CN105938974A - Laser variable pulse width protection system - Google Patents
Laser variable pulse width protection system Download PDFInfo
- Publication number
- CN105938974A CN105938974A CN201610402999.1A CN201610402999A CN105938974A CN 105938974 A CN105938974 A CN 105938974A CN 201610402999 A CN201610402999 A CN 201610402999A CN 105938974 A CN105938974 A CN 105938974A
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- pulse width
- laser
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- frequency pulse
- feedback unit
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- 238000003079 width control Methods 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract 2
- 238000012545 processing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 10
- 230000003044 adaptive effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000005305 interferometry Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention provides a laser variable pulse width protection system, which comprises a laser device, a laser light source, reflectors, a collecting lens, a work tip and a frequency pulse width control system, wherein the frequency pulse width control system is connected with a laser power supply; and the laser power supply is connected with the laser device; and the laser device, the reflector, the reflector, the collecting lens, the reflector and the work tip are sequentially connected to form a laser transmission path. The initial laser work pulse width and the pulse width change rate are automatically adjusted according to the preset frequency and pulse width of laser medical equipment; and meanwhile, a temperature value is monitored, so that dynamic adjustment is arranged; and an optical element is prevented from being damaged.
Description
Technical field
The present invention relates to a kind of laser variable pulse width protection system, for dentistry laser medical equipment, product belongs to field of medical device.
Background technology
During the use of laser medical equipment, owing to water has strong Absorption to the laser of specific infrared wavelength, therefore
In wet environment and to the mechanism of tissue can produce violent temperature rise, the damage of optical element can be caused.Profit
Control the produced temperature rise speed of laser by the mode controlling laser pulse width, be the simple and effective method solving this problem.Adopt
By preset pulse width variations scheme, eliminate temperature in conjunction with Temperature Feedback and steeply rise the destruction brought.
In laser structure and optical system, laser instrument and operation material, total reflective mirror, outgoing mirror, broadly fall into optical element, all
Being coated with optical medium film, in wet condition, during laser works, media coating all can generate heat, and temperature rise acutely will result in damage
Bad.Reflecting mirror, focus lamp, operation tip, as the optical element on laser delivery optics, be coated with anti-reflection deielectric-coating equally, with
Sample is easily damaged.And operation tip is owing to can contact water smoke and tissue, end face vulnerable to pollution, the absorption for laser can very
Acutely, violent temperature rise can bring other impact, affects the normal use of system.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to design a kind of laser variable pulse width protection system, in the initial work of laser instrument
Make the stage, export the pulsewidth narrower than actual setpoint, thus control the output of laser, slow down and draw owing to laser power is excessive
The violent temperature rise risen, monitors temperature value simultaneously, thus dynamically adjusts, and protection optical element is not damaged by.
The technical solution adopted in the present invention is:
A kind of laser variable pulse width protection system is provided, it is characterised in that: include laser instrument, Laser Power Devices, reflecting mirror, condenser lens,
Operation tip, frequency Pulse Width control system；Frequency Pulse Width control system is connected with Laser Power Devices, Laser Power Devices connecting laser, swashs
Light device, reflecting mirror, reflecting mirror, condenser lens, reflecting mirror, operation tip are linked in sequence composition laser delivery optics successively.
Laser variable pulse width protection system as above a kind of, it is characterised in that: its frequency Pulse Width control system include controller,
Input module, light path Temperature Feedback unit, operating temperature feedback unit, frequency pulse width modulated unit, controller respectively with input
Module, light path Temperature Feedback unit, operating temperature feedback unit, frequency pulse width modulated unit electrically connect, input module, frequency
Pwm unit electrically connects with Laser Power Devices respectively, and light path Temperature Feedback unit is arranged on laser delivery optics, operating temperature
Feedback unit is arranged on operation tip.
A kind of laser variable pulse width protection system as above, it is characterised in that: frequency Pulse Width control system also includes unknown disturbances
Measuring unit, known disturbances input block, performance indications measuring unit, controller include processing module, adapt to mechanism module,
Comparator module, input module includes reference input module, given Index module；Controller respectively with input module, light path temperature
Degree feedback unit, operating temperature feedback unit, the electrical connection of frequency pulse width modulated unit, input module, frequency pulse width modulated unit
Electrically connect with Laser Power Devices respectively；Light path Temperature Feedback unit is arranged on laser delivery optics, and operating temperature feedback unit is arranged
On operation tip；Frequency pulse width modulated unit connects unknown disturbances measuring unit, known disturbances input block, performance indications respectively
Measuring unit, performance indications measuring unit is also connected with known disturbances input block, comparator module, reference input module.
