An intelligent matching system for press-fitting EMU bearings

Abstract

This application relates to the technical field of bearing selection and matching. The purpose of this application is to provide an intelligent selection and matching system for pressing and installing EMU bearings. The system includes: a three-dimensional storage library, which is configured with multiple layers of shuttle tracks and shuttle cars that move along the shuttle tracks; a first elevator, which is configured on the outbound side of the three-dimensional storage library and is used to connect the three-dimensional storage library and the conveying rack; a second elevator, which is configured on the inbound side of the three-dimensional storage library and is configured with an independently operating first lifting structure and a second lifting structure; a conveying rack, which is connected to the first elevator and is configured with two horizontally arranged horizontal conveying devices arranged vertically; multiple assembly workstations, which are configured with assembly lifting frames, and the assembly lifting frames are connected to the two horizontal conveying devices of the conveying rack; a detection mechanism, which is configured on the inbound side of the three-dimensional storage library; an automatic control platform, which is used to control the shuttle cars, the first elevator, the second elevator, the conveying rack, as well as the assembly workstations and the detection workstations.

Description

Technical Field

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

[0002] The axle box bearing is an important component of railway locomotives and vehicles. The selection and press-fitting of axle box bearings are important processes in locomotive and vehicle maintenance. The press-fitting process is usually carried out by a press-fitting machine, while the inspection, storage, selection, and transportation of bearings are basically carried out in the way of manual recording and handling. At the same time, it is troublesome to measure the size during the re-inspection when the bearings are put into storage. The bearings need to be at the same temperature as the wheels to be press-fitted for 8 hours before measuring the size. There are many types of bearing measurement sizes, and there will also be differences in detailed sizes between different bearings due to the cooperation with the wheels to be press-fitted. Only using manual recording, detection, and handling, if multiple groups of bearings are press-fitted at the same time, not only will it consume a lot of labor and have low work efficiency, but also a large amount of measurement and detection data will affect the rationality and accuracy of the selected bearings, and it is easy to cause the bearings to fall and lead to damage to the bearings or injury accidents. Summary of the Invention

[0003] The purpose of this application is to provide an intelligent selection and matching system for press-fitting axle box bearings of EMUs, which can realize the automatic inspection, storage, selection, and transportation of bearings.

[0004] The above application purpose of this application is achieved through the following technical solutions:

[0005] An intelligent selection and matching system for press-fitting axle box bearings of EMUs, the system includes:

[0006] A three-dimensional storage warehouse, having an inbound side and an outbound side, the three-dimensional storage warehouse is configured with multiple layers of shuttle tracks and shuttle cars moving along the shuttle tracks;

[0007] A first elevator, configured on the outbound side of the three-dimensional storage warehouse, for connecting the three-dimensional storage warehouse and the conveying rack;

[0008] A second elevator, configured on the inbound side of the three-dimensional storage warehouse, and configured with an independently operating first lifting structure and a second lifting structure;

[0009] A conveying rack, connected to the first elevator, and configured with two horizontally arranged horizontal conveying devices arranged vertically;

[0010] Assembly stations, configured with multiple ones, the assembly stations are configured with assembly lifting frames, and the assembly lifting frames connect the two horizontal conveying devices of the conveying rack;

[0011] A detection mechanism, configured on the inbound side of the three-dimensional storage warehouse;

[0012] An automatic control platform is used to control the operation of a shuttle car, a first elevator, a second elevator, a conveying rack, an assembly station, and an inspection station.

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

[0014] In a preferred embodiment, the pallets are configured with marking chips or marking barcodes, and the corresponding bearing information data is obtained through the marking chips or marking barcodes.

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

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

[0017] A data acquisition module for acquiring the wheel pair matching data of the assembly station;

[0018] A data storage module storing bearing storage data, where the bearing storage data includes bearing information data and bearing measurement data, and the bearing measurement data is the data of the corresponding bearing's own characteristics measured at regular intervals for the bearing;

[0019] A control module for selecting a matching bearing from the bearing storage data according to the wheel pair matching data and outputting a matching instruction to control the shuttle car to convey the matching bearing to the assembly station.

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

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

[0022] In a preferred embodiment, the method for the control module to select a matching bearing according to the wheel pair matching data, the measurement time, and the measurement parameters includes:

[0023] Select a first set of bearings according to the wheel pair matching data and the measurement parameters;

[0024] Select the bearing with the shortest measurement time from the first set of bearings as the matching bearing.

