CN107999471A - Remote online defect expressivity device, laser ablation system - Google Patents
Remote online defect expressivity device, laser ablation system Download PDFInfo
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- CN107999471A CN107999471A CN201711300917.3A CN201711300917A CN107999471A CN 107999471 A CN107999471 A CN 107999471A CN 201711300917 A CN201711300917 A CN 201711300917A CN 107999471 A CN107999471 A CN 107999471A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0035—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
- B08B7/0042—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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Abstract
This application discloses a kind of remote online defect expressivity device, laser ablation system.The equipment includes：Laser, for removing metal oxide；Controller, for controlling the laser ablation degree of the laser, wherein, the laser ablation degree is used to establish the metal oxide hierarchical mode progress layered shaping；And the controller controls the laser to carry out hot line job during defect expressivity.Present application addresses the system of removal can not remotely, the technical problem of online elimination defect.
Description
Technical field
This application involves power domain, in particular to a kind of remote online defect expressivity device, laser ablation system
System.
Background technology
High voltage isolator, is commonly called as " disconnecting link ".It is a kind of most commonly used electric appliance, the work of itself in high-voltage switch electric appliance
Make principle and relatively simple for structure, but big due to the use of amount, functional reliability requires high, and the safety of substation, circuit is transported
Row has a great influence.Outdoor high-voltage isolating switch can trigger various failures, it has been experienced that more than 90% after operation for many years
Failure is all that disconnecting link joint fault triggers, and disconnecting link joint fault is largely the excessive initiation of temperature.
In high-tension power transmission and transformation equipment, high voltage isolator is the equipment for being uniquely fully exposed to work in atmospheric environment,
Therefore it is also the electrical equipment influenced by natural environment and climate condition most directly with maximum.The hot and cold of nature, wind, rain, mist,
Filth in snow, ice, frost, solarization, sand and dust, moisture and air etc. all can cause degree not to each component of high voltage isolator
Same infringement, and resulting corrosion and corrosion will influence its various performance.Since corrosion can cause to rotate and the company of transmission
Connect clamping stagnation and divide-shut brake is not in place, operating force increase, causes porcelain vase to damage and fracture；Corrosion can also make mechanical transmission component intensity
Decline and deform or damage；Corrosion can also cause conducting system loose contact and electric conductivity to weaken and overheat etc. occurs
Deng.
Traditional mechanical brossage and chemical derusting method, engineering is huge and complicated, and rust powder and rust remover not only have
Evil seriously pollutes environment in the health of worker.Away rust by laser is an important applied field of laser cleaning technique,
Compared with traditional derusting method such as mechanical derusting, chemical derusting, have the characteristics that:Cleannes are far above conventional cleaning process.
It is applied widely, such as top layer corrosion, zinc-plated of bridge, television transmitting tower, the overhead building of the brandreth of ultra-high-tension power transmission line
The red rust of plate surface, the oxide layer on copper material surface etc.；By regulating and controlling laser process parameter, the basis of substrate surface is not being damaged
On, rusty stain can be effectively removed, surface is restored sth. to its original state；Away rust by laser equipment is used multiple times, and operating cost is low, predominantly
The power consumption of laser；Laser cleaning technique is a kind of " green " cleaning, and discarded object can use vacuum holding while cleaning
Put and be collected, handle, environment is not polluted substantially；The corrosion in metal surface and corner can be efficiently and rapidly removed,
And the hardness and resistance to corrosion on surface can be improved.
Inventor has found, needs that remote operation can be carried out and not during the operation and maintenance of high voltage isolator
In the case of power failure, corrosion heating defect is eliminated.The equipment that failure can further be solved is undoubtedly currently most preferably technology hand
Section.
For in correlation technique remove system can not remotely, online elimination defect the problem of, at present not yet propose effectively
Solution.
The content of the invention
The main purpose of the application is to provide a kind of remote online defect expressivity device, can not be remote to solve removal system
The problem of journey, online elimination defect.
To achieve these goals, according to the one side of the application, there is provided a kind of remote online defect expressivity device.