A kind of laser variable pulse width protection system as above, it is characterised in that: the controller of frequency Pulse Width control system is monolithic
Machine, PLC, computer.
A kind of laser variable pulse width protection system as above, it is characterised in that: light path Temperature Feedback unit feeds back with operating temperature
Unit all includes temperature sensor, and temperature sensor is critesistor, PT resistance, temp.-sensitive diodes, temperature sensitive audion or infrared
Hygrosensor.
Beneficial effects of the present invention is as follows:
A kind of laser variable pulse width protection system of present invention design, the frequency preset according to laser medical equipment and pulsewidth, automatically adjust
Whole initial laser work pulsewidth and pulse width variations rate, at the initial working stage of laser instrument, export the pulsewidth narrower than actual setpoint,
Thus control the output of laser, slow down the violent temperature rise caused owing to laser power is excessive, monitor temperature value simultaneously, thus
Dynamically adjusting, protection optical element is not damaged by.
Accompanying drawing explanation
Fig. 1: laser variable pulse width protection system diagram
Fig. 2: frequency Pulse Width control system figure
Fig. 3: laser fixed pulse width controls figure
Fig. 4: laser gradual change increases pulse-width controlled figure
Fig. 5: adaptive control system schematic diagram
Detailed description of the invention
As Figure 1-5, figure includes: laser instrument 1, Laser Power Devices 2, reflecting mirror (3,4,5), condenser lens 6, work
Work point 7, frequency Pulse Width control system 9, controller 11, input module 12, light path Temperature Feedback unit 13, operating temperature are anti-
Feedback unit 14, frequency pulse width modulated unit 15.Processing module 111, adapts to mechanism module 112, comparator module 113, ginseng
Examine input module 121, given Index module 122, unknown disturbances measuring unit 16, known disturbances input block 17, performance refer to
Mark measuring unit 18.
Offer a kind of laser variable pulse width protection system, as shown in Figure 1-2, including: laser instrument 1, Laser Power Devices 2, reflecting mirror
(3,4,5), condenser lens 6, operation tip 7, frequency Pulse Width control system 9；Frequency Pulse Width control system 9 and Laser Power Devices 2
Connect, Laser Power Devices 2 connecting laser 1, laser instrument 1, reflecting mirror 3, reflecting mirror 4, condenser lens 6, reflecting mirror 5, work
Point 7 is linked in sequence composition laser delivery optics successively.
A kind of laser variable pulse width protection system as above, its frequency Pulse Width control system 9 includes: controller 11, input mould
Block 12, light path Temperature Feedback unit 13, operating temperature feedback unit 14, frequency pulse width modulated unit 15；Processor 11 is respectively
Electrically connect with input module 12, light path Temperature Feedback unit 13, operating temperature feedback unit 14, frequency pulse width modulated unit 15,
Input module 12, frequency pulse width modulated unit 15 electrically connect with Laser Power Devices 2 respectively；Light path Temperature Feedback unit 13 is arranged on
On laser delivery optics, as being arranged in laser instrument 1,6 maybe can be arranged on reflecting mirror (3-5), condenser lens；Work
Make Temperature Feedback unit 14 to be arranged on operation tip 7.
A kind of laser variable pulse width protection system as above, its frequency Pulse Width control system 9 includes: controller 11, input mould
Block 12, light path Temperature Feedback unit 13, operating temperature feedback unit 14, frequency pulse width modulated unit 15, unknown disturbances are measured
Unit 16, known disturbances input block 17, performance indications measuring unit 18；Controller 11 includes processing module 111, adapts to
Mechanism module 112, comparator module 113；Input module 12 includes reference input module 121, given Index module 122；
Processor 11 respectively with input module 12, light path Temperature Feedback unit 13, operating temperature feedback unit 14, frequency pulse width modulated
Unit 15 electrically connects, and input module 12, frequency pulse width modulated unit 15 electrically connect with Laser Power Devices 2 respectively.Light path temperature is anti-
Feedback unit 13 be arranged on laser delivery optics, as being arranged in laser instrument 1, maybe can be arranged on reflecting mirror (3-5),
On condenser lens 6；Operating temperature feedback unit 14 is arranged on operation tip 7.Frequency pulse width modulated unit 15 connects the unknown respectively
Interferometry unit 16, known disturbances input block 17, performance indications measuring unit 18；Performance indications measuring unit 18 also connects
Connect known disturbances input block 17, comparator module 113, reference input module 121.
