CN107492782A - A kind of optical fiber laser beam shape control method based on RS232 - Google Patents
A kind of optical fiber laser beam shape control method based on RS232 Download PDFInfo
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- CN107492782A CN107492782A CN201710919819.1A CN201710919819A CN107492782A CN 107492782 A CN107492782 A CN 107492782A CN 201710919819 A CN201710919819 A CN 201710919819A CN 107492782 A CN107492782 A CN 107492782A
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- data frame
- slave computer
- optical fiber
- fiber laser
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/102—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of optical fiber laser beam shape control method based on RS232, it receives the data frame for the data containing predetermined waveform that host computer is sent by slave computer, and the default Wave data is stored in inside slave computer using array, according to the Wave data of storage, slave computer changes the level combinations of slave computer I/O interface by timer period, so as to realize the High Speed Modulation to laser output waveform.
Description
Technical field
The present invention relates to laser waveform modulation and control field, a kind of optical fiber laser wave beam based on RS232 is especially related to
Shape control method.
Background technology
Laser waveform modulation at present and control mainly have two methods of external modulation and internal modulation, and external modulation is on laser optical path
Attenuator is added, final output laser waveform is controlled by the attenuation rate of programming Control attenuator.Because external modulation is in light path
Upper introducing attenuator, can reduce energy efficiency, thus be used for the digital modulation of low-power laser.Internal modulation is swashed by controlling
The driving intensity of light device, so as to realize the control to laser output waveform.
At present, existing optical fiber laser internal modulation method mainly has two kinds：Serial communication controls and Digital I/O combination control
System.The former sends to laser and ordered, set the power output of laser, so as to control accordingly by self-defining communication protocol
Power laser output.This method can be directly controlled using PC to laser waveform, and still, serial communication time delay is big,
By this way to laser output power modulating frequency in kHz magnitudes.The latter is by controlling the logical combination control of digital I/O interface
The laser output of corresponding power is made, which is to the modulating frequency of laser output power up to more than 10MHz.It is however, general
Industrial computer and desktop computer all can not be directly controlled using this method to laser output waveform.
Based on problem above, thus this case produces.
The content of the invention
It is an object of the invention to provide a kind of optical fiber laser beam shape control method based on RS232, using this
Method can realize High Speed Modulation of the host computers such as PC and industrial computer to optical fiber laser beam shape, reach its modulating frequency
More than 10MHz.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of optical fiber laser beam shape control method based on RS232, it comprises the following steps：
Step 1, using RS232 as communication interface, the data frame of the data containing predetermined waveform is sent to bottom by host computer
Machine, and enter wait state；Wherein, slave computer uses chip microcontroller, data frame successively by starting character, address, function code,
Data, separator, verification and and end mark composition；
Step 2, slave computer receive data frame and simultaneously parsed, and to the verification in data frame and school is carried out after being parsed
Test, if there is mistake, abandon the data frame, and the acknowledgement frame of mistake is returned to host computer, host computer receives answering for mistake
Answer and jump to step 1 after frame and send out data frame again；If without mistake, correct acknowledgement frame is returned to host computer, and enter next
Step；When host computer waits more than setting time not by acknowledgement frame, jump to step 1 and resend data frame；
Function code and Wave data in step 3, slave computer extraction data frame, and Wave data is stored in slave computer
Portion, according to function code and Wave data, slave computer changes the level combinations of its digital I/O interface by timer period
Control the output waveform of optical fiber laser.
The data frame is the data encoding based on modbus, and its maximum length is 256 bytes, a high position for each byte
Preceding, low level is rear；In data frame, starting character is a byte, and address is a byte, and function code is a byte,
Data maximum length is 246 bytes, and separator is a byte, verification and be two bytes, end mark is two bytes.
For the host computer when sending data frame, each data byte in data frame increases 128 certainly.
The starting character be English character ":" ASCII character, function code 0-127, separator be English character "；”
ASCII character, verification and the integer data for two bytes composition, end mark be ASCII character " n r " combinations.
When the slave computer returns to acknowledgement frame, the data for the data frame that the data of acknowledgement frame receive for slave computer, data
The function code of frame is the function code increase by 128 for the data frame that slave computer receives.
The slave computer includes main control chip and connects the conversion chip Trs232 and isolator of main control chip, master control core
Piece connects optical fiber laser by conversion chip Trs232 connection host computers, the digital I/O interface of main control chip by isolator.
