A subway signal operation and maintenance monitoring and collecting device

Abstract

The utility model provides a subway signal operation and maintenance monitoring collection device, include: the isolated collection circuit, first RJ45 interface, second RJ45 interface, controller, resistance voltage dividing circuit, network transformer, POE power module and jumper module, the controller is connected with the isolated collection circuit, first RJ45 interface is connected second RJ45 interface or network transformer through jumper module, the controller is connected with network transformer, second RJ45 interface, resistance voltage dividing circuit is connected with first RJ45 interface, jumper module, first RJ45 interface connects the upper layer network equipment, and second RJ45 interface connects serial equipment, POE power module is connected first RJ45 interface through jumper module, POE power module connects second RJ45 interface. The utility model uses POE power module power supply, realizes power supply and communication integration, and communication line and power line are combined and set up, and the convenient laying construction reduces the wiring amount of work.

Description

Technical Field

[0001] This utility model belongs to the field of subway signal operation and maintenance technology, and specifically relates to a subway signal operation and maintenance monitoring and acquisition device. Background Technology

[0002] The centralized signal monitoring system is a data acquisition and equipment maintenance platform in the railway signaling field, covering the operational monitoring of key equipment such as station interlocking, cable insulation, interface voltage, external power grid quality, and power supply panels. Its station-level system consists of front-end acquisition modules, communication sub-units, monitoring station units, power supply equipment, and network equipment. Through distributed acquisition, it achieves real-time monitoring of the signaling equipment status, forming a system such as… Figure 1 As shown.

[0003] Monitoring station unit: mainly responsible for data collection, processing, storage, playback, interface display and communication, and is installed in the monitoring cabinet.

[0004] Communication extension unit: mainly responsible for summarizing the measurement data of each acquisition module, converting it into network communication and transmitting it to the monitoring station. It is generally a multi-channel CAN or 485 converted to network port and installed in the monitoring cabinet.

[0005] Data acquisition modules: These are categorized by function into various types, such as turnout voltage acquisition, interface voltage acquisition, switch quantity acquisition, and insulation leakage current acquisition, to collect the status and information of station signaling equipment. They are typically installed near the acquisition point, within the monitoring interface cabinet.

[0006] Power supply equipment: Provides power to the data acquisition module and is installed inside the monitoring cabinet.

[0007] Due to considerations of signal attenuation and interference, the acquisition modules are installed near the acquisition points. The number of modules configured depends on the number of points to be acquired. Since it's necessary to monitor all indicator voltages, interface voltages, key relay statuses, fuse statuses, etc., acquisition modules are generally configured in large numbers. To facilitate installation within the cabinet, acquisition modules often adopt the shape of an AX signal relay, with wiring done via soldering. Acquisition modules typically use 485 or CAN bus communication, and the networking method is daisy-chaining. Daisy-chaining means that the module acting as the intermediate node has multiple communication pins (…). Figure 3 Pins 3 and 4 in the circuit need to be soldered with two wires, one for incoming and one for going to the next node; the power line is the same. Finally, the communication bus and the power bus are returned to the communication sub-unit of the monitoring cabinet, and the communication sub-unit is converted to a network port to connect to the network and communicate with the station.

[0008] Recently, some data acquisition modules have adopted Ethernet communication, but they generally only provide one network port. In order to reduce the number of wires from the monitoring interface cabinet to the monitoring cabinet, a switch needs to be placed in the combination cabinet. After local star networking, the communication lines and power bus are uniformly run to the monitoring cabinet.

[0009] Therefore, the existing technology has the following drawbacks: 1. The power and communication cables between the acquisition module and the monitoring cabinet need to be run separately. 2. If the acquisition module uses RS485 or CAN communication, it requires manual wiring and soldering for connection, resulting in a large amount of wiring work. Utility Model Content

[0010] To overcome the above-mentioned technical defects, this utility model provides a subway signal operation and maintenance monitoring and acquisition device, which can reduce the amount of wiring work.

[0011] This utility model is implemented according to the following technical solution: A subway signal operation and maintenance monitoring and acquisition device includes: an isolation acquisition circuit, a first RJ45 interface, a second RJ45 interface, a controller, a resistor voltage divider circuit, a network transformer, a PoE power supply module, and a jumper module; The controller is connected to the isolated acquisition circuit; The first RJ45 interface is connected to the second RJ45 interface or the network transformer via the patch cord module; The controller is connected to the network transformer and the second RJ45 interface; The resistor voltage divider circuit is connected to the first RJ45 interface and the jumper module; The first RJ45 interface is connected to an upper-layer network device or a serial device, and the second RJ45 interface is connected to a serial device.

