Vehicle height calibration processing method, device and computer readable storage medium
A multi-step calibration process for air suspension systems addresses errors in vehicle height mapping by refining relationships through virtual, real, and production line calibrations, improving accuracy and vehicle performance.
Patent Information
- Application Number
- CN202210744176.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-06-28
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2042-06-28
Smart Images
Figure CN115325923B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of vehicles, and in particular to a vehicle height calibration processing method, device and computer-readable storage medium. Background Art
[0002] With the development of new automotive technologies, more and more luxury cars are equipped with electronically controlled air suspension systems. The air suspension system consists of a controller, height sensor, compressor, air reservoir, solenoid valve, accessories and pipelines, which can achieve real-time adjustment of the vehicle height, greatly improving the high-speed handling and low-speed passability of the vehicle. The air suspension system can determine the height change of the vehicle body according to different road conditions and the signal of the distance sensor, and then control the air compressor and exhaust valve to automatically compress or extend the spring, thereby reducing or increasing the ground clearance of the chassis to increase the stability of the high-speed vehicle body or the passability of complex road conditions. Therefore, the accuracy of vehicle height adjustment affects the posture of the vehicle, and then affects the comfort and handling of the vehicle.
[0003] In the related art, when calibrating the air suspension vehicle height, the virtual vehicle height mapping relationship calibration and the production line vehicle height offset calibration are usually adopted. The vehicle height calibration is completed through the above process, but the vehicle height mapping relationship calibrated by the above vehicle height calibration method has a large error.
[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention
[0005] The embodiments of the present invention provide a vehicle height calibration processing method, device and computer-readable storage medium to at least solve the technical problem that the vehicle height calibration method used in the related art leads to a large error in the vehicle height mapping relationship.
[0006] According to one aspect of an embodiment of the present invention, a vehicle height calibration processing method is provided, comprising: determining a virtual vehicle height mapping relationship between a vehicle height and an output voltage of a vehicle height sensor based on a virtual prototype vehicle model of a target vehicle; obtaining test data of a prototype vehicle corresponding to the virtual prototype vehicle model during a first road test based on the virtual vehicle height mapping relationship, wherein the test data comprises: a test vehicle height and a test vehicle height sensor output voltage at a plurality of test points; generating a real vehicle height mapping relationship between a vehicle height and an output voltage of the vehicle height sensor based on the test data; obtaining a production line vehicle height correction amount corresponding to the assembled real vehicle after the target vehicle is assembled on the production line and undergoes a second road test; and correcting the real vehicle height mapping relationship using the production line vehicle height correction amount to obtain a target vehicle height mapping relationship for the target vehicle.
[0007] Optionally, based on the virtual vehicle height mapping relationship, obtaining test data of the sample vehicle corresponding to the virtual sample vehicle model during the first road test includes: determining a sample vehicle height correction amount caused by sample vehicle assembly; correcting the virtual vehicle height mapping relationship using the sample vehicle height correction amount to obtain a sample vehicle height mapping relationship; and obtaining the test data of the sample vehicle corresponding to the virtual sample vehicle model during the first road test under the sample vehicle height mapping relationship.
[0008] Optionally, generating a real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor based on the test data includes: when there are multiple sample vehicles, determining the vehicle height mapping relationship between the vehicle heights corresponding to the multiple sample vehicles and the output voltage of the vehicle height sensor based on multiple groups of test data corresponding to the multiple sample vehicles; and averaging the vehicle height mapping relationships corresponding to the multiple sample vehicles to obtain the real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor.
[0009] Optionally, generating a real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor based on the test data includes: when there are multiple sample vehicles, averaging multiple groups of test data corresponding to the multiple sample vehicles at the multiple test points to obtain average values corresponding to the multiple test points; and obtaining the real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor based on the average values corresponding to the multiple test points.
