| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that a limit of measurement precision is involved even when a laser light source and a camera being expensive and precise are used therefor. SOLUTION: An area covering a flange from the reference groove side edge of a wheel and an area covering the flange from the tread side edge of the wheel are irradiated with laser light in two directions separately, whereby a cross-sectional contour shape is displayed on the surface of the wheel, and the cross-sectional contour shape is photographed by separate cameras in directions identical to above laser light irradiation directions, and respective photographed images are subjected to a three-dimensional processing, and both processed images are made composite, and the composite image is superimposed on a reference image acquired by applying the image composition using above method to a wheel having known dimensions, and a dimension of a measurement point is measured from a difference between both images. A wheel measuring apparatus is provided with: a laser light source; the cameras; and a CPU for performing various arithmetic operations such as the three-dimensional processing of the images photographed by the cameras, the composition of the three-dimensional processed images, the superimposition of the composite image and the reference image, the dimensional measurement of the measurement point of the wheel based on the difference between the superimposed images, an arithmetic operation of a kilometrage based on an amount of wear and the like. A vehicle sensor for sensing the presence of a vehicle and a timing sensor for timing the photographing of the cameras, the arithmetic operations and the like, are also disposed therein. COPYRIGHT: (C)2008,JPO&INPIT
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