High-precision visual positioning system and its positioning calibration method

Abstract

The invention discloses a high-precision visual positioning system and a positioning calibration method thereof. The visual positioning system includes a processing platform, a vibrating mirror system, a computer control system, a visual camera, and a workpiece to be measured; Extract the coordinates of the midpoint of the straight line segment of the edge, and calculate the virtual intersection point of the straight line connected by each detection point, so as to obtain the actual position coordinates of the midpoint of the edge of the workpiece. The invention can calibrate deviations of multiple workpieces at the same time, is simple to operate, does not require manual intervention, has high calibration accuracy and strong stability, and greatly improves the flexibility and operability of the visual-aided laser galvanometer scanning system in the field.

Description

technical field [0001] The invention relates to the field of laser processing positioning, in particular to a high-precision visual positioning system and a positioning calibration method thereof. Background technique [0002] Traditional laser processing generally does not have the function of detecting the position of the workpiece, and usually uses a fixture to achieve positioning, that is, manual intervention and positioning. However, it is very difficult to achieve precise positioning of fine or extremely small processing objects, and it is difficult to pick and place the processing objects. In addition, it is difficult to ensure the accuracy and consistency of the marking position in actual operation due to human factors. The positioning of the product processing by the accuracy of the fixture will directly affect the marking position accuracy of the parts, and the coordinate position of each processing object is unique; at the same time, the marking effect of the proc...

AI Technical Summary

Problems solved by technology

However, it is very difficult to achieve precise positioning of fine or extremely small processing objects, and it is difficult to pick and place the processing objects. Coupled with human factors and other factors, it is difficult to ensure the accuracy and consistency of the marking position in actual operation.

The accuracy of tooling and fixtures will directly affect the positioning of product processing, and the coordinate position of each processing object is unique; at the same time, the marking effect of processing objects below the millimeter level cannot be distinguished by naked eyes, and requires independent inspection. System to detect, and manual intervention positioning is relatively cumbersome, the degree of automation is low, and the accuracy is difficult to effectively guarantee

In the prior art, the laser device is likely to cause unnecessary damage to the processed workpiece, and it is expensive, and the general calibration method is aimed at a single galvanometer and camera, which cannot correct multiple workpiece errors at the same time, and the operation steps are relatively cumbersome, not simplified enough

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