Method for calibrating wheel diameter of vehicle, storage medium and electronic device

Abstract

This disclosure relates to a method, storage medium, and electronic device for calibrating vehicle wheel diameter. Multiple transponders are installed along the vehicle's travel route. The method includes: for each target transponder on the route, as the vehicle passes the target transponder, acquiring the location information corresponding to that target transponder, where the target transponder includes other transponders following a preset initial transponder in the vehicle's travel direction; determining whether the vehicle's current wheel diameter needs calibration based on the location information; if calibration is required, acquiring the number of first wheel rotations corresponding to the vehicle in a first test section, where the first test section is the section between the target transponder and the next adjacent transponder; and calibrating the current wheel diameter based on the first wheel rotation count.

Description

Technical Field

[0001] This disclosure relates to the field of rail transit control technology, and more specifically, to a method for calibrating vehicle wheel diameter, a storage medium, and an electronic device. Background Technology

[0002] In the field of rail transit, vehicles rely on wheel diameter parameters for speed measurement and mileage calculation. However, wheel diameter parameters can change depending on the road conditions of the operating line. Therefore, it is necessary to calibrate the wheel diameter parameters to ensure the accuracy of speed measurement and mileage calculation.

[0003] In existing technologies, wheel diameter calibration is typically performed only at the entry and exit points of a route. This involves setting up two transponders at either the entry or exit point of the route and obtaining the vehicle's wheel diameter value based on the actual mileage and test mileage between the two transponders, as well as the number of wheel rotations when the vehicle passes through the section between the two transponders. However, calibrating the wheel diameter only at the entry or exit point of the entire route can lead to significant deviations in the calibrated wheel diameter value due to differences in road conditions between the two transponders and the actual route conditions. This, in turn, results in a decrease in the positioning accuracy of the actual mileage calculation. Summary of the Invention

[0004] The purpose of this disclosure is to provide a method, storage medium, and electronic device for calibrating vehicle wheel diameters.

[0005] To achieve the above objectives, according to a first aspect of the present disclosure, a method for calibrating the wheel diameter of a vehicle is provided, wherein a plurality of transponders are provided on the route along which the vehicle travels, the method comprising:

[0006] For each target transponder on the route, when the vehicle passes the target transponder, the location information corresponding to the target transponder is obtained. The target transponder includes other transponders after the preset initial transponder among a plurality of transponders in the direction of travel of the vehicle.

[0007] Determine whether the current wheel diameter of the vehicle needs to be calibrated based on the location information;

[0008] If it is determined that the current wheel diameter value needs to be calibrated, the number of first wheel rotations of the vehicle in the first test section is obtained, where the first test section is the section between the target transponder and the next transponder adjacent to the target transponder;

[0009] The current wheel diameter value is calibrated based on the number of revolutions of the first wheel.

[0010] Optionally, determining whether the current wheel diameter of the vehicle needs to be calibrated based on the location information includes:

[0011] The actual mileage of the vehicle in the second test section is determined based on the location information. The second test section is the section between the target transponder and the previous transponder adjacent to the target transponder.

[0012] The test mileage of the vehicle passing through the second test section is calculated based on the number of rotations of the second wheel of the vehicle in the second test section;

[0013] The mileage calibration error is determined based on the test mileage and the actual mileage.

[0014] If the mileage calibration error is greater than or equal to a preset calibration error threshold, it is determined that the current wheel diameter value of the vehicle needs to be calibrated.

[0015] Optionally, calibrating the current wheel diameter value based on the number of rotations of the first wheel includes:

[0016] The first wheel diameter value is determined based on the distance of the first test section and the number of rotations of the first wheel;

[0017] Based on the first wheel diameter value and the current wheel diameter value, it is determined whether the first wheel diameter value meets the first preset error condition. The first preset error condition includes that the ratio of the absolute value of the difference to the current wheel diameter value is less than or equal to the first preset error threshold. The absolute value of the difference is the absolute value of the difference between the first wheel diameter value and the current wheel diameter value.

[0018] If the first wheel diameter value meets the first preset error condition, the first wheel diameter value is used as the calibrated current wheel diameter value.

[0019] Optionally, the method further includes:

[0020] If the first wheel diameter value does not meet the first preset error condition, when the vehicle passes the next adjacent transponder of the target transponder, the next adjacent transponder is taken as the updated target transponder, and the wheel diameter calibration step is re-executed.

[0021] The wheel diameter calibration step includes:

[0022] Obtain the location information corresponding to the target transponder;

[0023] Determine whether the current wheel diameter of the vehicle needs to be calibrated based on the location information;

[0024] If it is determined that the current wheel diameter value needs to be calibrated, the number of first wheel rotations of the vehicle in the first test section is obtained, where the first test section is the section between the target transponder and the next transponder adjacent to the target transponder;

[0025] The current wheel diameter value is calibrated based on the number of revolutions of the first wheel.

[0026] Optionally, the method further includes:

[0027] If it is determined that the current wheel diameter value needs to be calibrated, the second wheel diameter value is determined based on the actual mileage of the second test section and the number of rotations of the second wheel;

[0028] Before obtaining the number of first wheel rotations of the vehicle in the first test section, the method further includes:

[0029] The vehicle is controlled to run in the first test section according to the second wheel diameter value.

[0030] Optionally, the method further includes:

[0031] For each of the multiple test sections on the line, obtain the historical wheel diameter calibration data corresponding to that test section;

[0032] Based on the historical wheel diameter calibration data and the current wheel diameter calibration data corresponding to the test section, determine the number of times the calibrated wheel diameter value obtained in the test section does not meet the first preset error condition;

[0033] If the number of times exceeds a preset number threshold, the preset error threshold corresponding to the test segment is increased by a preset amount to obtain a new preset error threshold.

[0034] The new preset error threshold is used as the first preset error threshold corresponding to the updated test segment.

[0035] Optionally, the method further includes:

[0036] When the number of designated transponders reaches a preset threshold, the wheel diameter calibration error threshold update step is executed repeatedly until the wheel diameter calibration error threshold is less than or equal to the preset minimum error threshold. The designated transponders are the transponders that the vehicle passes when wheel diameter calibration is required.

[0037] The wheel diameter calibration error threshold update step includes:

[0038] A specific transponder is determined from the designated transponders. The specific transponder is the transponder that the vehicle passes when the calculated wheel diameter calibration error is less than or equal to a second preset error threshold, where the second preset error threshold is less than the first preset error threshold.

[0039] Calculate the ratio of the number of the specific transponders to the number of the designated transponders to obtain the target ratio;

[0040] If the target ratio is greater than or equal to a preset ratio threshold, the first preset error threshold corresponding to the specific transponder is adjusted to the second preset error threshold.

[0041] Determine whether the number of designated transponders has increased. If the number of designated transponders has increased, select the designated transponder that is closest to the currently passed designated transponder by a preset number threshold as the new designated transponder, and re-execute the wheel diameter calibration error threshold update step.

[0042] Optionally, after adjusting the first preset error threshold corresponding to the specific transponder to the second preset error threshold, the method further includes:

[0043] The preset calibration error threshold of the test section corresponding to the specific transponder is adjusted to the second preset error threshold.

[0044] Optionally, the method further includes:

[0045] For each test section on the line, obtain the other wheel diameter calibration errors of multiple other vehicles corresponding to that test section;

[0046] Based on the other wheel diameter calibration errors and the corresponding wheel diameter calibration error of the vehicle in the test section, determine whether the vehicle has a measurement fault in the test section;

[0047] If it is determined that the vehicle has a measurement fault in the test section, a first preset fault diagnosis operation is performed.