[0010] Optionally, the obtaining of the production line vehicle height correction amount corresponding to the assembled vehicle after the target vehicle is assembled on the production line and undergoes a second road test, comprises: measuring the vehicle height of the assembled vehicle after the target vehicle is assembled on the production line and undergoing the second road test to obtain an actual vehicle height; obtaining a stored vehicle height stored in a vehicle controller in the assembled vehicle; and determining the difference between the actual vehicle height and the stored vehicle height as the production line vehicle height correction amount.
[0011] Optionally, during the first road test, the prototype vehicle fully releases the internal stress of the rubber parts of the entire vehicle; during the second road test, the assembled actual vehicle fully releases the internal stress of the rubber parts of the entire vehicle.
[0012] Optionally, the prototype vehicle or the assembled vehicle fully releases the internal stress of the rubber parts of the whole vehicle through at least one of the following methods: the prototype vehicle or the assembled vehicle travels on a first road surface for more than a first predetermined distance, and the prototype vehicle or the assembled vehicle travels on a second road surface for more than a second predetermined distance, wherein the second road surface is bumpier than the first road surface, and the first predetermined distance is longer than the second predetermined distance.
[0013] According to another aspect of an embodiment of the present invention, a vehicle height calibration processing device is also provided, including: a determination module, used to determine a virtual vehicle height mapping relationship between a vehicle height and an output voltage of a vehicle height sensor based on a virtual prototype vehicle model of a target vehicle; a first acquisition module, used to obtain test data of a prototype vehicle corresponding to the virtual prototype vehicle model during a first road test based on the virtual vehicle height mapping relationship, wherein the test data includes: a test vehicle height and an output voltage of a test vehicle height sensor at multiple test points; a generation module, used to generate a real vehicle height mapping relationship between a vehicle height and an output voltage of a vehicle height sensor based on the test data; a second acquisition module, used to obtain a production line vehicle height correction amount corresponding to the assembled real vehicle after the target vehicle is assembled on the production line and undergoes a second road test; a correction module, used to correct the real vehicle height mapping relationship using the production line vehicle height correction amount to obtain a target vehicle height mapping relationship for the target vehicle.
[0014] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned vehicle height calibration processing methods.
[0015] According to another aspect of an embodiment of the present invention, there is further provided a computer device, comprising: a memory and a processor, wherein the memory stores a computer program; the processor is used to execute the computer program stored in the memory, and when the computer program is run, the processor executes any one of the above-mentioned vehicle height calibration processing methods.
[0016] In an embodiment of the present invention, after determining a virtual vehicle height mapping relationship based on a virtual sample model, determining a real vehicle height mapping relationship corresponding to a sample vehicle based on test data corresponding to a road test of the sample vehicle, and obtaining a production line vehicle height correction amount after a road test of the real vehicle assembled on the production line, and using the production line vehicle height correction amount to correct the real vehicle height mapping relationship to obtain a target vehicle height mapping relationship of the target vehicle, an accurate real vehicle height mapping relationship is obtained through the test data of the sample vehicle, thereby achieving the purpose of improving the accuracy of the vehicle height mapping relationship, thereby realizing the technical effect of effectively improving the vehicle height adjustment accuracy, and further solving the technical problem that the vehicle height calibration method used in the related technology leads to a large error in the vehicle height mapping relationship. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0018] Figure 1is a flow chart of a vehicle height calibration processing method according to an embodiment of the present invention;
[0019] Figure 2 is a flow chart of a virtual vehicle height mapping relationship according to an optional embodiment of the present invention;
[0020] Figure 3 is a flow chart of a real vehicle height mapping relationship according to an optional implementation manner of the present invention;
[0021] Figure 4 is a flow chart of calibrating the vehicle height offset of a production line according to an optional embodiment of the present invention;
[0022] Figure 5 It is a structural block diagram of a vehicle height calibration processing device provided according to an embodiment of the present invention. DETAILED DESCRIPTION
[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.
[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0025] According to an embodiment of the present invention, a method embodiment of a vehicle height calibration processing method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.
