Height calibration method and device for vehicle ECAS system

Abstract

The invention relates to a height calibration method and device for a vehicle ECAS system, and belongs to the technical field of vehicle control, and the height calibration method for the vehicle ECAS system comprises the steps that an ECAS remote controller is controlled to sequentially adjust the actual height of a target air spring of a vehicle to an upper limit position, a zero position and a lower limit position; obtaining a first sampling value, a second sampling value and a third sampling value; and performing height calibration on the target air spring based on the first sampling value, the second sampling value and the third sampling value. According to the invention, the height calibration of the ECAS system can be completed without going to a vehicle service station, the efficiency of the height calibration of the ECAS system is improved, and the time spent on the height calibration of the ECAS system by a user is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a method and device for calibrating the height of an ECAS system of a vehicle. Background Art

[0002] The correctness and accuracy of the height calibration of the air suspension electronic control system will directly affect the performance of the electronic-controlled air suspension (ECAS) system, and have a great impact on the vehicle's driving smoothness, comfort, operational stability and safety. In recent years, the ECAS system in the market has frequently encountered problems such as cabin tilt and zero height being too high or too low. These problems often require users to drive the vehicle to a service station to recalibrate the ECAS height to solve them, which brings great inconvenience to users.

[0003] The height calibration of the existing ECAS system is extremely dependent on service station diagnostic equipment. Users cannot correct the height characteristics by themselves using existing vehicle resources, and need to spend a lot of time going to the service station for recalibration. Summary of the invention

[0004] In view of this, it is necessary to provide a method and device for calibrating the height of a vehicle ECAS system, so as to solve the problem that the height calibration of the existing ECAS system can only be completed at a service station and takes a lot of time.

[0005] In order to solve the above problem, the present invention provides a method for calibrating the height of a vehicle ECAS system, comprising: Control the ECAS remote control to adjust the actual height of the vehicle's target air spring to the upper limit position, the zero position and the lower limit position in sequence; Obtaining a first sampling value, a second sampling value, and a third sampling value; Based on the first sampling value, the second sampling value and the third sampling value, calibrate the height of the target air spring; The first sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the second sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the zero position, and the third sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the lower limit position.

[0006] In a possible implementation, the performing height calibration on the target air spring based on the first sampling value, the second sampling value, and the third sampling value includes: Based on the first sampling value, the second sampling value, and the third sampling value, as well as the first default value, the second default value, and the third default value, calibrating the height of the target air spring; The first default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the upper limit position; the second default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the zero position; the third default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the lower limit position.

[0007] In a possible implementation, the height calibration of the target air spring based on the first sampling value, the second sampling value, the third sampling value, and the first default value, the second default value, and the third default value includes: Based on the first default value, the second default value, the third default value, and a verification parameter, performing a validity verification on the first sampling value, the second sampling value, and the third sampling value; When the validity verification of the first sampling value, the second sampling value and the third sampling value is passed, the target air spring is height calibrated based on the difference between the first sampling value and the first default value, the difference between the second sampling value and the second default value, the difference between the third sampling value and the third default value, and a correction parameter, and the correction parameter is determined based on the model of the target air spring.

[0008] In a possible implementation, performing validity verification on the first sampled value, the second sampled value, and the third sampled value based on the first default value, the second default value, the third default value, and a verification parameter includes: The validity of the first sampling value, the second sampling value and the third sampling value is checked based on the following formula:

[0009] in, , , represent the first sampling value, the second sampling value and the third sampling value respectively, , , represent the first default value, the second default value and the third default value respectively, represents the inspection parameter.

[0010] In a possible implementation, the height calibration of the target air spring based on the differences between the first sampling value, the second sampling value, and the third sampling value and the first default value, the second default value, and the third default value, and a correction parameter includes: The target air spring is height-calibrated based on the following formula:

[0011] in, , , represent the first sampling value, the second sampling value and the third sampling value respectively, , , represent the first default value, the second default value and the third default value respectively, , , represent the fourth default value, the fifth default value, and the sixth default value respectively, Represents the correction parameter, the fourth default value, the fifth default value and the sixth default value are the default values ​​of the readings of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the zero position and the lower limit position after height calibration.

[0012] In a possible implementation, the method further includes: Based on the fourth default value, the fifth default value and the sixth default value, and the actual height of the target air spring when it is adjusted to the upper limit position, the zero position and the lower limit position, a linear fitting is performed to obtain a target function; The slope and intercept of the target function are determined as height characteristic parameters of the target air spring.

