Railway signal LED light-emitting disc testing device

Abstract

The utility model discloses a railway signal LED light-emitting disc testing device, belongs to the technical field of railway signal testing, and solves the problems that a railway signal light-emitting disc is difficult to test on site and the testing precision is limited. Comprising an HMI, a PLC, a 12V test module, a 220V test module, an AC current acquisition module, an AC voltage acquisition module, a DC current acquisition module, a DC voltage acquisition module, a power supply conversion module T3 and a power supply module. The 12V test module comprises a switch K1, a power supply conversion module T1 and a 12V test port; the switch K1, the power supply conversion module T1 and the 12V test port are connected in series and then are connected with the power supply module, and the 12V test port is connected with the 12V LED light-emitting disc; according to the utility model, the test port of the test device can be selected according to the voltage type of the light-emitting disc circuit, the light-emitting disc test result can be directly obtained through the PLC according to the collected current and voltage data, and the evaluation result is more comprehensive compared with the field test evaluation result.

Description

Technical Field

[0001] This utility model belongs to the field of railway signal testing technology and relates to a railway signal LED light-emitting disk testing device. Background Technology

[0002] Railway signal LED illuminated panels are lighting devices used in railway signaling systems. They feature the following characteristics: low power consumption, saving up to 85% of energy compared to traditional light sources (such as incandescent and halogen lamps); long lifespan, with LEDs lasting up to 50,000 hours, 25 times longer than incandescent lamps, significantly reducing maintenance costs for railway signal lights; stable signal color, as the LED light source itself emits the monochromatic light required for the signal, eliminating the need for colored lenses and preventing defects caused by lens fading. Furthermore, railway signal LED illuminated panels are easy to assemble, disassemble, and maintain.

[0003] Currently, LED light-emitting panels can be tested in two ways: one is through professional testing institutions that perform specialized tests on structural strength, luminous intensity, and scattering data; however, such testing is time-consuming and labor-intensive, and cannot be applied during equipment use, affecting work efficiency. The other method is to use a multimeter to measure the real-time operating current during on-site application to determine performance quality; however, the accuracy and variety of test data obtained by multimeter measurements are limited, and it is difficult to accurately diagnose the specific cause of the problem based solely on basic multimeter measurements, making it impossible to directly determine the performance of the LED light-emitting panel. Utility Model Content

[0004] The technical solution of this utility model is used to solve the problems of difficulty in on-site testing of railway signal light disks and limited testing accuracy.

[0005] This utility model solves the above-mentioned technical problems through the following technical solution:

[0006] A railway signal LED light-emitting panel testing device includes an HMI, a PLC, a 12V testing module, a 220V testing module, an AC current acquisition module, an AC voltage acquisition module, a DC current acquisition module, a DC voltage acquisition module, a power conversion module T2, a power conversion module T3, and a power module.

[0007] The 12V test module includes a switch K1, a power conversion module T1, and a 12V test port; the switch K1, the power conversion module T1, and the 12V test port are connected in series and then connected to the power module; the 12V test port is connected to a 12V LED light-emitting panel.

[0008] The 220V test module includes a switch K2 and a 220V test port; the switch K2 and the 220V test port are connected in series and then connected in parallel with the 12V test module; the 220V test port is connected to a 220V LED light-emitting panel.

[0009] The power conversion module T2, the AC current acquisition module, and the AC voltage acquisition module are connected in series and then connected to the power module.

[0010] The power conversion module T3, DC current acquisition module, DC voltage acquisition module, PLC, and HMI are connected in series and then connected to the power module.

[0011] Furthermore, the AC current acquisition module is specifically an AC current transformer CT1, the AC voltage acquisition module is specifically an AC voltage transformer VT1, the DC current acquisition module is specifically a DC current transformer CT2, and the DC voltage acquisition module is specifically a DC voltage transformer VT2.

[0012] Furthermore, the power module includes a 220V AC power supply, an air switch QF, and a main switch K; the main switch K is located on the live wire, and the two ends of the air switch QF are respectively connected to the live wire and the neutral wire of the 220V AC power supply.

[0013] Furthermore, one end of the switch K1 is connected to the high-voltage side of the power conversion module T1, the low-voltage side of the power conversion module T1 is connected to one end of the 12V test port, and the other end of the 12V test port is connected to the neutral wire of the 220V AC power supply.

[0014] Furthermore, the high-voltage side of the power conversion module T1 is connected to a 220V AC voltage, and the low-voltage side of the power conversion module T1 outputs a 12V DC voltage.

