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題名 | 二維流場質點追跡自動測速之研究=Two-Dimensional Digital Particle Tracking Velocimetry (DPTV): An Investigation of Auto-Processing |
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作者 | 陳塗盛; 邵揮洲; 黃明哲; | 書刊名 | 成功大學學報 |
卷期 | 32(科技.醫學篇) 民86.11 |
頁次 | 頁93-114 |
分類號 | 440.137 |
關鍵詞 | 流場質點追跡; 自動測速; 二維流場; Particle tracking; Auto-processing velocimetry; Two dimensional flow field; |
語文 | 中文(Chinese) |
中文摘要 | 過去以PLV的測速方法量測流體中的流速時,都要複雜的拍攝和重建過程,無法 在短時間內取得流場之流速分佈。近幾年則因影像處理技術的發展,而有DPIV測速方法的 提出,直接使用數位相機來取得流場影像並進行分析,但仍脫離不開複雜的分析過程和電腦 記憶體的限制。 本文則採用DPTV之測速方法,直接使用數位相機取得流場中四段時間色碼之紋線.將 數十張甚至數百張的流場影像,經即時重且處理只需要一個影像的記憶體,節省許多記憶體 間,再應用影像處理技術,自動處理和辨認所取得之紋線,建立一套自動測速之系統。 建立自動測速系統之後,本文再以方形截面之直立管流賈驗,來驗證本文所發展之測速 系統以自動化影像處理的功能,可輕易取得速度與方向的資訊,可應用於二維穩定流場的定 量分析。 |
英文摘要 | Digital Particle Tracking Velocimetry (DPTV) is a fall-field two dimensional, noninvasive, quantitative flow visualization techniques. The technique described here includes the novel use of direct digitization of particle images using a 512*512 pixel's resolution imaging system. And this image data can be analyzed directly or stored for farther analysis by new image processing and analysis software developed for flow experiments. In this technique, one image of four color-streaks with embedded time-mark which combined tens or hundred of frames in real time are recorded. This image of four color-streaks needs only one frame memory to store in computer memory. The analysis software uses thinning algorithm to process and connectivity to recognize the four color-streaks. So it is better than Digital Particle Image Velocimetry (DPIV) which needs many computer memories to store particle images and complex processing procedure, and also better than Pulsed Laser Velocimetry (PLV) which needs complex recording and reconstruction system. After developing the software of the auto-processing velocimetry, two cases are used to test its availability in this thesis. The experiment in a vertical channel has been verified. The availability of the velocimetry developed in this paper can be proved. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。