Abnormal processing method for train grounding carbon brush, axle temperature detection system and train

Abstract

The present disclosure provides a method for handling abnormalities in train grounding carbon brushes, which can be applied to the field of train grounding technology. The method includes: using the register of the acquisition chip to detect the working voltage signal of the acquisition chip; generating a fault register record value when it is detected that the working voltage signal of the acquisition chip reaches the grounding carbon brush fault condition, wherein the grounding carbon brush fault condition is determined according to the normal voltage range when the working voltage signal of the acquisition chip exceeds the normal voltage range due to the abnormality of the grounding carbon brush; obtaining the duration of the existence of the fault register record value when the temperature acquisition host recognizes the fault register record value; generating a prompt message indicating the abnormality of the grounding carbon brush when the duration of the existence of the fault register record value reaches a predetermined duration; and processing the abnormal grounding carbon brush based on the prompt message. The present disclosure also provides an axle temperature detection system and a train.

Description

Technical Field

[0001] The present disclosure relates to the technical field of train grounding, and in particular to an abnormality handling method for a train grounding carbon brush, an axle temperature detection system, and a train. Background Art

[0002] Train bogies are typically equipped with grounding carbon brushes, which quickly dissipate induced current to prevent interference with other onboard equipment. To ensure safe operation, these brushes must be inspected for anomalies and replaced accordingly. Currently, manual inspection is often used to determine if the brushes are abnormal. This increases the workload and reduces the efficiency of anomaly detection. Summary of the Invention

[0003] In view of the above problems, the present disclosure provides an abnormality handling method for train grounding carbon brushes, an axle temperature detection system and a train, which improve the abnormality detection efficiency of the grounding carbon brushes and reduce the manual workload.

[0004] One aspect of the present disclosure provides a method for handling abnormalities of a train grounding carbon brush, the method comprising: detecting the working voltage signal of the acquisition chip using a register of the acquisition chip; generating a fault register record value when it is detected that the working voltage signal of the acquisition chip reaches a grounding carbon brush fault condition, wherein the grounding carbon brush fault condition is determined according to the normal voltage range when the working voltage signal of the acquisition chip exceeds a normal voltage range due to an abnormality of the grounding carbon brush; obtaining a duration of existence of the fault register record value when a temperature acquisition host recognizes the fault register record value; generating a prompt message indicating the abnormality of the grounding carbon brush when the duration of existence of the fault register record value reaches a predetermined duration; and handling the abnormal grounding carbon brush based on the prompt message.

[0005] According to an embodiment of the present disclosure, when it is detected that the working voltage signal of the acquisition chip reaches the grounding carbon brush fault condition, a fault register record value is generated, including: determining the fault information of the acquisition chip based on the matching between the working voltage signal of the acquisition chip and the grounding carbon brush fault condition; assigning a predetermined fault identifier to the register based on the fault information of the acquisition chip to obtain the fault register record value; and storing the fault register record value in the temperature acquisition host log file.

[0006] According to an embodiment of the present disclosure, the above-mentioned grounding carbon brush fault condition includes a first voltage range and a second voltage range, the above-mentioned first voltage range is a range greater than the maximum value in the above-mentioned normal voltage range, and the above-mentioned second voltage range is a range less than the minimum value in the above-mentioned normal voltage range; the above-mentioned determination of the fault information of the above-mentioned acquisition chip based on the matching of the working voltage signal of the above-mentioned acquisition chip and the above-mentioned grounding carbon brush fault condition includes: when the above-mentioned working voltage signal matches the above-mentioned first voltage range, obtaining the overvoltage fault information of the above-mentioned acquisition chip; when the above-mentioned working voltage signal matches the above-mentioned second voltage range, obtaining the undervoltage fault information of the above-mentioned acquisition chip.

[0007] According to an embodiment of the present disclosure, when the temperature acquisition host identifies the fault register record value, the duration of existence of the fault register record value is obtained, including: identifying the register record value in the log file of the temperature acquisition host at a preset frequency through the temperature acquisition host; when it is identified that the fault register record value exists in the log file of the temperature acquisition host, obtaining the continuous duration of existence of the fault register record value; or when it is identified that the fault register record value exists in the log file of the temperature acquisition host, obtaining the cumulative duration of existence of the fault register record value.

