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Calibration method of wheel radius and calibration device of wheel radius

A radius and wheel technology, which is applied in the field of calibration methods and wheel radius calibration devices, can solve the problems of large straight-line driving distance error, harsh calibration scene requirements, and large errors, and achieve accurate vehicle speed, low calibration scene requirements, and low error. small effect

Inactive Publication Date: 2019-04-02
GUANGZHOU XIAOPENG MOTORS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In practice, it is found that the signal of GPS is unstable during the long-distance driving of the vehicle, and because the vehicle is not traveling in an absolute straight line, the error of the straight-line driving distance obtained by GPS is relatively large; in addition, in the actual vehicle trajectory It is difficult to find a straight line segment for a long distance
It can be seen that the current wheel radius calibration method has a large error and the calibration scene is demanding

Method used

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  • Calibration method of wheel radius and calibration device of wheel radius
  • Calibration method of wheel radius and calibration device of wheel radius
  • Calibration method of wheel radius and calibration device of wheel radius

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Embodiment 1

[0060] See figure 1 , figure 1 It is a schematic flow chart of a method for calibrating wheel radius disclosed in an embodiment of the present invention. Such as figure 1 As shown, the method for calibrating the wheel radius may include the following steps:

[0061] 101. The wheel radius calibration device obtains the traveling speed of the vehicle in the target time period measured by the vehicle-mounted satellite positioning system.

[0062] In the embodiment of the present invention, the vehicle-mounted satellite positioning system may be a satellite positioning and navigation system such as Global Positioning System (GPS), Beidou satellite navigation system or GLONASS (GLOBAL Navigation Satellite System, GLONASS). The embodiment of the present invention Not limited. Among them, the wheel radius calibration device can measure the traveling speed of the vehicle through the above-mentioned satellite positioning and navigation system, and the accuracy of the measured traveling spe...

Embodiment 2

[0083] See figure 2 , figure 2 It is a schematic flowchart of another wheel radius calibration method disclosed in the embodiment of the present invention. Such as figure 2 As shown, the method for calibrating the wheel radius may include the following steps:

[0084] 201. The wheel radius calibration device obtains the maximum travel speed and the minimum travel speed of the vehicle in the target time period measured by the vehicle-mounted satellite positioning system.

[0085] In the embodiment of the present invention, the wheel radius calibration device can measure at least one driving speed of the vehicle in the target time period through the satellite-borne positioning system, and filter the at least one driving speed to determine the maximum value of the vehicle in the target time period. Travel speed and minimum travel speed.

[0086] 202. The wheel radius calibration device calculates the average value of the maximum traveling speed and the minimum traveling speed in the...

Embodiment 3

[0094] See image 3 , image 3 It is a schematic structural diagram of a wheel radius calibration device disclosed in an embodiment of the present invention. Such as image 3 As shown, the wheel radius calibration device may include:

[0095] The first acquiring unit 301 is configured to acquire the vehicle's traveling speed in the target time period measured by the on-board satellite positioning system; wherein the signal quality of the on-board satellite positioning system is higher than the preset signal quality threshold in the target time period, and The duration of the target time period is less than or equal to the preset duration threshold;

[0096] The second acquiring unit 302 is configured to acquire the wheel pulse count of the vehicle in the target time period;

[0097] The first determining unit 303 is configured to determine the wheel radius calibration value of the vehicle corresponding to the target time period according to the wheel pulse count, the duration of the...

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Abstract

The embodiment of the invention relates to the technical field of automobiles, and discloses a calibration method of a wheel radius and a calibration device of the wheel radius. The method comprises the following steps: obtaining a driving speed of a vehicle measured by a vehicle-mounted satellite positioning system within a target time period, wherein the signal quality of the vehicle-mounted satellite positioning system is higher than a preset signal quality threshold within the target time period, and the time length of the target time period is less than or equal to a preset time length threshold; obtaining a wheel pulse count of the vehicle within the target time period; determining a wheel radius calibration value of the wheel corresponding to the target time period according to thewheel pulse count, the time length of the target time period, the driving speed and a preset conversion coefficient; and determining a target wheel radius of the vehicle according to the wheel radiuscalibration values corresponding to the multiple target time periods. By implementation of the above method, the wheel radius of the vehicle can be accurately calibrated.

Description

Technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for calibrating wheel radius and a device for calibrating wheel radius. Background technique [0002] At present, a common method of wheel radius calibration is to calibrate the vehicle trajectory based on the Global Positioning System (GPS), intercept a long-distance straight line segment in the vehicle trajectory, and obtain the straight-line travel distance corresponding to the straight line segment. Combined with the wheel pulse count of the vehicle, the wheel radius of the vehicle is calculated. [0003] In practice, it is found that the GPS signal is unstable during the long-distance driving of the vehicle, and because the vehicle is not traveling in an absolute straight line, the error in the straight-line travel distance obtained by GPS is large; in addition, the actual vehicle trajectory It is difficult to find a long straight line. It can be seen that the curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/12
CPCG01B7/12
Inventor 李红军刘中元黄亚
Owner GUANGZHOU XIAOPENG MOTORS TECH CO LTD