Unlock instant, AI-driven research and patent intelligence for your innovation.

Rotary axis calibration method and system for 3D rotary scanning system

A technology of rotating scanning and calibration method, applied in the field of 3D scanning, which can solve the problems of large amount of data and time-consuming processing.

Active Publication Date: 2019-11-19
SHANGHAI JIAOTONG UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of collected data is large and time-consuming to process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rotary axis calibration method and system for 3D rotary scanning system
  • Rotary axis calibration method and system for 3D rotary scanning system
  • Rotary axis calibration method and system for 3D rotary scanning system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0254] In actual operation, first place a rectangular flat plate on the turntable, scan to obtain the first point cloud data, and then scan again to obtain the second point cloud data after the turntable rotates at any known angle θ. The shape precision of the rectangle is not high, and the placement position is random, and it only needs to be fastened, which is why the method provided by the present invention is more convenient than other methods. In this preferred example, the first point cloud data and the second point cloud data collect four feature corner data p i ,q i ,Such as figure 1 , figure 2 As shown, the point cloud homogeneous transformation matrix of splicing the second point cloud data to the first point cloud data is obtained by using the control points. Due to the measurement error, it is impossible for the four feature points to correspond completely. Therefore, the least squares method is used to define cost function T d .

[0255] According to the rot...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a method for calibrating a rotating shaft of a 3D rotary scanning system, comprising the following steps: a matching relationship obtaining step: obtaining the matching relationship between the first point cloud data and the second point cloud data, and the first point cloud data is obtained by Obtained by scanning the measured object on the turntable when it is not rotated, the second point cloud data is obtained by scanning the measured object on the turntable after rotating a known angle; the step of obtaining the splicing relationship: reverse calibration according to the matching relationship The axis of the turntable, and obtain the splicing homogeneous transformation matrix. Correspondingly, the present invention also provides a rotating shaft calibration system of a 3D rotary scanning system. The invention provides a reverse method, which requires simple equipment, no shape and size accuracy requirements, greatly reduces the amount of collected data (only two sets of data are required), can meet the requirements of rapid calibration, and has high precision.

Description

technical field [0001] The present invention relates to the technical field of 3D scanning, in particular to a method and system for calibrating a rotating shaft of a 3D rotating scanning system. Background technique [0002] 3D rotary scanning refers to the use of 3D scanning technology to scan the 3D data of different angles of objects on the rotating platform. After obtaining a series of 3D data, calculate the matching relationship of the 3D data at each angle according to the calibrated axis of the turntable. The technique of stitching them together to form a complete three-dimensional data of an object. In the 3D rotating scanning platform, the splicing of two 3D data from different angles is calculated according to the calibrated rotation axis. Rotary axis calibration refers to the measurement of the spatial relationship between the turntable coordinate system and the three-dimensional data generation coordinate system of the object. According to the homogeneous trans...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00G06K9/62
CPCG01B11/00G06F18/22
Inventor 刘成良朱凯贡亮李彦明黄亦翔刘翔鹏
Owner SHANGHAI JIAOTONG UNIV