CN108227595B - Laser pulse synchronous control method and system - Google Patents
Laser pulse synchronous control method and system Download PDFInfo
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- CN108227595B CN108227595B CN201810173634.5A CN201810173634A CN108227595B CN 108227595 B CN108227595 B CN 108227595B CN 201810173634 A CN201810173634 A CN 201810173634A CN 108227595 B CN108227595 B CN 108227595B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 12
- 230000001934 delay Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000010355 oscillation Effects 0.000 description 1
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- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention provides a laser pulse synchronous control method and a system, wherein the system comprises a control board, a singlechip, a power supply interface, a PSO control signal input port, a SYNC synchronous signal input port, a GATE signal output port and an RS232 communication port are arranged on the control board, the power supply interface is used for being connected with a power supply module, the PSO control signal input port is used for being connected with a differential PSO signal output port of a linear motor controller, the SYNC synchronous signal input port is used for being connected with a synchronous signal output port of a laser, the GATE signal output port is used for being connected with a laser control port, and the RS232 communication port is used for being connected with a PC (personal computer) for parameter adjustment and control. The invention can ensure that the pulse with the determined number is output, the control is accurate and quick, the system is small in size, easy to install and flexible to use, and the invention can be suitable for various ultrafast lasers.
Description
Technical Field
The invention relates to the field of laser control, in particular to a laser pulse synchronous control method and system.
Background
The existing laser pulse synchronous control method mainly comprises the following two steps:
1. in order to strike a point in a curve at a constant pitch, a PSO (Position Synchronized Output) mode, i.e., a position synchronization mode, is often used in glass and sapphire cutting. The linear motor controller tracks the position, and when the linear motor controller reaches a target position, a PSO signal is sent out to enable the laser to emit light. The time intervals of these signals are not certain because of the acceleration and deceleration of the motor.
2. Referring to fig. 1, the existing laser generally controls the light emitting time by the time length of the light emitting signal (GATE signal), and simultaneously, a synchronization signal (SYNC signal) is generated by determining the delay (t 1) before each laser pulse, when the GATE signal wraps a plurality of SYNC signals, the laser outputs the same number of pulses, and the control mode has no problem when the GATE signal time is long (such as continuous light emitting ablation of the laser). When the number of single-digit pulses needs to be precisely controlled, the GATE signal width can sensitively influence the number of light-emitting pulses, as shown in fig. 2, two conditions can occur when a GATE signal with a laser oscillation period length is set, the first GATE signal in fig. 2 triggers a pulse, and the second GATE signal outputs two pulses or a missing pulse (related to a laser), so that the processing quality can be seriously influenced and even the processing fails.
In order to accurately control the laser pulse, that is, to accurately output one or several laser pulses after receiving the light emitting signal (PSO signal), it is necessary to output a GATE signal of an accurate width at an accurate position after receiving the PSO signal. Therefore, it is necessary to design a control system specifically for precisely controlling the laser pulse output.
Disclosure of Invention
The invention aims to provide a laser pulse synchronous control method and a system, which are used for solving the problem that the existing laser pulse synchronous control method cannot accurately control the number of pulses.
The invention is realized in the following way:
in one aspect, the invention provides a laser pulse synchronization control method, which comprises the following steps:
the control board receives SYNC signals output by the laser and PSO signals output by the linear motor controller in real time;
after receiving the PSO signal, the control board waits for a first SYNC signal, delays time t after receiving the rising edge of the SYNC signal, outputs a GATE signal after delay, detects the SYNC signal to count at the same time, delays time t after reaching the set pulse number, and closes the GATE signal.
Further, the end time of the delay time t is at a time between two SYNC signals.
On the other hand, the invention also provides a laser pulse synchronous control system, which comprises a control board, wherein a singlechip is arranged on the control board, a power supply interface, a PSO control signal input port, a SYNC synchronous signal input port, a GATE signal output port and an RS232 communication port which are electrically connected with the singlechip are also arranged on the control board, the power supply interface is used for being connected with a power supply module, the PSO control signal input port is used for being connected with a differential PSO signal output port of a linear motor controller, the SYNC synchronous signal input port is used for being connected with a synchronous signal output port of a laser, the GATE signal output port is used for being connected with a laser control port, and the RS232 communication port is used for being connected with a PC for parameter adjustment and control.
Further, a 74HC74D trigger is further arranged on the control board, and the 74HC74D trigger is connected between the singlechip and the SYNC synchronous signal input port and is used for turning over an output signal after receiving the SYNC signal and transmitting the widened signal to the singlechip for processing.
Further, a max232 chip is further arranged on the control board, and the max232 chip is connected between the singlechip and the RS232 communication port.
Furthermore, a MAX490 chip is further arranged on the control board, and the MAX490 chip is connected between the singlechip and the PSO control signal input port and is used for converting PSO signals into single-ended signals and then outputting the single-ended signals to the singlechip for processing.