[0026] Figure 1 is a flow chart of a vehicle height calibration processing method according to an embodiment of the present invention. Figure 1 As shown, the method comprises the following steps:
[0027] Step S102, determining a virtual vehicle height mapping relationship between a vehicle height and an output voltage of a vehicle height sensor based on a virtual prototype vehicle model of the target vehicle;
[0028] Step S104, based on the virtual vehicle height mapping relationship, obtaining test data of the sample vehicle corresponding to the virtual sample vehicle model during the first road test, wherein the test data includes: the test vehicle height at multiple test points and the output voltage of the test vehicle height sensor;
[0029] Step S106, generating a real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor based on the test data;
[0030] Step S108, obtaining a production line vehicle height correction value corresponding to the assembled actual vehicle after the target vehicle is assembled on the production line and undergoes a second road test process;
[0031] Step S110, using the production line vehicle height correction amount to correct the actual vehicle height mapping relationship to obtain a target vehicle height mapping relationship of the target vehicle.
[0032] Through the above steps, after determining the virtual vehicle height mapping relationship based on the virtual sample model, the actual vehicle height mapping relationship corresponding to the sample vehicle is determined based on the test data corresponding to the road test of the sample vehicle, and after the actual vehicle assembled on the production line is road tested, the production line vehicle height correction amount is obtained, and the actual vehicle height mapping relationship is corrected using the production line vehicle height correction amount to obtain the target vehicle height mapping relationship of the target vehicle. The accurate actual vehicle height mapping relationship is obtained through the test data of the sample vehicle, thereby achieving the purpose of improving the accuracy of the vehicle height mapping relationship, thereby achieving the technical effect of effectively improving the vehicle height adjustment accuracy, and further solving the technical problem that the vehicle height calibration method used in the related technology leads to a large error in the vehicle height mapping relationship.
[0033] Using the above processing method, at least three calibration operations were performed on the target vehicle, among which a sample vehicle was used to calibrate the precise vehicle height mapping relationship of the actual vehicle, which effectively improved the accuracy of the vehicle height mapping relationship and effectively improved the vehicle height adjustment accuracy.
[0034] As an optional embodiment, the vehicle height mapping relationship of the sample vehicle can be obtained based on the virtual vehicle height mapping relationship. For example, the virtual vehicle height mapping relationship is loaded into the sample vehicle, and the vehicle height mapping relationship of the sample vehicle is obtained based on the data obtained by testing the sample vehicle during the road test. In general, in the process of obtaining the sample vehicle, the virtual vehicle height mapping relationship can be first loaded into the vehicle, and then the test data is obtained by road testing the vehicle with the virtual vehicle height mapping relationship added, and the vehicle height mapping relationship of the sample vehicle is obtained based on the test data. It should be noted that in the above process of obtaining the vehicle height mapping relationship of the sample vehicle, since the virtual vehicle height mapping relationship is loaded during the assembly process of the entire sample vehicle, the vehicle parameters during the assembly process of the sample vehicle (for example, the data of the wheel position sensor related to the vehicle height) will be different from the vehicle parameters when determining the virtual vehicle height mapping relationship, that is, if the virtual vehicle height mapping relationship is directly used, it will cause a certain error. Therefore, in order to avoid the deviation of vehicle height calibration caused by the assembly process of the prototype vehicle, before using the virtual vehicle height mapping relationship to conduct a road test on the prototype vehicle, the above deviation value of the virtual mapping relationship can be adjusted first, so that an accurate virtual vehicle height mapping relationship is used subsequently.
[0035] For example, based on the virtual vehicle height mapping relationship, when obtaining the test data of the prototype vehicle corresponding to the virtual prototype vehicle model during the first road test, the following processing can be used: determine the prototype vehicle height correction amount caused by the prototype vehicle assembly; use the prototype vehicle height correction amount to correct the virtual vehicle height mapping relationship to obtain the prototype vehicle height mapping relationship; obtain the test data of the prototype vehicle corresponding to the virtual prototype vehicle model during the first road test under the prototype vehicle height mapping relationship. By adjusting the standard of the virtual vehicle height mapping relationship, the virtual vehicle height mapping relationship determined by the virtual prototype vehicle model is used in the subsequent first road test based on the prototype vehicle, thereby improving the accuracy of the vehicle height adjustment during the first road test, and thereby obtaining the accuracy of the test data during the first road test.