Included according to the remote online defect expressivity device of the application：Laser, for removing metal oxide；Control
Device, for controlling the laser ablation degree of the laser, wherein, the laser ablation degree is used for the metal oxide
Establish hierarchical mode and carry out layered shaping；And the controller controls the laser to carry out hot line job during defect expressivity.
Further, the laser is connected with the controller by wireless or wired mode.
Further, the laser includes：Nd:YAG laser.
Further, the controller includes：First determining device, the first output parameter for judging the laser are
The first preset condition of no satisfaction；First actuator, meets the first preset condition for the first output parameter in the laser
When, the first predetermined registration operation is performed to the laser.
Further, the controller includes：Second determining device, the second output parameter for judging the laser are
The second preset condition of no satisfaction；Second actuator, meets the second preset condition for the second output parameter in the laser
When, the second predetermined registration operation is performed to the laser.
Further, the controller includes：First simulation unit, for removing temperature change during metal oxide
Emulated；First result unit, for determining the first simulation result of the first simulation unit；Second simulation unit, for pair
Surface displacement change when removing metal oxide is emulated；Second result unit, for determining the of the second simulation unit
Two simulation results；And the 3rd actuator, for the emulation knot according to first simulation unit, second simulation unit
Fruit, the 3rd predetermined registration operation is performed to the laser ablation degree of the laser.
Further, the laser ablation degree is used to establish the metal oxide hierarchical mode progress layered shaping
Including：First layer, the second layer and third layer, for as rusty scale；4th layer, for as steel basalis.
Further, the laser, for removing the metal oxide of high voltage isolator contact；The controller,
For controlling laser according to the physical chemistry effect of laser ablation and the removal metal oxide of elastic vibration effect.
Further, the controller is used to control the laser to carry out following one or more kinds of operations：Laser
That burns candle goes division operation；Thermal-elastic expansion goes division operation；What fragmentation was peeled off goes division operation；Division operation is gone in vibration pop-up.
To achieve these goals, according to the another aspect of the application, there is provided a kind of laser ablation system.
Included according to the laser ablation system of the application：The remote online defect expressivity device and management server,
The management server, for using BiDoseResp models, analysis peak of luminous intensity and the relation for acting on laser energy, meter
Calculate the critical data of oxide-base bulk damage energy value to be removed；The remote online defect expressivity device, for receiving
The remote control commands of management server are stated, and performs and goes division operation
In the embodiment of the present application, by the way of hot line job, by laser and controller, remote online has been reached
The purpose that defect disappears, it is achieved thereby that remove metal oxide technique effect, and then solve removal system can not remotely,
Line eliminates the technical problem of defect.In the embodiment of the present application also specifically in electric system mesohigh disconnecting switch contact
The problem of corrosion fever, carry out the basic research of laser ablation metal oxide application, disclose pulse laser and remove metal oxidation
The mechanism of action of thing, establishes and is used for the remote online defect expressivity device that laser removes system online.It is provided with for hotline maintenance
The technological means of effect, abatement apparatus operation hidden danger, improves electric power system safety, there is provided good service.
Brief description of the drawings
The attached drawing for forming the part of the application is used for providing further understanding of the present application so that the application's is other
Feature, objects and advantages become more apparent upon.The illustrative examples attached drawing and its explanation of the application is used to explain the application, not
Form the improper restriction to the application.In the accompanying drawings：
Fig. 1 is the remote online defect expressivity schematic device according to the application first embodiment；
Fig. 2 is the remote online defect expressivity schematic device according to the application second embodiment；
Fig. 3 is the remote online defect expressivity schematic device according to the application 3rd embodiment；
Fig. 4 is the remote online defect expressivity schematic device according to the application fourth embodiment；
Fig. 5 is the remote online defect expressivity schematic device according to the 5th embodiment of the application；And
Fig. 6 is the laser ablation system schematic according to the application first embodiment.
Embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction with the embodiment of the present application
Attached drawing, is clearly and completely described the technical solution in the embodiment of the present application, it is clear that described embodiment is only
The embodiment of the application part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's all other embodiments obtained without making creative work, should all belong to the model of the application protection
Enclose.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments herein described herein.In addition, term " comprising " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps clearly listed or unit, but may include without clear
It is listing to Chu or for the intrinsic other steps of these processes, method, product or equipment or unit.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Laser cleaning process in the application is actually the process of high-order harmonics spectrum, including a series of complex
Chemical Physics effect.Many researchers have done this substantial amounts of research, and research shows, pollutant and the object accompanying by it
Combination power between surface mainly has：Covalent bond, double dipole, capillarity, hydrogen bond, Van der Waals for and electrostatic force, its
Middle Van der Waals for, capillarity, electrostatic force are most difficult to destroy.Laser cleaning is exactly to utilize the spies such as the high brightness of laser in fact
Property, these active forces between pollutant and object are destroyed, without damaging object in itself.Due to the component and structure of pollutant
Complexity, the mechanism that laser acts on therewith is also different, and scientists propose various theoretical models, this is solved.On
There are many kinds to explain to remove the mechanism of body surface material using laser emission, be substantially attributable to three classes：
1) (gasification) is evaporated：Fragmentation is peeled off, vibration is ejected, evaporation (gasification).Due to the chemical composition of matrix and pollutant
Difference, so also different to the absorptivity of laser, if the type of laser and pulsewidth selection are proper, matrix can reflect 95%
Laser above, so that any damage will not be subject to, and pollutant will absorb most of laser energy.Make own temperature wink
Between rise and produce gasification Yuan achieve the purpose that pollutant is removed and matrix is injury-free.
2) fragmentation is peeled off：Pollutant minuteness particle overcomes surface attraction in moment heat absorption expansion chipping Yuan of Yuan, so that
Depart from body surface, since the laser action time is extremely short, the great explosive forces of acceleration can be produced in moment, it is sufficient to provide
The enough acceleration of minuteness particle depart from the absorption of matrix.
3) vibration pop-up：Since the pulsewidth of laser beam is very small, so under the repeated action of pulse, it will make to be cleaned
Workpiece produce ultrasonic vibration, and then produce shock wave by particle shake it is broken from matrix surface eject.
As shown in Figure 1, the remote online defect expressivity device in the embodiment of the present application, including：Laser 10, for removing
Metal oxide；Controller 20, for controlling the laser ablation degree of the laser 10, wherein, the laser ablation degree
Layered shaping is carried out for establishing hierarchical mode to the metal oxide；The controller 20 controls the laser 10 to carry out
Hot line job during defect expressivity.Preferably, the laser 10 as shown in Figure 2 passes through wireless or wired with the controller 20
Mode connects.Remote control can be realized by the controller 20.The laser 10, is touched for removing high voltage isolator
The metal oxide of point；The controller 20, for controlling physical chemistry effect and elasticity of the laser 10 according to laser ablation
The removal metal oxide of dither effect.
Laser 10, is a kind of green cleaning technique for laser cleaning technique, discarded object can use while cleaning
Vacuum plant is collected, handles, and environment is not polluted substantially；Metal surface and corner can efficiently and rapidly be removed
Corrosion, and the hardness and resistance to corrosion on surface can be improved.Residue is mostly solid powder, and environment will not be impacted.Carry
Go out during operation and maintenance to need one kind can remote operation, and in the case where not having a power failure, eliminate corrosion heating defect, solution
The certainly equipment of failure, has the following advantages at least enclosed mass using laser cleaning technique：First, laser cleaning is a kind of non-contacting clear
Washing method.Secondly, laser cleaning can carry out the cleaning of precision, can be accurately positioned at cleaning action and efficient
Remove micron-sized contaminant particle.Furthermore laser cleaning processing quality is high, during laser cleaning, workpiece is from external force
Influence, the mechanical damage of workpiece will not be caused.
As preferred in the present embodiment, the laser includes：Nd:YAG laser.According to suitable parameter, Nd:
YAG laser is applicable not only to the cleaning of rock surface, is equally applicable to the cleaning of metal surface.ASingh uses nanosecond first
Nd:YAG laser cleans golden film carbon layer on surface, and cleans front and rear golden film surface shape by atomic force microscope observation
Looks, it is found that wash the reduction of rear surface roughness and carbon-coating is removed.HLee have studied the corrosion layer of gold plated copper product surface by Nd:
Pattern change after YAG laser cleanings, it is found that cleaning rear surface is there occurs slight change, but corrosion layer is successfully removed.Separately
Outside, AKumar uses Nd:YAG pulse lasers successfully eliminate ThO2 of tungsten belt surface oxide film and Zr alloy surface
Grain, removal when finding to use fundamental (1064nm) and third harmonic (355nm) to Zr alloy surface ThO2 particles are most effective.