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

[0026] Take the bearings whose duration from the first bearing centralized measurement time to the current time is greater than the preset duration as the alternative group, and take the bearings whose duration from the measurement time to the current time is less than the preset duration as the matching group;

[0027] If the alternative group is not empty, select the bearing with the shortest duration from the measurement time to the current time in the alternative group as the matching bearing;

[0028] If the matching group is empty, select the bearing with the shortest duration from the measurement time to the current time in the alternative group and transport it to the testing agency for testing. If the updated data obtained by the testing agency matches the wheel set matching data, then take this bearing as the matching bearing.

[0029] In a preferred embodiment, the method further includes that if the matching group is empty, and the data obtained by re - testing the bearing with the shortest duration from the measurement time to the current time in the alternative group does not match the wheel set matching data, then output a prompt signal, and output the pending duration required for testing according to the remaining number of bearings in the alternative group.

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

[0031] 1. It realizes the simultaneous warehousing and matching of multiple groups of bearings. When the bearings are warehoused, first detect the bearing parameters and store them in the three - dimensional storage library, and control each bearing to be detected regularly through the automatic control platform. When bearings need to be matched, just select the corresponding bearings from the three - dimensional library. Compared with the prior art where the matched bearings and the wheels to be press - fitted are sent into the bearing room simultaneously and measured again after a predetermined time, it can achieve multiple - group assembly simultaneously;

[0032] 2. It improves the matching accuracy between the bearings and the wheels to be press - fitted. Since multiple groups of bearings can be stored simultaneously, appropriate bearings can be selected for assembly according to the wheels to be press - fitted. Compared with the low selection range of bearings in the prior art, it improves the accuracy of bearing press - fitting and matching;

[0033] 3. It improves the wheel set press - fitting efficiency. By configuring a three - dimensional storage library, conveyor racks, shuttle cars, testing agencies and assembly stations, it can automatically realize the regular detection and matching of bearings. While improving the accuracy of bearing matching, it also reduces the labor cost and time cost. 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 an 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 an embodiment of the present application.

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

[0037] Figure 4 It is a schematic structural diagram of the discharging conveying table and the assembly station in the embodiment of the present application.

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

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

[0040] Explanation of reference numerals: 1, three-dimensional storage library; 11, shuttle track; 12, shuttle car; 13, first rotary conveying table; 2, first elevator; 3, second elevator; 31, first lifting structure; 311, first conveying rack; 312, first transfer table; 32, second lifting structure; 321, second conveying rack; 322, second transfer table; 4, conveying rack; 41, horizontal conveying device; 5, assembly station; 51, assembly lifting rack; 52, discharging conveying table; 6, detection mechanism; 7, automatic control platform; 71, data acquisition module; 72, data storage module; 73, control module; 8, feeding rack; 9, pallet. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the accompanying drawings of the specification Figures 1 to 5 to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope 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 simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after, unless otherwise specified.

[0043] The present application provides an intelligent matching system for pressing and assembling EMU bearings. The matching system integrates traditional bearing storage, bearing detection, and bearing pressing and matching, so as to realize automatic inspection, warehousing, matching, and conveying of bearings, improving the bearing pressing efficiency and the accuracy of bearing matching at the same time. To achieve the above objectives, the following will combine the accompanying drawings of the specification Figures 1 - 6 to elaborate on the technical solutions of the present application in detail.

[0044] The selection and matching system includes a three-dimensional storage library, a first elevator, a second elevator, a conveying rack, an assembly station, a detection mechanism, and an automatic control platform.

[0045] Referring to Figure 1 and Figure 2 , the three-dimensional storage library is composed of two single-row three-dimensional libraries. A shuttle track is configured between the two single-row three-dimensional libraries. An AGV car runs in the shuttle track. The single-row three-dimensional library includes multiple layers of storage racks, and each layer of storage rack is configured with a shuttle track, that is, there are multiple layers of shuttle tracks. Each layer of the storage rack of the single-row three-dimensional library is arranged in a single column with multiple bearing storage positions. The shuttle car moves to the corresponding bearing storage position through the shuttle track to store or retrieve the bearing.

[0046] The first elevator is configured on the outbound side of the three-dimensional library. The three-dimensional storage library is connected to the conveying rack through the first elevator. When the shuttle car picks up the bearing, it transports the bearing to the first elevator and sends the bearing to the conveying rack through the first elevator. The conveying rack is configured with multiple assembly stations, and the assembly stations perform assembly operations on the bearing and the press-fitting wheel.

[0047] The second elevator is located on the inbound side of the three-dimensional storage library. A first rotary conveyor is configured at the end of each shuttle track on 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 rotary conveyor. When the shuttle car moves to the first rotary conveyor, the bearing is transported to the first lifting structure or the second lifting structure through the first rotary conveyor to complete the output of the bearing, or the shuttle car receives the bearing entering the warehouse from the first lifting structure and the second lifting structure through the first rotary conveyor to complete the warehousing of the bearing.