[0015] Furthermore, the high-voltage side of the power conversion module T2 is connected to the live wire of the 220V AC power supply, the low-voltage side of the power conversion module T2 outputs a 24V DC voltage and is connected to one end of the AC current transformer CT1, and the non-series terminal of the AC voltage transformer VT1 is connected to the neutral wire of the 220V AC power supply.

[0016] Furthermore, the high-voltage side of the power conversion module T3 is connected to the live wire of the 220V AC power supply, the low-voltage side of the power conversion module T3 is connected to one end of the DC current transformer CT2, and the non-series terminal of the HMI is connected to the neutral wire of the 220V AC power supply.

[0017] Furthermore, the high-voltage side of the power conversion module T3 is connected to a 220V AC voltage, and the low-voltage side of the power conversion module T3 outputs a 24V DC voltage.

[0018] Furthermore, the HMI is connected to the PLC via communication. The first analog input terminal of the PLC receives the DC current signal from the DC current transformer CT2, the second analog input terminal of the PLC receives the DC voltage signal from the DC voltage transformer VT2, the third analog input terminal of the PLC receives the AC current signal from the AC current transformer CT1, and the fourth analog input terminal of the PLC receives the AC voltage signal from the AC voltage transformer VT1.

[0019] Furthermore, the power conversion modules T1, T2, and T3 are all AC / DC switching power supply devices.

[0020] The advantages of this utility model are:

[0021] (1) This utility model can select the test port of the test device according to the voltage type (12V or 220V) of the light-emitting disk circuit. Based on the collected current and voltage data, the test results of the light-emitting disk (including the number of lights off, pass rate and real-time power) can be directly obtained through the PLC, which is more comprehensive than the on-site test evaluation results. This utility model can complete the test quickly on-site without connecting to the railway signal interlocking system, which effectively improves the convenience of on-site testing. At the same time, the test data can be directly obtained and saved by the PLC, which significantly shortens the detection time, effectively screens out unqualified light-emitting disks, and reduces the maintenance cost and train failure risk after the disk is put on the road.

[0022] (2) The PLC and HMI are set on the same circuit as the DC current acquisition module and the DC voltage acquisition module. The DC voltage and DC current signals can be directly transmitted to the analog input terminal of the PLC, which improves the stability of data transmission. The circuit uses the power conversion module T3 to step down and rectify the 220V AC voltage to 24V DC voltage, which can simultaneously realize the acquisition of DC voltage and current signals, and also provide power supply for the PLC and HMI. This avoids redundancy in the circuit design of the test device, unifies the 24V power supply, and reduces voltage mismatch problems. Attached Figure Description

[0023] Figure 1 This is a frame diagram of a railway signal LED light-emitting disk testing device according to Embodiment 1 of this utility model;

[0024] Figure 2 This is a circuit diagram of a railway signal LED light-emitting disk testing device according to Embodiment 1 of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] Example 1

[0028] like Figures 1-2 Specifically, a railway signal LED light-emitting panel testing device is disclosed, including a 220V AC power supply, an air switch QF, a main switch K, a switch K1, a switch K2, a power conversion module T1, a power conversion module T2, a power conversion module T3, a 12V test port, a 220V test port, an AC current transformer CT1, an AC voltage transformer VT1, a DC current transformer CT2, a DC voltage transformer VT2, a PLC, and an HMI.

[0029] The 220V AC power supply, air switch QF, and main switch K form a power module used to provide power to the various units that make up the testing device. Specifically, the main switch K is located on the live wire, and the two ends of the air switch QF are connected to the live wire and the neutral wire of the 220V AC power supply, respectively.

[0030] The switch K1, power conversion module T1, and 12V test port constitute a 12V test module. Specifically, the switch K1, power conversion module T1, and 12V test port are connected in series and then connected to the power module. One end of the switch K1 is connected to the high-voltage side of the power conversion module T1, which is connected to a 220V AC voltage. The low-voltage side of the power conversion module T1 outputs a 12V DC voltage, which is connected to one end of the 12V test port. The other end of the 12V test port is connected to the neutral wire of the 220V AC power supply. The 12V test port is connected to a 12V LED light-emitting panel.

[0031] The switch K2 and the 220V test port form a 220V test module; specifically, the switch K2 and the 220V test port are connected in series and then connected in parallel with the 12V test module, and the 220V test port is connected to a 220V LED light-emitting panel.

[0032] In this embodiment, the 12V test module and the 220V test module constitute a test control unit, which is used to select the corresponding test module according to the model of the LED light-emitting disk to be tested. For example, the 12V test port of the 12V test module is connected to the LED light-emitting disk circuit with a driving power supply of 12V to test the 12V LED light-emitting disk circuit. It is also used to execute the test commands of the PLC.

