Intelligent diagnosis system for interrail electrical connection state of railway passenger train preparation depot

Abstract

The utility model discloses a railway passenger train preparation depot interrail electrical connection state intelligent diagnosis system, include: electrical safety intelligent diagnosis unit, set up in the track end, set up in the track to be measured section's several rail edge collection unit is connected with electrical safety intelligent diagnosis unit, electrical safety intelligent diagnosis unit and rail edge collection unit constitute electric energy detection circuit, and the electrification of track is judged through the voltage detection of track, electrical safety intelligent diagnosis unit and rail edge collection unit constitute four -wire method circuit, and the connection integrity of track is judged through the resistance detection of track. The utility model discloses through the configuration rail edge collection unit and electrical safety intelligent diagnosis unit, can automatically pass through four -wire method and carry out track resistance test to the integrity of the rail connection according to the test result evaluation, thereby effectively saved manpower and material resources, and the time needed in traditional method has been reduced in line resistance correction, has promoted the accuracy and reliability of test.

Description

Technical Field

[0001] This utility model belongs to the field of railway electrical technology, specifically relating to an intelligent diagnostic system for the electrical connection status between tracks in a railway passenger car maintenance depot. Background Technology

[0002] In railway transportation systems, rails play a crucial role in supporting trains and guiding the wheels forward. Currently, before a train enters the maintenance depot for repairs, maintenance workers must inspect the rails to ensure their integrity. If rails are broken or incompletely connected, the train's entry into the depot could lead to derailment, overturning, or other serious traffic accidents, causing casualties and substantial property damage. Therefore, effective track monitoring and timely detection and repair of track damage are essential to maximizing railway operational safety.

[0003] Real-time track breakage monitoring involves using a monitoring system to monitor railway tracks using methods such as optical fiber, acoustic emission, ultrasonic guided waves, or resistive strain gauges, but all of these methods have certain limitations.

[0004] The invention patent CN101351373B, entitled "System and Method for Detecting Rail Breakage or Vehicles," discloses a method for detecting rail breakage in a rail track section, comprising: applying voltage across a section having multiple regions via multiple voltage sources, each of the multiple voltage sources being coupled to one of the multiple regions; measuring a first set of values ​​of an indicator current, each of the first set of values ​​corresponding to one of the multiple regions; switching the polarity of each voltage source; measuring a second set of values ​​of the indicator current, each of the second set of values ​​corresponding to one of the multiple regions; and monitoring the change between the first set of values ​​and the second set of values ​​to detect the presence of rail breakage in the section.

[0005] However, the above invention has the following problems: the voltage source is sensitive to load changes. Although the output voltage of the voltage source is stable, its output current will change with the change of load resistance, which may cause other parameters in the circuit to change. As the section length becomes longer, the total resistance of the track circuit changes due to the addition of the inter-track resistance between each track. Therefore, line resistance correction is required before measurement to prevent the line resistance from interfering with the measurement results.

[0006] To address the aforementioned technical problems in the existing technology, this utility model provides an intelligent diagnostic system for the electrical connection status between tracks in a railway passenger car maintenance depot. Utility Model Content

[0007] The present invention adopts the following technical solution:

[0008] This utility model provides an intelligent diagnostic system for the electrical connection status between rails in a railway passenger car maintenance depot. The intelligent diagnostic system for the electrical connection status between rails in a railway passenger car maintenance depot includes:

[0009] An intelligent electrical safety diagnostic unit is installed at the end of the track.

[0010] Several trackside data acquisition units are installed in the track section to be tested, and the trackside data acquisition units are connected to the electrical safety intelligent diagnostic unit;

[0011] The electrical safety intelligent diagnostic unit and the trackside acquisition unit constitute an electrical energy detection circuit. The electrical energy detection circuit determines the energization status of the track by detecting the voltage of the track.

[0012] The electrical safety intelligent diagnostic unit and the trackside acquisition unit constitute a four-wire circuit. The four-wire circuit determines the connection integrity of the track by detecting the resistance of the track.

[0013] Furthermore, the intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks also includes a local control terminal and a remote control terminal.

[0014] Furthermore, the trackside data acquisition unit includes: an electrical energy detection device and a resistance detection device.

