The measuring characteristics of optical strain gage

• Main Authors: zeng bor-uei, 曾柏崴
• Other Authors: Shei Hung-Jung
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/64529985877124204538

碩士 === 中華技術學院 === 機電光工程研究所碩士班 === 95 === This research is about the making of the self-made optical strain gauge based on the theorem of single-slit and to find out the characteristics of optical strain gauge by the standard manner of measurements. Compared to traditional strain gauge, the cost of a self-made single-slit optical strain gauge is much more inexpensive than an traditional one and easy to make. During the making of the self-made single-slit optical strain gauge might cause several inaccuracies and the limit of gap of the slit. The error finding and its regression analysis will be discussed in this study. A customized optical strain gauge built on single slit diffraction theory is to cooperate with image capturing system and a precious measurement method will be done. The accuracy of image capturing system is much better than the traditional ruler by naked eye. Thanks to digital image processing, the length of the zero order fringe will be obtained by CCD and to create a regression curve with the result followed by various specimens with different widths of the slits. We can define a correction if the tolerance is within the standard. Keywords: single slit、diffraction、laser、CCD and image capturing