In embodiments herein, please refer to Fig.3, the controller 20 includes：First determining device 202, for judging
Whether the first output parameter of the laser meets the first preset condition；First actuator 201, in the laser
When first output parameter meets the first preset condition, the first predetermined registration operation is performed to the laser.First output parameter can be with
It is that optical maser wavelength, energy density, repetition rate, sweep speed or electrochemical potential are to the absorption coefficient of light.First predetermined registration operation can
To be thermoelastic effect.
Specifically, rust is steel product and its general designation of the rotten candle product of alloy, is hydrous ferric oxide Fe203_nH20, oxygen hydrogen
The mixture of iron oxide FeO (OH), oxygen iron oxide Fe (0H) 3 and other iron oxides.Iron of the rusty scale on surface to lower floor
Matter substrate does not have protective effect, this is because in wet condition, oxygen and vapor can be easily by luring the hole of layer
Gap and interaction occurs with substrate iron and generates new rusty scale, as time goes by, the degree for the candle that becomes rusty can constantly deepen.It is existing
Research include：Laser explores influence for the effect that derusts with parameter on laser etc. except the mechanism embroidered, by changing optical maser wavelength, energy
The influence of metric density, repetition rate, sweep speed, electrochemical potential to the absorption coefficient of light etc., tests and determines away rust by laser effect, effect
The change of rate.
For, by heating the iron oxide layer of generation, N.Chaoui etc. proposes going for the type oxide skin(coating) on pure iron
Except mechanism：
Several laser pulses preceding first act on oxide layer surface, oxide skin(coating) crack is occurred, it is small to split into fritter
The oxide layer fragment of block；
Then post laser pulses generation solution adhesive attraction, overcomes the adhesion between each oxide layer fragment and substrate, makes
Oxide layer is sheet of to come off from substrate surface.
Other metal oxides, such as Al203, Cr203, and Zr02Deng passing through chemical vapor deposition or physical gas-phase deposite method
The thin layer that thickness reaches 1 micron is prepared into substrate surface, their removal mechanisms at work is thermoelastic effect (thermoelastic
effect)。
Long Pulse LASER (nanosecond pulse) irradiates metal or other surfaces of solids, and it is solid to make material that gasification occur by heating
The main mechanism of body quality of materials migration (mass transfer).
Laser energy is absorbed by IE materials, causes the rise of target material surface temperature, if laser energy density is sufficiently strong, offers sacriffices to the gods or the spirits of the dead material
Temperature can reach the fusing point of material, even more than molten point reaches the boiling point of material, make surface occur dissolving, even gasification it is existing
As.Therefore above-mentioned laser heating process, which makes material that gasification occur, needs laser energy density to reach specific threshold.
In embodiments herein, please refer to Fig.4, the controller 20 includes：Second determining device 203, for judging
Whether the second output parameter of the laser meets the second preset condition；Second actuator 204, in the laser
When second output parameter meets the second preset condition, the second predetermined registration operation is performed to the laser.Second output parameter can be with
It is laser pulse width, the second predetermined registration operation can be barometric gradient, thermal-elastic expansion, quick thermal explosion, plasma generation
Or fast gasification and slow gasification.
Specifically, heat wave (thermal wave), i.e. temperature field have one section of considerable time, and (laser pulse width is measured
Level, for nanosecond pulse, that is, several to dozens of nanoseconds, for ultrafast pulse) can to target internal communication,
The larger deliquescent layer in one piece of region is produced on IE materials surface.Pulse width is in several nanoseconds to hundreds of micro- laser ablation mechanism
It has been well studied.According to laser energy density and the difference of pulse width, there are six main burning candle passages：Respectively press
Power gradient, thermal-elastic expansion, quick thermal explosion, plasma generation, fast gasification and slow gasification etc..
