LED testing device for railway
By designing a portable LED testing device and integrating testing units, the problems of short lifespan of traditional light sources and performance testing of LED signal lights have been solved, achieving efficient and accurate LED testing, reducing maintenance costs, and improving train safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI YUNHAN TECHNOLOGY CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-24
AI Technical Summary
In existing railway signal lights, traditional light sources have short lifespans and are frequently damaged, affecting train safety and maintenance costs. Furthermore, LED signal lights are susceptible to performance degradation in complex environments, and there is a lack of effective testing methods.
Design a portable LED testing device that integrates a testing unit, including a power input terminal, an AC regulated power supply, a voltage regulator, a railway signal lighting unit, and a test lamp holder. It can test the performance of LEDs under different voltage conditions and has multiple voltage adjustment and monitoring functions.
It enables high-precision and convenient testing of LED lights, reduces maintenance costs, improves the safety and efficiency of train operation, and adapts to the testing needs of LED lights of different models and manufacturers.
Smart Images
Figure CN224553455U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of LED testing technology, and more specifically, to an LED testing device for railway use. Background Technology
[0002] In the railway train operation system, signal lights are core equipment ensuring safe train operation, and their service life and reliability are crucial. In the past, incandescent and halogen lamps were commonly used as signal lights in railway operations. However, these traditional light sources have significant drawbacks. Their lifespan is relatively short, and they frequently fail, resulting in a high frequency of signal light replacements. Frequent replacements not only increase maintenance costs but also disrupt the normal operation rhythm of trains, negatively impacting train safety and efficiency. With the advent of the high-speed rail era, train speeds are constantly increasing, and the density of train operations is continuously expanding, placing increasingly stringent performance requirements on signal lights. Against this backdrop, improving signal light lifespan and reducing replacement frequency has become a key path to improving train safety and operational efficiency. At this juncture, new LED light sources have emerged as an ideal replacement for existing incandescent and halogen lamps, and the adoption of LED light sources to replace traditional light sources has become an inevitable trend in the development of railway signal lights.
[0003] LED signal lights possess numerous significant advantages. In terms of lifespan, LED light sources have a lifespan far exceeding that of incandescent and halogen lamps, drastically reducing replacement frequency and maintenance workload. Regarding energy consumption, LED lights are energy-efficient, effectively reducing energy consumption compared to traditional light sources, aligning with the concept of green development. Furthermore, LED signal lights feature high brightness, excellent color rendering, and fast response speed, enabling clearer and more accurate transmission of signal commands to trains, providing a more reliable guarantee for safe train operation. Therefore, LED signal lights have become an essential device for guiding safe train operation and are of great significance in promoting the high-quality development of the railway transportation industry.
[0004] Despite the significant advantages of LED signal lights, their performance is affected by various factors such as ambient temperature, humidity, and electromagnetic interference during actual operation. Furthermore, prolonged high-load operation can lead to problems such as light source attenuation and drive circuit failure. Therefore, establishing a scientific and efficient LED signal light testing system to promptly detect and eliminate potential faults is a crucial step in ensuring the safe and stable operation of railway trains. Utility Model Content
[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a fast and convenient LED testing device for railways. This testing device can test LEDs of different models and manufacturers, and can detect the performance indicators of the LEDs under different voltage conditions in the primary and secondary voltage states of railway signal lighting units. It has high testing accuracy, is easy to operate, has complete functions, and has a high degree of integration.
[0006] The objective of this utility model is achieved through the following technical solution.
[0007] A railway LED testing device includes a housing, within which a testing unit is integrated. The testing unit includes a power input terminal for connecting to AC power, an AC regulated power supply for converting the input AC power into stable AC power, a voltage regulator for adjusting the output voltage of the AC regulated power supply, a railway signal lighting unit for converting the output voltage of the voltage regulator into three voltage levels, and a test lamp holder for mounting LED lights.
[0008] The input side of the AC regulated power supply is connected to the power input terminal, and the output side of the regulated power supply is connected to the input terminal of the railway signal lighting unit via a voltage regulator. The output terminal of the railway signal lighting unit is connected to the main filament pin, auxiliary filament pin, and common pin of the test lamp holder, respectively.
[0009] Furthermore, the outer casing is designed as a portable carrying case.
[0010] Furthermore, the input side of the AC regulated power supply is connected to the power input terminal via a switch button, and the two pins of the output side of the AC regulated power supply are respectively connected to the input pin and the output pin of the voltage regulator.
[0011] Furthermore, the railway signal lighting unit includes a current-type relay and a transformer for generating three voltage levels of 13V, 14V, and 16V. The two pins on the high-voltage side of the transformer are respectively connected to the output pin and adjustment pin of the voltage regulator. The common output terminal on the low-voltage side of the transformer is connected to the common pin of the test lamp holder via switch button No. 4. The three voltage output pins on the low-voltage side of the transformer are respectively connected to the three control pins of the three-position selector switch. The common pin of the three-position selector switch is connected to the input terminal of the current-type relay. The two output terminals of the current-type relay are respectively connected to the main filament pin and auxiliary filament pin of the test lamp holder via switch buttons No. 2 and No. 3.