A kind of laser variable pulse width protection system as above, light path Temperature Feedback unit 13 is with operating temperature feedback unit 14 all
Including temperature sensor, temperature sensor can use critesistor, PT resistance, temp.-sensitive diodes, temperature sensitive audion, infrared temperature
Degree detector etc..
A kind of laser variable pulse width protection system as above, its frequency Pulse Width control system 9 includes controller 11, input module
12, light path Temperature Feedback unit 13, operating temperature feedback unit 14, frequency pulse width modulated unit 15；Controller 11 uses list
Sheet machine, PLC, computer etc..
A kind of laser variable pulse width protection system is provided, including: laser instrument 1, Laser Power Devices 2, reflecting mirror (3,4,5), optically focused
Mirror 6, operation tip 7, frequency Pulse Width control system 9；Frequency Pulse Width control system 9 electrically connects with Laser Power Devices 2, Laser Power Devices
2 connecting lasers 1, laser instrument 1, reflecting mirror 3, reflecting mirror 4, condenser lens 6, reflecting mirror 5, operation tip 7 order successively connects
Connecing composition laser delivery optics, laser instrument 1 sends laser, is reflected mirror 3, reflecting mirror 4, condenser lens 6, reflecting mirror 5 last
Arrive operation tip 7.
By temperature rise produced by laser and working environment, such as humidity, and the time of laser work, pattern, cooling condition is all
Relevant.When ambient humidity increases, and laser optical element is aging, and laser instrument inner member temperature rise will be accelerated, or when swashing
Light device works long hours, and when internal holding temperature is higher, temperature rise will be the most violent.Therefore 7 internal temperature sensors are added,
For monitoring laser instrument and interior lights circuit component temperature, reasonably adjust laser pulse width protection scheme.
Operation tip is the element in therapeutic process with external contact, the adhesion of dust, water and other pollutant, all can be at laser
Different thermotonuses is produced when acting on its surface.Therefore outer temperature sensor is added, for the real time temperature of monitoring point,
And to laser pulse width Reasonable adjustment, protection operation tip and the safety for the treatment of.
As Figure 1-5, during equipment work, by input module 9, the laser work pattern of needs is set, including power,
Pulsewidth, frequency, etc. parameter, input module can be touch screen, keyboard, mouse etc..The parameter arranged inputs to Laser Power Devices
2 and processor 11, controller is single-chip microcomputer, PLC, computer, and temperature information is fed back to processor by temperature sensor simultaneously,
Processor, according to program, calculates and exports corresponding pulse-width adjustment scheme, exports to Laser Power Devices 2, and Laser Power Devices are according to instruction control
The laser output of laser instrument 1 processed.
As shown in Figure 3-4, the good output of laser setup, actually set laser output amplitude, laser pulse width, swash
Light operating frequency, the output of practical laser is proportional to appeal three numerical value, say, that such as we are the pulsewidth of laser
Reducing half, the mean power of practical laser output also can reduce half.
At the initial period of laser according to the setting operating power of laser, adjust the output protection pulsewidth of laser, preheat by low-power
Time so that temperature slowly rises, then according still further to setting working value work.Meanwhile, in the control mode of laser pulse width,
Can be in the way of using fixed pulse width, it would however also be possible to employ the mode of gradual change pulsewidth so that the change of laser power is the mildest, right
The most more flexible in the control of temperature rise.
On laser pulse width controls, we can use default pulse width modulating scheme, as shown in Figure 3-4, defeated according to specific laser
Going out to use and arrange, if arranging preheating width parameter, such as we can specially set and allow with the pulsewidth of real work laser pulse width half
Laser instrument work ahead 10 seconds, works with normal-width the most again. and the program is relatively simple, operates the most more convenient.
