Sand control method, system and computer storage medium for rail vehicles

Abstract

This invention discloses a method, system, and computer storage medium for controlling sand replenishment in rail vehicles. The method includes: determining the maximum mileage that can be traveled further based on the current remaining sand quantity of the rail vehicle; when the maximum mileage is less than the target remaining mileage, determining whether the rail vehicle has the conditions to stop and replenish sand within the maximum mileage range; if not, sending a sand replenishment command to a sand replenishment device, the sand replenishment command being used to enter the rail vehicle at a station within the maximum mileage range to complete the on-line sand replenishment operation. This method, by real-time monitoring of the vehicle's remaining sand quantity, mileage traveled, and immediate judgment of whether sand replenishment conditions are met, ensures that the vehicle can be replenished in time before the sand quantity is exhausted, effectively avoiding malfunctions or accidents caused by insufficient sand, and ensuring the safety and stability of train operation.

Description

Technical Field

[0001] This invention relates to the field of urban rail vehicle braking system technology, and in particular to a rail vehicle sand-addition control method, system, and computer storage medium. Background Technology

[0002] In the field of rail vehicles, to ensure effective adhesion between the wheels and rails, vehicles are equipped with a sand-spraying system. This system increases the adhesion coefficient between the wheels and rails by spraying sand onto them, effectively improving the braking efficiency and stability of the rail vehicle. The amount of sand available for spraying depends on the capacity of the sand box, but the sand box capacity is often relatively small due to limitations in vehicle installation space and weight. To ensure sufficient sand supply throughout the vehicle's entire journey, the sand box capacity needs to be matched to the mileage.

[0003] However, in severe weather or during specific seasons (such as autumn when there is a lot of fallen leaves), the frequency or amount of sand application on the vehicles will increase significantly. This may result in insufficient sand in the sandboxes to support the vehicle's operation to the terminal station for refilling. When a vehicle has no sand or insufficient sand, it directly affects the safe operation of the vehicle. Therefore, ensuring that the vehicle has enough sand for application without altering normal operation is a pressing issue that rail vehicle manufacturers need to address. Summary of the Invention

[0004] One of the objectives of this invention is to provide a sand-addition control method for rail vehicles, in order to solve the technical problems of insufficient real-time performance and potential impact on vehicle safety operation due to insufficient sand quantity in the prior art, which relies on a one-time sand-addition operation.

[0005] One of the objectives of this invention is to provide a sand-filling control system for rail vehicles.

[0006] One of the objectives of this invention is to provide a computer storage medium.

[0007] To achieve one of the above-mentioned objectives, the present invention provides a method for controlling sand addition in rail vehicles, comprising: determining the maximum mileage that can be traveled afterward based on the remaining sand amount of the current rail vehicle; when the maximum mileage is less than the target remaining mileage, determining whether the rail vehicle has the conditions to stop and add sand within the maximum mileage range; if not, sending a sand addition command to a sand addition device, the sand addition command being used to enter the rail vehicle at a station within the maximum mileage range to complete the online sand addition operation.

[0008] As a further improvement of one embodiment of the present invention, after "determining whether the rail vehicle has the conditions for stopping and replenishing sand within the maximum mileage range", the method further includes: if so, determining the target sand replenishment station within the maximum mileage range, and controlling the rail vehicle to stop at the target sand replenishment station; the target sand replenishment station is the sand replenishment station farthest from the current location of the rail vehicle within the maximum mileage range.

[0009] As a further improvement of one embodiment of the present invention, the step of "determining whether the rail vehicle has the conditions for stopping and replenishing sand within the maximum mileage range" specifically includes: obtaining several parking durations of the rail vehicle within the maximum mileage range; determining whether there is a sand replenishment station with a parking duration greater than or equal to the sand replenishment duration; the sand replenishment duration is the time required to fill the current sand box; if so, it is determined that the rail vehicle has the conditions for stopping and replenishing sand within the maximum mileage range.

[0010] As a further improvement to one embodiment of the present invention, the step of "sending a sand-adding command to the sand-adding device, the sand-adding command being used to enter the rail vehicle at a station within the maximum mileage range to complete the online sand-adding operation" specifically includes: sending a sand-adding command to the sand-adding device, the sand-adding command being used to enter the rail vehicle at a target sand-adding station in the direction of rail vehicle operation, in order of distance from the nearest to the farthest stopping station within the maximum mileage range to complete the sand-adding operation; the target sand-adding station is the preceding sand-adding station within the maximum mileage range that is the furthest sand-adding station from the current location of the rail vehicle.

[0011] As a further improvement of one embodiment of the present invention, the step of "determining the maximum mileage that can be traveled afterward based on the remaining sand amount of the current rail vehicle" specifically includes: determining the maximum mileage based on the average amount of sand spread by the rail vehicle and the remaining sand amount.