[0012] Furthermore, a No. 1 AC voltmeter is connected in parallel on the high-voltage side of the transformer, and a No. 1 AC ammeter is connected in series between the high-voltage side of the transformer and the voltage regulator; a No. 2 AC ammeter and a No. 3 AC ammeter are connected in series between the two output terminals of the current-type relay and the main filament pin and the auxiliary filament pin of the test lamp holder, respectively; a No. 2 AC voltmeter is connected in parallel between the main filament pin and the common pin of the test lamp holder, and a No. 3 AC voltmeter is connected in parallel between the auxiliary filament pin and the common pin of the test lamp holder.
[0013] Furthermore, the housing is equipped with a test panel for integrating the test unit. The power input terminal, switch button 1, switch button 2, switch button 3, switch button 4, AC ammeter 1, AC ammeter 2, AC ammeter 3, AC voltmeter 1, AC voltmeter 2, AC voltmeter 3, voltage regulator adjustment knob, three-position selector switch, and test lamp holder of the test unit are fixed to the upper surface of the test panel, and the remaining components are fixed to the lower surface of the test panel.
[0014] Compared with the prior art, the beneficial effects of the technical solution of this utility model are:
[0015] (1) The overall design of the railway LED testing device of this utility model is a plastic portable carrying case structure. In actual testing, it can test LED lights by simply connecting to AC220V power supply. It is lightweight, practical, portable and easy to operate.
[0016] (2) This utility model can test existing light bulbs and new LED lights of different models. Through multiple sets of digital display instruments including AC voltmeters and AC ammeters, it can collect the input voltage and current values of the primary side of the railway signal lighting unit, as well as the current and voltage parameters of different filaments in the LED light to be tested. The collected data has high accuracy and clear display.
[0017] (3) This utility model can adjust the voltage of the primary and secondary sides of the railway signal lighting unit by adjusting the voltage regulator and the three-position switch respectively, and can provide three voltages of 13V, 14V and 16V for the LED lamp under test, so as to facilitate the performance indicators of the LED lamp under test under different voltage states in the primary and secondary modes. Since the power supply voltage of the test lamp holder is provided by the current type relay, the power supply of the auxiliary filament can be automatically cut off when the main filament is working, so as to realize the single filament operation to meet the test requirements of the dual filament light source. It has complete functions and is easy to operate. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the appearance of the LED testing device for railways according to this utility model.
[0019] Figure 2 This is a schematic diagram of the integration of the test panel in this utility model.
[0020] Figure 3 This is a schematic diagram of the circuit principle of the test unit in this utility model.
[0021] Attached reference numerals: 1-outer shell, 101-top cover, 102-box body, 2-test panel;
[0022] DZ - Power input terminal, WY - AC regulated power supply, TY - Voltage regulator DDX, - Railway signal lighting unit, BY - Transformer, JD - Current-type relay, L - Coil, TLH - Test lamp holder;
[0023] A1 - AC ammeter No. 1, A2 - AC ammeter No. 2, A3 - AC ammeter No. 3, V1 - AC voltmeter No. 1, V2 - AC voltmeter No. 2, V3 - AC voltmeter No. 3, K1 - Switch No. 1, K2 - Switch No. 2, K3 - Switch No. 3, K4 - Switch No. 4, K5 - Three-position selector switch, K6 - Normally closed contact of the switch. Detailed Implementation
[0024] The present invention will now be further described with reference to the accompanying drawings.
[0025] like Figure 1 As shown, this utility model of an LED testing device for railway use includes a housing 1, which can be a portable suitcase, such as a plastic suitcase, and consists of a top cover 101 and a body 102. A testing panel 2 is disposed inside the housing 1, and the testing panel 2 integrates testing units. Figure 2 and Figure 3 As shown, the test unit mainly includes a power input terminal DZ, an AC regulated power supply WY, a voltage regulator TY, a railway signal lighting unit DDX, and a test lamp holder TLH.
[0026] The power input terminal DZ is used to connect to 220V AC power. The AC regulated power supply WY is used to convert the 220V AC power connected to the power input terminal DZ into a stable 220V AC power. The voltage regulator TY is used to regulate the output voltage of the AC regulated power supply WY, which can be manually adjusted to the required voltage value. The railway signal lighting unit DDX is used to convert the output voltage of the voltage regulator TY into the required three voltage levels, such as 13V, 14V, and 16V, to provide voltage for the subsequent test lamp holder TLH. The test lamp holder TLH is used to mount the LED lamp to be tested.
