CN104009385B - Laser power control method and system - Google Patents
Laser power control method and system Download PDFInfo
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- CN104009385B CN104009385B CN201410245615.0A CN201410245615A CN104009385B CN 104009385 B CN104009385 B CN 104009385B CN 201410245615 A CN201410245615 A CN 201410245615A CN 104009385 B CN104009385 B CN 104009385B
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Abstract
A kind of laser power control method, comprises the following steps：The first pulse signal is exported to laser, the laser is in pre- Warm status；After time delay t, the second pulse signal is exported to the laser, the laser starts to light；Passing through fluorescent lifetime t2Afterwards, stop exporting the second pulse signal to the laser, the laser is in pre- Warm status；Passing through preheating time t1Afterwards, stop exporting the first pulse signal to the laser；Wherein, t1=2t+t2；Therefore, during rapidoprint, only simultaneously when the first pulse signal and the second pulse signal are acted on, laser lights, and the power highest of laser now.And in only the first pulse signal, laser is only in pre- Warm status, rapidoprint will not be impacted.So as to avoid because of the not high influence processing efficiency of power, and rapidoprint is caused to process the phenomenon that edge burns charing.Further, it would be desirable to provide a kind of Laser energy attenuation system.
Description
Technical field
The present invention relates to Laser energy attenuation, more particularly to a kind of efficient, high-power laser power control method and
System.
Background technology
In current Laser energy attenuation, laser starts to light when general control method is modulation pulse output,
Laser stops luminous when modulating end-of-pulsing.Laser power in whole laser light period is very low, it is necessary to repeat one
Individual position processing, causes rapidoprint to process edge and burns charing, can not meet constantly progressive processing technology requirement.Such as accompanying drawing
Shown in 1, slow stop phase is declined comprising the Gauss light energy rate of climb slow incipient stage and energy in light period,
Time scale of the two stages shared by whole laser light period is quite big, causes laser power lowly, seriously
Processing efficiency is influenceed, causes rapidoprint to process edge and burns charing.
The content of the invention
Based on this, it is necessary to provide a kind of efficient, high-power laser power control method.
A kind of laser power control method, comprises the following steps：
The first pulse signal is exported to laser, the laser is in pre- Warm status；
After time delay t, the second pulse signal is exported to the laser, the laser starts to light；
Passing through fluorescent lifetime t2Afterwards, stop exporting the second pulse signal to the laser, be in the laser
Pre- Warm status；
Passing through preheating time t1Afterwards, stop exporting the first pulse signal to the laser；Wherein, t1=2t+t2；Institute
Frequency f, the cycle T for stating the first pulse signal and second pulse signal are identical, and pre- Warm status is that the laser gathers energy
The state of amount.
In one of the embodiments, the duty cycle, delta of first pulse signal1=t1/ T*100%.
In one of the embodiments, the duty cycle, delta of second pulse signal2=t2/ T*100%.
In one of the embodiments, the relatively described second pulse signal rising edge of first pulse signal and trailing edge
Time delay be t.
In one of the embodiments, when the laser receives the first pulse signal and the second pulse signal at the same time
It is luminous.
Above-mentioned laser power control method is preheated by the first pulse signal to laser, laser is gathered energy
Amount.Then the second pulse signal is exported to laser again so that the energy accumulation of laser reaches " snowslide " effect, i.e. laser
Start to light.And when stopping the second pulse signal of output, the energy dropoff of laser stops luminous.Therefore, in rapidoprint
During, only simultaneously when the first pulse signal and the second pulse signal are acted on, laser lights, and laser is now
Power highest, can form the material gasification process effect of " blast " formula on substrate for printed circuit board.And in only the first pulse
During signal, laser is only in pre- Warm status, and rapidoprint will not be impacted.So as to avoid because of the not high influence of power
Processing efficiency, and cause rapidoprint to process the phenomenon that edge burns charing.
Further, it would be desirable to provide efficient, the high-power Laser energy attenuation system of one kind.