For the use environment of some complexity, in such as using, often change laser power or laser frequency, and the situation of pulsewidth
Under, the enthusiasm condition of laser instrument often changes, and single presupposed solution can not meet requirement, and we will use self-adaptive controlled
System, according to real-time device temperature situation, and temperature variations dynamically adjusts laser preheating pulsewidth.
A kind of auto-adaptive control theory as shown in Figure 5, including controller 11, input module 12, light path Temperature Feedback unit
13, operating temperature feedback unit 14, frequency pulse width modulated unit 15, unknown disturbances measuring unit 16, known disturbances input list
Unit 17, performance indications measuring unit 18.Controller 11 includes processing module 111, adapts to mechanism module 112, comparator module
113；Input module 12 includes reference input module 121, given Index module 122.
Adaptive control system is a system with certain adaptive ability, it can the change of epistemic context condition, and from
Dynamic(al) correction control action, makes system reach the control effect of optimum.System according to reference input r (t), control input U (t),
Object output C (t), known external disturbance n (t) are measured object performance indications 18 and carry out with given performance indications 122
Relatively 112, make a policy, then change systematic parameter by adaptation mechanism module 112, or produce the control of an auxiliary
Input quantity processed, is added in system, to ensure that system follows the tracks of upper given optimal performance index 122, make system be in optimum or
The duty of suboptimum.Differing from it and comprising performance indications closed loop of Adaptable System and other system, has in essence
There is the function of " identification-decision-making-amendment ".
Beneficial effects of the present invention is as follows:
A kind of laser variable pulse width protection system of present invention design, the frequency can preset according to laser medical equipment and pulsewidth, from
Dynamic adjustment initiates laser work pulsewidth and pulse width variations rate, at the initial working stage of laser instrument, exports narrower than actual setpoint
Pulsewidth, thus control the output of laser, slow down the violent temperature rise caused owing to laser power is excessive, monitor temperature value simultaneously,
Thus dynamically adjust, protection optical element is not damaged by.
The above is only the preferred embodiment of the present invention, it should be understood that the present invention is not limited to form disclosed herein,
It is not to be taken as the eliminating to other embodiments.And the change that those skilled in the art are carried out and change without departing from the present invention spirit and
Scope, the most all should be in the protection domain of claims of the present invention.
Claims (5)
1. a laser variable pulse width protection system, it is characterised in that: include laser instrument, Laser Power Devices, reflecting mirror, condenser lens, work
Make point, frequency Pulse Width control system；Frequency Pulse Width control system is connected with Laser Power Devices, Laser Power Devices connecting laser, swashs
Light device, reflecting mirror, reflecting mirror, condenser lens, reflecting mirror, operation tip are linked in sequence composition laser delivery optics successively.
A kind of laser variable pulse width protection system the most according to claim 1, it is characterised in that: its frequency Pulse Width control system bag
Include controller, input module, light path Temperature Feedback unit, operating temperature feedback unit, frequency pulse width modulated unit, control
Device electrically connects with input module, light path Temperature Feedback unit, operating temperature feedback unit, frequency pulse width modulated unit respectively,
Input module, frequency pulse width modulated unit electrically connect with Laser Power Devices respectively, and light path Temperature Feedback unit is arranged on Laser Transmission
In light path, operating temperature feedback unit is arranged on operation tip.
A kind of laser variable pulse width protection system the most according to claim 2, it is characterised in that: frequency Pulse Width control system is also wrapped
Including unknown disturbances measuring unit, known disturbances input block, performance indications measuring unit, controller includes processing module, fits
Answering mechanism module, comparator module, input module includes reference input module, given Index module；Frequency pulse width modulated list
Unit connects unknown disturbances measuring unit, known disturbances input block, performance indications measuring unit respectively, and performance indications are measured single
Unit is also connected with known disturbances input block, comparator module, reference input module.
A kind of laser variable pulse width protection system the most according to claim 2, it is characterised in that: the control of frequency Pulse Width control system
Device processed is single-chip microcomputer, PLC or computer.