Further, an AS1117M3 chip is further arranged on the control board, and the AS1117M3 chip is connected with the singlechip.
Compared with the prior art, the invention has the following beneficial effects:
the laser pulse synchronous control method and the system provided by the invention can ensure that the GATE signal accurately envelopes the SYNC signals with the determined number so as to output the pulses with the determined number; the control board controls the number of light output through the self synchronous signal of the laser, and the control is accurate and quick; the system has small volume, easy installation and small occupied space; the system is provided with a plurality of ports, is convenient to connect to each device and is flexible to use; the system can conveniently change control parameters through a PC connected with a serial port, and can be suitable for various ultrafast lasers.
Drawings
FIG. 1 is a prior art timing diagram of a laser pulse synchronization control;
FIG. 2 is a timing diagram of a prior art laser pulse synchronization control;
fig. 3 is a timing chart of a laser pulse synchronization control method according to the present embodiment;
fig. 4 is a schematic diagram of a laser pulse synchronization control system according to the present embodiment;
fig. 5 is a schematic circuit diagram of a part of a laser pulse synchronization control system according to the present embodiment;
fig. 6 is a schematic circuit diagram of a laser pulse synchronization control system according to the embodiment
Fig. 7 is a schematic circuit diagram of a laser pulse synchronization control system according to the embodiment
Fig. 8 is a schematic circuit diagram of a laser pulse synchronization control system according to the embodiment
Fig. 9 is a schematic circuit diagram of a portion of a laser pulse synchronization control system according to the present embodiment.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 3, an embodiment of the present invention provides a method for controlling pulse synchronization of a laser, including the following steps:
the control board receives SYNC signals (synchronous signals) output by the laser and PSO signals (position synchronous output signals) output by the linear motor controller in real time;
after receiving the PSO signal, the control board waits for the first SYNC signal, delays time t after receiving the rising edge of the SYNC signal, outputs a GATE signal (light-emitting signal) after the delay is finished, simultaneously detects the SYNC signal for counting, delays time t after reaching the set pulse number, and closes the GATE signal.
The delay time t is different according to different lasers, and can be set to be the time when the ending time of the delay time t is between two SYNC signals so as to avoid the occurrence of pulses with uncertain numbers.
The control method can ensure that the GATE signal accurately envelopes the SYNC signals with the determined number so as to output the pulses with the determined number, thereby achieving the purpose of outputting the accurate pulses at the determined position. For example, two pulses need to be output, as shown in fig. 3, no matter what the position relationship between the PSO signal and the SYNC signal is, it is always ensured that the output GATE signal completely encapsulates the two SYNC signals, so as to output two pulses.
As shown in fig. 4 and fig. 5, the embodiment of the present invention further provides a laser pulse synchronization control system, for implementing the control method, where the system includes a control board, a single chip microcomputer 1 is disposed on the control board, and a power supply interface 1, a PSO control signal input port 7, a SYNC synchronization signal input port 9, a GATE signal output port 10, and an RS232 communication port 4 that are electrically connected to the single chip microcomputer 1 are further disposed on the control board; the power supply interface 1 is used for connecting a power supply module, in particular a 5V power supply interface, and can be connected to the 5V power supply module in the cabinet; the PSO control signal input port 7 is used for being connected with a differential PSO signal output port of the linear motor controller; the SYNC synchronizing signal input port 9 is used for connecting a synchronizing signal output port of a laser, and the synchronizing signal is from a laser head or a control box of the laser according to different lasers; the GATE signal output port is used for connecting with a laser control port, and a BNC port or an SMA port is used according to different lasers; the RS232 communication port 4 is used for being connected with a PC for parameter adjustment and control, and serial port software is used for setting forth adjustment and control. The singlechip receives the SYNC signal output by the laser and the PSO signal output by the linear motor controller in real time, waits for a first SYNC signal after receiving the PSO signal, delays time t after receiving the rising edge of the SYNC signal, outputs a GATE signal after delay, detects the SYNC signal to count at the same time, delays time t again after reaching the set pulse number, and closes the GATE signal. The delay time t is different according to different lasers, and can be set to be the time when the ending time of the delay time t is between two SYNC signals so as to avoid the occurrence of pulses with uncertain numbers.
The control system can realize that the GATE signal accurately envelopes the SYNC signals with the determined number so as to output the pulses with the determined number; the control board controls the number of light output through the SYNC synchronous signal of the laser, and the control is accurate and quick; the system has small volume, easy installation and small occupied space; the system is provided with a plurality of ports, is convenient to connect to each device and is flexible to use; the system can conveniently change control parameters through a PC connected with a serial port, and can be suitable for various ultrafast lasers.