[0036] In order to avoid the error caused by a single vehicle, improve the accuracy of the test data, and then improve the accuracy of the vehicle mapping relationship of the sample vehicle, multiple sample vehicles can be used for the first road test process. The multiple sample vehicles are averaged to obtain the actual vehicle height mapping relationship corresponding to the sample vehicle. For example, based on the test data, when the actual vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor is generated, the following processing can be used: when there are multiple sample vehicles, the vehicle height mapping relationship between the vehicle height corresponding to the multiple sample vehicles and the output voltage of the vehicle height sensor is determined based on multiple groups of test data corresponding to the multiple sample vehicles; the vehicle height mapping relationship corresponding to the multiple sample vehicles is averaged to obtain the actual vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor. By averaging the vehicle height mapping relationships corresponding to multiple sample vehicles, the actual vehicle height mapping relationship is obtained, so that the actual vehicle height mapping relationship of the sample vehicle can effectively avoid the accidental error caused by a single sample vehicle, and effectively improve the accuracy of the actual vehicle height mapping relationship.
[0037] When generating a real vehicle height mapping relationship between vehicle height and the output voltage of the vehicle height sensor based on test data, in addition to adopting the above-mentioned method of averaging the vehicle height mapping results of multiple sample vehicles to obtain the real vehicle height mapping relationship of the sample vehicle, the test data of multiple sample vehicles can also be directly averaged, and the real vehicle height mapping relationship corresponding to the sample vehicle can be generated based on the average value of the test data, so that the obtained real vehicle height mapping relationship is obtained based on the actual measured test data, further improving the accuracy of the real vehicle height mapping relationship. For example, the following processing can be adopted: when there are multiple sample vehicles, the multiple groups of test data corresponding to the multiple sample vehicles are averaged at multiple test points to obtain the corresponding average values at the multiple test points; based on the corresponding average values at the multiple test points, the real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor is obtained.
[0038] As an optional embodiment, in order to further improve the accuracy of vehicle height calibration, the following method can be optionally used to obtain the production line vehicle height correction corresponding to the assembled vehicle after the target vehicle is assembled on the production line and undergoes the second road test process: after the target vehicle is assembled on the production line and undergoes the second road test process, the vehicle height of the assembled vehicle is measured to obtain the actual vehicle height; the stored vehicle height stored in the vehicle controller of the assembled vehicle is obtained; and the difference between the actual vehicle height and the stored vehicle height is determined to be the production line vehicle height correction. Among them, the stored vehicle height stored in the vehicle controller can be a vehicle height adjusted to by the vehicle controller according to vehicle needs after the assembly of the assembled vehicle is completed.
[0039] It should be noted that during the first road test, the prototype vehicle fully releases the internal stress of the rubber parts of the vehicle; during the second road test, the assembled vehicle fully releases the internal stress of the rubber parts of the vehicle. The prototype vehicle or assembled vehicle can fully release the internal stress of the rubber parts of the vehicle in a variety of ways. For example, the internal stress of the rubber parts of the vehicle can be fully released in at least one of the following ways: the prototype vehicle or assembled vehicle travels on the first road surface for more than a first predetermined distance, and the prototype vehicle or assembled vehicle travels on the second road surface for more than a second predetermined distance, wherein the second road surface is bumpier than the first road surface, and the first predetermined distance is longer than the second predetermined distance. For example, the first road surface is an ordinary road surface, and the second road surface is a bumpy road surface. The first predetermined distance is 1,000 kilometers, and the second predetermined distance is 5 kilometers.