[0012] As a further improvement of one embodiment of the present invention, before the step of "based on the average sand spreading amount of the rail vehicle and the remaining sand amount", the method further includes: determining whether the route traveled by the rail vehicle is the first run; if not, then calculating the historical total sand spreading amount and the historical total sand spreading number for the current target remaining mileage; calculating the ratio of the historical total sand spreading amount to the historical total sand spreading number to obtain the average sand spreading amount.

[0013] As a further improvement of one embodiment of the present invention, the method further includes: after determining whether the route traveled by the rail vehicle is the first operation, the method further includes: if so, then counting the total amount of sand spread and the total number of sand spreads of the current mileage traveled; calculating the ratio of the total amount of sand spread to the total number of sand spreads to obtain the average amount of sand spread.

[0014] As a further improvement of one embodiment of the present invention, before "determining the maximum mileage that can be traveled afterward based on the remaining sand amount of the current rail vehicle", the method further includes: determining the remaining sand amount of the current rail vehicle based on the difference between the total capacity of the sand box and the total amount of sand spread by the rail vehicle; the total amount of sand spread is the total amount of sand consumed by the rail vehicle when it travels to the current position.

[0015] As a further improvement of one embodiment of the present invention, before the step of "determining the remaining amount of sand in the current rail vehicle based on the difference between the total capacity of the sand box and the total amount of sand spread by the rail vehicle", the method further includes: obtaining the current operating speed of the rail vehicle; determining a sand spreading rate that matches the operating speed; and determining the corresponding total amount of sand spread based on the sand spreading rate and the operating speed.

[0016] As a further improvement of one embodiment of the present invention, the method further includes: controlling the rail vehicle to send information about the sand box to be added to the sand adding device, wherein the sand box information is used to determine the stopping position of the sand adding device so as to achieve sand replenishment by stopping.

[0017] To achieve one of the above-mentioned objectives, the present invention also provides a track vehicle sand-addition control device, comprising: a determining module, configured to determine the maximum mileage that can be traveled subsequently based on the current remaining sand amount of the track vehicle; a control module, configured to determine whether the track vehicle has the conditions for stopping to add sand within the maximum mileage range when the maximum mileage is less than the target remaining mileage of the track vehicle; and configured to send a sand-addition command to a sand-addition device when the conditions for stopping to add sand are not met within the maximum mileage range, wherein the sand-addition command is used to enter the track vehicle at a station within the maximum mileage range to complete the on-line sand-addition operation.

[0018] To achieve one of the above-mentioned objectives, the present invention also provides a computer storage medium storing a computer program, wherein the computer program, when executed, causes the device containing the computer storage medium to perform the steps of the above-described rail vehicle sand-addition control method.

[0019] Compared with the prior art, the embodiments of the present invention have at least one of the following beneficial effects:

[0020] This invention employs a sand-addition control method for rail vehicles. When the remaining sand quantity of a rail vehicle is insufficient to support the vehicle in completing the target remaining journey, the remaining sand quantity and mileage of the vehicle are monitored in real time, and it is determined in real time whether there are stations with the conditions for stopping to add sand. If the conditions for stopping to add sand are not met, sand is added on-line to ensure that the vehicle can be replenished in time before the sand quantity is exhausted. This effectively avoids failures or accidents caused by insufficient sand, thereby ensuring the continuity and safety of vehicle operation. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the structure of a sand-addition control system for rail vehicles according to one embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of the steps of a sand-addition control method for rail vehicles according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the sand box configuration of a rail vehicle in one embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of step S2 in the sand-addition control method for rail vehicles according to an embodiment of the present invention.

[0025] Figure 5(a) is a schematic diagram of the steps before step M1 in one embodiment of the present invention.

[0026] Figure 5(b) is a schematic diagram of the steps prior to step M1 in another embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the steps before step S1 in a specific embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram illustrating the relationship between the amount of sand spread from the sand box of a rail vehicle and the vehicle's running speed in one embodiment of the present invention.

[0029] Figure 8 This is a flowchart illustrating the sand-addition control method for rail vehicles in a preferred embodiment of the present invention. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0031] It should be noted that the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] like Figure 1 As shown, one embodiment of the present invention provides a sand-addition control system 100 for rail vehicles.

[0033] In one embodiment, the rail vehicle sand-addition control system 100 includes a determination module 11.

[0034] Module 11 is used to determine the remaining sand quantity of the current rail vehicle. The remaining sand quantity includes the remaining sand quantity of a single sand box or the remaining sand quantity of the entire vehicle. This allows for either local or overall performance evaluation.

[0035] In one embodiment, the remaining sand level in the sand box can be directly detected using a sand level sensor. The sand level sensor is installed inside the sand box, a simple and direct method.

[0036] In one embodiment, the remaining sand in the sandbox can be determined using an indirect calculation method. Specifically, by recording the amount of sand consumed in each sand-spreading operation and combining this with the known total capacity of the sandbox, the remaining sand in the current sandbox is determined. This method does not require additional sensors, reducing costs and system complexity.

