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題 名 | 蕃茄顏色之光電選別室設計 |
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作 者 | 謝廣文; 陳世銘; | 書刊名 | 農業工程學報 |
卷 期 | 34:4 1988.12[民77.12] |
頁 次 | 頁39-46 |
分類號 | 434.251 |
關鍵詞 | 光電; 設計; 蕃茄; 選別; 顏色; |
語 文 | 中文(Chinese) |
中文摘要 | 農產品的光電性質可應用於農產品品質的判斷與分級。光電選別具有高速、準確、非破壞性與客觀等多項優點。本項蕃茄顏色之光電選別研究,即是利用蕃茄表面光反射特性建立品質指標。選別部以發光二極體為光源,光二極體為光接收器,配合放大電路將蕃茄之反射光轉換為類比電壓訊號,再經類比數位轉換器轉換為數位訊號,並輸入Z-80單板微電腦中進行計算與判斷,以選出紅色或綠色蕃茄。整個選別過程以Z-80作準確的時間與動作控制。 本研究由先始實驗建立品質指標,再分別以靜態和動態實驗證實其可行性,同時求得紅綠蕃茄的選別指標。以不同光接收器與不同皮帶速度作顏色選別實驗,其精確度均達96﹪以上。 |
英文摘要 | The electro-optical properties of agricultural products can be applied to quality evaluation and material sorting. The electro-optical sorting can provide high-speed, accurate, nondestructive and objective measurements. In this research, the surface reflectance characteristics of tomatoes were used to develop a quality index for sorting. Regarding the design of the sorting unit, LED's and photo diodes were employed as light sources and detectors respectively. An amplification circuit was used to transfer the reflectance light of tomatoes into analog voltage signal, then an A/D converter was selected to convert it into digital signal. The Z-80 single-board microcomputer was then used to perform calculations and judgment for red or green tomatoes evaluation. The timing and operations of entire sorting procedure were accurately controlled by the Z-80 microprocessor. A quality index was constructed based on preliminary experiments. The feasibility was proved and the modification of the index for red/green tomatoes was carried out by further experiments on static and dynamic measurements. The results shows that the average accuracy of color sorting is above 96﹪ for different kinds of photo detectors at several belt speeds. |
本系統中英文摘要資訊取自各篇刊載內容。