HONEYCOMB FILTER DEFECT DETECTING METHOD AND APPARTUS

• Main Authors: GARGANO, PATRICK M, RYSZYTIWSKYJ, WILLIAM P, RAJ, BABAK R, SPEECKAERT, JOHN C, WORTHEY, DAVID J
• Format: Patent
• Language: English; French
• Published: 08.11.2007
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; SEPARATION; STEAM ENGINES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING; TRANSPORTING; WEAPONS

An apparatus and method for detecting defects in a honeycomb body. In operation, the particulate 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. Appareil et procédé de détection de défauts dans un corps alvéolaire. En pratique, la matière particulaire émerge d'une face d'extrémité de sortie du corps alvéolaire par des défauts éventuels dans les parois alvéolaires et/ou des bouchons et traverse un élément perméable, tel qu'un crible, où elle est illuminée. L'élément perméable est disposé en position adjacente à la face d'extrémité de sortie, de préférence au contact de celle-ci. L'utilisation de l'élément perméable permet d'améliorer le rapport signal/bruit (SNR) et de faciliter ainsi la détection de défauts. L'élément perméable présente de préférence une surface antireflet.