[0013] In a possible implementation, the target air spring includes: Air spring on the left side of the vehicle's front axle, air spring on the right side of the vehicle's front axle, air spring on the left side of the vehicle's rear axle or air spring on the right side of the vehicle's rear axle.

[0014] The present invention also provides a height calibration device for a vehicle ECAS system, comprising: A control module, used for controlling the ECAS remote controller to adjust the actual height of the target air spring of the vehicle to an upper limit position, a zero position and a lower limit position in sequence; An acquisition module, used for acquiring a first sampling value, a second sampling value and a third sampling value; A calibration module, configured to calibrate the height of the target air spring based on the first sampling value, the second sampling value and the third sampling value; The first sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the second sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the zero position, and the third sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the lower limit position.

[0015] The present invention also provides an electronic device, including a memory and a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the altitude calibration method of the vehicle ECAS system as described above is implemented.

[0016] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for calibrating the height of the vehicle ECAS system as described above is implemented.

[0017] The beneficial effects of the present invention are as follows: the height calibration method and device of the vehicle ECAS system provided by the present invention first adjust the actual height of the target air spring of the vehicle to the upper limit position, the zero position and the lower limit position in sequence, and then obtain the reading sampling value of the height sensor corresponding to the target air spring at the corresponding position. Since the upper limit position, the zero position and the lower limit position of the air spring itself will not change, the height calibration of the target air spring can be achieved through the reading sampling value of the height sensor corresponding to the target air spring at the corresponding position. The present invention can complete the height calibration of the ECAS system without going to a vehicle service station, thereby improving the efficiency of the height calibration of the ECAS system and reducing the time spent by the user on the height calibration of the ECAS system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic flow chart of an embodiment of a method for calibrating the height of an ECAS system of a vehicle provided by the present invention; Figure 2 A schematic flow chart of an embodiment of a vehicle ECAS system altitude calibration process provided by the present invention; Figure 3 A schematic structural diagram of an embodiment of a height calibration device for a vehicle ECAS system provided by the present invention; Figure 4 A schematic structural diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0020] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] In the description of the present invention, reference to an "embodiment" means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the described embodiments may be combined with other embodiments.

[0022] The correctness and accuracy of the height calibration of the air suspension electronic control system will directly affect the performance of the ECAS system, and have a great impact on the vehicle's driving smoothness, comfort, operational stability and safety. In recent years, the ECAS system in the market has frequently encountered problems such as cabin tilt and zero height being too high or too low. These problems often require users to drive the vehicle to a service station to recalibrate the ECAS height to solve them, which brings great inconvenience to users.

[0023] The height calibration of the existing ECAS system is extremely dependent on service station diagnostic equipment. Users cannot correct the height characteristics by themselves using existing vehicle resources, and need to spend a lot of time going to the service station for recalibration.

[0024] The ECAS system consists of ECU, height sensor, solenoid valve, pressure sensor, remote control, etc. The height sensor measures the height signal between the chassis and the axle and transmits it to the ECU. The ECU also receives other signals, such as vehicle speed, braking status, axle difference / wheel difference, air pressure, etc., and integrates all input information. Then, according to the control parameters and height control indicators set in the ECU, it stimulates the corresponding action of the solenoid valve to form a closed-loop control system, inflates each airbag, and adjusts the chassis to the target height.

[0025] In order to solve the above problem, the present invention proposes a height calibration method for a vehicle ECAS system.

[0026] The specific embodiments are described in detail below: A specific embodiment of the present invention discloses a method for calibrating the height of a vehicle ECAS system, combining Figure 1 Come and see, Figure 1 The flowchart of an embodiment of a method for calibrating the height of an ECAS system of a vehicle provided by the present invention includes steps S101 to S103, wherein: In step S101, the ECAS remote controller is controlled to adjust the actual height of the target air spring of the vehicle to the upper limit position, the zero position and the lower limit position in sequence; In step S102, a first sampling value, a second sampling value and a third sampling value are obtained; In step S103, the target air spring is height-calibrated based on the first sampling value, the second sampling value, and the third sampling value; The first sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the second sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the zero position, and the third sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the lower limit position.

