Mr. Sh. M. Yang Profile

Sh. M. Yang

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Proceedings Article | 6 August 2009 Paper

Study on measuring the motion parameters of a space motion component with two CCD cameras

Shiming Yang, Yechu Hu

Proceedings Volume 7384, 738413 (2009) https://doi.org/10.1117/12.835218

KEYWORDS: Motion measurement, CCD cameras, Calibration, Cameras, RGB color model, Imaging systems, MATLAB, Photography, Head, Image processing

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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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