An emergency bypass device for subway trains based on PLC control technology

Abstract

This utility model discloses an emergency bypass device for subway trains based on PLC control technology, including a control module, a data acquisition module, and a monitoring module. The control module is connected to the data acquisition module, which receives train status signals in real time and transmits them to the control module, which then performs corresponding actions. The monitoring module is connected to the control module and is used for manual operation in emergency situations, sending trigger signals to the control module. This utility model, through the cooperation of the control module, data acquisition module, and monitoring module, enables the train to operate when it is unable to move due to abnormal relay contacts. The operator issues a command via a one-button trigger, bypassing the circuit containing the faulty relay. The automatic matching mode bypasses all relevant critical relay contacts, and the manual forced bypass releases the locked state of the faulty track vehicle, allowing the train to operate and effectively ensuring the safe operation of subway equipment.

Description

Technical Field

[0001] This utility model relates to the field of subway train control system technology, and in particular to an emergency bypass device for subway trains based on PLC control technology. Background Technology

[0002] With the rapid development of urban rail transit, subway trains have become the core carrier of urban public transportation. Their operational safety and reliability are directly related to the safety of life and property of passengers and the smooth operation of the urban transportation system. In the actual operation of subway trains, sudden situations such as vehicle control system failures, sensor false alarms, and line abnormalities often cause trains to be unable to start or run normally, resulting in an emergency situation of "unable to move the train".

[0003] In response to such emergencies, traditional methods often rely on manual troubleshooting and bypass operations. However, this approach has several limitations: firstly, manual troubleshooting is time-consuming and can easily cause line congestion, affecting subway operation efficiency; secondly, manual bypass operations require highly skilled operators, and human error can easily lead to secondary malfunctions, seriously threatening train operation safety; furthermore, traditional bypass devices often use fixed logic circuit designs, have limited functionality and poor flexibility, making them difficult to adapt to the control systems of different subway train models, resulting in low versatility.

[0004] Therefore, an emergency bypass device for subway trains based on PLC control technology is proposed. This device can realize one-button emergency bypass operation, has a rapid response, high reliability, and strong versatility. It is of great significance for quickly handling emergency situations where subway trains cannot move and ensuring the safety of subway operations. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems by providing a subway train emergency bypass device based on PLC control technology. This utility model utilizes a control module, a data acquisition module, and a monitoring module working together. When a train is unable to move due to abnormal relay contacts, the system enters an emergency response state. The operator issues a command via a one-button trigger to bypass the circuit containing the faulty relay. The automatic matching mode bypasses all relevant critical relay contacts, and the manual forced bypass releases the locked state of the faulty track vehicle, enabling the train to move. This device has advantages such as simple structure, ease of implementation, high real-time performance, and strong compatibility, effectively ensuring the safe operation of subway equipment. To achieve the above-mentioned utility model objectives, the technical solution adopted is as follows: According to one aspect of this utility model, a subway train emergency bypass device based on PLC control technology is provided, including a control module, a data acquisition module, and a monitoring module. The control module is connected to the data acquisition module, which receives train status signals in real time and transmits them to the control module, which then performs corresponding actions. The monitoring module is connected to the control module and is used for manual operation in emergency situations, triggering a signal to the control module.

[0006] Preferably, the control module includes multiple relays, which are controlled by a PLC to sequentially determine the normally open and normally closed contact signals of the received key train relays, and issue a large bypass control signal according to the line.

[0007] Preferably, the acquisition module includes a PLC control module and an input / output (I / O) module, and the output I / O module is electrically connected to the train's key relays via wires.

[0008] Preferably, the monitoring module includes a touch screen and buttons. Data interaction is achieved between the touch screen and the PLC control module. The touch screen is used to display the operating status of the device and abnormal information of key train relays in real time.

[0009] Preferably, the PLC control module and the touch screen establish communication via a 9-pin serial port.

[0010] Preferably, the input / output I / O module has a dual-channel detection function. The detection status of the input / output I / O module is processed by the PLC control module and then displayed on the touch screen in real time in the form of dynamic icons and digital values.

[0011] Preferably, the touchscreen integrates a one-touch bypass button to prevent accidental touches.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: This utility model describes a subway train emergency bypass device based on PLC control technology. Through the cooperation of a control module, a data acquisition module, and a monitoring module, when the train cannot move due to abnormal relay contacts, the system enters an emergency response state. The operator issues a command through a one-button trigger to bypass the circuit where the faulty relay is located. The automatic matching mode bypasses all relevant key relay contacts, and the manual forced bypass releases the locked state of the faulty track vehicle, enabling the train to move. It has the advantages of simple structure, easy implementation, high real-time performance, and strong compatibility, and can effectively ensure the safe operation of subway equipment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the system structure of this utility model; In the attached diagram: 1. Key; 2. Button; 3. Relay. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of the utility model, and these aspects can be achieved even without these specific details.

[0015] Please see Figure 1 This utility model provides an emergency bypass device for subway trains based on PLC control technology. The technical solution is as follows: It includes a control module, a data acquisition module, and a monitoring module. The control module is connected to the data acquisition module, which receives train status signals in real time and transmits them to the control module. The control module then takes corresponding actions. The monitoring module is connected to the control module and is used for manual operation in emergency situations, triggering a signal to the control module.

