A method, system, and storage medium for calibrating vehicle height with air suspension.

Abstract

The vehicle height calibration method, system and storage medium of air suspension relate to the field of vehicle height calibration technology, solve the problems of complex operation and easy error in existing methods, and can be applied to the automatic calibration of vehicle height of trial-produced prototype vehicles. The calibration method includes: the vehicle controller identifies whether the vehicle meets the calibration conditions; the vehicle controller adjusts the suspension posture to Motorway and then rises to Normal state; the vehicle controller sends a vehicle height calibration request to a mobile laser measuring instrument; after receiving the height data information measured by the mobile laser measuring instrument, the vehicle controller writes it in sequence to complete the vehicle height calibration; the vehicle controller adjusts the suspension posture to Motorway and then rises to Normal state, sends a calibration signal to the mobile laser measuring instrument, and after confirming that the calibration is correct, sends it to the laser measuring instrument screen for display.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle height calibration, and in particular to a vehicle height calibration technology for an air suspension. Background Art

[0002] With the development of economy, consumers have higher and higher requirements for vehicles. High-quality vehicles must have both the comfort of sedans and the passability of off-road vehicles. Air suspension is the best choice to achieve this goal and is also the future development trend.

[0003] At present, the vehicle height calibration of the trial-produced vehicle equipped with air suspension requires the host computer to communicate with the vehicle controller through the CAN communication diagnostic equipment, and then send a command through the host computer to reset the vehicle height information, and manually measure the vehicle height and write it into the software to complete the calibration. Specifically, after the whole vehicle is assembled, it is necessary to calibrate the vehicle height sensor after the bumps on the corrugated road, manually identify the gear information, the power status of the whole vehicle, whether the vehicle can be in an unloaded state, and whether each controller reports an error. After the identification is correct, the vehicle suspension height is changed through the host computer and then restored to Normal. After completing the pre-calibration preparation work, the calibration work begins, the vehicle height information is reset through the host computer software, and the height from the wheel center to the wheel eyebrow of the four wheels is measured in turn, and filled in the corresponding vehicle height parameters in the host computer, and click Confirm to complete the calibration work. This method has two disadvantages: 1. The operation is complicated, and it is necessary to manually operate one by one according to the process, and there is an inevitable risk of manual error and wrong operation; 2. There is a certain measurement error in manual measurement; 3. The labor cost is high, and the calibration requires at least two people to cooperate to complete the calibration work. Summary of the invention

[0004] In order to solve the problems of complex operation and easy error in the existing method, the present invention proposes a vehicle height calibration method for air suspension.

[0005] A vehicle height calibration method for an air suspension is based on a vehicle controller, and the method comprises the following steps:

[0006] S1. The vehicle controller identifies whether the vehicle meets the calibration conditions. If so, it enters the calibration mode. If not, it adjusts the vehicle state until the calibration conditions are met.

[0007] S2, the vehicle controller adjusts the suspension posture to Motorway, and then to Normal state;

[0008] S3, the vehicle controller resets the reserved original vehicle height information and sends a vehicle height calibration request to the mobile laser measuring instrument;

[0009] S4, after receiving the height data information measured by the mobile laser measuring instrument, the vehicle controller writes it in sequence to complete the vehicle height calibration;

[0010] S5. The vehicle controller adjusts the suspension posture to Motorway and then rises to Normal state, sends a calibration signal to the mobile laser measuring instrument, and the vehicle controller verifies the actual height information fed back by the mobile laser measuring instrument with the calibrated height. After confirming that the calibration is correct, the confirmed calibration result is sent to the laser measuring instrument screen for display.

[0011] Preferably, the calibration conditions in step S1 include:

[0012] (1) The gear position information of the vehicle should be in P gear;

[0013] (2) The electronic parking brake should be in the released state;

[0014] (3) When calibrating the steering wheel angle information, the four wheels should be returned to the center, and the steering angle should be within 4° to meet the calibration conditions;

[0015] (4) The vehicle power status should be Ignition On or ignition status;

[0016] (5) The vehicle should be in an unloaded state and no node should report an error on the network.

[0017] The present invention also provides a vehicle height calibration method for an air suspension, based on a mobile laser measuring instrument, the method comprising the following steps:

[0018] S1, the mobile laser measuring instrument receives the vehicle height calibration request sent by the vehicle controller, starts to move along the guide rail, obtains the vehicle height data by laser ranging, and sends it to the vehicle controller;

[0019] S2. The mobile laser measuring instrument receives the calibration signal sent by the vehicle controller, measures the height data of the vehicle again and sends it to the vehicle controller. The mobile laser measuring instrument displays the calibration result of the vehicle controller on the screen after the calibration is correct.

