WO2013120248A1

WO2013120248A1 - Pulse laser and marking system using same

Info

Publication number: WO2013120248A1
Application number: PCT/CN2012/071109
Authority: WO
Inventors: 刘猛; 成学平; 刘明; 赵崇光; 刘健; 黄治家
Original assignee: 深圳市杰普特电子技术有限公司
Priority date: 2012-02-14
Filing date: 2012-02-14
Publication date: 2013-08-22
Also published as: CN102892585B; CN102892585A

Abstract

A pulse laser (20) and marking system using same, the pulse laser (20) comprises a laser generating module (22), a graphics interface module (23) for communicating with a graphics editing device (10), a oscillating mirror interface module (24) for communicating with a oscillating mirror device (30), and a control module (21) for receiving and analyzing the graphics editing data from the graphics editing device (10), and then generating laser control signal and the oscillating mirror control signal according to the analyzing result. The laser control signal is sent to the laser generating module (22) to generate the laser signal, the oscillating mirror control signal is sent to the oscillating mirror device (30) to execute the oscillating mirror action. The present invention integrates the function of laser marking control into the pulse laser (20), accordingly achieves the aforementioned function and the control function of the pulse laser (20) in the same computing unit, sequentially the transmitting time of the control signal is shortened from millisecond to microsecond, and the costs are reduced as well; besides, the cabling length between each element is shortened extremely, which improves the stability, reliability and the capability of anti-interference of the system.

Description

Pulse laser and pulse laser marking system

Technical field

The present invention relates to the field of laser equipment, and more particularly to a pulsed laser and pulsed laser marking system.

Background technique

Please refer to FIG. 1 , which is an architectural diagram of a prior pulse laser marking system. As shown in FIG. 1, the pulse laser marking system includes a graphic editing device 10, a laser marking control card 90, a pulse laser 20, a galvanometer device 30, a power supply device 40, and a foot switch 50. The graphic editing device 10 can be implemented by a PC for receiving a user marking signal for graphic editing and generating graphic editing data. The laser marking control card 90 generally has a USB interface for data exchange with a PC as the graphics editing device 10. The laser marking control card 90 also has a DB25 or SCSI interface for communication with the pulsed laser 20. At the same time, the laser marking control card 90 also has a DB25 or DB37 interface for communication with the galvanometer device 30. The laser marking control card 90 is responsible for real-time processing of the graphic editing data from the graphic editing device 10, and at the same time, generating a laser control signal to control the pulse laser 20 according to the analysis result of the data, and generating a galvanometer control signal to the galvanometer device. 30 controls the galvanometer action. The pulse laser 20 is powered by the external power supply unit 40, and the foot switch 50 controls the on/off of the power supply of the external power supply unit 40, thereby controlling whether the current product is marked by human operation. The laser marking control card 90 generally performs data processing through a DSP or an FPGA, and has one to several pieces of memory for data storage.

Please refer to FIG. 2, which is a schematic block diagram of a prior pulse laser. As shown in FIG. 2, the pulsed laser 20 has a control module 21, a laser generating module 22, and a marking card interface module 29. The marking card interface module 29 is used for communication with the laser marking control card 90, and the control module 21 controls the marking card interface module 29 to directly receive the laser control signal from the laser marking control card 90, and is controlled according to the laser control signal. The laser generation module 22 generates a laser signal. The laser generating module 22 includes a seed source unit 221, a pre-amplifying unit 222, and a power amplifying unit 223. The laser signal generated by the seed source unit 221 is subjected to preliminary amplification by the pre-amplification unit 222, and then amplified by the power amplification unit 223 and output.