A kind of Laser energy attenuation system, including industrial computer unit, Laser control unit and laser element；The laser
Control unit connects the industrial computer unit and the laser element respectively；The Laser control unit is used for the laser
Device unit exports the first pulse signal, the laser element is in pre- Warm status；The industrial computer unit is used to pass through
After time delay t, control instruction is sent to the Laser control unit, makes the Laser control unit to the laser element
In lasting t2The second pulse signal of output in time, the laser element lights；The industrial computer unit is additionally operable to passing through
Preheating time t1Afterwards, control instruction is sent to the Laser control unit, the Laser control unit is stopped to the laser
Device unit exports the first pulse signal；Wherein, t1=2t+t2；The frequency of first pulse signal and second pulse signal
F, cycle T are identical, and pre- Warm status is the state that the laser gathers strength.
In one of the embodiments, the duty cycle, delta of first pulse signal1=t1/ T*100%.
In one of the embodiments, the duty cycle, delta of second pulse signal2=t2/ T*100%.
In one of the embodiments, the relatively described second pulse signal rising edge of first pulse signal and trailing edge
Time delay be t.
In one of the embodiments, when the laser receives the first pulse signal and the second pulse signal at the same time
It is luminous.
Above-mentioned Laser energy attenuation system is preheated by the first pulse signal to laser element, makes laser element
Gather strength.Then the second pulse signal is exported to laser element again so that the energy accumulation of laser element reaches " snow
Collapsing " effect, i.e. laser element start to light.And when stopping the second pulse signal of output, the energy dropoff of laser element,
Stop luminous.Therefore, during rapidoprint, only simultaneously when the first pulse signal and the second pulse signal are acted on,
Laser element is lighted, and the power highest of laser element now, and " blast " formula can be formed on substrate for printed circuit board
Material gasification process effect., will not be to processing material and in only the first pulse signal, laser element is only in pre- Warm status
Material is impacted.So as to avoid because of the not high influence processing efficiency of power, and rapidoprint processing edge is caused to burn charing
Phenomenon.
Brief description of the drawings
Fig. 1 schemes for the pulse period of conventional laser energy control method；
Fig. 2 is the flow chart of the laser power control method of an embodiment；
Fig. 3 schemes for the pulse period of laser power control method；
Fig. 4 is the module map of Laser energy attenuation system.
Embodiment
As shown in Fig. 2 being the flow chart of laser power control method.
A kind of laser power control method, comprises the following steps：
Step S110, the first pulse signal is exported to laser, the laser is in pre- Warm status.
The duty cycle, delta of first pulse signal1=t1/ T*100%.
Step S120, after time delay t, the second pulse signal is exported to the laser, the laser is opened
Originate light.
The duty cycle, delta of second pulse signal2=t2/ T*100%.
Step S130, is passing through fluorescent lifetime t2Afterwards, stop exporting the second pulse signal to the laser, make described sharp
Light device is in pre- Warm status.
Step S140, is passing through preheating time t1Afterwards, stop exporting the first pulse signal to the laser；Wherein, t1=
2t+t2；The frequency f of first pulse signal and second pulse signal, cycle T are identical, and pre- Warm status is the laser
The state that device gathers strength.
In the present embodiment, laser sends infrared laser light beam.
Time delay t can change, time delay t and two-way impulse modulation with two-way pulse-modulated signal cycle difference
The relation of signal is fixed.
The time delay of the relatively described second pulse signal rising edge of first pulse signal and trailing edge is t.
Laser receives luminous when the first pulse signal and the second pulse signal at the same time.
Existing laser illumination mode is：It is with CO in laser2Gas for medium radio frequency laser in, CO2Gas
Belong to inert chemi-cal material, chemical property is stable, when receiving external high frequency excitation, start active, the energy of generation " snowslide " formula
Release, sends laser, lighting time interval is t11.Stop lighting at the end of high frequency pumping, it is infrared in whole light period
Laser beam power is P1。
And in the present embodiment, (the first pulse when laser receives external input signal the first pulse signal Laser-1
Signal Laser-1 is overturn as high level 1 by low level 0) do not light immediately, but in " preheating " state, i.e., a kind of wig
Light state.Now laser intra-cavity energy is constantly accumulated, and only when excitation reaches to a certain degree, internal energy, which is accumulated to, to be produced
" snowslide " effect of qualitative change formula, namely (the second pulse signal when receiving external input signal the second pulse signal Laser-2
Laser-2 is overturn as high level 1 by low level 0) light.The time of whole energy accumulation consumption is t, lighting time interval
For t2.(the second pulse signal Laser-2 is overturn by low level 1 is at the end of the second pulse signal of external input signal Laser-2
High level 0) stop lighting.Into wig light state, at the end of the first pulse signal of external input signal Laser-1 (the
One pulse signal Laser-1 is overturn as high level 0 by low level 1), a light period is completed.Infrared laser light beam power is
P2.The infrared laser light beam power relation that two kinds of different control methods are obtained is P2>>P1(the during two kinds of different control method light extractions
One pulse signal Laser-1 cycle T is identical, and duty cycle, delta is identical).Thus, it is possible to improve the working power of laser, it is to avoid
Because of working power insufficient strength and caused by the processing edge of rapidoprint burn charing, so as to realize the control of laser energy.
