Intelligent matching system for press fitting of bearings of motor train unit

Abstract

The invention relates to the technical field of bearing selection and assembly, and provides a motor train unit bearing press fitting intelligent selection and assembly system which comprises a three-dimensional repository provided with multiple layers of shuttle rails and shuttle vehicles moving along the shuttle rails. The first elevator is arranged on the warehouse-out side of the three-dimensional repository and used for communicating the three-dimensional repository with the conveying frame; the second elevator is arranged on the storage side of the three-dimensional repository and is provided with a first lifting structure and a second lifting structure which operate independently; the conveying frame is connected with the first lifting machine and is provided with two horizontal conveying devices which are vertically arranged; the number of the assembling stations is multiple, the assembling stations are provided with assembling lifting frames, and the assembling lifting frames communicate with the two horizontal conveying devices of the conveying frame; the detection mechanism is arranged on the storage side of the three-dimensional storage warehouse; and the automatic control platform is used for controlling the shuttle vehicle, the first lifter, the second lifter, the conveying frame, the assembly station and the detection station to work.

Description

Technical Field

[0001] The present application relates to the technical field of bearing selection, and in particular to a non-contact self-calibration current-voltage combination sensor and a calibration system. Background Art

[0002] Wheelset bearings are important parts of railway locomotives and vehicles. The selection and press-fitting of wheelset bearings are important processes in the maintenance of locomotives and vehicles. The press-fitting process is usually carried out with a press-fitting machine, while the inspection, storage, selection and transportation of bearings are basically carried out by manual recording and handling. At the same time, it is troublesome to measure the size of the bearings after re-inspection in the warehouse. The size of the bearings must be measured after being kept at the same temperature as the wheel to be pressed for 8 hours. There are many types of bearing measurement sizes. Due to the matching of the wheels to be pressed, there will be differences in the detailed sizes between different bearings. If only manual recording, testing and handling are used, if multiple sets of bearings are pressed at the same time, it will not only consume a lot of manpower and have low work efficiency, but also a large amount of measurement and testing data will affect the rationality and accuracy of the selected bearings, which may easily cause the bearings to fall and cause damage to the bearings or injuries. Summary of the invention

[0003] The purpose of the present application is to provide an intelligent selection and matching system for pressing and fitting bearings of EMUs, which can realize automatic inspection, warehousing, selection and transportation of bearings.

[0004] The above application objectives of this application are achieved through the following technical solutions:

[0005] An intelligent selection system for pressing and fitting bearings of a train set, the system comprising:

[0006] A three-dimensional storage warehouse has a storage side and a storage side, and the three-dimensional storage warehouse is equipped with multi-layer shuttle tracks and shuttle vehicles moving along the shuttle tracks;

[0007] The first elevator is arranged at the outbound side of the three-dimensional storage warehouse and is used to connect the three-dimensional storage warehouse and the conveying rack;

[0008] The second lift is arranged at the storage side of the three-dimensional storage warehouse and is provided with a first lifting structure and a second lifting structure which operate independently;

[0009] A conveying frame connected to the first elevator and equipped with two vertically arranged horizontal conveying devices;

[0010] There are multiple assembly stations, each of which is equipped with an assembly lifting frame, and the assembly lifting frame is connected to two horizontal conveying devices of the conveying frame;

[0011] The detection mechanism is arranged at the storage side of the three-dimensional storage warehouse;

[0012] The automatic control platform is used to control the shuttle, the first elevator, the second elevator, the conveyor frame, and the assembly station and the inspection station.

[0013] In a preferred embodiment, the bearings are configured with corresponding pallets, and the shuttle moves the bearings through the pallets.

[0014] In a preferred embodiment, the pallet is provided with a marking chip or a marking barcode, and the corresponding bearing information data is obtained through the marking chip or the marking barcode.

[0015] In a preferred embodiment, the storage side is provided with a first conveying rack and a second transport rack respectively connected to the first lifting structure and the second lifting structure.

