Fire detection method and apparatus for rail vehicle traction converter cabinet, and device and medium

Abstract

A fire detection method and apparatus for a rail vehicle traction converter cabinet, and a device and a medium, which can further improve the accuracy and reliability of fire detection for the rail vehicle traction converter cabinet. The method comprises: on the basis of the current operating state of a traction converter cabinet in a rail vehicle, setting a temperature threshold value at which an IGBT inverter module can operate safely, and using a DCU to monitor the temperature value of the IGBT inverter module at the current moment, so as to obtain a target temperature value (S11); if the target temperature value is greater than the temperature threshold value, receiving a first early warning signal triggered by the DCU (S12); if a stranded wire, which is connected to a low-level signal, in a thermo-sensing cable in the traction converter cabinet outputs a high-level signal, triggering a second early warning signal (S13), wherein two stranded wires in the thermo-sensing cable are respectively connected to the high-level signal and the low-level signal; and if the time interval between the first early warning signal and the second early warning signal does not exceed a preset time interval, determining that a fire has occurred in the traction converter cabinet (S14).

Description

A fire detection method, device, equipment and medium for a rail vehicle traction box

[0001] This application claims priority to a Chinese patent application filed with the Patent Office of China on February 27, 2024, with application number 202410213515.3 and invention name “A fire detection method, device, equipment and medium for a rail vehicle traction box”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present invention relates to the technical field of rail vehicles, and in particular to a fire detection method, device, equipment and medium for a traction box of a rail vehicle. Background Art

[0003] The fire protection design of rail vehicles has always been a focus of safety research. In the prior art, when performing fire detection on the traction box of a rail vehicle, a temperature sensing cable is usually installed in the traction box and used to determine whether a fire has occurred in the traction box.

[0004] Because the temperature-sensing cable is a twisted-pair structure, when using it to detect fires in a traction box, the two twisted wires in the temperature-sensing cable are connected to a high-level signal and a low-level signal, respectively. If the traction box is not on fire, the insulation between the two twisted wires in the temperature-sensing cable is not burned, and the twisted wire connected to the low-level signal will continue to output a low-level signal. If a fire occurs in the traction box, the insulation between the two twisted wires in the temperature-sensing cable will fall off due to the high temperature. This will cause the two twisted wires in the temperature-sensing cable to connect together, causing the twisted wire that should output a low-level signal to output a high-level signal. This property of the temperature-sensing cable can be used to determine whether a fire has occurred in the traction box.

[0005] However, during the actual operation of the traction box, crosstalk may occur between the two strands of the temperature-sensing cable. In this case, the stranded wire in the temperature-sensing cable that should output a low-level signal will also output a high-level signal. This can cause the traction box to misjudge the fire detection results, resulting in inaccurate and unreliable fire detection results. Currently, there is no effective solution to this technical problem.

[0006] Therefore, it can be seen that how to further improve the accuracy and reliability of fire detection in rail vehicle traction boxes is a technical problem that needs to be solved urgently by those skilled in the art.

[0007] Summary of the Invention

[0008] In view of this, the purpose of the present invention is to provide a method, device, equipment and medium for detecting fire in a traction box of a railway vehicle, so as to solve the technical problem in the prior art of inaccurate and unreliable detection results when performing fire detection on a traction box. The specific solution is as follows:

[0009] In order to solve the above technical problems, the present invention provides a fire detection method for a rail vehicle traction box, which is applied to the TCMS of a rail vehicle, comprising:

[0010] Setting a temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle, and using the DCU to monitor the temperature value of the IGBT inverter module at the current moment to obtain a target temperature value;

[0011] If the target temperature value is greater than the temperature threshold, receiving a first warning signal triggered by the DCU;

[0012] If the twisted wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal, a second warning signal is triggered; wherein the two twisted wires in the temperature-sensing cable are connected to the high-level signal and the low-level signal respectively;

[0013] If the time interval between the first warning signal and the second warning signal does not exceed the preset time interval, it is determined that a fire occurs in the traction box.

