Hough transform approach to gap measurement in blade inspection

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United States of America Patent

PATENT NO 9137462
APP PUB NO 20130088587A1
SERIAL NO

13617416

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Abstract

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Two adjacent objects with a gap between the objects rotate in a hot atmosphere with a temperature greater than 300 F in a gas turbine. Automatic and accurate contactless measurement of the gap is performed by taking images of the gap. An image, preferably an infra-red image is taken from the gap, a processor extracts the two edges from the image of the gap. The processor also determines a line through the pixels of an edge by applying a Hough transform on the pixels. The edges are substantially parallel. A line substantially perpendicular to the lines is also determined. Using the substantially parallel lines and the line substantially perpendicular to the substantially parallel lines the processor determines a width of the gap.

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Patent Owner(s)

  • SIEMENS CORPORATION;SIEMENS ENERGY, INC.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Baleine, Erwan Orlando, US 15 142
Genc, Yakup Dayton, US 40 2360
Lemieux, Dennis H Casselberry, US 16 365
Li, Gang Princeton, US 561 3635

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