Virtual positioning method for optical multiple-parameter measurement

A technology of parameter measurement and positioning method, which is applied in the field of virtual positioning, can solve problems such as complex body shapes, and achieve the effect of rapid adjustment and high-precision positioning

Inactive Publication Date: 2005-05-25
TIANJIN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the project has achieved important application results, due to the complex shape of the car body and many points, lines, and surfaces with six-dimensional parameter characteristics, how to detect the white car actually assembled in the production line without a standard car body as a comparison? The overall error of the body is a big technical problem

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
  • Virtual positioning method for optical multiple-parameter measurement
  • Virtual positioning method for optical multiple-parameter measurement
  • Virtual positioning method for optical multiple-parameter measurement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] In the present invention, according to the measurement principle of the two-dimensional vision sensor, its imaging formula is given. This formula is a mathematical expression for mapping the Yg-Zg plane coordinates of the object space to the Xi-Yi coordinates of the image plane:

[0015]

[0016] for figure 1 In the line structured light model shown in , if a triangle Δabc is imagined on the object space Yg-Zg plane, then a corresponding triangle Δa'b'c' is virtualized on the image plane Xi-Yi through formula calculation. The virtual positioning technology uses this principle to virtualize the ideal position (ideal triangle) of the regular tetrahedron in space on the image plane of the two-dimensional vision sensor corresponding to the two-dimensional vision sensor, and displays the ideal triangle on the computer screen. Draw on it and let it stay fixed.

[0017] The realization of the ideal triangle Δabc in the present invention is obtained by measuring and calcul...

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 virtual positioning method in optical multi-dimensional parameter measurement, which is applied to an optical measurement system composed of a two-dimensional visual sensor and an area array CCD camera, using a hollow regular tetrahedron as the target of the visual sensor to realize The steps of virtual positioning are: after measurement and calculation, determine a standard triangle on the hollow regular tetrahedron and draw it on the screen, which represents the ideal position of the visual sensor relative to the measured edge; The triangle formed by the light strips on the three edges of the hollow regular tetrahedron represents the actual position of the visual sensor relative to the measured edge; adjust the orientation and coordinates of the visual sensor so that the triangle represented by the light strips represents the actual position and the triangle represents the ideal position At this time, the orientation and coordinates of the vision sensor are determined as its measurement location. Compared with the traditional digital adjustment method, the present invention is intuitive, convenient and has high precision.

Description

technical field [0001] The invention relates to a virtual positioning method in optical multi-dimensional parameter measurement. It belongs to the image positioning technology when the optical method is used to measure the shape of multi-dimensional parameters. Background technique [0002] The measurement of the overall error of the automobile body is an important research topic in the domestic and foreign automobile industries. In 1992, the U.S. government funded 5 million US dollars to jointly develop the project by the University of Michigan and Perceptron Corporation. Although the project has achieved important application results, due to the complex shape of the car body and many points, lines, and surfaces with six-dimensional parameter characteristics, how to detect the white car actually assembled in the production line without a standard car body as a comparison? The overall error of the body is a very big technical problem. [0003...

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): G01B21/20
Inventor 王宝光杨则燊陈林才贺忠海廖怡白
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap