Railway cable parameter detection recorder

Abstract

The application discloses a railway cable parameter detection recorder, which comprises a first test port and a second test port, a bridge circuit connected with the first test port, a switching interface connected with the second test port, an oscilloscope circuit connected with the switching interface and an isolation module, a megohmmeter circuit connected with the switching interface and the oscilloscope circuit, a test mode switching circuit connected with the bridge circuit, the oscilloscope circuit, the isolation module and the switching interface, and a man-machine interface connected with the test mode switching circuit and the switching interface. The scheme has high integration, simple operation, strong professionalism, complete functions and the function of uploading data on a network.

Description

Technical Field

[0001] This application relates to the field of railway cable equipment technology, and in particular to a railway cable parameter detection recorder. Background Technology

[0002] Railway cables, divided into signal cables and power cables, are an indispensable component of the railway system, undertaking the vital tasks of transmitting signals, control commands, and supplying power. With the rapid development of railway transportation, the safety, stability, and maintenance of these cables have become particularly important. Therefore, monitoring the normal operation of these cables is crucial for preventing accidents and improving safety.

[0003] Common fault types in railway cables include insulation damage, sheath breakage, poor contact, and short circuits. Therefore, regular parameter testing and maintenance of railway cables are necessary. Testing methods mainly include resistance testing, insulation resistance testing, capacitance testing, signal frequency response testing, high-frequency signal testing, and crosstalk voltage testing. These tests are complex and require many tools, such as multimeters, megohmmeters, and oscilloscopes. Various inspection and testing tools must be carried during routine inspections or fault repairs, and many tools require periodic maintenance and calibration. Some also require mains power, which is particularly demanding in the complex environment of railways, causing numerous inconveniences for maintenance personnel and affecting testing efficiency. Utility Model Content

[0004] An embodiment of this application provides a railway cable parameter detection recorder.

[0005] To achieve the above objectives, embodiments of this application provide a railway cable parameter detection recorder, including: a first test port and a second test port;

[0006] The bridge circuit is connected to the first test port;

[0007] Switch the interface and connect it to the second test port;

[0008] Oscilloscope circuitry, connected to the switching interface and isolation module;

[0009] Megohmmeter circuit, connected to the switching interface and oscilloscope circuit;

[0010] The test mode switching circuit is connected to the bridge circuit, oscilloscope circuit, isolation module, and switching interface;

[0011] The human-machine interface is connected to the test mode switching circuit and the switching interface.

[0012] In one embodiment, the test mode switching circuit includes a control processing module, a third relay, a fourth relay, and a fifth relay; the control processing module is connected to the third relay, the fourth relay, and the fifth relay.

[0013] The third relay is connected to the switching interface, the fourth relay is connected to the isolation module, and the fifth relay is connected to the bridge circuit.

[0014] In one embodiment, the switching interface includes a first relay and a second relay;

[0015] The first relay is connected to the oscilloscope circuit, and the second relay is connected to the megohmmeter circuit.

[0016] In one embodiment, the human-machine interface includes a main control board and a display, and the main control board, the display, the test mode switching circuit, and the switching interface are all connected.

[0017] In one embodiment, the isolation module is a circuit acquisition module that converts voltages within 1000V into linear variations of 0-10V.

[0018] In one embodiment, the power supply voltage of the isolation module is 12V, and the isolation withstand voltage rating is 2000V.

[0019] In one embodiment, it further includes a mobile terminal connected to a human-machine interface.

[0020] This application has the following advantages over the prior art:

[0021] The railway cable parameter testing recorder provided in this application integrates commonly used maintenance and testing tools required in the process of railway cable testing and maintenance, such as bridge circuits, oscilloscope circuits, megohmmeter circuits, etc., with a high degree of integration; it can provide accurate measurement and testing according to the actual testing needs of railway cables.

[0022] The railway cable parameter detection recorder provided in this application is simple to operate, highly professional, and fully functional. It is suitable for parameter detection work of signal cables or low-voltage power cables in railway departments or other maintenance and construction departments, and can improve detection and analysis efficiency.

[0023] The railway cable parameter testing recorder provided in this application can upload test data to a local area network, which facilitates data management of the entire system and thus better serves the railway signaling system. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a structural block diagram of the railway cable parameter detection recorder according to an embodiment of this application;

[0026] Figure 2 This is a detailed connection diagram of the railway cable parameter detection recorder according to an embodiment of this application;

[0027] Figure 3 This is an equivalent model diagram of the railway cable in the railway cable parameter detection recorder of this application embodiment. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can refer to fixed connection, detachable connection, or integral connection; for those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] Reference Figure 1 , Figure 2 It illustrates an embodiment of a railway cable parameter detection recorder provided in this application, wherein, Figure 1 This is a structural block diagram of a railway cable parameter detection recorder. Figure 2 This is a detailed connection diagram for the railway cable parameter detection recorder.