[0027] During implementation, since the inaccuracy of the ECAS system is mainly due to the inaccuracy of the sampling value of the air spring by the height sensor after the vehicle has been running for a period of time outside the factory, the upper limit position, zero position and lower limit position of the air spring itself will not change. Therefore, the existing ECAS remote control can be controlled to adjust the actual height of the vehicle's target air spring to the upper limit position, zero position and lower limit position in sequence. The target air spring can be the air spring of the vehicle that needs to be calibrated in height, which may be a single air spring or multiple air springs. The present invention does not make specific limitations on this.

[0028] Next, the reading sampling values ​​of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the zero position and the lower limit position, ie, the first sampling value, the second sampling value and the third sampling value, can be obtained.

[0029] Finally, the height calibration of the target air spring can be completed according to the first sampling value, the second sampling value and the third sampling value. The above process can be completed without going to a vehicle service station.

[0030] Compared with the prior art, the height calibration method of the vehicle ECAS system provided in this embodiment first adjusts the actual height of the target air spring of the vehicle to the upper limit position, the zero position and the lower limit position in sequence, and then obtains the reading sampling value of the height sensor corresponding to the target air spring at the corresponding position. Since the upper limit position, the zero position and the lower limit position of the air spring itself do not change, the height calibration of the target air spring can be achieved through the reading sampling value of the height sensor corresponding to the target air spring at the corresponding position. The present invention can complete the height calibration of the ECAS system without going to a vehicle service station, thereby improving the efficiency of the height calibration of the ECAS system and reducing the time spent by the user on the height calibration of the ECAS system.

[0031] Exemplarily, the performing height calibration on the target air spring based on the first sampling value, the second sampling value, and the third sampling value includes: Based on the first sampling value, the second sampling value, and the third sampling value, as well as the first default value, the second default value, and the third default value, calibrating the height of the target air spring; The first default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the upper limit position; the second default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the zero position; the third default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the lower limit position.

[0032] Specifically, when the target air spring is height calibrated according to the first sampling value, the second sampling value and the third sampling value, the default value of the reading of the height sensor corresponding to the target air spring in the previous height calibration when the actual height of the target air spring is adjusted to the upper limit position, the zero position and the lower limit position can also be obtained as the first default value, the second default value and the third default value, and then the target air spring is height calibrated according to the first sampling value, the second sampling value and the third sampling value, as well as the first default value, the second default value and the third default value.

[0033] Exemplarily, the height calibration of the target air spring based on the first sampling value, the second sampling value, the third sampling value, and the first default value, the second default value, and the third default value includes: Based on the first default value, the second default value, the third default value, and a verification parameter, performing a validity verification on the first sampling value, the second sampling value, and the third sampling value; When the validity verification of the first sampling value, the second sampling value and the third sampling value is passed, the target air spring is height calibrated based on the difference between the first sampling value and the first default value, the difference between the second sampling value and the second default value, the difference between the third sampling value and the third default value, and a correction parameter, and the correction parameter is determined based on the model of the target air spring.

[0034] Specifically, when calibrating the height of the target air spring according to the first sampling value, the second sampling value and the third sampling value, and the first default value, the second default value and the third default value, it is first necessary to verify the validity of the first sampling value, the second sampling value and the third sampling value according to the first default value, the second default value and the third default value and the verification parameters to avoid the error during sampling affecting the height calibration result.

[0035] When the validity check of the first sampling value, the second sampling value and the third sampling value passes, the height of the target air spring can be calibrated according to the difference between the first sampling value, the second sampling value and the third sampling value and the first default value, the second default value and the third default value, and the correction parameter. The correction parameter can be determined according to the model of the target air spring and can be set to 1 in general.

[0036] When any of the first sampling value, the second sampling value and the third sampling value fails to pass the validity verification, the actual height of the target air spring can be readjusted and the corresponding sampling value can be obtained, and then the height calibration can be performed to improve the accuracy of the height calibration.

[0037] Exemplarily, performing validity verification on the first sampled value, the second sampled value, and the third sampled value based on the first default value, the second default value, and the third default value, and a verification parameter, includes: The validity of the first sampling value, the second sampling value and the third sampling value is checked based on the following formula:

[0038] in, , , represent the first sampling value, the second sampling value and the third sampling value respectively, , , represent the first default value, the second default value and the third default value respectively, represents the inspection parameter.

[0039] Specifically, when performing validity verification on the first sampling value, the second sampling value, and the third sampling value, the validity verification may be performed using the above formula.