[0048] Optionally, the method further includes:

[0049] Obtain the number of test fault sections corresponding to the vehicle on the line, wherein the test fault section is the test section where the measured fault occurred;

[0050] The fault ratio of the tested fault sections on the line is determined based on the number of tested fault sections;

[0051] If the fault ratio is greater than or equal to a preset fault ratio threshold, a second preset fault diagnosis operation is performed.

[0052] Optionally, the method further includes:

[0053] For each test section, the wheel diameter calibration error of the corresponding similar test section is obtained. The similar test section is a test section whose line conditions meet the preset consistency requirements with the test section. The line conditions include slope and / or curvature.

[0054] Determine whether the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to a preset difference threshold.

[0055] If the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to the preset difference threshold, a third preset fault diagnosis operation is performed.

[0056] According to a second aspect of the present disclosure, an apparatus for calibrating the wheel diameter of a vehicle is provided, wherein a plurality of transponders are arranged on the route along which the vehicle travels, and the apparatus includes:

[0057] The first acquisition module is used to acquire the location information corresponding to each target transponder on the route when the vehicle passes the target transponder. The target transponder includes other transponders after the preset initial transponder among a plurality of transponders in the direction of travel of the vehicle.

[0058] The first determining module is used to determine whether the current wheel diameter value of the vehicle needs to be calibrated based on the location information;

[0059] The second acquisition module is used to acquire the number of first wheel rotations of the vehicle in the first test section when it is determined that the current wheel diameter value needs to be calibrated. The first test section is the section between the target transponder and the next transponder adjacent to the target transponder.

[0060] A calibration module is used to calibrate the current wheel diameter value based on the number of rotations of the first wheel.

[0061] Optionally, the first determining module is configured to determine the actual mileage of the vehicle in the second test section based on the location information, wherein the second test section is the section between the target transponder and the previous transponder adjacent to the target transponder; calculate the test mileage of the vehicle passing through the second test section based on the number of rotations of the second wheel of the vehicle in the second test section; determine the mileage calibration error based on the test mileage and the actual mileage; and determine that the current wheel diameter value of the vehicle needs to be calibrated if the mileage calibration error is greater than or equal to a preset calibration error threshold.

[0062] Optionally, the calibration module is used to determine a first wheel diameter value based on the distance of the first test section and the number of rotations of the first wheel; determine whether the first wheel diameter value meets a first preset error condition based on the first wheel diameter value and the current wheel diameter value, wherein the first preset error condition includes the ratio of the absolute value of the difference to the current wheel diameter value being less than or equal to a first preset error threshold, and the absolute value of the difference is the absolute value of the difference between the first wheel diameter value and the current wheel diameter value; if the first wheel diameter value meets the first preset error condition, the first wheel diameter value is used as the calibrated current wheel diameter value.

[0063] Optionally, the calibration module is further configured to, if the first wheel diameter value does not meet the first preset error condition, when the vehicle passes the next adjacent transponder of the target transponder, use the next adjacent transponder as the updated target transponder and re-execute the wheel diameter calibration step;

[0064] The wheel diameter calibration step includes:

[0065] Obtain the location information corresponding to the target transponder;

[0066] Determine whether the current wheel diameter of the vehicle needs to be calibrated based on the location information;

[0067] If it is determined that the current wheel diameter value needs to be calibrated, the number of first wheel rotations of the vehicle in the first test section is obtained, where the first test section is the section between the target transponder and the next transponder adjacent to the target transponder;

[0068] The current wheel diameter value is calibrated based on the number of revolutions of the first wheel.

[0069] Optionally, the device further includes:

[0070] The second determining module is used to determine a second wheel diameter value based on the actual mileage of the second test section and the number of rotations of the second wheel when it is determined that the current wheel diameter value needs to be calibrated; and to control the vehicle to run in the first test section according to the second wheel diameter value.

[0071] Optionally, the calibration module is further configured to: acquire historical wheel diameter calibration data corresponding to each of the multiple test sections on the line; determine, based on the historical wheel diameter calibration data and the current wheel diameter calibration data corresponding to the test section, the number of times the calibrated wheel diameter value obtained in the test section does not meet the first preset error condition; if the number of times exceeds a preset number threshold, increase the preset error threshold corresponding to the test section by a preset amount to obtain a new preset error threshold; and use the new preset error threshold as the updated first preset error threshold corresponding to the test section.

[0072] Optionally, the device further includes:

[0073] The threshold update module is used to repeatedly execute the wheel diameter calibration error threshold update step when the number of specified transponders reaches a preset number threshold, until the wheel diameter calibration error threshold is less than or equal to a preset minimum error threshold. The specified transponders are the transponders that the vehicle passes when wheel diameter calibration is required.

[0074] The wheel diameter calibration error threshold update step includes:

[0075] A specific transponder is determined from the designated transponders. The specific transponder is the transponder that the vehicle passes when the calculated wheel diameter calibration error is less than or equal to a second preset error threshold, where the second preset error threshold is less than the first preset error threshold.

[0076] Calculate the ratio of the number of the specific transponders to the number of the designated transponders to obtain the target ratio;

[0077] If the target ratio is greater than or equal to a preset ratio threshold, the first preset error threshold corresponding to the specific transponder is adjusted to the second preset error threshold.

[0078] Determine whether the number of designated transponders has increased. If the number of designated transponders has increased, select the designated transponder that is closest to the currently passed designated transponder by a preset number threshold as the new designated transponder, and re-execute the wheel diameter calibration error threshold update step.

[0079] Furthermore, after adjusting the first preset error threshold corresponding to the specific transponder to the second preset error threshold, the threshold update module further includes adjusting the preset calibration error threshold of the test segment corresponding to the specific transponder to the second preset error threshold.

[0080] Optionally, the device further includes:

[0081] The third acquisition module is used to acquire the other wheel diameter calibration errors of multiple other vehicles corresponding to each test section on the line.

[0082] The third determining module is used to determine whether the vehicle has a measurement fault in the test section based on the other wheel diameter calibration errors and the wheel diameter calibration error corresponding to the vehicle in the test section.

[0083] The first execution module is used to perform a first preset fault diagnosis operation when it is determined that the vehicle has a measurement fault in the test section.

[0084] Optionally, the device further includes:

[0085] The fourth acquisition module is used to acquire the number of test fault sections corresponding to the vehicle on the line, wherein the test fault section is the test section where the measurement fault occurred;

[0086] The fourth determining module is used to determine the fault ratio of the test fault sections on the line based on the number of test fault sections;

[0087] The second execution module is used to perform a second preset fault diagnosis operation when the fault ratio is greater than or equal to a preset fault ratio threshold.

[0088] Optionally, the device further includes:

[0089] The fifth acquisition module is used to acquire the wheel diameter calibration error of the similar test section corresponding to each test section. The similar test section is a test section whose line conditions meet the preset consistency requirements with the test section. The line conditions include slope and / or curvature.

[0090] The judgment module is used to determine whether the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to a preset difference threshold.

[0091] The third execution module is used to perform a third preset fault diagnosis operation when the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to the preset difference threshold.

[0092] According to a third aspect of the present disclosure, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any of the first aspects of the present disclosure.