[0033] In this embodiment, the AC current acquisition module, AC voltage acquisition module, DC current acquisition module, and DC voltage acquisition module constitute a data acquisition unit. Specifically, the AC current acquisition module is an AC current transformer CT1, the AC voltage acquisition module is an AC voltage transformer VT1, the DC current acquisition module is a DC current transformer CT2, and the DC voltage acquisition module is a DC voltage transformer VT2. These modules are used to acquire the current and voltage signals of the LED light-emitting disk circuit under test. Depending on the driving voltage of the LED light-emitting disk, the types of voltage and current signals acquired are also different, and they are converted into analog data that can be read by the PLC.

[0034] Specifically, the power conversion module T2, AC current transformer CT1, and AC voltage transformer VT1 are connected in series and then connected to the power module. The high-voltage side of the power conversion module T2 is connected to the live wire of the 220V AC power supply. The low-voltage side of the power conversion module T2 outputs a 24V DC voltage and is connected to one end of the AC current transformer CT1. The non-series terminal of the AC voltage transformer VT1 is connected to the neutral wire of the 220V AC power supply.

[0035] Furthermore, the power conversion module T3, DC current acquisition module, DC voltage acquisition module, PLC, and HMI are connected in series and then connected to the power module; the high-voltage side of the power conversion module T3 is connected to the live wire of the 220V AC power supply, the low-voltage side of the power conversion module T3 outputs 24V DC voltage and is connected to one end of the DC current transformer CT2, and the non-series terminal of the HMI is connected to the neutral wire of the 220V AC power supply.

[0036] In this embodiment, the PLC serves as the intelligent computing unit, and the HMI (Human Machine Interface) serves as the human-machine interaction unit. The HMI communicates with the PLC via a network cable for data exchange. The PLC processes the operation commands sent by the operator through the HMI and issues specific execution commands to the test control unit. Simultaneously, the PLC, HMI, DC current acquisition module, and DC voltage acquisition module are located on the same circuit. DC voltage and current signals can be directly transmitted to the analog input terminal of the PLC, improving data transmission stability. The circuit uses power conversion module T3 to step down and rectify the 220V AC voltage to 24V DC voltage, enabling simultaneous acquisition of DC voltage and current signals. It also provides power to the PLC and HMI, avoiding redundancy in the test device circuit design, ensuring a unified 24V power supply, and reducing voltage mismatch issues.

[0037] Furthermore, the first analog input terminal of the PLC receives the DC current signal from the DC current transformer CT2, the second analog input terminal of the PLC receives the DC voltage signal from the DC voltage transformer VT2, the third analog input terminal of the PLC receives the AC current signal from the AC current transformer CT1, and the fourth analog input terminal of the PLC receives the AC voltage signal from the AC voltage transformer VT1.

[0038] Furthermore, the range of the AC current signal and the DC current signal is 4-20mA, and the range of the AC voltage signal and the DC voltage signal is 0-10V.

[0039] Furthermore, the power conversion modules T1, T2, and T3 are all AC / DC switching power supply devices. The model of power conversion module T1 is Mean Well DR-30-12, and the models of power conversion modules T2 and T3 are both Mean Well DR-30-24.

[0040] Working principle:

[0041] An LED light-emitting disk is formed by connecting several LED beads in series, parallel or other cascaded ways to form a light-emitting disk circuit. According to the test circuit type (12V or 220V) of the light-emitting disk circuit, the test port of the light-emitting disk circuit is connected to the test device, and the test device is used to test and count the on and off status of the LED beads in the light-emitting disk circuit.

[0042] Before using the testing device, turn on the main switch K and the air switch QF. On the Human-Machine Interface (HMI), select the model of the LED display to be tested. When the LED circuit is 12V, turn on the test power knob switch K1; when the LED circuit is 220V, turn on the test power knob switch K2. Click "Test" on the HMI to connect the corresponding 12V or 220V LED circuit. The circuit containing the power conversion module T3 steps down and rectifies the 220V AC voltage to 24V DC voltage, enabling simultaneous acquisition of DC voltage and current signals, and providing power to the PLC and HMI. Simultaneously, the circuit containing the power conversion module T2 also provides 24V DC power to the AC voltage transformer VT1 and the AC current transformer CT1.