A kind of laser variable pulse width protection system the most according to claim 2, it is characterised in that: light path Temperature Feedback unit and work
Making Temperature Feedback unit and all include temperature sensor, temperature sensor is critesistor, PT resistance, temp.-sensitive diodes, temperature
Quick audion or infrared temperature sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402999.1A CN105938974B (en) | 2016-06-08 | 2016-06-08 | A kind of laser variable pulse width protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610402999.1A CN105938974B (en) | 2016-06-08 | 2016-06-08 | A kind of laser variable pulse width protection system |
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| Publication Number | Publication Date |
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| CN105938974A true CN105938974A (en) | 2016-09-14 |
| CN105938974B CN105938974B (en) | 2019-02-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863681A (en) * | 2017-11-23 | 2018-03-30 | 黑龙江工程学院 | A kind of four mirror ring resonator laser pulse width automatic compression methods |
| CN113959492A (en) * | 2021-10-22 | 2022-01-21 | 济南森峰激光科技股份有限公司 | Light path protection monitoring system of self-adaptation threshold value |
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| US20060007832A1 (en) * | 2002-08-29 | 2006-01-12 | Kunihiko Horikawa | Information recording device and information recording method |
| US20060111697A1 (en) * | 2003-07-11 | 2006-05-25 | Medizinisches Laserzentrum Luebeck Gmbh | Method for operation of laser |
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| US20110196355A1 (en) * | 2008-11-18 | 2011-08-11 | Precise Light Surgical, Inc. | Flash vaporization surgical systems |
| CN102334249A (en) * | 2009-01-15 | 2012-01-25 | 伊雷克托科学工业股份有限公司 | Pulse temporal programmable ultrafast burst mode laser for micromachining |
| CN103904547A (en) * | 2012-12-26 | 2014-07-02 | 三星电机株式会社 | Pulsed laser system and driving method thereof |
| CN105081574A (en) * | 2015-09-18 | 2015-11-25 | 大连理工大学 | Method for lowering hot cracking tendency of invar welding through layered pulse lasers |
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2016
- 2016-06-08 CN CN201610402999.1A patent/CN105938974B/en active Active - Reinstated
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060007832A1 (en) * | 2002-08-29 | 2006-01-12 | Kunihiko Horikawa | Information recording device and information recording method |
| US20060111697A1 (en) * | 2003-07-11 | 2006-05-25 | Medizinisches Laserzentrum Luebeck Gmbh | Method for operation of laser |
| US20070073279A1 (en) * | 2005-09-29 | 2007-03-29 | Alcon, Inc. | Variable continuous wave laser |
| US20110196355A1 (en) * | 2008-11-18 | 2011-08-11 | Precise Light Surgical, Inc. | Flash vaporization surgical systems |
| CN102334249A (en) * | 2009-01-15 | 2012-01-25 | 伊雷克托科学工业股份有限公司 | Pulse temporal programmable ultrafast burst mode laser for micromachining |
| CN103904547A (en) * | 2012-12-26 | 2014-07-02 | 三星电机株式会社 | Pulsed laser system and driving method thereof |
| CN105081574A (en) * | 2015-09-18 | 2015-11-25 | 大连理工大学 | Method for lowering hot cracking tendency of invar welding through layered pulse lasers |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863681A (en) * | 2017-11-23 | 2018-03-30 | 黑龙江工程学院 | A kind of four mirror ring resonator laser pulse width automatic compression methods |
| CN113959492A (en) * | 2021-10-22 | 2022-01-21 | 济南森峰激光科技股份有限公司 | Light path protection monitoring system of self-adaptation threshold value |
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| CN105938974B (en) | 2019-02-05 |
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Application publication date: 20160914 Assignee: VICTRUM (BEIJING) LASER TECHNOLOGY Co.,Ltd. Assignor: BEIJING YAKETONG MEDICAL TECHNOLOGY Co.,Ltd. Contract record no.: X2021980003570 Denomination of invention: A laser variable pulse width protection system Granted publication date: 20190205 License type: Common License Record date: 20210514 |
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Effective date of registration: 20240201 Address after: 101399 Building 11, No. 12 Juyuan Middle Road, Mapo Town, Shunyi District, Beijing, 201 and 202 Patentee after: VICTRUM (BEIJING) LASER TECHNOLOGY CO.,LTD. Guo jiahuodiqu after: Zhong Guo Address before: Room 702, Weidi Technology Building, No. A8 Zhongguancun South Street, Haidian District, Beijing, 100081 Patentee before: BEIJING YAKETONG MEDICAL TECHNOLOGY CO.,LTD. Guo jiahuodiqu before: Zhong Guo |