[0014] Preferably, the process of setting the temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle includes:

[0015] Determining a temperature value corresponding to the traction box under a current operating condition to obtain a first temperature value;

[0016] detecting a temperature value of an outer surface of the traction box to obtain a second temperature value;

[0017] The temperature threshold is set according to the first temperature value, the second temperature value, and a temperature compensation value.

[0018] Preferably, the process of determining the temperature value corresponding to the traction box under the current operating condition to obtain the first temperature value includes:

[0019] Acquiring historical temperature data of the traction box under various operating conditions, and establishing a mapping relationship between corresponding temperature values ​​of the traction box under different operating conditions based on the historical temperature data;

[0020] The temperature value corresponding to the IGBT inverter module under the current operating condition is determined according to the mapping relationship to obtain the first temperature value.

[0021] Preferably, the process of setting the temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle includes:

[0022] The current operating condition of the traction box is determined according to the real-time voltage value and the real-time current value of the traction box, and the temperature threshold at which the IGBT inverter module can operate safely is set according to the current operating condition of the traction box.

[0023] Preferably, the process of receiving the first warning signal triggered by the DCU if the target temperature value is greater than the temperature threshold includes:

[0024] If the target temperature value is greater than the temperature threshold, the IGBT inverter module is turned off by using the DCU, and the first warning signal triggered by the DCU is received.

[0025] Preferably, the process of triggering the second warning signal if the stranded wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal includes:

[0026] Pre-connecting the two temperature-sensing cables in parallel in the traction box;

[0027] If the twisted wires connected to the low-level signal in the two temperature-sensing cables in the traction box both output high-level signals, the second warning signal is triggered.

[0028] Preferably, after determining that the traction box has a fire, the process further includes:

[0029] A fire alarm signal is issued and sent to the HMI in the driver's cab of the rail vehicle, or the fire alarm signal is sent to the OCC of the rail vehicle, so that operation and maintenance personnel respond to the fire alarm signal.

[0030] In order to solve the above technical problems, the present invention further provides a fire detection device for a rail vehicle traction box, which is applied to the TCMS of a rail vehicle, comprising:

[0031] a temperature comparison module, configured to set a temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle, and to monitor the temperature value of the IGBT inverter module at the current moment using the DCU to obtain a target temperature value;

[0032] a first triggering module, configured to receive a first warning signal triggered by the DCU if the target temperature value is greater than the temperature threshold;

[0033] A second trigger module is configured to trigger a second warning signal if the twisted wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal; wherein the two twisted wires in the temperature-sensing cable are connected to the high-level signal and the low-level signal respectively;

[0034] The fire determination module is configured to determine that a fire has occurred in the traction box if the time interval between the first warning signal and the second warning signal does not exceed a preset time interval.

[0035] In order to solve the above technical problems, the present invention further provides an electronic device, comprising:

[0036] memory for storing computer programs;

[0037] The processor is configured to implement the steps of the aforementioned method for detecting fire in a traction box of a railway vehicle when executing the computer program.

[0038] In order to solve the above technical problems, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the fire detection method for a railway vehicle traction box as disclosed above are implemented.

[0039] Beneficial Effects: In the present invention, to detect whether a fire has occurred in a traction box within a rail vehicle, the TCMS of the rail vehicle first sets a temperature threshold for safe operation of the IGBT inverter module based on the current operating conditions of the traction box within the rail vehicle. It then uses the DCU to monitor the current temperature of the IGBT inverter module to obtain a target temperature. Since the IGBT inverter module is a core component within the traction box, fires in traction boxes are often caused by the high-frequency operation of the switching transistors within the IGBT inverter module. Therefore, when the target temperature exceeds the temperature threshold, it indicates that the IGBT inverter module is likely to have overheated and ignited. Furthermore, if the stranded wire connected to the low-level signal in the temperature sensing circuit within the traction box outputs a high-level signal, it indicates that the insulation between the two stranded wires in the temperature sensing cable has detached due to the high temperature, connecting them together and causing the stranded wire in the temperature sensing cable, which should have output a low-level signal, to output a high-level signal. At this point, the TCMS triggers a second warning signal. If the time interval between the first and second warning signals does not exceed the preset time interval, it indicates that the above judgment conditions meet the fire characteristics of a traction box fire, and the traction box fire is determined to have occurred. Compared to the prior art method of using only a single temperature-sensing cable to determine whether a traction box fire has occurred, this method can avoid misjudgments when detecting fires in the traction box, thereby further improving the accuracy and reliability of fire detection in rail vehicle traction boxes. Accordingly, the fire detection device, equipment, and medium for rail vehicle traction boxes provided by the present invention also have the aforementioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0041] FIG1 is a flow chart of a fire detection method for a rail vehicle traction box provided by an embodiment of the present invention;

