Railway signal lamp and its lighting monitoring control device

Abstract

The application discloses a railway signal lamp and a lighting monitoring and controlling device thereof, the lighting monitoring and controlling device comprises a power module, a control module, a switching module, a rectifier module corresponding to each LED filament, a detection module and a constant current driving module, and the rectifier module and the constant current driving module form a lighting loop with the corresponding LED filament. The detection module is used for detecting whether the corresponding lighting loop is faulty; the control module is used for entering a circulating working mode when both of the lighting loops are not faulty, and entering a single working mode when one of the lighting loops is detected to be faulty; the circulating working mode is that the two rectifier modules are periodically and alternately connected to the power module through the switching module; and the single working mode is that the rectifier module of the other lighting loop is connected to the power module through the switching module. The technical scheme of the application not only makes the performance more stable, but also eliminates the safety hazards caused by human factors.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of railway signal lamp, in particular to a railway signal lamp and a lighting monitoring and control device thereof. BACKGROUND

[0002] At present, the railway signal lamp adopts tungsten filament railway signal bulb, and the lighting monitoring and control device thereof comprises two sets of tungsten filament signal lamp lighting unit circuits for monitoring and control. When the main tungsten filament signal lamp lighting unit circuit fails, the vice tungsten filament signal lamp lighting unit circuit is automatically switched to work, and an alarm is given. However, the existing lighting monitoring and control device has the following problems: 1) two sets of circuits, only the main circuit works for a long time, while the vice circuit is in a non-working state for a long time, resulting in high failure rate and short service life; 2) the failure of the vice circuit cannot be found in time, and whether the vice circuit works normally needs to be detected by professional technicians regularly. SUMMARY

[0003] The present application aims to solve the technical problems of high failure rate, short service life and the need for technical personnel in the prior art, and provides a railway signal lamp and a lighting monitoring and control device thereof.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a lighting monitoring and control device of a railway signal lamp is constructed, which is connected with two LED filaments, and comprises a power module, a control module, a switching module, a rectifier module corresponding to each LED filament, a detection module and a constant current driving module. Moreover, the rectifier module and the constant current driving module form a lighting loop with the corresponding LED filament. Wherein,

[0005] The rectifier module is used to convert the output voltage of the power module and output to the constant current driving module when the power module is connected;

[0006] The constant current driving module is used to output a constant current driving signal to the corresponding LED filament;

[0007] The detection module is used to detect whether the corresponding lighting loop is faulty;

[0008] The control module is used to enter a cycle working mode when both lighting loops are not faulty, enter a single working mode when one of the lighting loops is detected to be faulty, and

[0009] The cycle working mode is that the two rectifier modules are controlled by the switching module to be connected to the power module periodically and alternately to control the two lighting loops to be alternately in the lighting state;

[0010] The single-path working mode is that the rectifier module of another light circuit is controlled to access the power module by the switching module to control the another light circuit to be constantly in the lighting state.

[0011] Preferably, an anti-interference module is further arranged in each light circuit, and

[0012] The anti-interference module is configured to detect whether there is an interference signal in the corresponding light circuit, and eliminate the interference signal when the interference signal exists.

[0013] Preferably, the control module is further configured to control the rectifier module of another light circuit to access the power module by the switching module when it is detected that the light circuit being lit has an interference signal.

[0014] Preferably, the system further comprises:

[0015] An alarm module is configured to output an alarm signal when any light circuit fails.

[0016] Preferably, the system further comprises:

[0017] A transmission module is configured to transmit the working states of the two light circuits and the detection results of the detection module to a remote monitoring room.

[0018] Preferably, the switching module comprises a first relay, a first triode, a first resistor and a second resistor, wherein a first end of the first resistor is connected to a high level, a second end of the first resistor is connected to a first end of a coil of the first relay, a second end of the coil of the first relay is connected to a collector of the first triode, an emitter of the first triode is connected to ground through the second resistor, a base of the first triode is connected to a first output end of the control module; a moving contact of a switch of the first relay is connected to a first output end of the power module, two static contacts of the switch of the first relay are connected to first input ends of two rectifier modules one by one, and second input ends of the two rectifier modules are respectively connected to second output ends of the power module.