[0016] In a preferred embodiment, the automatic control platform comprises:

[0017] A data acquisition module is used to acquire wheelset selection data of an assembly station;

[0018] A data storage module storing bearing storage data, wherein the bearing storage data includes bearing information data and bearing measurement data, wherein the bearing measurement data is data corresponding to the bearing characteristics obtained by measuring the bearing at predetermined intervals;

[0019] The control module is used to select a matching bearing from the bearing storage data according to the wheelset matching data, and output a matching instruction to control the shuttle vehicle to transport the matching bearing to the assembly station.

[0020] In a preferred embodiment, the bearing information data includes a bearing number, storage time and storage location, and the shuttle vehicle selects a bearing according to the storage location.

[0021] In a preferred embodiment, the bearing measurement data includes measurement time and measurement parameters, and the control module selects a matching bearing according to the wheelset matching data, measurement time and measurement parameters.

[0022] In a preferred embodiment, the method in which the control module selects a matching bearing according to the wheelset matching data, the measurement time and the measurement parameters includes:

[0023] Selecting a first bearing set according to the wheelset selection data and the measurement parameters;

[0024] The bearing whose measurement time is the shortest from the current time is selected from the first bearing set as the matching bearing.

[0025] In a preferred embodiment, the method further comprises:

[0026] The bearings whose first bearing concentrated measurement time is longer than the preset time from the current time are taken as the candidate group, and the bearings whose measurement time is shorter than the preset time from the current time are taken as the matching group;

[0027] If the candidate group is not empty, the bearing with the shortest measurement time from the current time is selected from the candidate group as the matching bearing;

[0028] If the matching group is empty, the bearing with the shortest measurement time from the current time is selected from the alternative group and sent to the testing agency for testing. If the updated data obtained by the testing agency matches the wheelset matching data, the bearing is used as the matching bearing.

[0029] In a preferred embodiment, the method also includes, if the matching group is empty and the data obtained from the re-test of the bearing in the alternative group with the shortest measurement time from the current time does not match the wheelset matching data, outputting a prompt signal and outputting the waiting time required for the test based on the number of remaining bearings in the alternative group.

[0030] In summary, this application includes the following beneficial technical effects:

[0031] 1. It realizes the simultaneous storage and selection of multiple groups of bearings. When the bearings are stored, the bearing parameters are first detected and stored in the three-dimensional storage warehouse, and the automatic control platform controls each bearing to be detected regularly. When it is necessary to select the bearings, it is only necessary to select the corresponding bearings from the three-dimensional warehouse. Compared with the existing technology, the selected bearings and the wheels to be pressed are intelligently sent to the bearing room at the same time and measured and assembled again after a predetermined time, which can realize the simultaneous assembly of multiple groups;

[0032] 2. The matching accuracy between the bearing and the wheel to be pressed is improved. Since multiple groups of bearings can be stored at the same time, appropriate bearings can be selected for assembly according to the wheel to be pressed. Compared with the low selection range of bearings in the prior art, the matching accuracy of bearing press fitting is improved;

[0033] 3. Improve the efficiency of wheel set press fitting. By configuring a three-dimensional storage warehouse, conveyor racks, shuttles, testing mechanisms and assembly stations, the timing detection and matching of bearings can be automatically realized, which improves the accuracy of bearing matching while reducing labor costs and time costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the bearing press-fitting intelligent matching system in the embodiment of the present application.

[0035] Figure 2 It is a top view schematic diagram of the overall structure of the bearing press-fitting intelligent matching system in the embodiment of the present application.

[0036] Figure 3It is a schematic diagram of the structure of the conveying rack and the assembly station in the embodiment of the present application.

[0037] Figure 4 It is a schematic diagram of the structure of the discharge conveyor platform and the assembly station in the embodiment of the present application.

[0038] Figure 5 This is a system diagram of the automatic control platform of an embodiment of the present application.

[0039] Figure 6 This is a topology diagram of the automatic control platform system of the embodiment of the present application.