[0033] like Figure 1 , Figure 2 As shown, an embodiment of this application provides a railway cable parameter detection recorder, including: a first test port 1 and a second test port 2;

[0034] Bridge circuit 3 is connected to the first test port 1;

[0035] Switch interface 4 to connect to the second test port 2;

[0036] Oscilloscope circuit 5 is connected to switching interface 4 and isolation module 9;

[0037] Megohmmeter circuit 6 is connected to switching interface 4 and oscilloscope circuit 5;

[0038] The test mode switching circuit 7 is connected to the bridge circuit 3, the oscilloscope circuit 5, the isolation module 9, and the switching interface 4.

[0039] The human-machine interface 8 is connected to the test mode switching circuit 7 and the switching interface 4.

[0040] Specifically, the megohmmeter circuit 6 is connected to the oscilloscope circuit 5. That is, the megohmmeter circuit 6 can send the measured data to the oscilloscope circuit 5, and the oscilloscope circuit 5 sends the received data to the test mode switching circuit 7. The megohmmeter circuit 6 can also directly send the measured data to the test mode switching circuit 7. Therefore, the test mode switching circuit 7 can also be connected to the megohmmeter circuit 6 (not shown in the figure). The test mode switching circuit 7 is connected to the bridge circuit 3, oscilloscope circuit 5, megohmmeter circuit 6, and human-machine interface 8 via serial communication. Half-duplex communication is performed via TXD and RXD, and shielding is implemented to improve stability and data accuracy.

[0041] The resistance (loop resistance) and capacitance, inductance, and other parameters of the railway cable are measured using a bridge circuit 3 through the first test port 1. The bridge circuit 3 can use a four-wire bridge test method to measure the loop resistance, capacitance, inductance, and other parameters of the cable. The insulation value of the railway cable to ground or to a phase is measured using an oscilloscope circuit 5 or a megohmmeter circuit 6 through the second test port 2. It can also measure the voltage value of a certain line or the crosstalk voltage. The megohmmeter circuit 6 can use a digital insulation meter to measure the insulation value of the cable, and the oscilloscope can display the voltage or crosstalk voltage of the railway cable during operation.

[0042] The test mode switching circuit 7 allows selection of whether to use the bridge circuit 3 or the oscilloscope circuit 5 and megohmmeter circuit 6 for testing. The switching interface 4 allows switching between using the megohmmeter circuit 6 to measure insulation and the oscilloscope circuit 5 to measure voltage waveforms, as their physical interfaces differ. The measured voltage waveform is displayed on the human-machine interface 8. The human-machine interface 8 can also display other information such as the recorder's test mode. The human-machine interface 8 includes the main control board and a display, which are connected to the test mode switching circuit 7 and the switching interface 4. The display can be a liquid crystal touchscreen, for example, a 4.3-inch liquid crystal touchscreen, model DMT48270T043. Users can operate the device using the touchscreen keys. The main control board's microcontroller chip can be model STC32G12K128.

[0043] Among them, the equivalent model of railway cables is as follows: Figure 3 As shown, it consists of L (inductive component of the line), R (loop resistance), G (line conductance), and C (line capacitance). When measuring with the railway cable parameter detection recorder provided in this embodiment, these values ​​of the cable are measured and calculated based on this characteristic of the railway cable, and these parameters are directly displayed through the human-machine interface 8.

[0044] The railway cable parameter detection recorder provided in this embodiment is a specialized instrument designed for inspection and maintenance in the field of railway cable testing. It can monitor the voltage or crosstalk voltage of the railway cable cores online, and can also be used to test various parameters of the railway cable, such as loop resistance, inductance, capacitance, and insulation value. Before use, the user selects whether to monitor voltage online or measure parameters via the test mode switching circuit 7. Online voltage monitoring involves collecting the voltage from the second test port 2, while parameter measurement involves collecting the cable's resistance, capacitance, inductance, and other values ​​through the first test port 1. In voltage measurement mode, the cable's insulation value can be measured through the second test port 2. The human-machine interface 8 displays and stores the collected information.

[0045] In one embodiment, the railway cable parameter testing recorder further includes a mobile terminal 10 connected to the human-machine interface 8. The mobile terminal 10 can be a mobile phone or tablet computer, etc. The mobile terminal 10 can connect to the human-machine interface 8 via wireless Bluetooth, 4G, or 5G networks to transmit data. The mobile terminal 10 can receive information collected by the human-machine interface 8 through an app, remotely view it, and remotely send control commands to the human-machine interface 8. The app on the mobile terminal 10 can also upload the received information to the local area network of the circuit system and store it in the local area network's database, facilitating information aggregation by the railway system and filling a gap in the field of instruments specifically designed for testing railway cable parameters in China.

[0046] In one embodiment, the test mode switching circuit 7 includes a control processing module 71, a third relay 72, a fourth relay 73, and a fifth relay 74; the control processing module 71 is connected to the third relay 72, the fourth relay 73, and the fifth relay 74.

[0047] The third relay 72 is connected to the switching interface 4, the fourth relay 73 is connected to the isolation module 9, and the fifth relay 74 is connected to the bridge circuit 3.