[0015] Furthermore, the power detection device includes:

[0016] The first high-voltage contact connecting the rail;

[0017] A retractable first electric push rod is provided with a second high-voltage contact. When the retractable first electric push rod is extended, the second high-voltage contact is connected to the first high-voltage contact, and the second high-voltage contact is connected to the electrical safety intelligent diagnostic unit.

[0018] A current release module is used to release the strong current on the track, and the current release module is disposed on the first electric push rod.

[0019] Furthermore, any one of the aforementioned power detection devices includes two first high-voltage contacts, one first electric push rod, and one second high-voltage contact.

[0020] Furthermore, the resistance detection device includes:

[0021] The first low-voltage contact of the connecting rail;

[0022] A retractable second electric actuator is provided, wherein a second low-voltage contact is provided on the retractable second electric actuator. When the retractable second electric actuator is extended, the second low-voltage contact is connected to the first low-voltage contact, and the second low-voltage contact is connected to the electrical safety intelligent diagnostic unit.

[0023] Furthermore, the resistance detection device also includes an insulating column.

[0024] Furthermore, any of the aforementioned resistance detection devices includes four first low-voltage contacts, two second electric push rods, and four second low-voltage contacts;

[0025] Each of the second electric actuators is provided with two second low-pressure contacts.

[0026] Furthermore, the electrical safety intelligent diagnostic unit includes:

[0027] A voltage acquisition device, wherein the voltage acquisition device is connected to the power detection device;

[0028] The main control board is used to control the voltage acquisition device, the ground core dial, and the railside acquisition unit.

[0029] A core dial is connected to the resistance detection device.

[0030] Furthermore, the electrical safety intelligent diagnostic unit also includes a power supply.

[0031] Compared with the prior art, the superior effects of this utility model are as follows:

[0032] 1. The intelligent diagnostic system for the electrical connection status between rails in a railway passenger car maintenance depot, as described in this utility model, can automatically test the resistance of the rails and determine the integrity of the rail connection by setting up a railside acquisition unit and an electrical safety intelligent diagnostic unit, thus saving manpower and material resources.

[0033] 2. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks described in this utility model uses a four-wire method to measure resistance and assess the integrity of track connections, which can significantly improve accuracy, reliability and frequency response range.

[0034] 3. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks described in this utility model adopts a four-wire connection method, which can effectively eliminate the interference of the test system and the contact resistance and lead resistance of the measured resistor on the measurement results, save the time required for line resistance correction in traditional methods, and thus improve the accuracy and reliability of the test. Attached Figure Description

[0035] Figure 1This is an exploded view of the structure of the intelligent diagnostic system for the electrical connection status between rails in a railway passenger car preparation depot, as described in this utility model.

[0036] Figure 2 This is a schematic diagram of the circuit structure for measuring track resistance using the four-wire method of an intelligent diagnostic system for the electrical connection status between rails in a railway passenger car maintenance depot, as described in this utility model.

[0037] Figure 3 This is a circuit diagram of the electrical safety intelligent diagnostic unit of the intelligent diagnostic system for the electrical connection status between rails in a railway passenger car preparation depot, as described in this utility model.

[0038] Figure 4 This is a schematic diagram of the electrical energy and resistance structure connection of the intelligent diagnostic system for the electrical connection status between rails in a railway passenger car preparation depot, as described in this utility model.

[0039] Figure 5 This is a schematic diagram of the trackside data acquisition unit structure of the intelligent diagnostic system for the electrical connection status between rails in a railway passenger car preparation depot, as described in this utility model.

[0040] Figure 6 This is a schematic diagram illustrating the operation process of detecting the integrity of rail connections using the intelligent diagnostic system for the electrical connection status between rails in a railway passenger car maintenance depot.

[0041] The diagram shows: 1-Electrical safety intelligent diagnostic unit, 2-Railside acquisition unit, 3-First electric push rod, 4-Second high-voltage contact, 5-Current release module, 6-Second electric push rod, 7-Second low-voltage contact, 8-First high-voltage contact, 9-First low-voltage contact. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0043] Example

[0044] The aforementioned intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks is used to detect the integrity of the rail connections in the railway train maintenance depot, ensuring that the rails will not break or be incompletely connected, and preventing accidents such as derailment and overturning when trains enter the maintenance depot, which could cause casualties and property damage.

