TY - JOUR
AU - Liu, Shifan
AB - Optical devices cannot directly obtain the deformation for welding residual stress (WRS) measurement since it is difficult to get the surface characteristic with a high accuracy of measurement. This paper therefore presents a full-field fast method for WRS measurement based on heterodyne multiple frequency phase shift technology. Furthermore, in order to denoise the acquired point cloud, this paper proposes a novel compensation filter method (CFM) to extract accurate surface topography: specifically, to slice the original point cloud into several independent groups, then smooth each group of the point cloud to obtain the compensation value, and finally to fuse the filtered point cloud with the compensation value to extract surface characteristic. As a result, the simulation and the experiment results show that the CFM can reduce the noise by about 80%. It demonstrates that the novel CFM can maintain the features of the point cloud and remove noise efficiently, indicating the high accuracy of the CFM result and the potential to realize fast WRS measurement.
TI - A compensation filter method for extracting surface characteristic from an optical point cloud
JF - Measurement Science and Technology
DO - 10.1088/1361-6501/ab42f0
DA - 2020-02-01
UR - https://www.deepdyve.com/lp/iop-publishing/a-compensation-filter-method-for-extracting-surface-characteristic-hmGhlRgAjb
SP - 025002
VL - 31
IS - 2
DP - DeepDyve
ER -