As described above, the current pulse laser marking system needs to generate a laser control signal through the laser marking control card 90 and then transmit it to the pulse laser 20, so that the transmission speed of the control signal is slow, as shown in FIG. 3, wherein the A curve is a frequency indication. When the signal and the frequency indication signal are converted from a high frequency to a low frequency, the surface PC, that is, the graphic editing device 10 receives the user marking signal and is set to start marking, and the rising of the curve B indicates that the pulse laser 20 starts to receive the laser control signal. time. As shown in FIG. 3, the reception time of the laser control signal is delayed by several milliseconds compared with the time when the marking of the laser editing signal is set, so that the operation of the pulse laser marking system is stable, the anti-interference ability is low, and the reliability is poor. The problem. On the other hand, the laser marking control card 90 and the pulse laser 20 are separately implemented by respective hardware, resulting in complicated hardware and excessive routing.

Summary of the invention

The technical problem to be solved by the present invention is to provide a pulse laser integrated with the marking control function and a marking system thereof, aiming at the defects of the complicated hardware and the slow signal transmission of the existing pulse laser marking system.

The technical solution adopted by the present invention to solve the technical problem is to construct a pulse laser marking system, comprising: a graphic editing device for receiving a user marking signal for graphic editing and generating graphic editing data; and a pulse laser for receiving The graphic editing data is analyzed, and a laser control signal and a galvanometer control signal are generated according to the analysis result, wherein the laser control signal is sent to the built-in laser generating module to control generation of the laser signal; and the galvanometer device is configured to be controlled according to the galvanometer The signal performs a galvanometer action.

In the pulse laser marking system according to the present invention, the pulse laser further includes: a graphic interface module in communication with the graphic editing device, a galvanometer interface module in communication with the galvanometer device, and a control module and a laser generating module; the control module is configured to receive graphic editing data generated by the graphic editing device, analyze the graphic editing data, and generate a laser control signal and a galvanometer control signal according to the analysis result, wherein the laser control signal is sent The laser generating module controls the laser signal generated by the laser generating module, and the galvanometer control signal is sent to the galvanometer device through the galvanometer interface module to perform a galvanometer motion.

In the pulse laser marking system according to the present invention, the laser generating module includes a seed source unit, a pre-amplifying unit, and a power amplifying unit controlled by the control module, and the laser signal generated by the seed source unit is prevented After the large unit is initially amplified, it is amplified by the power amplifying unit and output.

In the pulse laser marking system according to the present invention, the control module further includes: a marking image control unit for analyzing the graphic editing data; and a laser control unit for performing the marking image according to the marking An analysis result of the control unit generates a laser control signal sent to the laser generating module to control generation of the laser signal; and a galvanometer control unit configured to generate a galvanometer control signal according to the analysis result of the marking image control unit, and send the The galvanometer device controls the action of the galvanometer.

In the pulse laser marking system according to the present invention, the pulse laser marking system further includes an external power supply device and a foot switch, the pulse laser is powered by an external power supply device, and the external switch is controlled by a foot switch The power supply unit is powered on and off.

The present invention also provides a pulsed laser comprising a laser generating module, the pulsed fiber laser further comprising:

a graphic interface module for communicating with the graphic editing device;

a galvanometer interface module for communicating with the galvanometer device;

a control module, configured to receive graphic editing data through the graphic interface module, analyze the graphic editing data, and generate a laser control signal and a galvanometer control signal according to the analysis result, wherein the laser control signal is sent to the laser generating module Controlling the generation of the laser signal, the galvanometer control signal is sent to the galvanometer device through the galvanometer interface module to perform the galvanometer action.

In the pulsed laser according to the present invention, the laser generating module includes a seed source unit, a pre-amplifying unit, and a power amplifying unit controlled by the control module, and the laser signal generated by the seed source unit is subjected to a large-scale prevention unit. After initial amplification, the power amplification unit is amplified and output.

In the pulsed laser according to the present invention, the control module further includes: a marking image control unit for analyzing the graphic editing data; and a laser control unit for controlling the unit according to the marking image The analysis result generates a laser control signal sent to the laser generating module to control the generation of the laser signal; and a galvanometer control unit, configured to generate a galvanometer control signal according to the analysis result of the marking image control unit, and send the galvanometer control signal to the galvanometer device Control the action of the galvanometer.

