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Method and apparatus for 360° panorama inspection

IP.com Disclosure Number: IPCOM000028834D
Original Publication Date: 2004-Jun-04
Included in the Prior Art Database: 2004-Jun-04
Document File: 2 page(s) / 280K

Publishing Venue

IBM

Abstract

360° inspection and measurement of the geometry of the inner surface of gasket rings

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Method and apparatus for

360°360°

panorama inspectionpanorama inspection

Problem

Inspection of the inner surface of gasket rings that consist of a metal hull and a rubber ring that is embedded in this hull (Fig. 1). Defects have to be detected and the gap between the ring and the metal hull has to be measured .

Solution

    The inner surface (4) of the gasket (2) is inspected as follows: A cone-shaped mirror (12) is inserted from beneath into the gasket ring. A camera (6) is viewing the cone-shaped mirror (12) from above. Light (8) is coupled coaxially into the camera direction by a mirror (10) (Fig. 2). The cone-angle is 90°. By viewing from above and reflection at the cone surface it is possible to view the total inner surface (360°) of the gasket ring.

Fig. 1: Inspection setup

The panorama picture is shown in Fig. 2.

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Fig. 2: Inspection setup and panorama picture

    Measuring the geometry of the inner surface (gap) is performed by image processing algorithms with e.g. 4 measurement positions. The number of measuring positions can be increased as necessary. Additionally the concentricity of the fitted circles is calculated, which is a measure for the gaps between the rubber ring and the metal hull.

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