公开(公告)号：US20210095959A1

公开(公告)日：2021-04-01

申请号：US16647654

申请日：2019-05-15

Applicant: Dalian University of Technology

Inventor： Wei LIU ,  Bing LIANG ,  Mengde ZHOU ,  Kun LIU ,  Yang ZHANG ,  Di FENG ,  Xintong JIANG ,  Likun SI ,  Zhenyuan JIA

IPC: G01B21/04 ,  B25J9/16 ,  B25J19/02

Abstract: A 3D measurement model and the spatial calibration method based on a 1D displacement sensor are proposed. A 3D measurement system based on a fixed 1D displacement sensor is established; then a spatial measurement model based on the 1D displacement sensor is established; and then based on the high precision pose data of the measurement plane and sensor measurement data, spatial calibration constraint equation are established; a weighted iterative algorithms is employed to calculate the extrinsic parameters of the 1D sensor that meet the precision requirements, then the calibration process is completed. A high precision 3D measurement model is established; a 3D measurement model based on a 1D displacement sensor is established, and the calibration method of the measurement model is proposed, which will improve the precision of the 3D measurement model and solve the problem of inaccurate spatial measurement caused by the errors of the sensor extrinsic parameters.

公开(公告)号：US20210048791A1

公开(公告)日：2021-02-18

申请号：US16753206

申请日：2019-08-19

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Jianwei MA ,  Zhenyuan JIA ,  Xiao LU ,  Wenwen JIANG ,  Xiaoxuan ZHAO ,  Wei LIU ,  Likun SI

IPC: G05B19/402

Abstract: A toolpath topology design method based on vector field in sub-regional processing for the curved surface is disclosed which comprising: finding the functional relationships in feeding direction between the chord error and the normal curvature and between the scallop-height error and the normal curvature; establishing the bi-objective optimization model and calculating the optimal feeding direction at each cutting contact point within the surface through the constructed evaluation function, the space vector field is built; calculating divergence and rotation of the projected vector field and according to whether them are zeros or not to classify different sub-regions, the primary surface segmentation is achieved, etc. The method is applied for the complex curved surface processing, which can reduce the machining error and enhance the feed motion stability.