General galvanometer and visual speed measurement-based flying marking system and control method

Abstract

The invention discloses a general galvanometer and visual speed measurement-based flying marking system and a control method. The general galvanometer and visual speed measurement-based flying marking system comprises a laser device, a laser marking control card, an upper computer, a data controller and a digital camera and a scanning galvanometer which are arranged on a conveying belt, wherein the data controller is connected with the scanning galvanometer, the laser marking control card and the digital camera; the laser marking control card is also connected with the upper computer; the data controller blocks data between the laser marking control card and the scanning galvanometer; a to-be-marked workpiece picture shot by the digital camera is processed to obtain affine transformation parameters; and the data controller corrects blocked machining data and converts the data into a digital square wave signal which is sent to the scanning galvanometer to adjust the laser device for marking. Compared with the prior art, the general galvanometer and visual speed measurement-based flying marking system has the advantages of higher generality, higher speed, higher precision and capability of reducing the production cost and improving the production efficiency; and furthermore, the production cost can be reduced, the production efficiency can be improved, and the working intensity of a worker is reduced.

Description

technical field [0001] The invention relates to the technical field of laser marking, in particular to a flying marking system and control method based on a general vibrating mirror and visual velocity measurement. Background technique [0002] Laser marking is an important application of laser processing technology, which can be used in many fields such as electronic components, electrical appliances, mobile communications, hardware products, tool accessories, precision instruments, etc. With the development of laser galvanometer scanning technology, the galvanometer reflection laser mode has become the mainstream in the field of laser marking, and its core is the laser marking control system. [0003] Flying marking means that the laser can still produce the same pattern as the static marking when the workpiece or object is in a state of rapid movement. Laser marking equipment mainly includes: (1) laser marking control card and host computer software; (2) production conve...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the above technical solution is that the real-time performance of the system is not high, so the system accuracy is not high, and it cannot be applied to marking occasions with unstable speed

At present, another new type of compensation scheme is to use hardware for compensation. This technical scheme has high precision, but it has high requirements on the attitude of the workpiece. It needs to use a template to enter the conveyor belt, and the hardware cost is relatively high.

More importantly, the hardware compensation scheme directly uses FPGA to control the scanning galvanometer itself. This solution is not feasible for ordinary scanning galvanometers, because most scanning galvanometers have only one interface and cannot operate inside.

Images