Working state detection method, device and equipment of sander and readable storage medium

Abstract

The invention relates to a working state detection method, device and equipment of a sander and a readable storage medium. The method comprises the following steps: carrying out pressure detection on sand grains entering a sand discharging pipe through a pressure sensor mounted in the sand discharging pipe of the sander according to a preset detection frequency to obtain a plurality of target pressure signals; according to the target pressure signals, the working state of the sander is determined; and displaying the working state in a display device of a vehicle where the sander is located. By the adoption of the method, the pressure sensor installed in the sand discharging pipe of the sander can be used for conducting pressure detection on sand entering the sand discharging pipe, and then the working state of the sander is detected in real time according to the obtained multiple target pressure signals.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sand spreader, in particular to a working state detection method, device and equipment of sand spreader and a readable storage medium. BACKGROUND

[0002] The sand spreader is mainly applied to rail transit vehicles, and its function is to spread sand on the rail surface, increase the friction between the rail and the wheel, improve the wheel-rail adhesion of the vehicle in rainy and snowy weather and climbing process, and ensure the normal performance of the vehicle power.

[0003] In the related art, the sand spreading action of the sand spreader is triggered by the driver's foot switch, however, the driver cannot obtain the working state of the sand spreader in real time, so it is difficult to control the sand spreader according to the working state of the sand spreader. SUMMARY

[0004] Therefore, it is necessary to provide a working state detection method, device and equipment of sand spreader and a readable storage medium to realize real-time detection of the working state of the sand spreader.

[0005] In a first aspect, the present application provides a working state detection method of a sand spreader, comprising:

[0006] A pressure sensor installed in a sand outlet pipe of the sand spreader detects the pressure of the sand entering the sand outlet pipe according to a preset detection frequency, and obtains a plurality of target pressure signals;

[0007] According to the target pressure signals, the working state of the sand spreader is determined;

[0008] The working state is displayed on a display device of a vehicle where the sand spreader is located.

[0009] In one embodiment, according to the target pressure signals, the working state of the sand spreader is determined, comprising: determining the variation trend of the target pressure signals corresponding to the sand entering the sand outlet pipe according to the determination order of the target pressure signals; and determining the working state of the sand spreader according to the variation trend.

[0010] In one embodiment, according to the variation trend, the working state of the sand spreader is determined, comprising: in the case that the variation trend represents that all the target pressure signals belong to a first pressure range and the difference between any two adjacent target pressure signals is less than a preset difference, determining that the working state of the sand spreader is normal; and in the case that the variation trend represents that there is a target pressure signal not belonging to the first pressure range and / or the difference between any two adjacent target pressure signals is not less than the preset difference, determining that the working state of the sand spreader is abnormal.

[0011] In one of the embodiments, in the case that the variation trend representation exists and the target pressure signals do not belong to the first pressure range and / or the difference between two adjacent target pressure signals is not less than the preset difference, the working state of the sand spreader is determined as an abnormal state, including: in the case that the variation trend representation exists and the first number of continuous target pressure signals belong to the second pressure range, the working state of the sand spreader is determined as the sanding amount being less than the preset sanding amount; wherein the upper limit value of the second pressure range is less than the lower limit value of the first pressure range; in the case that the variation trend representation exists and the first number of continuous target pressure signals belong to the second pressure range, the working state of the sand spreader is determined as the first level of blockage existing; wherein the first type of change is that the target pressure signal increases to the upper limit value of the first pressure range within the second time length and decreases from the upper limit value to the lower limit value of the first pressure range; in the case that the variation trend representation exists and the target pressure signal decreases to any pressure signal of the preset pressure signal within the third time length and continuously stays at any pressure signal, the working state of the sand spreader is determined as the second level of blockage existing; wherein the preset pressure signal is less than the lower limit value of the second pressure range, and the blockage degree corresponding to the second level of blockage is higher than the blockage degree corresponding to the first level of blockage.

[0012] In one of the embodiments, the method further comprises: obtaining the driving speed of the vehicle where the sand spreader is located, the track slope of the driving track of the vehicle, and the track adhesion coefficient between the vehicle and the track; and establishing a corresponding relationship among the working state, the driving speed, the track slope, and the track adhesion coefficient.

[0013] In one of the embodiments, the method further comprises: displaying the working state in the display device of the background server of the sand spreader.

