Relay logic unit, logic control method and logic monitoring method for train

Abstract

The present invention relates to the field of train control technology, and discloses a train relay logic unit, logic control method, and logic monitoring method, comprising: a relay chassis, a logic backplane disposed in the relay chassis, and a relay board fixed to the logic backplane; the relay board is used to receive an operation control signal from a train control console and output a control signal converted from the operation control signal to a corresponding device in the train; the logic backplane is used to divide the operation control signal into different control signals according to a preset operation logic, and transmit the control signal to the corresponding relay board. The present invention can facilitate the unified installation and maintenance of all relays on a train, reduce the failure rate of train operation, reduce maintenance costs, improve maintenance efficiency, and improve the overall reliability of train operation.

Description

Technical Field

[0001] The present invention relates to the technical field of train control, and in particular to a relay logic unit, a logic control method and a logic monitoring method for a train. Background Art

[0002] Relays play a vital role in train control, with each train containing hundreds of them. They play a crucial role in signal transmission and logic control, such as vehicle traction, braking, doors, air conditioning, lighting, and broadcasting and entertainment operations. The status of relays directly impacts train operations. However, statistical analysis of the causes of train control circuit failures indicates that over 60% of train failures are caused by relay malfunctions, which gradually begin to fail after two to three years of operation. Relays age over their normal lifecycle, leading to functional degradation and even failure, posing a serious threat to the safe and stable operation of trains. Currently, train control logic implementations involve hundreds of relays, distributed across various cabinets within the train. This decentralized location of relays makes centralized installation, maintenance, and monitoring inconvenient, hindering timely intervention when faults occur. Summary of the Invention

[0003] In view of this, the present invention provides a relay logic unit, a logic control method and a logic monitoring method for trains to solve the problem that the decentralized arrangement of relays makes it inconvenient to uniformly install, maintain and monitor them.

[0004] In a first aspect, the present invention provides a relay logic unit for a train, comprising: a relay chassis, a logic backplane disposed in the relay chassis, and a first preset number of relay boards fixed to the logic backplane;

[0005] A relay board is used to receive the operation control signal from the train control console and output the control signal converted from the operation control signal to the corresponding device in the train;

[0006] The logic backplane is used to divide the operation control signals into different control signals according to the preset operation logic, and transmit the control signals to the corresponding relay boards.

[0007] The train relay logic unit provided by an embodiment of the present invention is configured by placing a logic backplane, which is fixed with an MCU main control board, a power board, a relay board, and an acquisition board, within a relay chassis. The logic backplane receives the operation control signal from the train control console via the relay board, divides the operation control signal into different control signals according to a preset operation logic, and transmits the control signal to the corresponding relay board. The relay board then outputs the corresponding control signal to the corresponding device within the train. By centralizing all relays on the train, the present invention facilitates unified installation and maintenance of all relays on the train, reduces the train operation failure rate, reduces maintenance costs, improves maintenance efficiency, and thus improves the overall reliability of the train operation.

[0008] In an optional embodiment, it also includes: a second preset number of acquisition boards, an MCU main control board and a power supply board fixed to the logic backplane; the acquisition board is used to acquire the voltage signal and the current signal at the relay board corresponding to the control signal; the MCU main control board is used to receive and store the voltage signal and the current signal, and compare the voltage signal or the current signal with a preset limit threshold, and generate an alarm signal according to the comparison result.

[0009] The present invention monitors the relay board of the logic backplane through the acquisition board exchange and the MCU main control board, which can quickly locate the fault location and improve the maintenance efficiency.

[0010] In an optional embodiment, the logic connection lines inside the logic backplane are planned according to a preset operation logic, which is the control operation steps for different control positions in the train; the relay board is connected to the logic connection lines through a Harding connector deployed on the logic backplane.

[0011] By planning the logical connections within the logic backplane according to the control logic for different control positions within the train, the present invention can implement all control operation steps in the form of line connections, thereby integrating and deploying relays at different control positions together, facilitating the unified installation and maintenance of train relays. Simultaneously, by connecting the relay board to the logic connection lines of the logic backplane, the relays can be deployed to the relay board, and then the connections between different relays can be achieved according to the logic connection lines of the logic backplane, thereby realizing logical operations at different control positions on the train.