[0045] like Figures 1-6 As shown, the intelligent diagnostic system for the electrical connection status between rails in a railway passenger car preparation depot includes: a railside data acquisition unit 2, an electrical safety intelligent diagnostic unit 1, a local control terminal, and a remote control terminal.

[0046] like Figure 1 As shown, the electrical safety intelligent diagnostic unit 1 is located at the end of the track; several trackside acquisition units 2 are arranged in pairs on both sides of the track section to be tested; the local control terminal is connected to the electrical safety intelligent diagnostic unit 1, the trackside acquisition units 2 are connected to the electrical safety intelligent diagnostic unit 1 by telecommunications, and the remote control terminal is connected to the local control terminal by telecommunications.

[0047] The electrical safety intelligent diagnostic unit 1 and the trackside acquisition unit 2 constitute an electrical energy detection circuit. The electrical energy detection circuit determines the energization status of the track by detecting the voltage of the track. The electrical safety intelligent diagnostic unit 1 and the trackside acquisition unit 2 constitute a four-wire circuit. The four-wire circuit determines the connection integrity of the track by detecting the resistance of the track.

[0048] like Figure 2 As shown, the four-wire method circuit is particularly suitable for measuring low-value resistances similar to rails. A constant current power supply provides current to the low-value resistor under test through two current leads, while a digital voltmeter measures the potential difference U formed on the low-value resistor under test by the current supplied by the constant current power supply through two voltage leads. The two current leads are set outside the two voltage leads, which can eliminate the influence of the contact resistance of the current leads and the lead resistance on the measurement. The input impedance of the digital voltmeter is set to be high, and the influence of the contact resistance of the voltage leads and the lead resistance on the measurement can be ignored. Measuring the resistance of rails using the four-wire method can eliminate the line resistance correction process in traditional methods.

[0049] In one specific embodiment, the railway train maintenance depot has a double-track track with a total length of 500m. Each rail section is 25m long, with 20 sections on each side, for a total of 40 sections. The rails are all fastened together by metal fishplate bolts. Two electrical safety intelligent diagnostic units 1 are set at the end of each track. Railside acquisition units 2 are set in pairs on both sides of the middle of each rail section.

[0050] The trackside data acquisition unit 2 includes: an energy detection device for measuring track voltage and a resistance detection device for measuring track resistance;

[0051] like Figures 3-4 As shown, the electrical safety intelligent diagnostic unit 1 includes: a voltage acquisition device, a main control board, a ground core dial, a power supply, and a drive board; the local control terminal is connected to the main control board in the electrical safety intelligent diagnostic unit 1, the main control board is connected to the ground core dial, the power supply, and the drive board, the power detection device is connected to the voltage acquisition device and the drive board, and the resistance detection device is connected to the ground core dial and the drive board.

[0052] The local control terminal and the remote control terminal control the main control board in the electrical safety intelligent diagnostic unit 1. The main control board controls the voltage acquisition device, the ground core dial, and the drive board according to the pre-set program. The drive board controls the power detection device and the resistance detection device according to the instructions of the main control board.

[0053] In one specific embodiment, Figure 3 The circuit structure of the electrical safety intelligent diagnostic unit 1 is shown. The electrical safety intelligent diagnostic unit 1 is also equipped with a 75W switching power supply for powering the electrical safety intelligent diagnostic unit 1. The main control board uses STM32 as the core MCU and has external RS232, RS485, USB and LAN interfaces. It is responsible for receiving commands from the local control terminal, controlling the voltage acquisition device, the ground core dial, and the driver board, and interacting with the ground core dial and the voltage acquisition device to upload data to the local control terminal.

[0054] In one specific embodiment, the specific structural connection method of an intelligent diagnostic system for the electrical connection status between rails in a railway passenger car maintenance depot is as follows: Figure 4 As shown, the remote control terminal connects to the local control terminal via LAN or wireless network, and the local control terminal connects to the main control board in the electrical safety intelligent diagnostic unit 1 via LAN or wireless network. The main control board connects to the voltage acquisition device, ground core dial, and drive board via Modbus-485 communication protocol. The electrical safety intelligent diagnostic unit 1 connects to the railside acquisition unit 2 via wiring unit.