[0040] Explanation of the accompanying drawings: 1. Three-dimensional storage warehouse; 11. Shuttle track; 12. Shuttle car; 13. First rotating conveyor platform; 2. First elevator; 3. Second elevator; 31. First lifting structure; 311. First transport rack; 312. First transfer platform; 32. Second lifting structure; 321. Second transport rack; 322. Second transfer platform; 4. Conveyor rack; 41. Horizontal conveyor device; 5. Assembly station; 51. Assembly lifting rack; 52. Discharging conveyor platform; 6. Detection mechanism; 7. Automatic control platform; 71. Data acquisition module; 72. Data storage module; 73. Control module; 8. Feed rack; 9. Pallet. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings to Figures 1 to 5 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0042] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0043] The present application provides an intelligent matching system for bearing press-fitting of EMUs, which integrates traditional bearing storage, bearing detection and bearing press-fitting matching, thereby realizing automatic inspection, storage, matching and transportation of bearings, improving the efficiency of bearing press-fitting and the accuracy of bearing matching. Figure 1-Figure 6 The technical solution of this application is elaborated in detail.

[0044] The optional system includes a three-dimensional storage warehouse, a first elevator, a second elevator, a conveying frame, an assembly station, a detection mechanism and an automatic control platform.

[0045] Reference Figure 1 and Figure 2 The three-dimensional storage warehouse is composed of two single-row three-dimensional warehouses. A shuttle track is configured between the two single-row three-dimensional warehouses. A shuttle vehicle runs in the shuttle track. The shuttle vehicle is an AGV car. The single-row three-dimensional warehouse includes multiple storage racks. Each storage rack is configured with a shuttle track, that is, the shuttle track has multiple layers. Each storage rack of the single-row three-dimensional warehouse has multiple bearing storage positions arranged in a single row. The shuttle vehicle moves to the corresponding bearing storage position through the shuttle track to store or take out the bearing.

[0046] The first elevator is arranged at the outbound side of the stereoscopic warehouse, and the stereoscopic storage warehouse is connected to the conveying rack through the first elevator. When the shuttle car takes the bearing, it transports the bearing to the first elevator, and then sends the bearing to the conveying rack through the first elevator. The conveying rack is equipped with multiple assembly stations, and the assembly stations assemble the bearing and the press wheel.

[0047] The second elevator is located at the entrance side of the three-dimensional storage warehouse. Each shuttle track is configured with a first rotating conveying platform at the end of the second elevator. The second elevator includes a first lifting structure and a second lifting structure. The first lifting structure and the second lifting structure are respectively located on both sides of the first rotating conveying platform. When the shuttle moves to the first rotating conveying platform, the bearing is transported to the first lifting structure or the second lifting structure through the first rotating conveying platform to complete the output of the bearing, or the shuttle receives the bearing from the first lifting structure and the second lifting structure through the first rotating conveying platform to complete the storage of the bearing.

[0048] The first lifting structure and the second lifting structure are respectively connected to the first transport frame and the second transport frame, the ends of the first transport frame and the second transport frame are respectively connected to the first transfer platform and the second transfer platform, one side of the first transfer platform is connected to the feeding frame, and the feeding frame is equipped with a weighing device.

[0049] When the bearings need to be put into storage, they are placed on the feed rack, which transports the bearings to the first transfer platform. During the process of the feed rack transporting the bearings, the bearings are automatically weighed by the weighing device, and an alarm is issued when the bearing weight does not meet the standard. The bearings that have been weighed are transferred to the first transport rack through the first transfer platform, and then transported to the first lifting structure through the first transport rack; or the bearings that have been weighed are transferred to the second transfer platform through the first transfer platform, and the second transfer platform transfers the bearings to the second transport rack, and the second transport rack transports the bearings to the second lifting structure.

[0050] In addition, the detection mechanism is configured on the storage side of the three-dimensional storage warehouse. Since the bearing must be kept at the same temperature as the wheel to be pressed for 8 hours before the size is measured, when the bearing reaches the predetermined time after being stored, the shuttle car will transport the bearing to the second elevator. The first lifting structure and the second lifting structure can store and measure the bearings respectively according to the needs, that is, the bearings to be stored are transported to the first rotary table of the corresponding layer by the first lifting structure, and the bearings to be tested are transported to the second transfer platform by the second lifting structure; or the bearings to be tested are transported to the first transfer platform by the first lifting structure, and the bearings to be stored are transported to the first rotary table of the corresponding layer by the second lifting structure. The detection mechanism automatically obtains the bearing to be tested from the first transfer platform or the second transfer platform through a manipulator.