[0014] In one of the embodiments, the method further comprises: determining the weight and / or volume of the sand particles entering the sand drop pipe according to the target pressure signal; and displaying the weight and / or volume in the display device of the background server of the sand spreader.

[0015] In a second aspect, the application further provides a working state detection device of a sand spreader, comprising:

[0016] A detection module is configured to perform pressure detection on the sand particles entering the sand drop pipe according to a preset detection frequency through a pressure sensor installed in the sand drop pipe of the sand spreader, and obtain a plurality of target pressure signals.

[0017] A determination module is configured to determine the working state of the sand spreader according to the target pressure signals.

[0018] A display module is configured to display the working state in the display device of the vehicle where the sand spreader is located.

[0019] In a third aspect, the present application also provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0020] A pressure sensor is installed in the sand outlet pipe of the sand spreader, and the pressure of the sand entering the sand outlet pipe is detected at a preset detection frequency to obtain a plurality of target pressure signals;

[0021] The working state of the sand spreader is determined according to the target pressure signals.

[0022] The working state is displayed on a display device of a vehicle on which the sand spreader is located.

[0023] In a fourth aspect, the present application also provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the following steps:

[0024] A pressure sensor is installed in the sand outlet pipe of the sand spreader, and the pressure of the sand entering the sand outlet pipe is detected at a preset detection frequency to obtain a plurality of target pressure signals;

[0025] The working state of the sand spreader is determined according to the target pressure signals.

[0026] The working state is displayed on a display device of a vehicle on which the sand spreader is located.

[0027] The working state detection method, device, equipment and readable storage medium of the sand spreader can detect the pressure of the sand entering the sand outlet pipe of the sand spreader through the pressure sensor installed in the sand outlet pipe at a preset detection frequency to obtain a plurality of target pressure signals, determine the working state of the sand spreader according to the target pressure signals, and display the working state on a display device of a vehicle on which the sand spreader is located. Thus, the pressure of the sand entering the sand outlet pipe of the sand spreader is detected by the pressure sensor installed in the sand outlet pipe, and the sand directly contacts the pressure sensor, which ensures that the detection of the pressure sensor is not affected by environmental factors, solves the technical problem of lack of automatic feedback of the working state of the sand spreader in related technologies, realizes real-time and accurate detection of the working state of the sand spreader, and displays the working state on the display device of the vehicle, so that the driver can control the sand spreader according to the working state to improve the safety of the vehicle operation. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application or the related art. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 An application environment diagram of the working state detection method of the sand spreader in one embodiment;

[0030] Figure 2 A flowchart of the working state detection method of the sand spreader in one embodiment;

[0031] Figure 3 A flowchart of the working state detection method of the sand spreader in another embodiment;

[0032] Figure 4 A flowchart of the working state detection method of the sand spreader in still another embodiment;

[0033] Figure 5 A structural block diagram of the working state detection device of the sand spreader in one embodiment;

[0034] Figure 6 An internal structure diagram of the computer device in one embodiment. DETAILED DESCRIPTION

[0035] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0036] It should be noted that the terms "first", "second", and the like used in the present application can be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from the second element. The terms "include" and "have" and any variations thereof used in the present application are intended to cover non-exclusive inclusion. The term "multiple" used in the present application refers to two and more than two. The term "and / or" used in the present application refers to one of the solutions or any combination of multiple solutions.

[0037] Generally, the sanding amount of the sanding device can be adjusted in the range of 0.3L / min to 0.7L / min, and the sanding action is used in cooperation with the driver's foot switch, emergency braking, anti-slip, and the like. However, only the driver's foot switch triggered by the attendant can realize the sanding function or the automatic triggering of the sanding function in the emergency braking and slip working conditions. When the sanding amount is insufficient due to the blockage of the sanding pipe, sand clumping, and the like, the driver has difficulty in obtaining accurate feedback in time.

[0038] The related art uses video monitoring to monitor the working state of the sanding device in real time. However, the installation of the monitoring device is difficult, and the maintenance cost is high. At the same time, the monitoring accuracy of the video monitoring is low due to the influence of the vehicle vibration, dust, sand freezing, and the like, and it is difficult to identify special faults such as dust adhesion and freezing. On the other hand, the video monitoring can only determine whether sanding is performed or not, and cannot perform hierarchical diagnosis on the sanding amount anomaly (such as less than 0.3L / min), sensor failure, and poor circuit contact. Therefore, there is a technical problem of lagging fault handling.

[0039] Therefore, the present application provides a working state detection method, device, and equipment of a sanding device and a readable storage medium.

