Train carriage lighting drive power supply fault control method, circuit and lighting system

Abstract

The present invention discloses a train carriage lighting drive power supply fault control method, circuit and lighting system, the method comprising: obtaining the output voltage value of at least two drive power supplies; when the output voltage value is detected to be abnormal, restarting the corresponding drive power supply, and further detecting whether the output voltage value is abnormal; when the output voltage value is still abnormal after the drive power supply is restarted, outputting a fault signal to a host computer; when the output voltage value is detected to be normal, obtaining the output current value of at least two drive power supplies; when the output current value is abnormal, restarting the corresponding drive power supply, and further detecting whether the output current value is abnormal; when the output current value is still abnormal after the drive power supply is restarted, outputting a fault signal to a host computer. The present invention can realize real-time monitoring of the health of the train carriage lighting system, can self-repair soft faults in real time, and can output fault codes to a host computer, so as to handle the drive power supply fault in time, thereby improving safety and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of train carriage lighting, and in particular to a train carriage lighting driving power supply failure control method, circuit and lighting system. Background Art

[0002] The train compartment lighting system involves the safety of driving and personnel, so it has high reliability requirements. At present, the train compartment lighting generally adopts a centralized power supply lighting and redundant design scheme, that is, under normal circumstances, the compartment lighting system is powered by two sets of identical drive power supplies. When one of the drive power supplies fails, the other drive power supply can ensure that normal lighting is not affected.

[0003] However, although the existing train carriage lighting system has a redundant power supply design, when one of the driving power supplies fails, the working status of the driving power supply cannot be monitored and repaired in time. If a failure occurs, the staff cannot obtain the fault information in time.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a train carriage lighting drive power supply fault control method, circuit and lighting system to solve the problems that the existing train carriage lighting system is unable to monitor the working status of the drive power supply, is unable to repair the fault in time, and the staff is unable to obtain fault information in time when a fault occurs.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect, the present invention provides a method for controlling a train compartment lighting driving power supply failure, comprising:

[0008] Obtain output voltage values ​​of at least two driving power supplies;

[0009] When an abnormal output voltage value is detected, the corresponding driving power supply is restarted, and the output voltage value is further detected to see if it is abnormal;

[0010] When the output voltage value is still abnormal after the drive power is restarted, a fault signal is output to the host computer;

[0011] When it is detected that the output voltage is positive, the output current values ​​of at least two driving power supplies are obtained;

[0012] When the output current value is abnormal, restart the corresponding driving power supply and further detect whether the output current value is abnormal;

[0013] When the output current value is still abnormal after the drive power is restarted, a fault signal is output to the host computer.

[0014] According to a further configuration of the present invention, when an abnormal output voltage value is detected, the step of restarting the corresponding driving lighting power supply and further detecting whether the output voltage value is abnormal includes:

[0015] The obtained output voltage value is compared with the preset voltage value, and when the output voltage value is inconsistent with the preset voltage value, it is confirmed that the output voltage value is abnormal;

[0016] When it is confirmed that the output voltage value is abnormal, a reset and restart instruction is output to the corresponding driving power supply to restart the driving power supply, and the output voltage value of the restarted driving power supply is compared with the preset voltage value.

[0017] According to a further configuration of the present invention, when it is confirmed that the output voltage value is abnormal, the steps of outputting a reset restart instruction to the corresponding driving power supply to restart the driving power supply, and comparing the output voltage value of the restarted driving power supply with the preset voltage value include:

[0018] When the output voltage value of the driving power supply after the restart is still abnormal, the driving power supply is restarted again according to the preset interval time; wherein the number of restarts is set to 3-5 times.

[0019] According to a further configuration of the present invention, when the output current value is abnormal, the step of restarting the corresponding driving power supply and further detecting whether the output current value is abnormal comprises:

[0020] The obtained output current value is compared with the preset current value. When the output current value is inconsistent with the preset current value, it is confirmed that the output current value is abnormal;

[0021] When it is confirmed that the output current value is abnormal, a reset and restart instruction is output to the corresponding driving power supply to restart the driving power supply, and the output current value of the driving power supply after the restart is compared with the preset current value.

[0022] According to a further configuration of the present invention, when the output current value is confirmed to be abnormal, the steps of outputting a reset and restart instruction to the corresponding driving power supply to restart the driving power supply, and comparing the output current value of the restarted driving power supply with the preset current value include:

[0023] When the output current value of the driving power supply after the restart is still abnormal, the driving power supply is restarted again according to the preset interval time; wherein the number of restarts is set to 3-5 times.

[0024] In a second aspect, the present invention further provides a train compartment lighting drive power supply fault control method, which comprises:

[0025] Obtain output current values ​​of at least two driving power supplies;

[0026] When an abnormal output current value is detected, the corresponding driving power supply is restarted, and the output current value is further detected to see if it is abnormal;

[0027] When the output current value is still abnormal after the drive power is restarted, a fault signal is output to the host computer;

[0028] When it is detected that the output current value is normal, obtaining output voltage values ​​of at least two driving power supplies;

[0029] When the output voltage value is abnormal, restart the corresponding driving power supply, and further detect whether the output voltage value is abnormal;

[0030] When the output voltage value is still abnormal after the drive power is restarted, a fault signal is output to the host computer.