[0093] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising: a memory having a computer program stored thereon; and a processor for executing the computer program in the memory to implement the steps of the method described in any of the first aspects of the present disclosure.

[0094] The above technical solution involves setting up multiple transponders along the vehicle's travel route. For each target transponder on the route, when the vehicle passes the target transponder, the location information corresponding to that target transponder is obtained. The target transponders include other transponders following a preset initial transponder in the vehicle's travel direction. Based on the location information, it is determined whether the vehicle's current wheel diameter needs to be calibrated. If it is determined that the current wheel diameter needs to be calibrated, the first wheel rotation number of the vehicle in a first test section is obtained. The first test section is the section between the target transponder and the next transponder adjacent to the target transponder. The current wheel diameter is calibrated based on the first wheel rotation number. In this way, when calibrating the wheel diameter of a vehicle, this disclosure can perform wheel diameter calibration based on multiple transponders installed on the line, and perform wheel diameter calibration on the entire operating line. This can avoid the situation where the calibrated wheel diameter value has a large deviation due to the different road conditions between two transponders at the exit or entry point of the depot and the different road conditions of the operating line. This improves the accuracy of wheel diameter calibration, thereby improving the accuracy of subsequent speed and distance measurement based on wheel diameter value. At the same time, it is not limited by the location of the vehicle and wheel diameter calibration can be performed anytime and anywhere.

[0095] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0096] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0097] Figure 1 This is a flowchart illustrating a first method for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0098] Figure 2 This is a flowchart illustrating a second method for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0099] Figure 3 This is a flowchart illustrating a third method for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0100] Figure 4 This is a flowchart illustrating a fourth method for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0101] Figure 5 This is a flowchart illustrating a fifth method for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0102] Figure 6 This is a flowchart illustrating a sixth method for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0103] Figure 7 This is a flowchart illustrating a seventh method for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0104] Figure 8 This is a block diagram illustrating a first device for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0105] Figure 9 This is a block diagram illustrating a second device for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0106] Figure 10 This is a block diagram illustrating a third device for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0107] Figure 11 This is a block diagram illustrating a fourth device for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0108] Figure 12 This is a block diagram illustrating a fifth device for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0109] Figure 13 This is a block diagram illustrating a sixth device for calibrating vehicle wheel diameter according to an exemplary embodiment;

[0110] Figure 14 This is a structural block diagram of an electronic device according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0111] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0112] It should be understood that the various steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect. The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the description below.

[0113] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies. It should also be noted that the modifications of "a" and "a plurality of" mentioned in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0114] Wheel diameter calibration is a crucial element in rail transit for vehicle speed and distance measurement, directly impacting platform stopping accuracy and vehicle position determination. The basic principle of wheel diameter calibration is to divide the distance traveled by the wheel rotations to obtain the wheel diameter value. Typically, two transponders are installed at the exit or entry point of the line. The actual and test mileage of the section between the two transponders are obtained, and the number of pulses passing between the two transponders is recorded by a speed sensor to determine the wheel rotations. Finally, the wheel diameter value is calculated based on the actual mileage and rotation count. However, calibrating the wheel diameter only at the exit or entry point of the entire line can lead to significant deviations in the calibrated wheel diameter value due to differences in road conditions between the calibration section and the operating line. This can result in decreased positioning accuracy in mileage calculations.

[0115] In view of this, the present disclosure provides a method, storage medium, and electronic device for calibrating vehicle wheel diameter to solve the above problems.

[0116] Before providing a detailed description of the embodiments of the technical solution disclosed herein, the application scenarios of the technical solution disclosed herein will be described below.

[0117] The method for calibrating vehicle wheel diameter provided in this disclosure can be applied to rubber-tired vehicles using rubber tires. The executing entity can be the vehicle's vehicle domain control system or other systems with execution capabilities, and this disclosure does not specifically limit it.

[0118] The following provides a detailed description of the embodiments of the technical solution disclosed herein.

[0119] Figure 1 This is a flowchart illustrating a first method for calibrating the wheel diameter of a vehicle according to an exemplary embodiment, wherein multiple transponders are installed along the route the vehicle travels on, such as... Figure 1 As shown, the method includes:

[0120] S101: For each target transponder on the route, when a vehicle passes the target transponder, obtain the location information corresponding to that target transponder.

[0121] The target transponder includes other transponders after the preset initial transponder among multiple transponders in the vehicle's direction of travel. The preset initial transponder generally refers to the first transponder on the line corresponding to the vehicle's direction of travel, or any other transponder that is preset. This disclosure does not limit this.

[0122] For example, on a vehicle's operating route, multiple transponders are set up along the direction of the vehicle's travel. These multiple transponders can be sequentially represented as P0→P1→P2→P3......, where P0 is the preset initial transponder, and the other transponders P1, P2, P3,...... after P0 are all target transponders. In another possible application scenario, if only wheel diameter calibration is performed on the route after point P2, P2 is the preset initial transponder, and the other transponders P3, P4, P5,...... after P2 are all target transponders. The above examples are merely illustrative and this disclosure does not limit the scope of the application.

[0123] In this step, when the vehicle passes the target transponder during operation, the current location information of the transponder at the vehicle's current location can be obtained through satellite positioning technology. For example, the satellite positioning technology can be BeiDou satellite-based positioning technology or GPS (Global Positioning System).

[0124] S102, determine whether the current wheel diameter of the vehicle needs to be calibrated based on the location information.

[0125] In this step, the actual mileage of the vehicle in the second test section can be determined based on the location information. The second test section is the section between the target transponder and the previous transponder adjacent to the target transponder. The test mileage of the vehicle passing through the second test section is calculated based on the number of rotations of the second wheel of the vehicle in the second test section. The mileage calibration error is determined based on the test mileage and the actual mileage. If the mileage calibration error is greater than or equal to a preset calibration error threshold, the current wheel diameter value of the vehicle needs to be calibrated.

[0126] Figure 2 This is a flowchart illustrating a second method for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 2 As shown, step S102 specifically includes the following sub-steps:

[0127] S1021, Based on this location information, determine the actual mileage of the vehicle in the second test section.

[0128] The second test section is the section between the target transponder and the previous transponder adjacent to the target transponder.

[0129] For example, multiple transponders on the entire route are sequentially represented as P0→P1→P2→....... Assuming that the target transponder that the vehicle is currently passing is P1, then the section P0→P1 between transponder P0 and target transponder P1 is the second test section.

[0130] Once the vehicle obtains the location information of the target transponder it is currently passing, it can determine the actual mileage corresponding to the second test section based on the location information of the target transponder and the previous adjacent transponder, and the distance between these two locations on the electronic map. For example, if the vehicle travels from transponder P0 to transponder P1, it can sequentially obtain the location information of transponders P0 and P1, and determine the actual mileage traveled from transponder P0 to transponder P1 based on the distance between the two locations on the electronic map. This allows the determination of the actual mileage corresponding to the vehicle in the second test section.

[0131] S1022, calculate the test mileage of the vehicle passing through the second test section based on the number of rotations of the second wheel corresponding to the second test section.

[0132] During operation, the speed sensor pre-installed on the vehicle can measure the number of rotations of the second wheel in the second test section. The circumference of the vehicle wheel can be obtained by multiplying the current wheel diameter by pi. Then, by multiplying the number of rotations of the second wheel by the circumference of the vehicle wheel, the test mileage of the vehicle passing through the second test section can be calculated.

