Optoelectronic method and appliance for measuring the inside diameter of a hollow body
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United States of America Patent
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Jan 26, 2016
Grant Date -
Nov 27, 2014
app pub date -
Aug 8, 2012
filing date -
Aug 8, 2011
priority date (Note) -
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Abstract
The invention relates to a method of measuring the inside diameter of a hollow body. According to the invention: the hollow body is illuminated from one side by a diffuse light source presenting two light boundaries that are spaced apart along the measurement axis so as to create two light transitions in an image, which transitions are spaced apart from each other and diametrically opposite; from the side of the hollow body that is opposite from its illuminated side, the light rays that are reflected and refracted by the hollow body are recovered to form at least one image in which there appear at least the two light transitions; and the image is processed in order to determine the distance between the two light transitions in order to determine a measurement for the inside diameter of the hollow body.
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