[0040] Exemplarily, the height calibration of the target air spring based on the differences between the first sampling value, the second sampling value, and the third sampling value and the first default value, the second default value, and the third default value, and a correction parameter includes: The target air spring is height-calibrated based on the following formula:

[0041] in, , , represent the first sampling value, the second sampling value and the third sampling value respectively, , , represent the first default value, the second default value and the third default value respectively, , , represent the fourth default value, the fifth default value, and the sixth default value respectively, Represents the correction parameter, the fourth default value, the fifth default value and the sixth default value are the default values ​​of the readings of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the zero position and the lower limit position after height calibration.

[0042] Specifically, after the first sampling value, the second sampling value, and the third sampling value pass the validity check, the height of the target air spring can be calibrated using the above formula.

[0043] Exemplarily, the method further includes: Based on the fourth default value, the fifth default value and the sixth default value, and the actual height of the target air spring when it is adjusted to the upper limit position, the zero position and the lower limit position, a linear fitting is performed to obtain a target function; The slope and intercept of the target function are determined as height characteristic parameters of the target air spring.

[0044] Specifically, after completing the height calibration of the target air spring, the height characteristic parameters of the target air spring can also be calibrated using the fourth default value, the fifth default value and the sixth default value, as well as the actual height when the target air spring is adjusted to the upper limit position, the zero position and the lower limit position.

[0045] When calibrating the height characteristic parameters of the target air spring, the fourth default value, the fifth default value and the sixth default value can be used as independent variables, and the actual height of the target air spring when adjusted to the upper limit position, the zero position and the lower limit position can be used as independent variables for linear fitting to obtain the objective function, such as by least squares method, gradient descent method, etc.

[0046] After the objective function is obtained, the slope and intercept of the objective function may be determined as height characteristic parameters of the target air spring.

[0047] Exemplarily, the target air spring comprises: Air spring on the left side of the vehicle's front axle, air spring on the right side of the vehicle's front axle, air spring on the left side of the vehicle's rear axle or air spring on the right side of the vehicle's rear axle.

[0048] Specifically, the target air spring may be any one of an air spring on the left side of a front axle of the vehicle, an air spring on the right side of a front axle of the vehicle, an air spring on the left side of a rear axle of the vehicle, or an air spring on the right side of a rear axle of the vehicle.

[0049] The technical solution of the present invention is better described below with reference to a specific embodiment: The height adjustment of the ECAS system can be achieved through the existing ECAS remote control, which will not be described in detail here.

[0050] Combination Figure 2 Come and see, Figure 2 This is a flow chart of an embodiment of a height calibration process of a vehicle ECAS system provided by the present invention. The specific process is as follows: 1. In the height sensor calibration mode, select the axis that needs height calibration, adjust the actual height of the air spring to the required calibration height, and the ECU stores the height sensor sampling value at this time.

[0051] 2. ECU starts to automatically perform self-learning of altitude zero calibration.

[0052] 3. Altitude calibration self-learning.

[0053] (1) Validity check: The ECU first performs a validity check on the currently required calibration value.

[0054] (2) Correction value calculation: After the validity check is passed, the ECU compares the current information required for calibration with the original default stored information and calculates the difference and correction value.

[0055] (3) Altitude correction: Correct the upper, zero and lower limits of the altitude and store them in the ECU to overwrite the original parameters.

[0056] (4) Update of height characteristic parameters: The ECU recalculates the height characteristic parameter values ​​by using a linear fitting algorithm. The recalculated height characteristic parameters are stored in the ECU to overwrite the original parameters, that is, the height offset parameters are corrected to ensure the accuracy of height acquisition.

[0057] 4. After the altitude zero calibration self-learning is completed (regardless of whether it is successful or not) or after pressing any other key, the altitude zero calibration is exited.

[0058] For example, for a vehicle frame with dual height sensors, the height sensor characteristics written into the ECU by default are as follows: Table 1: Height sensor characteristics

[0059] Due to the influence of some factors in actual use, the height sensor characteristics are inaccurate, causing the vehicle to tilt and be unable to be adjusted to a normal state through the suspension system, so the height zero position needs to be recalibrated.

[0060] 1. The user uses the remote control to adjust the height of the airbag, and adjusts the height of the left and right sides to the lower limit height of 180mm, the zero height of 300mm, and the upper limit height of 420mm respectively.

[0061] 2. Press the remote control button to trigger the altitude calibration self-learning.

[0062] 3. Validity test: read the current left and right TT values, , . , . , .

[0064] Inspection parameters Take 0.05, , , , , , , the validity test passed.

