| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 98 === The thesis is to develop an automatic optical inspection system
which measures several geometry dimensions of a manifold control valve.
The system includes two different image acquisition modules, separately.
The interface of the system was with the LabView software which
controls the motion and acquisition of the system. An image device was
composed of both the complementary metal oxide semiconductor
cameras (CMOS) and a high rate parallel lens which can take the specific
inner images of the sample. With the data of the characteristic deviation,
we can calculate the offset capacity to measure the distance between two
end points of the inner circle of the oil hole. Another method has been
developed to use the rigid bore scope to take images. With the following
image enhancement, edge detection and other image processing methods,
the oil hole processing capacity could be detected. Meanwhile, we have
applied a Laser Doppler Displacement Meter to calibrate the position
errors of the motion on the table which guarantee the accuracy of the
analysis data.
The system can finish all the required measurements on the
geometry dimensions of the control valve within ten minutes. In addition,
the system can substantially reduce the measuring time in contrast to the
conventional method. Moreover, the circumference data of the control
valve can calculate the eccentric quantity of the rotation table and the
roundness of the control valve. The system designs a simple operate
interface which can complete the measuring procedure in a short time.
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