[0012] In an optional embodiment, the relay board is divided into three categories, including: a first-category relay board, a second-category relay board, and a third-category relay board; the first-category relay board consists of a 2PCS Harding connector, a 4PCS two-way normally open relay, and a first indicator light; the second-category relay board consists of a 2PCS Harding connector, a 1PCS two-way normally open relay, a 3PC two-way normally closed relay, and a second indicator light; the third-category relay board consists of a 2PCS Harding connector, a 3PC four-way normally open relay, and a third indicator light.

[0013] By providing different types of relay boards, the present invention can meet the deployment requirements of different types of relays on the train, facilitate the integration of all relays on the train into the relay logic unit, and realize the unified installation and maintenance of the relays.

[0014] In an optional embodiment, a preset number of relays are deployed on the same relay board, and the relay board outputs the control signal to the corresponding device in the train through the corresponding relay.

[0015] The present invention outputs control signals to relays deployed thereon through a relay board, and then outputs the signals to corresponding equipment on the train through the relay, thereby enabling control of different equipment based on the integrated deployment of relays.

[0016] In an optional embodiment, it further includes: a power supply board fixed to the logic backplane, and the power supply board is used to supply power to the acquisition board and the MCU main control board.

[0017] By deploying independent power supply boards for the acquisition board and the MCU main control board, the present invention can ensure that the monitoring of the relay board will not fail due to a fault of the relay board, thereby ensuring the normal progress of the monitoring.

[0018] In an optional embodiment, the MCU main control board is also used to monitor the power signal of the power board and generate an alarm signal when the power supply of the power board is abnormal; the MCU main control board is also provided with a communication function for sending the alarm signal to an external device.

[0019] The present invention uses the MCU main control board to achieve real-time monitoring of relays and power supplies, which can monitor the train's operating status, reduce the train's operating failure rate, reduce maintenance costs, and improve maintenance efficiency. At the same time, the MCU main control board sends alarm signals to the outside, making it easier for staff to monitor the train's operating status and conduct timely inspections when alarms occur, thereby reducing the train's operating failure rate, reducing maintenance costs, improving maintenance efficiency, and ensuring safe and stable train operation.

[0020] In a second aspect, the present invention provides a logic control method for a train relay logic unit, comprising:

[0021] The relay board receives the operation control signal from the train control console;

[0022] The logic backplane divides the operation control signal into different control signals and transmits the control signals to the corresponding relay board;

[0023] The relay board outputs the corresponding control signal to the corresponding equipment in the train.

[0024] The logic control method for a train relay logic unit provided by an embodiment of the present invention receives operational control signals from a train control console via a relay board. The logic backplane divides the operational control signals into different control signals and transmits the control signals to the corresponding relay boards. The relay boards then output the corresponding control signals to the corresponding devices within the train. By centralizing all relays on a train, the present invention facilitates the unified installation and maintenance of all relays on the train while achieving control over train operation, thereby improving the overall reliability of train operation.

[0025] In a third aspect, the present invention provides a logic monitoring method for a train relay logic unit, comprising:

[0026] The acquisition board collects the voltage and current signals of the relays deployed on the relay logic unit;

[0027] The MCU main control board receives and stores voltage and current signals, compares the voltage or current signals with preset thresholds, and generates an alarm signal based on the comparison results.

[0028] The logic monitoring method for a train relay logic unit provided by an embodiment of the present invention uses an acquisition board to collect voltage and current signals from relays deployed on the relay logic unit. The MCU main control board receives and stores the voltage and current signals, compares the voltage or current signals with a preset threshold, and generates an alarm signal based on the comparison result. By centralizing the monitoring of all relays on a train, the present invention can monitor the train's operating status in real time, reduce the train's operating failure rate, lower maintenance costs, improve maintenance efficiency, and ensure safe and stable train operation.

[0029] In an optional embodiment, the method further includes: the MCU main control board monitors the power signal of the power board and generates an alarm signal when the power supply of the power board is abnormal.