[0019] Preferably, the detection module comprises a detection resistor connected between a positive output end of a corresponding rectifier module and a voltage input end of a corresponding constant current driving module.

[0020] Preferably, the anti-interference module comprises a third resistor, a fourth resistor, a voltage stabilizing diode, an optical coupler and a bidirectional thyristor, wherein a first end of the third resistor is connected to a voltage input end of the constant current driving module, a second end of the third resistor is connected to a negative electrode of the voltage stabilizing diode, a positive electrode of the voltage stabilizing diode is connected to a positive input end of the optical coupler, a negative input end of the optical coupler is grounded, a positive output end of the optical coupler is connected to a first end of the fourth resistor, a second end of the fourth resistor is connected to a current output end of the constant current driving module and a first anode of the bidirectional thyristor respectively, a second anode of the bidirectional thyristor is connected to a positive electrode of the corresponding LED filament, and a negative output end of the optical coupler is connected to a control electrode of the bidirectional thyristor.

[0021] Preferably, the alarm module comprises a second relay, a second triode, a fifth resistor and a sixth resistor, wherein a first end of the fifth resistor is connected to a high level, a second end of the fifth resistor is connected to a first end of a coil of the second relay, a second end of the coil of the second relay is connected to a collector of the second triode, an emitter of the second triode is grounded through the sixth resistor, a base of the second triode is connected to a second output end of the control module, and a switch of the second relay is connected to an alarm.

[0022] The present application also constructs a railway signal lamp, comprising:

[0023] two-way LED filaments;

[0024] The above-mentioned lighting monitoring control device.

[0025] The technical scheme of the present application can not only reduce the failure rate, improve the service life and make the performance more stable, but also no longer needs professional technicians to detect on site regularly, greatly reduces the configuration of technicians, improves the work efficiency and eliminates the safety hidden danger of human factors. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in combination with the drawings and embodiments, wherein:

[0027] Figure 1 is a logic structure diagram of the lighting monitoring control device of the railway signal lamp of the present application, embodiment one;

[0028] Figures 2A to 2G is a circuit diagram of the lighting monitoring control device of the railway signal lamp of the present application, embodiment two. DETAILED DESCRIPTION

[0029] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0030] Figure 1 FIG. 1 is a logic structure diagram of a first embodiment of a lighting monitoring and control device of a railway signal lamp according to the present application. The lighting monitoring and control device is connected with two LED filaments 71 and 72. The lighting monitoring and control device of the embodiment includes a power supply module 10, a switching module 20, a control module 30, and two rectifier modules 41 and 42, two detection modules 51 and 52, two constant current drive modules 61 and 62, and two anti-interference modules 81 and 82. The rectifier module 41, the detection module 51, the constant current drive module 61, and the anti-interference module 81 correspond to the LED filament 71, and the rectifier module 41 and the constant current drive module 51 form a first lighting loop with the LED filament 71. The rectifier module 42, the detection module 52, the constant current drive module 62, and the anti-interference module 82 correspond to the LED filament 72, and the rectifier module 42 and the constant current drive module 52 form a second lighting loop with the LED filament 72.

[0031] In the embodiment, the rectifier modules 41 and 42 are configured to convert the output voltage of the power supply module 10 when the power supply module 10 is connected, and output to the corresponding constant current drive modules 61 and 62. The constant current drive modules 61 and 62 are configured to output constant current drive signals to the corresponding LED filaments 71 and 72. The detection modules 51 and 52 are configured to detect whether the corresponding lighting loop is faulty. The control module 30 is configured to enter a cycle working mode when both lighting loops are not faulty, and enter a single working mode when one of the lighting loops is detected to be faulty. The cycle working mode is to control the two lighting loops to alternately be in the lighting state by the switching module 20 controlling the two rectifier modules 41 and 42 to periodically and alternately connect to the power supply module 10. The single working mode is to control the other lighting loop to constantly be in the lighting state by the switching module 20 controlling the rectifier module of the other lighting loop to connect to the power supply module 10. For example, assuming that the first lighting loop is faulty, the control module 30 will control the rectifier module 42 to connect to the power supply module 10 through the switching module 20, so that the second lighting loop constantly is in the lighting state.

