Railway LED signal light system and railway LED signal machine

Abstract

The present invention discloses a railway LED signal light system and an LED signal machine. The system comprises: a filament detection module, a flash control module and an LED signal light; the filament detection module is connected to the LED signal light through the flash control module; the flash control module is used to switch different control states under a frequency control instruction; the LED signal light is used to be in a constant light state when the flash control module is in a first control state; and is also used to be in a dim light state when the flash control module is in a second control state; the filament detection module is used to detect the filament state of the LED signal light when the LED signal light is in a constant light state and when the LED signal light is in an adjustable dim light state. This scheme simultaneously realizes the one-on-one flash function of the LED signal light and the normal detection of the filament state of the LED signal light by the filament detection module when the LED signal light is in a one-on-one flash state.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of railway technology, and in particular to a railway LED signal light system and a railway LED signal machine. Background Art

[0002] Signal display is an important device for directing the movement of vehicles during railway transportation. According to the current railway signal design specifications, when outdoor signal lights up the flashing light, it should alternate between bright and dark. Figure 1 It is a structural diagram of the relay control circuit of the prior art; Figure 1 As shown, the original relay control circuit is realized by adjusting the voltage across the bulb U in the bulb-type light-emitting disk through the parallel resistor R on the flash relay K; when the flash relay K falls, the voltage across the bulb U is the power supply voltage, and the bulb U is in a normally bright state; when the flash relay K is attracted, because the resistor R has a voltage dividing effect, the secondary side voltage of the transformer T is reduced, so that the bulb U is converted from a normally bright state to a dark state, and a light-dark change occurs; and the filament relay Q connected in series in the loop is used to monitor the broken filament state of the outdoor bulb. Since the filament relay Q is still connected in series in the loop when the bulb changes in brightness, current always passes through its two ends, and it can still work normally, and can reflect the state of the outdoor LED light-emitting disk when the bulb changes in brightness.

[0003] In recent years, LED light sources have gradually replaced traditional bulb-type light-emitting disks with their high brightness and long life. When LED light-emitting disks are used as light sources outdoors, because the LED light-emitting disks have a threshold voltage, when the voltage across the light-emitting disk is lower than the threshold voltage, they cannot emit light. Therefore, flashing cannot be achieved by adjusting the voltage across the LED light-emitting disk. Figure 2 This is a schematic diagram of the structure of a railway LED signal light system in the prior art; Figure 2 Flashing is achieved in the manner shown. The principle is that when the flash relay K is opened and closed at a certain frequency, the LED light disc displays normal brightness when the flash relay K falls. At the same time, since the filament relay Q is still connected in series in the loop, current always flows through its two ends, and it can still work normally, which can reflect the state of the outdoor LED light disc; and when the flash relay is sucked up by the LED light disc, the parallel resistor R will short-circuit the LED light disc; so when the flash relay K is opened and closed at a certain frequency, the LED light disc will change from on to off, and its flashing mode does not completely meet the "on and off" specified in the technical specifications, and when the LED light disc is in the off state, the LED light disc is short-circuited, the filament relay is not connected in series with the LED light disc, and the state of the outdoor LED light disc cannot be reflected. Summary of the invention

[0004] The invention provides a railway LED signal light system and a railway LED signal machine, so as to simultaneously realize the bright-dark flashing function of the LED signal light and the normal detection of the filament state of the filament detection module in the bright-dark flashing state of the LED signal light.

[0005] To achieve the above objectives, in a first aspect, an embodiment of the present invention provides a railway LED signal light circuit, the circuit comprising: a filament detection module, a flash control module and an LED signal light; the filament detection module is connected to the LED signal light through the flash control module;

[0006] The flash control module is used to switch different control states under the frequency control instruction;

[0007] The LED signal light is used to be in a constant light state when the flash control module is in a first control state; and is also used to be in a dimming state when the flash control module is in a second control state;

[0008] The filament detection module is used to detect the filament state of the LED signal light when the LED signal light is in a constant light state and when the LED signal light is in a dimmable light state.