[0055] like Figure 5 As shown, the trackside acquisition unit 2 includes: an electrical energy detection device and a resistance detection device;

[0056] The power detection device includes: a first high-voltage contact 8, a retractable first electric push rod 3, a second high-voltage contact 4, and a current release module 5.

[0057] The first high-voltage contact 8 is connected to the rail, the second high-voltage contact 4 is mounted on the first electric push rod 3, the current release module 5 is mounted on the first electric push rod 3, and the second high-voltage contact 4 is connected to the electrical safety intelligent diagnostic unit 1.

[0058] When the first electric push rod 3 extends, the second high-voltage contact 4 connects to the first high-voltage contact 8, activating the power detection circuit. When the first electric push rod 3 retracts, the power detection circuit is disconnected. The track, the first high-voltage contact 8, the second high-voltage contact 4, and the electrical safety intelligent diagnostic unit 1 are connected to form a power detection circuit to detect the voltage of the track and determine the energization status of the track. The current release module 5 is used to release the strong current on the track to prevent the strong current on the track from damaging the trackside acquisition unit 2 and the electrical safety intelligent diagnostic unit 1.

[0059] The power detection circuit is used to determine the energization status of the track. The rails connected to the depot may become energized for various reasons, such as acting as a track circuit to detect whether a train is occupying the track, or releasing the traction current of a high-speed train. The power detection circuit can detect whether the depot track is correctly connected to the external track, and whether the depot track has made incorrect contact with a energized object. The energization of the track will affect the accuracy of the resistance measurement. Therefore, detecting the energization status of the track is a necessary preliminary step.

[0060] The resistance detection device includes: a first low-voltage contact 9, a second low-voltage contact 7, a second electric push rod 6, and an insulating column;

[0061] The first low-voltage contact 9 is connected to the rail, the second low-voltage contact 7 is mounted on the second electric push rod 6, and the second low-voltage contact 7 is connected to the electrical safety intelligent diagnostic unit 1.

[0062] When the second electric push rod 6 extends, the second low-voltage contact 7 connects to the first low-voltage contact 9. The rail, the first low-voltage contact 9, the second low-voltage contact 7, and the electrical safety intelligent diagnostic unit 1 are connected to form a four-wire circuit to detect the resistance of the rail. When the second electric push rod 6 retracts, the four-wire circuit is disconnected. The insulating column receives instructions from the electrical safety intelligent diagnostic unit 1 to divide the rail into several independent sections, forming multiple independent circuit systems, which facilitates more accurate resistance testing.

[0063] In one specific embodiment, any electrical energy detection device includes two first high-voltage contacts 8, one first electric actuator 3, and one second high-voltage contact 4; two first high-voltage contacts 8 are provided on the track side to prevent excessive instantaneous current passing through the first high-voltage contacts 8 from damaging them. Any resistance detection device includes four first low-voltage contacts 9, two second electric actuators 6, and four second low-voltage contacts 7, with two second low-voltage contacts 7 provided on each second electric actuator 6. This embodiment tests the resistance of the track using a four-wire method, therefore two second electric actuators 6 are provided, one connected to a constant current source in the ground core dial, and the other connected to a voltmeter in the ground core dial.

[0064] By setting up two electric push rods, the track section to be tested can be selected, eliminating the need for staff to manually connect circuits multiple times to test resistance, thus saving manpower and resources.

[0065] The following sections briefly describe the operation procedures for measuring the integrity of the track connection from the end of the track to a specific track section and for automatically measuring the integrity of the entire track connection.

[0066] 1. The operational procedure for measuring the integrity of the connection from the end of the track to a specific track section, such as... Figure 6 As shown:

[0067] The staff clicks to measure the corresponding track section on the local control terminal, and the local control terminal sends the measurement command to the main control board in the electrical safety intelligent diagnostic unit 1.

[0068] The main control board controls the corresponding railside detection unit to raise the first electric push rod 3, connects the power detection circuit, and starts testing the voltage.

[0069] The voltage acquisition device in the local control terminal starts voltage detection. The voltage acquisition device feeds back the detected voltage value to the main control board. If the main control board determines that the voltage value exceeds the threshold, it feeds back to the local control terminal and the local control terminal alarms. If the main control board determines that the voltage value does not exceed the threshold, it lowers the first electric push rod 3, raises the second electric push rod 6, and connects the four-wire circuit.