[0048] The first lifting structure and the second lifting structure are respectively connected with a first transport rack and a second transport rack. The ends of the first transport rack and the second transport rack are respectively connected with a first transfer platform and a second transfer platform. One side of the first transfer platform is connected with a feeding rack, and the feeding rack is configured with a weighing device.

[0049] When the bearing needs to be warehoused, the bearing is placed on the feeding rack. The feeding rack transports the bearing to the first transfer platform. During the process of the feeding rack transporting the bearing, the bearing is automatically weighed by the weighing device, and an alarm is issued when the weight of the bearing does not meet the standard. The bearing with qualified weight is 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 bearing with qualified weight is transferred to the second transfer platform through the first transfer platform, and the second transfer platform transfers the bearing to the second transport rack, and the second transport rack transports the bearing to the second lifting structure.

[0050] In addition, the detection mechanism is configured on the warehousing side of the three-dimensional storage library. Since the bearing needs to be at the same temperature as the wheel to be press-fitted for 8 hours before measuring the size, when the bearing reaches the predetermined time after warehousing, the bearing is transported to the second elevator by the shuttle car. The first lifting structure and the second lifting structure can respectively carry out the warehousing of the bearing and the measurement of the bearing according to requirements, that is, the bearing to be warehoused is transported to the first rotating conveyor on the corresponding layer by the first lifting structure, and the bearing to be detected is transported to the second transfer table by the second lifting structure; or the bearing to be detected is transported to the first transfer table by the first lifting structure, and the bearing to be warehoused is transported to the first rotating conveyor on the corresponding layer by the second lifting structure. The detection mechanism automatically obtains the bearing to be detected from the first transfer table or the second transfer table through a manipulator.

[0051] Referring to Figure 3 and Figure 4 , the conveying rack includes two horizontally arranged horizontal conveying devices arranged vertically. The assembly station is configured with an assembly lifting rack, and the assembly lifting rack communicates with the two horizontal conveying devices, and an unloading conveying table is configured at the bottom of each assembly lifting rack. The bearing is provided with a corresponding tray. The upper horizontal conveying device is used to transport the tray and the bearing to the corresponding assembly station. The assembly lifting rack at the assembly station sends the tray and the bearing to the unloading conveying table, and the staff takes the bearing through the unloading conveying table; when the bearing is taken, the empty tray is transported to the lower horizontal conveying device through the unloading conveying table and the assembly lifting rack, and the lower horizontal conveying device transports the empty tray to the three-dimensional storage library, and the empty tray is sent to the bearing storage position in the three-dimensional storage library through the shuttle car. The horizontally arranged conveying devices distributed up and down realize the separate transportation of the bearing and the empty tray, further improving the efficiency of bearing assembly.

[0052] In a preferred example, each shuttle track is configured with two shuttle cars. When one shuttle car fails, the other shuttle car can be used to transport the empty tray or the bearing.

[0053] The above introduction is about the structural components of the selection system. When the bearing is warehoused, the bearing is first weighed and measured. When bearing press-fitting is required, the corresponding bearing is selected for press-fitting according to the wheel set selection data. The automatic control platform is used to control the shuttle car, the first elevator, the second elevator, the conveying rack, and the assembly station and the detection station to work, so as to complete the warehousing, detection, selection, and transportation of the bearing.

[0054] Among them, the tray is provided with a marking chip or a marking bar code, and after the bearing is weighed or measured, the corresponding bearing information data is obtained through the marking chip or the marking bar code. In this application, it is preferably that the tray is provided with a marking chip, and the shuttle car is provided with a near-field identification device. During the movement of the shuttle car, the bearing information data of the corresponding bearing in the tray is obtained through the marking chip.

[0055] Reference Figure 5 and Figure 6 :

[0056] The automatic control platform includes:

[0057] A data acquisition module, configured to acquire the wheel set matching data of the assembly station;

[0058] A data storage module, storing bearing storage data, where the bearing storage data includes bearing information data and bearing measurement data, and the bearing measurement data is the data corresponding to the characteristics of the bearing itself measured at a predetermined time interval for the bearing;

[0059] A control module, configured to select a matching bearing from the bearing storage data according to the wheel set matching data, and output a matching instruction to control the shuttle car to transport the matching bearing to the assembly station.