[0042] FIG2 is a diagram showing the internal structure of a rail vehicle provided by an embodiment of the present invention;

[0043] FIG3 is a schematic diagram showing a method for setting a temperature threshold at which an IGBT inverter module can safely operate according to a first temperature value, a second temperature value, and a temperature compensation value;

[0044] FIG4 is a structural diagram of a fire detection device for a rail vehicle traction box provided by an embodiment of the present invention;

[0045] FIG5 is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] Please refer to FIG1 , which is a flow chart of a fire detection method for a rail vehicle traction box provided by an embodiment of the present invention. The method includes:

[0048] Step S11: setting a temperature threshold at which the IGBT inverter module can operate safely according to the current operating condition of the traction box in the rail vehicle, and using the DCU to monitor the temperature value of the IGBT inverter module at the current moment to obtain a target temperature value;

[0049] Step S12: If the target temperature value is greater than the temperature threshold, receiving a first warning signal triggered by the DCU;

[0050] Step S13: If the twisted wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal, a second warning signal is triggered; wherein the two twisted wires in the temperature-sensing cable are connected to the high-level signal and the low-level signal respectively;

[0051] Step S14: If the time interval between the first warning signal and the second warning signal does not exceed the preset time interval, it is determined that a fire occurs in the traction box.

[0052] This embodiment provides a method for detecting fires in a rail vehicle traction box. This method can further improve the accuracy and reliability of fire detection in rail vehicle traction boxes. The method is specifically described using the TCMS (Train Control and Management System) in a rail vehicle as the execution entity.

[0053] Please refer to Figure 2, which is a diagram of the internal structure of a rail vehicle provided by an embodiment of the present invention. In Figure 2, 101 represents the TCMS in the rail vehicle, 102 represents the traction system in the rail vehicle, 103 represents the traction box, 104 represents the DCU (Drive Control Unit), and 105 represents the IGBT (Insulated Gate Bipolar Transistor) inverter module.

[0054] In this method, the TCMS first sets the temperature threshold at which the IGBT inverter module can safely operate based on the current operating conditions of the traction box in the rail vehicle. It is understandable that because the IGBT inverter module is the core component of the traction box, most fires in the traction box are caused by the high-frequency operation of the switching tube within the IGBT inverter module. Therefore, in this embodiment, the operating status of the traction box can be inferred by the temperature value of the IGBT inverter module. Since the temperature value of the IGBT inverter module is strongly correlated with the operating conditions of the traction box, the temperature threshold at which the IGBT inverter module can safely operate can be set based on the current operating conditions of the traction box in the rail vehicle.

[0055] Then, the DCU is used to monitor the temperature value of the IGBT inverter module at the current moment to obtain the target temperature value. If the target temperature value is greater than the temperature threshold, it means that the IGBT inverter module is already in an over-temperature state at the current moment and cannot operate safely. At this time, the DCU will send the first warning signal to the TCMS.

[0056] Because the traction box is pre-installed with a temperature sensing cable, and the two twisted wires in the temperature sensing cable are respectively connected to the high-level signal and the low-level signal, the temperature sensing cable in the traction box can be used to determine whether the traction box is in an abnormal state.

[0057] Specifically, if the stranded wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal, it means that the insulation layer between the two stranded wires in the temperature-sensing cable has fallen off due to high temperature and connected together, causing the stranded wire in the temperature-sensing cable that should have output a low-level signal to output a high-level signal. At this time, TCMS will trigger the second warning signal.