[0032] Through the technical scheme of the embodiment, the two same lighting circuits have no master and sub, and when both of the two lighting circuits are not faulty, the control module controls the first lighting circuit to work for a period of time and then automatically switches to the second lighting circuit to work, and the second lighting circuit works for a period of time and then automatically switches to the first lighting circuit, so that the two lighting circuits are cyclically switched to work. If one of the lighting circuits is faulty, the other lighting circuit is immediately switched to work, so that the lighting monitoring control device of the embodiment is intelligent and automatically works. In this way, not only the failure rate is reduced, the service life is improved, and the performance is more stable, but also professional technicians are no longer needed to detect on site regularly, the number of technicians is greatly reduced, the work efficiency is improved, and the safety hidden danger of human factors is eliminated.

[0033] Further, since the railway signal lamp is installed at the side of the railway, the railway signal lamp is easily disturbed by electromagnetic signals when a train passes. In order to eliminate the influence of the interference signals, an anti-interference module 81, 82 is arranged in each lighting circuit, and the anti-interference module 81, 82 is used to detect whether there is an interference signal in the corresponding lighting circuit, and eliminate the interference signal when the interference signal exists. In addition, the control module 30 is also used to control the rectifier module of the other lighting circuit to be connected to the power module 10 through the switching module 20 when it is detected that the lighting circuit being lit has an interference signal.

[0034] Further, the lighting monitoring control device of the embodiment further comprises an alarm module 90, which is used to output an alarm signal when any lighting circuit is faulty. In addition, the control module 30 can also perform self-checking when powered on and / or switched, and an alarm signal will also be output when a fault is detected by self-checking.

[0035] Further, the lighting monitoring control device of the embodiment further comprises a transmission module, for example, a remote intelligent control port. The transmission module is used to transmit the working state of the two lighting circuits and the detection result of the detection module to a remote monitoring room, so that the working state of the product can be known at any time by the monitoring center, and the system is more intelligent.

[0036] Figures 2A to 2G The circuit diagram of the lighting monitoring control device of the second embodiment of the application is shown in the figure. The lighting monitoring control device of the embodiment comprises a power module, a switching module, a control module, an alarm module, and two rectifier modules, two detection modules, two constant current driving modules, and two anti-interference modules.

[0037] In combination with Figure 2AThe power module L1 is a voltage converter with multiple input interfaces. The switching module includes: a first relay KM1, a first transistor Q1, a first resistor R10, and a second resistor R11. The first end of the first resistor R10 is connected to a high level, the second end of the first resistor R10 is connected to the first end K1 of the coil of the first relay KM1, the second end K2 of the coil of the first relay KM1 is connected to the collector of the first transistor Q1, the emitter of the first transistor Q1 is grounded via the second resistor R11, and the base of the first transistor Q1 is connected to the first output terminal (C) of the control module via a resistor R12. Of course, resistor R12 can also be omitted in other embodiments. The moving contact K3 of the switch of the first relay KM1 is connected to the first output end of the power module L1, the first static contact K4 of the switch of the first relay KM1 is connected to the first input end (A) of the rectifier module DB1, the second static contact K5 of the switch of the first relay KM1 is connected to the first input end (B) of the rectifier module DB2, and the second input end of the rectifier module DB1 and the second input end of the rectifier module DB2 are respectively connected to the second output end (D) of the power module.