[0031] In a third aspect, the present invention further provides a train carriage lighting drive power supply failure control circuit for implementing the train carriage lighting drive power supply failure control method as described above, which includes a first drive power supply, a second drive power supply, a first voltage sampling unit, a first current sampling unit, a second voltage sampling unit, a second current sampling unit, a reset restart unit and a control unit; wherein,

[0032] The first voltage sampling unit is connected to the first driving power supply and the control unit respectively, and is used to collect the output voltage value of the first driving power supply;

[0033] The first current sampling unit is connected to the first driving power supply and the control unit respectively, and is used to collect the output current value of the first driving power supply;

[0034] The second voltage sampling unit is connected to the second driving power supply and the control unit respectively, and is used to collect the output voltage value of the second driving power supply;

[0035] The second current sampling unit is connected to the second driving power supply and the control unit respectively, and is used to collect the output current value of the second driving power supply;

[0036] The reset and restart unit is connected to the first driving power supply, the second driving power supply and the control unit respectively, and is used to control the first driving power supply and the second driving power supply to reset;

[0037] The control unit is used to confirm whether the first driving power supply is abnormal based on the output voltage value collected by the first voltage sampling unit and the output current value collected by the first current sampling unit, and to confirm whether the second driving power supply is abnormal based on the output voltage value collected by the second voltage sampling unit and the output current value collected by the second current sampling unit, and to output a reset and restart instruction to control the first driving power supply and the second driving power supply to restart.

[0038] According to a further configuration of the present invention, the train compartment lighting driving power supply fault control circuit further includes: a first protection unit, a second protection unit, a third protection unit and a fourth protection unit; wherein,

[0039] The first protection unit is connected between the first voltage sampling unit and the control unit, and is used to prevent the control unit from being damaged when the first driving power supply is abnormal;

[0040] The second protection unit is connected between the first current sampling unit and the control unit, and is used to prevent the control unit from being damaged when the first driving power supply is abnormal;

[0041] The third protection unit is connected between the second voltage sampling unit and the control unit, and is used to prevent the control unit from being damaged when the second driving power supply is abnormal;

[0042] The fourth protection unit is connected between the second current protection unit and the control unit, and is used to prevent the control unit from being damaged when the second driving power supply is abnormal.

[0043] In a further configuration of the present invention, the first voltage sampling unit includes a first resistor and a second resistor; the first current sampling unit includes a third resistor; the second voltage sampling unit includes a fourth resistor and a fifth resistor; the second current sampling unit includes a sixth resistor; the first protection unit includes a seventh resistor and a first voltage regulator diode; the second protection unit includes an eighth resistor and a second voltage regulator diode; the third protection unit includes a ninth resistor and a third voltage regulator diode; the fourth protection unit includes a tenth resistor and a fourth voltage regulator diode;

[0044] One end of the first resistor is connected to the voltage output end of the first driving power supply, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is grounded;

[0045] The common end of the first resistor and the second resistor is connected to one end of the seventh resistor, the other end of the seventh resistor is respectively connected to the cathode of the first voltage zener diode and the control unit, and the anode of the first voltage zener diode is grounded;

[0046] One end of the third resistor is respectively connected to the current output end of the first driving power supply and one end of the eighth resistor, the other end of the third resistor is grounded, the other end of the eighth resistor is respectively connected to the cathode of the second voltage zener diode and the control unit, and the anode of the second voltage zener diode is grounded;

[0047] One end of the fourth resistor is connected to the voltage output end of the second driving power supply, the other end of the fourth resistor is connected to one end of the fifth resistor, and the other end of the fifth resistor is grounded; the common end of the fourth resistor and the fifth resistor is connected to one end of the ninth resistor, the other end of the ninth resistor is respectively connected to the cathode of the third voltage zener diode and the control unit, and the anode of the third voltage zener diode is grounded;

[0048] One end of the sixth resistor is respectively connected to the current output end of the second driving power supply and one end of the tenth resistor, and the other end of the sixth resistor is grounded; the other end of the tenth resistor is respectively connected to the cathode of the fourth voltage zener diode and the control unit, and the anode of the fourth voltage zener diode is grounded;

[0049] The reset and restart unit includes an eleventh resistor, a twelfth resistor, a first optocoupler and a second optocoupler; wherein, one end of the eleventh resistor is connected to the control unit, the other end of the eleventh resistor is connected to the transmitting side of the first optocoupler, and the receiving side of the first optocoupler is connected to the reset pin of the first driving power supply; one end of the twelfth resistor is connected to the control unit, the other end of the twelfth resistor is connected to the transmitting side of the second optocoupler, and the receiving side of the second optocoupler is connected to the reset pin of the second driving power supply.

[0050] In a fourth aspect, the present invention further provides a lighting system, which includes the train carriage lighting drive power supply failure control circuit as described above.

[0051] The present invention provides a train carriage lighting drive power supply fault control method, circuit and lighting system, the train carriage lighting drive power supply fault control method comprises: obtaining the output voltage value of at least two drive power supplies; when the output voltage value is detected to be abnormal, restarting the corresponding drive power supply, and further detecting whether the output voltage value is abnormal; when the output voltage value is still abnormal after the drive power supply is restarted, outputting a fault signal to the host computer; when the output voltage value is detected to be normal, obtaining the output current value of at least two drive power supplies; when the output current value is abnormal, restarting the corresponding drive power supply, and further detecting whether the output current value is abnormal; when the output current value is still abnormal after the drive power supply is restarted, outputting a fault signal to the host computer. The present invention monitors the output voltage value and output current value of the train carriage drive power supply in real time, and when the output voltage value or the output current value is detected to be abnormal, the corresponding abnormal drive power supply can be restarted, so that the real-time monitoring of the health of the train carriage lighting system can be realized, and the soft fault can be repaired in real time. If the drive power supply is still in a faulty state after the restart, the fault code is output to the host computer, so that the staff can handle the drive power supply fault in time, thereby improving the safety and reliability of the train lighting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary personnel in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0053] Figure 1 It is a flow chart of a train carriage lighting drive power supply failure control method in one embodiment of the present invention.