[0048] Specifically, the main control microcontroller chip of the control processing module 71 can be model STC15W4K32S4. The third relay 72, the fourth relay 73, and the fifth relay 74 can be model HF-JQC-3FF-005.

[0049] When measuring railway cables using the first test port 1, the test mode switching circuit 7 drives the fifth relay 74K5 to close its contact via the control processing module 71, electrically connecting the control processing module 71 and the bridge circuit 3. The measurement mode is then set to resistance or capacitance measurement mode, and the human-machine interface 8 displays parameters such as the loop resistance, capacitance, or inductance of the railway cable. When measuring railway cables using the second test port 2, the test mode switching circuit 7 drives the third relay 72K3 and the fourth relay 73K4 to close their contacts via the control processing module 71, electrically connecting the control processing module 71 and the switching interface 4. The test mode is then switched to voltage or insulation measurement mode.

[0050] In one embodiment, the switching interface 4 includes a first relay 41 and a second relay 42;

[0051] The first relay 41 is connected to the oscilloscope circuit 5, and the second relay 42 is connected to the megohmmeter circuit 6.

[0052] Specifically, the first relay 41 and the second relay 42 can be of model number HF-JQC-3FF-005.

[0053] When the switching interface 4 is electrically connected to the test mode switching circuit 7, the main control board of the human-machine interface 8 sends signals to drive the first relay 41K1 or the second relay 42K2 to determine the measured voltage or insulation value. When the contact of the first relay 41K1 is closed, the oscilloscope circuit 5 measures the voltage; when the contact of the second relay 42K2 is closed, the megohmmeter circuit 6 measures the circuit insulation value. During voltage measurement, the voltage waveform can be displayed on the monitor and can be saved and uploaded to the mobile terminal 10, and then uploaded to the local area network system.

[0054] In one embodiment, the isolation module 9 is a circuit acquisition module that converts voltages within 1000V into linear variations of 0-10V. The power supply voltage of the isolation module 9 is 12V, and the isolation withstand voltage rating is 2000V.

[0055] It is understood that the bridge circuit 3, oscilloscope circuit 5, and megohmmeter circuit 6 in the above embodiments all adopt existing technologies, and will not be described in detail here.

[0056] The railway cable parameter testing recorder provided in this application integrates commonly used maintenance and testing tools required in the process of railway cable testing and maintenance, such as bridge circuits, oscilloscope circuits, megohmmeter circuits, etc., with a high degree of integration; it can provide accurate measurement and testing according to the actual testing needs of railway cables.

[0057] The railway cable parameter detection recorder provided in this application is simple to operate, highly professional, and fully functional. It is suitable for parameter detection work of signal cables or low-voltage power cables in railway departments or other maintenance and construction departments, and can improve detection and analysis efficiency.

[0058] The railway cable parameter testing recorder provided in this application can upload test data to a local area network, which facilitates data management of the entire system and thus better serves the railway signaling system.

[0059] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A railway cable parameter detection recorder, characterized in that, include: First test port (1) and second test port (2); The bridge circuit (3) is connected to the first test port (1); Switch the interface (4) to the second test port (2); The oscilloscope circuit (5) is connected to the switching interface (4) and the isolation module (9); The megohmmeter circuit (6) is connected to the switching interface (4) and the oscilloscope circuit (5); The test mode switching circuit (7) is connected to the bridge circuit (3), the oscilloscope circuit (5), the isolation module (9), and the switching interface (4); The human-machine interface (8) is connected to the test mode switching circuit (7) and the switching interface (4).

2. The railway cable parameter detection recorder according to claim 1, characterized in that, The test mode switching circuit (7) includes a control processing module (71), a third relay (72), a fourth relay (73), and a fifth relay (74); the control processing module (71) is connected to the third relay (72), the fourth relay (73), and the fifth relay (74); The third relay (72) is connected to the switching interface (4), the fourth relay (73) is connected to the isolation module (9), and the fifth relay (74) is connected to the bridge circuit (3).

3. The railway cable parameter detection recorder according to claim 1, characterized in that, The switching interface (4) includes a first relay (41) and a second relay (42); The first relay (41) is connected to the oscilloscope circuit (5), and the second relay (42) is connected to the megohmmeter circuit (6).

4. The railway cable parameter detection recorder according to claim 1, characterized in that, The human-machine interface (8) includes a main control board and a display, and the main control board, the display, the test mode switching circuit (7), and the switching interface (4) are all connected.

5. The railway cable parameter detection recorder according to claim 1, characterized in that, The isolation module (9) is a circuit acquisition module that converts voltages within 1000V into linear changes from 0 to 10V.

6. The railway cable parameter detection recorder according to claim 5, characterized in that, The power supply voltage of the isolation module (9) is 12V, and the isolation withstand voltage rating is 2000V.

7. The railway cable parameter detection recorder according to claim 1, characterized in that, Also includes: The mobile terminal (10) is connected to the human-machine interface (8).

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