Apparatus for inspecting honeycomb structures

摘要

An apparatus for inspecting defects in a honeycomb structure, such as used in a diesel particulate filter, comprises a current plate (41) and means for introducing fine grains into cells (56) of the honeycomb structure defined by partition walls (58) at a fine grain introduction face (53), wherein fine grains penetrating the partition walls (58) are discharged from a fine grain discharge face (54). The discharged particles scatter light (51) emitted by a light source (30), said scattered light being detected by a CCD camera.