[0008] According to an embodiment of the present disclosure, when the above-mentioned fault register record value is identified to exist in the above-mentioned temperature acquisition host log file, the duration of the existence of the above-mentioned fault register record value is obtained, including: when the above-mentioned fault register record value is identified to exist in the above-mentioned temperature acquisition host log file, the appearance time and end time of the above-mentioned fault register record value are obtained; according to the above-mentioned appearance time and the above-mentioned end time, the duration of the above-mentioned fault register record value is generated.

[0009] According to an embodiment of the present disclosure, when it is identified that the fault register record value exists in the log file of the temperature acquisition host, the cumulative duration of the existence of the fault register record value is obtained, including: obtaining the power-on cycle duration of the temperature acquisition host; accumulating the duration that the fault register record value appears within the power-on cycle duration to obtain the cumulative duration of the fault register record value.

[0010] According to an embodiment of the present disclosure, the above-mentioned processing of the abnormal grounding carbon brush based on the above-mentioned prompt information includes: latching the above-mentioned prompt information according to a predetermined latching time; and sending the above-mentioned prompt information to the train network system, and displaying the above-mentioned prompt information to the target object through the train network system display screen, so that the target object measures the resistance of the above-mentioned abnormal grounding carbon brush or replaces the grounding carbon brush.

[0011] According to an embodiment of the present disclosure, the above method further includes: when sending the above prompt information to the train network system, clearing the duration of the existence of the above fault register record value.

[0012] Another aspect of the present disclosure provides an axle temperature detection system, which is used to implement the above-mentioned abnormality handling method for the train grounding carbon brush; wherein the axle temperature detection system includes a temperature acquisition host, a temperature sensor and a reference resistor; the temperature sensor is connected to the temperature acquisition host via a cable, and the temperature acquisition host is equipped with an acquisition chip, which has its own constant voltage drive source, and the current of the acquisition chip flows through the reference resistor, the cable and the temperature sensor to form an acquisition loop, which is affected by the grounding carbon brush of the train.

[0013] Another aspect of the present disclosure provides a train, which includes a gearbox, a grounding carbon brush, a slip ring, and the above-mentioned axle temperature detection system; wherein the above-mentioned gearbox is grounded, and the ground return current is obtained by contacting the above-mentioned grounding carbon brush with the above-mentioned slip ring to obtain a vehicle grounding circuit. In the event of an abnormality in the above-mentioned grounding carbon brush, the above-mentioned vehicle grounding circuit is disconnected, and the induced voltage in the above-mentioned vehicle grounding circuit is coupled to the above-mentioned acquisition circuit, causing the operating voltage signal of the above-mentioned acquisition chip to exceed the normal voltage range.

[0014] According to the method for handling abnormalities of train grounding carbon brushes provided by the embodiment of the present disclosure, the working voltage signal of the acquisition chip is detected by using a register; when it is detected that the working voltage signal of the acquisition chip reaches the grounding carbon brush fault condition, a fault register record value is generated; when the temperature acquisition host recognizes the fault register record value, the duration of the fault register record value is obtained; when the duration of the fault register record value reaches a predetermined duration condition, a prompt message indicating abnormality of the grounding carbon brush is generated; and based on the prompt message, the abnormal grounding carbon brush is handled. Because in the above-mentioned processing process, whether the grounding carbon brush has an abnormality is automatically determined based on the working voltage signal of the acquisition chip and the duration of the fault register record value, and the abnormality prompt message of the grounding carbon brush is generated, the problem of the high manual workload and low abnormality detection efficiency caused by manual observation and determination of whether the grounding carbon brush has an abnormality in the related art is at least partially overcome, thereby achieving the technical effect of improving the abnormality detection efficiency of the grounding carbon brush and reducing the manual workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0016] Figure 1A diagram schematically illustrates an application scenario of a method for handling abnormalities of a train grounding carbon brush according to an embodiment of the present disclosure;

[0017] Figure 2 The working principle diagram of the acquisition chip according to the embodiment of the present disclosure is schematically shown;

[0018] Figure 3 A flowchart schematically illustrates a method for handling abnormalities of a train grounding carbon brush according to an embodiment of the present disclosure; and

[0019] Figure 4 A method for handling abnormalities of a train grounding carbon brush according to another embodiment of the present disclosure is schematically illustrated. DETAILED DESCRIPTION

[0020] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the detailed description below, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0021] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0022] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0023] When expressions such as "at least one of A, B, and C, etc." are used, they should generally be interpreted in accordance with the meaning commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0024] In the technical solutions disclosed herein, the user information (including but not limited to user personal information, user image information, user device information, such as location information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved are all information and data authorized by the user or fully authorized by all parties, and the collection, storage, use, processing, transmission, provision, disclosure and application of the relevant data comply with relevant laws, regulations and standards, take necessary confidentiality measures, do not violate public order and good morals, and provide corresponding operation entrances for users to choose to authorize or refuse.