[0054] Figure 2 It is a flow chart of a train carriage lighting drive power supply failure control method in one embodiment of the present invention.

[0055] Figure 3 It is a flow chart of a train carriage lighting drive power supply failure control method in another embodiment of the present invention.

[0056] Figure 4 The present invention is a block diagram of a train carriage lighting drive power supply failure control circuit in one embodiment of the present invention.

[0057] Figure 5 It is a current principle diagram of the fault control current of the train compartment lighting driving power supply in one embodiment of the present invention.

[0058] The marks in the accompanying drawings are: 100, first driving power supply; 200, second driving power supply; 300, first voltage sampling unit; 400, first current sampling unit; 500, second voltage sampling unit; 600, second current sampling unit; 700, reset restart unit; 800, control unit; 900, first protection unit; 1000, second protection unit; 1100, third protection unit; 1200, fourth protection unit. DETAILED DESCRIPTION

[0059] The present invention provides a train compartment lighting drive power supply fault control method, circuit and lighting system. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0060] In the embodiments and the scope of the patent application, unless the text specifically defines the article, "a", "an", "the" and "the" may also include plural forms. If there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0061] It should be further understood that the wording "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when an element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can also be an intermediate element. In addition, the "connection" or "coupling" used here can include wireless connection or wireless coupling. The wording "and / or" used here includes all or any unit and all combinations of one or more items listed in association.

[0062] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0063] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0064] Please also see Figures 1 to 3 The present invention provides a preferred embodiment of a train carriage lighting drive power supply failure control method.

[0065] In some embodiments, Figure 1 As shown, the present invention provides a method for controlling a train compartment lighting driving power supply failure, which comprises the steps of:

[0066] S100, obtaining output voltage values ​​of at least two driving power supplies;

[0067] Specifically, the train carriage lighting system adopts a redundant design scheme for power supply lighting, and has at least two driving power supplies. This embodiment takes two driving power supplies as an example, and the power output ends of the two driving power supplies both have redundant ports, and the power output ends of the two driving power supplies are connected together. When one of the driving power supplies fails, the other driving power supply can provide power.

[0068] In this embodiment, the control unit adopts a single chip microcomputer, and the single chip microcomputer can use a voltage sampling circuit to collect the output voltage values ​​of the two driving power supplies.

[0069] S200, when it is detected that the output voltage value is abnormal, restart the corresponding driving power supply, and further detect whether the output voltage value is abnormal;

[0070] Please combine Figure 2 In this embodiment, when the single-chip microcomputer detects that the output voltage value is in an abnormal state, the abnormal driving power supply can be restarted to achieve real-time self-repair of soft faults. After the driving power supply is restarted, the output voltage value of the restarted driving power supply will be collected and detected again to detect in real time whether the working state of the driving power supply is normal or abnormal.

[0071] S300: When the output voltage value is still abnormal after the drive power is restarted, a fault signal is output to the host computer;

[0072] Please combine Figure 2 In this embodiment, when the output voltage value of the driving power supply is detected to be abnormal, the fault signal will not be directly reported to the host computer. Instead, when it is detected that the output voltage value of the driving power supply is still in an abnormal state after restarting the driving power supply, it is confirmed that the currently detected driving power supply is a faulty power supply and needs to be repaired by staff.

[0073] S400, when it is detected that the output voltage value is normal, obtaining output current values ​​of at least two driving power supplies;

[0074] In this embodiment, in order to improve the accuracy of detection, in addition to detecting the output voltage of the driving power supply, it is also confirmed whether the output current of the driving power supply is normal. If the output voltage and output current of the driving power supply are normal, it can be confirmed that the currently detected driving power supply is in a normal working state, otherwise it is in a fault state.

[0075] S500, when the output current value is abnormal, restart the corresponding driving power supply, and further detect whether the output current value is abnormal;

[0076] Please combine Figure 2In this embodiment, when it is detected that the output current of the driving power supply is abnormal, the driving power supply with the abnormality is restarted. After the driving power supply is restarted, the output current of the driving power supply is re-detected again. If the detected output current is still abnormal, it means that the driving power supply is in a fault state.

[0077] S600: When the output current value is still abnormal after the drive power is restarted, a fault signal is output to the host computer.

[0078] Please combine Figure 2 In this embodiment, when the output current of the driving power supply is detected to be abnormal, and the abnormal state is still not eliminated after the driving power supply is restarted, the current driving power supply is confirmed to be a faulty power supply, and the single chip will send a fault signal to the host computer so that the staff can know it. It should be noted that the host computer can be a workbench of the staff.

[0079] It can be seen that in the above technical scheme, the present invention monitors the output voltage value and the output current value of the train car driving power supply in real time. When an abnormality is detected in the output voltage value or the output current value, the corresponding abnormal driving power supply can be restarted, thereby realizing real-time monitoring of the health status of the train car lighting system and self-repairing soft faults in real time. If the driving power supply is still in a faulty state after restarting, the fault code will be output to the host computer, so that the staff can deal with the driving power supply fault in time, thereby improving the safety and reliability of the train lighting system.