[0058] Among them, the number of temperature-sensing cables in the traction box can be either one or multiple. The twisted wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal. This can be either one twisted wire connected to the low-level signal in one temperature-sensing cable outputting a high-level signal, or multiple twisted wires connected to the low-level signal in multiple temperature-sensing cables outputting a high-level signal, or multiple twisted wires connected to the low-level signal in multiple temperature-sensing cables outputting more than one high-level signal. In other words, as long as the twisted wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal, the TCMS will trigger the second warning signal.

[0059] In actual applications, the temperature of an IGBT inverter module fire is lower than that of a temperature-sensing cable fire. Therefore, the DCU triggers the first warning signal earlier than the TCMS triggers the second warning signal. In other words, there is a certain time interval between the first and second warning signals. Furthermore, because the DCU triggers the first warning signal earlier than the TCMS triggers the second warning signal, this method can effectively detect abnormal conditions in the traction box at the early stage of a fire, effectively reducing the scale of the fire or the probability of a fire in the traction box.

[0060] If the time interval between the first and second warning signals does not exceed the preset time interval, it indicates that the above judgment conditions meet the fire characteristics of the traction box fire, and the TCMS can then determine that a fire has occurred in the traction box. If the time interval between the first and second warning signals exceeds the preset time interval, or in actual application, the DCU only triggers the first warning signal, or the TCMS only triggers the second warning signal, it indicates that the traction box is in an abnormal state at the current moment. At this time, the TCMS can prompt an abnormal alarm signal, allowing operation and maintenance personnel to troubleshoot and repair the traction box, thereby avoiding the occurrence of safety accidents.

[0061] It should be noted that, in actual applications, in order to make the fire detection method provided in this application more practical and have better fire detection effect, the preset time interval needs to be adjusted according to the actual operation conditions of the rail vehicle, which will not be described in detail here.

[0062] Obviously, compared with the prior art of using only one temperature-sensing cable to determine whether a fire has occurred in the traction box, the method provided in this embodiment can avoid misjudgment when performing fire detection on the traction box, thereby further improving the accuracy and reliability of fire detection on the traction box of a rail vehicle.

[0063] In this embodiment, to detect a fire in a traction box within a rail vehicle, the TCMS first sets a temperature threshold for safe operation of the IGBT inverter module based on the current operating conditions of the traction box. The TCMS then uses the DCU to monitor the current temperature of the IGBT inverter module to obtain a target temperature. Since the IGBT inverter module is a core component within the traction box, fires in traction boxes are often caused by the high-frequency operation of the switching transistors within the IGBT inverter module. Therefore, when the target temperature exceeds the temperature threshold, it indicates that the IGBT inverter module is likely to have overheated and ignited. Furthermore, if the stranded wire connected to the low-level signal in the traction box's temperature sensing circuit outputs a high-level signal, it indicates that the insulation between the two stranded wires in the temperature sensing cable has detached due to high temperature, connecting them together and causing the stranded wire in the temperature sensing cable, which should have output a low-level signal, to output a high-level signal. In this case, the TCMS triggers a second warning signal. If the interval between the first and second warning signals does not exceed the preset interval, it indicates that the aforementioned criteria meet the fire characteristics of a traction box fire, and a fire is determined to have occurred in the traction box. Compared with the existing technology of using only one temperature-sensing cable to determine whether a fire occurs in the traction box, this method can avoid misjudgment when performing fire detection on the traction box, thereby further improving the accuracy and reliability of fire detection on the traction box of a rail vehicle.

[0064] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation, the above step of setting the temperature threshold at which the IGBT inverter module can safely operate according to the current operating conditions of the traction box in the rail vehicle includes:

[0065] Determining a temperature value corresponding to the traction box under the current operating condition to obtain a first temperature value;

[0066] detecting a temperature value of an outer surface of the traction box to obtain a second temperature value;

[0067] A temperature threshold is set according to the first temperature value, the second temperature value, and the temperature compensation value.