[0037] The determination module 11 is used to determine the maximum mileage that can be traveled afterward based on the remaining amount of sand in the current rail vehicle.

[0038] In one embodiment, the rail vehicle sand-addition control system 100 includes a control module 12.

[0039] The control module 12 is used to determine whether the rail vehicle has the conditions for stopping and replenishing sand within the maximum mileage range when the maximum mileage is less than the target remaining mileage of the rail vehicle.

[0040] In one embodiment, the control module 12 determines whether the conditions for parking and sand replenishment are met by judging the parking time of the rail vehicle at the stop station.

[0041] Specifically, the rail vehicle determines whether the stopping time at each stop is sufficient for the sand-filling device to fill the sand box; if so, it is determined that the rail vehicle has the conditions to stop and replenish sand within the maximum mileage range. The stops are included in the range covered by the maximum mileage range.

[0042] The control module 12 is used to send a sand-adding command to the sand-adding device when there are no conditions for stopping and adding sand within the maximum mileage range. The sand-adding command is used to enter the rail vehicle at the station within the maximum mileage range to complete the online sand-adding operation.

[0043] Specifically, when the conditions for stopping and replenishing sand are not met within the maximum mileage range, the control system sends a stop and replenishment command to the sand replenishment device. Upon receiving the stop and replenishment command, the sand replenishment device travels to a suitable position in advance according to the command information, waiting for the rail vehicle to arrive at the station and stop to perform the sand replenishment operation. This saves the tracking time of the sand replenishment device and shortens the sand replenishment time.

[0044] In one specific embodiment, the sand-adding device includes an intelligent maintenance vehicle, an intelligent sand-adding robot, or an intelligent sand-adding robot dog.

[0045] Continue to refer to Figure 1 The diagram illustrates the processing procedure of the sand-addition control system 100 for rail vehicles.

[0046] At the starting station, the rail vehicle fills its sandbox to its maximum capacity. During operation, the remaining sand level in the sandbox is monitored in real time. Based on this remaining sand level, the maximum distance the vehicle can travel is estimated, and the remaining route is determined based on the current location, thus determining the target remaining distance.

[0047] The rail vehicle determines whether the maximum mileage that can be traveled subsequently is less than the target remaining mileage; if so, it indicates that the remaining sand in the current sand box is insufficient to support the vehicle to travel to the terminal station or to the next sand refill station. The rail vehicle obtains all stops within the maximum mileage range (or the maximum mileage coverage) and their corresponding stopping durations, and determines whether the stopping duration at each stop is long enough to allow the vehicle to stop and refill sand.

[0048] If all stops within the maximum mileage range are ready for sand replenishment, the rail vehicle sends a sand replenishment request to the sand replenishment device, and the sand replenishment device in the station quickly enters standby mode.

[0049] When the railcar comes to a smooth stop at the station, the sand-adding device starts up according to the preset program. The device automatically moves to the vicinity of the sand-adding port of the vehicle and accurately docks with the sand-adding system of the vehicle to carry out the sand-adding operation when the vehicle stops.

[0050] If none of the stops within the determined maximum mileage range are equipped with sand replenishment facilities, the rail vehicle sends an online sand replenishment request to the sand replenishment device, and the sand replenishment device in the station quickly enters standby mode. When the rail vehicle arrives at the station, the sand replenishment device will quickly dock with the rail vehicle and safely enter the vehicle's interior.

[0051] As the vehicle begins to move, the sand-adding device will follow the vehicle's movement to add sand. It will intelligently adjust the sand-adding rate and amount based on factors such as the vehicle's speed, road conditions, and the amount of sand in the sand box, ensuring that the sand-adding task is completed before the vehicle reaches the next station.

[0052] When the vehicle reaches the next station, the sand-adding device will complete the online sand-adding task and disconnect from the vehicle's sand-adding system, safely leaving the vehicle to prepare for the next rail vehicle that needs online sand-adding. Of course, this invention does not necessarily require the sand-adding device to complete the online sand-adding operation at the next station; it may also complete the online sand-adding operation after several stations, depending on the actual situation, without making specific limitations.

[0053] The relationship between the modules and functions provided above in this invention is not absolutely fixed. In some embodiments, modules can be combined and integrated so that one module can perform the functions of multiple modules; in some embodiments, some functions can be separated and implemented by several additional modules.

[0054] For example, the determination module 11 and the control module 13 can be integrated into a processing module, which carries all or part of the functions of the above modules.

[0055] like Figure 2 As shown, one embodiment of the present invention provides a method for controlling sand addition to rail vehicles.

[0056] The aforementioned sand-addition control method for rail vehicles is applied to a sand-addition control system for rail vehicles.