[0027] The input side (pins 1 and 2) of the AC regulated power supply WY can be connected to the power input terminal DZ via the first switch button K1. The output side of the regulated power supply WY is connected to the input terminal of the railway signal lighting unit DDX via the voltage regulator TY. The output terminal of the railway signal lighting unit DDX is connected to the main filament pin, auxiliary filament pin, and common pin of the test lamp holder TLH, respectively.
[0028] In the above-mentioned device, preferably, the railway signal lighting unit DDX mainly includes a current-type relay JD and a transformer BY. The transformer BY is used to convert the output voltage of the voltage regulator TY into three voltage levels: 13V, 14V, and 16V. The two pins "I1" and "I2" on the high-voltage side of the transformer BY are respectively connected to the output pin "2" and adjustment pin "3" of the voltage regulator TY, and the input pin "1" and output pin "2" of the voltage regulator TY are respectively connected to the two pins "3" and "4" on the output side of the AC regulated power supply WY. The common output terminal "G" of the low-voltage side of the transformer BY is connected to the common pin "G" of the test lamp holder TLH via switch button K4. The three voltage output pins "13", "14", and "16" of the low-voltage side of the transformer BY are connected to the three control pins "1", "2", and "3" of the three-position selector switch K5, respectively. The common pin "T" of the three-position selector switch K5 is connected to the input terminal of the current-type relay JD. The two output terminals of the current-type relay JD are connected to the main filament pin "Z" and the auxiliary filament pin "F" of the test lamp holder TLH via switches button K2 and K3, respectively. The three-position selector switch K5 is used to select the output voltage of the railway signal lighting unit DDX as 13V, 14V, or 16V to power the test lamp holder TLH. The current-type relay JD mainly consists of a coil L and a normally closed contact K6.
[0029] In the above-mentioned device, preferably, an AC voltmeter V1 is connected in parallel to the high-voltage side of the transformer BY, and an AC ammeter A1 is connected in series between the high-voltage side of the transformer BY and the voltage regulator TY. Specifically, the AC ammeter A1 is connected in series between the high-voltage side pin "I1" of the transformer BY and the adjustment pin "3" of the voltage regulator TY. The AC voltmeter V1 and the AC ammeter A1 are used to measure the voltage and current values input to the high-voltage side of the transformer BY in the railway signal lighting unit DDX, respectively. A second AC ammeter A2 and a third AC ammeter A3 are connected in series between the two output terminals of the current-type relay JD and the main filament pin and the auxiliary filament pin of the test lamp holder TLH, respectively. A second AC voltmeter V2 is connected in parallel between the main filament pin "Z" and the common pin "G" of the test lamp holder TLH, and a third AC voltmeter V3 is connected in parallel between the auxiliary filament pin "F" and the common pin "G" of the test lamp holder TLH.
[0030] In the above-mentioned device, preferably, the power input terminal DZ of the test unit, switch button K1, switch button K2, switch button K3, switch button K4, AC ammeter A1, AC ammeter A2, AC ammeter A3, AC voltmeter V1, AC voltmeter V2, AC voltmeter V3, voltage regulator TY adjustment knob, three-position selector switch K5, and test lamp holder TLH are fixed to the upper surface of the test panel 2, and the remaining components are fixed to the lower surface of the test panel 2.
[0031] In the above-mentioned device, preferably, the test lamp holder TLH can be a double-filament test lamp holder, and the model can be selected according to requirements. The power input terminal DZ and the first switch button K1 can be integrated together, and a three-in-one T-shaped socket can be used. The first AC ammeter A1 and the first AC voltmeter V1 can be integrated together, and a digital display instrument of model PZEM-021 can be used. The second AC ammeter A2 and the third AC ammeter A3 can both be AC ammeters of model YQ5135B. The second AC voltmeter V2 and the third AC voltmeter V3 can both be AC voltmeters of model D85-20. The voltage regulator TY can be of model TDGC2-500W, etc. The three-position changeover switch K5 can be a changeover switch of model LW-26.
[0032] The testing device of this utility model is connected to an AC 220V power supply via the power input terminal DZ. Power is supplied to the AC regulated power supply WY, voltage regulator TY, and railway signal lighting unit DDX via switch button K1. By adjusting the voltage regulator TY, the voltage input to the high-voltage side (primary side) of the transformer BY in the railway signal lighting unit DDX can be changed. After being stepped down by the transformer BY, the secondary voltage is output on the low-voltage side (secondary side), with three levels: 13V, 14V, and 16V. The three-level selector switch K5 selects the output voltage of 13V, 14V, or 16V. The current is then supplied to the LED lamp under test mounted on the test lamp holder TLH via the coil L of the current-type relay JD and the normally closed contact K6. The current and voltage parameters of the LED lamp under test (dual filament) are monitored in real time by AC ammeter A2, AC ammeter A3, AC voltmeter V2, and AC voltmeter V3. By operating switches K2 (number 2), K3 (number 3), and K4 (number 4), the operating status of the LED lamp under test can be adjusted under different operating voltage conditions, such as switching between main and auxiliary filament power-off and stopping the TLH voltage output of the test lamp holder. Specifically, the normally closed contact K6 of the current-type relay JD becomes normally open when the current in the coil L circuit is greater than the relay's pull-in value, and becomes normally closed again when the current in the coil L circuit is less than the relay's release value.