[0080] In some embodiments, when an abnormal output voltage value is detected, the step of restarting the corresponding driving lighting power supply and further detecting whether the output voltage value is abnormal includes:

[0081] S210, comparing the obtained output voltage value with the preset voltage value, and when the output voltage value is inconsistent with the preset voltage value, confirming that the output voltage value is abnormal;

[0082] S220: When it is confirmed that the output voltage value is abnormal, a reset and restart instruction is output to the corresponding driving power supply to restart the driving power supply, and the output voltage value of the restarted driving power supply is compared with a preset voltage value.

[0083] Specifically, a preset voltage value is set in the single-chip microcomputer. The single-chip microcomputer can compare the output voltage value obtained from the power output end of the driving power supply with the preset voltage value to know whether the output voltage value is within the preset voltage value range, thereby judging whether the driving power supply is abnormal. If the driving power supply is judged to be abnormal, a reset and restart signal can be output to the restart end of the driving power supply to reset and restart the driving power supply, and then the output voltage of the driving power supply is monitored again, and the above process is repeated.

[0084] In some embodiments, when it is confirmed that the output voltage value is abnormal, the steps of outputting a reset restart instruction to the corresponding driving power supply to restart the driving power supply, and comparing the output voltage value of the restarted driving power supply with the preset voltage value include:

[0085] S221. When the output voltage value of the driving power supply after the restart is still abnormal, restart the driving power supply again according to the preset interval time; wherein the number of restarts is set to 3-5 times.

[0086] In this embodiment, in order to avoid false alarms, when the output voltage of the driving power supply is still abnormal after the first restart, the fault will not be reported immediately. Instead, after repeated restarts for several times, if the restart is successful, normal operation will continue. If the voltage output of the driving power supply is still abnormal, a fault signal will be output to the host computer to inform the staff that the driving power supply needs maintenance. In one implementation, the number of restarts for the driving power supply with abnormal output voltage is set to 3 times.

[0087] In some embodiments, when the output current value is abnormal, the step of restarting the corresponding driving power supply and further detecting whether the output current value is abnormal includes:

[0088] S510, comparing the obtained output current value with the preset current value, and when the output current value is inconsistent with the preset current value, confirming that the output current value is abnormal;

[0089] S520: When it is confirmed that the output current value is abnormal, a reset and restart instruction is output to the corresponding driving power supply to restart the driving power supply, and the output current value of the restarted driving power supply is compared with a preset current value.

[0090] Specifically, a preset current value is set in the single-chip microcomputer. The single-chip microcomputer can compare the collected output current value of the power output end of the driving power supply with the preset current value to know whether the output current value is within the preset current value range, thereby judging whether the driving power supply is abnormal. If the driving power supply is judged to be abnormal, a reset and restart signal can be output to the restart end of the driving power supply to reset and restart the driving power supply, and then the output current of the driving power supply is monitored again, and the above process is repeated.

[0091] In some embodiments, when the output current value is confirmed to be abnormal, the steps of outputting a reset restart instruction to the corresponding driving power supply to restart the driving power supply, and comparing the output current value of the restarted driving power supply with the preset current value include:

[0092] S521. When the output current value of the driving power supply after the restart is still abnormal, restart the driving power supply again according to the preset time interval; wherein the number of restarts is set to 3-5 times.

[0093] Specifically, in this embodiment, in order to avoid false alarms, when the output current is still abnormal after the driver power supply is restarted for the first time, the fault will not be reported immediately. Instead, after repeated restarts for several times, if the output current of the driver power supply is still abnormal, a fault signal will be output to the host computer to inform the staff that the driver power supply needs maintenance. In one implementation, the number of restarts for the driver power supply with abnormal output current is set to 3 times.

[0094] In other embodiments, Figure 3 As shown, the present invention also provides a train compartment lighting drive power supply failure control method, which includes the steps of:

[0095] S100, obtaining output current values ​​of at least two driving power supplies;

[0096] S200, when it is detected that the output current value is abnormal, restart the corresponding driving power supply, and further detect whether the output current value is abnormal;

[0097] S300: When the output current value is still abnormal after the drive power is restarted, a fault signal is output to the host computer;

[0098] S400, when it is detected that the output current value is normal, obtaining output voltage values ​​of at least two driving power supplies;

[0099] S500, when the output voltage value is abnormal, restart the corresponding driving power supply, and further detect whether the output voltage value is abnormal;

[0100] S600: When the output voltage value is still abnormal after the drive power is restarted, a fault signal is output to the host computer.

[0101] The difference from the previous embodiment (first detecting the output voltage and then detecting the output current) is that this embodiment first detects the output current value of the driving power supply, and when it is confirmed that the output current value is normal, the output voltage value of the driving power supply is detected. That is to say, when monitoring the driving power supply, you can first confirm that there is no problem with the output voltage of the driving power supply and then detect the output current, or you can first confirm that there is no problem with the output current of the driving power supply and then confirm the output voltage.

