Generated particle inspection device and inspection method thereof for pillar-shaped honeycomb filter

An inspecting method for a pillar shaped honeycomb filter, wherein the method comprises:

• a particle generation step of generating particles with a particle generation portion;
• a particle introduction step of introducing, with a particle introduction portion, the particles generated in the particle generation step into a gas stirred by a gas stirring portion;
• a particle concentration adjusting step of adjusting a concentration of particles in the gas, with a particle concentration adjusting portion;
• a particle feed step of feeding the gas having the adjusted concentration of the particles to the pillar shaped honeycomb filter;
• and
• a particle measurement step of measuring, with an upstream side particle counter and a downstream side particle counter, the number of particles in the gas on an upstream side and a downstream side of the pillar shaped honeycomb filter in a flow direction of the gas,
• wherein, in the particle introduction step, the particles generated in the particle generation step are introduced into the gas in a direction opposing the flow direction of the gas.