| Summary: | 碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 100 === In order to mitigate global warming and to cope with the raising environmental awareness of consumers, enterprises around the world all consider the application of energy saving and carbon reduction as a significant matter of product design while developing and producing new products. Nowadays, the mainstream product in the plastic pipes industry is the spiral plastic hose due to its numerous advantages, such as uneasy to create folds or knots while using, sustainable and a long life cycle. Nonetheless, the quality level is the key factor besides price to break through in the fierce competition in the same product market. In terms of comparing with other products, various test results can be listed in the technical specifications as an important reference indicator for consumers to decide which products to purchase.
This study used the machine vision technology to improve the deficiencies of the preliminary study and adopted dual CCD cameras and CCTV lens to measure the spring-back performance of the spiral plastic hose through the perspective projection in the orthogonal three-dimensional space represented within the observation scope. By using the image processing and the developed human-machine interface program, the inner radius of the plastic hose was measured through the CCD images above the plastic tube, and the coordinates of the feature points of the plastic hose were detected through the CCD images on the right side. Further, the data base of the corrections of each depth distance was established to perform the comparison and to calculate the interpolation. The actual data of the height from the datum plane to feature points were analyzed by the system to conduct the parameter revision, so that the curvature radius of the spiral plastic hose before and after spring-back would be more in accordance with the actual situation.
According to the experimental results of this study, the error amount of the actual height data of feature points is within a range of ±1.0 mm, and the error amount of the arc radius of curvature is within a range of ±0.5 mm. By using the ATOS reverse measurement equipment to perform the system verification, the error amount of the average radius of spring-back curvature is 0.0208 mm. Compared to the preliminary study results, it can be confirmed that there is a significant improvement in the accuracy and stability of the measurement of the radius of spring-back curvature of the three-dimensional spiral plastic hose for the measuring system in this study.
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