[0030] The present invention sends alarm signals to the outside through the MCU main control board, which can facilitate staff to understand the train operation status and check in time when an alarm occurs, thereby reducing the train operation failure rate, reducing maintenance costs, improving maintenance efficiency, and ensuring safe and stable operation of the train. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 is a structural block diagram of a train relay logic unit according to an embodiment of the present invention;

[0033] Figure 2 2. It is a schematic diagram of the board card deployment structure on the logic backplane of the train relay logic unit according to an embodiment of the present invention;

[0034] Figure 3 1 is a circuit diagram of a brake command of a train relay logic unit according to an embodiment of the present invention;

[0035] Figure 4 1 is a circuit diagram of logic instructions of a gate control system of a train relay logic unit according to an embodiment of the present invention;

[0036] Figure 5 2 is a schematic diagram of a door safety loop relay monitoring circuit of a train relay logic unit according to an embodiment of the present invention;

[0037] Figure 6 1. A schematic diagram showing the specifications and characteristics of relay board contacts of a train relay logic unit according to an embodiment of the present invention;

[0038] Figure 7 is a data analysis diagram of a train relay logic unit according to an embodiment of the present invention;

[0039] Figure 8 2 is a waveform diagram of a data analysis result of a train relay logic unit according to an embodiment of the present invention;

[0040] Figure 9 1 is a flow chart of a logic control method of a train relay logic unit according to an embodiment of the present invention;

[0041] Figure 10 4 is a flow chart of a logic monitoring method for a train relay logic unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0043] The embodiment of the present invention is applicable to scenarios where different devices in a train are controlled. The embodiment of the present invention provides a train relay logic unit that integrates the relays in the train to achieve the effect of unified installation, maintenance and monitoring of the relays.

[0044] The present invention provides a relay logic unit for trains, such as Figure 1 As shown, it includes: a relay chassis 10, a logic backplane 20 arranged in the relay chassis, and a first preset number of relay boards 30 fixed to the logic backplane;

[0045] The relay board 30 is used to receive the operation control signal from the train control console and output the control signal converted from the operation control signal to the corresponding equipment in the train; the logic backplane 20 is used to divide the operation control signal into different control signals according to the preset operation logic, and transmit the control signal to the corresponding relay board 30.

[0046] Specifically, in this embodiment of the present invention, the logic backplane 20 is a PCB substrate, and its internal logic lines are arranged according to a preset operational logic, wherein the preset operational logic represents the control operation steps for different control locations within the train. The relay boards 30 are connected to the logic lines via Harding connectors deployed on the logic backplane 20, thereby connecting the different relay boards. When signals are transmitted between the different relays along the logic lines, control operations are performed on the corresponding control locations.

[0047] In some optional embodiments, such as Figure 1 As shown, the relay logic unit of the embodiment of the present invention also includes a second preset number of acquisition boards 40, an MCU main control board 50 and a power supply board 60 fixed to the logic backplane, wherein the acquisition board 40 is used to collect the voltage signal and the current signal at the relay board 30 corresponding to the control signal; the MCU main control board 50 is used to receive and store the voltage signal and the current signal, and compare the voltage signal or the current signal with a preset limit threshold, and generate an alarm signal according to the comparison result; the power supply board 60 is used to supply power to the acquisition board 40 and the MCU main control board 50.

[0048] In some optional embodiments, such as Figure 2In the illustrated logic backplane 20, XCN1-XCN19 represent 19 relay boards 30. This embodiment of the present invention divides the 17 relay boards 30 into three categories: first-category relay boards, second-category relay boards, and third-category relay boards, with two designated as standby relay boards. The first-category relay boards consist of two Harding connectors, four two-way normally open relays, and a first indicator light. When a logic high level is input to this relay board from the logic backplane 20 (or when the backplane logic relays are engaged and outputting a high level), the corresponding indicator light illuminates. The second-category relay boards consist of two Harding connectors, one two-way normally open relay, three two-way normally closed relays, and a second indicator light. When a logic high level is input to this relay board from the logic backplane 20 (or when the backplane logic relays are engaged and outputting a high level), the corresponding indicator light illuminates. The third type of relay board consists of 2PCS Harding connectors, 3PC four-way normally open relays and a third indicator light. When a logic high level is input to this type of relay board from the logic backplane 20 (or the backplane logic relay is energized and outputs a high level), the corresponding indicator light turns on.