[0040] The working state detection method of the sanding device provided by the present application can be used in a server or a vehicle-mounted terminal. The server can be a physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services.

[0041] Optionally, the working state detection method of the sanding device provided by the present application can be applied to an application environment as shown in Figure 1 . The sanding device 20 communicates with the server 10 through a network. The data storage system can store the data required to be processed by the server 10. The data storage system can be integrated on the server 10, or placed on a cloud or other network server. The sanding device 20 includes a sand tank 220 for placing sand particles. When the attendant triggers the driver's foot switch, the sand tank 220 sprays sand particles, which pass through the sand dropping device 240 into the sand dropping pipe 230, and are transmitted to the sand outlet nozzle 250 through the sand flow channel 260, and are sprayed from the sand outlet nozzle 250 to the rail surface. The pressure sensor 210 is installed in the sand dropping pipe 230.

[0042] In an exemplary embodiment, as shown in Figure 2 , a working state detection method of a sanding device is provided. The method is applied to the server 10 in Figure 1 as an example, which includes the following S201 to S203. Wherein:

[0043] S201, detecting the pressure of the sand grains entering the sand outlet pipe according to a preset detection frequency through the pressure sensor installed in the sand outlet pipe of the sand spreader to obtain a plurality of target pressure signals.

[0044] For example, the pressure sensor can be a single pressure sensor or a pressure sensor group composed of a plurality of pressure sensors, that is, the number of pressure sensors installed in the sand outlet pipe of the sand spreader can be one or more. In order to avoid the deviation of the single sensor caused by the sand grains, the pressure sensor group including a plurality of pressure sensors is used to synchronously detect the pressure of the sand grains entering the sand outlet pipe.

[0045] In some embodiments, after the sand grains are scattered from the sand box, they enter the sand outlet pipe under the action of gravity and press the pressure sensor. Therefore, the pressure sensor can detect the pressure generated by the pressing of the sand grains and convert it into a pressure signal. The pressure signal can be an electrical signal generated by the pressure sensor, such as a voltage signal. In addition, since there is a certain mathematical correspondence between the electrical signal and the pressure value, a plurality of target pressure values can be obtained according to a plurality of target pressure signals output by the pressure sensor at a preset detection frequency. The unit of the target pressure value can be kPa (kilopascal).

[0046] The preset detection frequency represents the time interval of data collection by the pressure sensor. If the detection frequency is too low, the pressure sensor may not be able to capture the flow process of the sand grains in the sand outlet pipe in real time. If the detection frequency is too high, data redundancy may be generated. The value of the detection frequency can be flexibly set according to the vehicle model, the pressure sensor model, the track environment, etc. For example, it can be 100 Hz.

[0047] S202, determining the working state of the sand spreader according to the target pressure signals.

[0048] Optionally, the relationship between the pressure generated by the sand grains entering the sand outlet pipe and the time can be constructed according to the plurality of target pressure signals. Then, the fluctuation trend of the pressure signal or the corresponding pressure value and the change amplitude of the pressure signal or the corresponding pressure value can be analyzed according to the relationship to identify the working state of the sand spreader and determine the working state of the sand spreader.

[0049] In some embodiments, the vehicle is powered on, the sand spreader is started synchronously, and the pressure sensor performs pressure detection at a preset detection frequency. However, in the initial short period of time, the sand box may not be fully opened, and no sand grains or a few sand grains are scattered. Correspondingly, the pressure signal of the pressure sensor is 0, that is, an invalid pressure signal. In order to avoid the interference of the invalid pressure signal on the analysis of the working state, the invalid pressure signal can be filtered out from the target pressure signals to improve the accuracy of the working state detection.

[0050] S203, display the working state in the display device of the vehicle where the sand spreader is located.

[0051] Exemplarily, the display device of the sand spreader can display: x year x month x day x hour x minute-sand spreader working state is normal or x year x month x day x hour x minute-sand spreader sanding amount is abnormal. Further, the driver can control the sand spreader failure in time according to the displayed working state.