[0040] In the related art, the air suspension vehicle height calibration usually has only two steps: virtual vehicle height mapping relationship calibration and production line vehicle height offset calibration. The vehicle height mapping relationship and offset are calibrated only once in the whole process. Since the virtual vehicle height mapping relationship calibration refers to the idealized three-dimensional model of the whole vehicle, it fails to fully consider the errors caused by the assembly and deformation of the rubber parts of the whole vehicle, which leads to a large error in the vehicle height mapping relationship after calibration. The accuracy of the vehicle height calibration directly affects the accuracy of the vehicle height adjustment. In this optional implementation, a method is provided to gradually improve the accuracy of the air suspension system vehicle height calibration, from early virtual calibration, to real vehicle calibration update, and then to production line calibration. This optional implementation is described below.
[0041] In this optional embodiment, the method for optimizing the calibration accuracy of the electronically controlled air suspension vehicle height includes a coarse calibration of a virtual vehicle height mapping relationship (map), a fine calibration of a real vehicle height mapping relationship, and a calibration of a production line vehicle height offset (offset).
[0042] Rough calibration of virtual vehicle height mapping relationship: Figure 2 is a flow chart of a virtual vehicle height mapping relationship according to an optional implementation manner of the present invention. Figure 2As shown in the figure, in the early development stage, there is no prototype vehicle yet, and it is necessary to confirm the rationality of the sensor layout through virtual calibration, and at the same time provide the initial vehicle height calibration table required by the vehicle height controller (corresponding to the above-mentioned virtual vehicle height mapping relationship). Virtual calibration process: build a three-dimensional model of the whole vehicle and complete the layout of the height sensor at the same time; refer to the suspension hard point parameters output by the dynamic calculation in the whole vehicle controller, and build a diesel multiple unit (DMU) model; confirm the rationality of the height sensor layout and the rationality of the travel range setting through DMU motion verification; if the height sensor layout is confirmed to be reasonable, record the mapping table of tire jump space (i.e. wheel jump) and sensor swing angle. If it is unreasonable, redesign the layout plan; by consulting the sensor manual, convert the wheel jump and sensor swing angle mapping table into a mapping table of vehicle height and sensor output voltage. This is the virtual vehicle height mapping relationship, which is used as a reference for the initial vehicle height adjustment of the vehicle height controller, and the virtual vehicle height mapping relationship calibration process is completed.
[0043] Precise calibration of real vehicle height mapping relationship: Figure 3 is a flow chart of the vehicle height mapping relationship of a real vehicle according to an optional implementation manner of the present invention, such as Figure 3 As shown in the figure, in the middle and late stages of vehicle model development, a stable and consistent prototype can be assembled. Through the precise calibration of the real vehicle height mapping relationship, the accuracy of the virtual vehicle height mapping relationship can be improved. Real vehicle calibration process: prepare a certain number (for example, 10) of engineering prototypes with good consistency; update the virtual vehicle height mapping relationship to the vehicle height controller; roughly calibrate the vehicle height to confirm the offset caused by assembly errors; 10 prototypes are respectively tested for 1,000 kilometers (i.e., the first road test process mentioned above) to fully release the internal stress of the rubber parts of the vehicle. It should be noted that internal stress refers to the stress that remains inside an object after the external load is removed. It is caused by uneven volume changes in the macroscopic or periscopic tissue inside the material. For the 10 prototypes, 20 points are sampled at equal intervals within the full wheel jump stroke. At each sampling point, a laser scanner is used to accurately measure the vehicle height and the output voltage of the height sensor, and finally 10 mapping tables of vehicle height and sensor output voltage are obtained; the vehicle height and voltage values at the 20 sampling points in the 10 mapping tables are averaged to obtain the actual vehicle height calibration mapping relationship, thus completing the actual vehicle height mapping relationship calibration process.
[0044] Calibration of vehicle height offset on production line: Figure 4 is a flow chart of calibrating the vehicle height offset of a production line according to an optional embodiment of the present invention, such as Figure 4As shown, in order to eliminate the vehicle height error caused by the actual vehicle assembly error, it is necessary to calibrate the vehicle height offset on the production line. Production line vehicle height offset calibration process: After the vehicle assembly is completed, the first wheel steering angle sensor and four-wheel alignment parameter calibration are carried out; after completing the above calibration, a 5-kilometer bumpy road test (i.e. the second road test process mentioned above) is required to fully release the internal stress of the rubber parts of the vehicle; after the road test is completed, return to the production line, measure the actual vehicle height and transmit the actual vehicle height back to the vehicle height controller, the vehicle height controller compares the actual vehicle height with the stored vehicle height corresponding to the actual vehicle calibration mapping relationship stored in the vehicle height controller, and confirms the vehicle height offset value caused by the assembly error; finally, the second wheel steering angle sensor and four-wheel alignment parameter calibration are carried out, and the production line vehicle height offset calibration is completed.