[0025] Train bogies are equipped with grounding carbon brushes, which quickly dissipate induced currents to prevent interference with other equipment. Currently, replacement of these brushes is determined manually by inspection, resulting in a high workload and low efficiency in detecting abnormalities.

[0026] During the process of implementing the inventive concept disclosed herein, the inventors discovered that when the grounding carbon brushes are poorly grounded, the temperature detection sensor on the train's running section will experience interference, causing the detection circuit to malfunction, disrupting the temperature detection system's acquisition chip, and thus interfering with the temperature detection operation. In view of this, the embodiments disclosed herein provide a method for handling abnormalities in train grounding carbon brushes. By indirectly detecting whether the grounding carbon brushes are abnormal based on whether the operating voltage signal of the acquisition chip is disturbed, the method allows for prompt replacement. This method at least partially avoids the high workload associated with manually observing and confirming whether the grounding carbon brushes are abnormal, as well as the low efficiency of detecting abnormalities in the grounding carbon brushes. This method improves the efficiency of detecting abnormalities in the grounding carbon brushes and reduces manual workload.

[0027] Specifically, the method includes: using the register of the acquisition chip to detect the working voltage signal of the acquisition chip; generating a fault register record value when it is detected that the working voltage signal of the acquisition chip reaches the grounding carbon brush fault condition, wherein the grounding carbon brush fault condition is determined according to the normal voltage range when the working voltage signal of the acquisition chip exceeds the normal voltage range due to the abnormality of the grounding carbon brush; when the temperature acquisition host recognizes the fault register record value, obtaining the duration of the existence of the fault register record value; when the duration of the existence of the fault register record value reaches a predetermined duration condition, generating a prompt message of the grounding carbon brush abnormality; based on the prompt message, processing the abnormal grounding carbon brush.

[0028] Figure 1 The following schematically shows an application scenario diagram of the abnormality handling method for train grounding carbon brushes according to an embodiment of the present disclosure.

[0029] like Figure 1As shown, the application scenario 100 according to this embodiment may include a train 101 , an axle temperature detection system 102 , and a grounding carbon brush 103 .

[0030] Train 101 may include a driver's cab 1011 and a standard car 1012. Driver's cab 1011 is used to control the train's direction of travel. Driver's cab 1011 may be equipped with a display terminal 1011-1, which may include a display screen for displaying information such as abnormalities in the grounding carbon brush. The axle temperature detection system 102 may be connected to the display terminal 1011-1 via a network, such as a wired or wireless communication link or fiber optic cable.

[0031] Both the cab compartment 1011 and the standard compartment 1012 can be equipped with an axle temperature detection system 102, which can include a temperature acquisition host and a temperature sensor. The temperature acquisition host can be configured with an acquisition chip for collecting temperature. The acquisition chip can be configured with a register for detecting the operating status of the acquisition chip, such as detecting the operating voltage signal of the acquisition chip, and indirectly determining whether the grounding carbon brush is abnormal based on whether the operating voltage signal reaches the grounding carbon brush fault condition. An abnormal grounding carbon brush can interfere with the operating voltage signal, thereby reaching a fault condition.

[0032] Both the cab car 1011 and the standard car 1012 can be equipped with grounding carbon brushes 103 on the bottom bogies to quickly discharge the induced voltage on the bogies. When the grounding carbon brushes are abnormal, such as when they are in poor contact, the induced voltage generated on the bogies cannot be discharged to the ground through the grounding carbon brushes. Instead, it is conducted to the acquisition chip and coupled to the acquisition circuit based on the acquisition chip, causing the acquisition chip's operating voltage signal to exceed the normal operating range, rendering the acquisition chip unable to operate normally. Therefore, by determining whether the acquisition chip's operating voltage signal exceeds the normal operating range or reaches the grounding carbon brush failure condition, it is indirectly determined whether the grounding carbon brushes are abnormal.

[0033] It should be understood that Figure 1 The scenes in this video are just for reference. Figure 1 The number and positions of trains, carriages, axle temperature detection systems, temperature acquisition hosts, temperature sensors, registers, and grounding carbon brushes are for illustration only. Any number of trains, carriages, axle temperature detection systems, temperature acquisition hosts, temperature sensors, registers, and grounding carbon brushes may be used as needed, and the positions of these components may be adjusted as needed.

