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All-angle imaging standard ruler

A standard ruler and full-angle technology, applied in the field of measuring tools, can solve problems such as the limitation of the imaging angle of the standard ruler

Active Publication Date: 2017-09-05
BEIJING INFORMATION SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides an all-angle imaging reference ruler to solve the problem of imaging angle limitation of the reference ruler in large-scale close-range photogrammetry

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0072] Figure 5 Shown is the physical display figure of the full-angle imaging standard ruler of the present invention, as Figure 5 In this implementation shown, the main material of the full-angle imaging scale is selected from steel. Compared with carbon fiber materials, steel has a smaller diameter, and it is more difficult to identify barcodes on the image surface, and it is easy to verify the validity and reliability of the algorithm. sex.

[0073] The bar code combination that adopts in the present embodiment is 51 (110011) and 45 (101101), and relevant length is calibrated by the special-purpose length measuring instrument of reference ruler, wherein AD=1096.032mm, AB=158.586mm, CD=133.255mm, then BC=AD-AB-CD=804.191 mm.

[0074] In order to test the actual application effect of the reference ruler, it is placed in different positions of the large indoor three-dimensional control field. Identify manufacturing distractions. Nikon D2X digital camera was used to imag...

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Abstract

The invention discloses an all-angle imaging standard ruler which comprises a body, standard length endpoints and a standard ruler identification encoding. The standard length endpoints are spherical mark points coated with self-reflective materials, arranged at the front end and the tail end of the body and fixedly connected with the body, the standard ruler identification encoding is provided with a one-dimensional bar code, and the one-dimensional bar code is longitudinally lengthened and winds the body of the standard ruler in a 360-degree manner. According to the all-angle imaging standard ruler, all-angle reflection of incident light is achieved by the aid of spherical self-reflective mark points, the encoding is provided with the one-dimensional bar code, and the one-dimensional bar code is longitudinally lengthened and winds the body of the standard ruler in a 360-degree manner, so that all-angle imaging and bar encoding identification are achieved. According to the all-angle imaging standard ruler, all-angle imaging of the standard ruler is achieved in measurement space.

Description

technical field [0001] The invention relates to a measuring tool, in particular to an all-angle imaging reference ruler. Background technique [0002] In recent years, with the rapid development of science and technology, especially the rapid development of advanced manufacturing technology with digitalization as the core, the demand for industrial precision three-dimensional measurement technology is increasing. The three-dimensional industrial measurement systems currently used mainly include three-dimensional coordinate measuring machines, theodolites, total stations, laser trackers, laser scanning measurement systems, articulated coordinate measuring machines, indoor GPS, digital industrial photogrammetry systems, etc. Among them, digital industrial photogrammetry uses a digital camera to take photos of the measured object, and then obtains the three-dimensional spatial geometric information of the measured object through digital image processing, 3D reconstruction optim...

Claims

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Application Information

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IPC IPC(8): G01C25/00G01B11/00
CPCG01B11/005G01B21/042G01C25/00
Inventor 王君董明利孙鹏燕必希
Owner BEIJING INFORMATION SCI & TECH UNIV
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