[0133] The current wheel diameter value of the vehicle is the wheel diameter value of the vehicle before this wheel diameter correction, which can be the wheel diameter value of the vehicle obtained by manual measurement input by the user; if wheel diameter correction has been performed before, the current wheel diameter value of the vehicle can be the most recent wheel diameter value among the historical wheel diameter values ​​of the vehicle after a preset number of wheel diameter corrections stored in the database; if the vehicle has never undergone wheel diameter correction since it left the factory, the current wheel diameter value of the vehicle can be the default wheel diameter value when the vehicle left the factory, and this disclosure does not make specific limitations in this regard.

[0134] S1023, determine the mileage calibration error based on the test mileage and the actual mileage.

[0135] In this step, the mileage calibration error is obtained by calculating the difference between the test mileage and the actual mileage of the vehicle, then calculating the ratio of the difference to the actual mileage, and taking the absolute value of the ratio.

[0136] S1024, if the mileage calibration error is greater than or equal to the preset calibration error threshold, determine that the current wheel diameter value of the vehicle needs to be calibrated.

[0137] For example, the preset calibration error threshold can be preset to 2%.

[0138] Based on Figure 2 If the steps shown indicate that calibration of the current wheel diameter is required, perform the following steps:

[0139] S103, if it is determined that the current wheel diameter value needs to be calibrated, obtain the number of first wheel rotations of the vehicle in the first test section.

[0140] The first test section is the section between the target transponder and the next transponder adjacent to the target transponder.

[0141] For example, multiple transponders on the entire route are sequentially represented as P0→P1→P2→....... Assuming that the target transponder that the vehicle is currently passing is P1, then the section P2→P3 between transponder P1 and target transponder P2 is the first test section.

[0142] In this step, during vehicle operation, a certain number of pulse signals are generated for each rotation of the vehicle's wheels. The pulse signals generated by the wheel axle pulse speed sensor installed on the vehicle are counted to obtain the number N of pulses generated by the vehicle's wheels rotating once. The total number Y of pulse signals generated by the vehicle passing through the first test section can be obtained by counting the pulse signals generated by the vehicle passing through the first test section. Then, the number of rotations of the first wheel corresponding to the first test section can be determined based on the ratio of the total number of pulses Y to the number of pulses N.

[0143] Specifically, the wheel axle pulse speed sensor can be achieved by installing a signal generator on the bearing cover of the vehicle. During vehicle movement, the signal generator outputs a certain number of pulse signals, and the pulse signals are counted to obtain the number of pulses N of one revolution of the vehicle wheel and the total number of pulse signals Y generated by the vehicle passing through the first test section.

[0144] It should be noted that the number of pulses N and the total number of pulses Y obtained in this disclosure are generated when the vehicle is moving at a constant speed. For example, the vehicle can be controlled to pass through the first test section at a constant speed (such as 60 km / h) corresponding to the minimum speed limit of the first test section.

[0145] S104, calibrate the current wheel diameter value based on the number of rotations of the first wheel.

[0146] Figure 3 This is a flowchart illustrating a third method for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 3As shown, step S104 specifically includes the following sub-steps:

[0147] S1041, determine the first wheel diameter value based on the distance of the first test section and the number of rotations of the first wheel.

[0148] Specifically, during the process of the vehicle moving from the location of the target transponder to the location of the next adjacent transponder, the location information of these two locations can be obtained through satellite positioning technology. Then, based on the location information of these two locations in the electronic map, the distance between the two locations is determined, which is the distance of the first test section.

[0149] The total number of pulses generated by the vehicle as it passes through the first test section is then obtained by the wheel axle pulse speed sensor. Based on the conversion relationship between the number of pulses per revolution of the vehicle wheel and the total number of pulses, the number of revolutions of the first wheel as it passes through the first test section can be determined.

[0150] The circumference of the vehicle wheel can be obtained by dividing the distance of the first test section by the number of rotations of the first wheel. Then, according to the formula that the circumference of the vehicle wheel is equal to the wheel diameter (the diameter of the wheel) multiplied by pi, the first wheel diameter of the vehicle can be calculated.

[0151] S1042, determine whether the first wheel diameter value meets the first preset error condition based on the first wheel diameter value and the current wheel diameter value.

[0152] The first preset error condition includes a ratio of the absolute value of the difference to the current wheel diameter value that is less than or equal to a first preset error threshold, wherein the absolute value of the difference is the absolute value of the difference between the first wheel diameter value and the current wheel diameter value.

[0153] Specifically, after calculating the first wheel diameter value of the vehicle, the difference between the first wheel diameter value and the current wheel diameter value is determined, and then it is determined whether the ratio of the absolute value of the difference to the current wheel diameter value is less than or equal to a first preset error threshold. If the ratio is less than or equal to the first preset error threshold, the first wheel diameter value is determined to meet the first preset error condition.

[0154] S1043, if the first wheel diameter value meets the first preset error condition, the first wheel diameter value is used as the current wheel diameter value after calibration.

[0155] By adopting the above scheme, multiple transponders are installed on the route in which the vehicle travels. When the vehicle undergoes wheel diameter calibration, this disclosure can perform wheel diameter calibration on the entire operating route based on the multiple transponders installed on the route. This can avoid the situation where the calibrated wheel diameter value has a large deviation due to the different road conditions at the entrance and exit of the calibration section and the road conditions of the operating route, thereby improving the accuracy of wheel diameter calibration and thus improving the accuracy of subsequent speed and distance measurement based on wheel diameter value. At the same time, it is not limited by the location of the vehicle and wheel diameter calibration can be performed anytime and anywhere.

[0156] Figure 4 This is a flowchart illustrating a fourth method for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 4 As shown, the method also includes:

[0157] S1044, if the first wheel diameter value does not meet the first preset error condition, when the vehicle passes the next adjacent transponder of the target transponder, the next adjacent transponder is used as the updated target transponder, and the wheel diameter calibration step is re-executed.

[0158] The wheel diameter calibration process includes the following steps:

[0159] Obtain the location information corresponding to the target transponder;

[0160] Based on this location information, determine whether the vehicle's current wheel diameter needs to be calibrated;

[0161] If it is determined that the current wheel diameter value needs to be calibrated, the number of first wheel rotations of the vehicle in the first test section is obtained. The first test section is the section between the target transponder and the next transponder adjacent to the target transponder.

[0162] The current wheel diameter value is calibrated based on the number of revolutions of the first wheel.

[0163] For example, when the first wheel diameter value of the vehicle is calculated, the difference between the first wheel diameter value and the current wheel diameter value is determined, and then it is determined whether the ratio of the absolute value of the difference to the current wheel diameter value is less than or equal to a first preset error threshold. If the ratio is greater than the first preset error threshold, it is determined that the first wheel diameter value does not meet the first preset error condition.

[0164] If the first wheel diameter value does not meet the first preset error condition, the next adjacent transponder is used as the updated target transponder, and then the wheel diameter calibration step is re-executed. The specific process of the wheel diameter calibration step can be referred to in steps S101 to S104, and will not be repeated here.

[0165] It should be noted that during the re-execution of the wheel diameter calibration step, the wheel diameter value of the vehicle during operation remains the current wheel diameter value.