[0038] Combine Figure 2B The control module includes MCU U1, data storage chip U2, capacitors C9 and C10, and crystal oscillator Y1. Data storage chip U2 is pre-programmed with a switching cycle, which can be any value between 1 and 24 hours. The first end of crystal oscillator Y1 is grounded via capacitor C9, and the second end of crystal oscillator Y1 is grounded via capacitor C10. The first and second ends of crystal oscillator Y1 are connected to pins 2 and 3 of data storage chip U2, respectively. Pin 5 of data storage chip U2 is connected to pin 8 of MCU U1 for transmitting a reset signal (RST). Pin 6 of data storage chip U2 is connected to pin 9 of MCU U1. Pin 7 of data storage chip U2 is connected to pin 10 of MCU U1.

[0039] Combine Figure 2C 、 Figure 2D Both rectifier modules are rectifier bridges DB1 and DB2. Both detection modules are equipped with detection resistors RI1 and RI2. Detection resistor RI1 is connected in series between the positive output of rectifier module DB1 and the voltage input (G) of the constant current driver module, while detection resistor RI2 is connected in series between the positive output of rectifier module DB2 and the voltage input (I) of the constant current driver module. Furthermore, the second end (E) of detection resistor RI1 is connected to pin 11 of MCU U1, and the second end (F) of detection resistor RI2 is connected to pin 7 of MCU U1.

[0040] Combine Figure 2EIn the first constant current drive module, the voltage input end (pin 7) of the constant current drive chip U3 is connected to the second end of the detection resistor RI1 through the fuse F1, and the constant current output end (pin 8) of the constant current drive chip U3 is connected to the positive electrode of the first LED filament. In the first anti-interference module, the first end of the resistor RM1 is connected to the voltage input end (G) of the first constant current drive module, the second end of the resistor RM1 is connected to the negative electrode of the voltage stabilizing diode WE1, the positive electrode of the voltage stabilizing diode WE1 is connected to the positive input end of the optocoupler U5, the negative input end of the optocoupler U5 is connected to the ground through the resistor RM2, the positive output end of the optocoupler U5 is connected to the first end of the resistor RM3, the second end of the resistor RM3 is respectively connected to the current output end of the constant current drive chip U3 and the first anode of the bidirectional thyristor Q3, the second anode of the bidirectional thyristor Q3 is connected to the positive electrode of the first LED filament, and the negative output end of the optocoupler U5 is connected to the control electrode of the bidirectional thyristor Q3.

[0041] In combination Figure 2F In the second constant current drive module, the voltage input end (pin 7) of the constant current drive chip U4 is connected to the second end of the detection resistor RI2 through the fuse F2, and the constant current output end (pin 8) of the constant current drive chip U4 is connected to the positive electrode of the second LED filament. In the second anti-interference module, the first end of the resistor RM4 is connected to the voltage input end (I) of the second constant current drive module, the second end of the resistor RM4 is connected to the negative electrode of the voltage stabilizing diode D1, the positive electrode of the voltage stabilizing diode WE2 is connected to the positive input end of the optocoupler U6, the negative input end of the optocoupler U6 is connected to the ground through the resistor RM5, the positive output end of the optocoupler U6 is connected to the first end of the resistor RM6, the second end of the resistor RM6 is respectively connected to the current output end of the constant current drive chip U4 and the first anode of the bidirectional thyristor Q4, the second anode of the bidirectional thyristor Q4 is connected to the positive electrode of the second LED filament, and the negative output end of the optocoupler U6 is connected to the control electrode of the bidirectional thyristor Q4.

[0042] In combination Figure 2G The alarm module includes a second relay KM2, a second triode Q2, a fifth resistor R1 and a sixth resistor R2, wherein the first end of the fifth resistor R1 is connected to a high level, the second end of the fifth resistor R1 is connected to the first end of the coil of the second relay KM2, the second end of the coil of the second relay KM2 is connected to the collector of the second triode Q2, the emitter of the second triode Q2 is connected to the ground through the sixth resistor R2, and the base of the second triode Q2 is connected to the second output end (K) of the MCU U1. The switch of the second relay is connected to an alarm.