[0057] In one embodiment, the rail vehicle sand-addition control system can be as follows: Figure 1 The configuration described above is referenced in the determination method provided by this invention. However, the rail vehicle sand-adding control system applied to the rail vehicle sand-adding control method provided by this invention is not limited to this configuration structure.

[0058] like Figure 2 As shown, the present invention provides a method for controlling sand addition in rail vehicles, specifically including the following steps:

[0059] Step S1: Determine the maximum mileage that can be traveled afterward based on the remaining sand volume of the current rail vehicle;

[0060] Step S2: When the maximum mileage is less than the target remaining mileage, determine whether the rail vehicle has the conditions to stop and replenish sand within the maximum mileage range;

[0061] If not, proceed to step S3 and send a sand-adding command to the sand-adding device. The sand-adding command is used to enter the rail vehicle at the station within the maximum mileage range to complete the online sand-adding operation.

[0062] In this way, by monitoring the remaining sand volume and mileage of the vehicle in real time, and by judging the sand replenishment conditions at the station in real time, the need for sand replenishment operation can be responded to in real time. When the remaining sand volume of the rail vehicle is insufficient to support the vehicle to complete the target remaining journey, by judging whether there are stations within the maximum mileage range that have the conditions to stop and replenish sand, it can be ensured that the vehicle can be replenished in time before the sand volume is exhausted, effectively avoiding failures or accidents caused by insufficient sand, thereby ensuring the continuity and safety of vehicle operation.

[0063] The maximum mileage refers to the maximum distance the rail vehicle can continue to travel given the current remaining sand volume. The target remaining mileage refers to the remaining travel distance the rail vehicle needs to travel from its current position to the next sand replenishment or addition point.

[0064] In one embodiment, the target remaining mileage refers to the distance between the current position of the rail vehicle and the terminal station.

[0065] In one embodiment, if the rail vehicle has the conditions to stop and replenish sand within the maximum mileage range, then a target sand replenishment station within the maximum mileage range is determined, and the rail vehicle is controlled to stop at the target sand replenishment station; the target sand replenishment station is the sand replenishment station farthest from the current location of the rail vehicle within the maximum mileage range.

[0066] In this way, by controlling the vehicle to stop at the farthest sand replenishment station, it can be ensured that the remaining sand volume can support the rail vehicle to run to the next sand replenishment point, while also taking into account the impact of sand volume load on vehicle operation, that is, balancing the relationship between sand volume and vehicle load.

[0067] The term "stopping for sand replenishment" refers to the process where, during the operation of a rail vehicle, when the amount of sand is insufficient, the vehicle needs to stop at a sand replenishment station, where a sand replenishment device will add sand to the rail vehicle.

[0068] The online sand addition refers to the process where, during the operation of a rail vehicle, when the vehicle stops for a short time and is insufficient to complete the sand replenishment operation, the sand addition device is controlled to quickly be put on the vehicle. As the vehicle continues to travel, the sand addition device is automatically controlled to add sand to the sand box according to the vehicle's speed and road conditions, so as to ensure that the vehicle has sufficient sand and maintain driving safety. This can minimize the time that the vehicle is interrupted due to sand replenishment.

[0069] In one embodiment, such as Figure 3 As shown, the sand replenishment operation of the rail vehicle can detect the remaining sand quantity of a single sand box; it can also detect the remaining sand quantity of multiple sand boxes simultaneously, and determine the corresponding target sand replenishment station based on the remaining sand quantity of each sand box. For example, at the first target sand replenishment station, only the first sand box needs sand replenishment; at the second target sand replenishment station, the third and fourth sand boxes need sand replenishment simultaneously. This invention does not impose specific limitations on this.

[0070] like Figure 4 As shown, in one embodiment, the step S2 of the present invention, "determining whether the rail vehicle has the conditions for parking and sand replenishment within the maximum mileage range", may specifically include the following steps.

[0071] Step S21: Obtain several stopping times of the rail vehicle within the maximum mileage range;

[0072] Step S22: Determine if there is a sand replenishment station with a parking time greater than or equal to the sand replenishment time; the sand replenishment time is the time required to fill the current sand box.

[0073] If so, proceed to step S23 to determine if the rail vehicle has the conditions for parking and sand replenishment within the maximum mileage range.

[0074] In this way, the rail vehicle can effectively utilize the parking time to replenish the sand box without affecting normal operation, ensuring that the sand box is kept in a sufficient state and avoiding potential operational risks due to insufficient sand.

[0075] The sand replenishment time refers to the time required to fill the sand box of the rail vehicle to its maximum capacity or a preset full sand state. When the remaining sand in the sand box is lower than a preset safety threshold, the vehicle must be stopped for sand replenishment to fill the sand box to its maximum capacity or a preset full sand state.

[0076] In one embodiment, all stops and their corresponding stop durations within the maximum mileage range are determined based on the operation plan and timetable of the rail vehicle's route.