[0049] In some optional embodiments, each relay board 30 on the logic backplane 20 of the embodiment of the present invention can be deployed with multiple relays, and the deployment method is carried out according to the pre-set operating logic. After the relay board 30 receives the control signal divided by the logic backplane 20, it outputs it to the corresponding equipment in the train through the corresponding relay to realize the logical control of the train, such as the control of the train's traction, braking, doors, air conditioning, fire alarm or lifting pantograph, etc.

[0050] In some optional embodiments, such as Figure 2 In the illustrated logic backplane 20, X30 and X40 represent two acquisition boards 40. In this embodiment of the present invention, an isolated transmission module is used to collect voltage or current parameters on the signal lines of the control relay board 30. One acquisition board 40 is used to collect voltage signals, and one acquisition board 40 is used to collect current signals. The voltage acquisition board has 16 acquisition channels, capable of collecting 0-160V DC voltage. The current acquisition board has 12 acquisition channels, capable of collecting 8 channels of 0-5A current internally, and 4 channels for collecting 0-5V current signals input by external current transformers. The acquisition board 40 converts the collected voltage and current signals into 12-bit digital signals via a high-speed sampling chip. All digital signals are transmitted to the MCU main control board 50 via the FPGA.

[0051] In some optional embodiments, the MCU main control board 50 of the embodiment of the present invention receives voltage signals and current signals, stores the collected data locally, compares the voltage signal or current signal with a preset limit threshold, and generates an alarm signal based on the comparison result.

[0052] In some optional embodiments, the MCU main control board 50 of the embodiment of the present invention is also used to monitor the power supply signal of the power supply board 60 and generate an alarm signal when the power supply of the power supply board 60 is abnormal. In the embodiment of the present invention, the logic backplane 20 and the relay board 30 are powered by the operation control signal of the train control console, so the power supply board 60 only needs to power the acquisition board 40 and the MCU main control board 50, realizing the power supply independence of the relay monitoring. The power supply board 60 of the embodiment of the present invention obtains a DC110V power supply from the train, which is converted into a DC5V power supply by the power supply to power the acquisition board 40 and the MCU main control board 50. It can also provide another power supply to provide DC24V power to the outside for powering the external current transformer. The power supply board 60 is provided with a chassis ID, over-voltage and under-voltage monitoring and CAN communication. When the MCU main control board detects a power supply abnormality, an alarm is issued.

[0053] In some optional embodiments, the MCU main control board 50 of the embodiment of the present invention is provided with a communication function for sending alarm signals to external devices, such as communicating with a train or an external computer via Ethernet. PTU software can be used to maintain, view, and analyze data. As the data accumulates, the data change trend can be judged through big data analysis to predict the life cycle of the relay.

[0054] In some optional embodiments, the embodiment of the present invention takes the braking instruction of the train control console as an example, and the ATP 7-level braking instruction uses a two-way normally open relay and a two-way normally closed relay in the second type of relay board. When the train control console does not output the ATP 7-level braking instruction, the normally open relay has no output, and the signal is input from D32 of the Harding connector on the XCN12 slot. Since the relay is normally open, this signal is output from Z14 of the Harding connector on the XCN12 slot as a low level, and the second indicator light is off. The normally closed relay channel inputs a signal from D30 and outputs it from Z10, at which point the second indicator light is on. When the train control console outputs the ATP 7-level braking instruction, the braking instruction is output from Figure 2 The D12 input of the Harding connector on the XCN12 slot shown is high level, and D16 is connected to negative. At this time, the normally open relay is closed, Z14 outputs high level, and the second indicator light is lit. The Z10 of the normally closed relay outputs low level, and the second indicator light is off. At the same time, the logic backplane 20 inputs this braking command to the handle traction status relay, handle brake status relay, handle brake command relay 1, handle brake command relay 2 and handle brake command relay 3 deployed on other relay boards in sequence to achieve braking. The corresponding logic circuit inside the logic backplane is as follows Figure 3 shown.