[0065] Correction calculation: Verification parameters Take 1, , . , . , .

[0066] Altitude Correction: .

[0067] .

[0068] At this time, the altitude readings calculated based on the altitude sampling values ​​on the left and right sides are corrected to be consistent with the actual altitude.

[0069] The present invention can improve user maintenance convenience, thereby improving user experience.

[0070] The embodiment of the present invention also provides a vehicle ECAS system height calibration device, combined with Figure 3 Come and see, Figure 3 The height calibration device 300 of the vehicle ECAS system provided by the present invention is a schematic diagram of a structure of an embodiment of the vehicle ECAS system. The height calibration device 300 of the vehicle ECAS system includes: The control module 301 is used to control the ECAS remote controller to adjust the actual height of the target air spring of the vehicle to an upper limit position, a zero position and a lower limit position in sequence; An acquisition module 302 is used to acquire a first sampling value, a second sampling value and a third sampling value; A calibration module 303, configured to perform height calibration on the target air spring based on the first sampling value, the second sampling value and the third sampling value; The first sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the second sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the zero position, and the third sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the lower limit position.

[0071] The specific implementation of each module of the height calibration device of the vehicle ECAS system can refer to the description of the height calibration method of the vehicle ECAS system, and has similar beneficial effects, which will not be repeated here.

[0072] The embodiment of the present invention further provides an electronic device, Figure 4 Come and see, Figure 4 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. The electronic device 400 includes a processor 401, a memory 402, and a computer program stored in the memory 402 and executable on the processor 401. When the processor 401 executes the program, the altitude calibration method of the vehicle ECAS system as described above is implemented.

[0073] As a preferred embodiment, the electronic device 400 further includes a display 403 for displaying the height calibration method of the vehicle ECAS system executed by the processor 401 as described above.

[0074] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 402, and executed by the processor 401 to complete the present invention. One or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program in the electronic device 400. For example, the computer program may be divided into the control module 301, the acquisition module 302, and the calibration module 303 in the above-mentioned embodiment, and the specific functions of each module are as described above, and are not described one by one here.

[0075] The electronic device 400 may be a desktop computer, a notebook, a PDA or a smart phone with an adjustable camera module.

[0076] Among them, the processor 401 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor 401 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0077] The memory 402 may be, but is not limited to, a random access memory (RAM), a read only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electric erasable programmable read-only memory (EEPROM), etc. The memory 402 is used to store programs, and the processor 401 executes the program after receiving the execution instruction. The process definition method disclosed in any of the embodiments of the present invention may be applied to the processor 401 or implemented by the processor 401.

[0078] The display 403 may be an LCD display screen or an LED display screen, for example, a display screen on a vehicle-mounted device.

[0079] Understandably, Figure 4 The structure shown is only a schematic diagram of the structure of the electronic device 400. The electronic device 400 may also include Figure 4 More or fewer components as shown. Figure 4 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0080] The electronic device provided according to the above embodiment of the present invention can be implemented with reference to the specific description of the method for calibrating the height of the vehicle ECAS system as described above according to the present invention, and has similar beneficial effects as the method for calibrating the height of the vehicle ECAS system as described above, which will not be described in detail here.

[0081] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the altitude calibration method of the vehicle ECAS system as described above is implemented.

[0082] Generally speaking, the computer instructions for implementing the method of the present invention can be carried by any combination of one or more computer-readable storage media. Non-transitory computer-readable storage media can include any computer-readable media except for the signal itself that is temporarily propagating.

[0083] Computer-readable storage media may be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more conductors, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium that contains or stores a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0084] Computer program codes for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages, in particular, Python suitable for neural network computing and platform frameworks based on TensorFlow, PyTorch, etc. may be used. The program code may be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0085] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0086] The present invention discloses a method and device for calibrating the height of an ECAS system of a vehicle. Firstly, the actual height of a target air spring of a vehicle is adjusted to an upper limit position, a zero position and a lower limit position in sequence. Then, a reading sampling value of a height sensor corresponding to the target air spring at a corresponding position is obtained. Since the upper limit position, the zero position and the lower limit position of the air spring itself do not change, the height calibration of the target air spring can be achieved through the reading sampling value of the height sensor corresponding to the target air spring at the corresponding position. The present invention can complete the height calibration of the ECAS system without going to a vehicle service station, thereby improving the efficiency of the height calibration of the ECAS system and reducing the time spent by the user on the height calibration of the ECAS system.