[0045] It should be noted that, in this optional implementation mode:
[0046] (1) Vehicle height control requires reference to two parameters: vehicle height mapping and offset. The vehicle height mapping is the correspondence between vehicle height and vehicle height sensor voltage under idealized assembly; the offset is a correction value introduced to eliminate assembly inconsistency of the sample vehicle caused by assembly error.
[0047] (2) Before each round of vehicle height calibration, it is necessary to consider whether it is necessary to eliminate the internal stress of the rubber parts after the new vehicle rolls off the assembly line. There are two main ways to eliminate internal stress: it can be eliminated through a road test on ordinary roads for more than 1,000 kilometers; it can also be eliminated quickly through a short-distance bumpy road test;
[0048] (3) During real vehicle calibration, in order to eliminate assembly inconsistencies, multiple vehicles are used for calibration, and then the impact of assembly inconsistencies is eliminated by taking the average.
[0049] According to another aspect of the embodiment of the present invention, a vehicle height calibration processing device is also provided. Figure 5 is a structural block diagram of a vehicle height calibration processing device provided according to an embodiment of the present invention. Figure 5 As shown, the device includes: a determination module 52, a first acquisition module 54, a generation module 56, a second acquisition module 58 and a correction module 50. The device is described below.
[0050] A determination module 52 is used to determine a virtual vehicle height mapping relationship between a vehicle height and an output voltage of a vehicle height sensor based on a virtual vehicle model of a target vehicle; a first acquisition module 54 is connected to the determination module 52 and is used to obtain test data of a sample vehicle corresponding to the virtual vehicle model during a first road test based on the virtual vehicle height mapping relationship, wherein the test data includes: a test vehicle height at a plurality of test points and an output voltage of a test vehicle height sensor; a generation module 56 is connected to the first acquisition module 54 and is used to generate a real vehicle height mapping relationship between a vehicle height and an output voltage of a vehicle height sensor based on the test data; a second acquisition module 58 is connected to the generation module 56 and is used to obtain a production line vehicle height correction amount corresponding to an assembled real vehicle after the target vehicle is assembled on the production line and undergoes a second road test; a correction module 50 is connected to the second acquisition module 58 and is used to correct the real vehicle height mapping relationship using the production line vehicle height correction amount to obtain a target vehicle height mapping relationship for the target vehicle
[0051] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein when the program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned vehicle height calibration processing methods.
[0052] According to another aspect of an embodiment of the present invention, a computer device is provided, including: a memory and a processor, the memory storing a computer program; the processor, configured to execute the computer program stored in the memory, wherein when the computer program is executed, the processor executes any one of the above-mentioned vehicle height calibration processing methods.
[0053] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.
[0054] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0055] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.
[0056] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
[0057] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
[0058] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.
[0059] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.
Claims
1. A vehicle height calibration method, characterized in that: include: Based on the virtual prototype model of the target vehicle, a virtual vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor is determined; Based on the virtual vehicle height mapping relationship, acquiring test data of the sample vehicle corresponding to the virtual sample vehicle model during the first road test, wherein the test data includes: the test vehicle height at multiple test points and the output voltage of the test vehicle height sensor; Based on the test data, a real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor is generated; Obtaining a production line vehicle height correction amount corresponding to the assembled actual vehicle after the target vehicle is assembled on the production line and undergoes a second road test process; The actual vehicle height mapping relationship is corrected by using the production line vehicle height correction amount to obtain a target vehicle height mapping relationship of the target vehicle; Among them, based on the virtual vehicle height mapping relationship, obtaining the test data of the sample vehicle corresponding to the virtual sample vehicle model during the first road test includes: determining the sample vehicle height correction amount caused by sample vehicle assembly; correcting the virtual vehicle height mapping relationship using the sample vehicle height correction amount to obtain the sample vehicle height mapping relationship; obtaining the test data of the sample vehicle corresponding to the virtual sample vehicle model during the first road test under the sample vehicle height mapping relationship.