[0009] Optionally, the flash control module includes a flash relay and a first PWM dimming unit: the flash relay includes a first contact control unit and a second contact control unit;

[0010] The first end of the filament detection module is electrically connected to the first input end of the power supply; the second end of the filament detection module is connected to the input end of the first contact control unit; the first output end of the first contact control unit is connected to the LED signal lamp; the second output end of the first contact control unit is connected to the first output end of the second contact control unit through the first PWM dimming unit; the second output end of the second contact control unit is connected to the LED signal lamp; the input end of the second contact control unit is electrically connected to the second input end of the power supply; the first output end of the first PWM dimming unit is electrically connected to the first output end of the first contact control unit; the second output end of the first PWM dimming unit is electrically connected to the second output end of the second contact control unit;

[0011] The flasher relay is used to be in a first state and a second state under a frequency control instruction; wherein the first state is that the first contact control unit and the second contact control unit are both in a closed control state; the second state is that the first contact control unit and the second contact control unit are both in an open control state;

[0012] The LED signal light is used to be in a constantly on state when the flash relay is in a first state;

[0013] The first PWM dimming unit is used to adjust the duty cycle to adjust the LED signal light to a dimming state when the flash relay is in the second state;

[0014] Wherein, the operating frequency of the first PWM dimming unit is greater than the flashing frequency of the flash relay by a preset multiple; wherein the preset multiple n satisfies 99≤n≤100.

[0015] Optionally, the flash control module includes a solid-state relay and a first PWM dimming unit: the solid-state relay includes a normally closed contact control unit and a normally open contact control unit;

[0016] The first end of the filament detection module is electrically connected to the first input end of the power supply; the second end of the filament detection module is electrically connected to the input end of the normally closed contact control unit and the input end of the normally open contact control unit; the output end of the normally closed contact control unit is connected to the LED signal light; the output end of the normally open contact control unit is connected to the LED signal light through the first PWM dimming unit;

[0017] The solid-state relay is used to be in a third state and a fourth state under a frequency control instruction; wherein the third state is that the normally closed contact control unit is in a closed state and the normally open contact control unit is in an open state; the fourth state is that the normally closed contact control unit is in an open state and the normally open contact control unit is in a closed state;

[0018] The LED signal light is used to be in a constantly lit state when the solid-state relay is in the third state;

[0019] The first PWM dimming unit is used to adjust the duty cycle to adjust the LED signal light to a dimming state when the solid-state relay is in the fourth state;

[0020] Wherein, the operating frequency of the first PWM dimming unit is greater than a preset multiple of the flashing frequency of the solid-state relay; wherein, the preset multiple n satisfies 99≤n≤100.

[0021] Optionally, the flash control module further includes: a second PWM dimming unit;

[0022] The first output end of the normally closed contact control unit is connected to the LED signal lamp through the second PWM dimming unit.

[0023] Optionally, the flashing frequency of the first PWM dimming unit is equal to the operating frequency of the second PWM dimming unit.

[0024] Optionally, the flashing frequency of the first PWM dimming unit is not equal to the operating frequency of the second PWM dimming unit.

[0025] Optionally, the filament detection module includes a filament relay.

[0026] Optionally, the operating current I range of the filament relay satisfies: 40mA≤I≤100mA.

[0027] Optionally, the LED signal light includes a lighting power supply control unit and an LED light-emitting disk; the LED light-emitting disk includes a plurality of LEDs connected in series;

[0028] The lighting power supply control unit is connected in parallel with the LED light emitting disk.

[0029] In a second aspect, an embodiment of the present invention further provides a railway LED signal machine, which includes the railway LED signal light system described in the first aspect.