In embodiments herein, Fig. 5 is refer to, the controller 20 includes：First simulation unit 205, for pair
Temperature change when removing metal oxide is emulated；First result unit 206, for determining the first of the first simulation unit
Simulation result；Second simulation unit 207, for remove metal oxide when surface displacement change emulate；Second knot
Fruit unit 208, for determining the second simulation result of the second simulation unit；And the 3rd actuator 209, for according to described
The simulation result of one simulation unit, second simulation unit, the laser ablation degree execution the 3rd to the laser are default
Operation.3rd predetermined registration operation can carry out away rust by laser layered mode according to simulation result.
By observing two phenomenons：
First, at the initial stage (preceding several pulses, are cleaned completely but without realizing) of cleaning, by collecting laser cleaning mistake
Unrestrained embroidery powder afterwards, and weigh, it is found that the mass loss with sample differs；
Second, (gradually it can be seen that there is the steel-based bottom of metallic luster) at the end of cleaning proceeds to and approaches, it is identical
Under laser energy density, cleaning efficiency can raise (the rust silty amount disposed in the unit interval has increase).
Two phenomenons observed in being tested based on more than, propose the hierarchical mode that rust candle removes in the present embodiment,
And the temperature change of laser action process, surface displacement are changed using ANSYS softwares and emulated, propose point of away rust by laser
Layer mechanism.
As preferred in the present embodiment, the laser ablation degree is used to establish hierarchical mode to the metal oxide
Carrying out layered shaping includes：First layer, the second layer and third layer, for as rusty scale；4th layer, for as steel-based bottom
Layer.
Specifically, propose that a kind of hierarchical mode carrys out the physical mechanism of bed-by-bed analysis away rust by laser in the embodiment of the present application.Always
Share four layers, first, second and third layer is all rusty scale, and the 4th layer is steel basalis, and first and second layer is pulse laser in rusty scale
Thermal diffusion caused by heat affected area, the line of demarcation between them is the isopleth of rusty scale decomposition temperature；Third layer is the non-shadow of heat
Ring area.With one layer, two layers of gradual removal, three layers of thickness gradually reduces, and there are the remaining of specific thicknesses to embroider layer, this
When through the laser energy part of rusty scale have reached the cleaning threshold that laser cleaning floats rusty scale, corresponding washing moulding can be with
Simplified.
It is known as pulse heat affected area by first and second layer in the application, this region exists with the successively burning candle of pulse laser
Gradually passage, the i.e. line of demarcation of heat affected area and the non-zone of influence are gradually moving down downwards.In the initial period of cleaning, laser
Load is loaded on the upper surface of heat affected area as heat flow density：
Here it is effective absorptivity on rusty scale surface, experimental measurements are about 0.2,/ be laser peak power density, h
It is respectively the thickness of the thickness and steel basalis of embroidering layer with d.
It is being gradually reduced with the numerical value of the progress h of cleaning, but is being still the upper of whole system from the perspective of coordinate transform
Surface, the occurrence of h only influence the loading position of heat flow density load, do not influence the temperature field point of material caused by laser heating
Cloth.
When cleaning, which proceeds to, to draw to an end, away rust by laser enters the third layer of four layer models, at this moment by residue
Third layer embroider layer and basalis composition one and simplify two-layer system.Under these conditions, incident laser energy will be divided into three
Point, Part I is reflection, and unhelpful to cleaning, Part II is absorbed by thin rusty scale, and Part III is through thin embroidery layer by steel-based
The top layer at bottom absorbs, and embodies two kinds of cleaning mechanism --- competitions between top layer ablation and boundary layer thermal expansion.Heat flow density carries
Lotus loading is two positions, on the top layer of rusty scale:
In rusty scale and the boundary layer of metallic substrates:
Here T is the thin transmitance for luring layer, and concrete numerical value is related with the thickness of rusty scale, and the numerical value experimentally measured exists
Between 0.2-0.6.The relevant parameter of laser beam is wavelength 1064nm, pulse width 10ns, single pulse energy lOOmJ, hot spot
Half 2.5mm.