[0102] In some embodiments, Figure 4As shown, the present invention also provides a train compartment lighting driving power supply fault control circuit for implementing the train compartment lighting driving power supply fault control method as described above, which includes a first driving power supply 100, a second driving power supply 200, a first voltage sampling unit 300, a first current sampling unit 400, a second voltage sampling unit 500, a second current sampling unit 600, a reset restart unit 700 and a control unit 800. Among them, the first voltage sampling unit 300 is connected to the first driving power supply 100 and the control unit 800 respectively, and is used to collect the output voltage value of the first driving power supply 100; the first current sampling unit 400 is connected to the first driving power supply 100 and the control unit 800 respectively, and is used to collect the output current value of the first driving power supply 100; the second voltage sampling unit 500 is connected to the second driving power supply 200 and the control unit 800 respectively, and is used to collect the output voltage value of the second driving power supply 200; the second current sampling unit 600 is connected to the second driving power supply 200 and the control unit 800 respectively, and is used to collect the output current value of the second driving power supply 200; the reset restart unit 7 ... voltage value of the The restart unit 700 is respectively connected to the first driving power supply 100, the second driving power supply 200 and the control unit 800, and is used to control the first driving power supply 100 and the second driving power supply 200 to reset; the control unit 800 is used to confirm whether the first driving power supply 100 is abnormal according to the output voltage value collected by the first voltage sampling unit 300 and the output current value collected by the first current sampling unit 400, and to confirm whether the second driving power supply 200 is abnormal according to the output voltage value collected by the second voltage sampling unit 500 and the output current value collected by the second current sampling unit 600, and to output a reset and restart instruction to control the first driving power supply 100 and the second driving power supply 200 to restart.

[0103] Specifically, the control unit 800 may adopt a single-chip microcomputer MCU. The first driving power supply 100 and the second driving power supply 200 adopt a DC-DC unit, which can process the input voltage (Vin+, Vin-) and then output the voltage (Out+, Out-). The first driving power supply 100 and the second driving power supply 200 have redundant ports, and the power output ends of the two driving power supplies are connected together. When one of the driving power supplies fails, the other driving power supply can provide power. The first voltage sampling unit 300 and the first current sampling unit 400 respectively sample the output voltage value and the output current value of the first driving power supply 100, wherein the output current of the first driving power supply 100 is converted into a voltage by the first current sampling unit 400 and fed back to the control unit 800. The second voltage sampling unit 500 and the second current sampling unit 600 respectively collect the output voltage value and the output current value of the second driving power supply 200, wherein the output current of the second driving power supply 200 is converted into a voltage by the second current sampling unit 600 and fed back to the single-chip microcomputer. The reset and restart unit 700 is connected between the single chip microcomputer and the first driving power supply 100 and the second driving power supply 200. The single chip microcomputer can output a reset and restart signal and restart the first driving power supply 100 or the second driving power supply 200 through the reset and restart unit 700. The reset and restart signal can be a continuous high level signal, for example, a 5V level that lasts for 5 seconds.

[0104] In this way, the control unit 800 can monitor the output voltage value and output current value of the train car driving power supply in real time. When an abnormality is detected in the output voltage value or the output current value, the corresponding abnormal driving power supply can be restarted, thereby realizing real-time monitoring of the health status of the train car lighting system and self-repairing soft faults in real time. If the driving power supply is still in a faulty state after restarting, the fault code will be output to the host computer to facilitate the staff to deal with the driving power supply fault in time, thereby improving the safety and reliability of the train lighting system.

[0105] In some embodiments, Figure 4 and Figure 5As shown, the train compartment lighting driving power supply fault control circuit also includes: a first protection unit 900, a second protection unit 1000, a third protection unit 1100 and a fourth protection unit 1200. The first protection unit 900 is connected between the first voltage sampling unit 300 and the control unit 800 to prevent the control unit 800 from being damaged when the first driving power supply 100 is abnormal; the second protection unit 1000 is connected between the first current sampling unit 400 and the control unit 800 to prevent the control unit 800 from being damaged when the first driving power supply 100 is abnormal; the third protection unit 1100 is connected between the second voltage sampling unit 500 and the control unit 800 to prevent the control unit 800 from being damaged when the second driving power supply 200 is abnormal; the fourth protection unit 1200 is connected between the second current protection unit and the control unit 800 to prevent the control unit 800 from being damaged when the second driving power supply 200 is abnormal.

