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Calibration method of XYtheta platform machine vision alignment system

A technology of machine vision and calibration method, applied in the direction of instruments, image data processing, calculation, etc., can solve the problem of inability to guarantee the assembly accuracy, and achieve the effect of high precision and strong adaptability

Active Publication Date: 2020-06-09
深圳市精昱智能技术有限公司
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Problems solved by technology

Assembly accuracy cannot be guaranteed due to mapping inequality

Method used

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  • Calibration method of XYtheta platform machine vision alignment system
  • Calibration method of XYtheta platform machine vision alignment system
  • Calibration method of XYtheta platform machine vision alignment system

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Embodiment Construction

[0026] 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.

[0027] See figure 1 , a method for calibrating an XYθ platform machine vision alignment system provided by the present invention, wherein the XYθ platform machine vision alignment system includes an A image acquisition device 120, an A platform 110, a B image acquisition device 220, and a B platform 210, The A platform and the B platform are both adsorbed with a calibration plate 160, and the calibration plate 160 is provided with a plurality of circular targe...

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Abstract

The invention relates to a calibration method of an XYtheta platform machine vision alignment system. The XYtheta platform machine vision alignment system comprises an image acquisition device A, a platform A, an image acquisition device B and a platform B, calibration plates are adsorbed on the platform A and the platform B, each calibration plate is provided with a plurality of circular targetsarranged transversely and longitudinally, and the circular targets are distributed at equal intervals. In the calibration method, a fixed virtual coordinate system relative to image coordinates is established by applying the high-precision calibration plates, and the coordinate system serves as an intermediate transformation factor. The controlled platform moves for a fixed distance; obtaining reference point image coordinate changes and platform coordinate changes on the calibration plate; the coordinate transformation relation among the image, the virtual coordinate system and the platform coordinate system is calculated, calibration of the platform is completed, the problem that the precision error is large due to the fact that the platform is installed in a split mode and cannot move in the X-Y coordinate direction on respective image planes to achieve precise calibration is solved, and high adaptability and extremely high precision are achieved.

Description

technical field [0001] The invention relates to a calibration method for an XYθ platform machine vision alignment system. Background technique [0002] In the manufacturing fields of computers, communications, consumer electronics and components, it is often necessary to install two or more components in alignment. The accuracy of the installation directly determines the quality of the product. In the production process, the machine vision alignment system is generally used to achieve the alignment of parts. The mechanism platform also mostly uses the XYθ platform mode, and is installed separately as A and B platforms. [0003] Such as figure 1 As shown, the platform A 110 includes the X axis of the motion mechanism, the θ axis, and the A image acquisition device 120 , and the B platform 210 includes the Y axis of the movement mechanism, and the B image acquisition device 220 . The A object 130 is placed on the A platform, and the B object 230 is placed on the B platform....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/80
CPCG06T7/80Y02P90/02
Inventor 覃宇平焦庆华李景权雷晨陈肖涛
Owner 深圳市精昱智能技术有限公司
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