[0055] In some optional implementations, the embodiment of the present invention takes the door control system logic instructions of the train control console as an example. The door control system logic instructions include six instructions: local right door enable, local left door enable, local right door open, local left door open, local left door close, and local right door close. Relays with speeds less than 5KM and relays with speeds greater than 10KM will be used. Among them, the six instructions of local right door enable, local left door enable, local right door open, local left door open, local left door close, and local right door close are generated by Figure 2 The two normally open relays on the first type relay board on the XCN7 and XCN8 slots shown in the figure are executed. The two signal logics of the relay for speed less than 5KM and the relay for speed greater than 10KM are executed by the four normally open relays on the third type relay board on the XCN13 slot. The implementation process of each door control system logic instruction is as follows: (1) Power Z30 of the first type relay board on the XCN8 slot and negative power D20. At this time, the relay indicator on XCN8 lights up. (2) Input a high level from D16 on XCN7, Z22 on XCN7 outputs a high level, the relay indicator on XCN7 lights up, and the local right door is enabled. (3) Input a high level from D24 on XCN7, Z26 on XCN7 outputs a high level, and the relay indicator lights up at the same time, and the local right door is opened. (4) Input a high level from D20 on XCN8, Z22 on XCN8 outputs a high level, and the relay indicator lights up at the same time, and the local right door is closed. (5) Input a high level from D8 on XCN7, Z14 on XCN7 outputs a high level, the relay indicator lights up, and the local left door is enabled. (6) Input a high level from D12 on XCN7, Z18 on XCN7 outputs a high level, and the relay indicator lights up, and the local left door is opened. (7) Input a high level from D24 on XCN8, Z26 on XCN8 outputs a high level, and the relay indicator lights up, and the local left door is closed. The corresponding logic circuit inside the logic backplane is as follows Figure 4 shown.

[0056] In some optional implementations, the embodiment of the present invention takes the door safety loop relay monitoring as an example, and the door safety loop signal is input at a high level by D32 on XCN8, and the signal is output from D12 on XCN8. The voltage acquisition channel V14 acquires a high level. The control signal is added from D16 of XCN1 and D12 is grounded to start the door safety loop relay. The voltage acquisition channel V16 acquires a high level, and the current acquisition channel A6 acquires the current at the same time. The MCU main control board 50 monitors the data during the operation of the train, marks the signal that exceeds the limit, and issues an alarm, corresponding to the logic circuit inside the logic backplane such as Figure 5 shown.

[0057] In some optional implementations, the contacts of different relay boards in the relay logic unit have different specifications and characteristics, such as Figure 6 As shown. The embodiment of the present invention takes the prediction of relay life as an example, and takes a commonly used vehicle relay as an example, whose electrical life is about 1 million times, the rated operating current is 0.3A at DC110V, the action time and reset time are less than 20ms, and the bounce time is less than 3ms. According to the above information, the upper limit of the number of relay actions is pre-set to 1 million times of life through the PTU software supporting the relay logic unit, and the maximum current is set to 1A. The life value will be reduced if the current exceeds the limit. When the relay in the vehicle is running, due to aging of the contacts, degradation of the performance of the springs, and functional attenuation, which lead to abnormal conditions such as increased relay action time, severe contact arcing, difficulty in closing, and weak bounce, the MCU main control board 50 detects that the data signal collected by the acquisition board 40 is abnormal and issues an alarm. At this time, the PTU software supporting the relay logic unit is used to perform data analysis on the event, such as Figure 7 and Figure 8 As shown, you can view the signal level conversion duration and current change trends to quickly identify the fault problem and find the cause. When the train reaches a certain mileage and the relay life value has reached the limit, the relay in the relevant circuit can be replaced to improve the overall reliability of the train operation.

[0058] In some optional implementations, the present invention integrates all train relays within a relay logic unit. This reduces extensive vehicle wiring, centralizes relays in a single location, and facilitates installation and maintenance, shortening repair time. This also eliminates errors caused by vehicle wiring, reduces train weight, and increases available space. Furthermore, relay lifespan prediction is possible, allowing relays that are aging, experiencing functional degradation, or at risk of failure to be replaced in advance, ensuring safe and stable train operation.