[0034] The disclosed embodiment can utilize the fault information reported by the axle temperature detection system to indirectly diagnose the poor grounding effect of the bogie grounding carbon brush. Specifically, there may be many reasons that lead to the failure of the axle temperature detection system, but the failure of the axle temperature detection system caused by the abnormality of the grounding carbon brush is different from the failure of the axle temperature detection system caused by the abnormality of the non-grounding carbon brush. The failure of the axle temperature detection system caused by the abnormality of the non-grounding carbon brush may be that the temperature value exceeds the specified range, etc. These reasons will not affect the normal operation of the acquisition chip, that is, the acquisition chip can still collect temperature, convert temperature, etc. When the grounding carbon brush is poorly grounded, the induced voltage on the bogie will be transmitted to the interface circuit of the acquisition chip, causing the operating voltage of the acquisition chip to exceed the normal operating voltage range, resulting in the acquisition chip being unable to convert the temperature normally, and the acquisition chip can diagnose the corresponding fault code based on the voltage range (such as the predetermined fault identifier 0x04), thereby indirectly identifying the abnormality of poor contact of the grounding carbon brush.

[0035] Optionally, each carriage of the train set can be equipped with an axle temperature detection system for real-time monitoring of axle box temperature changes. This axle temperature detection system can be used to implement the aforementioned method for handling abnormalities in train grounding carbon brushes. In one embodiment, the axle temperature detection system can include a temperature acquisition host, temperature sensors, and a reference resistor. The temperature sensors are installed on the stator core, transmission end bearing, and non-transmission end bearing of the motor and are connected to the temperature acquisition host via cables and connectors. The temperature acquisition host can be equipped with a MAX3186 acquisition chip for temperature acquisition.

[0036] Figure 2 The working principle diagram of the acquisition chip according to the embodiment of the present disclosure is schematically shown.

[0037] like Figure 2 As shown, the acquisition chip has its own constant voltage drive source to achieve bias voltage output. The current from the acquisition chip flows through the reference resistor, cable resistance, and temperature sensor resistance (such as a platinum resistor), forming an acquisition loop. The chip controls an internal multiplexer to separately acquire the voltages across the reference resistor and the temperature sensor's internal resistance. The temperature sensor's resistance is calculated using a ratio method and converted into a temperature value. For example, the reference voltage input positive terminal (REFIN+) and the reference voltage input negative terminal (REFIN-) can be used to acquire the voltage across the reference resistor; the input positive terminal (FORCE2), the RTD (Resistance Temperature Detector) input positive terminal (RTDIN+), and the RTD input positive terminal (RTDIN-) can be used to obtain the voltage across the temperature sensor's internal resistance.

[0038] Optionally, the temperature acquisition host interface can be used for data input and output, such as a low-level active data ready output, serial data input, serial data clock input, a low-level active chip select, and serial data output. The acquisition circuit of the temperature acquisition chip can refer to the acquisition circuit in the related art and will not be repeated here.

[0039] This data acquisition circuit can be affected by the train's grounding carbon brushes. For example, if the grounding carbon brushes are not in good contact, the induced voltage on the bogie cannot be released. This voltage is then transmitted to the temperature acquisition host through the temperature sensor cable on the motor and coupled into the data acquisition circuit signal, causing the data acquisition chip's operating voltage to exceed the normal operating voltage range, thereby interfering with the temperature acquisition of the axle temperature detection system.

[0040] In one embodiment, a grounding device may be provided on the train, and the gearbox is used for grounding. The grounding carbon brush contacts the collector ring to perform vehicle-to-ground return current, thereby obtaining a vehicle grounding circuit. When the grounding carbon brush is severely worn or stuck due to a fault, the vehicle grounding circuit is blocked, resulting in the induced voltage on the bogie in the vehicle grounding circuit having no circuit to discharge. The induced voltage will be transmitted to the temperature acquisition host through the temperature sensor cable on the motor, and coupled to the acquisition circuit signal, causing the acquisition chip to collect the voltage exceeding the operating voltage range, thereby seriously interfering with the temperature acquisition of the axle temperature real-time detection system.

[0041] The following will be passed Figure 3 The process of using the above-mentioned axle temperature detection system to indirectly detect whether the train grounding carbon brush is abnormal is described.