[0068] It is understandable that when setting the temperature threshold for safe operation of the IGBT inverter module based on the current operating conditions of the traction box in a rail vehicle, although the operating temperature of the IGBT inverter is strongly correlated with the current operating conditions of the traction box, the temperature of the traction box's outer surface will also affect the operating state of the IGBT inverter module. For example, the operating state of the traction box in a low ambient temperature scenario is undoubtedly safer and more stable than the operating state of the traction box in a high ambient temperature scenario.

[0069] Therefore, in practical applications, to make the temperature threshold setting more accurate and reliable, the temperature threshold at which the IGBT inverter module can safely operate can also be set based on the temperature of the traction box under current operating conditions and the temperature of the traction box's outer surface. Furthermore, to reduce the false positive rate of fires, a temperature compensation value can be set based on manual experience to correct the temperature threshold, making the required temperature threshold more reliable.

[0070] Specifically, when setting the temperature threshold at which the IGBT inverter module can operate safely according to the current operating condition of the traction box, the first step is to determine the temperature value corresponding to the traction box under the current operating condition to obtain a first temperature value; then, the temperature value of the outer surface of the traction box is detected to obtain a second temperature value; finally, the temperature threshold at which the IGBT inverter module can operate safely is set based on the first temperature value, the second temperature value and the temperature compensation value.

[0071] Please refer to Figure 3, which shows the principle diagram for setting the temperature threshold for safe operation of the IGBT inverter module based on the first temperature value, the second temperature value, and the temperature compensation value. In Figure 3, T represents the temperature threshold, t1 represents the first temperature value, t2 represents the second temperature value, and t3 represents the temperature compensation value. For example, if the temperature value t1 corresponding to the traction box under the current operating conditions is 150°C, the temperature value t2 of the traction box outer surface is 40°C, and the temperature compensation value t3 is 10°C, then the temperature threshold T is 200°C.

[0072] Obviously, the technical solution provided by this embodiment can make the setting value of the temperature threshold more accurate and reliable.

[0073] As a preferred embodiment, the above step of determining the temperature value corresponding to the traction box under the current operating condition to obtain the first temperature value includes:

[0074] Obtain historical temperature data of the traction box under various operating conditions, and establish a mapping relationship between the temperature values ​​corresponding to the traction box under different operating conditions based on the historical temperature data;

[0075] The temperature value corresponding to the IGBT inverter module under the current operating condition is determined according to the mapping relationship to obtain a first temperature value.

[0076] In this embodiment, in order to determine the temperature value corresponding to the traction box under the current operating conditions, it is necessary to obtain the historical temperature data of the traction box under various operating conditions in advance, and establish a mapping relationship between the temperature values ​​corresponding to the traction box under different operating conditions based on the historical temperature data. This operation is equivalent to creating a mutual correspondence between the traction box under different operating conditions and its corresponding temperature values.

[0077] It can be understood that as an automatic control device, the temperature value corresponding to the traction box under different operating conditions is basically fixed. Therefore, based on the created mapping relationship, the temperature value corresponding to the IGBT inverter module under the current operating conditions can be determined to obtain the first temperature value.

[0078] It should be noted that the various operating conditions of the traction box include: constant force operating condition, constant power operating condition, natural characteristic operating condition, inertia operating condition, emergency braking operating condition, rapid braking operating condition, etc.

[0079] Obviously, through the technical solution provided by this embodiment, the temperature value corresponding to the traction box under the current operating condition can be accurately calculated.

[0080] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation, the above step of setting the temperature threshold at which the IGBT inverter module can safely operate according to the current operating conditions of the traction box in the rail vehicle includes:

[0081] The current operating condition of the traction box is determined according to the real-time voltage value and the real-time current value of the traction box, and the temperature threshold at which the IGBT inverter module can operate safely is set according to the current operating condition of the traction box.

[0082] It can be understood that the operating condition of the traction box is mainly determined by the voltage and current values ​​of the traction box. Therefore, in practical applications, a voltage sensor can be used to detect the real-time voltage value of the traction box, and a current sensor can be used to detect the real-time current value of the traction box. Then, the current operating condition of the traction box can be determined by the real-time voltage and real-time current values ​​of the traction box.