In the pulsed laser according to the present invention, the pulsed laser is powered by an external power supply device, and the on/off of the power supply of the external power supply device is controlled by the foot switch.

The pulse laser and the corresponding pulse laser marking system embodying the invention have the following beneficial effects: the invention integrates the set of pulse lasers by two sets of control functions in hardware by integrating the function of laser marking control in the pulse laser. The hardware makes the pulse laser marking system greatly simplified, which facilitates system assembly and reduces the cost. As the system is simplified, the traces between the main components are greatly shortened, making the stability, reliability and anti-interference ability of the whole system. It is greatly enhanced; at the same time, since the laser marking control function and the control function of the pulse laser are implemented in the same arithmetic unit, the transmission time of the control signal is shortened from the millisecond level to the microsecond level.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is an architectural diagram of a conventional pulse laser marking system;

2 is a schematic block diagram of a conventional pulse laser;

3 is a diagram showing a relationship between signal time differences of a conventional pulse laser marking system;

4 is a schematic block diagram of a preferred embodiment of a pulsed laser marking system in accordance with the present invention;

Figure 5 is a schematic block diagram of a preferred embodiment of a pulsed laser in accordance with the present invention;

Figure 6 is a detailed block diagram of a control module in a preferred embodiment of a pulsed laser in accordance with the present invention;

Figure 7 is a graph showing the relationship of signal time differences of a pulsed laser marking system in accordance with the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Please refer to FIG. 4, which is a schematic block diagram of a preferred embodiment of a pulsed laser marking system in accordance with the present invention. As shown in FIG. 4, the pulse laser marking system provided by this embodiment includes at least: a graphic editing device 10, a pulse laser 20, and a galvanometer device 30. The function of the marking control is integrated into the pulsed laser 20 in the pulsed laser marking system of the present invention.

The graphic editing device 10 is configured to receive a user marking signal for graphic editing, and generate graphic editing data. The pulse laser 20 is configured to receive and analyze the graphic editing data generated by the graphic editing device 10, and generate a laser control signal and a galvanometer control signal according to the analysis result, wherein the laser control signal is sent to the laser generating module built in the pulse laser 20 to control the generation of the laser signal. . The galvanometer device 30 is configured to perform a galvanometer motion based on the galvanometer control signal.

The average output power of the pulsed laser 20 can be 5W, 10W, 15W, 20W, 25W, 30W, 35W, 40W, 45W, 50W, and the like. The energy of the pulse varies from 0.1 mJ to several mJ. The frequency of the pulses ranges from 100 Hz to several megahertz.

By combining the functions of the pulsed laser 20 and the prior art laser marking control card 90, the two sets of control functions can share the hardware of the pulsed laser 20 in hardware, so that the pulse laser marking system is greatly simplified. Convenient system assembly and reduced costs. As the system is simplified, the traces between the main components are greatly shortened, which greatly enhances the stability, reliability and anti-interference ability of the entire system.

The pulse laser marking system may further include an external power supply device 40 and a foot switch 50. The pulse laser 20 is powered by the external power supply device 40, and the foot switch 50 controls the power supply of the external power supply device 40 to be turned on and off. Controls whether the current product is marked. The external power supply unit 40 can adopt 24V DC or 220V AC power supply.

Please refer to FIG. 5, which is a schematic block diagram of a preferred embodiment of a pulsed laser in accordance with the present invention. As shown in FIG. 5, the present invention also provides a pulsed laser 20, which further includes a graphic interface module 23, a galvanometer interface module 24, a control module 21, and a laser generating module 22. The graphics interface module 23 is configured to communicate with the graphics editing apparatus 10 of FIG. 4 to receive graphics editing data generated by the graphics editing apparatus. The graphics interface module 23 can be implemented by using a USB or other communication format chip having high-speed communication capability. For example, the graphic editing apparatus 10 can be directly transmitted to the pulse laser 20 through a USB connection line, or can be transmitted by outputting data to a USB disk and then inserting information of the USB disk into the USB interface of the pulse laser 20.