[0042] Figure 3 A flowchart of a method for handling abnormalities of a train grounding carbon brush according to an embodiment of the present disclosure is schematically shown.

[0043] like Figure 3 As shown, the abnormality handling method for a train grounding carbon brush of this embodiment includes operations S310 to S350.

[0044] In operation S310 , the operating voltage signal of the acquisition chip is detected using a register of the acquisition chip.

[0045] In operation S320, when it is detected that the working voltage signal of the acquisition chip reaches a grounding carbon brush fault condition, a fault register record value is generated, wherein the grounding carbon brush fault condition is determined based on the normal voltage range when the working voltage signal of the acquisition chip exceeds the normal voltage range due to an abnormality of the grounding carbon brush.

[0046] In operation S330 , when the temperature acquisition host identifies the fault register record value, the existence time of the fault register record value is obtained.

[0047] In operation S340 , when the duration of the fault register record value reaches a predetermined duration, prompt information indicating that the grounding carbon brush is abnormal is generated.

[0048] In operation S350 , the abnormal grounding carbon brush is processed based on the prompt information.

[0049] Optionally, the acquisition chip's internal registers are used to monitor its own operating status, for example, by detecting a fault flag once per second. In one embodiment, the fault flag may include the acquisition chip's operating voltage signal. For example, the acquisition chip's operating voltage signal is detected once per second. Upon detecting a change in the acquisition chip's operating voltage signal, the operating voltage signals before and after the change, or register record values ​​generated based on the operating voltage signals before and after the change (for example, within a range of less than -0.4V or greater than 3.4V, the register record value may be 0x04; within a range of greater than or equal to -0.4V and less than or equal to 3.4V, the register record value may be the actual voltage value or an indicator indicating no abnormality), may be stored in the temperature acquisition host log file. When storing the register record value, the time information associated with the register record value may also be stored.

[0050] In one embodiment, the acquisition chip can be provided with multiple acquisition channels and collect temperature from the multiple acquisition channels. Each acquisition channel can be distributed with at least one grounding carbon brush. By detecting the working voltage signals of different acquisition channels of the acquisition chip through the register, the register record values ​​of different acquisition channels can be obtained.

[0051] Optionally, the grounding brush fault condition can be determined based on the normal voltage range of the acquisition chip. For example, if the normal voltage range is greater than or equal to -0.4V and less than or equal to 3.4V, the grounding brush fault condition can be determined when the acquisition chip voltage is less than -0.4V or greater than 3.4V due to the abnormal grounding brush. If the operating voltage signal of the acquisition chip is within the grounding brush fault condition range, the grounding brush can be preliminarily considered abnormal and a fault register record value (e.g., 0x04) is generated.

[0052] Optionally, the temperature acquisition host can read the register record values ​​of all acquisition channels of the acquisition chip in the temperature acquisition host log file every second. When it is identified that the register record value of a sensor acquisition channel is 0x04, it can be considered that the grounding carbon brush at the corresponding position of the acquisition channel is abnormal. Then, based on the length of the register record value, it is further determined whether the grounding carbon brush at the corresponding position is abnormal.

[0053] When the duration or cumulative duration of the register record value of 0x04 reaches a predetermined duration condition (for example, the duration is greater than or equal to 3s, or the cumulative duration is greater than or equal to 50s, etc.), it can be determined that there is an abnormality in the grounding carbon brush at the corresponding position, and then a prompt message of the grounding carbon brush abnormality can be generated and fed back to the target object so that the target object can measure the resistance of or replace the abnormal grounding carbon brush according to the prompt message.

[0054] According to the method for handling abnormalities of train grounding carbon brushes provided by the embodiment of the present disclosure, the working voltage signal of the acquisition chip is detected by using a register; when it is detected that the working voltage signal of the acquisition chip reaches the grounding carbon brush fault condition, a fault register record value is generated; when the temperature acquisition host recognizes the fault register record value, the duration of the fault register record value is obtained; when the duration of the fault register record value reaches a predetermined duration condition, a prompt message indicating abnormality of the grounding carbon brush is generated; and based on the prompt message, the abnormal grounding carbon brush is handled. Because in the above-mentioned processing process, whether the grounding carbon brush has an abnormality is automatically determined based on the working voltage signal of the acquisition chip and the duration of the fault register record value, and the abnormality prompt message of the grounding carbon brush is generated, the problem of the high manual workload and low abnormality detection efficiency caused by manual observation and determination of whether the grounding carbon brush has an abnormality in the related art is at least partially overcome, thereby achieving the technical effect of improving the abnormality detection efficiency of the grounding carbon brush and reducing the manual workload.