[0012] As a further improvement of this utility model, this utility model also includes: a POE power supply module; The PoE power supply module is connected to the first RJ45 interface via the jumper module; The POE power supply module is connected to the second RJ45 interface.

[0013] As a further improvement of this utility model, the jumper module includes: eight switches; The second pin of each of the eight switches is connected to the first RJ45 interface; The first pin of each of the eight switches is connected to the second RJ45 interface; The third pins of the first switch, the second switch, the third switch, and the sixth switch are connected to the network transformer; The third pins of the fourth, fifth, seventh, and eighth switches are connected to the PoE power supply module.

[0014] As a further improvement of this utility model, this utility model also includes: a voltage conversion circuit; The input terminal of the voltage conversion circuit is connected to the POE power supply module, and the output terminal is connected to the controller, the resistor divider circuit, and the network transformer.

[0015] As a further improvement of this utility model, the voltage conversion circuit includes: a first step-down chip, a second step-down chip, and a first resistor; The PoE power supply module is connected to the first step-down chip through the first resistor, and the first step-down chip is connected to the controller, the resistor divider circuit, and the network transformer through the second step-down chip.

[0016] As a further improvement of this utility model, the resistor voltage divider circuit includes: a second resistor, a third resistor, a capacitor, and a second diode; The controller is connected to the second pin of the eighth switch via the second resistor; The controller is grounded through the third resistor, and the capacitor is connected in parallel with the third resistor; The controller is connected to the voltage conversion circuit via the second diode.

[0017] As a further improvement of this utility model, this utility model also includes: an RS485 circuit; The second RJ45 interface is connected to the controller via the RS485 circuit.

[0018] Compared with the prior art, this utility model has the following advantages: it adopts a POE power supply module to achieve integrated power supply and communication, and the communication line and power line are laid together, which facilitates the laying and construction and reduces the amount of wiring work. The first RJ45 interface and the second RJ45 interface are connected through a patch cord module to realize hand-pulled network, which is a data acquisition mode. When the first RJ45 interface and the second RJ45 interface are not connected, it is a protocol conversion mode, which is convenient for maintenance and replacement. Attached Figure Description

[0019] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the centralized monitoring system for stations in the existing technology. Figure 2 This is a schematic diagram of the overall structure of the subway signal operation and maintenance monitoring and acquisition device described in this utility model; Figure 3 This is a connection diagram of the first RJ45 interface, the second RJ45 interface, the resistor voltage divider circuit, the network transformer, the POE power supply module, and the jumper module of this utility model. Figure 4 This is a schematic diagram of the controller described in this utility model; Figure 5This is a schematic diagram of the voltage conversion circuit described in this utility model; Figure 6 This is a schematic diagram of the RS485 circuit described in this utility model; Figure 7 This is a schematic diagram of a practical application scenario of this utility model.

[0020] Explanation of reference numerals in the attached diagram: 1. First RJ45 interface; 2. Second RJ45 interface; 3. Voltage conversion circuit; 4. Isolation acquisition circuit; 5. Controller; 6. Resistor voltage divider circuit; 7. Network transformer; 8. PoE power supply module; 9. Jumper module; 10. RS485 circuit. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] This utility model provides a subway signal operation and maintenance monitoring and acquisition device, such as... Figure 2 As shown, it includes: an isolation acquisition circuit 4, a first RJ45 interface 1, a second RJ45 interface 2, a controller 5, a resistor divider circuit 6, a network transformer 7, a PoE power supply module 8, and a jumper module 9; the controller 5 is connected to the isolation acquisition circuit 4; the first RJ45 interface 1 is connected to the second RJ45 interface 2 or the network transformer 7 through the jumper module 9; the controller 5 is connected to the network transformer 7 and the second RJ45 interface 2; the resistor divider circuit 6 is connected to the first RJ45 interface 1 and the jumper module 9; the first RJ45 interface 1 is connected to the upper-layer network device, and the second RJ45 interface 2 is connected to the serial device; the PoE power supply module 8 is connected to the first RJ45 interface 1 through the jumper module 9; the PoE power supply module 8 is connected to the second RJ45 interface 2.

[0023] The PoE power supply module 8 can use the PoE9700 chip or other circuit modules with the same function. It extracts 48V DC power from the network cable and converts it to 12V or 24V via a DC-DC step-down circuit. This power supply not only powers its own module but also provides power to downstream node modules, ensuring a stable power supply for the entire subway signal operation and maintenance monitoring and acquisition device. Since the subway signal operation and maintenance monitoring and acquisition device only needs to acquire electrical signals, its power consumption is low, with a single module's power controllable to around 1W. However, the PoE protocol's power supply capability is generally above 15W. Therefore, connecting multiple modules in series can fully meet the requirements, ensuring power supply stability during system expansion. Even during series expansion, the system can still operate normally.