[0106] Specifically, the first voltage sampling unit 300 includes a first resistor R1 and a second resistor R2; the first current sampling unit 400 includes a third resistor R3; the second voltage sampling unit 500 includes a fourth resistor R4 and a fifth resistor R5; the second current sampling unit 600 includes a sixth resistor R6; the first protection unit 900 includes a seventh resistor R7 and a first voltage zener diode ZD1; the second protection unit 1000 includes an eighth resistor R8 and a second voltage zener diode ZD2; the third protection unit 1100 includes a ninth resistor R9 and a third voltage zener diode ZD3; the fourth protection unit 1100 includes a seventh resistor R7 and a first voltage zener diode ZD1; the second protection unit 1000 includes a eighth resistor R8 and a second voltage zener diode ZD2; the third protection unit 1100 includes a ninth resistor R9 and a third voltage zener diode ZD3; the fourth protection unit 1100 includes a seventh resistor R7 and a first voltage zener diode ZD1; the second protection unit 1000 includes a seventh resistor R7 and a first voltage zener diode ZD1 ... seventh resistor R7 and a first voltage zener diode ZD1; the fourth protection unit 1100 includes a seventh resistor R7 and a first voltage zener diode ZD1; the first protection unit 1100 includes a seventh resistor R7 and a first voltage zener diode ZD1; the first protection unit 1100 includes a seventh resistor R7 and a first voltage zener diode ZD1; the first protection unit 1100 includes a seventh resistor R7 and a first voltage zener diode ZD1; the first The unit 1200 includes a tenth resistor R10 and a fourth voltage-stabilizing diode ZD4; one end of the first resistor R1 is connected to the voltage output end of the first driving power supply 100, the other end of the first resistor R1 is connected to one end of the second resistor R2, and the other end of the second resistor R2 is grounded; the common end of the first resistor R1 and the second resistor R2 is connected to one end of the seventh resistor R7, the other end of the seventh resistor R7 is respectively connected to the cathode of the first voltage-stabilizing diode ZD1 and the control unit 800, and the anode of the first voltage-stabilizing diode ZD1 is grounded; the third resistor R3 One end of the fourth resistor R4 is connected to the voltage output end of the second driving power supply 200, and the other end of the fourth resistor R4 is connected to one end of the fifth resistor R5, and the other end of the fifth resistor R5 is grounded; the fourth resistor R4 is connected to ... 5 is connected to one end of the ninth resistor R9, the other end of the ninth resistor R9 is respectively connected to the cathode of the third voltage zener diode ZD3 and the control unit 800, and the anode of the third voltage zener diode ZD3 is grounded; one end of the sixth resistor R6 is respectively connected to the current output end of the second driving power supply 200 and one end of the tenth resistor R10, and the other end of the sixth resistor R6 is grounded; the other end of the tenth resistor R10 is respectively connected to the cathode of the fourth voltage zener diode ZD4 and the control unit 800, and the anode of the fourth voltage zener diode ZD4 is grounded.

[0107] The first resistor R1 and the second resistor R2 perform voltage division sampling on the output voltage of the first driving power supply 100. The seventh resistor R7 can limit the current of the sampled output voltage of the first driving power supply 100, and the first voltage stabilizing diode ZD1 can limit the voltage of the sampled voltage. After the collected output voltage is input into the single-chip microcomputer, it can prevent the first driving power supply 100 from causing damage to the single-chip microcomputer when it is abnormal. The voltage value required by the single-chip microcomputer is very low (generally within 5V), and the current value is very small (in the order of microamperes) to meet the requirements. Therefore, the first resistor R1 and the second resistor R2 use large resistor voltage division sampling, for example, a resistor of several hundred kilo-ohms can be used, which can ensure the accuracy of the sampling without affecting the normal output voltage. This direct sampling method effectively prevents signal distortion and has the advantages of real-time and dynamic sampling. If there is an abnormality in the output voltage, it can be reported to the corresponding fault code to the workbench in time, so as to facilitate timely maintenance and ensure safety.

[0108] The voltage value required by the single-chip microcomputer is very low (generally within 5V), and the current value is very small (in the order of microamperes) to meet the requirements. In order to detect the output current of the driving power supply in real time and dynamically, the third resistor uses a small resistor connected in series to the negative electrode of the first driving power supply 100, for example, a resistor of several milliohms can be used. The current value output by the first driving power supply 100 can be obtained from the voltage drop on the third resistor R3. The voltage of the third resistor R3 is directly input to the single-chip microcomputer, and the single-chip microcomputer performs calculations and comparisons. The small resistor can ensure the correctness of the sampling and will not affect the normal output current. The eighth resistor can limit the voltage converted by the third resistor R3 and then input it to the single-chip microcomputer. The second voltage regulator diode ZD2 can limit the converted voltage to prevent the first driving power supply 100 from causing damage to the single-chip microcomputer when it is abnormal.

[0109] The fourth resistor R4 and the fifth resistor R5 perform voltage division sampling on the output voltage of the second driving power supply 200. The ninth resistor R9 can limit the current of the sampled output voltage of the second driving power supply 200, and the third voltage stabilizing diode ZD3 can limit the voltage of the sampled voltage. After the sampled output voltage is input into the single-chip microcomputer, the second driving power supply 200 can be prevented from causing damage to the single-chip microcomputer when it is abnormal. Among them, the fourth resistor R4 and the fifth resistor R5 use large resistor voltage division sampling, for example, a resistor of several hundred kilo-ohms can be used, which can ensure the accuracy of sampling without affecting the normal output voltage. If there is an abnormality in the output voltage, the corresponding fault code can be reported to the workbench in time to facilitate timely maintenance and ensure safety. In order to detect the output current of the driving power supply in real time and dynamically, the sixth resistor R6 is connected in series with a small resistor at the negative electrode of the second driving power supply 200, for example, a resistor of several milliohms can be used. The current value output by the second driving power supply 200 can be obtained from the voltage drop on the sixth resistor R6. The voltage of the sixth resistor R6 is directly input to the single-chip microcomputer, which performs calculation and comparison. The small resistor can ensure the correctness of the sampling and will not affect the normal output current. The tenth resistor R10 can limit the current of the converted voltage of the sixth resistor R6 and then input it to the single-chip microcomputer. The fourth voltage stabilizing diode ZD4 can limit the converted voltage to prevent the second driving power supply 200 from causing damage to the single-chip microcomputer when it is abnormal.

