Inspection device and inspection method for pillar-shaped honeycomb filter

An inspection device for a pillar shaped honeycomb filter, wherein the inspection device comprises:

• a housing portion that can house a pillar shaped honeycomb filter;
• an introduction pipe and a discharge pipe through which a gas can flow, each of the introduction pipe and the discharge pipe being connected to the housing portion;
• a particle generation portion for generating particles;
• a particle introduction portion for introducing the particles generated by the particle generation portion into the introduction pipe;
• a gas stirring portion arranged in the introduction pipe on an upstream side of the particle introduction portion in a gas flow direction;
• and
• particle counters for measuring the number of particles, the particle counters being arranged in the introduction pipe and the discharge pipe on a downstream side of the particle introduction portion in the gas flow direction,
• wherein the gas stirring portion is a gas stirring plate having a pair of planes perpendicular to the gas flow direction and having a plurality of openings penetrating the pair of planes, and the plurality of openings are provided in a region on an outer peripheral side of the gas stirring plate.