[0024] The first RJ45 interface 1 and the second RJ45 interface 2 are used for daisy-chain networking. The two interfaces integrate communication and power supply access. The first RJ45 interface 1 can be set to protocol conversion mode or data acquisition mode through the jumper module 9. The internal communication path of the subway signal operation and maintenance monitoring data acquisition device can be controlled through the jumper module 9.

[0025] like Figure 3 As shown, the jumper module 9 includes: eight switches; the second pins of the eight switches are all connected to the first RJ45 interface 1; the first pins of the eight switches are all connected to the second RJ45 interface 2; the third pins of the first switch SW1, the second switch SW2, the third switch SW3, and the sixth switch SW6 are connected to the network transformer 7; the third pins of the fourth switch SW4, the fifth switch SW5, the seventh switch SW7, and the eighth switch SW8 are connected to the PoE power supply module 8.

[0026] Furthermore, this utility model also includes: a voltage conversion circuit 11; the input terminal of the voltage conversion circuit 11 is connected to the POE power supply module 8, and the output terminal is connected to the controller 5, the resistor voltage divider circuit 6, and the network transformer 7.

[0027] like Figure 4 As shown, the voltage conversion circuit 11 includes: a first step-down chip U7, a second step-down chip U8, and a first resistor R1; the POE power supply module 8 is connected to the first step-down chip through the first resistor R1, and the first step-down chip U7 is connected to the controller 5, the resistor voltage divider circuit 6, and the network transformer 7 through the second step-down chip U8.

[0028] like Figure 5 As shown, the PoE power supply module is connected to the first RJ45 interface 1 via jumper module 9; the output terminal of the PoE power supply module is connected to the second RJ45 interface 2 and the network transformer 7; the PoE power supply module is connected to the voltage conversion circuit 11 via the first diode D1 to output 12V voltage.

[0029] Furthermore, the resistor divider circuit 6 includes: a second resistor R2, a third resistor R3, a capacitor C, and a second diode D2; the controller 5 is connected to the second pin of the eighth switch SW8 through the second resistor R2; the controller 5 is grounded through the third resistor R3, and the capacitor C is connected in parallel with the third resistor R3; the controller 5 is connected to the voltage conversion circuit 11 through the second diode D2.

[0030] like Figure 6 As shown, this utility model also includes: an RS485 circuit 10; the second RJ45 interface 2 is connected to the controller 5 through the RS485 circuit 10.

[0031] The present invention will be further explained in conjunction with the specific working process, as follows: Mode switching jumper: To switch the operating mode of the first RJ45 interface 1, the physical jumper of jumper module 9 is used as a configuration method. The jumper has 3 bits. The middle pin (i.e., the second pin) of the switch in jumper module 9 is connected to the first RJ45 interface 1, and the two sides are connected to the PoE circuit and the second RJ45 interface 2 respectively. When the switch is connected to the second RJ45 interface 2, the bus connection of the acquisition node is realized, supporting serial communication and power supply. At this time, the metro signal operation and maintenance monitoring acquisition device is used as a normal acquisition node in acquisition mode. The first RJ45 interface 1 and the second RJ45 interface 2 are directly connected for daisy-chain networking. Adjacent metro signal operation and maintenance monitoring acquisition devices are connected in series through the first RJ45 interface 1 and the second RJ45 interface 2, so that all acquisition modules are connected to the communication bus and the power bus. The controller 5 focuses on data acquisition and uses RS485 / CAN for external communication. When the jumper is connected to the POE power supply module 8, the controller 5 provides protocol conversion function in addition to data acquisition, realizing bidirectional protocol conversion between the network port (first RJ45 interface 1) and the RS485 / CAN bus (second RJ45 interface 2).

[0032] Data Acquisition Mode: The operation data of the subway signaling equipment, such as the current of the switch machine and the lighting status of the signal lights, are acquired through the isolation acquisition circuit 4. This data is first temporarily stored in the controller 5. The controller 5 transmits the data to the communication bus according to the instructions received on the serial bus (first RJ45 port). The data on the bus is converted into network data through the protocol conversion node and transmitted to the monitoring station in the monitoring cabinet for analysis and processing.

[0033] The jumper module 9 has 8 switches, corresponding to the 8 pins of the RJ45 interface. Among them, the 8th pin has a dual function: it is used for mode switching and mode detection.