The present invention receives the data frame for the data containing predetermined waveform that host computer is sent by slave computer, and should using array
Default Wave data is stored in inside slave computer, and slave computer is realized defeated to optical fiber laser using digital I/O interface and timer
Go out the PLC technology of beam shape.Specifically, slave computer is sharp to control using the specific numeral combination of digital I/O interface output
The size of optical output power, laser output power is sexually revised using timer period, so as to control the ripple that optical fiber laser exports
Harness shape, the spilling cycle by changing timer can change the modulating frequency of wave beam, make modulating frequency reach 10MHz with
On.In addition, after the completion of each Wave data traversal, can accurately be covered up by the timer of main control chip, again time
Wave data is gone through, so as to realize the controllable laser beam output of repetition rate.
Brief description of the drawings
Fig. 1 is the workflow sketch of the present invention；
Fig. 2 is the theory diagram of the present invention；
Fig. 3 is the structured flowchart of slave computer of the present invention；
Fig. 4 is the structure chart of the data frame of the present invention；
Fig. 5 is the host computer and slave computer communication flow diagram of the present invention；
Fig. 6 is the implementation result figure of the present invention.
Embodiment
As shown in Figures 1 to 6, present invention is disclosed a kind of optical fiber laser beam shape control method based on RS232,
It receives the data frame for the data containing predetermined waveform that host computer is sent by slave computer, and uses array by the default waveform number
According to being stored in inside slave computer, according to the Wave data of storage, slave computer changes slave computer IO by timer period and connect
The level combinations of mouth, so as to realize the High Speed Modulation to laser output waveform.
The optical fiber laser beam shape control method specifically includes following steps：
Step 1, using RS232 as communication interface, the data frame of the data containing predetermined waveform is sent to bottom by host computer
Machine, and enter wait state；Wherein, slave computer uses chip microcontroller, data frame successively by starting character, address, function code,
Data, separator, verification and and end mark composition.
Above-mentioned data frame is the data encoding based on modbus, and its maximum length is 256 bytes, a high position for each byte
Preceding, low level is rear.In data frame, starting character is a byte, and address is a byte, and function code is a byte,
Data maximum length is 246 bytes, and separator is a byte, verification and be two bytes, end mark is two bytes.
Starting character be English character ":" ASCII character, function code 0-127, separator be English character "；"
ASCII character, the setting of the separator can improve the analyzing efficiency of slave computer；Verification and the integer for two byte compositions
According to improve the letter of the reliable communications between host computer and slave computer；End mark be ASCII character " n r " combination.
Data are encoded using a centesimal system, and the data area that each byte can represent is 0-99；Data more than 100 need
Introduce new byte.Each data byte is needed when sending from increasing 128, with separated data and the data field of function code,
Simplify resolving of the slave computer to data frame.Two byte representations can use such as 314, be x83 x8e.
Step 2, slave computer receive data frame and simultaneously parsed, and to the verification in data frame and school is carried out after being parsed
Test, if there is mistake, abandon the data frame, and the acknowledgement frame of mistake is returned to host computer, host computer receives answering for mistake
Answer and jump to step 1 after frame and send out data frame again；If without mistake, correct acknowledgement frame is returned to host computer, and enter next
Step；When host computer waits more than setting time not by acknowledgement frame, jump to step 1 and resend data frame.
When slave computer returns to acknowledgement frame, the data of acknowledgement frame are the data for the data frame that slave computer receives, data frame
Function code is the function code increase by 128 for the data frame that slave computer receives.
Function code and Wave data in step 3, slave computer extraction data frame, and Wave data is stored in slave computer
Portion, according to function code and Wave data, slave computer changes the level combinations of its digital I/O interface by timer period
Control the output waveform of optical fiber laser.
Slave computer includes main control chip and the conversion chip Trs232 for connecting main control chip and isolator, main control chip lead to
Conversion chip Trs232 connection host computers are crossed, to ensure the communication of host computer and slave computer, the digital I/O interface of main control chip is led to
Isolator connection optical fiber laser is crossed, to realize logic level transition and high-voltage isolation protective.Slave computer uses main control chip
Digital I/O interface and timer realize the PLC technology to optical fiber laser beamformer output shape, wherein, utilize main control chip
Digital I/O interface output specific numeral combination control the size of laser output power, utilize the timer week of main control chip
Phase sexually revises laser output power, so as to control the beam shape that optical fiber laser exports, by the spilling week for changing timer
Phase can change the modulating frequency of wave beam, modulating frequency is reached more than 10MHz.In addition, when each Wave data traversal is completed
Afterwards, it can accurately be covered up by the timer of main control chip, travel through Wave data again, so as to realize that repetition rate is controllable
Laser beam output.
It is described above, only it is the embodiment of the present invention, is not intended to limit the scope of the present invention, thus it is every
Any subtle modifications, equivalent variations and modifications that technical spirit according to the present invention is made to above example, still fall within this
In the range of inventive technique scheme.
