Optical inspection of lacquer and carbon deposits

Details Optical inspection of lacquer and carbon deposits Optical inspection of lacquer and carbon deposits

1991-05-07

1992-06-02

McGraw, Vincent P.

Optics: measuring and testing

By inspection with agitation or rotation

356376, 356446, G01N 2184, G01B 1124

Patent

active

051181940

ABSTRACT:
An improved method and apparatus for classifying and quantifying lacquer and carbon deposits on internal combustion engine pistons. In the preferred embodiment of the invention, a piston is mounted on a rotating means and is rotated to expose the entire surface of the piston to a video imaging system. The piston is illuminated with indirect lighting in order to minimize reflections and to enhance the contrast of the video image. The video imaging system is comprised of a video camera which employs a charged coupled device (CCD) sensor and data storage for storing digital video produced by the camera. A microprocessor is operable to control operation of the camera and to process the stored data according to an algorithm to classify the video image into one of six categories.

REFERENCES:
patent: 4376951 (1983-03-01), Miyazawa
patent: 4555635 (1985-11-01), Yoshida
patent: 4559684 (1985-12-01), Pryor
Luck et al., "New Methods for the Evaluation and Recording of Piston-Skirt Deposits," Society of Automotive Engineers Journal (Transactions) vol. 51 #Feb. 2 1943, pp. 38-44 & 63.

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