[0052] The working state detection method of the sand spreader can detect the pressure of the sand entering the sand pipe by the pressure sensor installed in the sand pipe of the sand spreader according to the preset detection frequency, obtain a plurality of target pressure signals, determine the working state of the sand spreader according to each target pressure signal, and display the working state in the display device of the vehicle where the sand spreader is located. Thus, the pressure of the sand entering the sand pipe is detected by the pressure sensor installed in the sand pipe of the sand spreader, and the sand directly contacts the pressure sensor, which ensures that the detection of the pressure sensor is not affected by environmental factors, solves the technical problem of lack of automatic feedback of the working state of the sand spreader in related technologies, realizes real-time and accurate detection of the working state of the sand spreader, and displays the working state in the display device of the vehicle, so that the driver can control the sand spreader according to the working state, and improve the safety of vehicle operation.

[0053] In some embodiments, the working state detection method of the sand spreader further comprises: obtaining the driving speed of the vehicle where the sand spreader is located, the track slope of the driving track of the vehicle, and the track adhesion coefficient between the vehicle and the track; and establishing a corresponding relationship between the working state, the driving speed, the track slope, and the track adhesion coefficient.

[0054] The driving speed can be the real-time running speed of the vehicle, which can be measured by a wheel speed sensor. The track adhesion coefficient represents the maximum static friction coefficient and sliding friction coefficient available between the wheels of the vehicle and the track contact surface.

[0055] Exemplarily, a single feature corresponding relationship between the driving speed, the track slope, and the track adhesion coefficient and the working state can be established, or a multi-dimensional corresponding relationship between at least two of the driving speed, the track slope, and the track adhesion coefficient and the working state can be established.

[0056] Further, the working state of the sand spreader can be analyzed according to the established corresponding relationship, and the change trend and change range of the working state of the sand spreader with the running speed, track slope and track adhesion coefficient can be determined. Then, the influence of the running speed, track slope and track adhesion coefficient on the working state of the sand spreader can be determined according to the determined change trend and change range, so as to improve the sand spreader or the vehicle to improve the safety of the vehicle operation. In addition, the performance of different types of sand spreaders can be analyzed through the corresponding relationship of different sand spreaders.

[0057] In an example, the method further includes displaying the working state on a display device of a background server of the sand spreader.

[0058] In an example, the background server is a server or terminal independent of the locomotive vehicle itself, located on the ground (such as a locomotive depot, vehicle depot, operation and maintenance center) or in the cloud.

[0059] In some embodiments, an alarm signal can be sent to the background server of the sand spreader to prompt the operation and maintenance personnel to repair or maintain the sand spreader in a timely manner when the working state of the sand spreader is detected to be abnormal.

[0060] In the above embodiment, the method further includes determining the weight and / or volume of the sand particles entering the sand pipe according to the target pressure signal, and displaying the weight and / or volume on a display device of a background server of the sand spreader.

[0061] In an example, the target pressure signal can be converted into the weight and / or volume of the sand particles entering the sand pipe according to the density and structural parameters of the sand particles. On this basis, the sand particles in the sand pipe can be quantitatively detected at each detection time / frequency point. Specifically, the weight and / or volume of the sand particles in the sand pipe at each detection time / frequency point can be determined, and the change of the weight and / or volume of the sand particles in the sand pipe at the current detection time / frequency point compared with the previous detection time / frequency point can also be determined.

[0062] Further, the weight and / or volume can be displayed on a display device of a background server of the sand spreader, so that the operation and maintenance personnel can execute corresponding operation and maintenance control strategies according to the real-time weight and / or volume of the sand particles in the sand pipe and the change of the weight and / or volume, to further ensure the safety of the vehicle operation.

[0063] It should be noted that in some embodiments, the weight and / or volume can also be displayed on a display device of a vehicle where the sand spreader is located, so that the driver can timely understand the sanding situation of the sand spreader.

[0064] On the basis of the above determination and display of the working state, the weight and / or volume of the sand particles entering the sand pipe are determined and displayed according to the target pressure signals, the sanding condition of the sanding device is quantitatively identified while the working state of the sanding device is qualitatively detected, and data interaction is performed with the background server to provide a reliable data basis for remote operation and maintenance of the sanding device and the vehicle.

[0065] On the basis of the above embodiment, as shown in Figure 3 The working state of the sanding device is determined according to each target pressure signal, including:

[0066] S301, the variation trend of the target pressure signal corresponding to the sand particles entering the sand pipe is determined according to the determination sequence of each target pressure signal.

[0067] In some embodiments, the variation trend is used to reflect the local variation law and the global variation law of the pressure signal, for example, the variation trend can include: smooth fluctuation of the pressure signal, monotonic rise or monotonic decline of the pressure signal, periodic fluctuation of the pressure signal, and smooth maintenance after rapid decline of the pressure signal.