[0043] If the 12V test port is connected, the DC current and DC voltage data of the illuminated LED in the LED circuit are collected through DC voltage transformer VT2 and DC current transformer CT2. The collected data is transmitted to the PLC. The PLC receives analog current signals of 4-20mA or analog voltage signals of 0-10V. Based on the current and voltage data, the real-time power of the LED circuit is calculated. Dividing this power by the rated power of a single LED, the number of LEDs lit in the current LED circuit can be determined, and thus the number of LEDs turned off can be determined. The pass rate is the number of lit LEDs divided by the total number of LEDs. Clicking "save" on the HMI screen allows the test data to be stored in the PLC and saved to a USB flash drive. The test data can also be printed and saved.

[0044] This utility model tested nearly 300 light-emitting discs, returned 10 that were unqualified (each costing approximately 2,700 yuan), and replaced nearly 300 light-emitting discs during the reuse construction, generating direct economic benefits of nearly 400,000 yuan and bringing significant economic and social benefits.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A testing device for railway signal LED illuminated panels, characterized in that, Includes HMI, PLC, 12V test module, 220V test module, AC current acquisition module, AC voltage acquisition module, DC current acquisition module, DC voltage acquisition module, power conversion module T2, power conversion module T3, and power module; The 12V test module includes a switch K1, a power conversion module T1, and a 12V test port; the switch K1, the power conversion module T1, and the 12V test port are connected in series and then connected to the power module; the 12V test port is connected to a 12V LED light-emitting panel. The 220V test module includes a switch K2 and a 220V test port; the switch K2 and the 220V test port are connected in series and then connected in parallel with the 12V test module; the 220V test port is connected to a 220V LED light-emitting panel. The power conversion module T2, the AC current acquisition module, and the AC voltage acquisition module are connected in series and then connected to the power module. The power conversion module T3, DC current acquisition module, DC voltage acquisition module, PLC, and HMI are connected in series and then connected to the power module.

2. The railway signal LED light-emitting disk testing device according to claim 1, characterized in that, The AC current acquisition module is specifically an AC current transformer CT1, the AC voltage acquisition module is specifically an AC voltage transformer VT1, the DC current acquisition module is specifically a DC current transformer CT2, and the DC voltage acquisition module is specifically a DC voltage transformer VT2.

3. The railway signal LED light-emitting disk testing device according to claim 2, characterized in that, The power module includes a 220V AC power supply, an air switch QF, and a main switch K; the main switch K is located on the live wire, and the two ends of the air switch QF are respectively connected to the live wire and the neutral wire of the 220V AC power supply.

4. The railway signal LED light-emitting disk testing device according to claim 3, characterized in that, One end of the switch K1 is connected to the high-voltage side of the power conversion module T1, the low-voltage side of the power conversion module T1 is connected to one end of the 12V test port, and the other end of the 12V test port is connected to the neutral wire of the 220V AC power supply.

5. A railway signal LED light-emitting disk testing device according to claim 4, characterized in that, The power conversion module T1 is connected to a 220V AC voltage on its high-voltage side and outputs a 12V DC voltage on its low-voltage side.

6. The railway signal LED light-emitting disk testing device according to claim 3, characterized in that, The high-voltage side of the power conversion module T2 is connected to the live wire of the 220V AC power supply. The low-voltage side of the power conversion module T2 outputs a 24V DC voltage and is connected to one end of the AC current transformer CT1. The non-series end of the AC voltage transformer VT1 is connected to the neutral wire of the 220V AC power supply.

7. A railway signal LED light-emitting disk testing device according to claim 3, characterized in that, The high-voltage side of the power conversion module T3 is connected to the live wire of the 220V AC power supply, the low-voltage side of the power conversion module T3 is connected to one end of the DC current transformer CT2, and the non-series terminal of the HMI is connected to the neutral wire of the 220V AC power supply.

8. A railway signal LED light-emitting disk testing device according to claim 7, characterized in that, The high-voltage side of the power conversion module T3 is connected to a 220V AC voltage, and the low-voltage side of the power conversion module T3 outputs a 24V DC voltage.

9. A railway signal LED light-emitting disk testing device according to claim 3, characterized in that, The HMI is connected to the PLC via communication. The first analog input terminal of the PLC receives the DC current signal from the DC current transformer CT2, the second analog input terminal of the PLC receives the DC voltage signal from the DC voltage transformer VT2, the third analog input terminal of the PLC receives the AC current signal from the AC current transformer CT1, and the fourth analog input terminal of the PLC receives the AC voltage signal from the AC voltage transformer VT1.

10. A railway signal LED light-emitting disk testing device according to claim 1, characterized in that, The power conversion modules T1, T2, and T3 are all AC / DC switching power supply devices.

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