[0166] For example, when the vehicle reaches the position of transponder P1, if the mileage calibration error is greater than or equal to a preset calibration error threshold, it is determined that the current wheel diameter value of the vehicle needs to be calibrated. Then, if it is determined that the current wheel diameter value needs to be calibrated, a second wheel diameter value is determined based on the actual mileage of the second test section and the number of rotations of the second wheel. During the process of the vehicle moving from the position of transponder P1 to the position of transponder P2, the wheel diameter value of the vehicle during the process is the wheel diameter value calculated by the vehicle in the second test section when it moves from the position of transponder P0 to the position of transponder P1.

[0167] The above technical solutions allow for continued wheel diameter calibration in the next test section even if the initial calibration fails, thereby improving the accuracy of wheel diameter calibration.

[0168] Figure 5 This is a flowchart illustrating a fifth method for calibrating vehicle wheel diameter according to an exemplary embodiment, as follows: Figure 5 As shown, the method also includes:

[0169] S105, if it is determined that the current wheel diameter value needs to be calibrated, the second wheel diameter value can be determined based on the actual mileage of the second test section and the number of rotations of the second wheel.

[0170] Specifically, the vehicle's position information when passing the transponders at both ends of the second test section can be obtained using satellite positioning technology. Based on the distance between these two locations on the electronic map, the actual mileage of the vehicle in the second test section can be determined. During vehicle operation, each rotation of the vehicle's wheels generates a certain number of pulse signals. By counting the pulse signals generated by the wheel axle pulse speed sensors installed on the vehicle, the number of pulses N generated by the vehicle's wheel rotation can be obtained. By counting the pulse signals generated by the vehicle passing through the second test section, the total number of pulses Y generated by the vehicle passing through the second test section can be obtained. The number of rotations of the second wheel corresponding to the vehicle in the second test section can be determined based on the ratio of the total number of pulses Y to the number of pulses N. Then, the current wheel circumference of the vehicle can be calculated by dividing the actual mileage of the vehicle in the second test section by the number of rotations of the second wheel. Finally, the second wheel diameter of the vehicle can be calculated using the formula that the circumference of the vehicle wheel is equal to the wheel diameter multiplied by pi.

[0171] Similarly, the number of pulses N and the total number of pulses Y obtained in this disclosure are both generated when the vehicle is moving at a constant speed.

[0172] S106, control the vehicle to run in the first test section according to the second wheel diameter value.

[0173] In this way, after the vehicle passes through the first test section according to the second wheel diameter value, the number of first wheel rotations of the vehicle in the first test section can be obtained.

[0174] Considering the actual application scenario, the vehicle will determine whether wheel diameter calibration is needed after passing each target transponder. However, if the vehicle passes through the same route section multiple times and the wheel diameter calibration fails, the preset error threshold corresponding to the test section can be increased by a preset amount. This will increase the fault tolerance of the vehicle during the wheel diameter calibration process and improve the wheel diameter calibration efficiency.

[0175] Figure 6 This is a flowchart illustrating a sixth method for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 6 As shown, the method also includes:

[0176] S107, For each of the multiple test sections on the line, obtain the historical wheel diameter calibration data corresponding to that test section;

[0177] The historical wheel diameter calibration data corresponding to the test section may include wheel diameter calibration data obtained by the vehicle in the test section during its historical operation, or wheel diameter calibration data obtained by other vehicles in the test section during their historical operation.

[0178] S108, based on the historical wheel diameter calibration data and the current wheel diameter calibration data corresponding to the test section, determine the number of times the calibrated wheel diameter value obtained in the test section does not meet the first preset error condition.

[0179] Specifically, in the wheel diameter calibration data acquired by the vehicle during its historical operation, all data that do not meet the first preset error condition can be recorded as the number of times. For example, the vehicle records each wheel diameter calibration data. If the data volume is sufficient to reach 10,000 times, the data volume that does not meet the first preset error condition in the most recent 10,000 data volumes in the historical data can be recorded as the number of times.

[0180] S109, if the number of times exceeds the preset number threshold, increase the preset error threshold corresponding to the test segment by a preset amount to obtain a new preset error threshold.

[0181] For example, if the amount of data that does not meet the first preset error condition exceeds 10% of the most recent 10,000 historical data points, the preset error threshold corresponding to that test segment can be increased by a preset margin. For instance, this preset margin can be a series of arithmetic progressions, such as 2%, 2.2%, 2.4%, 2.6%, 2.8%,...5%, or it can be any other pre-defined array. It should be noted that the preset error threshold cannot exceed a preset maximum value, such as 5%.

[0182] S1010, the new preset error threshold is used as the first preset error threshold corresponding to the updated test segment.

[0183] It should be noted that if the number of errors still exceeds the preset threshold even after the preset error threshold has been increased to the preset maximum value, the calibration is considered to have failed. In this case, an alarm should be triggered to notify maintenance personnel to maintain the relevant section.

[0184] By using the above technical solutions, if the wheel diameter calibration fails multiple times when the vehicle passes through the same section, the wheel diameter calibration judgment conditions can be appropriately amplified to perform wheel diameter calibration, thereby making the wheel diameter calibration more tolerant.

[0185] Figure 7 This is a flowchart illustrating a seventh method for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 7 As shown, the method also includes:

[0186] S1011, when the number of designated transponders reaches a preset number threshold, the wheel diameter calibration error threshold update step is executed repeatedly until the wheel diameter calibration error threshold is less than or equal to the preset minimum error threshold. The designated transponder is the transponder that the vehicle passes when wheel diameter calibration is required.

[0187] The designated transponder is the transponder that the vehicle passes by during the wheel diameter calibration process. After the vehicle passes the wheel diameter calibration error threshold update step, if the wheel diameter calibration error of the vehicle is less than the wheel diameter calibration error threshold, the wheel diameter calibration error threshold update step is continuously executed in a loop until the wheel diameter calibration error threshold is less than or equal to the preset minimum error threshold. During the loop, the preset error threshold corresponding to the test section can be reduced by a preset amount to obtain a new preset error threshold.

[0188] The preset range can be a series of arithmetic progressions, such as 2%, 1.9%, 1.8%, 1.7%, 1.6%, ... 0.1%, or it can be any other pre-defined array. It should be noted that, considering system availability and inherent system errors, the preset error threshold will not exceed a preset minimum value, for example, 0.1%.

[0189] The wheel diameter calibration error threshold update step includes:

[0190] A specific transponder is determined from the designated transponder. The specific transponder is the transponder that the vehicle passes when the calculated wheel diameter calibration error is less than or equal to a second preset error threshold, where the second preset error threshold is less than the first preset error threshold.

[0191] Calculate the ratio of the number of specific transponders to the number of designated transponders to obtain the target ratio;

[0192] If the target ratio is greater than or equal to a preset ratio threshold, the first preset error threshold corresponding to the specific transponder is adjusted to the second preset error threshold.

[0193] Furthermore, the preset calibration error threshold for the test segment corresponding to the specific transponder is adjusted to the second preset error threshold. Specifically, the wheel diameter calibration error can be calculated. When the wheel diameter calibration error is less than or equal to the second preset error threshold, the transponder in the test segment corresponding to that wheel diameter calibration error is considered a specific transponder. Considering that in practical application scenarios, if the proportion of specific transponders among the designated transponders exceeds a preset proportion threshold, it indicates that a majority of test segments meet the first preset error threshold. Furthermore, under this condition, some segments also meet the second preset error threshold, which is less than the first preset error threshold. Therefore, the first preset error threshold corresponding to the specific transponder can be adjusted to the second preset error threshold accordingly.