[0059] The train relay logic unit provided by the embodiment of the present invention is provided by setting a logic backplane fixed with an MCU main control board, a power board, a relay board and an acquisition board in a relay chassis, receiving the operation control signal of the train control console through the relay board, dividing the operation control signal into different control signals according to the preset operation logic by the logic backplane, and transmitting the control signal to the corresponding relay board, which outputs the corresponding control signal to the corresponding device in the train, and at the same time, after the power board supplies power to the acquisition board and the MCU main control board, the acquisition board collects the voltage signal and current signal at the relay board corresponding to the control signal, the MCU main control board receives and stores the voltage signal and current signal, and compares the voltage signal or current signal with a preset limit threshold, and generates an alarm signal according to the comparison result. The present invention can facilitate the unified installation and maintenance of all relays on the train by centralizing all relays on the train and deploying monitoring and alarm equipment, so as to monitor the train operation status in real time, reduce the train operation failure rate, reduce maintenance costs, improve maintenance efficiency, and thus improve the overall reliability of the train operation.

[0060] In this embodiment, a logic control method of a train relay logic unit is provided. Figure 9 1 is a flow chart of a logic control method for a train relay logic unit according to an embodiment of the present invention. Although the logic sequence is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than here. Figure 9 As shown, the process includes the following steps:

[0061] Step S901: The relay board receives an operation control signal from the train control console.

[0062] Specifically, in this embodiment of the present invention, the relay logic unit can be divided into two independently operating systems. One is a logic control system consisting of a logic backplane and relay boards, which is used to implement logical control functions for the train, ensuring normal train operation. When train personnel generate operational control signals by operating the train control console according to train operation requirements, the operational control signals are transmitted via lines to the relay boards of the relay logic unit. These operational control signals implement control of the train's traction, braking, doors, air conditioning, fire alarms, pantographs, and other functions, for example only and not by way of limitation.

[0063] In step S902 , the logic backplane divides the operation control signal into different control signals and transmits the control signals to corresponding relay boards.

[0064] Specifically, in this embodiment of the present invention, logic cables are installed within the logic backplane, which can separate operational control signals into different control signals according to preset operational logic and transmit these control signals to the corresponding relay boards. During the actual control process, the control signals are also transmitted between the different relay boards via the logic cables of the logic backplane, and the specific transmission process is based on the operational logic corresponding to the logical control function to be implemented.

[0065] In step S903, the relay board outputs the corresponding control signal to the corresponding device in the train.

[0066] Specifically, in an embodiment of the present invention, the relay board controls the device corresponding to the control signal output value through the relay deployed thereon, thereby realizing control of the device, such as door switching, raising and lowering the bow, traction braking, air conditioning control, etc., but is not limited to this.

[0067] The logic control method for a train relay logic unit provided by an embodiment of the present invention receives operational control signals from a train control console via a relay board. The logic backplane divides the operational control signals into different control signals and transmits the control signals to the corresponding relay boards. The relay boards then output the corresponding control signals to the corresponding devices within the train. By centralizing all relays on a train, the present invention facilitates the unified installation and maintenance of all relays on the train while achieving control over train operation, thereby improving the overall reliability of train operation.

[0068] In this embodiment, a logic monitoring method for a train relay logic unit is provided. Figure 8 1 is a flow chart of a logic monitoring method for a train relay logic unit according to an embodiment of the present invention. Although the logic sequence is shown in the flow chart, in some cases, the steps shown or described may be performed in a different order than here. Figure 10 As shown, the process includes the following steps:

[0069] Step S1001: The acquisition board collects voltage signals and current signals of the relays deployed on the relay logic unit.

[0070] Specifically, in an embodiment of the present invention, the second independently working system of the relay logic unit is a logic monitoring system composed of an acquisition board, an MCU main control board and a power supply board, which is used to realize logic monitoring of the train through data acquisition to prevent serious faults.

[0071] In some optional embodiments, the acquisition boards of the present invention include voltage acquisition boards and current acquisition boards. During column operation, control signals are transmitted between the logic backplane and the relay boards, corresponding to either high-level or low-level signals at the relay board points. During the process of control signal input and output, the acquisition boards collect the current or voltage at the relevant points.

[0072] In step S1002 , the MCU main control board receives and stores the voltage signal and the current signal, compares the voltage signal or the current signal with a preset threshold value, and generates an alarm signal according to the comparison result.

