科研之友
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摘要
Alignment deviation is an important factor affecting measurement accuracy in screw thread measurement. It needs to be detected and controlled to ensure the accuracy of relative thread parameters. The influence on pitch diameter caused by the alignment deviations of workpiece and probe is analyzed in this paper. In order to detect and control the alignment deviation, a vision detection method for the probe tip points is proposed, which integrates the detection of corners and edges and the prediction of motion. Then the X-axial rotation deviation is calculated by tracking the tip points both up and down. The result of tests demonstrates that the detection accuracy of the X-axial rotation deviation is 0.0654 degrees with the background changing during the probe movement. The repeatability of the test procedure is +/- 0.16%, which proves the detection method is adequately qualified for application.
- 出版日期2013-8
- 单位南京航空航天大学
