G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 21/85 (2006.01) G01N 21/88 (2006.01) G01N 33/02 (2006.01)
Patent
CA 2306060
A quality evaluation method for granular objects includes the steps of: irradiating the objects from a front side and a back side thereof; taking a reflection light image and a transmission light image from both the front and back sides of the irradiated objects: obtaining optical information of the objects by image-processing the reflection and transmission light images; obtaining shape information of the objects based on the optical information; determining the quality of each of the objects based on the optical information and the shape information; and counting the numbers of the objects per quality and obtaining ratios of the objects per quality against the total number of the objects. Samples images of the objects per quality are prepared. The numbers and ratios of the objects per quality and the sample images are displayed or printed out. One side of the granular objects may be irradiated by separate light sources that are turned on/off simultaneously or independently with each other. The separate light sources, in combination, form a circular or ring-like light source. By so doing, the detection of crack in the object is highly enhanced.
Doi Takahiro
Ikeda Manabu
Satake Satoru
Takashita Satoru
G. Ronald Bell & Associates
Satake Corporation
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