Patent ID: 7227148
Filing Date: 2007-06-05
Classification: A24B,B07C,G01N

Abstract:
1. A detecting apparatus for detecting a plurality of kinds of impurities in a material consisting of harvest plants in bulk, said detecting apparatus comprising: an illuminating device for applying infrared rays to the material when the material is transported; a receiving device for receiving said infrared rays reflected by the material and outputting reflection intensity of a first wavelength component of said reflection infrared rays, the first wavelength component being selected from a first wavelength region of 1,800 nm and over and less than 2,500 nm; and a decision device for comparing the reflection intensity of said first wavelength component with a first reference value and detecting said impurities in the material on the basis of the result of the comparison, the first reference value being set on the basis of reference reflection intensity of the first wavelength component reflected by the harvest plants, whereby the decision device distinguishes between the impurities and the material itself.