[0068] Exemplarily, the determination sequence of each target pressure signal can be determined according to the detection time or detection frequency point corresponding to each target pressure signal, and each target pressure signal is sorted according to the determination sequence of each target pressure signal, so as to determine the variation trend according to the sorting result.

[0069] S302, the working state of the sanding device is determined according to the variation trend.

[0070] The working state includes normal working state and abnormal working state, and the abnormal working state can include insufficient sanding amount or blockage of the sanding device. The sanding device is connected between the sand pipe and the sand box, and is used to control the sand particles entering the sand pipe. The blockage of the sanding device can be caused by factors such as sand particle agglomeration, foreign matter intrusion, and water freezing. Optionally, the blockage of the sanding device can include a plurality of different degrees of blockage, for example, slight blockage and complete blockage, or slight blockage, moderate blockage, severe blockage and complete blockage.

[0071] Optionally, detection rules corresponding to different working states of the sanding device can be preset in advance, and the working state of the sanding device is determined according to the matching condition of the variation trend and the detection rule.

[0072] The embodiment determines the working state of the sand spreader according to the variation trend of the pressure signal corresponding to the sand particles entering the sand pipe, breaks through the technical barrier that the related art can only determine whether sand is spread, analyzes the variation trend of the pressure signal by using the pressure sensor, can maintain or repair the sanding device in a timely manner according to the determined working state when the sanding device is blocked, avoids further deterioration of the blocking degree, and thus ensures the safety of vehicle operation.

[0073] For example, on the basis of the above embodiment, the working state of the sand spreader is determined according to the variation trend, and the working state of the sand spreader includes: in the case that the variation trend indicates that all the target pressure signals belong to the first pressure range and the difference between any two adjacent target pressure signals is less than the preset difference, the working state of the sand spreader is determined as a normal state.

[0074] For example, the first pressure range can be 5 kPa - 10 kPa. Correspondingly, the preset difference can also be flexibly adjusted according to actual needs in combination with the normal sanding amount of the sand spreader, and the present application is not limited.

[0075] For example, in the detection process, in the case that the variation trend indicates that all the target pressure signals belong to the first pressure range and the difference between any two adjacent target pressure signals is less than the preset difference, it indicates that the pressure signal is in a steady fluctuation, and further indicates that the sand particles continuously and stably flow into the sand pipe in the sanding device, and thus the working state of the sand spreader can be determined as a normal state.

[0076] For example, in the case that the variation trend indicates that all the target pressure signals belong to 5 kPa - 10 kPa and the maximum difference between any two adjacent target pressure signals is 0.04 kPa, which is less than the preset difference 0.05 kPa, the working state of the sand spreader can be determined as a normal state.

[0077] In one embodiment, in the case that the variation trend indicates that there is a target pressure signal not belonging to the first pressure range and / or the difference between any two adjacent target pressure signals is not less than the preset difference, the working state of the sand spreader is determined as an abnormal state.

[0078] For example, in the detection process, in the case that the variation trend indicates that there is a target pressure signal not belonging to the first pressure range and / or the difference between any two adjacent target pressure signals is not less than the preset difference, it indicates that the pressure signal has a certain degree of fluctuation, and further indicates that the flow of sand particles in the sanding device may be interrupted, and thus the working state of the sand spreader can be determined as an abnormal state.

[0079] This embodiment introduces a first pressure range and a preset gap, and for the first time transforms the judgment of the sand spreader's working status from manual visual identification to automatic judgment based on objective and standard detection logic, thereby improving the accuracy and reliability of sand spreader working status detection.

[0080] Optionally, if the trend of change indicates that the pressure signal does not fall within the first pressure range and / or the difference between two adjacent target pressure signals is not less than a preset difference, the working state of the sand spreader is determined to be abnormal, including: if the trend of change indicates that a first number of consecutive target pressure signals fall within the second pressure range, the working state of the sand spreader is determined to be that the sand spreading amount is less than the preset sand spreading amount.

[0081] The upper limit of the second pressure range is lower than the lower limit of the first pressure range. For example, the second pressure range can be 1 kPa to 5 kPa. The first quantity can be flexibly adjusted according to the total number of target pressure signals and actual needs, and is not limited here.

[0082] In one embodiment, if, based on the trend of change, it is determined that there are a first number of consecutive target pressure signals belonging to the second pressure range, it indicates that the pressure signal of the sand particles on the sand inlet pipe is low and fluctuates gently, and thus it can be determined that the working state of the sand spreader is that the sand spreading amount is less than the preset sand spreading amount.