Wherein, S is Gaussian beam area, and the calculation formula for laser machining power is as follows：P=S/t.
Above-mentioned laser power control method is preheated by the first pulse signal to laser, laser is gathered energy
Amount.Then the second pulse signal is exported to laser again so that the energy accumulation of laser reaches " snowslide " effect, i.e. laser
Start to light.And when stopping the second pulse signal of output, the energy dropoff of laser stops luminous.Therefore, in rapidoprint
During, only simultaneously when the first pulse signal and the second pulse signal are acted on, laser lights, and laser is now
Power highest, can form the material gasification process effect of " blast " formula on substrate for printed circuit board.And in only the first pulse
During signal, laser is only in pre- Warm status, and rapidoprint will not be impacted.So as to avoid because of the not high influence of power
Processing efficiency, and cause rapidoprint to process the phenomenon that edge burns charing.
As shown in figure 4, being the module map of Laser energy attenuation system.
A kind of Laser energy attenuation system, including industrial computer unit 210, Laser control unit 212 and laser element
214；The Laser control unit 212 connects the industrial computer unit 210 and the laser element 214 respectively；The laser
Control unit 212 is used to export the first pulse signal to laser element 214, the laser element 214 is in preheating shape
State；The industrial computer unit 210 is used for after time delay t, and control instruction is sent to the Laser control unit 212,
Make the Laser control unit 212 to the laser element 214 in lasting t2The second pulse signal of output in time, it is described to swash
Light device unit 214 lights；The industrial computer unit 210 is additionally operable to passing through preheating time t1Afterwards, to the Laser control unit
212 send control instruction, make the Laser control unit 212 stop exporting the first pulse signal to the laser element 214；
Wherein, t1=2t+t2；The frequency f of first pulse signal and second pulse signal, cycle T are identical, and pre- Warm status is
The state that the laser gathers strength.
Laser energy attenuation system also includes DC power source unit 216, and DC power source unit 216 connects laser controlling simultaneously
Unit 212 and laser element 214, for being powered for Laser control unit 212 with laser element 214.
In the present embodiment, what DC power source unit 216 supplied laser element 214 is the direct current that power supply is 48V.For
To Laser control unit 212 be voltage be 5V dc source.In other embodiments, Laser control unit 212 is supplied
Can be that voltage is the dc sources such as 10V, 12V or 24V.
The duty cycle, delta of first pulse signal1=t1/ T*100%.
The duty cycle, delta of second pulse signal2=t2/ T*100%.
The time delay of the relatively described second pulse signal rising edge of first pulse signal and trailing edge is t.
Laser element 214 receives luminous when the first pulse signal and the second pulse signal at the same time.
Based on above-described embodiment, the operation principle of Laser energy attenuation system is as follows：
Industrial computer unit 210 performs algorithm routine order, and Laser control unit 212 performs luminous instruction, laser controlling list
Member 212 receives after light commands and to send two-way pulse-modulated signal (the first pulse signal Laser- to the priority of laser element 214
The 1 and second pulse signal Laser-2).When laser element 214 receives external input signal the first pulse signal Laser-1
(the first pulse signal Laser-1 is overturn as high level 1 by low level 0) does not light immediately, but in " preheating " state, one
Plant wig light state.Now laser intra-cavity energy is constantly accumulated, and only when excitation reaches to a certain degree, internal energy is accumulated to can
To produce " snowslide " effect of qualitative change formula.Namely (the second pulse when receiving external input signal the second pulse signal Laser-2
Laser-2 is overturn as high level 1 by low level 0) light.The time of whole energy accumulation consumption is t, lighting time interval
For t2, (the second pulse signal Laser-2 is overturn by low level 1 is at the end of the second pulse signal of external input signal Laser-2
High level 0) stop lighting, into wig light state.At the end of the first pulse signal of external input signal Laser-1 (the
One pulse signal Laser-1 is overturn as high level 0 by low level 1), a light period is completed.
