Keywords

Digital Image Processing, DIC Methods, PIV Methods, Hough Transform, Motion Measurement, Rotation Measurement, Displacement Measurement, Sub-Pixel Accuracy Measurement

Rotation Measurement of an Impacting Sphere Using Digital Image Correlation Methods

A new experimental method has been developed based on DIC (Digital Image Correlation) methods in order to measure the rotation of a sphere impacting an elastic surface. A set-up was designed to check the validity of the method. The impact of a sphere with an oblique surface has been analyzed for different initial velocities. Random speckles were sprayed on the sphere surface and were used for the image processing. A robotic arm drops the sphere vertically without initial spin on the oblique surface. The motion of the sphere was captured with a highspeed camera with 10,000 fps and the resolution of 1024x512 for each frame. The rotation of the sphere after the impact has been calculated. The presented work can be considered as an accurate experimental method in variety of applications such as the rolling element bearings testing and the gears testing.

Authors and Company/Institution

Hamid Ghaednia, Ozdes Cermik and Dan Marghitu, Department of Mechanical Engineering, Auburn University, Auburn, AL