CN206076722U - A kind of energy back laser output control system - Google Patents
A kind of energy back laser output control system Download PDFInfo
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- CN206076722U CN206076722U CN201620721047.1U CN201620721047U CN206076722U CN 206076722 U CN206076722 U CN 206076722U CN 201620721047 U CN201620721047 U CN 201620721047U CN 206076722 U CN206076722 U CN 206076722U
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- control system
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Abstract
The utility model discloses a kind of energy back laser output control system, system includes：One laser measuring unit, the laser measuring unit include integrating circuit, and the laser instantaneous power and energy of output are made a distinction by the integrating circuit, and measured energy value is fed back to control unit.A kind of energy back laser output control system of the present utility model, by adding integrating circuit in a feedback circuit, so that the instantaneous power of laser is come with energy separation so as to reach real energy back, the control accuracy and antijamming capability of system are improve.
Description
Technical field
The utility model is related to laser output control technical field, and especially a kind of energy back for improving certainty of measurement swashs
Light output control system.
Background technology
Laser is a kind of being excited and the special light sources that radiate, strong, poly- with brightness height, pure color, good directionality, coherence
The features such as collection property is good, after focusing, with high energy density, the energy density of its focal point can for the laser of some strength
Up to 107～1012 watts/centimetre.When laser is irradiated on material surface, part luminous energy is changed into heat energy after being absorbed by material, temperature
Degree is raised, when energy density is sufficiently large, it is sufficient to change the physicochemical properties of material, by the material molten in irradiated region even
Gasification.Laser Processing is exactly the process such as to carry out carving, weld, punch and cut to material using its fuel factor.
Laser welding is one of importance of laser processing technology application.Welding material is by the bombardment with laser beams of high intensity
After absorb its energy and be converted into heat energy, make illuminated place be fused into liquid, under liquid condition, welding material molecule mutually oozes
Thoroughly, after cooling, solidification forms welding.
As wlding is not contacted in welding process, energy size and its translational speed are adjustable, it is easy to accomplish automation, plus
Upper welding precision is high, speed is fast, heat affected area is narrow, deformation is little, without following process the advantages of, laser welding is more and more extensively answered
For the welding of the precision manufactureing industry associated components such as microelectronics, jewellery, handicraft, automobile, new forms of energy, aviation.
The generation of laser is the electro-optical conversion process of series of complex, has too many factor direct during this complexity
Or the stable output of remote-effects laser energy, the such as heat endurance of electronic device, optics, the fluctuation of line voltage, device
Aging etc., usually up to suitable amplitudes of these fluctuations of part, badly influence stablizing for laser energy.
Affect the factor of Laser Welding Quality a lot, including energy density, laser pulse shape, width, frequency, out of focus
Amount, speed of welding etc., but energy density is crucial, and other factors are all built upon on the basis of suitable energy density.Close
Suitable energy density is the premise for ensureing welding quality.Too little energy density easily causes fusion penetration not enough, and not prison welding is solid etc.
Shortcoming, too high energy density easily make wlding gasify to form hole, produce " burn-through " phenomenon.Practice have shown that energy density is 104
Good fusion weld is easily realized in the range of～106J/cm2, for specific welding material, need specific energy density with
Correspondence.
But, in the measurement scheme of existing electric current or energy back laser-beam welding machine, do not account for instantaneous power
Or the unstability of electric current, directly using instantaneous power or electric current as feedback sources, instantaneous power and energy partition are have ignored, is caused
Control accuracy is not high, and under the larger environment of power network fluctuation, stablizing effect is poor, causes welding quality unstable, solder joint uniformity
Difference, fraction defective are high.
Utility model content
The purpose of this utility model is to provide a kind of energy back laser output control system, to solve current energy
The low technical problem of feedback laser output system control accuracy.
To reach above-mentioned purpose, the technical scheme proposed by the utility model is：
A kind of energy back laser output control system of the present utility model, which includes：One laser measuring unit, it is described to swash
Photo measure unit includes integrating circuit, and the instantaneous power and energy of the laser of output are made a distinction by the integrating circuit, and will
In certain hour, the energy value of (such as a laser pulse) feeds back to control unit.
Wherein, described laser measuring unit also includes：Laser sampling module, is connected to the laser sampling module output
The photoelectric switching circuit at end, the photoelectric switching circuit output are connected to the integrating circuit, and integrating circuit output end is connected to
A/D circuits.
Wherein, described laser sampling module includes high low anti-film mirror thoroughly, and the high low anti-film mirror thoroughly is by a part of laser
Energy reflexes to a photoelectric sensor, another part transmission output.
Wherein, described photoelectric switching circuit is a photodiode.