[0051] Reference Figure 3 and Figure 4 , the conveyor frame includes two vertically arranged horizontal conveying devices, the assembly station is equipped with an assembly lifting frame, the assembly lifting frame is connected to the two horizontal conveying devices, and each assembly lifting frame is equipped with a discharge conveying platform at the bottom. The bearings are equipped with one-to-one corresponding pallets. The horizontal conveying device located above is used to transport the pallets and bearings to the corresponding assembly station. The assembly lifting frame of the assembly station sends the pallets and bearings to the discharge conveying platform, and the staff takes the bearings through the discharge conveying platform; when the bearings are taken, the empty pallets are transported to the horizontal conveying device located below through the discharge conveying platform and the assembly lifting frame. The horizontal conveying device located below transports the empty pallets to the three-dimensional storage warehouse, and the empty pallets are sent to the bearing storage position of the three-dimensional storage warehouse through the shuttle car. The horizontal conveying devices distributed above and below realize the separate transportation of bearings and empty pallets, further improving the efficiency of bearing assembly.

[0052] In a preferred example, each shuttle track is configured with two shuttles. When one shuttle fails, the empty pallet or bearing can be transported by the other shuttle.

[0053] The above is the structural component of the matching system. When the bearing is put into storage, the bearing is first weighed and measured. When the bearing needs to be pressed, the corresponding bearing is selected for press installation according to the wheelset matching data. The automatic control platform is used to control the shuttle, the first elevator, the second elevator, the conveyor frame, the assembly station and the inspection station, so as to complete the storage, inspection, matching and transportation of the bearing.

[0054] The pallet is equipped with a marking chip or a marking barcode, and when the bearing is weighed or measured, the corresponding bearing information data is obtained through the marking chip or the marking barcode. In the present application, it is preferred that the pallet is equipped with a marking chip, and the shuttle is equipped with a close-range identification device, and the bearing information data of the corresponding bearing in the pallet is obtained through the marking chip during the movement of the shuttle.

[0055] Reference Figure 5 and Figure 6 :

[0056] The automatic control platform comprises:

[0057] A data acquisition module is used to acquire wheelset selection data of an assembly station;

[0058] A data storage module storing bearing storage data, wherein the bearing storage data includes bearing information data and bearing measurement data, wherein the bearing measurement data is data corresponding to the bearing characteristics obtained by measuring the bearing at predetermined intervals;

[0059] The control module is used to select a matching bearing from the bearing storage data according to the wheelset matching data, and output a matching instruction to control the shuttle vehicle to transport the matching bearing to the assembly station.

[0060] After the bearing is weighed and tested by the detection mechanism, the weight and the test data are uploaded to the automatic control platform and stored through the automatic control platform. The bearing information data stored in the automatic control platform includes the bearing storage time, bearing number, bearing weight, storage location, etc. The storage location represents the storage location of the bearing in the three-dimensional storage warehouse; the bearing measurement data stored in the automatic control platform includes the measurement parameters and measurement time related to the bearing size measured by the detection mechanism when the bearing is detected, such as the data of the journal, dust plate seat, oil retaining ring, etc. The bearing information data is entered into the marking chip in the pallet and the data storage module of the automatic control platform at the same time when the bearing is put into storage, and the measurement time is updated to the automatic control platform at the same time when the detection mechanism detects the bearing; the measurement parameters are updated to the automatic control platform after each detection mechanism detects the bearing. In a preferred example, each bearing is measured every 8 hours.

[0061] A wheelset detection mechanism is provided in the bearing room. After the wheel to be pressed enters the bearing room and stands still for a predetermined time, the wheels to be pressed are firstly detected by the wheelset detection mechanism to obtain the wheelset matching data, and the wheelset matching data is uploaded to the automatic control platform. After the data acquisition module of the automatic control platform obtains the wheelset matching data, the control module selects the bearing matching the wheelset matching data from the bearing storage data according to the wheelset matching data, and then the control module sends a transport instruction to control the shuttle car to transport the corresponding bearing to the first elevator, the first elevator sends the bearing to the upper horizontal conveying device of the conveying frame, the upper horizontal conveying device sends the bearing to the corresponding assembly station, and the assembly station sends the bearing through the discharge conveying platform.