[0043] The working principle of the light-on monitoring control device of the embodiment will be described below:

[0044] Firstly, under any of the following conditions: power-on, restart, preparation for switching the light-on loop, and regularly, the MCU U1 can perform self-checking to determine whether it is working normally, and if it is abnormal, the cycle is cancelled and an alarm is given.

[0045] When the MCU is normal, the data storage chip U2 has a switching time due to preset writing, so it can enter the cycle working mode according to the switching time (for example, 24 hours): the rectifier module DB1, DB2 of the two light circuit is connected to the power module L1 alternately, so as to realize the two LED filaments alternately lighting. Specifically, when it is needed to switch to the second LED filament, the first output end (pin 6) of the MCU U1 outputs high level, the first triode Q1 is turned on, the coil of the first relay KM1 is powered, and the moving contact K3 is connected to the static contact K5, so that the rectifier module DB2 is connected to the power module L1. When it is needed to switch to the first LED filament, the first output end (pin 6) of the MCU U1 outputs low level, the first triode Q1 is turned off, the coil of the first relay KM1 is powered, and the moving contact K3 is connected to the static contact K4, so that the rectifier module DB1 is connected to the power module L1.

[0046] When the rectifier module is connected to the power module L1, taking the first light circuit as an example, the rectifier module DB1 converts the alternating voltage output by the power module L1 into direct current voltage, and outputs to the constant current drive chip U3 through the current detection resistor RI1, and the constant current drive chip U3 outputs a constant current drive signal to the first LED filament through its pin 8, so as to light up the first LED filament. It should be understood that the working principle of the second light circuit is the same as that of the first light circuit, and will not be repeated here.

[0047] When the light monitoring control device works, the MCU U1 can also detect the voltage of the resistors RI1, RI2 in real time, and judge whether the open circuit or short circuit occurs in the light circuit being lit by the detected voltage, and when the open circuit or short circuit occurs, it switches to another light circuit by changing the level signal output by its pin 6.

[0048] In addition, assuming that the first lighting circuit is in the lighting state, if the first lighting circuit (i.e. the lighting circuit) is affected by the electromagnetic signal interference source, at this time, the voltage stabilizing tube WE1 in the first lighting circuit limits the interference voltage, so that the constant current driving chip U3 has a stable working environment. At the same time, if the interference voltage is very large, the MCU U1 judges that the voltage change amplitude at the pin 11 end exceeds the preset value, and changes the voltage at the pin 6 end to switch to the second lighting circuit lighting. Conversely, assuming that the first lighting circuit is in the lighting state, if the second lighting circuit (i.e. the non-lighting lighting circuit) is affected by the electromagnetic signal interference source, at this time, the voltage stabilizing tube WE2 in the second lighting circuit limits the interference voltage, and by properly setting the parameters of the components, the input voltage is less than the on voltage of the optocoupler U6, the optocoupler U6 does not act, and the bidirectional thyristor Q4 is not conductive, so as to prevent the interference voltage from causing the second LED filament, thereby avoiding the second LED filament from being mistakenly lit.

[0049] In the working process of the lighting monitoring control device, if a fault occurs, the fault type can include: open circuit / short circuit of any lighting circuit (for example, LED filament failure, constant current driving module failure, switching module failure), MCU self-checking failure, alarm module itself failure, and the MCU outputs high level through the second output end (pin 2), at this time, the second triode Q2 is turned on, the coil of the second relay KM2 is powered on, and the alarm works to output an alarm signal.

[0050] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of claims of the present application.

