Sometimes it is needed to measure the motion parameters of a space motion component, including displacement, velocity
and acceleration of certain points or angular displacement, angular velocity and angular acceleration of a component.
Aiming at this problem, we proposed a new method using two color CCD cameras to measure the motion parameters of
a space motion component. A specific method was studied to measure the space coordinates of two points in a cylindrical
component with two color CCD cameras. Straight lines in different color were marked uniformly on the surface of a
cylindrical component. The lengths of the straight lines were same and the end points were on two circles of the
cylindrical surface. Two color CCD cameras were placed according to a certain angle and calibrated. Time varying
images of the cylindrical component in space motion were taken by the two color CCD cameras simultaneously. The
pixel coordinates of the straight line end points were extracted from the images by a computer program for image
processing. Then their space coordinates were calculated. The space coordinates of the two circle centers were obtained
from the space coordinates of the straight line end points. According to the space coordinates of the two circle centers
and the time intervals between successive photographs, the motion parameters of the cylindrical component was
calculated by using numerical method. The result from this system is basically consistent with actual situation.
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