[0030] In the embodiment of the present invention, the filament detection module is connected to the LED signal light through the flash control module; the flash control module switches to different control states under the frequency control instruction; the LED signal light is in a constant light state when the flash control module is in a first control state; and is in a dim light state when the flash control module is in a second control state; and the filament detection module can detect the filament state of the LED signal light when the LED signal light is in a constant light state and when the LED signal light is in a dim light state, thereby realizing the normal detection of the filament state of the LED signal light based on the on-dark flashing function of the LED light.

[0031] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a structural schematic diagram of a relay control circuit in the prior art;

[0034] Figure 2 It is a structural schematic diagram of a railway LED signal light system in the prior art;

[0035] Figure 3It is a structural schematic diagram of a railway LED signal light system provided by an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of the specific structure of a railway LED signal light system provided by an embodiment of the present invention;

[0037] Figure 5 It is a specific structural schematic diagram of another railway LED signal light system provided by an embodiment of the present invention;

[0038] Figure 6 It is a specific structural schematic diagram of another railway LED signal light system provided by an embodiment of the present invention;

[0039] Figure 7 It is a specific structural schematic diagram of another railway LED signal light system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the present invention, the technical solution in the present invention will be described clearly and completely below in conjunction with the drawings in the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of this protection.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] Figure 3 Schematic diagram of a railway LED signal light system provided by an embodiment of the present invention. Figure 3As shown, the system includes: a filament detection module 10, a flash control module 20 and an LED signal light 30; the filament detection module 10 is connected to the LED signal light 30 through the flash control module 20; the flash control module 20 is used to switch different control states under a frequency control instruction; the LED signal light 30 is used to be in a constant light state when the flash control module 20 is in a first control state; and is also used to be in an adjustable dimming state when the flash control module 20 is in a second control state; the filament detection module 10 is used to detect the filament state of the LED signal light 30 when the LED signal light 30 is in a constant light state and when the LED signal light 30 is in an adjustable dimming state.

[0043] Among them, the frequency control instruction is a certain flash frequency set according to user needs, such as 50Hz, 60Hz; the flash control module 20 switches different control states under the frequency control instruction; the different control states include a first control state and a second control state; the first control state is a state in which the LED signal light 30 is in a constant light state; that is, in the first control state, the power supply voltage of the LED signal light 30 is the full power voltage of the power supply; the second control state is to make the LED signal light 30 in a dim light state; at the same time, the dim light state of the LED signal light 30 is adjustable; that is, in the second control state, the power supply voltage of the LED signal light 30 is less than the full power voltage of the power supply, and the power supply voltage of the LED signal light 30 is adjustable;

[0044] When the flash control module 20 is working, since the filament detection module 10 is always connected in series in the loop formed by the filament detection module 10 and the LED signal light 30, the filament detection module 10 can detect the filament state of the LED signal light 30 when the LED signal light 30 is in a constant light state and when the LED signal light 30 is in a dimming light state; that is, when the LED signal light 30 is working in a constant light state, the filament detection module 10 detects normally when the filament is broken and when the filament is normal; similarly, when the LED signal light 30 is working normally during flashing, the filament detection module 10 detects normally when the filament is broken and when the filament is normal. It should be noted that the broken filament state of the LED signal light 30 means that a large number of LEDs in the LED signal light 30 (such as the number of LEDs exceeding 50%±5%) are in a broken state; the normal filament state of the LED signal light 30 means that a large number of LEDs in the LED signal light 30 are not broken (that is, the number of broken LEDs does not exceed 50%±5%).

[0045] In the embodiment of the present invention, the filament detection module 10 is connected to the LED signal light 30 through the flash control module 20; the flash control module 20 switches to different control states under the frequency control instruction; the LED signal light 30 is in a constant light state when the flash control module 20 is in a first control state; and is in an adjustable dimming state when the flash control module 20 is in a second control state; and the filament detection module 10 can detect the filament state of the LED signal light 30 when the LED signal light 30 is in a constant light state and in an adjustable dimming state, thereby realizing the bright and dimming flashing function of the LED signal light and the normal detection of the filament state of the filament detection module in the bright and dimming flashing state of the LED signal light, thereby avoiding the situation that the filament detection module 10 cannot detect the filament state of the LED signal light because the LED signal light is in a dimming state.

