Abstract: When a granular object is determined to have to be sorted out two or more times in two or more of sort-out necessity/unnecessity determination results determined by a determination portion, a sort-out signal setting portion of an optical sorting apparatus sets a sort-out actuation signal that contains information for actuating an ejector when the granular object advancing in the air passes through a sorting region based on a combination of the sort-out necessity/unnecessity determination results from a predetermined signal setting table.

Abstract: To provide an optical grain sorter that can reduce the proportion of non-defective grains blown off collaterally, and even in a case in which a plurality of defective grains or the like fall down in a state overlapping each other, can blow off all the defective grains or the like.

Abstract: The present invention includes a conveyance step of conveying an object to be sorted, an image information acquisition step of, at least either during the conveyance step or after the conveyance step, acquiring image information on the object to be sorted, and dividing the image information into a plurality of pieces of cell data, and an identification step of identifying the object to be sorted based on the cell data and a learning model trained by inputting learning information concerning the object to be sorted, in which the learning information at least includes good part information, defective part information, and background information concerning the object to be sorted, and the good part information at least includes contour information on the object to be sorted.

Abstract: An optical sorter includes a light source configured to irradiate a sorting target in transit on a conveyance route with light, an optical sensor configured to detect light emitted from the light source and associated with the sorting target, a determination portion configured to determine whether the sorting target is a foreign object and/or a defective product based on a signal acquired by the optical sensor with respect to the light associated with the sorting target, and at least one intermediate member disposed at a position located between the light source and the conveyance route in a direction in which the sorting target is irradiated with the light from the light source and located in such a manner that the intermediate member does not affect the detection of the light associated with the sorting target. The at least one intermediate member includes a reflection region on which the light emitted from the light source is reflected.

Abstract: An inspection unit for performing an optical inspection on a grain to be transferred by transfer means includes a visible light source, a near-infrared light source, a visible light detection unit, and a near-infrared light detection unit. A determination unit plots wavelength components of red (R), green (G), and blue (B), and a near-infrared light component in a three-dimensional space, to create a three-dimensional optical correlation diagram, for a plurality of good product samples and defective product samples, and sets a threshold value, in which: the wavelength components are detected by the visible light detection unit; and the near-infrared light component is detected by the near-infrared light detection unit.

Abstract: An optical sorter includes a first light source disposed on a first side, a second light source disposed on a second side, an optical sensor configured to detect light during a plurality of scan periods including a first scan period and a second scan period, a determination part configured to determine a foreign object and/or a defective product, and a light source control part.

Abstract: To provide an optical grain sorter that can reduce the proportion of non-defective grains blown off collaterally, and even in a case in which a plurality of defective grains or the like fall down in a state overlapping each other, can blow off all the defective grains or the like.