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A Method for Automatically Measuring Wheel Hub Height

An automatic measurement and wheel hub technology, which is applied in the field of computer vision, can solve the problems of uneven wheel height and difficult to distinguish wheel hubs, etc., and achieves the effect of small environmental light influence, fast calculation speed and wide application scenarios.

Inactive Publication Date: 2018-04-13
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, the height of the hub is uneven, and it is difficult to distinguish different types of hubs through a fixed threshold

Method used

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  • A Method for Automatically Measuring Wheel Hub Height
  • A Method for Automatically Measuring Wheel Hub Height

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Experimental program
Comparison scheme
Effect test

Embodiment

[0038] Such as figure 1 As shown, the system for automatically measuring the hub height of this embodiment includes a PC 1 , a camera assembly 2 and a conveyor chain set 3 . The transmission chain group 3 includes two transmission chains, respectively connected to two transmission motors with identical performance. The motors in the camera assembly 2 and the transmission chain group 3 are electrically connected to the PC 1 respectively, and the hub 4 is clamped by the transmission chain group 3. When the two motors in the transmission chain group 3 rotate in reverse, the hub 4 is moved The chain group 3 is clamped for rotary motion, and when the motor rotates in the same direction, the hub 4 is clamped by the moving chain group 3 for linear motion. The camera assembly 2 comprises a CCD camera positioned in the middle, an infrared emitter positioned at the left side of the CCD camera and an infrared camera positioned at the right side of the CCD camera, and the camera assembly...

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Abstract

The invention discloses an automatic wheel hub height measuring method. A CCD camera and an infrared camera respectively acquire an image; the circle center position, radius and maximum outline circle of a wheel hub are extracted from the colorful image acquired by the CCD camera through Hough transformation; the minimum non-zero depth value D1 within the outline circle is retrieved and extracted from the depth image; a wheel hub bottom depth value D2 is acquired from the maximum outline circle of the depth image; a wheel hub height value H = D2-D1 is calculated. The invention further discloses an automatic wheel hub height measuring system. The automatic wheel hub height measuring method is high in automatic detection degree and accuracy degree.

Description

technical field [0001] The invention relates to computer vision technology, in particular to a method for automatically measuring the height of a wheel hub. Background technique [0002] Wheel hubs need to be designed in different shapes, diameters and heights according to the requirements of various automobile manufacturers. In the production process, each wheel hub needs to undergo X-ray flaw detection after being cast and formed, and then sent to different machining centers for shape processing. In order to choose the correct flaw detection and machining program, it is necessary to measure the hub height accurately. [0003] At present, the detection of wheel height usually adopts adding a fixed-height grating sensor, but this only serves as a height threshold judgment function, that is, it gives a judgment result greater or less than the height. In fact, the height of the hub is uneven, and it is difficult to distinguish different types of hubs through a fixed threshol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/06
CPCG01B11/0608
Inventor 黄茜许浩均
Owner SOUTH CHINA UNIV OF TECH