[0020] Preferably, the mobile laser measuring instrument includes a CAN wireless transceiver module, a data acquisition module, a data processing module and a data display module. The CAN wireless transceiver module is used to receive a request signal from the vehicle controller and send data to the vehicle controller. The data processing module processes the data collected by the data acquisition module. The data display module is used to display the calibration results.

[0021] Preferably, the height data of the vehicle in step S1 includes height data of the four wheels of the vehicle, specifically, the height data of the four wheels are obtained by sequentially measuring the height from the lower edge of the wheel arch of the four wheels to the ground and subtracting it from the radius of the four wheels respectively.

[0022] Preferably, the method further comprises the following preparatory steps before calibration:

[0023] (1) Park the vehicle at a designated location and determine whether the vehicle meets the calibration conditions. If the conditions are met, the vehicle enters the calibration mode. If not, the vehicle status is adjusted until the conditions are met.

[0024] (2) The vehicle controller adjusts the suspension posture to Motorway and then to Normal.

[0025] Preferably, the calibration conditions include:

[0026] (1) The gear position information of the vehicle should be in P gear;

[0027] (2) The electronic parking brake should be in the released state;

[0028] (3) When calibrating the steering wheel angle information, the four wheels should be returned to the center, and the steering angle should be within 4° to meet the calibration conditions;

[0029] (4) The vehicle power status should be Ignition On or ignition status;

[0030] (5) The vehicle should be in an unloaded state and no node should report an error on the network.

[0031] The present invention also provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program, wherein the computer program executes the vehicle height calibration method of the air suspension as described above.

[0032] The present invention also provides a vehicle height calibration system for an air suspension, the system comprising a vehicle controller, the above-mentioned mobile laser measuring instrument and a guide rail.

[0033] Compared with the prior art, the present invention solves the problems of complex operation and prone to errors, and has the following specific beneficial effects:

[0034] The present invention completes the automatic calibration of the vehicle height through the signal interaction between the mobile laser measuring instrument and the vehicle controller. The operation is simple, no manual measurement and calibration are required, labor costs are saved, manual measurement errors are eliminated, and the accuracy and consistency of the calibration are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of calculating the height data of the four wheels described in Example 5;

[0036] Figure 2 This is a schematic diagram of the calibration system described in Example 9;

[0037] Figure 3 This is a schematic diagram of the calibration method flow described in Example 9. DETAILED DESCRIPTION

[0038] In order to make the technical solution of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the specification of the present invention. It should be noted that the following embodiments are only used to better understand the technical solution of the present invention and should not be understood as a limitation to the present invention.

[0039] Example 1.

[0040] This embodiment provides a vehicle height calibration method for an air suspension, based on a vehicle controller, the method comprising the following steps:

[0041] S1. The vehicle controller identifies whether the vehicle meets the calibration conditions. If so, it enters the calibration mode. If not, it adjusts the vehicle state until the calibration conditions are met.

[0042] S2, the vehicle controller adjusts the suspension posture to Motorway, and then to Normal state;

[0043] S3, the vehicle controller resets the reserved original vehicle height information and sends a vehicle height calibration request to the mobile laser measuring instrument;

[0044] S4, after receiving the height data information measured by the mobile laser measuring instrument, the vehicle controller writes it in sequence to complete the vehicle height calibration;

[0045] S5. The vehicle controller adjusts the suspension posture to Motorway and then rises to Normal state, sends a calibration signal to the mobile laser measuring instrument, and the vehicle controller verifies the actual height information fed back by the mobile laser measuring instrument with the calibrated height. After confirming that the calibration is correct, the confirmed calibration result is sent to the laser measuring instrument screen for display.

[0046] This embodiment completes the automatic calibration of the vehicle height through signal interaction between the mobile laser measuring instrument and the vehicle controller, eliminating the need for manual measurement and calibration, thereby improving the accuracy and consistency of the calibration.

[0047] Example 2.

[0048] This embodiment is a further limitation of Embodiment 1, wherein the calibration conditions in step S1 include:

[0049] (1) The gear position information of the vehicle should be in P gear;

[0050] (2) The electronic parking brake should be in the released state;

[0051] (3) When calibrating the steering wheel angle information, the four wheels should be returned to the center, and the steering angle should be within 4° to meet the calibration conditions;

[0052] (4) The vehicle power status should be Ignition On or ignition status;

[0053] (5) The vehicle should be in an unloaded state and no node should report an error on the network.

[0054] Example 3.