In summary, Laser energy attenuation system realizes laser element 214 and receives outside input impulse modulation letter
During number Laser-1, laser intra-cavity energy is not enough to produce " snowslide " effect of qualitative change formula, and laser element 214 is in " preheating "
State, does not light；As process time delay t, when laser element 214 receives outside input pulse-modulated signal Laser-2,
Laser intra-cavity energy, which is accumulated to, can produce qualitative change formula " snowslide ", start to light.It is achieved thereby that pulse-modulated signal is to laser
The control of beam energy, while also improving the watt level of laser beam, improves processing efficiency, effectively avoids processing
Burn charing in material processing edge.
Above-mentioned Laser energy attenuation system is preheated by the first pulse signal to laser element, makes laser element
Gather strength.Then the second pulse signal is exported to laser element again so that the energy accumulation of laser element reaches " snow
Collapsing " effect, i.e. laser element start to light.And when stopping the second pulse signal of output, the energy dropoff of laser element,
Stop luminous.Therefore, during rapidoprint, only simultaneously when the first pulse signal and the second pulse signal are acted on,
Laser element is lighted, and the power highest of laser element now, and " blast " formula can be formed on substrate for printed circuit board
Material gasification process effect., will not be to processing material and in only the first pulse signal, laser element is only in pre- Warm status
Material is impacted.So as to avoid because of the not high influence processing efficiency of power, and rapidoprint processing edge is caused to burn charing
Phenomenon.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (2)
1. a kind of laser power control method, comprises the following steps：
The first pulse signal is exported to laser, the laser is in pre- Warm status；
After time delay t, the second pulse signal is exported to the laser, the laser starts to light；
Passing through fluorescent lifetime t2Afterwards, stop exporting the second pulse signal to the laser, the laser is in preheating shape
State；
Passing through preheating time t1Afterwards, stop exporting the first pulse signal to the laser；Wherein, t1=2t+t2；Described
The frequency f of one pulse signal and second pulse signal, cycle T are identical, and the pre- Warm status laser gathers strength
State；The duty cycle, delta of first pulse signal1=t1/ T*100%；The duty cycle, delta of second pulse signal2=t2/T*
100%；
Time delay t changes, time delay t and two-way pulse-modulated signal pass with two-way pulse-modulated signal cycle difference
System is fixed；
Laser receives luminous when the first pulse signal and the second pulse signal at the same time；First pulse signal is with respect to institute
The time delay for stating the second pulse signal rising edge and trailing edge is t；The laser receives the first pulse letter at the same time
It is luminous during number with the second pulse signal；
Laser does not light immediately when receiving external input signal the first pulse signal Laser-1, but in " preheating "
State, wherein, the first pulse signal Laser-1 is overturn as high level 1 by low level 0, and now laser intra-cavity energy is constantly accumulated,
Only when excitation reaches to a certain degree, internal energy, which is accumulated to, can produce " snowslide " effect of qualitative change formula, outside defeated when receiving
Start to light when entering signal the second pulse signal Laser-2, the second pulse signal Laser-2 is overturn as high level by low level 0
1；The time of whole energy accumulation consumption is t, and lighting time interval is t2；The second pulse signal of external input signal Laser-2
At the end of stop it is luminous, wherein, the second pulse signal Laser-2 is overturn as low level 0 by high level 1, into wig light state,
At the end of the first pulse signal of external input signal Laser-1, wherein, the first pulse signal Laser-1 is turned over by high level 1
Switch to low level 0, a light period is completed.
