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NURBS figure laser broom method

A laser and graphics technology, applied in decorative arts, special data processing applications, printing, etc., can solve the problems that NURBS expressions cannot be used for laser cleaning calculations, etc.

Inactive Publication Date: 2010-12-22
东莞市升力智能科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0007] Firstly, the NURBS expression in explicit rational polynomial form is derived, which solves the problem that the iterative form of NURBS expression cannot be used for laser cleaning calculations

Method used

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  • NURBS figure laser broom method
  • NURBS figure laser broom method
  • NURBS figure laser broom method

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Embodiment Construction

[0018] Below in conjunction with accompanying drawing, and take horizontal cleaning as example the present invention will be further described. The key to laser sweeping of vector graphics is to fill closed contours. The SLF (Scan Line Filling, scan line filling) algorithm in computer graphics is very suitable for laser cleaning of vector graphics. as attached figure 1 As shown, the horizontal scan line S q E. q defined as y = y q , where, q=1,...,m, and m=(y max -y min ) / steplength, where, y max is y min The maximum and minimum y-coordinates of the contour, and steplength is the scanning step. fill line P q，1 P q，2 is the scan line S q E. q The upper segment is formed by the point P q，1 consecrated while at point P q，2 Off light formed. The laser head must move along the scanning line, and move from one scanning line to the next scanning line, that is, from S q Movement to E q , and then move to S q+1 , until the end of the last scanline. Therefore, the rea...

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Abstract

The invention discloses a method for realizing NURBS figure laser broom processing in the technical fields of laser marking and laser engraving processing. The method comprises that: a NURBS expression in an iteration form is converted into an expression in a rational polynominal form, an intersection point of a scanning line and a closed NURBS contour is calculated, laser on / off delay compensation is carried out, a laser motion path is generated, and a multi-task-based control framework is realized. In the method, the closed contour described by the NURBS expression can be received, motion control and laser control instructions are generated, a motion mechanism is driven to move, and the laser on / off control is carried out in the motion process, so fill lines are generated in the closed NURBS contour to generate a NURBS figure.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to laser marking and laser engraving processing technologies. Background technique [0002] Laser has the characteristics of good directionality, high brightness, and good monochromaticity, and has been widely used in industrial production. At present, more than 20 kinds of laser processing technologies have been developed in industrial applications, including laser marking, laser engraving, laser cutting, laser welding, etc. [0003] Laser processing equipment such as laser engraving and laser marking has two modes of movement: hooking and cleaning. The outline is a contour movement for generating curves or polygonal tracks; cleaning is a horizontal (or other angle) scanning movement for generating bitmaps. Image or vector graphics. The input of laser processing is vector or bitmap. Vector graphics are used for contouring motion to generate curves or polygonal trajector...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/435B44B3/00G06F17/50
Inventor 李迪王世勇张舞杰叶峰赖乙宗
Owner 东莞市升力智能科技有限公司
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