Patent ID: 11971363
Assignee: NIPRO CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A foreign matter inspection system inspecting whether a foreign matter is present inside a bag-like container in which a powder is sealed and which has an area where the powder is visible from an outside, the foreign matter inspection system comprising:
a vibration device configured to alternately apply a weak vibration and a strong vibration to the container, the strong vibration being a vibration stronger than the weak vibration; and
a photography device configured to optically photograph an inside of the container through the area from the outside when the vibration device applies the weak vibration to generate images of the container;
wherein an image of the container, photographed by the photography device when the vibration device applies the weak vibration, is used to determine whether foreign matter is present inside the container;
wherein each image of the area photographed comprises a plurality of image sub-areas of image data, the image data indicative of color density; and
wherein foreign matter is present when all of a peak color density value, an intensity volume value, and an intensity area value, derived from the image data for a continuous range of sub-areas, are at least as great as a respective threshold.