[0016] The control module includes multiple relays 3. The PLC controls the sequential judgment of the normally open and normally closed contact signals of the received train key relays 3, and issues a large bypass control signal according to the line.

[0017] The acquisition module includes a PLC control module and an input / output (I / O) module. The output I / O module is electrically connected to the train key relay 3 via wires.

[0018] The monitoring module includes a touch screen and buttons 2. Data interaction is achieved between the touch screen and the PLC control module. The touch screen is used to display the operating status of the device and abnormal information of the train's key relays 3 in real time.

[0019] The PLC control module communicates with the touch screen via a 9-pin serial port to acquire real-time information on the train's traction and braking status, as well as any abnormalities in the critical relay 3, and to bypass the critical relay 3 of the rail vehicle.

[0020] The input / output (I / O) module has a dual-channel detection function, which can monitor the on / off status of the three key train relays in real time. The collected data is transmitted to the PLC control module after photoelectric isolation. The detection status of the I / O module is processed by the PLC control module and displayed on the touch screen in real time in the form of dynamic icons and digital values. The normally open contact is represented by a solid green icon, the open contact by a hollow red icon, and the normally closed contact uses the opposite color coding rule. The operator can intuitively judge the working status of each key relay contact through the touch screen.

[0021] The touch screen integrates a one-button bypass button 2 to prevent accidental touches. The touch screen sends a bypass command to the PLC control module, and the PLC control module immediately drives the execution module to perform actions. According to the interface definition of different subway lines, the automatic matching mode bypasses all relevant key relay 3 contacts. The lock status of the faulty track vehicle is released by manual forced bypass, so that the train can be ready to move.

[0022] Control Module: The core control unit of the device is a PLC control module (model: Siemens S7-1200), which has a pre-written emergency bypass control logic program. This program can automatically determine whether the emergency bypass function needs to be activated based on the train status signal input from the signal acquisition module and according to preset logic rules, and output corresponding control commands to the execution module. The control loop consists of a relay 3 drive circuit; after the control command output by the PLC control module, the relay 3 is activated to achieve bypass control of various fault circuits of the train. It can meet the bypass control requirements of train emergency braking, traction blocking, and other circuits.

[0023] The monitoring terminal consists of a touchscreen (model: TPC1061ti) and button 2, connected to the control terminal via a 9-pin serial cable. It includes a one-button trigger (2), a display screen, and operation buttons. The one-button trigger (2) is used by the operator to manually activate the emergency bypass function in emergencies, controlled by key 1 and button 2, with the trigger signal directly transmitted to the PLC control module. The touchscreen displays the real-time operating status of the device and abnormal information from the train's critical relays (3).

[0024] Data Acquisition Module: This module enables the PLC control module to acquire operational information from the train control system via input I / O modules. The device can receive control commands from the train control system in real time and provide feedback on its operational status and emergency response information.

[0025] When the train is unable to move due to an abnormality in the contact of relay 3, the system enters emergency response mode. The operator issues a command through the anti-misoperation one-button trigger 2 of the human-machine interaction module, which executes the relay 3 array in the module according to the sequence of "fault isolation and bypass conduction". By bypassing the circuit where the faulty relay 3 is located, the automatic matching mode bypasses all relevant key relay 3 contacts. The lock status of the faulty track vehicle is released by manual forced bypass, so that the train can be moved.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A subway train emergency bypass device based on PLC control technology, characterized in that, include: The system includes a control module, a data acquisition module, and a monitoring module. The control module is connected to the data acquisition module, which receives train status signals in real time and transmits them to the control module. The control module then takes corresponding actions. The monitoring module is connected to the control module and is used for manual operation in emergency situations, triggering a signal to the control module.

2. The emergency bypass device for subway trains based on PLC control technology according to claim 1, characterized in that: The control module includes multiple relays. It uses a PLC to sequentially determine the normally open and normally closed contact signals of the received key train relays and issues a large bypass control signal according to the line.

3. The emergency bypass device for subway trains based on PLC control technology according to claim 1, characterized in that: The acquisition module includes a PLC control module and an input / output (I / O) module. The output I / O module is electrically connected to the train's key relays via wires.

4. The emergency bypass device for subway trains based on PLC control technology according to claim 3, characterized in that: The monitoring module includes a touch screen and buttons. Data interaction is achieved between the touch screen and the PLC control module. The touch screen is used to display the operating status of the device and abnormal information of key train relays in real time.

5. The emergency bypass device for subway trains based on PLC control technology according to claim 4, characterized in that: The PLC control module and the touch screen establish communication via a 9-pin serial port.

6. The emergency bypass device for subway trains based on PLC control technology according to claim 3, characterized in that: The input / output (I / O) module has a dual-channel detection function. The detection status of the input / output (I / O) module is processed by the PLC control module and then displayed on the touch screen in real time as dynamic icons and digital values.

7. The emergency bypass device for subway trains based on PLC control technology according to claim 4, characterized in that: The touchscreen integrates a one-touch bypass button to prevent accidental touches.

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