[0046] Optionally, based on the above embodiment, the flash control module 20 is further refined. Figure 4 Schematic diagram of the specific structure of a railway LED signal light system provided by an embodiment of the present invention; Figure 4 As shown, in some embodiments, the flash control module 20 includes a flash relay 21 and a first PWM dimming unit 22: the flash relay 21 includes a first contact control unit 211 and a second contact control unit 212;

[0047] The first end of the filament detection module 10 is electrically connected to the first input end of the power supply VCC; the second end of the filament detection module 10 is connected to the input end 1 of the first contact control unit 211; the first output end 2 of the first contact control unit 211 is connected to the LED signal light unit 30; the second output end 3 of the first contact control unit 211 is connected to the first output end 5 of the second contact control unit 212 through the first PWM dimming unit 22; the second output end 6 of the second contact control unit 212 is connected to the LED signal light unit 30; the input end 4 of the second contact control unit is electrically connected to the second input end of the power supply VCC; the first output end of the first PWM dimming unit 22 is electrically connected to the first output end 2 of the first contact control unit 211; the second output end of the first PWM dimming unit 22 is electrically connected to the second output end 6 of the second contact control unit 212;

[0048] The flash relay 21 is used to be in a first state and a second state under the frequency control instruction; wherein the first state is that the first contact control unit 211 and the second contact control unit 212 are both in a closed control state; the second state is that the first contact control unit 211 and the second contact control unit 212 are both in an open control state;

[0049] The LED signal lamp 30 is used to be in a constant light state when the flash relay 21 is in the first state;

[0050] The first PWM dimming unit 22 is used to adjust the duty cycle when the flash relay 21 is in the second state to adjust the LED signal light 30 to a dimming state. The operating frequency of the first PWM dimming unit 22 is greater than the operating frequency of the flash relay 21 by a preset multiple; wherein the preset multiple n satisfies 99≤n≤100.

[0051] Specifically, under the frequency control instruction, when the flash relay 21 falls and is in the first state, the first contact control unit 211 and the second contact control unit 212 are both in the closed control state, and the first input end of the power supply directly flows back to the second input end of the power supply through the input end 1 of the first contact control unit 211, the first output end 2 of the first contact control unit 211, the LED signal light 30, the second output end 6 of the second contact control unit 212 and the input end 4 of the second contact control unit 212, and the LED signal light 30 displays a normal brightness light; when the flash relay 21 is attracted and is in the second state, the first contact control unit 211 and the second contact control unit 212 are both in the open control state, and the input end of the power supply passes through the input end 1 of the first contact control unit 211, the second output end 3 of the first contact control unit 211, the LED signal light 30, the second output end 6 of the second contact control unit 212 and the input end 4 of the second contact control unit 212. A PWM dimming unit 22, a first output terminal 5 of a second contact control unit 212 and an input terminal 4 of the second contact control unit 212 then flow back to the second input terminal of the power supply. Since the first PWM dimming unit 22 in the circuit can adjust the height on and off and adjust its duty cycle, the output voltage of the power supply can be changed. Thus, the output voltage output to the LED signal lamp 30 is changed, so that the brightness of the LED signal lamp 30 can be adjusted to be reduced, thereby realizing the bright and dim flashing function of the LED signal lamp at the same time. At the same time, since the filament detection module 10 is always connected in series with the LED signal lamp 30 when the LED signal lamp 30 is in the bright and dim flashing function, the filament detection module 10 can detect the filament state of the LED lamp in the bright and dim flashing state, thereby avoiding the filament detection module being unable to detect the filament state of the LED signal lamp due to the LED signal lamp being in the dim state.