[0060] After the bearing is weighed and detected by the detection mechanism, the weight and the detected 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 warehousing time, bearing number, bearing weight, storage location, etc., and the storage location represents the storage location of the bearing in the three-dimensional storage library; the bearing measurement data stored in the automatic control platform includes the measurement parameters related to the bearing size and the measurement time measured by the detection mechanism for the bearing, and the measurement parameters such as journal, dust guard seat, oil baffle ring, etc. data. Among them, the bearing information data is entered into the marking chip in the tray and the data storage module of the automatic control platform at the same time when the bearing is warehoused, the measurement time is updated to the automatic control platform at the same time when the detection mechanism detects the bearing each time; the measurement parameters are updated to the automatic control platform after the detection mechanism detects the bearing each time. In a preferred example, each bearing is measured once every 8 hours.

[0061] A wheel set detection mechanism is arranged in the bearing compartment. After the wheel to be press-fitted enters the bearing compartment and stands still for a predetermined time, the wheel to be press-fitted is first detected by the wheel set detection mechanism to obtain the wheel set matching data, and the wheel set matching data is uploaded to the automatic control platform. After the data acquisition module of the automatic control platform acquires the wheel set matching data, the control module selects a bearing matching the wheel set matching data from the bearing storage data according to the wheel set matching data, and then the control module sends a transportation instruction to control the shuttle car to transport the corresponding bearing to the first elevator. The first elevator sends the bearing into the upper horizontal conveying device of the conveying rack, and the upper horizontal conveying device sends the bearing to the corresponding assembly station, and the assembly station sends the bearing out through the discharge conveying table.

[0062] It should be noted that after receiving the transportation instruction from the control module, the shuttle car first moves to the corresponding bearing position according to the storage position, and then identifies the bearing information data stored in the tray through the short-range identification device. If the bearing information data stored in the tray 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 based on the wheel set matching data, measurement time, and measurement parameters. The specific method for the control module to select a matching bearing is as follows:

[0064] Step S101: Select a first bearing set according to the wheel set matching data and measurement parameters;

[0065] Step S102: Select the bearing with the shortest measurement time distance from the current time in the first bearing set as the matching bearing.

[0066] Since in the solution of this application, the bearing does not need to enter the bearing room at the same time as the wheel to be press-fitted, therefore, the number of bearings stored in the three-dimensional storage is more than that in the prior art, and the measurement times of the bearings are also different from each other. The process of selecting the matching bearing from the first bearing set in step S102 needs to refer to the measurement time of the bearing, specifically as follows:

[0067] Step S1021: Use the bearings in the first bearing set whose measurement time distance from the current time is greater than the preset time as the alternative group, and use the bearings whose measurement time distance from the current time is less than the preset time as the selection group;

[0068] Step S1022: If the alternative group is not empty, select the bearing with the shortest measurement time distance from the current time in the alternative group as the matching bearing;

[0069] Step S1023: If the selection group is empty, select the bearing with the shortest measurement time distance from the current time in the alternative group and transport it to the detection agency for detection. If the updated data obtained by the detection agency matches the wheel set matching data, then use this bearing as the matching bearing.

[0070] The preset time is 8 hours. Generally, the bearings stored in the three-dimensional storage need to be detected again when the time reaches 8 hours. In step S1023, if the selection group is empty, it means that there is no bearing that matches the wheel to be press-fitted among the bearings that meet the detection time requirements. At this time, it is necessary to select a matching bearing from the bearings whose storage time has reached 8 hours and have not been detected again, that is, select a matching bearing from the alternative group. At this time, if there are multiple bearings that need to be detected in the three-dimensional storage at the same time, the bearings in the alternative group among the bearings to be detected are given priority for detection.

[0071] It should be noted that each bearing needs to meet the requirement of being stored between bearings 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 selected group is empty, and the data obtained from the re-inspection of the bearing with the shortest measurement time from the current time in the alternative group does not match the wheel set selection data, a prompt signal will be output, and the pending duration required for inspection will be output based on the remaining number of bearings in the alternative group.

[0073] By adopting the above technical solution, on the one hand, it realizes the simultaneous warehousing and selection of multiple groups of bearings. When the bearings are warehoused, the bearing parameters are first detected and stored in the three-dimensional storage warehouse, and each bearing is controlled by the automatic control platform to be inspected regularly. When bearings need to be selected, just select the corresponding bearings from the three-dimensional warehouse. Compared with the prior art where the selected bearings and the wheels to be press-fitted are sent into the bearing space simultaneously and measured again after a predetermined time, multiple groups of assemblies can be realized simultaneously. On the second hand, it improves the matching accuracy between the bearings and the wheels to be press-fitted. Since multiple groups of bearings can be stored simultaneously, appropriate bearings can be selected for assembly according to the wheels to be press-fitted. Compared with the low selection range of bearings in the prior art, the matching accuracy of bearing press-fitting is improved. On the third hand, it improves the wheel set press-fitting efficiency. By configuring a three-dimensional storage warehouse, a conveying rack, a shuttle car, a detection mechanism, and an assembly station, the regular detection and selection of bearings can be realized automatically. While improving the matching accuracy of bearings, it also reduces the labor cost and time cost.