[0034] Mode detection principle: The jumper voltage is divided to 1 / 8 of its original value by the resistor divider circuit 6 (second resistor R2, third resistor R3). Controller 5 detects this divided voltage value through controller 5C. If the detected voltage is 1.5V: the module enters protocol conversion mode; for other voltage values: the module defaults to acquisition mode. This design enables flexible switching of hardware modes while simplifying the control logic.

[0035] Protocol Conversion Mode: In protocol conversion mode, the first RJ45 interface 1 connects to the upper-layer network, such as network devices within the monitoring cabinet, enabling communication with the monitoring system. The second RJ45 interface 2 outputs RS485 / CAN signals for connecting to traditional serial devices. This mode can also handle data acquisition tasks, maximizing the application of hardware functionality. This method achieves data interaction and integration between devices using different communication protocols.

[0036] The practical application of this utility model's subway signal operation and maintenance monitoring and acquisition device is as follows: Figure 7 As shown, the metro signal operation and maintenance monitoring and acquisition device is placed in the monitoring interface cabinet. After multiple metro signal operation and maintenance monitoring and acquisition devices are networked, each metro signal operation and maintenance monitoring and acquisition device is a node, and multiple nodes are powered by PoE.

[0037] In summary, this utility model has the following technical effects: 1. The PoE power supply module is adopted to realize the integration of power supply and communication. The communication line and the power line are combined into one cable, which facilitates the construction and reduces the physical wiring workload by more than 50%, and there is no need to lay additional power lines. 2. Because PoE power supply is used, a PoE switch is required. There is no need to install a power supply in the monitoring cabinet, thus combining the power supply and the switch. This reduces the number of equipment types by 30% and significantly reduces system complexity. 3. The wiring adopts an RJ45 interface, which can be directly connected with a network cable. Pre-made network cables of different lengths are readily available, which can reduce the chance of errors in wiring or connection and improve debugging efficiency. 4. Hardware standardization design: The same module can be set to "acquisition mode" or "protocol conversion mode" via jumper module (used for the first node, converting the serial bus of the subsequent nodes to Ethernet), so that the acquisition module hardware is uniform and easy to maintain and replace.

[0038] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A subway signal operation and maintenance monitoring and acquisition device, characterized in that, include: Isolation acquisition circuit, first RJ45 interface, second RJ45 interface, controller, resistor voltage divider circuit, network transformer, PoE power supply module; The controller is connected to the isolated acquisition circuit; The first RJ45 interface is connected to the second RJ45 interface or the network transformer via a patch cord module; The controller is connected to the network transformer and the second RJ45 interface; The resistor voltage divider circuit is connected to the first RJ45 interface and the jumper module; The first RJ45 interface is connected to an upper-layer network device or a serial device, and the second RJ45 interface is connected to a serial device. The PoE power supply module is connected to the first RJ45 interface via the jumper module; The POE power supply module is connected to the second RJ45 interface.

2. The subway signal operation and maintenance monitoring and acquisition device according to claim 1, characterized in that, The jumper module includes: eight switches; The second pin of each of the eight switches is connected to the first RJ45 interface; The first pin of each of the eight switches is connected to the second RJ45 interface; The third pins of the first switch, the second switch, the third switch, and the sixth switch are connected to the network transformer; The third pins of the fourth, fifth, seventh, and eighth switches are connected to the PoE power supply module.

3. The subway signal operation and maintenance monitoring and acquisition device according to claim 2, characterized in that, Also includes: Voltage conversion circuit; The input terminal of the voltage conversion circuit is connected to the POE power supply module, and the output terminal is connected to the controller, the resistor divider circuit, and the network transformer.

4. The subway signal operation and maintenance monitoring and acquisition device according to claim 3, characterized in that, The voltage conversion circuit includes: a first step-down chip, a second step-down chip, and a first resistor; The PoE power supply module is connected to the first step-down chip through the first resistor, and the first step-down chip is connected to the controller, the resistor divider circuit, and the network transformer through the second step-down chip.

5. The subway signal operation and maintenance monitoring and acquisition device according to claim 3, characterized in that, The resistor voltage divider circuit includes: a second resistor, a third resistor, a capacitor, and a second diode; The controller is connected to the second pin of the eighth switch via the second resistor; The controller is grounded through the third resistor, and the capacitor is connected in parallel with the third resistor; The controller is connected to the voltage conversion circuit via the second diode.

6. The subway signal operation and maintenance monitoring and acquisition device according to claim 4, characterized in that, Also includes: RS485 circuit; The second RJ45 interface is connected to the controller via the RS485 circuit.

Images