First and second layer of removal mechanisms at work：
The pocket that the controller 20 chooses rusty scale surface in ANSYS establishes physical model, carries out emulation meter
Calculate.Physical model is one 50 nanometers * 1 micron of rectangle, carries out two-dimension analysis, uses the unit pair that linear dimension is 4x=lnm
Physical model carries out mesh generation.For transient analysis, need to meet between initial time step and unit linear dimension ensuing
Equation:
Laser pulse is chosen in the selectable range for the time step that above formula determines, in the application to load as heat flow density
In the upper surface of rusty scale:
Due to the pulse width very little of laser, and the heat flow density that laser produces is very big, in this lasting section of laser pulse
Time, the heat convection of upper surface are ignored.Similar, compared to the peak power density of laser, layer is embroidered by solid-state through liquid
Finally it is changed into latent heat of phase change (including dissolving latent heat and gasification latent heat) needed for gaseous state also very little, also neglects here.
The temperature rise on rusty scale most top layer is very big, but is also very fast with the decay of the increase temperature of depth
's.It is if without considering the phase transition process of material in the application, i.e., temporary in the application when the temperature of material exceedes molten point, boiling point
Corresponding physical change occurs in it to Shi Burang, and continues to observe its follow-up developments, when a certain process (such as PULSE HEATING) is tied
Shu Shi, then occur to change (phase change delay hypothesis) accordingly.The temperature on rusty scale most top layer is up to nearly 200,000 degrees Celsius of this orders
The ultra-high temperature of people's shock, and the temperature rise process temperature-time relationship on top layer is approximately a straight line, this is because embroidering the thermal conductivity of layer
Coefficient only has 0.001, and most of laser energy deposition does not carry out conduction dissipation also on rusty scale surface in a short time.
After rusty scale reaches its molten point (being to decompose transformation temperature in fact), material is decomposed, and generates 02 He of gaseous material
Fe304, also can be by FC during the release of oxygen3O4Taken away from original rusty scale surface.And temperature exceedes the part of molten point, by
In luring layer to have occurred and that decomposition at this time, so the curve of follow-up characterization iron oxide temperature change will no longer be of practical significance.
The controller 20 searches the depth value that correspond to rusty scale decomposition temperature in the cell list of ANSYS, only about
5nni.To this shallow-layer iron oxide that thickness is 5nm, due to the release of pyrolysis and oxygen, cause what is be collected into
The quality of rust powder is less than the mass loss of sample entirety.Here it is occur first in the cleaning experiment mentioned in technical background
The physical cause of phenomenon.It is more than the region of 5nm in depth, although can not directly reach the decomposition temperature of rusty scale, by
Acted in thermal diffusion, still there is a degree of temperature to raise.This partial heat energy is insufficient to allow iron oxide to dissolve decomposition, still
Due to the loose and porous structure of rusty scale itself, air is full of in hole, and these air are incited somebody to action under the heat affecting of high temperature rusty scale
Expand, the rise of local gas pressure intensity, when pressure is enough to overcome the combination power between rusty scale, the secondary top layer of rusty scale will be sent out
Raw broken decomposition, i.e. phase explosion phenomenon.
The away rust by laser dissolved the broken decomposition of mutually explosion decomposed with time top layer and constitute laser heat-affected zone on top layer
Main removal mechanisms at work.With the repeated action of multiple-pulse, Pregnantization decompose and it is broken decompose alternately, the thickness of rusty scale also by
It is decrescence small, show as a kind of build-up effect and successively burn the feature of candle.
The thin layer-metal bi embroidered simplifies progress that structure operated with laser cleaning and the reduction of rusty scale thickness, works as rusty scale
Thickness be reduced to fraction of laser light energy by directly being absorbed through rusty scale by metallic substrates, can produce enough desorptions
During effect, the main removal mechanisms at work of away rust by laser will change.At this moment only embroidered in the application with the remaining of experiment measurement
The light transmission rate of layer describes the remaining effect embroidered layer and played in whole cleaning process.One piece 1 micron * 2 is selected in basalis
Physical model is established in the rectangular area of micron.Due to being transient analysis, the constraint between similar time step and unit linear dimension
Relation.Preferably, selecting unit line length is zl；C=50nm, and initial time step size is 0.1ns.Residue embroiders layer transmitance
It is related to rusty scale residual thickness, excursion 0.2-0.6, used in emulation residual thickness be 2.5 microns when transmission
Rate 0.6.