[0033] This invention allows for the adjustment of the primary and secondary voltages of the railway signal lighting unit DDX by regulating the voltage regulator TY and the three-position selector switch K5. This facilitates the measurement of the LED lamp under test under different primary and secondary voltage conditions. Since the power supply voltage of the test lamp holder TLH is provided by the current-type relay JD, the power supply to the auxiliary filament can be automatically cut off when the main filament is working, thus achieving single-filament operation and meeting the testing requirements of dual-filament light sources.
[0034] Although the functions and working processes of this utility model have been described above in conjunction with the accompanying drawings, this utility model is not limited to the specific functions and working processes described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this utility model without departing from the spirit and scope of the claims, and all of these are within the protection scope of this utility model.
Claims
1. A railway LED testing device, comprising a housing, wherein a testing unit is integrated within the housing (1), characterized in that, The test unit includes a power input terminal (DZ) for connecting AC power, an AC regulated power supply (WY) for converting the input AC power into stable AC power, a voltage regulator (TY) for adjusting the output voltage of the AC regulated power supply (WY), a railway signal lighting unit (DDX) for converting the output voltage of the voltage regulator (TY) into three voltage levels, and a test lamp holder (TLH) for mounting LED lights. The input side of the AC regulated power supply (WY) is connected to the power input terminal (DZ). The output side of the regulated power supply (WY) is connected to the input terminal of the railway signal lighting unit (DDX) via a voltage regulator (TY). The output terminal of the railway signal lighting unit (DDX) is connected to the main filament pin, auxiliary filament pin, and common pin of the test lamp holder (TLH).
2. The railway LED testing device according to claim 1, characterized in that, The outer casing (1) is a portable suitcase.
3. The railway LED testing device according to claim 1, characterized in that, The input side of the AC regulated power supply (WY) is connected to the power input terminal (DZ) via a switch button (K1), and the two output pins of the AC regulated power supply (WY) are respectively connected to the input pin and output pin of the voltage regulator (TY).
4. The railway LED testing device according to claim 1, characterized in that, The railway signal lighting unit (DDX) includes a current-type relay (JD) and a transformer (BY) for generating three voltage levels of 13V, 14V, and 16V. The two pins on the high-voltage side of the transformer (BY) are connected to the output pin and adjustment pin of the voltage regulator (TY), respectively. The common output terminal of the low-voltage side of the transformer (BY) is connected to the common pin of the test lamp holder (TLH) via switch button No. 4 (K4). The three voltage output pins on the low-voltage side of the transformer (BY) are connected to the three control pins of the three-position selector switch (K5), respectively. The common pin of the three-position selector switch (K5) is connected to the input terminal of the current-type relay (JD). The two output terminals of the current-type relay (JD) are connected to the main filament pin and auxiliary filament pin of the test lamp holder (TLH) via switch buttons No. 2 (K2) and No. 3 (K3), respectively.
5. The railway LED testing device according to claim 4, characterized in that, A first AC voltmeter (V1) is connected in parallel to the high-voltage side of the transformer (BY), and a first AC ammeter (A1) is connected in series between the high-voltage side of the transformer (BY) and the voltage regulator (TY). A second AC ammeter (A2) and a third AC ammeter (A3) are connected in series between the two output terminals of the current-type relay (JD) and the main filament pin and the auxiliary filament pin of the test lamp holder (TLH), respectively. A second AC voltmeter (V2) is connected in parallel between the main filament pin and the common pin of the test lamp holder (TLH), and a third AC voltmeter (V3) is connected in parallel between the auxiliary filament pin and the common pin of the test lamp holder (TLH).
6. The railway LED testing device according to claim 1, 2, 3, 4, or 5, characterized in that, The housing (1) is provided with a test panel (2) for integrating the test unit. The power input terminal (DZ), switch button 1 (K1), switch button 2 (K2), switch button 3 (K3), switch button 4 (K4), AC ammeter 1 (A1), AC ammeter 2 (A2), AC ammeter 3 (A3), AC voltmeter 1 (V1), AC voltmeter 2 (V2), AC voltmeter 3 (V3), voltage regulator (TY) adjustment knob, three-position switch (K5), and test lamp holder (TLH) of the test unit are fixed to the upper surface of the test panel (2), and the remaining components are fixed to the lower surface of the test panel (2).