[0074] Each embodiment in this specification is described in a progressive manner. The same or similar parts between each embodiment can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0075] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent matching and assembling system for pressing and fitting bearings of multiple unit trains, characterized in that The system includes: A three-dimensional storage library with an inbound side and an outbound side, the three-dimensional storage library being configured with multiple layers of shuttle tracks and shuttle cars moving along the shuttle tracks; A first elevator configured on the outbound side of the three-dimensional storage library for connecting the three-dimensional storage library and the conveying rack; A second elevator configured on the inbound side of the three-dimensional storage library, having an independently operating first lifting structure and second lifting structure; A conveying rack connected to the first elevator and configured with two horizontally arranged conveying devices arranged vertically; Assembly stations, with multiple assembly stations configured, the assembly stations being configured with assembly lifting racks, and the assembly lifting racks connecting the two horizontally arranged conveying devices of the conveying rack; A detection mechanism configured on the inbound side of the three-dimensional storage library; An automatic control platform for controlling the shuttle cars, the first elevator, the second elevator, the conveying rack, and the assembly stations and detection stations to work; The automatic control platform includes: A data acquisition module for acquiring the wheel pair matching data of the assembly stations; A data storage module storing bearing storage data, the bearing storage data including bearing information data and bearing measurement data, the bearing measurement data being data corresponding to the self-characteristics of the bearing measured at every predetermined time of the bearing; A control module for selecting a matching bearing from the bearing storage data according to the wheel pair matching data and outputting a matching instruction to control the shuttle car to convey the matching bearing to the assembly station.

2. The intelligent matching system for press-fitting of EMU bearings according to claim 1, characterized in that The bearing is configured with a corresponding tray, and the shuttle car moves the bearing through the tray.

3. The intelligent matching and assembling system for pressing and fitting EMU bearings according to claim 2, wherein, The tray is configured with a marking chip or a marking barcode, and obtains the corresponding bearing information data through the marking chip or the marking barcode.

4. The intelligent matching and assembling system for pressing and fitting EMU bearings according to claim 1, wherein, The inbound side is configured with a first conveying rack and a second conveying rack respectively connecting the first lifting structure and the second lifting structure.

5. An intelligent matching system for pressing and fitting EMU bearings according to any one of claims 1-4, characterized in that, The bearing information data includes the bearing number, the inbound time, and the storage location, and the shuttle car selects the bearing according to the storage location.

6. The intelligent matching and assembling system for pressing and fitting of EMU bearings according to claim 5, wherein, The bearing measurement data includes the measurement time and the measurement parameters, and the control module selects a matching bearing according to the wheel pair matching data, the measurement time, and the measurement parameters.

7. An intelligent matching system for pressing and fitting EMU bearings according to claim 6, characterized in that, The method by which the control module selects a matching bearing according to the wheel pair matching data, the measurement time, and the measurement parameters includes: Selecting a first set of bearings according to the wheel pair matching data and the measurement parameters; Selecting the bearing with the shortest measurement time distance from the current time in the first set of bearings as the matching bearing.

8. The intelligent matching and assembling system for the EMU bearing pressing according to claim 7, wherein, The method further includes: Regarding the bearings in the first set of bearings with the duration of the measurement time distance from the current time greater than a preset duration as an alternative group, and regarding the bearings with the duration of the measurement time distance from the current time less than the preset duration as a matching group; If the alternative group is not empty, then selecting the bearing with the shortest measurement time distance from the current time in the alternative group as the matching bearing; If the matching group is empty, then selecting the bearing with the shortest measurement time distance from the current time in the alternative group and transporting it to the detection mechanism for detection. If the updated data obtained by the detection mechanism is matched with the wheel pair matching data, then regarding this bearing as the matching bearing.

9. The intelligent matching and pressing system for EMU bearings according to claim 8, characterized in that, The method further includes that if the selected group is empty and the data obtained from the re-detection of the bearing with the shortest measurement time from the current time in the alternative group does not match the wheel set selection data, a prompt signal is output, and the required pending duration for detection is output according to the remaining number of bearings in the alternative group.

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