[0194] Determine whether the number of designated transponders has increased. If the number of designated transponders has increased, select the designated transponder that is closest to the currently passed designated transponder with a preset number threshold as the new designated transponder, and re-execute the wheel diameter calibration error threshold update step.

[0195] For example, during the vehicle's cyclic wheel diameter calibration error threshold update step, after passing the most recent transponder, we can determine that the number of designated transponders has increased, and then designate the designated transponder that is closest to the preset number threshold of the most recent transponder as the new designated transponder.

[0196] For example, if the preset quantity threshold is set to 10000, when the vehicle passes the 10001st transponder, the transponders from P0 to P10000 can be designated as the designated transponders, and when the vehicle passes the 10002nd transponder, the transponders from P1 to P10001 can be designated as the new designated transponders.

[0197] By employing the above technical solutions, when the vehicle successfully undergoes wheel diameter calibration multiple times in the same section, the wheel diameter calibration judgment conditions can be appropriately narrowed for wheel diameter calibration. Through continuous learning and optimization of the system, the wheel diameter calibration accuracy during vehicle operation can be improved, and the speed and distance measurement errors of the line can be reduced.

[0198] This solution can also be used to assess each test section on the line to determine whether a measurement fault has occurred in each test section. If a measurement fault occurs, a preset fault diagnosis operation can be performed.

[0199] In some embodiments, the method further includes: for each test section on the line, acquiring other wheel diameter calibration errors corresponding to multiple other vehicles in that test section; and determining whether the vehicle has experienced a measurement fault in that test section based on the other wheel diameter calibration errors and the wheel diameter calibration error corresponding to the vehicle in that test section.

[0200] In one possible implementation, the average value of other wheel diameter calibration errors corresponding to other trains in the test section can be calculated, and the absolute value of the difference between the wheel diameter calibration error of the vehicle in the test section and the average value of other wheel diameter calibration errors can be calculated. Then, the ratio of the absolute value of the difference to the average value of other wheel diameter calibration errors can be calculated. If the ratio is greater than or equal to a preset threshold, it is determined that a measurement fault has occurred in the test section.

[0201] For example, if the average wheel diameter calibration error of other trains in this test section is denoted as K, then the wheel diameter calibration error of this vehicle in this test section can be K. n Thus, if |Kn-K| / K is greater than or equal to a predetermined value, for example, the predetermined value could be 10%, it is determined that a measurement fault has occurred in the test section.

[0202] If it is determined that the vehicle has a measurement fault in the test section, the first preset fault diagnosis operation is executed.

[0203] The first preset fault diagnosis operation may include one or more of the following: manually measuring the wheel diameter value of the corresponding train, checking the wheel diameter calibration software, and determining whether it is a speed sensor or BTM fault.

[0204] In one possible implementation, if it is determined that the vehicle has a measurement fault in the test section, the wheel diameter of the corresponding train can be measured manually. The measured wheel diameter is compared with the wheel diameter measured by the system, and the absolute value of the difference between the manually measured wheel diameter and the system measured wheel diameter is calculated. Then, the ratio of the absolute value of the difference to the manually measured wheel diameter can be calculated. If the ratio is less than or equal to a preset threshold, another diagnostic operation is performed, namely, checking the wheel diameter calibration software to determine whether it is a speed sensor or BTM fault.

[0205] For example, the wheel diameter value of the corresponding train is measured manually and denoted as D1. The wheel diameter value measured by the system is denoted as D. The error ratio b can be calculated as b = |D1 - D| / D1. If b is less than or equal to 2%, the measurement is performed in other sections. If no similar problem occurs, the test is returned to the section where the problem occurred. If the problem recurs, the wheel diameter calibration software is checked to determine whether the speed sensor or BTM is faulty. After updating, the measurement is repeated. If the problem does not occur, normal operation is possible.

[0206] By using the above method, it is possible to determine whether a measurement fault has occurred in the vehicle in the test section when the wheel diameter calibration of the vehicle is abnormal in a measurement section. Based on the fault, the first preset fault diagnosis operation is performed on the vehicle to eliminate the fault and improve the efficiency of vehicle wheel diameter calibration.

[0207] The method further includes: obtaining the number of test fault sections corresponding to the vehicle on the route, wherein the test fault sections are test sections where measurement faults occur; determining the fault ratio of the test fault sections on the route based on the number of test fault sections; and performing a second preset fault diagnosis operation if the fault ratio is greater than or equal to a preset fault ratio threshold.

[0208] The second preset fault diagnosis operation may include one or more of the following: checking whether the speed sensor is working properly, checking whether the BTM is working properly, and updating the speed and distance measurement system software.

[0209] In one possible implementation, it is determined whether a measurement fault has occurred in the test section of the line for the vehicle, and the fault ratio of the test fault section on the line is determined based on the number of test fault sections. If the fault ratio is greater than or equal to a preset fault ratio threshold, a second preset fault diagnosis operation is performed.

[0210] By using the above method, when the fault ratio is greater than or equal to the preset fault ratio threshold, it can be determined that the measurement fault is caused by a problem with the vehicle, and a second preset fault diagnosis operation can be performed to eliminate the fault and improve the efficiency of vehicle wheel diameter calibration.

[0211] In some embodiments, the method further includes: for each test segment, obtaining the wheel diameter calibration error of a similar test segment corresponding to the test segment, wherein the similar test segment is a test segment whose track conditions meet a preset consistency requirement with the test segment, and the track conditions include slope and / or curvature; determining whether the absolute value of the difference between the wheel diameter calibration error corresponding to the test segment and the wheel diameter calibration error of the similar test segment is greater than or equal to a preset difference threshold; and performing a third preset fault diagnosis operation if the absolute value of the difference between the wheel diameter calibration error corresponding to the test segment and the wheel diameter calibration error of the similar test segment is greater than or equal to the preset difference threshold.

[0212] The third preset fault diagnosis operation may include one or more of the following operations: checking whether the plane of the section line is damaged, checking whether the section line is not straight due to thermal expansion and contraction, and checking whether there are foreign objects intruding into the section line.

[0213] By using the above methods, it is possible to determine whether the problem with wheel diameter calibration is caused by an abnormality in the test section's track when comparing it with test sections with similar track conditions. When a problem occurs, the abnormal track condition can be manually eliminated in a timely manner to ensure the normal progress of wheel diameter calibration and improve the efficiency of vehicle wheel diameter calibration.

[0214] Figure 8 This is a block diagram illustrating a first device for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 8 As shown, the device 800 may include:

[0215] The first acquisition module 801 is used to acquire the location information corresponding to each target transponder on the route when the vehicle passes the target transponder. The target transponder includes other transponders after the preset initial transponder among multiple transponders in the direction of travel of the vehicle.

[0216] The first determining module 802 is used to determine whether the current wheel diameter value of the vehicle needs to be calibrated based on the location information;

[0217] The second acquisition module 803 is used to acquire the number of first wheel rotations of the vehicle in the first test section when it is determined that the current wheel diameter value needs to be calibrated. The first test section is the section between the target transponder and the next transponder adjacent to the target transponder.

[0218] The calibration module 804 is used to calibrate the current wheel diameter value based on the number of revolutions of the first wheel.