[0087] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for calibrating the height of a vehicle ECAS system, characterized in that: include: Control the ECAS remote control to adjust the actual height of the vehicle's target air spring to the upper limit position, the zero position and the lower limit position in sequence; Obtaining a first sampling value, a second sampling value, and a third sampling value; Based on the first sampling value, the second sampling value and the third sampling value, calibrate the height of the target air spring; The first sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the second sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the zero position, and the third sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the lower limit position.

2. The method for calibrating the height of the vehicle ECAS system according to claim 1, characterized in that: The step of calibrating the height of the target air spring based on the first sampling value, the second sampling value, and the third sampling value includes: Based on the first sampling value, the second sampling value, and the third sampling value, as well as the first default value, the second default value, and the third default value, calibrating the height of the target air spring; The first default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the upper limit position; the second default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the zero position; the third default value is the default value reading of the height sensor corresponding to the target air spring in the previous height calibration, when the actual height of the target air spring is adjusted to the lower limit position.

3. The method for calibrating the height of the vehicle ECAS system according to claim 2, characterized in that: The step of calibrating the height of the target air spring based on the first sampling value, the second sampling value, the third sampling value, and the first default value, the second default value, and the third default value includes: Based on the first default value, the second default value, the third default value, and a verification parameter, performing a validity verification on the first sampling value, the second sampling value, and the third sampling value; When the validity verification of the first sampling value, the second sampling value and the third sampling value is passed, the target air spring is height calibrated based on the difference between the first sampling value and the first default value, the difference between the second sampling value and the second default value, the difference between the third sampling value and the third default value, and a correction parameter, and the correction parameter is determined based on the model of the target air spring.

4. The method for calibrating the height of the vehicle ECAS system according to claim 3, characterized in that: The performing validity check on the first sampling value, the second sampling value, and the third sampling value based on the first default value, the second default value, and the third default value, and a check parameter, comprises: The validity of the first sampling value, the second sampling value and the third sampling value is checked based on the following formula: in, , , represent the first sampling value, the second sampling value and the third sampling value respectively, , , represent the first default value, the second default value and the third default value respectively, represents the inspection parameter.

5. The method for calibrating the height of the vehicle ECAS system according to claim 3, characterized in that: The method of calibrating the height of the target air spring based on the differences between the first sampling value, the second sampling value, and the third sampling value and the first default value, the second default value, and the third default value, and a correction parameter, comprises: The target air spring is height-calibrated based on the following formula: in, , , represent the first sampling value, the second sampling value and the third sampling value respectively, , , represent the first default value, the second default value and the third default value respectively, , , represent the fourth default value, the fifth default value, and the sixth default value respectively, Represents the correction parameter, the fourth default value, the fifth default value and the sixth default value are the default values ​​of the readings of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the zero position and the lower limit position after height calibration.

6. The method for calibrating the height of the vehicle ECAS system according to claim 5, characterized in that: The method further comprises: Based on the fourth default value, the fifth default value and the sixth default value, and the actual height of the target air spring when it is adjusted to the upper limit position, the zero position and the lower limit position, a linear fitting is performed to obtain a target function; The slope and intercept of the target function are determined as height characteristic parameters of the target air spring.

7. The method for calibrating the height of a vehicle ECAS system according to any one of claims 1 to 6, characterized in that: The target air spring comprises: Air spring on the left side of the vehicle's front axle, air spring on the right side of the vehicle's front axle, air spring on the left side of the vehicle's rear axle or air spring on the right side of the vehicle's rear axle.

8. A height calibration device for a vehicle ECAS system, characterized in that: include: A control module, used for controlling the ECAS remote controller to adjust the actual height of the target air spring of the vehicle to an upper limit position, a zero position and a lower limit position in sequence; An acquisition module, used for acquiring a first sampling value, a second sampling value and a third sampling value; A calibration module, configured to calibrate the height of the target air spring based on the first sampling value, the second sampling value and the third sampling value; The first sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the upper limit position, the second sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the zero position, and the third sampling value is the reading sampling value of the height sensor corresponding to the target air spring when the actual height of the target air spring is adjusted to the lower limit position.

9. An electronic device, characterized in that: The invention comprises a memory and a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for calibrating the height of the vehicle ECAS system according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor, the method for calibrating the height of the vehicle ECAS system as claimed in any one of claims 1 to 7 is implemented.

Images