[0083] In this case, insufficient sand application can be displayed on the vehicle's display device and / or the back-end server's display device.

[0084] Optionally, if the trend of change indicates that the pressure is outside the first pressure range and / or the difference between two adjacent target pressure signals is not less than a preset difference, the working state of the sand spreader is determined to be abnormal. This also includes: if the target pressure signal in the trend of change indicates that there are a second number of consecutive first-type changes within a first time period, the working state of the sand spreader is determined to be that there is a first-level blockage.

[0085] The first type of change is characterized by the target pressure signal increasing to the upper limit of the first pressure range within the second duration, and then decreasing from the upper limit to the lower limit of the first pressure range. The first duration, the second duration, and the second quantity can be flexibly adjusted according to actual needs, and this application does not impose any limitations. For example, the first duration can be any duration between 5 min and 10 min, and the second duration can be any duration between 1 min and 3 min.

[0086] For example, if the target pressure signal, which represents a trend of change, exhibits a second number of consecutive first-type changes within a first time period, it indicates that multiple relatively drastic fluctuations occurred repeatedly during the detection process. This suggests that there may be a slight blockage within the sand-spreading device, thus determining that the sand spreader is in a first-level blockage state. Optionally, the first-level blockage may correspond to the aforementioned slight or moderate blockage.

[0087] In this situation, a first-level blockage fault in the sand spreader can be displayed on the vehicle's display device and / or the back-end server's display device.

[0088] Optionally, if the trend of change indicates a pressure range outside the first pressure range and / or the difference between two adjacent target pressure signals is not less than a preset difference, the working state of the sand spreader is determined to be abnormal. This also includes: if the target pressure signal in the trend of change drops to any pressure signal below the preset pressure signal within a third time period and remains at that pressure signal, the working state of the sand spreader is determined to be a second-level blockage. Optionally, the second-level blockage can correspond to the severe blockage or complete blockage mentioned above.

[0089] The preset pressure signal is lower than the lower limit of the second pressure range, for example, it can be 0.7 kPa. The degree of blockage corresponding to the second level of blockage is higher than that corresponding to the first level of blockage. The third duration can be flexibly adjusted according to actual needs, and this application does not limit it. For example, the third duration can be any duration between 0 min and 1 min.

[0090] In one embodiment, if the target pressure signal, which represents the trend of change, drops to any pressure signal below the preset pressure signal within a third time period and remains at any pressure signal, it indicates that the trend of change is fluctuating rapidly and is maintained at the pressure signal after the fluctuation. This indicates that a relatively serious blockage has occurred in the sand-spreading device. Therefore, it can be determined that the working state of the sand spreader is that there is a second-level blockage.

[0091] This embodiment achieves accurate classification and graded diagnosis of abnormal states by reasonably setting multiple quantitative standards. This facilitates targeted maintenance and repair of the sand spreader based on specific abnormal working conditions, thereby improving the safety of rail transit vehicle operation and the intelligence and refinement of operation and maintenance management.

[0092] Figure 4 This is a flowchart illustrating a method for detecting the working status of a sand spreader in another embodiment. Based on the above embodiments, this embodiment provides an optional example of a method for detecting the working status of a sand spreader. (Combined with...) Figure 4 The specific implementation process is as follows:

[0093] S401 uses a pressure sensor installed inside the sand pipe of the sand spreader to detect the pressure of sand particles entering the sand pipe at a preset detection frequency, thereby obtaining multiple target pressure signals.

[0094] S402, based on the order in which the target pressure signals are determined, determine the trend of the change of the target pressure signal corresponding to the sand particles entering the sand pipe.

[0095] S403, when the target pressure signals representing the changing trend all belong to the first pressure range and the difference between any two adjacent target pressure signals is less than the preset difference, the working state of the sand spreader is determined to be normal.

[0096] S404, if the trend of change indicates that the pressure is not within the first pressure range and / or the difference between two adjacent target pressure signals is not less than the preset difference, the working state of the sand spreader is determined to be abnormal.