The galvanometer interface module 24 is for communicating with the galvanometer device 30 of FIG. The control module 21 has a function of marking control, and can receive graphic editing data from the graphic editing device 10 through the graphic interface module 23, analyze the graphic editing data, and generate a laser control signal and a galvanometer control signal based on the analysis result. The laser control signal is sent to the laser generating module 22 to control the generation of the laser signal. The galvanometer control signal is sent through the galvanometer interface module 24 to the galvanometer device 30 of Fig. 4 to control the galvanometer. The control module 21 of the pulsed laser can be implemented by a large-scale integrated chip such as a DSP or an FPGA.

The laser generating module 22 may further include a seed source unit 221, a pre-amplifying unit 222, and a power amplifying unit 223. The laser signal generated by the seed source unit 221 is subjected to preliminary amplification by the pre-amplification unit 222, and then amplified by the power amplification unit 223 and output. The various units of the laser generation module 22 can be implemented using MOS tubes with high current and fast response.

Please refer to FIG. 6, which is a detailed block diagram of a control module in a preferred embodiment of a pulsed laser in accordance with the present invention. As shown in FIG. 6, the control module 21 may further include: a marking image control unit 211, a galvanometer control unit 212, and a laser control unit 213. The marking image control unit 211 is configured to analyze the graphic editing data received from the graphic editing device 10. The laser control unit 213 is configured to generate a laser control signal according to the analysis result of the marking image control unit 211 and send it to the laser generating module 22 to control the generation of the laser signal. The galvanometer control unit 212 is configured to generate an operation of transmitting the galvanometer control signal to the galvanometer device 30 to control the galvanometer according to the analysis result of the marking image control unit 211. Since the marking image control unit 211, the galvanometer control unit 212 and the laser control unit 213 are realized in the same operation unit, the relevant switches and positions of the laser generating module and the galvanometer are directly controlled, and then the transmission time of the control signal is controlled by The millisecond level is reduced to the microsecond level.

Please refer to FIG. 7, which is a relationship diagram of signal time difference of the pulse laser marking system according to the present invention. As shown in FIG. 7, wherein the A curve is a frequency indication signal, when the frequency indication signal is converted from a high frequency to a low frequency, the surface PC, that is, the graphic editing device 10 receives the user marking signal and is set to start marking, and the curve B' The rise indicates the time at which the pulsed laser 20 begins to receive the laser control signal. The rise of curve B is the time at which the pulsed laser 20 of the prior art begins to receive the laser control signal. As shown in FIG. 7, by the improvement of the present invention, the delay between the reception time of the laser control signal and the time at which the marking operation is started on the graphic editing apparatus 10 is reduced from the order of several milliseconds to several tens of milliseconds. On the order of ten microseconds, it greatly improves production efficiency.

The invention removes the existing pulse laser control card interface module of the pulse laser, such as DB25 or SCSI interface, and adds a graphic interface module for communicating with the graphic editing device, for example, a graphic data transmission interface connected with the PC, type Can be USB, 1394, DB25 or any other form of interface. The pulse laser also adds a galvanometer interface module that communicates with a galvanometer device such as a digital galvanometer on the hardware interface, such as a DB25 interface to control the galvanometer. In addition, the control module integrates the functions of the marking control card and controls other modules.