As shown in fig. 6, as a preferred scheme of this embodiment, the control board is further provided with a 74HC74D trigger 8, where the 74HC74D trigger 8 is connected between the singlechip 1 and the SYNC signal input port 9, and is used to turn over an output signal after receiving a SYNC signal, and then transmit the widened signal to the singlechip 1 for processing, so as to avoid the problem that the width of SYNC signals of some lasers is narrower and the singlechip 1 cannot grasp.
As shown in fig. 8, as a preferred scheme of the embodiment, a max232 chip 3 is further provided on the control board, the max232 chip 3 is connected between the single-chip microcomputer 1 and the RS232 communication port 4, and the max232 chip 3 is used for performing level conversion to realize serial communication between the single-chip microcomputer 1 and the PC, so as to set control signals such as delay time and pulse number with different requirements.
As shown in fig. 7, in order to reduce distortion in the signal transmission process, the actually used PSO signal is a differential signal, and as a preferred scheme of this embodiment, a MAX490 chip 6 is further provided on the control board, where the MAX490 chip 6 is connected between the single-chip microcomputer 1 and the PSO control signal input port 7, and is used to convert the PSO signal into a single-ended signal, and then output the single-ended signal to the single-chip microcomputer 1 for processing.
AS shown in fig. 9, AS a preferred solution of this embodiment, the control board is further provided with an AS1117M3 chip 5, and the AS1117M3 chip 5 is connected to the single chip microcomputer 1, so AS to perform voltage stabilization, protect a circuit, and improve stability of the pulse synchronization control system.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The laser pulse synchronous control method is characterized by comprising the following steps of:
the control board receives SYNC signals output by the laser and PSO signals output by the linear motor controller in real time;
after receiving the PSO signal, the control board waits for a first SYNC signal, delays time t after receiving the rising edge of the SYNC signal, outputs a GATE signal after delay, detects the SYNC signal to count at the same time, delays time t after reaching the set pulse number, and closes the GATE signal.
2. The laser pulse synchronization control method according to claim 1, wherein: the end of this delay time t is at a time between the two SYNC signals.
3. The utility model provides a laser pulse synchronization control system, includes control panel, its characterized in that: the control board is provided with a singlechip, and is also provided with a power supply interface, a PSO control signal input port, a SYNC synchronous signal input port, a GATE signal output port and an RS232 communication port which are electrically connected with the singlechip, wherein the power supply interface is used for being connected with a power supply module, the PSO control signal input port is used for being connected with a differential PSO signal output port of a linear motor controller, the SYNC synchronous signal input port is used for being connected with a synchronous signal output port of a laser, the GATE signal output port is used for being connected with a laser control port, and the RS232 communication port is used for being connected with a PC for parameter adjustment and control;
the singlechip is used for receiving the SYNC signal output by the laser and the PSO signal output by the linear motor controller in real time, waiting for a first SYNC signal after receiving the PSO signal, delaying time t after receiving the rising edge of the SYNC signal, outputting a GATE signal after the delay is finished, detecting the SYNC signal to count at the same time, and stopping the GATE signal after the set pulse number is reached, delaying time t again.
4. A laser pulse synchronization control system as defined in claim 3, wherein: and the control board is also provided with a 74HC74D trigger, and the 74HC74D trigger is connected between the singlechip and the SYNC synchronous signal input port and is used for turning over an output signal after receiving the SYNC signal and transmitting the widened signal to the singlechip for processing.
5. A laser pulse synchronization control system as defined in claim 3, wherein: and a max232 chip is also arranged on the control board, and the max232 chip is connected between the singlechip and the RS232 communication port.
6. A laser pulse synchronization control system as defined in claim 3, wherein: and the control board is also provided with a MAX490 chip, and the MAX490 chip is connected between the singlechip and the PSO control signal input port and is used for converting PSO signals into single-ended signals and then outputting the single-ended signals to the singlechip for processing.
7. A laser pulse synchronization control system as defined in claim 3, wherein: the control board is also provided with an AS1117M3 chip, and the AS1117M3 chip is connected with the singlechip.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110286613B (en) * | 2019-05-13 | 2022-02-01 | 大族激光科技产业集团股份有限公司 | Double-shaft laser control system |
| CN110265861B (en) * | 2019-06-20 | 2020-07-07 | 北京盛镭科技有限公司 | Method and system for controlling laser pulse output |
| CN110421247B (en) * | 2019-06-25 | 2021-02-12 | 上海柏楚电子科技股份有限公司 | Ultrafast laser equidistant dotting processing method for thin and brittle material |
| CN111610740B (en) * | 2020-06-03 | 2021-07-02 | 上海柏楚数控科技有限公司 | Processing control method and system, first and second control devices, and storage medium |
| CN112767673B (en) * | 2020-12-29 | 2023-02-28 | 中电科能源有限公司 | Distributed control system for high-power digital pulse power supply |
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