In certain embodiments, during laser cleaning, if laser parameter selection is proper, there is not excess molten
Phenomenon, then dissolving for steel surface caused by laser heating is not a kind of cleaning damage phenomenon, can to steel-based bottom some
Special properties are modulated, such as case hardness, anti-rotten candle property and surface raw sugar degree.On the basis of ANSYS heat analysis, according to
Order coupled modes continue thermal-structure coupled field analysis, in the hope of the maximum displacement of steel substrate surface after pulsed laser heating.
If luring the starting kinetic energy that powder particulate obtains to overcome the adhesion potential energy between particulate and substrate, become rusty powder particulate
Substrate surface can be departed from after laser action, this is the energy criterion that laser removes bottom rust：
The parameters such as average speed, iron oxide density, particle radius (half of remaining rusty scale thickness) are substituted into above formula, can be tested
Above formula is demonstrate,proved to set up.
Illustrate after remaining thin rusty scale has certain transmitance, will to embroider by the thermal-elastic expansion mode of substrate
The disposable whole removing of layer is removed.This is also the reason for cleaning efficiency is improved at the end of away rust by laser approaches.
In summary：First layer can absorb directly into the laser energy for being mapped to surface, and make surface temperature in a short time
Degree reaches the heat decomposition temperature of iron oxide and wipingization decomposition occurs；
The second layer belongs to the heat affected area of pulse laser with first layer, but temperature can not be increased to iron oxide
Decomposition temperature, but since iron embroiders loose porous structure, the air in hole due to the heat effect of laser, generate compared with
Strong atmospheric pressure, making embroidery layer, this process is in existing laser cleaning books there occurs broken decomposition, i.e. phase blast process
As laser except the main mechanism embroidered occurs；As the progress of candle is successively burnt in pulse, the thickness of rusty scale is less and less, when embroidery thickness
When degree is smaller, there is fraction of laser light energy to pass through rusty scale and directly be absorbed by the steel-based bottom of lower floor, this is the bottom of rusty scale
As third layer, its cleaning mechanism is burnt to light up by laser is changed into the thermal-elastic expansion of substrate.Due to the decomposition reaction in first layer,
Generate oxygen and cause mass deficit, and the change of mechanism is cleaned in third layer, last bottom rusty scale is passed through once
Thermal-elastic expansion and make entirely to embroider layer and be all removed, realize the raising of cleaning efficiency.
In embodiments herein, the controller 10 is used to control the laser to carry out as follows a kind of or more
Kind operation：Laser burning candle goes division operation；Thermal-elastic expansion goes division operation；What fragmentation was peeled off goes division operation；Vibration pop-up
Go division operation.
It can be seen from the above description that the present invention realizes following technique effect：
Device in the present embodiment, the problem of fever for electric system high voltage isolator contact erosion, carries out laser
The basic research of metal oxide application is removed, the mechanism of action that pulse laser removes metal oxide is disclosed, establishes laser and exist
Line removes system.Effective technological means is provided for hotline maintenance, abatement apparatus operation hidden danger, improves electric power system safety, carry
For good service.
In addition, it further comprises：The microprocess of laser ablation metal oxide is analyzed, discloses laser ablation metal oxide
Physical mechanism.Theoretical based on laser ablation, the Temperature Rising Law of the lower metal of Study of Laser effect and metal oxide, analyzes laser
The influence of the parameters such as energy, laser pulse width.With reference to morphology analysis, the laser ablation mechanism for proposing metal oxide is laser ablation
Physical chemistry effect and elastic vibration effect it is coefficient as a result, selection and online removal technology for laser technical parameters
Foundation is provided.Structure is adapted to the online of electric power application demand to remove system, analyzes laser ablation degree in real time.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
Performed in computer system, although also, show logical order in flow charts, in some cases, can be with not
The order being same as herein performs shown or described step.