[0110] In some embodiments, Figure 4 and Figure 5 As shown, the reset and restart unit 700 includes an eleventh resistor R11, a twelfth resistor R12, a first optocoupler OP1 and a second optocoupler OP2; wherein, one end of the eleventh resistor R11 is connected to the control unit 800, the other end of the eleventh resistor R11 is connected to the transmitting side OP1A of the first optocoupler OP1, and the receiving side OP1B of the first optocoupler OP1 is connected to the reset pin Restart of the first driving power supply 100; one end of the twelfth resistor R12 is connected to the control unit 800, the other end of the twelfth resistor R12 is connected to the transmitting side OP2A of the second optocoupler OP2, and the receiving side OP2B of the second optocoupler OP2 is connected to the reset pin Restart of the second driving power supply 200.

[0111] Specifically, when the single-chip microcomputer determines that the first driving power supply 100 is abnormal, a high level is output through the eleventh resistor R11 to the transmitting side OP1A of the first optocoupler OP1, the receiving side OP1B of the first optocoupler OP1 is turned on, and the reset pin of the first driving power supply 100 is reset and restarted (that is, the reset pin of the first driving power supply 100 is pulled low). Thereafter, the output current value and the output voltage value of the first driving power supply 100 are detected again. If they do not meet the requirements, a reset and restart signal is issued again, for a total of three times, each time with an interval of 5 seconds. If the restart fails for three times, the single-chip microcomputer reports a fault signal to the host computer. When the single-chip microcomputer determines that the second driving power supply 200 is abnormal, the single-chip microcomputer outputs a high level and outputs it to the transmitting side OP2A of the second optical coupler OP2 through the twelfth resistor R12, the receiving side OP2B of the second optical coupler OP2 is turned on, and the reset pin Restart of the second driving power supply 200 is reset and restarted. After that, the single-chip microcomputer detects the output current value and output voltage value of the first driving power supply 100 again. If they do not meet the requirements, the reset and restart signal is sent again, a total of three times, each time with an interval of 5 seconds. If the restart fails three times, the single-chip microcomputer reports a fault signal to the host computer. Because the driving power supply is the primary of the switching power supply, the reset and restart signal output by the single-chip microcomputer is controlled by optical coupling isolation, which can improve safety and reliability.

[0112] In some embodiments, the present invention further provides a lighting system, which includes the above-mentioned train compartment lighting driving power supply failure control circuit. Specifically, as described in a train compartment lighting driving power supply failure control circuit, it will not be repeated here.

[0113] In summary, the train compartment lighting drive power supply fault control method, circuit and lighting system provided by the present invention have the following beneficial effects:

[0114] By real-time monitoring of the output voltage and current of the train carriage drive power supply, when an abnormal output voltage or current is detected, the corresponding abnormal drive power supply can be restarted, so that the health of the train carriage lighting system can be monitored in real time, and soft faults can be repaired in real time. If the drive power supply is still in a faulty state after restarting, the fault code will be output to the host computer so that the staff can handle the drive power supply fault in time, thereby improving the safety and reliability of the train lighting system;

[0115] When a drive power abnormality is detected, the fault code will not be uploaded immediately. Instead, the fault code will be uploaded after multiple restarts to confirm the fault, thus avoiding false alarms.

[0116] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A train compartment lighting drive power supply fault control method, characterized in that: include: Obtain output voltage values ​​of at least two driving power supplies; When an abnormal output voltage value is detected, the corresponding driving power supply is restarted, and the output voltage value is further detected to see if it is abnormal; When the output voltage value is still abnormal after the drive power is restarted, a fault signal is output to the host computer; When it is detected that the output voltage value is normal, obtaining output current values ​​of at least two driving power supplies; When the output current value is abnormal, restart the corresponding driving power supply and further detect whether the output current value is abnormal; When the output current value is still abnormal after the drive power is restarted, a fault signal is output to the host computer.

2. The train compartment lighting drive power supply failure control method according to claim 1, characterized in that: When an abnormal output voltage value is detected, the corresponding driving power supply is restarted, and the step of further detecting whether the output voltage value is abnormal includes: The obtained output voltage value is compared with the preset voltage value, and when the output voltage value is inconsistent with the preset voltage value, it is confirmed that the output voltage value is abnormal; When it is confirmed that the output voltage value is abnormal, a reset and restart instruction is output to the corresponding driving power supply to restart the driving power supply, and the output voltage value of the restarted driving power supply is compared with the preset voltage value.

3. The train compartment lighting drive power supply failure control method according to claim 2, characterized in that: The step of outputting a reset and restart instruction to the corresponding driving power supply to restart the driving power supply when it is confirmed that the output voltage value is abnormal, and comparing the output voltage value of the driving power supply after the restart with the preset voltage value includes: When the output voltage value of the driving power supply after the restart is still abnormal, the driving power supply is restarted again according to the preset interval time; wherein the number of restarts is set to 3-5 times.

4. The train compartment lighting drive power supply failure control method according to claim 1, characterized in that: When the output current value is abnormal, the step of restarting the corresponding driving power supply and further detecting whether the output current value is abnormal includes: The obtained output current value is compared with the preset current value. When the output current value is inconsistent with the preset current value, it is confirmed that the output current value is abnormal; When it is confirmed that the output current value is abnormal, a reset and restart instruction is output to the corresponding driving power supply to restart the driving power supply, and the output current value of the driving power supply after the restart is compared with the preset current value.

5. The train compartment lighting drive power supply failure control method according to claim 4, characterized in that: The steps of outputting a reset and restart instruction to the corresponding driving power supply to restart the driving power supply after confirming that the output current value is abnormal, and comparing the output current value of the driving power supply after the restart with the preset current value include: When the output current value of the driving power supply after the restart is still abnormal, the driving power supply is restarted again according to the preset interval time; wherein the number of restarts is set to 3-5 times.

