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

Method and Application of Spatial Rotation Axis Determination Based on Cylinder and Line Structure Cursor

A line-structured light and rotary axis technology, applied in the direction of optical devices, instruments, measuring devices, etc., can solve the problems of inability to achieve rotary axis calibration, rotary axis error, etc., and achieve the effect of reducing workflow and accurate measurement data

Active Publication Date: 2021-01-26
SICHUAN UNIV
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional calibration of the rotary axis of the turntable is to introduce a standard ball to calibrate the rotary axis of the rotary table, but the standard ball can only realize the calibration of the rotary center of a section, and cannot realize the calibration of the rotary axis. error

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
  • Method and Application of Spatial Rotation Axis Determination Based on Cylinder and Line Structure Cursor
  • Method and Application of Spatial Rotation Axis Determination Based on Cylinder and Line Structure Cursor
  • Method and Application of Spatial Rotation Axis Determination Based on Cylinder and Line Structure Cursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment provides a method for calibrating the axis of rotation based on a cylinder and a line structured light sensor. The method is realized based on a four-axis measurement system. The four-axis measurement system includes the translation amount X along the X axis, axis translation Y, translation Z along the Z axis, and rotation R around the axis of rotation. By controlling the translation X, Y and Z, the relative positional relationship between the control line structured light sensor 100 and the object to be measured is realized. By controlling the rotation R controls the different circumferential surfaces of the object to be tested.

[0022] The method for calibrating the axis of rotation based on the cylinder and the line structured light sensor described in this embodiment specifically includes the following steps:

[0023] (1) Pose calibration of line structured light sensor

[0024] The position and orientation of the line structured light sensor 100 i...

Embodiment 2

[0042] In this embodiment, the method for calibrating the axis of rotation in Embodiment 1 is applied to the three-dimensional appearance detection and curve feature detection of the blade. The specific detection steps are as follows:

[0043] (A) Calibration: the calibration refers to the calibration of the pose and the axis of rotation of the line structured light sensor in Embodiment 1;

[0044] (B) Data measurement of blades:

[0045] Place the blade to be tested on the turntable, control the translation amount X, Y, Z to make the line structured light sensor return to the initial position, the initial position refers to the position where the cylinder profile data is detected for the first time, according to the principle of first rotating and then lifting The principle is to collect the profile data of the blade to be tested. Assuming that k times of movement (including translation and rotation) are performed, then k profile data will be collected (L 1 , L 2 ,...,L k ...

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 invention discloses a method and application thereof for calibrating a space rotation axis based on a cylinder and a line-structured cursor. The calibration of the space rotation axis includes: (1) placing the cylinder on a turntable, and the line-structured light sensor acquires the cylinder The contour data and obtain the center coordinate C according to the contour data 1 ; (2) After the turntable rotates at an angle θ, the line structured light sensor acquires the contour data of the cylinder again to obtain the coordinate C of the center of the circle 2 ; (3) through the center coordinate C 1 、C 2 and angle θ to calculate the coordinate data L of the rotary axis in the initial data coordinate system 0 ;Move the line structured light sensor along the height direction of the cylinder, the moving distance is z, repeat steps (1) to (3) to obtain the L of the rotation axis in the initial data coordinate system i , and finally the linear fitting is used to obtain the rotary axis, that is, to realize the calibration of the rotary axis. The method provided by the invention can quickly realize the calibration of the axis of rotation, and can be applied to the field of blade detection.

Description

technical field [0001] The invention belongs to the field of line structured light sensor measurement, in particular to a method for calibrating a rotation axis based on a cylinder and a line structured light sensor and an application thereof. Background technique [0002] As a key component in aero-engines, gas turbines, steam turbines and other equipment, blades undertake the important task of converting heat energy into mechanical energy. The shape and quality of blades directly affect the energy conversion efficiency and service life of the whole machine. Because the three-dimensional surface of the blade is an irregular curved surface and the profile of each section height is different, it increases the difficulty of blade detection. [0003] The four-axis measurement system based on the line structured light sensor requires a system that detects the curve characteristics of the blade section through multi-view data splicing. The system needs to check the pose of the li...

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): G01B11/27G01B11/25G01B11/00
CPCG01B11/002G01B11/25G01B11/2504G01B11/27
Inventor 谢罗峰刘浩浩王宗平殷鸣欧登荧殷国富
Owner SICHUAN UNIV