| Summary: | 碩士 === 中原大學 === 機械工程研究所 === 83 === A prototype is an essential step in the manufacturing of
consumer and industrial parts, so a technique for surface
topography measurement of objects becomes very important and
practical in reverse engineering. The methods of profile
measurement include the contact-probe-type system and
noncontact laser-baseed system. The technique, is based on the
principle of measuring profilometry with a projectedlaser
stripe onto a 3-d object and acquiring a brighter laser stripe
through a CCD to construct a free curve by mapping a function
between the world coordinate and the image coordinate. The
measurement system consist of optical set and the a
transporting mechanism with accuracy location and translation
ability. Select five correcting spots from five different
surfaces include the front,back, left side, right side, and top
region of the measured object. Before scanneing every surface,
it need to correct the relation between image plane and world
coordinate by correcting spot. After obtaining all coordinate
of five separate surfacees, the data should be connected to
obtain the complete profile of the object. Since that the
scanned object does not move during the measuring process, This
method is suitable for quickly and efficiently measuring the
profile of an object which is to move.
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