[0083] When the current operating condition of the traction box is determined, the temperature threshold at which the IGBT inverter module can operate safely can be set according to the current operating condition of the traction box. For this part, please refer to the relevant description of the above embodiment and will not be described in detail here.

[0084] Obviously, through the technical solution provided by this embodiment, the current operating condition of the traction box can be accurately determined.

[0085] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation, the above step: if the target temperature value is greater than the temperature threshold, the process of receiving the first warning signal triggered by the DCU includes:

[0086] If the target temperature value is greater than the temperature threshold, the DCU is used to shut down the IGBT inverter module, and a first warning signal triggered by the DCU is received.

[0087] In this embodiment, if the target temperature is greater than the temperature threshold, it indicates that the current temperature of the traction box in the rail vehicle has exceeded the maximum range within which the traction box can safely operate, and there is a high probability that a fire has occurred in the traction box. In this case, to reduce the probability of a safety accident, the DCU can autonomously shut down the IGBT inverter module and quickly reduce the temperature of the IGBT inverter module.

[0088] When the DCU turns off the IGBT inverter module, it also needs to send a first warning signal to the TCMS so that the TCMS can promptly know the real-time operating status of the traction box in the rail vehicle and make subsequent judgments and processing.

[0089] Obviously, the technical solution provided by this embodiment can further ensure the safety of rail vehicles during operation.

[0090] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation method, the above step: if the stranded wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal, the process of triggering the second warning signal includes:

[0091] Pre-connect two temperature-sensing cables in parallel in the traction box;

[0092] If the twisted wires connected to the low-level signal in the two temperature-sensing cables in the traction box both output high-level signals, the second early warning signal is triggered.

[0093] In this embodiment, in order to reduce the misjudgment rate of the temperature-sensing cable for fire in the traction box and reduce the wiring complexity in the traction box, two temperature-sensing cables can be pre-connected in parallel in the traction box, and these two temperature-sensing cables can be used to monitor the abnormal status of the traction box.

[0094] Specifically, if the twisted wires connected to the low-level signals in the two temperature-sensing cables in the traction box both output high-level signals, it means that the insulation layer between the twisted wires in the two temperature-sensing cables has fallen off due to high temperature. It is likely that a fire has occurred in the traction box. At this time, TCMS will trigger the second warning signal.

[0095] It is conceivable that using two temperature-sensing cables to monitor abnormal conditions in the traction box can reduce the misjudgment rate when using a single temperature-sensing cable to monitor abnormal conditions in the traction box, thereby making the second warning signal triggered by the temperature-sensing cable more credible and reliable. On this basis, the fire diagnosis result of the traction box can be made more accurate and reliable.

[0096] Obviously, the technical solution provided by this embodiment can further improve the accuracy of fire detection on rail vehicle traction boxes.

[0097] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation, the above step of determining that a fire has occurred in the traction box further includes:

[0098] A fire alarm signal is issued and sent to the HMI in the driver's cab of the rail vehicle, or the fire alarm signal is sent to the OCC of the rail vehicle so that the operation and maintenance personnel can respond to the fire alarm signal.

[0099] In this embodiment, when the TCMS determines that a fire has occurred in the traction box, the TCMS will issue a fire alarm signal. Furthermore, if the rail vehicle is operated by a train driver in the driver's cab, the TCMS will send the fire alarm signal to the HMI (Human Machine Interface) in the rail vehicle driver's cab, so that the train driver can promptly be informed of the fire in the traction box of the rail vehicle. If the rail vehicle is a fully automated driving vehicle, the TCMS will send the fire alarm signal to the rail vehicle's OCC (Operating Control Center), so that the OCC can promptly be informed of the fire in the traction box of the rail vehicle.

[0100] It is conceivable that when the train driver learns of a fire in the traction box through the HMI, or when the OCC in the rail vehicle learns of a fire in the traction box, the train driver and the OCC can notify the operation and maintenance personnel to respond to the fire alarm signal, further reducing the probability of safety accidents and minimizing property losses.

