voltage comparators are connected to one end of the switching circuit, and the other end of the switching circuit is connected to the base of the first to third transistors. The collector of the first transistor is connected to the first operating power supply of the first host, and the emitter of the first transistor is connected to the status signal of the power supply under test. The collector of the second transistor is connected to the second operating power supply of the second host, and the emitter of the second transistor is connected to the status signal of the power supply under test. The collector of the third transistor is connected to the power supply under test, and the emitter of the third transistor is connected to an indicator light. Capacitors are provided in the input and output terminals of the first and second voltage comparators and in the switching circuit to filter out interference signals.

8. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 7, characterized in that, The power supply under test, the first operating power supply, and the second operating power supply are all optically isolated.

9. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 1, characterized in that, The display panel is divided into a first to a third area. The first area is provided with an indicator light that indicates the operating status of the first host and an indicator light that indicates the first external power supply. The second area is provided with an indicator light that indicates the operating status of the second host and an indicator light that indicates the second external power supply. The third area is provided with a switch that switches the primary and backup status of the first host and the second host.

10. The monitoring and display device of the safety host of the logic operation layer of the integrated train control interlocking system according to claim 1, characterized in that, Also includes: The quick-connect terminal has one end connected to the plurality of voltage detection circuits and the status display circuit, and the other end connected to the plurality of indicator lights.

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