[0077] In one embodiment, when there are multiple sand replenishment stations within the maximum mileage range where the rail vehicle has the conditions for parking and replenishing sand, any one of the sand replenishment stations is selected as the station where the sand replenishment device is loaded onto the vehicle.

[0078] Once the rail vehicle determines the target sand replenishment station within the maximum mileage range, the rail vehicle uses the Train Control and Management System (TCMS) to send a stop sand replenishment request to the sand replenishment device before stopping at the station. The sand replenishment device receives the stop sand replenishment request and automatically moves to the corresponding position on the platform in advance, waiting for the vehicle to stop at the station to complete the sand replenishment operation.

[0079] In one embodiment, the control rail vehicle sends sand box information to the sand-adding device. This sand box information is used to determine the stopping position of the sand-adding device, enabling sand replenishment during parking. This avoids manual operation, reduces costs, and improves automation.

[0080] The sand box information includes the code of the sand box to be replenished and its location in which carriage of the train. Furthermore, the train control and management system shares information with the sand replenishment device, including but not limited to the platform location where the train is stopped.

[0081] In one embodiment, when multiple sand boxes require sand replenishment, a corresponding number of sand-adding devices can be controlled to perform sand replenishment operations separately. This can shorten the sand-adding time.

[0082] In one embodiment, when the rail vehicle has the conditions to stop and replenish sand within the maximum mileage range, a sand replenishment command is sent to the sand replenishment device. The sand replenishment command is used to enter the rail vehicle at the target sand replenishment station in the direction of operation of the rail vehicle, in order of distance from the nearest to the farthest stop within the maximum mileage range, to complete the sand replenishment operation. The target sand replenishment station is the sand replenishment station before the sand replenishment station farthest from the current location of the rail vehicle within the maximum mileage range.

[0083] Thus, by choosing to enter the vehicle at the penultimate stop, on the one hand, the extra load on the vehicle due to the amount of sand can be minimized during the remaining journey, thereby reducing the resulting energy consumption; on the other hand, it can also ensure that the vehicle will not face a sand shortage before reaching the next sand replenishment point, thus maximizing operational safety.

[0084] In the above embodiment, the target sand-replenishing station refers to the preceding sand-replenishing station within the maximum mileage range that has the conditions for sand replenishment and is the station farthest from the current location of the rail vehicle. In other words, all stations within the maximum mileage range that have the conditions for sand replenishment are sorted according to their distance from the current location, and the target sand-replenishing station is the second to last station in the sorted list that has the conditions for sand replenishment.

[0085] To simplify the calculation process, this invention assumes that the amount of sand spread is uniformly distributed, that is, no matter how far the vehicle travels, the amount of sand spread per unit distance is the same.

[0086] In one embodiment, step S1 may specifically include the following steps.

[0087] Step M1: Determine the maximum mileage based on the average sand spreading amount of the rail vehicle and the remaining sand amount. The maximum mileage is equal to the ratio of the remaining sand amount to the average sand spreading amount.

[0088] Thus, determining the maximum mileage using the average sand application rate provides an objective and quantifiable basis, and the calculation method is simple and easy to understand. Step M1 can be understood as a derivative step of step S1.

[0089] As shown in Figure 5(a), in one specific embodiment, the method further includes the following steps before the step of "based on the average amount of sand spread by the rail vehicle and the remaining amount of sand".

[0090] Step M01: Determine whether the route traveled by the rail vehicle is its first run;

[0091] If not, proceed to step M012 to calculate the total historical sand spreading amount and the total historical sand spreading times for the remaining mileage of the current target.

[0092] Step M013: Calculate the ratio of the total historical sand application amount to the total historical sand application frequency to obtain the average sand application amount.

[0093] Thus, by using historical records to determine the average sand application rate, a level of accuracy based on practical experience can be achieved, making the predictions more consistent with reality. The historical records contain sand application data from rail vehicles on the route, reflecting the actual sand application practices during vehicle operation.

[0094] In one embodiment, historical data of the rail vehicle's travel on the route corresponding to the remaining target mileage within a unit sampling period is obtained; historical records similar to the current environmental conditions (such as weather conditions, road conditions, and vehicle conditions) are filtered from the historical data; the total amount of sand spread and the total number of sand spreads in the historical records are counted to determine the corresponding average amount of sand spread.

[0095] For example, by statistically analyzing the total amount of sand spread (P) and the number of times sand was spread (Q) from station A to station B corresponding to the remaining distance of the target route within a day, the corresponding historical average amount of sand spread (P / Q) can be calculated. This historical average amount of sand spread is then used as the basis for calculating the maximum mileage.

[0096] As shown in Figure 5(b), in another specific embodiment, the method further includes the following steps before the step of “based on the average amount of sand spread by the rail vehicle and the amount of remaining sand”.

