摘要
本論文嚐試開發振動方式以外的新型篩米機構，主要功能是希望與現有的振動篩米機具有相同的功用與效能。以光電式、風力式與滾筒式三種方式開發新型篩米機構。光電式：讓米粒流過設有CDS的流道，利用CDS上的光照量被遮斷時的電阻改變，再以分壓電路測得輸出電壓的振幅和寬度變化，以此作為分級的依據；風力式：利用一股穩定的微弱氣流吹向落下米粒的側面，米粒受力的大小因其自身而異，因此落下的遠近將因米粒大小而有所不同；滾筒式：將特定網目的篩網製作成圓筒狀，利用滾動的方式達到白米分級。 本研究嚐試了三種新式篩米機構，並以實驗數據分析其篩米效果的優劣，但因新式篩米機構成果不如預期，故探討其優劣與原因。
關鍵字
白米篩選並列摘要
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.