A Study on Teaching Approach and Effectiveness of Applying Computer Aided Drawing for Design Graphics

• Main Authors: Ming-Chin Chiang, 江明進
• Other Authors: Chih-Fu Wu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/50457259743247262351

博士 === 大同大學 === 設計科學研究所 === 102 === This study provides three experiment results as an educational reference for instructors to help student obtain a better way to learn orthographic views and exploded assembly drawings in design graphic course. First, a visual experiment was held to explore the comprehensive differences between 2D static and 3D animation object features; the goal was to reduce the possible misunderstanding factors in the learning process. This empirical study provided one hundred and twenty Taiwanese freshmen four types of visualization, which includes two 2D static depictions (2DT, 2DR), and two 3D animations (3DT, 3DR), to meet five surface styles on orthographic views. Second, this study presents another empirical study for instructors to assist student to obtain the most adequate demonstration of 2D objects in learning the orthographic views and exploded assembly drawings. A visual experiment was designed to examine the comprehensive differences among four patterns of appearances of object feature and explosive assembly drawing; the goal was to develop the possible teaching and learning strategies in the learning process. This empirical study provided one hundred and twenty-eight Taiwanese sophomores with four types of 3D visualization described by 2D static depictions, which includes wireframe, texture, grayscale, and color, to meet five surface styles on orthographic views and two types of match on assembly drawings. Finally, the study would apply two previous studies to explore the effectiveness for the comprehension about the structure of DIY products with colors on the surfaces of parts in a graphical manual drawn by computer tools. After the experiments, we analyze these data through statistic techniques of ANOVA, t-test &; Chi Square, and all the responses to views ability test and interviews. There are some conclusions to be illustrated as follows. 1. To apply 3D animations shows better performance in understanding the appearances and features of objects constructed by oblique and double-curved surfaces. The application of 3D animations results also demonstrates a better visual comprehension for students, especially when objects are constructed by the complicated features. 2. Regardless of the orthographic views or exploded assembly tests, the applications of grayscale version are the worst perception in the four versions. In orthographic views test, the versions of wireframe and color both have better visual comprehension of objects; but when considering time and cost to create 2D objects, the wireframe version becomes a better and convenient choice. Alternatively, the color version shows the best performance in exploded assembly drawings within the two matches including surfaces and hole to shaft. 3. There will be good perceptibility to discriminate the structures and positions of assembly works when they have colors and apply other design elements (such as numbers, texts, and leaders) on the manuals. Especially, when the DIY products are assembled by the parts of complex shapes, the comprehension is more effective.