| 摘要 |
PURPOSE:To reduce the labor of decision making by providing a control part which compares the reference distribution of detected values of a sample with the distribution of detected values of a measured sample, and decides the skin rasping state of the measured sample. CONSTITUTION:Unpolished rice S which are supplied to the sample hole 12 of a disk 4 and carried, grain by grain, as shown by an arrow (a) is irradiated with light from source 20. The projected light passes through the unpolished rice S to reach a transmitted light quantity sensor 22 when the unpolished rice 8 has no skin rasping but is reflected to reach a reflected light quantity sensor 24 when the unpolished rice S has skin rasping. At this time, the control part 10 decides the quality of each grain of the unpolished rice S by using the value of the quantity of transmitted light of the sensor 22 and the value of the quantity of reflected light from the sensor 24, detects the distribution of transmissivity when the measuring operation is completed, and compares the reference distribution of detected values of the unpolished rice S with the distribution of detected values of measured graded grains to decide the skin rasping state of the graded grains. Consequently, the accuracy of the quality decision making is improved and the labor at the time of the decision making is reduced.
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