[0073] Specifically, in this embodiment of the present invention, the acquisition board converts the collected voltage or current signals into 12-bit digital signals via a high-speed sampling chip. The digital signals are then transmitted to the MCU main control board via an FPGA. The MCU main control board then evaluates the digital signals based on pre-stored thresholds and generates and issues an alarm signal if the thresholds are exceeded.

[0074] In some optional implementations, the MCU main control board of the embodiment of the present invention further monitors the power signal of the power board and generates an alarm signal when the power supply of the power board is abnormal.

[0075] In some optional embodiments, the MCU main control board of the embodiment of the present invention has a communication function, which can send digital signals and alarm data to an external device, such as an external computer, and then use PTU software to perform big data analysis to determine the changing trend of the data and predict the life cycle of related components.

[0076] The logic monitoring method for a train relay logic unit provided by an embodiment of the present invention uses an acquisition board to collect voltage and current signals from relays deployed on the relay logic unit. The MCU main control board receives and stores the voltage and current signals, compares the voltage or current signals with a preset threshold, and generates an alarm signal based on the comparison result. By centralizing the monitoring of all relays on a train, the present invention can monitor the train's operating status in real time, reduce the train's operating failure rate, lower maintenance costs, improve maintenance efficiency, and ensure safe and stable train operation.

[0077] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A relay logic unit for trains, characterized in that: include: A relay chassis, a logic backplane arranged in the relay chassis, a first preset number of relay boards fixed to the logic backplane, a second preset number of acquisition boards fixed to the logic backplane, an MCU main control board, and a power supply board; The relay board is used to receive the operation control signal of the train control console and output the control signal converted from the operation control signal to the corresponding device in the train; The logic backplane is used to divide the operation control signal into different control signals according to a preset operation logic and transmit the control signal to the corresponding relay board. The logic connection lines within the logic backplane are arranged according to the preset operation logic, and the preset operation logic is the control operation steps for different control positions in the train. The relay board is connected to the logic connection lines via a Harding connector deployed on the logic backplane; The acquisition board is used to acquire the voltage signal and the current signal at the relay board corresponding to the control signal; The MCU main control board is used to receive and store the voltage signal and the current signal, compare the voltage signal or the current signal with a preset threshold value, and generate an alarm signal according to the comparison result.

2. The relay logic unit according to claim 1, characterized in that: The relay boards are divided into three categories, including: first-category relay boards, second-category relay boards, and third-category relay boards; The first type of relay board consists of 2PCS Harding connectors, 4PCS two-way normally open relays and the first indicator light; The second type of relay board consists of 2PCS Harding connectors, 1PCS two-way normally open relay, 3PC two-way normally closed relay and a second indicator light; The third type relay board consists of 2PCS Harding connectors, 3PC four-way normally open relays and a third indicator light.

3. The relay logic unit according to claim 1, characterized in that: A preset number of relays are deployed on the same relay board, and the relay board outputs the control signal to the corresponding device in the train through the corresponding relay.

4. The relay logic unit according to claim 1, characterized in that: Also includes: A power supply board fixed to the logic backplane, the power supply board is used to supply power to the acquisition board and the MCU main control board.

5. The relay logic unit according to claim 4, characterized in that: The MCU main control board is also used to monitor the power signal of the power board and generate an alarm signal when the power supply of the power board is abnormal; The MCU main control board is also provided with a communication function for sending the alarm signal to an external device.

6. A logic control method for a train relay logic unit, characterized in that: The method for controlling different devices in a train based on the relay logic unit according to any one of claims 1 to 5 comprises: The relay board receives the operation control signal from the train control console; The logic backplane divides the operation control signal into different control signals and transmits the control signals to the corresponding relay boards; The relay board outputs the corresponding control signal to the corresponding device in the train.

7. A logic monitoring method for a train relay logic unit, characterized in that: The method for monitoring the logic control process of a train based on the relay logic unit according to any one of claims 1 to 5 comprises: The acquisition board collects the voltage and current signals of the relays deployed on the relay logic unit; The MCU main control board receives and stores the voltage signal and the current signal, compares the voltage signal or the current signal with a preset threshold value, and generates an alarm signal according to the comparison result.

8. The method according to claim 7, characterized in that Also includes: The MCU main control board monitors the power signal of the power board and generates an alarm signal when the power supply of the power board is abnormal.

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