[0062] It should be noted that after the shuttle receives the transport instruction from the control module, it first moves to the corresponding bearing position according to the storage position, and then identifies the bearing information data stored in the pallet through the close-range recognition device. If the bearing information data stored in the pallet does not match the bearing information data of the bearing to be transported, a storage error prompt is sent to the control module, and the control module visually displays the storage error prompt.

[0063] Furthermore, the control module selects a matching bearing according to the wheelset matching data, the measurement time and the measurement parameters. The specific method for the control module to select a matching bearing is as follows:

[0064] Step S101: selecting a first bearing set according to wheelset matching data and measurement parameters;

[0065] Step S102: Selecting a bearing whose measurement time is the shortest from the current time from the first bearing set as a matching bearing.

[0066] Since in the present application, the bearing does not need to enter the bearing room at the same time as the wheel to be pressed, the number of bearings stored in the three-dimensional storage warehouse is greater than that in the prior art, and the measurement time of the bearings is also different from each other. The process of selecting a matching bearing from the first bearing set in step S102 needs to refer to the measurement time of the bearing, which is as follows:

[0067] Step S1021: The bearings whose first bearing concentrated measurement time has a time length from the current time greater than a preset time length are selected as a candidate group, and the bearings whose measurement time has a time length from the current time less than the preset time length are selected as a matching group;

[0068] Step S1022: If the candidate group is not empty, select the bearing whose measurement time is the shortest from the current time from the candidate group as the matching bearing;

[0069] Step S1023: If the matching group is empty, select the bearing with the shortest measurement time from the alternative group and send it to the detection mechanism for detection. If the updated data obtained by the detection mechanism matches the wheelset matching data, the bearing will be used as the matching bearing.

[0070] The preset time is 8 hours. Generally, the bearings stored in the three-dimensional storage warehouse need to be tested again after the time is 8 hours. In step S1023, if the matching group is empty, it means that there is no bearing that matches the wheel to be pressed among the bearings that meet the detection time requirements. At this time, it is necessary to select matching bearings from the bearings that have been stored for 8 hours and have not been tested again, that is, select matching bearings from the alternative group. At this time, if there are multiple bearings that need to be tested at the same time in the three-dimensional storage warehouse, the bearings in the alternative group among the bearings to be tested will be tested first.

[0071] It should be noted that each bearing needs to be stored in the bearing room for 8 hours before assembly. Therefore, if the storage time of the matching bearing is less than 8 hours, the bearing will be discarded.

[0072] Furthermore, if the matching group is empty, and the data obtained from the re-test of the bearing in the alternative group with the shortest measurement time from the current time does not match the wheelset matching data, a prompt signal is output, and the waiting time required for the test is output based on the number of remaining bearings in the alternative group.

[0073] By adopting the above technical scheme, on the one hand, it is possible to store and select multiple groups of bearings at the same time. When the bearings are stored, the bearing parameters are first detected and stored in the three-dimensional storage warehouse, and the automatic control platform is used to control each bearing to be detected at a fixed time. When the bearings need to be selected, it is only necessary to select the corresponding bearings from the three-dimensional warehouse. Compared with the prior art, the selected bearings and the wheels to be pressed are intelligently sent into the bearing room at the same time and measured and assembled again after a predetermined time, which can realize the simultaneous assembly of multiple groups; on the second hand, the matching accuracy between the bearings and the wheels to be pressed is improved. Since multiple groups of bearings can be stored at the same time, appropriate bearings can be selected for assembly according to the wheels to be pressed. Compared with the low selection range of bearings in the prior art, the accuracy of bearing press selection is improved; on the third hand, the efficiency of wheel set press installation is improved. By configuring a three-dimensional storage warehouse and a conveyor frame, a shuttle car, a detection mechanism and an assembly station, the timing detection and matching of the bearings can be automatically realized, which improves the accuracy of bearing matching while reducing labor costs and time costs.