[0070] The main control board in the electrical safety intelligent diagnostic unit 1 sends a measurement command to control the ground core dial in the electrical safety intelligent diagnostic unit 1 to perform resistance measurement. After the measurement is completed, the data is fed back to the main control board.

[0071] The main control board sends a command to end the measurement, lowers the second electric push rod 6, and sends the resistance measurement data to the local control terminal. The local control terminal compares the measured resistance value with the set resistance value threshold. If the value exceeds the threshold, an alarm is triggered.

[0072] 2. Operation procedure for automatically measuring the integrity of the entire track connection:

[0073] The local control terminal sends a one-click measurement command to the main control board;

[0074] The main control board sends commands according to the binary search logic to control the operation process in the trackside detection unit to measure the integrity of the connection between the end of the track and the corresponding section of the track.

[0075] After locating the fault point, the local control terminal will issue a fault alarm.

[0076] It should be noted that the intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks described in this utility model uses a four-wire method to measure resistance and assess the integrity of track connections, featuring high precision, high reliability, and a wide frequency response range. This connection method effectively eliminates interference from the test system and the contact resistance and lead resistance of the measured resistor on the measurement results, and further saves the time required for line resistance correction using traditional methods.

[0077] This utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims.

Claims

1. An intelligent diagnostic system for the electrical connection status between tracks in a railway passenger car maintenance depot, characterized in that, include: An intelligent electrical safety diagnostic unit is installed at the end of the track. Several trackside data acquisition units are installed in the track section to be tested, and the trackside data acquisition units are connected to the electrical safety intelligent diagnostic unit; The electrical safety intelligent diagnostic unit and the trackside acquisition unit constitute an electrical energy detection circuit. The electrical energy detection circuit determines the energization status of the track by detecting the voltage of the track. The electrical safety intelligent diagnostic unit and the trackside acquisition unit constitute a four-wire circuit. The four-wire circuit determines the connection integrity of the track by detecting the resistance of the track.

2. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks according to claim 1, characterized in that, The intelligent diagnostic system for the electrical connection status between tracks in the railway passenger car preparation depot also includes a local control terminal and a remote control terminal.

3. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks according to claim 1, characterized in that, The trackside data acquisition unit includes: a power detection device and a resistance detection device.

4. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks according to claim 3, characterized in that, The power detection device includes: The first high-voltage contact connecting the rail; A retractable first electric push rod is provided with a second high-voltage contact. When the retractable first electric push rod is extended, the second high-voltage contact is connected to the first high-voltage contact, and the second high-voltage contact is connected to the electrical safety intelligent diagnostic unit. A current release module is used to release the strong current on the track, and the current release module is disposed on the first electric push rod.

5. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks according to claim 4, characterized in that, Each of the aforementioned power detection devices includes two first high-voltage contacts, one first electric push rod, and one second high-voltage contact.

6. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks according to claim 3, characterized in that, The resistance detection device includes: The first low-voltage contact of the connecting rail; A retractable second electric actuator is provided, wherein a second low-voltage contact is provided on the retractable second electric actuator. When the retractable second electric actuator is extended, the second low-voltage contact is connected to the first low-voltage contact, and the second low-voltage contact is connected to the electrical safety intelligent diagnostic unit.

7. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks according to claim 6, characterized in that, The resistance detection device also includes an insulating column.

8. The intelligent diagnostic system for the electrical connection status between tracks in a railway passenger car maintenance depot according to claim 6, characterized in that, Any of the aforementioned resistance detection devices includes four first low-voltage contacts, two second electric push rods, and four second low-voltage contacts; Each of the second electric actuators is provided with two second low-pressure contacts.

9. The intelligent diagnostic system for the electrical connection status between railway passenger car maintenance depot tracks according to claim 3, characterized in that, The electrical safety intelligent diagnostic unit includes: A voltage acquisition device, wherein the voltage acquisition device is connected to the power detection device; The main control board is used to control the voltage acquisition device and the railside acquisition unit; A core dial is connected to the resistance detection device.

10. The intelligent diagnostic system for the electrical connection status between tracks in a railway passenger car maintenance depot according to claim 9, characterized in that, The electrical safety intelligent diagnostic unit also includes a power supply.

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