Honeycomb filter defect detecting method and apparatus
AssigneeCorning Incorporated
InventorsPatrick Michael Gargano, Babak Robert Raj, William Paul Ryszytiwskyj, John Charles Speeckaert, David John Worthey
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Abstract
A apparatus and method for detecting defects in a honeycomb body. In operation, the particulates emerge at an outlet end face of the honeycomb body through defects, if any, in the honeycomb walls and/or plugs and passes though a permeable member, such as a screen, where they are illuminated. The permeable member is disposed adjacent to and preferably in contact with the outlet end. Use of the permeable member improves the signal-to-noise ratio (SNR) such that defects may be more readily detected. The permeable member preferably includes an anti-reflective surface.
Claims7
A method of detecting a defect in a honeycomb body, comprising the steps of:
- providing a gas flow stream containing particulates to an inlet end face of the honeycomb body;
- flowing portions of the gas flow stream exiting an outlet end face of the honeycomb body through a permeable member, wherein the permeable member includes an anti-reflective surface having a dark coloring, in order to improve the signal-to-noise ratio and also straighten the flow exiting from the end face, such that improved defect detection is enabled, and
- illuminating any of the particulates exiting the permeable member with a light source.
Dependencies are inferred from the claim text.