[0074] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent selection system for press-fitting bearings of EMUs, characterized in that: The system comprises: A three-dimensional storage warehouse has an inbound side and an outbound side, and the three-dimensional storage warehouse is equipped with multi-layer shuttle tracks and shuttle vehicles moving along the shuttle tracks; The first elevator is arranged at the outbound side of the three-dimensional storage warehouse and is used to connect the three-dimensional storage warehouse and the conveying rack; The second lift is arranged at the storage side of the three-dimensional storage warehouse and is provided with a first lifting structure and a second lifting structure which operate independently; A conveying frame connected to the first elevator and equipped with two vertically arranged horizontal conveying devices; There are multiple assembly stations, each of which is equipped with an assembly lifting frame, and the assembly lifting frame is connected to two horizontal conveying devices of the conveying frame; The detection mechanism is arranged at the storage side of the three-dimensional storage warehouse; The automatic control platform is used to control the shuttle, the first elevator, the second elevator, the conveyor frame, and the assembly station and the inspection station.

2. According to claim 1, the intelligent selection system for press-fitting of EMU bearings is characterized in that: The bearings are configured with a one-to-one corresponding tray, and the shuttle moves the bearings through the tray.

3. According to claim 2, the intelligent selection system for EMU bearing press-fitting is characterized in that: The pallet is configured with a marking chip or a marking barcode, and corresponding bearing information data is obtained through the marking chip or the marking barcode.

4. The intelligent selection system for press-fitting of EMU bearings according to claim 1 is characterized in that: The storage side is provided with a first conveying frame and a second transport frame respectively connected to the first lifting structure and the second lifting structure.

5. An intelligent selection system for press-fitting of EMU bearings according to any one of claims 1 to 4, characterized in that: The automatic control platform comprises: A data acquisition module is used to acquire wheelset selection data of an assembly station; A data storage module storing bearing storage data, wherein the bearing storage data includes bearing information data and bearing measurement data, wherein the bearing measurement data is data corresponding to the bearing characteristics obtained by measuring the bearing at predetermined intervals; The control module is used to select a matching bearing from the bearing storage data according to the wheelset matching data, and output a matching instruction to control the shuttle vehicle to transport the matching bearing to the assembly station.

6. The intelligent selection system for press-fitting of EMU bearings according to claim 5 is characterized in that: The bearing information data includes bearing number, storage time and storage location, and the shuttle vehicle selects the bearing according to the storage location.

7. The intelligent selection system for press-fitting of EMU bearings according to claim 5 is characterized in that: The bearing measurement data includes measurement time and measurement parameters, and the control module selects a matching bearing according to the wheelset matching data, the measurement time and the measurement parameters.

8. The intelligent selection system for press-fitting of EMU bearings according to claim 7 is characterized in that: The method for the control module to select a matching bearing according to the wheelset matching data, the measurement time and the measurement parameters includes: Selecting a first bearing set according to the wheelset selection data and the measurement parameters; The bearing whose measurement time is the shortest from the current time is selected from the first bearing set as the matching bearing.

9. The intelligent selection system for press-fitting of EMU bearings according to claim 8 is characterized in that: The method further comprises: The bearings whose first bearing concentrated measurement time is longer than the preset time from the current time are taken as the candidate group, and the bearings whose measurement time is shorter than the preset time from the current time are taken as the matching group; If the candidate group is not empty, the bearing with the shortest measurement time from the current time is selected from the candidate group as the matching bearing; If the matching group is empty, the bearing with the shortest measurement time from the current time is selected from the alternative group and sent to the testing agency for testing. If the updated data obtained by the testing agency matches the wheelset matching data, the bearing is used as the matching bearing.

10. The intelligent selection system for press-fitting of EMU bearings according to claim 9 is characterized in that: The method also includes, if the matching group is empty and the data obtained by retesting the bearing in the alternative group with the shortest measurement time from the current time does not match the wheelset matching data, outputting a prompt signal and outputting the waiting time required for the test based on the number of remaining bearings in the alternative group.

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