[0055] Optionally, the above-described process of generating a fault register record value when it is detected that the working voltage signal of the acquisition chip reaches the grounding carbon brush fault condition may include the following operations: determining the fault information of the acquisition chip based on the matching between the working voltage signal of the acquisition chip and the grounding carbon brush fault condition; assigning a predetermined fault identifier to the register based on the fault information of the acquisition chip to obtain the fault register record value; and storing the fault register record value in the temperature acquisition host log file.

[0056] Optionally, the grounding carbon brush fault condition includes a first voltage range and a second voltage range, the first voltage range is a range greater than the maximum value in the normal voltage range, and the second voltage range is a range less than the minimum value in the normal voltage range; according to the matching of the working voltage signal of the acquisition chip and the grounding carbon brush fault condition, the fault information of the acquisition chip is determined, including: when the working voltage signal matches the first voltage range, overvoltage fault information of the acquisition chip is obtained; when the working voltage signal matches the second voltage range, undervoltage fault information of the acquisition chip is obtained.

[0057] Optionally, the normal voltage range may be greater than or equal to -0.4V and less than or equal to 3.4V, the first voltage range may be a range greater than 3.4V, and the second voltage range may be a range less than -0.4V.

[0058] When the operating voltage signal is greater than 3.4V, an overvoltage fault message is detected for the acquisition chip; when the operating voltage signal is less than -0.4V, an undervoltage fault message is detected for the acquisition chip. It is understandable that because the internal constant voltage source is generated by the chip itself, the acquisition chip itself will not cause overvoltage or undervoltage conditions on the input pin. When an overvoltage or undervoltage fault is detected, it can be determined that it is caused by external interference, such as poor contact of the grounding carbon brush.

[0059] If the acquisition chip experiences overvoltage or undervoltage, a predetermined fault flag (e.g., 0x04) can be assigned to the register, resulting in a fault register record value. This fault register record value is then stored in the temperature acquisition host log file. The occurrence and end times of the fault register record value can also be stored.

[0060] According to the embodiments of the present disclosure, by detecting whether the operating voltage of the data acquisition chip is within a first voltage range or a second voltage range, it is possible to determine whether the data acquisition chip's operation is disturbed. However, because the first and second voltage ranges are determined based on the normal voltage range when the data acquisition chip's operating voltage signal exceeds the normal voltage range due to an abnormal grounding carbon brush, it is possible to indirectly determine whether the grounding carbon brush is abnormal, thereby reducing manual workload and improving the efficiency of grounding carbon brush abnormality detection.

[0061] Optionally, in the case described above where the temperature acquisition host identifies the fault register record value, it can be diagnosed that the channel signal is interfered with by an external voltage signal. For example, preliminary information on abnormal contact carbon brushes can be obtained, and then after relevant logical judgment, a prompt is given to the train network control system to check the grounding carbon brushes at the corresponding position.

[0062] Specifically, through the temperature acquisition host, the register record values ​​in the temperature acquisition host log file can be identified at a preset frequency (for example, every second); when a fault register record value (for example, 0x04) is identified in the temperature acquisition host log file, the duration of the existence of the fault register record value is obtained; or when a fault register record value is identified in the temperature acquisition host log file, the cumulative duration of the existence of the fault register record value is obtained.

[0063] Optionally, obtaining the duration of the fault register record value may include the following operations: upon identifying the presence of a fault register record value in the temperature acquisition host log file, obtaining the occurrence and end times of the fault register record value; and generating the duration of the fault register record value based on the occurrence and end times. The occurrence and end times may both be obtained from the temperature acquisition host log file. In one embodiment, the end time may also be the time the fault register record value (e.g., 0x04) is identified.

[0064] Optionally, the process of obtaining the cumulative duration of the existence of the fault register record value may include the following operations: obtaining the power-on cycle duration of the temperature acquisition host; accumulating the duration of the fault register record value appearing within the power-on cycle duration to obtain the cumulative duration of the fault register record value. The power-on cycle may refer to the duration between the power-on time and the power-off time of the temperature acquisition host. Generally, the time when the train departs from the train depot can be used as the power-on time of the temperature acquisition host, and the time when the train returns to the train depot after running can be used as the power-off time of the temperature acquisition host.