[0097] Step M01: Determine whether the route traveled by the rail vehicle is its first run;

[0098] If so, proceed to step M022 to calculate the total amount of sand spread and the total number of sand spreads for the current mileage traveled;

[0099] Step M023: Calculate the ratio of the total amount of sand applied to the total number of sand applications to obtain the average amount of sand applied.

[0100] In this way, by using the actual sand-spreading data of the mileage already traveled, the actual situation of the vehicle's sand-spreading under the current route, current vehicle status, and current environmental conditions can be directly reflected, rather than empirical estimation, making the obtained data closer to the actual operating conditions of the vehicle under the current environment.

[0101] In one embodiment, the remaining amount of sand on the current rail vehicle is determined based on the difference between the total capacity of the sand box and the total amount of sand spread by the rail vehicle; the total amount of sand spread is the total amount of sand consumed by the rail vehicle when it reaches its current position.

[0102] In this way, by calculating the difference between the total capacity of the sand box and the total amount of sand sprinkled, the remaining amount of sand can be determined. This avoids visual or sensor detection errors caused by uneven distribution of sand or sand not being on the same horizontal line, thus ensuring the accuracy and reliability of the remaining amount of sand calculation.

[0103] In one specific embodiment, the present invention may also employ a sand quantity sensor to detect the remaining sand quantity, without making specific limitations thereto.

[0104] like Figure 6 As shown, in one specific embodiment, before the step of "determining the remaining amount of sand in the current rail vehicle based on the difference between the total capacity of the sand box and the total amount of sand spread by the rail vehicle", the method further includes the following steps.

[0105] Step P11: Obtain the current operating speed of the rail vehicle;

[0106] Step P12: Determine the sand spreading rate that matches the operating speed, and determine the corresponding total sand spreading amount based on the sand spreading rate and the operating speed.

[0107] In this way, by adjusting the spreading rate according to the operating speed, it can be ensured that the amount of sand spread matches the operating speed, avoiding too much or too little sand spreading, thereby improving sand spreading efficiency and avoiding unnecessary waste.

[0108] It should be noted that, such as Figure 7 As shown, there are several ways to spread sand on rail vehicles, including constant speed sand spreading, high and low speed sand spreading, and variable speed sand spreading.

[0109] Constant-speed sand spreading refers to the practice of spreading sand at a fixed rate while the rail vehicle is in motion, without considering changes in vehicle speed.

[0110] High- and low-speed sand spreading refers to a method of determining the amount of sand spread based on the vehicle's operating speed, meaning there are two different sand spreading amounts. For example, when the vehicle's operating speed is higher than a preset threshold (such as 100 km / h), high-speed sand spreading is implemented, and the sand spreading device applies a higher sand spreading pressure; when the vehicle's operating speed is lower than the preset threshold, low-speed sand spreading is implemented, and the sand spreading device applies a lower sand spreading pressure.

[0111] Variable-speed sand spreading is based not only on speed, but also on factors such as track conditions and the coefficient of friction between the wheels and the track to determine the amount and rate of sand spreading. Therefore, the amount and rate of sand spreading are constantly changing.

[0112] In one embodiment, the sand-spreading operation of the rail vehicle is in response to a sand-spreading command. In other words, there is a one-to-one correspondence between the sand-spreading command and the sand-spreading operation; that is, the sand-spreading operation is executed as soon as the sand-spreading command is received.

[0113] In one embodiment, the sand-spreading command may come from the driver, the automatic control system, or an automatic triggering mechanism based on certain sensor data.

[0114] In one embodiment, step P12 may specifically include the following steps.

[0115] Step P12': Determine the total sand spreading amount for the current rail vehicle based on the single sand spreading amount of the rail vehicle. The single sand spreading amount is used to determine the sand spreading amount matching the sand spreading rate in response to a single sand spreading command.

[0116] In one embodiment, the product of the sand spreading rate, the running speed, and the corresponding sand spreading time is calculated to obtain the amount of sand spread in a single operation.

[0117] In one embodiment, the total sand spreading amount is obtained by summing the amount of sand spread in several individual instances over the distance traveled by the rail vehicle.

[0118] In one specific embodiment, when the track wheel adopts a high-low sand spreading method, the single sand spreading amount corresponding to a single sand spreading command includes both high-low sand spreading amounts.

[0119] Specifically, assuming the operating speed of the rail vehicle includes a first operating speed and a second operating speed; determine a first sand-spreading rate matching the first operating speed and a second sand-spreading rate matching the second operating speed; calculate the sum of the product of the first sand-spreading rate and the corresponding first sand-spreading time, and the product of the second sand-spreading rate and the corresponding second sand-spreading time, to obtain the amount of sand spread in a single operation.

[0120] The first and second sand-spreading rates switch when the rail vehicle's operating speed reaches a certain speed threshold. For example, ... Figure 7 The high and low sand spreading methods shown switch the amount of sand spread / or the sand spreading rate when the vehicle speed reaches 140km / h.