[0101] Obviously, the technical solution provided by this embodiment can further ensure the safety and reliability of rail vehicles during operation.

[0102] Please refer to FIG4 , which is a structural diagram of a fire detection device for a rail vehicle traction box provided by an embodiment of the present invention. The device includes:

[0103] The temperature comparison module 21 is used to set a temperature threshold at which the IGBT inverter module can operate safely according to the current operating condition of the traction box in the rail vehicle, and to monitor the temperature value of the IGBT inverter module at the current moment using the DCU to obtain a target temperature value;

[0104] a first triggering module 22, configured to receive a first warning signal triggered by the DCU if the target temperature value is greater than the temperature threshold;

[0105] A second trigger module 23 is configured to trigger a second warning signal if the stranded wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal; wherein the two stranded wires in the temperature-sensing cable are connected to the high-level signal and the low-level signal respectively;

[0106] The fire determination module 24 is configured to determine that a fire has occurred in the traction box if the time interval between the first warning signal and the second warning signal does not exceed a preset time interval.

[0107] Preferably, the temperature comparison module 21 includes:

[0108] a temperature acquisition submodule, configured to determine a temperature value corresponding to the traction box under a current operating condition, and obtain a first temperature value;

[0109] a temperature detection submodule, configured to detect a temperature value of an outer surface of the traction box to obtain a second temperature value;

[0110] The temperature setting submodule is configured to set the temperature threshold according to the first temperature value, the second temperature value, and a temperature compensation value.

[0111] Preferably, the temperature acquisition submodule includes:

[0112] a relationship establishing unit, configured to obtain historical temperature data of the traction box under various operating conditions, and establish a mapping relationship between corresponding temperature values ​​of the traction box under different operating conditions based on the historical temperature data;

[0113] The temperature acquisition unit is used to determine the temperature value corresponding to the IGBT inverter module under the current operating condition according to the mapping relationship to obtain the first temperature value.

[0114] Preferably, the temperature comparison module includes:

[0115] The operating condition determination submodule is used to determine the current operating condition of the traction box according to the real-time voltage value and real-time current value of the traction box, and to set the temperature threshold at which the IGBT inverter module can operate safely according to the current operating condition of the traction box.

[0116] Preferably, the first trigger module 22 includes:

[0117] A signal triggering submodule is used to use the DCU to shut down the IGBT inverter module if the target temperature value is greater than the temperature threshold, and receive the first warning signal triggered by the DCU.

[0118] Preferably, the second trigger module 23 includes:

[0119] A cable setting submodule, used for pre-connecting two temperature-sensing cables in parallel in the traction box;

[0120] The early warning trigger submodule is used to trigger the second early warning signal if the twisted wires connected to the low-level signal in the two temperature-sensing cables in the traction box both output high-level signals.

[0121] Preferably, it also includes:

[0122] The response processing module is used to issue a fire alarm signal after determining that a fire has occurred in the traction box, and send the fire alarm signal to the HMI in the driver's cab of the rail vehicle, or send the fire alarm signal to the OCC of the rail vehicle, so that the operation and maintenance personnel can respond to the fire alarm signal.

[0123] A fire detection device for a rail vehicle traction box provided by an embodiment of the present invention has the beneficial effects of the fire detection method for a rail vehicle traction box disclosed above.

[0124] Please refer to FIG5 , which is a structural diagram of an electronic device provided by an embodiment of the present invention. The device includes:

[0125] Memory 31, for storing computer programs;

[0126] The processor 32 is configured to implement the steps of the aforementioned method for detecting fire in a traction box of a railway vehicle when executing the computer program.

[0127] An electronic device provided by an embodiment of the present invention has the beneficial effects of the aforementioned fire detection method for a rail vehicle traction box.

[0128] Accordingly, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the fire detection method for a rail vehicle traction box as disclosed above are implemented.

[0129] A computer-readable storage medium provided by an embodiment of the present invention has the beneficial effects of the aforementioned fire detection method for a rail vehicle traction box.

[0130] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from the other embodiments. Reference can be made to the descriptions of the identical or similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and the relevant parts can be referred to the descriptions of the methods.