Wherein, the described height laser energy that low anti-film mirror reflects thoroughly is 2%, and the laser energy of transmission is 98%.
Wherein, described integrating circuit is a reverse imported integrating circuit, the reverse imported integrating circuit it is defeated
Go out end and be also electrically connected with data holding and output unit.
Wherein, described laser measuring unit input is connected with a laser output unit, and the laser output unit is defeated
Enter end and be connected with an electrooptic switching element, the electrooptic switching element input is connected to control unit, and described control unit is also
Power supply unit is electrically connected to, wherein, described control unit forms feedback with laser measuring unit.
Compared with prior art, a kind of energy back laser output control system of the present utility model, by feedback electricity
Add integrating circuit in road, so that the instantaneous power of laser is come with energy separation so as to reach real energy back, carry
The control accuracy and antijamming capability of high system.
Description of the drawings
Fig. 1 is a kind of allomeric function block diagram of energy back laser output control system of the present utility model.
Fig. 2 is a kind of laser measuring unit partial function frame of energy back laser output control system of the present utility model
Figure.
Fig. 3 is that a kind of laser sampling module section structure of energy back laser output control system of the present utility model is shown
It is intended to.
Fig. 4 is a kind of integrating circuit partial circuit diagram of energy back laser output control system of the present utility model.
Specific embodiment
Below with reference to accompanying drawing, give further elaboration to the utility model.
In the present embodiment, accompanying drawing 1 is referred to accompanying drawing 4, the energy back laser output control system, its core are improved
Put and be, including：One laser measuring unit, laser measuring unit include integrating circuit, the laser that the integrating circuit will be exported
Instantaneous power and energy make a distinction, and energy value is fed back to into control unit.
Referring to accompanying drawing 1, the energy back laser output control system integrally includes：For the confession that whole system is powered
Electric unit 1, power supply unit output are electrically connected to control unit 2, be also associated with one and facilitate human-computer interaction control in described control unit 2
The man-machine interface 6 of system.The output end of the control unit 2 is electrically connected to electrooptic switching element 3, the electrooptic switching element 3 it is defeated
Go out end and be electrically connected to laser output unit 4.The laser that feedback signal is provided for feedback is additionally provided with after the laser output unit 4
Measuring unit 5, laser measuring unit 5 described in Jing carry out laser output action after signal sampling in processing welding workpiece.Its
In, the sampled signal direct feedback of described laser measuring unit 5 to control unit 2, so as to form reponse system, real-time basis
Sampled signal controlled output laser energy.
More specifically, referring to accompanying drawing 2,5 yuan above-mentioned of laser measurement list also includes：Laser sampling module 51, even
The photoelectric switching circuit 52 of 51 output end of laser sampling module is connected to, the output of the photoelectric switching circuit 52 is connected to described
Integrating circuit 53,53 output end of integrating circuit are connected to A/D circuits 54.A feedback signal is formed after A/D circuits 54 described in Jing
Control unit 2 is fed back to, a closed loop feedback system is formed.The laser measuring unit 5 is the basis for realizing energy negative feedback control,
The energy (instantaneous power) being responsible in the just laser output unit time is converted to electric signal by electrical to optical converter, then integrates
The vital task of control unit is changed and is fed back to implement A/D after the laser energy in certain hour (such as a pulsewidth), is controlled
Unit processed is exactly adjusted to laser output energy on this basis, is controlled in the range of allowing.
Referring to accompanying drawing 3, above-mentioned laser sampling module 51 includes high low anti-film mirror 511 thoroughly, the saturating low anti-film of the height
A part of laser energy is reflexed to a photoelectric sensor 512, another part transmission output by mirror 511.Wherein, high low anti-film mirror thoroughly
The laser energy of 511 reflections is 2%, and the laser energy of transmission is 98%.Wherein, described photoelectric switching circuit 52 is a photoelectricity
Diode.Laser sampling module 51 is sampled to laser output energy, using light path sampling method, at light path break-in, uses
One high low anti-film mirror 511 thoroughly, reflexing to photoelectric sensor 512 by the 2% of laser energy carries out opto-electronic conversion, and remaining is 98% along light
Transmission is continued on road, neither stops working light path, is not take up too many laser energy resource again.High low anti-film mirror thoroughly is entered in laser
Resonator and front mirror were sequentially passed through also before 511.
