Three-axis positioning device and method based on machine vision

Abstract

The invention discloses a three-axis positioning device and method based on machine vision, and the method comprises the steps: carrying out the positioning of a PCB and a film; building a machine platform coordinate system, respectively taking a first alignment element center and a second alignment element center as origins of coordinates, and building a first coordinate system and a second coordinate system; obtaining an alignment inclined angle, and solving the difference of the first and second alignment element centers in the machine platform coordinate system in the X-axis direction as a first difference value and the difference of the first and second alignment element centers in the machine platform coordinate system in the Y-axis direction as a second difference value according to the position coordinates of the first and second alignment element centers in the machine platform coordinate system; judging whether the alignment inclined angle, the first difference value and the second difference value are within a preset error range or not: carrying out no adjustment if the alignment inclined angle, the first difference value and the second difference value are within the preset error range, or adjusting the position. According to the invention, the method achieves the positioning control based on CCD machine vision, can quickly and accurately obtain the position information, solve a problem of positioning errors in a production and manufacturing process of the PCB, and improve the alignment precision and speed.

Description

technical field [0001] The invention relates to the technical field of positioning, in particular to a three-axis positioning device and method based on machine vision. Background technique [0002] In industries with a high degree of automation, such as printed circuit boards, numerical control processing, laser processing, etc., most of them have applied automated production lines, and high-precision and efficient positioning and timing control requirements are required for key stations or processes on the production line. . For example, in the PCB industry, the exposure alignment process is controlled by high-end PCB boards such as HDI boards and multi-layer flexible boards. The electronic circuit density is high, the circuit spacing is small, and both the PCB and the exposure film will be deformed, plus the random error between the push rod mechanism. , has caused great obstacles to the precision control of vertical and horizontal alignment. Contents of the invention ...

AI Technical Summary

Problems solved by technology

For example, in the PCB industry, the exposure alignment process is controlled by high-end PCB boards such as HDI boards and multi-layer flexible boards. The electronic circuit density is high, the circuit spaci

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