[0065] In one embodiment, when a 0x04 error record appears in an acquisition channel of the acquisition chip and the duration is greater than or equal to 3s or the cumulative duration of the 0x04 error is greater than or equal to 50s within a power-on cycle of the temperature acquisition host, a prompt for maintenance of the channel signal interference can be reported to the train network system, or a prompt information about an abnormal grounding carbon brush at the acquisition channel location can be reported.

[0066] Optionally, based on the prompt information, the process of handling an abnormal grounding carbon brush may include the following operations: latching the prompt information according to a predetermined latching duration; and sending the prompt information to the train network system, and displaying the prompt information to the target object through the train network system display screen, so that the target object measures the resistance of the abnormal grounding carbon brush or replaces the grounding carbon brush. Optionally, at the time of sending the prompt information to the train network system, the duration of the fault register record value may also be cleared. Optionally, the target object may include relevant personnel or an intelligent detection robot, which is used to measure the resistance of the abnormal grounding carbon brush or replace the grounding carbon brush.

[0067] Optionally, the prompt information can be locked for 3 minutes, and when the prompt information is reported to the train network system, the 0x04 error accumulated time is cleared to 0 and restarted.

[0068] Optionally, the prompt information is reported to the train network system, and an information prompt interface pops up on the driver's cab display screen, prompting the train to measure and replace the corresponding resistance of the grounding carbon brush at the corresponding position of the carriage or collection channel after returning to the depot.

[0069] According to the embodiments of the present disclosure, by automatically determining whether a grounding carbon brush is abnormal and providing prompts for abnormal grounding carbon brushes, the workload of manually determining whether a grounding carbon brush is abnormal can be reduced, thereby improving the efficiency of abnormal grounding carbon brush detection. The generation of prompt information also facilitates the timely handling of abnormal grounding carbon brushes, thereby improving train safety.

[0070] Figure 4 A method for handling abnormalities of a train grounding carbon brush according to another embodiment of the present disclosure is schematically illustrated.

[0071] like Figure 4 As shown, the method may include operations S410 to S460.

[0072] In operation S410 , a temperature detection operation of the shaft temperature detection system is started.

[0073] In operation S420, whether the temperature detection operation is disturbed is determined, for example, based on the status of the temperature detection operation or the working status of the shaft temperature detection system. If not, operation S410 is continued; if disturbed, operation S430 may be executed.

[0074] In operation S430, the operating voltage signal of the chip is collected by using register detection, and when a fault register record value is identified, the duration of the fault register record value is obtained.

[0075] In operation S440, the grounding carbon brush is determined to be abnormal based on the fault register value and duration. For example, if a 0x04 error is recorded on a data acquisition channel of the acquisition chip and persists for 3 seconds or longer, or if the cumulative duration of 0x04 errors during a power-on cycle of the temperature acquisition host is 50 seconds or longer, the grounding carbon brush is considered abnormal. If the grounding carbon brush is abnormal, operation S450 is executed; otherwise, operation S430 is continued.

[0076] In operation S450, a prompt message indicating that a grounding carbon brush abnormality occurs is sent to a train network system.

[0077] In operation S460, the display screen displays a prompt message indicating that the grounding carbon brush is abnormal.

[0078] According to the embodiments of the present disclosure, the sensor fault information reported by the running part temperature detection system can indirectly diagnose the poor grounding effect of the bogie grounding carbon brush and replace it in time, thereby reducing the workload of manual confirmation, improving the efficiency of abnormal detection of the grounding carbon brush, and thus improving the safety of train operation.

[0079] It should be noted that, unless it is explicitly stated that there is a sequence of execution between different operations shown in the flowchart in the embodiments of the present disclosure, or there is a sequence of execution between different operations in technical implementation, otherwise, the execution order between multiple operations may not be prioritized, and multiple operations may also be executed simultaneously.

[0080] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment, or a part of code, and the above-mentioned module, program segment, or a part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0081] Those skilled in the art will appreciate that the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways, even if such combinations and / or couplings are not explicitly described in this disclosure. In particular, the features described in the various embodiments and / or claims of this disclosure may be combined and / or coupled in various ways without departing from the spirit and teachings of this disclosure. All such combinations and / or couplings are intended to fall within the scope of this disclosure.