Referring to accompanying drawing 4, described integrating circuit 53 is a reverse imported integrating circuit 531, described reversely defeated
The output end for entering type integrating circuit 531 is also electrically connected with data holding and output unit 532.The effect of integrating circuit 53, just
It is that the instantaneous power and energy partition of laser come, calculates the energy of (in a pulse) laser in certain hour, be
The precise control of controller provides data foundation.Control end connects control unit 2, controls the start-stop of integrating circuit 53 by CPU, can
With the laser pulse drive signal using electro-optical conversion circuit, the start-stop work period of integrating circuit 53 and rising for laser pulse are made
Only time consistency, realizes the effective measurement to pulsed laser energy.During end-of-pulsing, integrated value reaches maximum, and this maximum is
For the relative energy of laser pulse.Under the control of the controller, this number is sent to data and keeps being cached with output unit and being fed back
To controller.
The present embodiment also discloses a kind of feedback using as above arbitrarily described energy back laser output control system
Measuring method, the feedback measuring method include：The laser instantaneous power sampled signal of output is integrated, the instantaneous of laser is made
The step of power is distinguished with energy.I.e. in energy back laser output control closed-loop system, adopt in feedback signal sampling section
With integrating circuit, sampled signal is integrated so as to which instantaneous power and energy make a distinction, so as to accurately quickly exist to system
Because the disturbance that destabilizing factor is caused produces feedback in work, so that system is in more smart metastable working condition.
Preferably, it is described that the laser instantaneous power sampled signal of output is integrated, make the instantaneous power and energy of laser
Also include before the step of amount is distinguished：The step of laser being sampled using high saturating low anti-film mirror.Using high low anti-plated film thoroughly
Mirror is in order to obtain the laser energy of minimum as sampled signal, while not affecting the output of whole laser.
Energy back laser output control system of the present utility model, in measurement scheme, increases integrating circuit, seeks to
The instantaneous output and energy partition of laser are come, the energy of (in a pulse) laser in certain hour, product is calculated
The integration start-stop of parallel circuit is provided by control unit, it is possible to use the laser pulse drive signal of electro-optical conversion circuit, makes integration
The start-stop work period of circuit is consistent with the beginning and ending time of laser pulse, realizes the effective measurement to pulsed laser energy, accomplishes
Real energy negative-feedback.Improve the stability and antijamming capability of laser output system.
The above, preferred embodiment only of the present utility model, is not intended to limit embodiment of the present utility model,
Those of ordinary skill in the art can very easily carry out corresponding accommodation according to central scope of the present utility model and spirit
Or modification, therefore protection domain of the present utility model should be defined by the protection domain required by claims.
Claims (7)
1. a kind of energy back laser output control system, it is characterised in that include：One laser measuring unit, the Laser Measuring
Amount unit includes integrating circuit, and the instantaneous power and energy of the laser of output are made a distinction by the integrating circuit, and by energy
Value feeds back to control unit.
2. energy back laser output control system as claimed in claim 1, it is characterised in that described laser measuring unit
Also include：Laser sampling module, is connected to the photoelectric switching circuit of the laser sampling module output end, the opto-electronic conversion electricity
Road output is connected to the integrating circuit, and integrating circuit output end is connected to A/D circuits.
3. energy back laser output control system as claimed in claim 2, it is characterised in that described laser sampling module
Including high low anti-film mirror thoroughly, a part of laser energy is reflexed to a photoelectric sensor, another part by the high low anti-film mirror thoroughly
Transmission output.
4. energy back laser output control system as claimed in claim 2, it is characterised in that described photoelectric switching circuit
For a photodiode.
5. energy back laser output control system as claimed in claim 3, it is characterised in that described height low anti-film mirror thoroughly
The laser energy of reflection is 2%, and the laser energy of transmission is 98%.
6. energy back laser output control system as claimed in claim 1, it is characterised in that described integrating circuit is
Reverse imported integrating circuit, the output end of the reversely imported integrating circuit are also electrically connected with a data and keep and output list
Unit.
7. energy back laser output control system as claimed in claim 1, it is characterised in that described laser measuring unit
Input is connected with a laser output unit, and the laser output unit input is connected with an electrooptic switching element, the electricity
Optical conversion element input is connected to control unit, and described control unit is also electrically coupled to power supply unit, wherein, described control
Unit forms feedback with laser measuring unit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620721047.1U CN206076722U (en) | 2016-07-08 | 2016-07-08 | A kind of energy back laser output control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620721047.1U CN206076722U (en) | 2016-07-08 | 2016-07-08 | A kind of energy back laser output control system |
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| CN206076722U true CN206076722U (en) | 2017-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169692A (en) * | 2016-07-08 | 2016-11-30 | 深圳市光大激光科技股份有限公司 | A kind of energy back laser output control system and feedback measuring method thereof |
-
2016
- 2016-07-08 CN CN201620721047.1U patent/CN206076722U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169692A (en) * | 2016-07-08 | 2016-11-30 | 深圳市光大激光科技股份有限公司 | A kind of energy back laser output control system and feedback measuring method thereof |
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