科研之友
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摘要
We present a novel method for on-line measurement of round steel parameters with a multi-line structured light vision sensor. In this paper, the mathematical model of the multi-line structured light vision sensor is established, and the measurement principle and algorithms are proposed. Firstly, the 3D coordinates of cross section ellipses formed by the structured light planes and the round steel surface are extracted, and the spatial ellipse centers are fitted. Secondly, the virtual axis of round steel is constructed based on the fitted spatial centers, and a virtual plane perpendicular to the round steel virtual axis through an arbitrary point on the axis is established; then cross section ellipses are projected to the virtual plane vertically and we can get the corresponding projective circles which denote the actual circumference of the measured round steel. Finally, the diameter, roundness, straightness and other parameters of round steel can be estimated. It shows that the proposed method is valid, flexible and with high precision by experiment, and the measured relative error of the round steel diameter is less than 0.8% and repeatability exceeds 0.15 mm.
- 出版日期2010-2
- 单位天津大学