[0121] The various embodiments, examples, or specific examples provided by this invention can be combined with each other to ultimately form multiple better embodiments.

[0122] For example, such as Figure 8 A schematic diagram illustrating the principle of a preferred embodiment of a sand-addition control method for rail vehicles is shown. The following will combine... Figure 8 The processing procedure of this preferred embodiment is summarized below.

[0123] When a rail vehicle departs from its starting station, it automatically obtains information about the train's operating route, including but not limited to the number of stations, operating mileage, operating time, and stop duration.

[0124] During operation, the rail vehicle can use a sand quantity sensor to detect the remaining sand quantity in the sand box (which can be a single one or multiple ones); and transmit it to the TCMS. The TCMS determines the maximum mileage for subsequent travel based on the received remaining sand quantity.

[0125] When the maximum driving mileage is less than the target remaining mileage, it is determined whether the stations within the maximum mileage range have the conditions for parking and sand replenishment. If so, when the sand level in the sand box is low, TCMS sends the request for sand replenishment, vehicle number, and sand box location information to the remote control center computer. The remote control center computer automatically matches the appropriate sand replenishment station, station information, and number of sand replenishment devices based on the parking duration, parking station location information, and sand replenishment device configuration.

[0126] Simultaneously, the remote control center computer activates the sand-adding device at the target sand-adding station in advance via a wireless communication control device. Upon receiving a sand-adding request from the remote computer, it performs a self-check and confirms that the status is normal. Then, it establishes a connection with the TCMS and sends the sand-adding device's number to the TCMS. The sand-adding device and the TCMS share information, including but not limited to the vehicle's station location and the specific carriage of the vehicle where the sand box requiring sand addition is located.

[0127] After confirming its arrival at the predetermined location based on shared information, the sand-adding device scans the QR code on the sand box to confirm it is the sand box to be replenished. Once successfully matched with the sand box, the sand-adding device automatically runs the replenishment program. First, it automatically disengages the sand box's anti-detachment device, opens the sand box cover, and uses a robotic arm within the device to fix the sand injection gun attached to the sand box's injection port. The sand-adding device then initiates automatic sand replenishment. When the sand level sensor in the sand box detects that the sand level has reached the set maximum sand level, the sand-adding device stops replenishing sand. The robotic arm returns the sand injection gun to its original position, and the sand box cover automatically locks.

[0128] The sand-adding device sends a "sand replenishment complete" signal to the remote control center computer, which then controls the alarm device to issue an audible and visual signal to alert maintenance personnel that sand replenishment is complete.

[0129] After completing all maintenance work, the sand-adding device returns to the sand-adding maintenance equipment room to go into standby mode. If the on-board power supply of the sand-adding device needs to be replenished, the automatic filling function can be activated in the equipment room to replenish the power.

[0130] Of course, the present invention can also control the alarm device to issue an audible and visual signal to prompt the driver when the TMCS receives a signal of insufficient sand quantity, and the driver can operate the rail vehicle according to the driver's manual.

[0131] One embodiment of the present invention provides a computer-readable storage medium.

[0132] In one embodiment, a computer-readable storage medium stores a computer program executed by the processor mentioned above, or a rail vehicle sand-addition control method from any of the aforementioned technical solutions.

[0133] When the processor executes the computer program, it can perform the description of the sand-addition control method for rail vehicles in any of the preceding technical solutions; therefore, it will not be repeated here. Furthermore, the beneficial effects of using the same method will also not be repeated.

[0134] The computer-readable storage medium may include: flash drive, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0135] In summary, the present invention provides a method for controlling the sand supply of rail vehicles. When the remaining sand supply of a rail vehicle is insufficient to support the vehicle in completing the target remaining journey, the remaining sand supply and mileage of the vehicle are monitored in real time, and the availability of stations with the conditions for stopping to replenish sand is determined in real time. If the conditions for stopping to replenish sand are not available, sand is added on-line to ensure that the vehicle can be replenished in time before the sand supply is exhausted. This effectively avoids malfunctions or accidents caused by insufficient sand, thereby ensuring the continuity and safety of vehicle operation.

[0136] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0137] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling sand addition in rail vehicles, characterized in that, include: The maximum mileage that can be traveled afterward is determined based on the remaining amount of sand on the current rail vehicle. When the maximum mileage is less than the target remaining mileage, it is determined whether the rail vehicle has the conditions to stop and replenish sand within the maximum mileage range; If not, a sand-adding command is sent to the sand-adding device. The sand-adding command is used to enter the rail vehicle at the station within the maximum mileage range to complete the online sand-adding operation. Specifically, the online sand-adding operation includes: as the vehicle starts to move, the sand-adding device will follow the movement of the vehicle to perform the sand-adding operation. The determination of whether the rail vehicle has the conditions for stopping and replenishing sand within the maximum mileage range specifically includes: Obtain several parking durations of the rail vehicle within the maximum mileage range; determine whether there is a sand replenishment station with a parking duration greater than or equal to the sand replenishment duration; the sand replenishment duration is the time required to fill the current sand box; if so, determine that the rail vehicle has the conditions for parking and sand replenishment within the maximum mileage range.