[0097] If the trend of change indicates that the target pressure signal does not fall within the first pressure range and / or the difference between two adjacent target pressure signals is not less than a preset difference, the working state of the sand spreader is determined to be abnormal. This includes: if the trend of change indicates that a first number of consecutive target pressure signals fall within the second pressure range, the working state of the sand spreader is determined to be that the sand spreading amount is less than the preset sand spreading amount; wherein, the upper limit of the second pressure range is less than the lower limit of the first pressure range; if the trend of change indicates that the target pressure signal has a second number of consecutive first-type changes within a first time period, the working state of the sand spreader is determined to be that there is a first-level blockage; wherein, the first-type change is that the target pressure signal increases to the upper limit of the first pressure range within a second time period and then decreases from the upper limit to the lower limit of the first pressure range; if the trend of change indicates that the target pressure signal decreases to any pressure signal lower than the preset pressure signal within a third time period and remains at any pressure signal, the working state of the sand spreader is determined to be that there is a second-level blockage; wherein, the preset pressure signal is less than the lower limit of the second pressure range, and the degree of blockage corresponding to the second-level blockage is higher than the degree of blockage corresponding to the first-level blockage.

[0098] S405, the working status is displayed on the display device of the vehicle where the sand spreader is located.

[0099] For example, this embodiment also includes: obtaining the driving speed of the vehicle where the sand spreader is located, the track slope of the vehicle's driving track, and the track adhesion coefficient between the vehicle and the track; and establishing the correspondence between the working state, driving speed, track slope, and track adhesion coefficient.

[0100] For example, this embodiment also includes: determining the weight and / or volume of sand particles entering the sand pipe based on the target pressure signal; and displaying the weight and / or volume on the display device of the back-end server of the sand spreader.

[0101] For example, this embodiment also includes: displaying the working status on the display device of the back-end server of the sand spreader.

[0102] The specific processes of S401-S405 described above can be found in the description of the above method embodiments. Their implementation principles and technical effects are similar, and will not be repeated here.

[0103] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages in other steps. It is understood that the steps in different embodiments can be freely combined as needed, and all non-contradictory solutions formed by such combinations are within the scope of protection of this application.

[0104] Based on the same inventive concept, this application also provides a sand spreader working state detection device for implementing the sand spreader working state detection method described above. The solution provided by this device is similar to the solution described in the above method. Therefore, the specific limitations of one or more sand spreader working state detection device embodiments provided below can be found in the limitations of the sand spreader working state detection method above, and will not be repeated here.

[0105] In one exemplary embodiment, such as Figure 5 As shown, a sand spreader working status detection device is provided, including: a detection module 510, a determination module 520, and a display module 530, wherein:

[0106] The detection module 510 is used to detect the pressure of sand particles entering the sand pipe by means of a pressure sensor installed in the sand pipe of the sand spreader, according to a preset detection frequency, and obtain multiple target pressure signals.

[0107] The determination module 520 is used to determine the working status of the sand spreader based on the target pressure signals.

[0108] Display module 530 is used to display the working status on the display device of the vehicle where the sand spreader is located.

[0109] In one embodiment, the determining module 520 includes:

[0110] The determination submodule is used to determine the variation trend of the target pressure signal corresponding to the sand particles entering the sand pipe according to the determination order of each target pressure signal; and to determine the working status of the sand spreader according to the variation trend.

[0111] In one embodiment, determining the submodule includes:

[0112] The first determining unit is used to determine the working state of the sand spreader as normal when the target pressure signals representing the changing trend all belong to the first pressure range and the difference between any two adjacent target pressure signals is less than a preset difference.

[0113] The second determining unit is used to determine the working state of the sand spreader as abnormal when the trend of change indicates that it does not belong to the first pressure range and / or the difference between two adjacent target pressure signals is not less than a preset difference.

[0114] In one embodiment, the first determining unit is specifically configured to: determine that the sand applicator's operating state is that the sand application amount is less than a preset sand application amount when the trend of change indicates that a first number of consecutive target pressure signals belong to the second pressure range; wherein, the upper limit of the second pressure range is less than the lower limit of the first pressure range; determine that the sand applicator's operating state is that a first-level blockage exists when the trend of change indicates that the target pressure signal has a second number of consecutive first-type changes within a first time period; wherein, the first-type change is that the target pressure signal increases to the upper limit of the first pressure range within a second time period and then decreases from the upper limit to the lower limit of the first pressure range; determine that the sand applicator's operating state is that a second-level blockage exists when the trend of change indicates that the target pressure signal decreases to any pressure signal below the preset pressure signal within a third time period and remains at any pressure signal; wherein, the preset pressure signal is less than the lower limit of the second pressure range, and the degree of blockage corresponding to the second-level blockage is higher than the degree of blockage corresponding to the first-level blockage.

