| Summary: | 碩士 === 南台科技大學 === 機械工程系 === 97 === In this study, projection Moiré method was use to measure the surface profile of fish in
water. Grating lines were projected to fish body by projector and the grating images were
captured by CCD camera. Fourier transform profilometry method was use to calculate the
phase information from the distorted grating and related the phase information to the
profile of fish body. The profile information, after smoothed, was used to create solid
model. Furthermore, in order to understand the propulsion mechanism of fish, the
undulation of fish was study. In this work, the steady straight swimming and fast start of
carangiform fish were investigated. The locomotion of fish under investigation was
recorded by CCD camera and then the backbone motions were extracted by finding the
centerlines from the images of fish motion. Mathematical models were used to describe the
locomotion of fish, the suitable parameters were found by using least mean square fitting
method.
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