2. a kind of Laser energy attenuation system, it is characterised in that including industrial computer unit, Laser control unit and laser list
Member；The Laser control unit connects the industrial computer unit and the laser element respectively；The Laser control unit is used
In exporting the first pulse signal to the laser element, the laser element is set to be in pre- Warm status；The industrial computer list
Member is used for after time delay t, sends control instruction to the Laser control unit, makes the Laser control unit to institute
Laser element is stated in lasting t2The second pulse signal of output in time, the laser element lights；The industrial computer unit
It is additionally operable to passing through preheating time t1Afterwards, control instruction is sent to the Laser control unit, stops the Laser control unit
Only the first pulse signal is exported to the laser element；Wherein, t1=2t+t2；First pulse signal and second arteries and veins
Frequency f, the cycle T for rushing signal are identical, and pre- Warm status is the state that the laser gathers strength；First pulse signal
Duty cycle, delta1=t1/ T*100%；The duty cycle, delta of second pulse signal2=t2/ T*100%；
Time delay t changes, time delay t and two-way pulse-modulated signal pass with two-way pulse-modulated signal cycle difference
System is fixed；
Laser receives luminous when the first pulse signal and the second pulse signal at the same time；First pulse signal is with respect to institute
The time delay for stating the second pulse signal rising edge and trailing edge is t；The laser receives the first pulse letter at the same time
It is luminous during number with the second pulse signal；
Laser does not light immediately when receiving external input signal the first pulse signal Laser-1, but in " preheating "
State, wherein, the first pulse signal Laser-1 is overturn as high level 1 by low level 0, and now laser intra-cavity energy is constantly accumulated,
Only when excitation reaches to a certain degree, internal energy, which is accumulated to, can produce " snowslide " effect of qualitative change formula, outside defeated when receiving
Start to light when entering signal the second pulse signal Laser-2, the second pulse signal Laser-2 is overturn as high level by low level 0
1；The time of whole energy accumulation consumption is t, and lighting time interval is t2；The second pulse signal of external input signal Laser-2
At the end of stop it is luminous, wherein, the second pulse signal Laser-2 is overturn as low level 0 by high level 1, into wig light state,
At the end of the first pulse signal of external input signal Laser-1, wherein, the first pulse signal Laser-1 is turned over by high level 1
Switch to low level 0, a light period is completed.
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| JP6484272B2 (en) * | 2017-03-17 | 2019-03-13 | 株式会社フジクラ | Laser processing apparatus and laser processing method |
| CN107171171B (en) * | 2017-04-28 | 2019-06-07 | 大族激光科技产业集团股份有限公司 | The modulator approach and device of laser power signal |
| CN109449741B (en) * | 2018-12-29 | 2020-10-13 | 深圳市大族数控科技有限公司 | Laser energy control system and method |
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Address after: Dazu laser Building No. 9 Nanshan District high tech Park North new road Shenzhen city Guangdong province 518055 Applicant after: HANS LASER TECHNOLOGY INDUSTRY GROUP CO., LTD. Applicant after: Shenzhen Dazu Digital Control Science & Technology Co., Ltd. Address before: 518000 Shenzhen Province, Nanshan District high tech park, North West New Road, No. 9 Applicant before: Dazu Laser Sci. & Tech. Co., Ltd., Shenzhen Applicant before: Shenzhen Dazu Digital Control Science & Technology Co., Ltd. |
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Effective date of registration: 20200612 Address after: 518101 workshop 5 / F, 1 / 2 / F, 14 / F, 17 / F, antuoshan hi tech Industrial Park, Xinsha Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 518055, the Han Dynasty laser building, No. 9 West West Road, Nanshan District hi tech park, Guangdong, Shenzhen Co-patentee before: SHENZHEN HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. Patentee before: HAN'S LASER TECHNOLOGY INDUSTRY GROUP Co.,Ltd. |
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Address after: 518101 5 / F, 1 / 2 / F, 14 / F, 17 / F, No.3 Factory building, antuoshan hi tech Industrial Park, Xinsha Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Han's CNC Technology Co.,Ltd. Address before: 518101 5 / F, 1 / 2 / F, 14 / F, 17 / F, No.3 Factory building, antuoshan hi tech Industrial Park, Xinsha Road, Shajing street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN HAN'S CNC SCIENCE AND TECHNOLOGY Co.,Ltd. |