[0055] This embodiment provides a vehicle height calibration method for an air suspension, based on a mobile laser measuring instrument, the method comprising the following steps:

[0056] S1, the mobile laser measuring instrument receives the vehicle height calibration request sent by the vehicle controller, starts to move along the guide rail, obtains the vehicle height data by laser ranging, and sends it to the vehicle controller;

[0057] S2. The mobile laser measuring instrument receives the calibration signal sent by the vehicle controller, measures the height data of the vehicle again and sends it to the vehicle controller. The mobile laser measuring instrument displays the calibration result of the vehicle controller on the screen after the calibration is correct.

[0058] This embodiment completes the automatic calibration of the vehicle height through signal interaction between the mobile laser measuring instrument and the vehicle controller, eliminating the need for manual measurement and calibration, thereby improving the accuracy and consistency of the calibration.

[0059] Example 4.

[0060] This embodiment is a further illustration of Embodiment 3. The mobile laser measuring instrument includes a CAN wireless transceiver module, a data acquisition module, a data processing module and a data display module. The CAN wireless transceiver module is used to receive a request signal from the vehicle controller and send data to the vehicle controller. The data processing module processes the data collected by the data acquisition module. The data display module is used to display the calibration results.

[0061] Example 5.

[0062] This embodiment is a further illustration of Embodiment 3. The height data of the vehicle in step S1 includes height data of the four wheels of the vehicle. Specifically, the heights of the four wheels are obtained by sequentially measuring the heights from the bottom edge of the wheel arches of the four wheels to the ground and subtracting them from the radii of the four wheels.

[0063] refer to Figure 1The present embodiment is described with reference to the vehicle wheel structure. First, the measuring instrument measures the height H from the lower edge of the wheel arch of the four wheels to the ground, and then the height data h of the four wheels are obtained by performing a difference calculation with the wheel radius R stored in advance.

[0064] Example 6.

[0065] This embodiment is a further illustration of Embodiment 3, and the method further includes the following preparatory steps before calibration:

[0066] (1) Park the vehicle at a designated location and determine whether the vehicle meets the calibration conditions. If the conditions are met, the vehicle enters the calibration mode. If not, the vehicle status is adjusted until the conditions are met.

[0067] (2) The vehicle controller adjusts the suspension posture to Motorway and then to Normal.

[0068] Example 7.

[0069] This embodiment is a further illustration of Embodiment 6, and the calibration conditions include:

[0070] (1) The gear position information of the vehicle should be in P gear;

[0071] (2) The electronic parking brake should be in the released state;

[0072] (3) When calibrating the steering wheel angle information, the four wheels should be returned to the center, and the steering angle should be within 4° to meet the calibration conditions;

[0073] (4) The vehicle power status should be Ignition On or ignition status;

[0074] (5) The vehicle should be in an unloaded state and no node should report an error on the network.

[0075] Example 8.

[0076] This embodiment provides a computer-readable storage medium, which is used to store a computer program, and the computer program executes the vehicle height calibration method of the air suspension as described in any one of Embodiments 1-7.

[0077] Example 9.

[0078] This embodiment provides a vehicle height calibration system for an air suspension, the system comprising a vehicle controller, the mobile laser measuring instrument described in Embodiment 4, and a guide rail.

[0079] The schematic diagram of the calibration system described in this embodiment is shown in Figure 2Guide rails and mobile laser measuring instruments are respectively arranged on both sides of the vehicle. The measuring instruments interact with the signals of the vehicle controller to complete the automatic calibration of the vehicle height. The system provided by this embodiment can greatly save labor costs and improve the accuracy and reliability of calibration.

[0080] Embodiments 1-7 respectively illustrate the calibration method based on the vehicle controller and the mobile laser measuring instrument. In order to better understand the technical solution of the present invention, the following embodiment will explain the calibration method in combination with the vehicle controller and the mobile laser measuring instrument. The flow chart of the calibration method is shown in FIG. Figure 3 As shown, the specific steps include:

[0081] S1. Preparation before calibration: Park the vehicle at the designated location, where guide rails and mobile laser measuring instruments are installed on both sides of the vehicle;

[0082] S2, calibration condition confirmation: the vehicle controller identifies whether the vehicle meets the calibration conditions. If the calibration conditions are met, the vehicle enters the calibration mode. If not, the vehicle status is adjusted to guide the vehicle to meet the calibration conditions.

[0083] S3, Suspension attitude adjustment: adjust the suspension attitude to Motorway, then to Normal;

[0084] S4, reset vehicle height: reset the original vehicle height information reserved in the vehicle controller, and send a vehicle height calibration request to the mobile laser measuring instrument through the CAN wireless transceiver module;

[0085] S5. Measure the height data of four wheels: The mobile laser measuring instrument receives the vehicle height calibration request and starts to move along the guide rail. The height from the lower edge of the wheel arch to the ground of the four wheels is measured in sequence by laser ranging, and the height is subtracted from the wheel radius to obtain the height data of the four wheels.

