查詢結果分析
來源資料
頁籤選單縮合
| 題 名 | 微電腦控制農產品重量選別系統之基礎研究 |
|---|---|
| 作 者 | 扶亞民; 王康男; | 書刊名 | 農業工程學報 |
| 卷 期 | 36:1 1990.03[民79.03] |
| 頁 次 | 頁11-25 |
| 分類號 | 434.251 |
| 關鍵詞 | 控制; 微電腦; 農產品; 選別; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本研究主要的目的在從基礎探討出一套既精確且高速化的微電腦控制果蔬重量選別系統。實驗分兩部份進行,均使用自行設計之動態秤重裝置: 1. 個人電腦PC/AT之先期資料擷取與分析: 採用16位元之PC/AT個人電腦,以及14BITS之類比數位轉換卡,擷取秤重台被放大過的量重做號,再使用LOTUS等軟體分析處理。 2.以蘋果二號微電腦為重量選別系統之主控部份: 採用蘋果二號微電腦,以及紅外線近接開關、八位元類比數位轉換卡做重量訊號之擷取。再透過66522VIA卡,送出重量判斷值至發光二極體七段顯示器,以及分級控制板。 由第一部分之實驗結果分析顯示,在99%信賴度下,動態秤重裝置空轉時,信號有±7公克之跳動情況,作頻度分析後,發現可用算術平均處理:信號經過平均處理,不論靜態或動態均可得到±0.6公克內的誤差範圍,精度大增。秤重速度語實驗結果經分析顯示可達每分鐘約100個以上。 第二部份之實驗結果分析顯示,在此系統下,若以秤重速度為26cm/sec,或每分鐘60個左右時,總誤差約在±1.3%FSO(全標度輸出百分數;percent full scale output)內。此項誤差系因類比至數位卡解玎度限制,及以組合語言撰寫重量選別控制程式時,計算上不使用浮點運算,有去尾的誤差。 |
| 英文摘要 | The main purpose of this study is to make a basic investigation into accurate and high-speed micro-computer controlled weighting-and-grading system. A 16-bit personal computer (IBM-AT) and 14-bit analog-to-digital converted card were used to form a data acquisition system (DAS). The acquired signal was converted into floppy disk which could be processed and analyzed by “LOTUS” software. A system with weighting and grading functions was subsequently designed. This system was composed of weight-cell mechanism, an APPLE Ⅱ microcomputer, an I/O card, an A/D card, display cards and a grading control card, etc…. After the data was analyzed, it was found that: 1.) The output signal of weight-cell mechanism was of normal distribution. 2.) At 99% confidence level the range of signal vibration did not exceed 7 grams. 3.) The accuracy can be greatly improved if the acquired data is arithmetically averaged—the confidence interval became 8.6gm, at alpga=1% after arithmetic averaging. 4.) The weighting-and grading rate can reach a speed up to 100 pieces per minute. A proto-type weighting and grading systemusing 6502 CPU as the control was constructed. The error of weighting was approximately 1.3% at the rate of 60 pieces per minute. The major error was from the 8-bits A/D card as the resolution was only 1/255. The minor error was from weight computation which was determined by integer calculation and not floating-point calculation. |
本系統中英文摘要資訊取自各篇刊載內容。