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Vision measuring method for spaced round geometrical parameters

A stereoscopic vision measurement and space technology, applied in the field of measurement, can solve the problems of not realizing circle radius measurement, etc., and achieve the effect of reducing measurement error, improving the degree of automation, and broadening the scope of application

Inactive Publication Date: 2005-01-19
HUANGSHI BANGKE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the plane where the circular hole is located is at a large angle to the two image planes of the sensors that make up the stereo vision, due to the shape distortion of the circular perspective projection, there is a large error in this method, and the radius of the circle and the plane of the circle are not achieved. Measurement of normal vector

Method used

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  • Vision measuring method for spaced round geometrical parameters
  • Vision measuring method for spaced round geometrical parameters
  • Vision measuring method for spaced round geometrical parameters

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Experimental program
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Embodiment

[0069] According to the steps described above, use two Mintong 368P CCD cameras and a 25mm Japan Seiko lens to form a binocular stereo vision sensor, and measure a circular hole with a diameter of D = 45.50mm. first use figure 1 The shown planar calibration target calibrates the CCD camera and the structured light vision sensor, and the distance between adjacent feature points in the planar target is 9±0.005mm. The obtained calibration parameters are:

[0070] Internal parameters of the left camera: A l = 4215.176 0 253.506 0 4203.932 383.968 0 0 1 ...

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Abstract

This invention belongs to measuring technique field and relates to improvement for space round geometry parameters non-contact measuring method. This invention can calculate eh real three dimensional coordinates of round fringe by use of polar line restriction and calculate space round geometry parameters based on space round optimal fit. This invention reduces the measuring error caused by shape distortion of space round perspective projecting and increases the measuring accuracy of round geometry parameters based on the optical method. When the surface of space round to be measured is angle more than fifty degrees, the repeatability accuracy 3sigma of space round geometry center is superior to minus or plus 0.01 mm.

Description

technical field [0001] The invention belongs to the technical field of measurement and relates to the improvement of a non-contact measurement method for geometric parameters of a space circle. Background technique [0002] A circle is the basic geometric shape of an object, such as various workpieces, positioning holes on parts, etc. The three-dimensional space position of the geometric center of these round holes and the accuracy of the radius of the circle have a great influence on the successful installation of parts and the overall positioning of the object. Significance. The geometric parameters of the general round hole space can be measured by a three-coordinate measuring machine. The accuracy of the three-coordinate measuring machine can meet the accuracy requirements of the circle in most occasions. It cannot meet the needs of the installation site, especially the measurement of large round holes. Visual inspection technology is the most promising new technology ...

Claims

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Application Information

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IPC IPC(8): G01B11/03G02B27/22G06T15/00H04N5/225
Inventor 周富强张广军
Owner HUANGSHI BANGKE TECH CO LTD
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