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Two-dimensional and three-dimensional composite measuring instrument and its data fusion calibration method

A composite and measuring instrument technology, which is applied in the direction of measuring devices, instruments, and optical devices, can solve problems such as time-consuming errors, complex overall structures, and inability to obtain surface profile information, achieving fast, accurate measurement, and precise high degree of effect

Active Publication Date: 2019-05-10
ZHEJIANG HANCHINE AI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, three-dimensional measuring instruments or sensors based on structured light are installed with industrial cameras perpendicular to the stage, and the light source and the vertical optical axis of the industrial camera lens are installed at a certain angle, which will cause part of the surface of the measured object to be unable to be illuminated by the light source. Then the surface contour information of this part cannot be obtained
Although this type of defect can be partially overcome by rotating the measured object, it complicates the overall structure, and the matching of feature points and data splicing calculations are time-consuming and will inevitably bring large errors, and because the rotating platform replaces the plane Mobile platform, unable to measure larger objects
More importantly, the existing 3D profilers cannot measure common structural shapes such as deep holes and deep grooves.

Method used

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  • Two-dimensional and three-dimensional composite measuring instrument and its data fusion calibration method
  • Two-dimensional and three-dimensional composite measuring instrument and its data fusion calibration method
  • Two-dimensional and three-dimensional composite measuring instrument and its data fusion calibration method

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Embodiment 1

[0027] Such as Figure 1-5 As shown, a two-dimensional and three-dimensional composite measuring instrument includes an object stage, an active image acquisition module 1, a control and data processor 3, and a bracket. The object stage has a light-transmitting object-carrying plane for placing the object to be measured, thereby ensuring that light can pass through the light-transmitting object-carrying plane. The active image acquisition module 1 can collect the contour information of the object to be measured, and the control and data processor 3 is connected to the active image acquisition module 1 and the stage 2 . The active image acquisition module 1, the stage and the control and data processor 3 are all arranged on the bracket. The support includes a support structure 4 and a base 5 connected to the support structure 4 . The bracket can support the whole measuring instrument.

[0028] Specifically, the active image acquisition module 1 includes an image acquisition m...

Embodiment 2

[0039] This embodiment is a data fusion calibration method utilizing the two-dimensional and three-dimensional composite measuring instrument described in Embodiment 1, comprising the following steps:

[0040] (a) Establish the three-dimensional coordinate system of the calibration block, determine the coordinate origin, use the calibration instrument to measure the four apex plane coordinates of all square through holes 62 of the calibration block 6, and the set of four apex coordinate values ​​of all square through holes 62 is recorded as Rxy ; Measure the XYZ coordinates of the joints of the left elevation 631, the high level 634, the right elevation 632 and the low level 633 of all monomers of the calibration block 6, and record the set as Rxy.

[0041] (b) Place the calibration block 6 on the stage of the two-dimensional and three-dimensional composite measuring instrument, so that the outer contour of the calibration block 6 is completely within the field of view of the a...

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Abstract

The present invention belongs to the two-dimensional and three-dimensional measurement technical field and relates to a two-dimensional and three-dimensional combined measuring instrument and a data fusion calibration method thereof. The two-dimensional and three-dimensional combined measuring instrument comprises a carrying table, an active image acquisition module set which can acquire the contour information of an object to be measured, and a control and data processor connected with the active image acquisition module set; the active image acquisition module set includes an image acquisition module arranged just above the carrying table, a parallel backlight located just below the carrying table, and 4 or N structural light projectors which are uniformly and obliquely distributed at the periphery of the image acquisition module, wherein N is an even number larger than 4; the parallel backlight can emit light vertical to the carrying table; and the structural light projectors can emit structural light which forms a certain included angle with the optical axis of then image acquisition module. With the two-dimensional and three-dimensional combined measuring instrument and the data fusion calibration method thereof of the invention adopted, the two-dimensional and three-dimensional information of the surface of the measured object can be measured omni-directionally in a dead corner-free manner, and the speed and accuracy of measurement are high. The two-dimensional and three-dimensional combined measuring instrument and the data fusion calibration method thereof can be especially used for accurately measuring objects with deep hole and deep groove type surface features.

Description

technical field [0001] The invention relates to the technical field of two-dimensional and three-dimensional measurement, in particular to a two-dimensional and three-dimensional composite measuring instrument and a data fusion calibration method thereof. Background technique [0002] Three-dimensional measurement technology is used in many fields such as industrial automatic inspection, product quality control, reverse design, and virtual reality. The huge application market demand has prompted the rapid development of various three-dimensional measurement methods and technologies. The emerging commercial measuring instruments include contact three-coordinate measuring machines and joint coordinate measuring machines, as well as non-contact measuring machines based on acoustics, optics and electromagnetics. measuring equipment. With the development of computer vision, digital image acquisition technology and precision optical devices, more and more 3D optical measurement t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/00
CPCG01B11/00
Inventor 文双全费正顺刘彧鹏陈贵
Owner ZHEJIANG HANCHINE AI TECH CO LTD