[0131] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0132] The above is a detailed introduction to the fire detection method, device, equipment and medium for a rail vehicle traction box provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A fire detection method for a rail vehicle traction box, characterized in that: TCMS used in rail vehicles includes: Setting a temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle, and using the DCU to monitor the temperature value of the IGBT inverter module at the current moment to obtain a target temperature value; If the target temperature value is greater than the temperature threshold, receiving a first warning signal triggered by the DCU; If the twisted wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal, a second warning signal is triggered; wherein the two twisted wires in the temperature-sensing cable are connected to the high-level signal and the low-level signal respectively; If the time interval between the first warning signal and the second warning signal does not exceed the preset time interval, it is determined that a fire occurs in the traction box.

2. A fire detection method for a rail vehicle traction box according to claim 1, characterized in that: The process of setting the temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle includes: Determining a temperature value corresponding to the traction box under a current operating condition to obtain a first temperature value; detecting a temperature value of an outer surface of the traction box to obtain a second temperature value; The temperature threshold is set according to the first temperature value, the second temperature value, and a temperature compensation value.

3. The fire detection method for a rail vehicle traction box according to claim 2, characterized in that: The process of determining the temperature value corresponding to the traction box under the current operating condition to obtain the first temperature value includes: Acquiring historical temperature data of the traction box under various operating conditions, and establishing a mapping relationship between corresponding temperature values ​​of the traction box under different operating conditions based on the historical temperature data; The temperature value corresponding to the IGBT inverter module under the current operating condition is determined according to the mapping relationship to obtain the first temperature value.

4. The fire detection method for a rail vehicle traction box according to claim 1, characterized in that: The process of setting the temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle includes: The current operating condition of the traction box is determined according to the real-time voltage value and the real-time current value of the traction box, and the temperature threshold at which the IGBT inverter module can operate safely is set according to the current operating condition of the traction box.

5. The fire detection method for a rail vehicle traction box according to claim 1, characterized in that: The process of receiving the first warning signal triggered by the DCU if the target temperature value is greater than the temperature threshold includes: If the target temperature value is greater than the temperature threshold, the IGBT inverter module is turned off by using the DCU, and the first warning signal triggered by the DCU is received.

6. The fire detection method for a rail vehicle traction box according to claim 1, characterized in that: The process of triggering the second warning signal if the stranded wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal includes: Pre-connecting the two temperature-sensing cables in parallel in the traction box; If the twisted wires connected to the low-level signal in the two temperature-sensing cables in the traction box both output high-level signals, the second warning signal is triggered.

7. A fire detection method for a rail vehicle traction box according to any one of claims 1 to 6, characterized in that: After determining that the traction box is on fire, the process further includes: A fire alarm signal is issued and sent to the HMI in the driver's cab of the rail vehicle, or the fire alarm signal is sent to the OCC of the rail vehicle, so that operation and maintenance personnel respond to and process the fire alarm signal.

8. A fire detection device for a rail vehicle traction box, characterized in that: TCMS used in rail vehicles includes: a temperature comparison module, configured to set a temperature threshold at which the IGBT inverter module can safely operate according to the current operating condition of the traction box in the rail vehicle, and to monitor the temperature value of the IGBT inverter module at the current moment using the DCU to obtain a target temperature value; a first triggering module, configured to receive a first warning signal triggered by the DCU if the target temperature value is greater than the temperature threshold; A second trigger module is configured to trigger a second warning signal if the twisted wire connected to the low-level signal in the temperature-sensing cable in the traction box outputs a high-level signal; wherein the two twisted wires in the temperature-sensing cable are connected to the high-level signal and the low-level signal respectively; The fire determination module is configured to determine that a fire has occurred in the traction box if the time interval between the first warning signal and the second warning signal does not exceed a preset time interval.

9. An electronic device, characterized in that: include: memory for storing computer programs; A processor is configured to implement the steps of a fire detection method for a railway vehicle traction box as claimed in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the fire detection method for a rail vehicle traction box according to any one of claims 1 to 7 are implemented.

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