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Method and system for measuring toe-in angle of wheel based on image

A wheel toe-in and image technology, applied in image enhancement, image analysis, wheel testing, etc., can solve problems such as tire wear increase, and achieve the effect of convenient implementation, reduced computational complexity, and simple calculation.

Active Publication Date: 2020-06-02
的卢技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the camber of the front wheels, the left and right wheels often act on the opposite direction of rolling thrust corresponding to the camber angle, which increases tire wear

Method used

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  • Method and system for measuring toe-in angle of wheel based on image
  • Method and system for measuring toe-in angle of wheel based on image
  • Method and system for measuring toe-in angle of wheel based on image

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The vehicle must have its wheel alignment adjusted within the proper range to drive and operate safely and stably. Generally, the terms toe and camber are used to indicate wheel alignment. The toe angle indicates the angle of inclination of the wheels relative to the direction of travel of the vehicle when viewed directly from above. If the wheels are tilted inward, this angle is called the toe angle; if the wheels are tilted outward, this angle is called the rear toe angle . The camber angle indicates the inclination of the wheel at the contact point relative to the vertical facing outward or inward when viewed from the front or rear. If the wheel is inward, it is called negative camber; if the wheel is outward, it is called positive Camber. In the process of automobile development, especially chassis adjustment, it is necessary to frequently replace the components of the suspension and steering system in order to select a set of configurations with the best performa...

Embodiment 2

[0088] refer to Figure 4 , which is a system for measuring the toe angle of a wheel based on an image proposed in this embodiment, and the method for measuring the toe angle of a wheel is realized by relying on this system. Specifically, the system includes a laser line emitting device 100, a photographing module 200, and an image processing module 300; wherein the laser line emitting device 100 is used for projecting the laser line on the side of the calibration pattern placed on the ground; the photographing module 200 is used for photographing the laser line and marking pattern; the image processing module 300 is used to calculate the three-dimensional positional relationship between the laser lines to obtain the toe angle of each tire of the vehicle to be detected.

[0089] It should also be noted that the laser line emitting device 100 is a laser emitter, which is a device capable of emitting laser light. For example, in this embodiment, a laser emitter with a signal of ...

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Abstract

The invention discloses a method and system for measuring a toe-in angle of a wheel based on an image, and the method comprises the following steps of clamping a laser ray transmitting device on the side surface of the wheel of a to-be-detected vehicle; projecting the laser rays of the laser ray emitting device towards the ground, and placing a calibration pattern at the side of a projection area;projecting the laser rays to the side of a calibration pattern placed on the ground; using a shooting module to shoot the laser rays and the calibration pattern; and using an image processing moduleto calculate the three-dimensional position relationship among the laser rays to obtain the toe-in angle of each tire of the vehicle to be detected. The beneficial effects of the invention are that byadopting a laser line calibration scheme, the calculation complexity is reduced, the detection precision is improved, the calculation is simple, the implementation is convenient, and the precision ishigh.

Description

technical field [0001] The invention relates to the technical field of vehicle angle calculation, in particular to a method for measuring the toe angle of a wheel based on an image and a system for measuring the toe angle of a wheel based on an image. Background technique [0002] In order to ensure the stable straight running of the car, the steering wheel should have an automatic return function, that is, when the steering wheel is accidentally deflected by an external force (such as hitting a stone), it can automatically return to the straight line immediately after the external force disappears. s position. This back-to-centering effect is guaranteed to be realized by the positioning parameters of the steering wheel. Due to the camber of the front wheels, the left and right wheels often act on the opposite direction of the roll thrust corresponding to the camber angle, which increases the tire wear. In order to avoid this situation, it is necessary to find a way to eli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/013G01C11/02G01C11/04G01C11/00G06T5/00G06T7/80
CPCG01M17/013G01C11/02G01C11/00G01C11/04G06T7/80G06T2207/30208G06T5/80
Inventor 王珏
Owner 的卢技术有限公司
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