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Method and system for determining three-dimensional coordinates of target disc of 3D four-wheel aligner

A technology of four-wheel aligner and three-dimensional coordinates, which is applied in the direction of instruments, wheel testing, image analysis, etc., and can solve problems such as relying on the experience of engineers, low precision, and difficult operation

Active Publication Date: 2021-07-02
上海鼎盛汽车检测设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a determination method is difficult to operate, especially depends on the experience of engineers, and the accuracy is not high.

Method used

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  • Method and system for determining three-dimensional coordinates of target disc of 3D four-wheel aligner
  • Method and system for determining three-dimensional coordinates of target disc of 3D four-wheel aligner
  • Method and system for determining three-dimensional coordinates of target disc of 3D four-wheel aligner

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Embodiment Construction

[0037] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0038] see figure 1 Shown is a flow chart of the steps of the method for determining the three-dimensional coordinates of the target disc of the 3D four-wheel aligner of the present invention.

[0039] In one embodiment, the method for determining the three-dimensional coordinates of the target disc of the 3D four-wheel aligner includes the following steps:

[0040] (1) Convert the pixel coordinates of each dot of the target disk in the target disk image into actual coordinates;

[0041] (2) Utilize the actual coordinates of the dots described in the section to determine the approximate position of the target disk in the actual coordinates;

[0042] (3) Calculate the actual three-dimensional coordinates of the target disk by using the approximate position.

[0043] In a preferred manner, the step (1) specifically includes the following ste...

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Abstract

The invention relates to a method and system for determining three-dimensional coordinates of a target disc of a 3D four-wheel aligner, belonging to the technical field of automobiles. This method first converts the pixel coordinates of each dot on the target disk in the target disk image into actual coordinates; then uses the ideal target disk model to gradually approach the actual target disk position, and calculates and determines the actual coordinates of some dots on the actual target disk through iterative calculation. Then determine the approximate position of the target disk in the actual coordinates; then use the approximate position to narrow the calculation range, and calculate the actual coordinates of all the dots on the actual target disk through the same iterative method, thereby determining the three-dimensional coordinates of the target disk , the method for determining the three-dimensional coordinates of the target disc of the 3D four-wheel aligner of the present invention is simple and fast in application, the technical threshold is lower, the realization cost is low, and the determination of the three-dimensional coordinates of the target disc of the 3D four-wheel aligner of the present invention is high in calibration accuracy The system has a simple structure and a wide range of applications.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to the technical field of four-wheel alignment, in particular to a method and system for determining the three-dimensional coordinates of a target disc of a 3D four-wheel aligner. Background technique [0002] 3D four-wheel aligner is a common instrument and equipment for four-wheel alignment of automobiles. The target disc is an important part of the 3D four-wheel aligner. When using a 3D four-wheel aligner, it is necessary to use the target disc to determine whether the attitude of the tire is correct, which requires determining the three-dimensional coordinates of the target disc before using the 3D four-wheel aligner. The world coordinate system used for the three-dimensional coordinates of the target disk refers to the optical center after the camera is calibrated as the origin (0, 0, 0) of the coordinate system. The coordinate system of the target disk means that the lin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/275G01M17/013G06T7/70G06T7/80
CPCG01B11/2755G01M17/013G06T2207/10004G06T7/70G06T7/80
Inventor 韩志可戎洲杰
Owner 上海鼎盛汽车检测设备有限公司