2. The method according to claim 1, characterized in that The generating, based on the test data, a real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor comprises: In the case where there are multiple sample vehicles, determining a vehicle height mapping relationship between vehicle heights corresponding to the multiple sample vehicles and output voltages of vehicle height sensors based on multiple groups of test data corresponding to the multiple sample vehicles; The vehicle height mapping relationships corresponding to the plurality of sample vehicles are averaged to obtain the actual vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor.
3. The method according to claim 1, characterized in that The generating, based on the test data, a real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor comprises: In the case where there are multiple sample vehicles, averaging multiple groups of test data corresponding to the multiple sample vehicles at the multiple test points to obtain average values corresponding to the multiple test points; Based on the corresponding average values at the multiple test points, the actual vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor is obtained.
4. The method according to claim 1, characterized in that: The obtaining of the production line vehicle height correction value corresponding to the assembled actual vehicle after the target vehicle is assembled on the production line and undergoes the second road test process includes: After subjecting the target vehicle to the second road test, the vehicle height of the assembled vehicle is measured to obtain the actual vehicle height. Obtaining the stored vehicle height stored in the vehicle controller in the assembled actual vehicle; The difference between the actual vehicle height and the stored vehicle height is determined as the production line vehicle height correction amount.
5. The method according to any one of claims 1 to 4, characterized in that During the first road test, the prototype vehicle fully releases the internal stress of the rubber parts of the vehicle; During the second road test, the assembled vehicle fully releases the internal stress of the rubber parts of the vehicle.
6. The method according to claim 5, characterized in that The prototype vehicle or the assembled vehicle fully releases the internal stress of the rubber parts of the vehicle by at least one of the following methods: The prototype vehicle or the assembled vehicle travels on a first road surface for more than a first predetermined distance, and the prototype vehicle or the assembled vehicle travels on a second road surface for more than a second predetermined distance, wherein the second road surface is bumpier than the first road surface, and the first predetermined distance is longer than the second predetermined distance.
7. A vehicle height calibration processing device, characterized in that: include: A determination module, used for determining a virtual vehicle height mapping relationship between a vehicle height and an output voltage of a vehicle height sensor based on a virtual prototype vehicle model of a target vehicle; A first acquisition module is used to acquire test data of a sample vehicle corresponding to the virtual sample vehicle model during a first road test based on the virtual vehicle height mapping relationship, wherein the test data includes: a test vehicle height at a plurality of test points and an output voltage of a test vehicle height sensor; A generating module, used for generating a real vehicle height mapping relationship between the vehicle height and the output voltage of the vehicle height sensor based on the test data; A second acquisition module is used to obtain a production line vehicle height correction value corresponding to the assembled actual vehicle after the target vehicle is assembled on the production line and undergoes a second road test process; A correction module, used to correct the actual vehicle height mapping relationship by using the production line vehicle height correction amount to obtain a target vehicle height mapping relationship of the target vehicle; Among them, the first acquisition module is also used to: determine the sample vehicle height correction amount caused by sample vehicle assembly; use the sample vehicle height correction amount to correct the virtual vehicle height mapping relationship to obtain the sample vehicle height mapping relationship; obtain the test data of the sample vehicle corresponding to the virtual sample vehicle model under the sample vehicle height mapping relationship during the first road test.
8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the vehicle height calibration processing method according to any one of claims 1 to 6.
9. A computer device, characterized in that: include: Memory and processor, The memory stores a computer program; The processor is used to execute the computer program stored in the memory, and when the computer program is running, the processor executes the vehicle height calibration processing method according to any one of claims 1 to 6.