2. The method for controlling sand addition in rail vehicles according to claim 1, characterized in that, After determining whether the rail vehicle has the conditions for stopping and replenishing sand within the maximum mileage range, the method further includes: If so, then determine the target sand replenishment station within the maximum mileage range, and control the rail vehicle to stop at the target sand replenishment station; the target sand replenishment station is the sand replenishment station farthest from the current location of the rail vehicle within the maximum mileage range.

3. The method for controlling sand addition in rail vehicles according to claim 1, characterized in that, The phrase "sending a sand-adding command to the sand-adding device, the sand-adding command being used to enter the rail vehicle at a station within the maximum mileage range to complete the online sand-adding operation" specifically includes: A sand-adding command is sent to the sand-adding device. The sand-adding command is used to enter the rail vehicle at the target sand-adding station in the direction of operation of the rail vehicle, in order of distance from the nearest to the farthest stop within the maximum mileage range, to complete the sand-adding operation. The target sand-adding station is the sand-adding station before the sand-adding station farthest from the current location of the rail vehicle within the maximum mileage range.

4. The method for controlling sand addition in rail vehicles according to claim 1, characterized in that, The phrase "determining the maximum mileage that can be traveled afterward based on the remaining sand volume of the current rail vehicle" specifically includes: The maximum mileage is determined based on the average amount of sand spread by the rail vehicle and the amount of sand remaining.

5. The method for controlling sand addition in rail vehicles according to claim 4, characterized in that, Before the phrase "based on the average amount of sand spread by the rail vehicle and the remaining amount of sand", the method further includes: Determine whether the route the rail vehicle is traveling on is its first run; If not, then calculate the total historical sand spreading amount and the total historical sand spreading times for the remaining mileage of the current target; The average sand application amount is obtained by calculating the ratio of the total historical sand application amount to the total historical sand application frequency.

6. The method for controlling sand addition in rail vehicles according to claim 5, characterized in that, After determining whether the route traveled by the rail vehicle is its first operation, the method further includes: If so, then calculate the total amount of sand spread and the total number of sand spreads based on the current mileage traveled; The average sand amount is obtained by calculating the ratio of the total sand application amount to the total number of sand application times.

7. The method for controlling sand addition in rail vehicles according to claim 1, characterized in that, Before the step of "determining the maximum mileage that can be traveled subsequently based on the remaining sand volume of the current rail vehicle", the method further includes: The remaining amount of sand on the current track vehicle is determined based on the difference between the total capacity of the sand box and the total amount of sand spread by the track vehicle; the total amount of sand spread is the total amount of sand consumed by the track vehicle when it reaches its current position.

8. The method for controlling sand addition in rail vehicles according to claim 7, characterized in that, Before the step of "determining the remaining sand quantity of the current rail vehicle based on the difference between the total capacity of the sand box and the total sand spreading amount of the rail vehicle", the method further includes: Obtain the current operating speed of the rail vehicle; Determine a sand-spreading rate that matches the operating speed, and determine the corresponding total sand-spreading amount based on the sand-spreading rate and the operating speed.

9. The method for controlling sand addition in rail vehicles according to claim 1, characterized in that, The method further includes: The control rail vehicle sends information about the sand box to be added to the sand adding device. The sand box information is used to determine the stopping position of the sand adding device so as to achieve sand replenishment when the vehicle stops.

10. A sand-feeding control system for rail vehicles, characterized in that, include: The determination module is used to determine the maximum mileage that can be traveled afterward based on the remaining amount of sand in the current rail vehicle; The control module is used to determine whether the rail vehicle has the conditions for stopping and adding sand within the maximum mileage range when the maximum mileage is less than the target remaining mileage of the rail vehicle; and to send a sand adding command to the sand adding device when the conditions for stopping and adding sand within the maximum mileage range are not met. The sand adding command is used to enter the rail vehicle at a station within the maximum mileage range to complete the online sand adding operation; wherein, the online sand adding operation specifically includes: as the vehicle starts to move, the sand adding device will follow the movement of the vehicle to perform the sand adding operation; The determination of whether the rail vehicle has the conditions for stopping and replenishing sand within the maximum mileage range specifically includes: Obtain several parking durations of the rail vehicle within the maximum mileage range; determine whether there is a sand replenishment station with a parking duration greater than or equal to the sand replenishment duration; the sand replenishment duration is the time required to fill the current sand box; if so, determine that the rail vehicle has the conditions for parking and sand replenishment within the maximum mileage range.

11. A computer storage medium storing a computer program, wherein the computer program, when executed, causes the device in which the computer storage medium is located to perform the steps of the rail vehicle sand-addition control method according to any one of claims 1-9.

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