[0115] In one embodiment, the sand spreader's operational status detection device further includes:

[0116] The acquisition module is used to acquire the driving speed of the vehicle where the sand spreader is located, the track gradient of the vehicle's driving track, and the track adhesion coefficient between the vehicle and the track.

[0117] A module is established to establish the correspondence between working status, travel speed, track gradient, and track adhesion coefficient.

[0118] In one embodiment, the display module 530 is also used to display the working status on the display device of the sand spreader's backend server.

[0119] In one embodiment, the display module 530 is also used to display the weight and / or volume in the display device of the back-end server of the sand spreader.

[0120] Each module in the aforementioned sand spreader's operational status detection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0121] In one exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 6 As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs in the non-volatile storage media. The database stores multiple target pressure signals. The I / O interfaces are used for information exchange between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a method for detecting the working status of a sand spreader.

[0122] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0123] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0124] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0125] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0126] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0127] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0128] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for detecting the working status of a sand spreader, characterized in that, The method includes: The pressure sensor installed in the sand pipe of the sand spreader detects the pressure of sand particles entering the sand pipe at a preset detection frequency, and obtains multiple target pressure signals. The working status of the sand spreader is determined based on the target pressure signals; The operating status is displayed on the display device of the vehicle where the sand spreader is located.

2. The method according to claim 1, characterized in that, Determining the working state of the sand spreader based on each target pressure signal includes: Based on the order in which the target pressure signals are determined, the trend of change of the target pressure signal corresponding to the sand particles entering the sand pipe is determined. The working status of the sand spreader is determined based on the changing trend.

3. The method according to claim 2, characterized in that, Determining the working state of the sand spreader based on the changing trend includes: When the target pressure signals representing the changing trend all fall within the first pressure range and the difference between any two adjacent target pressure signals is less than a preset difference, the working state of the sand spreader is determined to be normal. If the trend of change indicates that the pressure is outside the first pressure range and / or the difference between two adjacent target pressure signals is not less than the preset difference, the working state of the sand spreader is determined to be abnormal.

4. The method according to claim 3, characterized in that, The step of determining the sand spreader's operating state as abnormal when the changing trend indicates that there is a pressure range outside the first pressure range and / or the difference between two adjacent target pressure signals is not less than the preset difference includes: If the trend indicates that a first number of consecutive target pressure signals belong to the second pressure range, the working state of the sand spreader is determined to be that the sand spreading amount is less than the preset sand spreading amount; wherein, the upper limit of the second pressure range is less than the lower limit of the first pressure range. If the trend of change represents a second number of consecutive first-type changes in the target pressure signal within a first time period, the working state of the sand spreader is determined to be that there is a first-level blockage; wherein, the first-type change is that the target pressure signal increases to the upper limit of the first pressure range within the second time period, and then decreases from the upper limit to the lower limit of the first pressure range. If the target pressure signal, which represents the trend of change, drops to any pressure signal below the preset pressure signal within a third time period and remains at that pressure signal, it is determined that the working state of the sand spreader is that there is a second level of blockage; wherein, the preset pressure signal is less than the lower limit of the second pressure range, and the degree of blockage corresponding to the second level of blockage is higher than the degree of blockage corresponding to the first level of blockage.

5. The method according to claim 1, characterized in that, The method further includes: The speed of the vehicle on which the sand spreader is located, the gradient of the vehicle's track, and the coefficient of adhesion between the vehicle and the track are obtained. Establish the correspondence between the working state, the travel speed, the track gradient, and the track adhesion coefficient.

6. The method according to claim 1, characterized in that, The method further includes: The working status is displayed on the display device of the back-end server of the sand spreader.

7. The method according to any one of claims 1-6, characterized in that, The method further includes: Based on the target pressure signal, determine the weight and / or volume of the sand particles entering the lower sand pipe; The weight and / or volume are displayed on the display device of the back-end server of the sand spreader.

8. A device for detecting the working status of a sand spreader, characterized in that, The device includes: The detection module is used to detect the pressure of sand particles entering the sand pipe by means of a pressure sensor installed in the sand pipe of the sand spreader, according to a preset detection frequency, and obtain multiple target pressure signals. The determination module is used to determine the working status of the sand spreader based on the target pressure signals; The display module is used to display the working status on the display device of the vehicle where the sand spreader is located.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1-7.

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