[0086] S6, vehicle height calibration: The laser measuring instrument sends the four-wheel height data to the vehicle controller through the CAN wireless transceiver module. After the vehicle controller receives the four-wheel wheel height data information, it writes it in sequence to complete the vehicle height calibration;

[0087] S7, calibration result confirmation: adjust the suspension posture to Motorway and then rise to Normal state, send a calibration signal to the mobile laser measuring instrument, the mobile laser measuring instrument measures the four-wheel height information again and sends it to the vehicle controller, the vehicle controller will check the received four-wheel actual height information with the calibrated height, after confirming that the calibration is correct, send the confirmed calibration result to the laser measuring instrument screen for display.

[0088] The above is an introduction to the vehicle height calibration method, system and storage medium of an air suspension proposed in the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A vehicle height calibration method for an air suspension, characterized in that: Based on the vehicle controller, the method comprises the following steps: S1. The vehicle controller identifies whether the vehicle meets the calibration conditions. If so, it enters the calibration mode. If not, it adjusts the vehicle state until the calibration conditions are met. S2, the vehicle controller adjusts the suspension posture to Motorway, and then to Normal state; S3, the vehicle controller resets the reserved original vehicle height information and sends a vehicle height calibration request to the mobile laser measuring instrument; S4, after receiving the height data information measured by the mobile laser measuring instrument, the vehicle controller writes it in sequence to complete the vehicle height calibration; S5. The vehicle controller adjusts the suspension posture to Motorway and then to Normal state, and sends a calibration signal to the mobile laser measuring instrument. The vehicle controller calibrates the actual height information fed back by the mobile laser measuring instrument with the calibrated height. After confirming that the calibration is correct, the confirmed calibration result is sent to the laser measuring instrument screen for display; The calibration conditions in step S1 include: (1) The gear position information of the vehicle should be in P gear; (2) The electronic parking brake should be in the released state; (3) When calibrating the steering wheel angle information, the four wheels should be returned to the center, and the steering angle should be within 4° to meet the calibration conditions; (4) The vehicle power status should be Ignition On or ignition status; (5) The vehicle should be in an unloaded state and no node should report an error on the network.

2. A method for calibrating the vehicle height of an air suspension, characterized in that: Based on a mobile laser measuring instrument, the method comprises the following steps: S1, the mobile laser measuring instrument receives the vehicle height calibration request sent by the vehicle controller, starts to move along the guide rail, obtains the vehicle height data by laser ranging, and sends it to the vehicle controller; S2. The mobile laser measuring instrument receives the calibration signal sent by the vehicle controller, measures the height data of the vehicle again and sends it to the vehicle controller. The mobile laser measuring instrument displays the calibration result of the vehicle controller on the screen after the calibration is correct. The method also includes the following preparatory steps before calibration: (1) Park the vehicle at a designated location and determine whether the vehicle meets the calibration conditions. If the conditions are met, the vehicle enters the calibration mode. If not, the vehicle status is adjusted until the conditions are met. (2) The vehicle controller adjusts the suspension posture to Motorway and then to Normal; The calibration conditions include: (1) The gear position information of the vehicle should be in P gear; (2) The electronic parking brake should be in the released state; (3) When calibrating the steering wheel angle information, the four wheels should be returned to the center, and the steering angle should be within 4° to meet the calibration conditions; (4) The vehicle power status should be Ignition On or ignition status; (5) The vehicle should be in an unloaded state and no node should report an error on the network.

3. The vehicle height calibration method of air suspension according to claim 2, characterized in that: The mobile laser measuring instrument includes a CAN wireless transceiver module, a data acquisition module, a data processing module and a data display module. The CAN wireless transceiver module is used to receive a request signal from a vehicle controller and send data to the vehicle controller. The data processing module processes the data collected by the data acquisition module. The data display module is used to display the calibration results.

4. The vehicle height calibration method of air suspension according to claim 2, characterized in that: The vehicle height data in step S1 includes height data of the four wheels of the vehicle, which is specifically obtained by sequentially measuring the height from the lower edge of the wheel arch of the four wheels to the ground and subtracting the height from the radius of the four wheels respectively.

5. A computer-readable storage medium, characterized in that: The computer-readable storage medium is used to store a computer program, and the computer program executes the vehicle height calibration method of the air suspension according to any one of claims 1-4.

6. A vehicle height calibration system for air suspension, characterized in that: The system comprises a vehicle controller, the mobile laser measuring instrument as claimed in claim 3 and a guide rail.

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