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Two-dimensional positioning device based on machine vision

A technology of machine vision and two-dimensional positioning, applied in the direction of electrical program control, digital control, etc., to achieve the effects of improving positioning efficiency, good positioning repeatability, and improving work efficiency

Inactive Publication Date: 2008-01-09
JINAN UNIVERSITY
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Problems solved by technology

[0003] The purpose of the present invention is to provide a two-dimensional positioning device based on machine vision to overcome the shortcomings of manual tool setting

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  • Two-dimensional positioning device based on machine vision
  • Two-dimensional positioning device based on machine vision
  • Two-dimensional positioning device based on machine vision

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Embodiment Construction

[0016] As shown in Figure 1, the lens and camera are fixedly connected to the CNC machine tool, and the camera is connected to the processor through a communication interface. The positioning object features on the workpiece are selected in advance, generally using circles, right-angled edges, etc., and their digital photos are pre-stored in the processor as templates. The machine tool moves the camera to the feature of the positioning object according to the predetermined position, and the processor instructs the camera to take pictures and reads the digital pictures. The control program in the processor matches the digital photo with the template, recognizes the feature of the positioning object in the digital photo, and then uses the edge detection method to calculate the coordinates of the feature in the digital photo. The feature of the positioning object shown in Figure 2 is a circle. The edge detection method can calculate the coordinates of the center of the circle in ...

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Abstract

The invention provides a 2D locator based on machine vision, comprising: digital camera fixed on machine tool, and processor connected with the digital camera; it selects geometric characteristics on workpiece as located object characteristics, the digital camera obtains digital image of the located object characteristic and transmits the digital image to the processor, the processor adopts image template matching algorithm to recognize the located object characteristics on the workpiece and calculates coordinates of the object location characteristics in visual field of the camera by edge detection algorithm and obtains coordinates of workpiece in the machine tool. And the invention is used in digital controlled machine and can implement automatic cutter alignment to replace the course of artificial cutter alignment.

Description

technical field [0001] The invention relates to computer numerical control technology, in particular to a two-dimensional positioning device based on machine vision. Background technique [0002] Machine vision uses computer image processing technology to recognize the geometric shape of the object, and calculate the shape, size and position coordinates of the object according to the geometric characteristics of the object and the proportional relationship of the pixels. The position of the workpiece in the machine tool coordinate system needs to be determined during CNC machine tool processing. The current method is manual tool setting, which is inefficient and highly dependent on the operator's technical level and work mood. Contents of the invention [0003] The purpose of the present invention is to provide a two-dimensional positioning device based on machine vision to overcome the shortcomings of manual tool setting. [0004] The technical scheme for realizing the p...

Claims

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Application Information

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IPC IPC(8): G05B19/19
Inventor 柳宁王思华
Owner JINAN UNIVERSITY
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