6. A train compartment lighting drive power supply fault control method, characterized in that: include: Obtain output current values ​​of at least two driving power supplies; When an abnormal output current value is detected, the corresponding driving power supply is restarted, and the output current value is further detected to see if it is abnormal; When the output current value is still abnormal after the drive power is restarted, a fault signal is output to the host computer; When it is detected that the output current value is normal, obtaining output voltage values ​​of at least two driving power supplies; When the output voltage value is abnormal, restart the corresponding driving power supply, and further detect whether the output voltage value is abnormal; When the output voltage value is still abnormal after the drive power is restarted, a fault signal is output to the host computer.

7. A train carriage lighting drive power supply failure control circuit for implementing the train carriage lighting drive power supply failure control method according to any one of claims 1 to 5, characterized in that: It includes a first driving power supply, a second driving power supply, a first voltage sampling unit, a first current sampling unit, a second voltage sampling unit, a second current sampling unit, a reset restart unit and a control unit; wherein, The first voltage sampling unit is connected to the first driving power supply and the control unit respectively, and is used to collect the output voltage value of the first driving power supply; The first current sampling unit is connected to the first driving power supply and the control unit respectively, and is used to collect the output current value of the first driving power supply; The second voltage sampling unit is connected to the second driving power supply and the control unit respectively, and is used to collect the output voltage value of the second driving power supply; The second current sampling unit is connected to the second driving power supply and the control unit respectively, and is used to collect the output current value of the second driving power supply; The reset and restart unit is connected to the first driving power supply, the second driving power supply and the control unit respectively, and is used to control the first driving power supply and the second driving power supply to reset; The control unit is used to confirm whether the first driving power supply is abnormal based on the output voltage value collected by the first voltage sampling unit and the output current value collected by the first current sampling unit, and to confirm whether the second driving power supply is abnormal based on the output voltage value collected by the second voltage sampling unit and the output current value collected by the second current sampling unit, and to output a reset and restart instruction to control the first driving power supply and the second driving power supply to restart.

8. The train compartment lighting drive power supply failure control circuit according to claim 7, characterized in that: Also includes: The first protection unit, the second protection unit, the third protection unit and the fourth protection unit; wherein, The first protection unit is connected between the first voltage sampling unit and the control unit, and is used to prevent the control unit from being damaged when the first driving power supply is abnormal; The second protection unit is connected between the first current sampling unit and the control unit, and is used to prevent the control unit from being damaged when the first driving power supply is abnormal; The third protection unit is connected between the second voltage sampling unit and the control unit, and is used to prevent the control unit from being damaged when the second driving power supply is abnormal; The fourth protection unit is connected between the second current sampling unit and the control unit, and is used to prevent the control unit from being damaged when the second driving power supply is abnormal.

9. The train compartment lighting drive power supply failure control circuit according to claim 8, characterized in that: The first voltage sampling unit includes a first resistor and a second resistor; the first current sampling unit includes a third resistor; the second voltage sampling unit includes a fourth resistor and a fifth resistor; the second current sampling unit includes a sixth resistor; the first protection unit includes a seventh resistor and a first voltage zener diode; the second protection unit includes an eighth resistor and a second voltage zener diode; the third protection unit includes a ninth resistor and a third voltage zener diode; the fourth protection unit includes a tenth resistor and a fourth voltage zener diode; One end of the first resistor is connected to the voltage output end of the first driving power supply, the other end of the first resistor is connected to one end of the second resistor, and the other end of the second resistor is grounded; The common end of the first resistor and the second resistor is connected to one end of the seventh resistor, the other end of the seventh resistor is respectively connected to the cathode of the first voltage zener diode and the control unit, and the anode of the first voltage zener diode is grounded; One end of the third resistor is respectively connected to the current output end of the first driving power supply and one end of the eighth resistor, the other end of the third resistor is grounded, the other end of the eighth resistor is respectively connected to the cathode of the second voltage zener diode and the control unit, and the anode of the second voltage zener diode is grounded; One end of the fourth resistor is connected to the voltage output end of the second driving power supply, the other end of the fourth resistor is connected to one end of the fifth resistor, and the other end of the fifth resistor is grounded; the common end of the fourth resistor and the fifth resistor is connected to one end of the ninth resistor, the other end of the ninth resistor is respectively connected to the cathode of the third voltage zener diode and the control unit, and the anode of the third voltage zener diode is grounded; One end of the sixth resistor is connected to the current output end of the second driving power supply and one end of the tenth resistor respectively, and the other end of the sixth resistor is grounded; the other end of the tenth resistor is connected to the cathode of the fourth voltage zener diode and the control unit respectively, and the anode of the fourth voltage zener diode is grounded; The reset and restart unit includes an eleventh resistor, a twelfth resistor, a first optocoupler and a second optocoupler; wherein, one end of the eleventh resistor is connected to the control unit, the other end of the eleventh resistor is connected to the transmitting side of the first optocoupler, and the receiving side of the first optocoupler is connected to the reset pin of the first driving power supply; one end of the twelfth resistor is connected to the control unit, the other end of the twelfth resistor is connected to the transmitting side of the second optocoupler, and the receiving side of the second optocoupler is connected to the reset pin of the second driving power supply.

10. A lighting system, characterized in that: It comprises a train carriage lighting drive power supply fault control circuit as described in any one of claims 7 to 9.

Images