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Visual full-parameter wheel alignment detection system and method based on linear array images

A line array image, wheel positioning technology, applied in the direction of wheel testing, measuring devices, instruments, etc.

Inactive Publication Date: 2010-11-24
TSINGHUA UNIV
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Problems solved by technology

However, this detection method for wheelbase, wheelbase, frame angle and friction radius is only applicable to target-based 3D wheel alignment detection equipment. The target image is solved to calculate the space geometric parameters such as the kingpin, the center line of the wheel, and the radius of rotation of the wheel, and finally the above wheel positioning parameters are calculated according to the definition

Method used

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  • Visual full-parameter wheel alignment detection system and method based on linear array images
  • Visual full-parameter wheel alignment detection system and method based on linear array images
  • Visual full-parameter wheel alignment detection system and method based on linear array images

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Embodiment Construction

[0037] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] The visual type full-parameter wheel alignment detection system based on linear array images of the present invention, such as figure 1 As shown, four measuring arms 1-4 and one computer 5 are included. Each measuring arm includes two line array cameras (Qi and Gi, i=1~4) and processing circuits, communication circuits, inclination sensors, power circuits and other components. In this embodiment, the inclination sensor is a MEMS sensor whose model is SCL1700-D11. The internal structure of each line scan camera is the same, such as image 3 As shown, it includes a cylindrical mirror 9 whose axis is in the vertical direction, a filter or an attenuation sheet 8 placed vertically in front of the cylindrical mirror, a line array image sensor 10 placed horizontally at the focal length f behind the cylindrical mirror and its Drive circuit, ...

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Abstract

The invention relates to a visual full-parameter wheel alignment detection system and method based on linear array images, and belongs to the technical field of automobile detection and diagnosis. The system comprises four measuring arms and a computer, wherein each measuring arm comprises two linear array cameras, an inclination sensor and other circuit components, one camera is installed on the end part of the measuring arm, and the other camera is installed below the installation shaft of the measuring arm; and both sides of the cylindrical lens of the camera are provided with two light-emitting diodes. The method comprises the following steps: when in detection, clamping the measuring arms onto the corresponding wheels, and acquiring images the cameras in opposite when the light-emitting diodes in the cameras work in a flickering mode; calculating the azimuth angle and distance between the two cameras according to the pixel coordinates and installation intervals of light spot images of the light-emitting diodes; and according to the dimensions, inclination and the like of the measuring arm, calculating all wheel alignment parameters by utilizing the principles of geometry and vector algebra. The invention can simultaneously detect the angle parameters and distance parameters of wheel alignment and realize full parameter detection of wheel alignment.

Description

technical field [0001] The invention belongs to the technical field of automobile detection and diagnosis, in particular to a visual full-parameter wheel alignment detection system and method based on linear array images. Background technique [0002] Since the accuracy of the vehicle wheel alignment directly affects the safety, economy and comfort of the vehicle, and the accuracy of the wheel alignment directly depends on the accuracy of the detection of the wheel alignment parameters, the detection of the wheel alignment parameters is very important in the field of automobile detection and diagnosis. appears to be particularly important. [0003] Wheel alignment includes the relative angle and position positioning between the wheels, so the wheel positioning parameters also include angle positioning parameters and distance positioning parameters. The angle positioning parameters include wheel camber (Camber), toe angle (Toe), kingpin inclination (KPI or SAI) and caster (C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/00G01M17/013
Inventor 丁天怀熊刚李金林
Owner TSINGHUA UNIV
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