|
He Tao
Zhong Ming
Li Wei
Zhong Yuning
Shi Tielin
School of Mechanical Science
and Engineering,
Huazhong University of Science
and Technology,
Wuhan 430074, China |
|
|
MULTIPARAMETER MEASUREMENT
FOR RACEWAY GROOVE OF BEARING
BASED ON 3D RECONSTRUCTION
WITH DIGITAL STRUCTURED LIGHT*
Abstract:
A fast 3D reconstruction method based on structured light to measure various parameters of the raceway groove is presented. Digital parallel grating stripes distributed with sine density are projected onto the raceway groove by a DLP projector, and distorting of stripes is happened on the raceway. Simultaneously, aided by three-step phase-shifting approach, three images covered by different stripes are obtained by a high-resolution CCD
camera at the same location, thus a more accuracy local
topography can be obtained. And then the bearing is rotated on a
high precision computer controlled rotational stage. Three
images are also obtained as the former step at next planned
location triggered by the motor. After one cycle, all images
information is combined through the mosaics. As a result, the 3D
information of raceway groove can be gained. Not only geometric
properties but also surface flaws can be extracted by software.
A preliminary hardware system has been built, with which some
geometric parameters have been extracted from reconstructed local topography.
Key words:
Structured light Fringe projection Phase-shifting Multiparameter measurement 3D reconstruction
|