[0082] The embodiments of the present disclosure are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A method for handling abnormalities of train grounding carbon brushes, characterized in that: The method is implemented by means of an axle temperature detection system, which includes a temperature acquisition host configured with an acquisition chip. The method includes: Utilizing the register of the acquisition chip to detect the working voltage signal of the acquisition chip; When it is detected that the working voltage signal of the acquisition chip reaches a grounding carbon brush fault condition, a fault register record value is generated, wherein the grounding carbon brush fault condition is determined based on the normal voltage range when the working voltage signal of the acquisition chip exceeds the normal voltage range due to an abnormal grounding carbon brush; When the temperature acquisition host recognizes the fault register record value, obtaining the duration of the fault register record value; When the duration of the fault register record value reaches a predetermined duration, generating a prompt message indicating that the grounding carbon brush is abnormal; Based on the prompt information, the abnormal grounding carbon brush is processed.

2. The method according to claim 1, characterized in that When it is detected that the working voltage signal of the acquisition chip reaches the grounding carbon brush fault condition, generating a fault register record value includes: Determining the fault information of the acquisition chip according to the matching condition between the working voltage signal of the acquisition chip and the fault condition of the grounding carbon brush; According to the fault information of the acquisition chip, a predetermined fault identifier is assigned to the register to obtain the fault register record value; and The fault register record value is stored in the temperature acquisition host log file.

3. The method according to claim 2, characterized in that The grounding carbon brush fault condition includes a first voltage range and a second voltage range, the first voltage range is a range greater than the maximum value in the normal voltage range, and the second voltage range is a range less than the minimum value in the normal voltage range; The determining the fault information of the acquisition chip according to the matching condition between the working voltage signal of the acquisition chip and the grounding carbon brush fault condition includes: When the operating voltage signal matches the first voltage range, obtaining overvoltage fault information of the acquisition chip; When the operating voltage signal matches the second voltage range, undervoltage fault information of the acquisition chip is obtained.

4. The method according to claim 2, characterized in that When the temperature acquisition host recognizes the fault register record value, obtaining the existence time of the fault register record value includes: Identifying register record values ​​in a log file of the temperature acquisition host at a preset frequency through the temperature acquisition host; When it is identified that the fault register record value exists in the temperature acquisition host log file, obtaining the duration of the existence of the fault register record value; or When it is identified that the fault register record value exists in the temperature acquisition host log file, the accumulated duration of the existence of the fault register record value is obtained.

5. The method according to claim 4, characterized in that When identifying that the fault register record value exists in the temperature acquisition host log file, obtaining the duration of the existence of the fault register record value includes: When it is identified that the fault register record value exists in the temperature acquisition host log file, obtaining the appearance time and end time of the fault register record value; A duration of the fault register record value is generated according to the occurrence time and the end time.

6. The method according to claim 4, characterized in that When identifying that the fault register record value exists in the temperature acquisition host log file, obtaining the accumulated duration of the fault register record value includes: Obtaining the power-on cycle duration of the temperature acquisition host; The duration of the fault register record value appearing within the power-on cycle duration is accumulated to obtain the accumulated duration of the fault register record value.

7. The method according to claim 1, characterized in that The processing of the abnormal grounding carbon brush based on the prompt information includes: latching the prompt information according to a predetermined latching time; and The prompt information is sent to the train network system, and the prompt information is displayed to the target object through the train network system display screen, so that the target object measures the resistance of the abnormal grounding carbon brush or replaces the grounding carbon brush.

8. The method according to claim 7, characterized in that The method further comprises: At the time of sending the prompt information to the train network system, the duration of the existence of the fault register record value is cleared.

9. A shaft temperature detection system, characterized in that: The axle temperature detection system is used to implement the abnormality handling method for a train grounding carbon brush according to any one of claims 1 to 8; Among them, the axle temperature detection system includes a temperature acquisition host, a temperature sensor and a reference resistor; the temperature sensor is connected to the temperature acquisition host through a cable, and the temperature acquisition host is equipped with an acquisition chip. The acquisition chip has its own constant voltage drive source. The current of the acquisition chip flows through the reference resistor, the cable and the temperature sensor to form an acquisition loop, and the acquisition loop is affected by the grounding carbon brush of the train.

10. A train, characterized in that: The train comprises a gearbox, a grounding carbon brush, a slip ring, and the axle temperature detection system according to claim 9; The gearbox is grounded, and the ground return current is obtained by contacting the collector ring through the grounding carbon brush to obtain a vehicle grounding circuit. In the event of an abnormality in the grounding carbon brush, the vehicle grounding circuit is disconnected, and the induced voltage in the vehicle grounding circuit is coupled to the acquisition circuit, causing the operating voltage signal of the acquisition chip to exceed the normal voltage range.

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