Apparatus for detecting cracked rice grain

Details Apparatus for detecting cracked rice grain Apparatus for detecting cracked rice grain

1982-03-09

1986-02-25

McGraw, Vincent P.

Optics: measuring and testing

Inspection of flaws or impurities

Transparent or translucent material

209588, 250223R, G01N 2185, G01N 2189

Patent

active

045726663

ABSTRACT:
An apparatus for detecting cracked rice grains. The apparatus has conveyor means by which the rice grains to be examined are moved in at least one row extending in the direction of movement, a light-transmitting window formed in the conveyor means and adapted to pass a coherent light beam of a width smaller than the diameter of the rice grain, a light source means adapted to apply the coherent light, light-receiving means including light-receiving elements adapted to detect the quantities of lights transmitted through the leading half part and trailing half part of the rice grain when the latter passes over the light-transmitting window, and a circuit means adapted to measure and compare the quantities of light received by the light-receiving means in comparison with predetermined reference threshold values.

REFERENCES:
patent: 3197647 (1965-07-01), Fraenkel
patent: 3356853 (1967-12-01), Rottmann
patent: 3812348 (1974-05-01), Lippke
patent: 3871774 (1975-03-01), Murata
patent: 4279346 (1981-07-01), McClure et al.

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