| Summary: | 碩士 === 大同大學 === 機械工程學系(所) === 98 === The purpose of this thesis is to develop new modes use other than vibration screen, and its main function is testing for a small amount of rice. It also has the same function and performance with existing vibrating screen machine. Finally in order to combine automated inspection machine, developed a special rice elevator, aimed at connecting the test procedure and selection process in this thesis.
In order to reach the function the new screen machine should be have, this thesis will try to experiment and discuss three aspects, namely, photoelectric, wind-type and roller type. Photoelectric: when CDS is covered, its resistance will be change, to make the voltage amplitude and pulse width change, and so as a basis for CDS classification; wind-type: using the same wind blowing over the rice which one is fall down, and rice falling distance with the force will vary depending on size and weight; roller type: the production of a specific mesh into a cylinder shape, use scroll all the way to reach to the classification of rice.
This thesis is successfully found out new method to select the rice and it has the same function and performance of the vibration screen. Finally develop a special rice elevator.
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