[0219] Optionally, the first determining module 802 is used to determine the actual mileage corresponding to the second test section based on the location information, wherein the second test section is the section between the target transponder and the previous transponder adjacent to the target transponder; calculate the test mileage of the vehicle passing through the second test section based on the number of rotations of the second wheel of the vehicle in the second test section; determine the mileage calibration error based on the test mileage and the actual mileage; and determine that the current wheel diameter value of the vehicle needs to be calibrated if the mileage calibration error is greater than or equal to a preset calibration error threshold.

[0220] Optionally, the calibration module 804 is used to determine a first wheel diameter value based on the distance of the first test section and the number of rotations of the first wheel; determine whether the first wheel diameter value meets a first preset error condition based on the first wheel diameter value and the current wheel diameter value, the first preset error condition including that the ratio of the absolute value of the difference to the current wheel diameter value is less than or equal to a first preset error threshold, the absolute value of the difference is the absolute value of the difference between the first wheel diameter value and the current wheel diameter value; if the first wheel diameter value meets the first preset error condition, the first wheel diameter value is used as the calibrated current wheel diameter value.

[0221] Optionally, the calibration module 804 is further configured to, if the first wheel diameter value does not meet the first preset error condition, when the vehicle passes the next adjacent transponder of the target transponder, use the next adjacent transponder as the updated target transponder and re-execute the wheel diameter calibration step;

[0222] The wheel diameter calibration procedure includes:

[0223] Obtain the location information corresponding to the target transponder;

[0224] Based on this location information, determine whether the vehicle's current wheel diameter needs to be calibrated;

[0225] If it is determined that the current wheel diameter value needs to be calibrated, the number of first wheel rotations of the vehicle in the first test section is obtained. The first test section is the section between the target transponder and the next transponder adjacent to the target transponder.

[0226] The current wheel diameter value is calibrated based on the number of revolutions of the first wheel.

[0227] Optionally, Figure 9 This is a block diagram illustrating a second device for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 9 As shown, the device also includes:

[0228] The second determining module 805 is used to determine a second wheel diameter value based on the actual mileage of the second test section and the number of rotations of the second wheel when it is determined that the current wheel diameter value needs to be calibrated; and to control the vehicle to run in the first test section according to the second wheel diameter value.

[0229] Optionally, the calibration module 804 is further configured to: acquire historical wheel diameter calibration data corresponding to each of the multiple test sections on the line; determine the number of times the calibrated wheel diameter value obtained in the test section does not meet the first preset error condition based on the historical wheel diameter calibration data and the current wheel diameter calibration data corresponding to the test section; if the number of times exceeds a preset number threshold, increase the preset error threshold corresponding to the test section by a preset amount to obtain a new preset error threshold; and use the new preset error threshold as the updated first preset error threshold corresponding to the test section.

[0230] Optionally, Figure 10 This is a block diagram illustrating a third device for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 10 As shown, the device also includes:

[0231] The threshold update module 806 is used to repeatedly execute the wheel diameter calibration error threshold update step when the number of specified transponders reaches a preset number threshold, until the wheel diameter calibration error threshold is less than or equal to a preset minimum error threshold. The specified transponder is the transponder that the vehicle passes when wheel diameter calibration is required.

[0232] The wheel diameter calibration error threshold update step includes:

[0233] A specific transponder is determined from the designated transponder. The specific transponder is the transponder that the vehicle passes when the calculated wheel diameter calibration error is less than or equal to a second preset error threshold, where the second preset error threshold is less than the first preset error threshold.

[0234] Calculate the ratio of the number of specific transponders to the number of designated transponders to obtain the target ratio;

[0235] If the target ratio is greater than or equal to a preset ratio threshold, the first preset error threshold corresponding to the specific transponder is adjusted to the second preset error threshold.

[0236] Determine whether the number of designated transponders has increased. If the number of designated transponders has increased, select the designated transponder that is closest to the currently passed designated transponder with a preset number threshold as the new designated transponder, and re-execute the wheel diameter calibration error threshold update step.

[0237] Optionally, after adjusting the first preset error threshold corresponding to the specific transponder to the second preset error threshold, the threshold update module 806 is further configured to adjust the preset calibration error threshold of the test section corresponding to the specific transponder to the second preset error threshold.

[0238] Optionally, Figure 11 This is a block diagram illustrating a fourth device for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 11 As shown, the device also includes:

[0239] The third acquisition module 807 is used to acquire the other wheel diameter calibration errors of multiple other vehicles corresponding to each test section on the line for each test section.

[0240] The third determining module 808 is used to determine whether the vehicle has a measurement fault in the test section based on the other wheel diameter calibration error and the wheel diameter calibration error corresponding to the vehicle in the test section.

[0241] The first execution module 809 is used to perform a first preset fault diagnosis operation when it is determined that the vehicle has a measurement fault in the test section.

[0242] Optionally, Figure 12 This is a block diagram illustrating a fifth device for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 12 As shown, the device also includes:

[0243] The fourth acquisition module 8010 is used to acquire the number of test fault sections corresponding to the vehicle on the line, wherein the test fault section is the test section where the measurement fault occurred;

[0244] The fourth determining module 8011 is used to determine the fault ratio of the test fault section on the line based on the number of test fault sections;

[0245] The second execution module 8012 is used to perform a second preset fault diagnosis operation when the fault ratio is greater than or equal to a preset fault ratio threshold.

[0246] Optionally, Figure 13 This is a block diagram illustrating a sixth device for calibrating vehicle wheel diameter according to an exemplary embodiment, such as... Figure 13 As shown, the device also includes:

[0247] The fifth acquisition module 8013 is used to acquire the wheel diameter calibration error of the similar test section corresponding to each test section. The similar test section is a test section whose line conditions meet the preset consistency requirements with the test section. The line conditions include slope and / or curvature.

[0248] The judgment module 8014 is used to determine whether the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to a preset difference threshold.

[0249] The third execution module 8015 is used to perform a third preset fault diagnosis operation when the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to the preset difference threshold.

[0250] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0251] Using the above-mentioned device, multiple transponders are installed on the route the vehicle travels. When the vehicle undergoes wheel diameter calibration, this disclosure can perform wheel diameter calibration on the entire operating route based on the multiple transponders installed on the route. This avoids the situation where the calibrated wheel diameter value deviates significantly due to differences in road conditions between the calibration section and the operating route, thereby improving the accuracy of wheel diameter calibration. This, in turn, improves the accuracy of subsequent speed and distance measurement based on wheel diameter values. At the same time, it is not limited by the location of the vehicle and wheel diameter calibration can be performed anytime and anywhere.

[0252] Figure 14 This is a structural block diagram of an electronic device 1400 according to an exemplary embodiment of the present disclosure. Figure 14 As shown, the electronic device 1400 may include a processor 1401 and a memory 1402. The electronic device 1400 may also include one or more of a multimedia component 1403, an input / output (I / O) interface 1404, and a communication component 1405.

[0253] The processor 1401 controls the overall operation of the electronic device 1400 to complete all or part of the steps in the method for calibrating vehicle wheel diameters described above. The memory 1402 stores various types of data to support the operation of the electronic device 1400. This data may include, for example, instructions for any application or method operating on the electronic device 1400, and application-related data such as contact data, sent and received messages, pictures, audio, video, etc. The memory 1402 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. Multimedia component 1403 may include a screen and an audio component. The screen may be, for example, a touchscreen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in memory 1402 or transmitted via communication component 1405. The audio component also includes at least one speaker for outputting audio signals. I / O interface 1404 provides an interface between processor 1401 and other interface modules, such as a keyboard, mouse, buttons, etc. These buttons may be virtual or physical buttons. Communication component 1405 is used for wired or wireless communication between the electronic device 1400 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IoT, eMTC, or other 5G technologies, or combinations thereof, is not limited here. Therefore, the corresponding communication component 1405 may include: a Wi-Fi module, a Bluetooth module, an NFC module, etc.