[0052] It should also be noted that the operating frequency of the first PWM dimming unit 22 is greater than the flashing frequency of the flash relay 21 at a preset multiple, wherein the preset multiple n satisfies 99≤n≤100; in this way, on the one hand, when the LED signal light 30 is in a dimming state, visual persistence can be fully utilized so that the human eye does not feel the flickering of the light source; at the same time, there is no situation where the flash relay 21 and the first PWM dimming unit 22 are in a disconnected state at the same time, so that the flashing function cannot be realized; illustratively, the operating frequency of the flash relay is 60±10Hz; the operating frequency of the first PWM dimming unit 22 is 100Hz.

[0053] Optional, Figure 5FIG. 1 is a schematic diagram of the specific structure of another railway LED signal light system provided by an embodiment of the present invention; Figure 5 As shown, in some other embodiments, the flash control module 20 includes a solid-state relay 23 and a first PWM dimming unit 22: the solid-state relay 23 includes a normally closed contact control unit 231 and a normally open contact control unit 232;

[0054] The first end of the filament detection module 10 is electrically connected to the first input end of the power supply; the second end of the filament detection module 10 is electrically connected to the input end of the normally closed contact control unit 231 and the input end of the normally open contact control unit 231; the output end of the normally closed contact control unit 232 is connected to the LED signal light 30; the output end of the normally open contact control unit 232 is connected to the LED signal light 30 through the first PWM dimming unit 22;

[0055] The solid-state relay 23 is used to be in a third state and a fourth state under the frequency control instruction; wherein the third state is that the normally closed contact control unit 231 is in a closed state and the normally open contact control unit 232 is in an open state; the fourth state is that the normally closed contact control unit 231 is in an open state and the normally open contact control unit 232 is in a closed state;

[0056] The LED signal lamp 30 is used to be in a constant light state when the solid-state relay 23 is in the third state;

[0057] The first PWM dimming unit 22 is used to adjust the duty cycle to adjust the LED signal light 30 to a dimmed state when the solid-state relay 23 is in the third state; wherein the operating frequency of the first PWM unit 22 is much greater than the flashing frequency of the solid-state relay 23 .

[0058] Specifically, under the frequency control instruction, that is, the solid-state relay 23 is in different switching states at a certain frequency, when the solid-state relay 23 is in the third state, when the normally closed contact control unit 231 is in the closed state and the normally open contact control unit 232 is in the open state, the power directly enters the LED signal lamp 30 through the normally closed contact control unit 231, and the LED signal lamp 30 is in a normally bright state;

[0059] When the solid-state relay 23 is in the fourth state, when the normally closed contact control unit 231 is in the open state and the normally open contact control unit 232 is in the closed state, the power supply is output to the normally open contact control unit 232 and the first PWM dimming unit 22 to the LED signal light 30; because the first PWM dimming unit 22 can adjust its duty cycle to change the voltage output to the LED signal light 30, the LED signal light 30 is in an adjustable dimming state; in this way, the LED signal light's one-on-one flashing function is simultaneously realized; at the same time, because the filament detection module 10 is always connected in series with the LED signal light when the LED signal light 30 has the one-on-one flashing function, the filament detection module 10 can detect the filament state of the LED light in the one-on-one flashing state, thereby avoiding the filament detection module being unable to detect the filament state of the LED signal light due to the LED signal light being in the dimming state.

[0060] Similarly, the operating frequency of the first PWM dimming unit 22 is greater than the flashing frequency of the solid-state relay 23 at a preset multiple, wherein the preset multiple n satisfies 99≤n≤100; in this way, on the one hand, when the LED signal light is in a dimmed light state, visual persistence can be fully utilized so that the human eye does not feel the flickering of the light source; at the same time, there is no situation where the solid-state relay 23 and the first PWM dimming unit 22 are simultaneously in a disconnected state so that the flashing function cannot be realized; illustratively, the operating frequency of the solid-state relay 23 is 60±10Hz; the operating frequency of the first PWM dimming unit 22 is 100Hz.