Claims

1. A lighting monitoring and control device for a railway signal lamp, connected to two LED filaments and including a power module, characterized in that: Also includes: A control module, a switching module, and a rectifier module, a detection module, and a constant current drive module corresponding to each LED filament. The rectifier module, the constant current drive module, and the corresponding LED filament form a lighting circuit. The rectifier module is used to convert the output voltage of the power module and output it to the constant current drive module when connected to the power module; The constant current driving module is used to output a constant current driving signal to the corresponding LED filament; The detection module is used to detect whether the corresponding lighting circuit is faulty; The control module is used to enter the cyclic working mode when both lighting circuits are fault-free; and enter the single-circuit working mode when a fault is detected in one of the lighting circuits; and The cyclic working mode is: the switching module controls the two rectifier modules to periodically and alternately connect to the power module to control the two lighting circuits to be alternately in the lighting state, and the switching cycle is 1 to 24 hours; The single-circuit working mode is: the switching module controls the rectifier module of another lighting circuit to be connected to the power module to control the other lighting circuit to be always in the lighting state; The lighting monitoring and control device further includes an anti-interference module arranged in each lighting circuit, and The anti-interference module is used to detect whether there is an interference signal in the corresponding lighting circuit, and eliminate the interference signal when there is an interference signal; The anti-interference module includes: a third resistor, a fourth resistor, a voltage-stabilizing diode, an optocoupler and a bidirectional thyristor, wherein the first end of the third resistor is connected to the voltage input end of the constant current driving module, the second end of the third resistor is connected to the negative electrode of the voltage-stabilizing diode, the positive electrode of the voltage-stabilizing diode is connected to the positive input end of the optocoupler, the negative input end of the optocoupler is grounded, the positive output end of the optocoupler is connected to the first end of the fourth resistor, the second end of the fourth resistor is respectively connected to the current output end of the constant current driving module and the first anode of the bidirectional thyristor, the second anode of the bidirectional thyristor is connected to the positive electrode of the corresponding LED filament, and the negative output end of the optocoupler is connected to the control electrode of the bidirectional thyristor.

2. The lighting monitoring control device according to claim 1, characterized in that: The control module is further configured to control the rectifier module of another lighting circuit to connect to the power module through the switching module when an interference signal is detected in the lighting circuit being lit.

3. The lighting monitoring control device according to claim 1, characterized in that: Also includes: The alarm module is used to output an alarm signal when any lighting circuit fails.

4. The lighting monitoring control device according to claim 1, characterized in that: Also includes: The transmission module is used to transmit the working status of the two lighting circuits and the detection results of the detection module to the remote monitoring room.

5. The lighting monitoring control device according to any one of claims 1 to 4, characterized in that: The switching module includes: a first relay, a first transistor, a first resistor, and a second resistor, wherein the first end of the first resistor is connected to a high level, the second end of the first resistor is connected to the first end of the coil of the first relay, the second end of the coil of the first relay is connected to the collector of the first transistor, the emitter of the first transistor is grounded through the second resistor, and the base of the first transistor is connected to the first output end of the control module; the moving contact of the switch of the first relay is connected to the first output end of the power module, the two static contacts of the switch of the first relay are connected to the first input ends of the two rectifier modules in a one-to-one correspondence, and the second input ends of the two rectifier modules are respectively connected to the second output ends of the power module.

6. The lighting monitoring control device according to any one of claims 1 to 4, characterized in that: The detection module includes a detection resistor connected between the positive output terminal of the corresponding rectifier module and the voltage input terminal of the corresponding constant current driving module.

7. The lighting monitoring control device according to claim 3, characterized in that: The alarm module includes: a second relay, a second transistor, a fifth resistor and a sixth resistor, wherein the first end of the fifth resistor is connected to a high level, the second end of the fifth resistor is connected to the first end of the coil of the second relay, the second end of the coil of the second relay is connected to the collector of the second transistor, the emitter of the second transistor is grounded through the sixth resistor, and the base of the second transistor is connected to the second output end of the control module; the switch of the second relay is connected to the alarm.

8. A railway signal light, characterized in that: include: Two-way LED filament; The lighting monitoring control device according to any one of claims 1 to 7.

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