Claims (6)
- A kind of 1. optical fiber laser beam shape control method based on RS232, it is characterised in that：Comprise the following steps：Step 1, using RS232 as communication interface, the data frame of the data containing predetermined waveform is sent to slave computer by host computer, and Into wait state；Wherein, slave computer uses chip microcontroller, data frame successively by starting character, address, function code, data, Separator, verification and and end mark composition；Step 2, slave computer receive data frame and simultaneously parsed, and to the verification in data frame and are verified after being parsed, if There is mistake, then abandon the data frame, and the acknowledgement frame of mistake is returned to host computer, after host computer receives the acknowledgement frame of mistake Jump to step 1 and send out data frame again；If without mistake, correct acknowledgement frame is returned to host computer, and enter next step；When When host computer waits more than setting time not by acknowledgement frame, jump to step 1 and resend data frame；Function code and Wave data in step 3, slave computer extraction data frame, and Wave data is stored in inside slave computer, According to function code and Wave data, slave computer changes the level combinations control of its digital I/O interface by timer period The output waveform of optical fiber laser.
- 2. a kind of optical fiber laser beam shape control method based on RS232 according to claim 1, its feature exist In：The data frame is the data encoding based on modbus, and its maximum length is 256 bytes, each byte it is high-order preceding, Low level is rear；In data frame, starting character is a byte, and address is a byte, and function code is a byte, and data are most Long length is 246 bytes, and separator is a byte, verification and be two bytes, end mark is two bytes.
- 3. a kind of optical fiber laser beam shape control method based on RS232 according to claim 2, its feature exist In：For the host computer when sending data frame, each data byte in data frame increases 128 certainly.
- 4. a kind of optical fiber laser beam shape control method based on RS232 according to claim 2, its feature exist In：The starting character be English character ":" ASCII character, function code 0-127, separator be English character "；" ASCII character, verification and the integer data for two bytes composition, end mark be ASCII character " n r " combinations.
- 5. a kind of optical fiber laser beam shape control method based on RS232 according to claim 1, its feature exist In：When the slave computer returns to acknowledgement frame, the data for the data frame that the data of acknowledgement frame receive for slave computer, the work(of data frame Energy code is the function code increase by 128 for the data frame that slave computer receives.
- 6. a kind of optical fiber laser beam shape control method based on RS232 according to claim 1, its feature exist In：The slave computer includes main control chip and the conversion chip Trs232 for connecting main control chip and isolator, main control chip lead to Conversion chip Trs232 connection host computers are crossed, the digital I/O interface of main control chip connects optical fiber laser by isolator.
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| CN201710919819.1A CN107492782A (en) | 2017-09-30 | 2017-09-30 | A kind of optical fiber laser beam shape control method based on RS232 |
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| CN201710919819.1A CN107492782A (en) | 2017-09-30 | 2017-09-30 | A kind of optical fiber laser beam shape control method based on RS232 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620727A (en) * | 2018-04-28 | 2018-10-09 | 深圳市创鑫激光股份有限公司 | Working method, quasi-continuous laser, laser cutting and the welding system of laser |
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| US20070053391A1 (en) * | 2003-06-03 | 2007-03-08 | Ram Oron | Laser pulse generator |
| CN102158122A (en) * | 2010-12-30 | 2011-08-17 | 天津大学 | Generating method of four-channel piezoelectric ceramic drive voltage and drive power supply |
| CN105573958A (en) * | 2016-01-12 | 2016-05-11 | 西北工业大学 | Reliable data interaction method based on RS-422 serial bus technique |
| CN106441806A (en) * | 2016-08-31 | 2017-02-22 | 中国人民解放军国防科学技术大学 | Semiconductor laser degradation testing and service life prediction experimental platform |
-
2017
- 2017-09-30 CN CN201710919819.1A patent/CN107492782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070053391A1 (en) * | 2003-06-03 | 2007-03-08 | Ram Oron | Laser pulse generator |
| CN102158122A (en) * | 2010-12-30 | 2011-08-17 | 天津大学 | Generating method of four-channel piezoelectric ceramic drive voltage and drive power supply |
| CN105573958A (en) * | 2016-01-12 | 2016-05-11 | 西北工业大学 | Reliable data interaction method based on RS-422 serial bus technique |
| CN106441806A (en) * | 2016-08-31 | 2017-02-22 | 中国人民解放军国防科学技术大学 | Semiconductor laser degradation testing and service life prediction experimental platform |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108620727A (en) * | 2018-04-28 | 2018-10-09 | 深圳市创鑫激光股份有限公司 | Working method, quasi-continuous laser, laser cutting and the welding system of laser |
| WO2019206339A1 (en) * | 2018-04-28 | 2019-10-31 | 深圳市创鑫激光股份有限公司 | Laser operating method, quasi continuous wave laser, and laser cutting and welding system |
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Application publication date: 20171219 |
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