[0254] In an exemplary embodiment, the electronic device 1400 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method for calibrating vehicle wheel diameters.

[0255] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the method for calibrating vehicle wheel diameter described above. For example, the computer-readable storage medium may be the memory 1402 including the program instructions described above, which may be executed by the processor 1401 of the electronic device 1400 to complete the method for calibrating vehicle wheel diameter described above.

[0256] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and all such simple modifications fall within the protection scope of this disclosure. It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not further describe the various possible combinations.

[0257] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A method for calibrating vehicle wheel diameter, characterized in that, The method includes: Multiple transponders are installed along the route the vehicle travels on. For each target transponder on the route, when the vehicle passes the target transponder, the location information corresponding to the target transponder is obtained. The target transponder includes other transponders after the preset initial transponder among a plurality of transponders in the direction of travel of the vehicle. Determine whether the current wheel diameter of the vehicle needs to be calibrated based on the location information; If it is determined that the current wheel diameter value needs to be calibrated, the number of first wheel rotations of the vehicle in the first test section is obtained, where the first test section is the section between the target transponder and the next transponder adjacent to the target transponder; The current wheel diameter value is calibrated based on the number of rotations of the first wheel. The step of determining whether the current wheel diameter of the vehicle needs to be calibrated based on the location information includes: The actual mileage of the vehicle in the second test section is determined based on the location information. The second test section is the section between the target transponder and the previous transponder adjacent to the target transponder. The test mileage of the vehicle passing through the second test section is calculated based on the number of rotations of the second wheel of the vehicle in the second test section; The mileage calibration error is determined based on the test mileage and the actual mileage. If the mileage calibration error is greater than or equal to a preset calibration error threshold, it is determined that the current wheel diameter value of the vehicle needs to be calibrated.

2. The method according to claim 1, characterized in that, The step of calibrating the current wheel diameter value based on the number of rotations of the first wheel includes: The first wheel diameter value is determined based on the distance of the first test section and the number of rotations of the first wheel; Based on the first wheel diameter value and the current wheel diameter value, it is determined whether the first wheel diameter value meets the first preset error condition. The first preset error condition includes that the ratio of the absolute value of the difference to the current wheel diameter value is less than or equal to the first preset error threshold. The absolute value of the difference is the absolute value of the difference between the first wheel diameter value and the current wheel diameter value. If the first wheel diameter value meets the first preset error condition, the first wheel diameter value is used as the calibrated current wheel diameter value.

3. The method according to claim 2, characterized in that, The method further includes: If the first wheel diameter value does not meet the first preset error condition, when the vehicle passes the next adjacent transponder of the target transponder, the next adjacent transponder is taken as the updated target transponder, and the wheel diameter calibration step is re-executed. The wheel diameter calibration step includes: Obtain the location information corresponding to the target transponder; Determine whether the current wheel diameter of the vehicle needs to be calibrated based on the location information; If it is determined that the current wheel diameter value needs to be calibrated, the number of first wheel rotations of the vehicle in the first test section is obtained, where the first test section is the section between the target transponder and the next transponder adjacent to the target transponder; The current wheel diameter value is calibrated based on the number of revolutions of the first wheel.

4. The method according to claim 1, characterized in that, The method further includes: If it is determined that the current wheel diameter value needs to be calibrated, the second wheel diameter value is determined based on the actual mileage of the second test section and the number of rotations of the second wheel; Before obtaining the number of first wheel rotations of the vehicle in the first test section, the method further includes: The vehicle is controlled to run in the first test section according to the second wheel diameter value.

5. The method according to claim 2, characterized in that, The method further includes: For each of the multiple test sections on the line, obtain the historical wheel diameter calibration data corresponding to that test section; Based on the historical wheel diameter calibration data and the current wheel diameter calibration data corresponding to the test section, determine the number of times the calibrated wheel diameter value obtained in the test section does not meet the first preset error condition; If the number of times exceeds a preset number threshold, the preset error threshold corresponding to the test segment is increased by a preset amount to obtain a new preset error threshold. The new preset error threshold is used as the first preset error threshold corresponding to the updated test segment.

6. The method according to claim 2, characterized in that, The method further includes: When the number of designated transponders reaches a preset threshold, the wheel diameter calibration error threshold update step is executed repeatedly until the wheel diameter calibration error threshold is less than or equal to the preset minimum error threshold. The designated transponders are the transponders that the vehicle passes when wheel diameter calibration is required. The wheel diameter calibration error threshold update step includes: A specific transponder is determined from the designated transponders. The specific transponder is the transponder that the vehicle passes when the calculated wheel diameter calibration error is less than or equal to a second preset error threshold, where the second preset error threshold is less than the first preset error threshold. Calculate the ratio of the number of the specific transponders to the number of the designated transponders to obtain the target ratio; If the target ratio is greater than or equal to a preset ratio threshold, the first preset error threshold corresponding to the specific transponder is adjusted to the second preset error threshold. Determine whether the number of designated transponders has increased. If the number of designated transponders has increased, select the designated transponder that is closest to the currently passed designated transponder by a preset number threshold as the new designated transponder, and re-execute the wheel diameter calibration error threshold update step.

7. The method according to claim 6, characterized in that, After adjusting the first preset error threshold corresponding to the specific transponder to the second preset error threshold, the method further includes: The preset calibration error threshold of the test section corresponding to the specific transponder is adjusted to the second preset error threshold.

8. The method according to any one of claims 1-7, characterized in that, The method further includes: For each test section on the line, obtain the other wheel diameter calibration errors of multiple other vehicles corresponding to that test section; Based on the other wheel diameter calibration errors and the corresponding wheel diameter calibration error of the vehicle in the test section, determine whether the vehicle has a measurement fault in the test section; If it is determined that the vehicle has a measurement fault in the test section, a first preset fault diagnosis operation is performed.

9. The method according to claim 8, characterized in that, The method further includes: Obtain the number of test fault sections corresponding to the vehicle on the line, wherein the test fault section is the test section where the measured fault occurred; The fault ratio of the tested fault sections on the line is determined based on the number of tested fault sections; If the fault ratio is greater than or equal to a preset fault ratio threshold, a second preset fault diagnosis operation is performed.

10. The method according to any one of claims 1-7, characterized in that, The method further includes: For each test section, the wheel diameter calibration error of the corresponding similar test section is obtained. The similar test section is a test section whose line conditions meet the preset consistency requirements with the test section. The line conditions include slope and / or curvature. Determine whether the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to a preset difference threshold. If the absolute value of the difference between the wheel diameter calibration error corresponding to the test section and the wheel diameter calibration error of the similar test section is greater than or equal to the preset difference threshold, a third preset fault diagnosis operation is performed.

11. An electronic device, characterized in that, include: A memory on which computer programs are stored; processor; The steps of executing the computer program in the memory to implement the method for calibrating vehicle wheel diameter as described in any one of claims 1 to 10 are as follows.

12. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When executed by the processor, the program instructions implement the steps of the method for calibrating the wheel diameter of a vehicle as described in any one of claims 1 to 10.

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