The laser signal generated by the laser generating module of the pulsed laser passes through the isolator, and the collimator performs beam output. Pulsed lasers can be either MOPA or Q-Switch in the optical path, using a one- or two-stage amplification system. When the MOPA structure is adopted, the seed source unit of the pulse laser is driven by a seed source using a driving circuit having a narrow pulse and a large current driving capability. When the Q-Switch structure is used, the acousto-optic switch is driven by the RF drive circuit, similar to the seed source unit. The primary or secondary amplification system can use active fiber to amplify the signal light by switching the pump light and stimulated emission. The two-stage amplification system, such as the prevention large unit and the power amplification unit, is implemented by a driving circuit having a large current and high-speed modulation capability, and the isolators are placed between the two stages to isolate the reflected light.

In addition, the present invention can also adopt special protection circuits, such as signal isolation using optocouplers, filtering of spike signals by Schottky diodes, etc., effectively filtering out electromagnetic interference; using less power consumption and more processing power. The high-performance chip acts as the processor, and the large-area copper-clad method accelerates the heat dissipation, achieving 7*24 hours of continuous marking; at the same time, the whole machine can adopt the all-metal structure casing to realize the internal device fixing and protection. And shielding of internal and external signals.

The present invention has been described in terms of a particular embodiment, and it will be understood by those skilled in the art that various changes and equivalents can be made without departing from the scope of the invention. In addition, many modifications may be made to the invention without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the scope of the claims.

Claims

A pulsed laser marking system, comprising:

a graphic editing device, configured to receive a user marking signal for graphic editing, and generate graphic editing data;

a pulse laser for receiving the graphic editing data for analysis, and generating a laser control signal and a galvanometer control signal according to the analysis result, wherein the laser control signal is sent to the built-in laser generating module to control generation of the laser signal;

A galvanometer device is configured to perform a galvanometer motion according to the galvanometer control signal.

2. The pulsed laser marking system of claim 1 wherein said pulsed laser further comprises: a graphical interface module in communication with said graphics editing device, and a galvanometer interface module in communication with said galvanometric device And a control module and a laser generating module; the control module is configured to receive graphic editing data generated by the graphic editing device, analyze the graphic editing data, and generate a laser control signal and a galvanometer control signal according to the analysis result, The laser control signal is sent to the laser generating module to control the generation of the laser signal, and the galvanometer control signal is sent to the galvanometer device through the galvanometer interface module to perform the galvanometer action.

The pulsed laser marking system according to claim 1 or 2, wherein the laser generating module comprises a seed source unit, a pre-amplifying unit and a power amplifying unit controlled by the control module, the seed source The laser signal generated by the unit is initially amplified by the prevention large unit, and then amplified by the power amplification unit and output.

4. The pulsed laser marking system of claim 2, wherein the control module comprises:

a marking image control unit, configured to analyze the graphic editing data;

a laser control unit, configured to generate a laser control signal according to the analysis result of the marking image control unit, and send the laser signal to the laser generating module to control the generation of the laser signal;

The galvanometer control unit is configured to generate, according to the analysis result of the marking image control unit, an action of transmitting a galvanometer control signal to the galvanometer device to control the galvanometer.

5. The pulsed laser marking system according to claim 1, wherein the pulsed laser marking system further comprises an external power supply device and a foot switch, wherein the pulsed laser is powered by an external power supply device and is pedaled. The switch controls the on and off of the power supply of the external power supply device.

A pulsed laser, comprising a laser generating module, wherein the pulsed fiber laser further comprises:

a graphic interface module for communicating with the graphic editing device;

a galvanometer interface module for communicating with the galvanometer device;

The pulsed laser according to claim 6, wherein the laser generating module comprises a seed source unit, a pre-amplifying unit and a power amplifying unit controlled by the control module, and the laser signal generated by the seed source unit After preliminary amplification by the prevention large unit, the power amplification unit is amplified and output.

The pulsed laser according to claim 6 or 7, wherein the control module comprises:

a marking image control unit, configured to analyze the graphic editing data;

The pulsed laser according to claim 6 or 7, wherein the pulsed laser is powered by an external power supply device, and the power switch of the external power supply device is controlled by the foot switch.