According to embodiments of the present invention, a kind of laser ablation system for being used to implement above-mentioned remote online defect expressivity is additionally provided
System, as shown in fig. 6, the system includes：The remote online defect expressivity device and management server 300, the management clothes
Business device 300, for using BiDoseResp models, analysis peak of luminous intensity and the relation for acting on laser energy, calculates and treats
Remove the critical data of oxide-base bulk damage energy value；The remote online defect expressivity device, for receiving the management
The remote control commands of server, and perform and go division operation.The management server 300 is realized using customization laser and gone online
Except system.Using BiDoseResp models, analysis peak of luminous intensity and the relation for acting on laser energy, calculate matrix damage
The critical datas such as energy value, verify laser ablation mechanism, and provide foundation for the selection of technological parameter.Preferably, according to control
20 Surface Quality assessment result of device, with reference to orthogonal test and optimize technique, obtains optimal procedure parameters.In the embodiment of the present application
Laser ablation system cost it is low, easy to operate, stability is good, the use condition such as low to platform and environmental requirement, be that electric power should
With to the online requirement for removing system.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Performed in the storage device by computing device, either they are fabricated to respectively each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention be not restricted to it is any specific
Hardware and software combines.
The foregoing is merely the preferred embodiment of the application, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
- A kind of 1. remote online defect expressivity device, it is characterised in that including：Laser, for removing metal oxide；Controller, for controlling the laser ablation degree of the laser, wherein, the laser ablation degree is used for the gold Belong to oxide and establish hierarchical mode progress layered shaping；AndThe controller controls the laser to carry out hot line job during defect expressivity.
- 2. remote online defect expressivity device according to claim 1, it is characterised in that the laser and the control Device is connected by wireless or wired mode.
- 3. remote online defect expressivity device according to claim 1, it is characterised in that the laser includes：Nd: YAG laser.
- 4. remote online defect expressivity device according to claim 1, it is characterised in that the controller includes：Whether the first determining device, the first output parameter for judging the laser meet the first preset condition；First actuator, for the laser the first output parameter meet the first preset condition when, to the laser Perform the first predetermined registration operation.
- 5. remote online defect expressivity device according to claim 1, it is characterised in that the controller includes：Whether the second determining device, the second output parameter for judging the laser meet the second preset condition；Second actuator, for the laser the second output parameter meet the second preset condition when, to the laser Perform the second predetermined registration operation.
- 6. remote online defect expressivity device according to claim 1, it is characterised in that the controller includes：First simulation unit, for being emulated to temperature change when removing metal oxide；First result unit, for determining the first simulation result of the first simulation unit；Second simulation unit, for remove metal oxide when surface displacement change emulate；Second result unit, for determining the second simulation result of the second simulation unit；And3rd actuator, for the simulation result according to first simulation unit, second simulation unit, to the laser The laser ablation degree of device performs the 3rd predetermined registration operation.
- 7. remote online defect expressivity device according to claim 1, it is characterised in that the laser ablation degree is used for Hierarchical mode progress layered shaping is established to the metal oxide to be included：First layer, the second layer and third layer, for as rusty scale；4th layer, for as steel basalis.
- 8. remote online defect expressivity device according to claim 1, it is characterised in that the laser, for removing The metal oxide of high voltage isolator contact；The controller, for controlling physical chemistry of the laser according to laser ablation The removal metal oxide of effect and elastic vibration effect.
- 9. remote online defect expressivity device according to claim 1, it is characterised in that the controller is used to control institute State laser and carry out following one or more kinds of operations：Laser burning candle goes division operation；Thermal-elastic expansion goes division operation；What fragmentation was peeled off goes division operation；Division operation is gone in vibration pop-up.
- A kind of 10. laser ablation system, it is characterised in that including：Such as claim 1-9 any one of them remote online defects Cancellation element and management server,The management server, for using BiDoseResp models, analysis peak of luminous intensity and the pass for acting on laser energy System, calculates the critical data of oxide-base bulk damage energy value to be removed；The remote online defect expressivity device, for receiving the remote control commands of the management server, and performs removal Operation.
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