[0061] Optional, in Figure 5 Further optimization based on the embodiment, Figure 6 FIG. 1 is a schematic diagram of the specific structure of another railway LED signal light system provided by an embodiment of the present invention; Figure 6 As shown, the dimming control module 20 further includes: a second PWM dimming unit 24 ; and an output end of the normally closed contact control unit 231 is connected to the LED signal lamp 30 via the second PWM dimming unit 24 .

[0062] In this embodiment, a second PWM dimming unit 24 can be added. By adjusting the duty cycle of the second PWM dimming unit 24, the brightness of the LED signal light 30 can also be adjusted. It can be understood that when the second PWM dimming unit 24 is added, the duty cycle of the first PWM dimming unit 22 needs to be adjusted to be smaller than the duty cycle of the second PWM dimming unit 24, so as to ensure the flashing function of the LED signal light 30.

[0063] Optional, see Figure 6, the operating frequency of the first PWM dimming unit 22 is equal to or not equal to the operating frequency of the second PWM dimming unit 24. In order to ensure the flashing function of the LED signal lamp 30, it is only necessary to adjust the duty cycle of the first PWM dimming unit 22 to be smaller than the duty cycle of the second PWM dimming unit 24, and the magnitude of the operating frequency of the first PWM dimming unit 22 and the operating frequency of the second PWM dimming unit 24 is not limited; the operating frequency of the first PWM dimming unit 22 is equal to or not equal to the operating frequency of the second PWM dimming unit 24.

[0064] Optional, see Figure 6 The filament detection module 10 includes a filament relay; wherein the filament relay is an electromagnetic relay. When the LED signal light is in a normal filament state, the LED signal light outputs a first current within a certain range. The first current is applied to the control pin of the electromagnetic relay, and the internal electromagnet is activated, thereby closing the contacts. When the LED signal light is in a broken filament state, the LED signal light outputs a second current within a certain range. The second current is applied to the control pin of the electromagnetic relay, and the internal electromagnet is not activated, thereby disconnecting the contacts, thereby achieving filament state detection of the LED signal light.

[0065] Optional, see Figure 6 , the operating current I range of the filament relay meets: 40mA≤I≤100mA;

[0066] Among them, the working current I range of the filament relay satisfies: 40mA≤100mA; that is, when the current applied to the control pin of the electromagnetic relay is less than 40mA, the contact is disconnected; when the current applied to the control pin of the electromagnetic relay is between 40mA and 100mA, the contact remains closed; since the LED signal lamp 30 may include LEDs connected in a variety of connection methods; when several LED units in the LED signal lamp 30 are broken, the LED signal lamp 30 outputs a current within a certain range; when the current within a certain range output by the LED signal lamp 30 is less than 40mA, the contact is disconnected; that is, the number of broken LEDs in the LED signal lamp 30 can be determined according to the working current I range of the filament relay.

[0067] Optional, Figure 7 is a specific structural diagram of another railway LED signal light system provided by an embodiment of the present invention; Figure 7 In some embodiments, the LED signal light 30 includes a lighting power supply control unit 31 and an LED light disk 32; the LED light disk 32 includes a plurality of LEDs connected in series; the lighting power supply control unit 31 is connected in parallel with the LED light disk 32. The lighting power supply control unit 31 may be a lighting protection unit, which plays a role in protecting and controlling the plurality of LEDs connected in series on the LED light disk 32.

[0068] Based on the same inventive concept, the embodiment of the present invention further provides a railway LED signal machine, which includes the railway LED signal light system described in the above embodiment. Since the railway LED signal machine includes the railway LED signal light system, it also has the beneficial effects of the above embodiment, which will not be described in detail here.

