Line structured light vision measurement calibration method and system
A technology of visual measurement and line structured light, which is applied in the field of instrument control, can solve problems such as limiting the accuracy of measurement, and achieve the effects of easy acquisition, easy promotion and use, and simple calibration methods
Active Publication Date: 2021-05-04
CHINA GENERAL NUCLEAR POWER OPERATION +2
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Problems solved by technology
At present, mm-level precision measurement has been achieved in the general industrial field, but if you want to achieve higher precision measurement, for example, the precision is ≤0.05mm, the existing calibration technology limits the accuracy of measurement, therefore, camera calibration and laser plane calibration Accuracy becomes the key to guaranteeing measurement accuracy, so if you want to achieve higher precision measurement, you need to improve the accuracy of the original camera calibration and laser plane calibration
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[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0051] figure 1 It is a flow chart of Embodiment 1 of the line structured light vision measurement and calibration method of the present invention. In the line structured light vision measurement and calibration method of this embodiment, the following steps are performed during the initial calibration:
[0052] Step S10. By adjusting the relative position of the horizontal laser and the vertical laser, the positions of the two meet the first position conditio...
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The invention relates to a line structured light vision measurement calibration method and system.The line structured light vision measurement calibration method comprises the following steps during initial calibration: adjusting the relative positions of a transverse laser and a longitudinal laser to enable the positions of the transverse laser and the longitudinal laser to meet a first position condition; taking a gauge block as a calibration target, and adjusting the position of the gauge block on a target plane to enable the gauge block to meet a second position condition; and S30, acquiring an image picture acquired by a camera, and analyzing the acquired image picture to acquire a reference pixel width value / a reference pixel length value. By implementing the technical scheme of the invention, the calibration target is the gauge block which has the characteristics of extremely high precision, easiness in acquisition and easiness in popularization and use in an industrial scene; and moreover, the method is simple, and only the gauge block needs to be moved.
Description
technical field [0001] The invention relates to the field of instrument control, in particular to a method and system for visual measurement and calibration of line structured light. Background technique [0002] Line-structured light vision measurement method is more and more used in the industrial field, which has the advantages of non-contact measurement, intuitive display, high accuracy, good stability, and strong anti-interference ability. At present, mm-level precision measurement has been achieved in the general industrial field, but if you want to achieve higher precision measurement, for example, the precision is ≤0.05mm, the existing calibration technology limits the accuracy of measurement, therefore, camera calibration and laser plane calibration Accuracy has become the key to guaranteeing measurement accuracy, so if you want to achieve higher-precision measurement, you need to improve the accuracy of the original camera calibration and laser plane calibration. ...
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IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 陈永伟索凌平邱河文邹克峰何思源周小维胥籽任
Owner CHINA GENERAL NUCLEAR POWER OPERATION