[0069] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A railway LED signal light system, characterized in that: include: A filament detection module, a flash control module and an LED signal light; the filament detection module is connected to the LED signal light through the flash control module; The flash control module is used to switch different control states under the frequency control instruction; The LED signal light is used to be in a constant light state when the flash control module is in a first control state; and is also used to be in a dimming state when the flash control module is in a second control state; The filament detection module is used to detect the filament state of the LED signal light when the LED signal light is in a constant light state and when the LED signal light is in a dimming light state; Wherein, the flash control module includes a flash relay and a first PWM dimming unit: the flash relay includes a first contact control unit and a second contact control unit; The first end of the filament detection module is electrically connected to the first input end of the power supply; the second end of the filament detection module is connected to the input end of the first contact control unit; the first output end of the first contact control unit is connected to the LED signal lamp; the second output end of the first contact control unit is connected to the first output end of the second contact control unit through the first PWM dimming unit; the second output end of the second contact control unit is connected to the LED signal lamp; the input end of the second contact control unit is electrically connected to the second input end of the power supply; the first output end of the first PWM dimming unit is electrically connected to the first output end of the first contact control unit; the second output end of the first PWM dimming unit is electrically connected to the second output end of the second contact control unit; The flasher relay is used to be in a first state and a second state under a frequency control instruction; wherein the first state is that the first contact control unit and the second contact control unit are both in a closed control state; the second state is that the first contact control unit and the second contact control unit are both in an open control state; The LED signal light is used to be in a constantly on state when the flash relay is in a first state; The first PWM dimming unit is used to adjust the duty cycle to adjust the LED signal light to a dimming state when the flash relay is in the second state; Wherein, the operating frequency of the first PWM dimming unit is greater than the flashing frequency of the flash relay at a preset multiple; wherein the preset multiple n satisfies 99≤n≤100; Alternatively, the flash control module includes a solid-state relay and a first PWM dimming unit: the solid-state relay includes a normally closed contact control unit and a normally open contact control unit; The first end of the filament detection module is electrically connected to the first input end of the power supply; the second end of the filament detection module is electrically connected to the input end of the normally closed contact control unit and the input end of the normally open contact control unit; the output end of the normally closed contact control unit is connected to the LED signal light; the output end of the normally open contact control unit is connected to the LED signal light through the first PWM dimming unit; The solid-state relay is used to be in a third state and a fourth state under a frequency control instruction; wherein the third state is that the normally closed contact control unit is in a closed state and the normally open contact control unit is in an open state; the fourth state is that the normally closed contact control unit is in an open state and the normally open contact control unit is in a closed state; The LED signal light is used to be in a constantly lit state when the solid-state relay is in the third state; The first PWM dimming unit is used to adjust the duty cycle to adjust the LED signal light to a dimming state when the solid-state relay is in the fourth state; Wherein, the operating frequency of the first PWM dimming unit is greater than a preset multiple of the flashing frequency of the solid-state relay; wherein, the preset multiple n satisfies 99≤n≤100.

2. The railway LED signal light system according to claim 1, characterized in that: When the flash relay includes a solid-state relay and the first PWM dimming unit, the flash control module further includes: a second PWM dimming unit; The first output end of the normally closed contact control unit is connected to the LED signal lamp through the second PWM dimming unit.

3. The railway LED signal light system according to claim 2, characterized in that: The flashing frequency of the first PWM dimming unit is equal to the operating frequency of the second PWM dimming unit.

4. The railway LED signal light system according to claim 2, characterized in that: The flashing frequency of the first PWM dimming unit is not equal to the operating frequency of the second PWM dimming unit.

5. The railway LED signal light system according to claim 1, characterized in that: The filament detection module includes a filament relay.

6. The railway LED signal light system according to claim 5, characterized in that: The operating current I range of the filament relay satisfies: 40mA≤I≤100mA.

7. The railway LED signal light system according to claim 1, characterized in that: The LED signal light includes a lighting power supply control unit and an LED light-emitting disk; the LED light-emitting disk includes a plurality of LEDs connected in series; The lighting power supply control unit is connected in parallel with the LED light emitting disk.

8. A railway LED signal, characterized in that: include: The railway LED signal light system as described in any one of claims 1 to 7 above.

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