CN105776838A - Equipment and method for conducting PID controlled optical fiber prefabricated rod sintering with laser - Google Patents
Equipment and method for conducting PID controlled optical fiber prefabricated rod sintering with laser Download PDFInfo
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- CN105776838A CN105776838A CN201610118776.2A CN201610118776A CN105776838A CN 105776838 A CN105776838 A CN 105776838A CN 201610118776 A CN201610118776 A CN 201610118776A CN 105776838 A CN105776838 A CN 105776838A
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
- C03B37/0146—Furnaces therefor, e.g. muffle tubes, furnace linings
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Abstract
The invention provides equipment for conducting PID controlled optical fiber prefabricated rod sintering with laser.A pair of laser transmitter and laser receiver are utilized to monitor the sintering situation in real time, therefore the feeding speed of a lifting device is controlled in real time, and transparency of an optical fiber prefabricated rod obtained after sintering is guaranteed.The equipment comprises a muff tube, the outer annular surface of the middle segment of the muff tube is provided with a heater, a heat preservation layer is arranged outside the heater and integrally arranged in an outer layer shell, the top of a loose body is provided with a connection rod, and the loose body is located in the muff tube under the sintering state.The equipment I characterized in that the top end of the connection rod is exposed out of the top of the muff tube, the top of the connection rod is connected with the lifting device, a speed control component of the lifting device is externally connected to a control system, and the pair of laser transmitter and laser receiver are arranged at the positions, corresponding to the heating area of the heater, of the outer walls on the two sides of the outer layer shell.
Description
Technical field
The present invention relates to the technical field of preform sintering, be specially a kind of equipment utilizing laser to carry out PID control preform sintering, present invention also offers the method using this equipment to be sintered preform.
Background technology
In preform manufacture process, generally produce silica dust presoma (or being called loosening body) initially with methods such as OVD, VAD, then loosening body is positioned in sintering furnace, pass into the gas such as chlorine, helium and slough moisture therein and hydroxyl, then proceed to heat up, make loosening body glass chemical conversion preform.Loosening body is loose structure, and density is typically in (0.25-0.6) g/cm3Between, the distribution of cross section upper density, as it is shown in figure 1,1 represents that core density is higher, progressively reduces to outer density, 2 represent that core density is lower than outside, and this Density Distribution of loosening body makes it be very easy to the situations such as pore eliminates not exclusively, transparence is poor occur when vitrification.This is owing to the bubble of the little soft layer of outside density is easily drained, and core bubble is discharged more difficult, if loosening body enters high-temperature region speed, outer surface layer is vitrification first, core air bubble discharging passages is obstructed, and efflux time is elongated, and the bubble velocity of discharge does not catch up with sintering velocity, inside will be closed in, the problem that transparence is poor occurs；Meanwhile, if temperature is too high, surface layer vitrification is too fast, and bubble cannot be discharged equally.Visible sintering velocity is the main cause affecting loosening body transparence effect, and temperature is secondary cause.Fig. 2 is loosening body During Vitrification in vitro schematic diagram, and 3 is connecting rod, and 4 is loosening body, and 5 is vitrified outer layer, and 6 is the core that vitrification speed lags behind outer layer, and 7 is the loosening body after complete vitrification.
Sintering furnace is made up of parts such as quartz glass muffle tube, heater, heat-insulation layer, outer casing, attemperating units.When loosening body sinters, sintering furnace is warming up to about 1500 DEG C, and loosening body slow transits through sintering furnace high-temperature region, is glassed to preform.
Based on noted earlier, loosening body is when sintering, and speed is unsuitable too fast, and temperature is unsuitable too high, transparence problem otherwise easily occurs.For solving transparence problem, it is possible to the loosening body that slows down enters the speed of sintering furnace high-temperature region, but the method can reduce production efficiency, it is unfavorable for saving cost.
Chinese invention patent 200410041908.3 " sintering equipment of a kind of loose body optical fiber prefabricated rod " describes a kind of speed change sintering method to improve preform concentricity, first half section at sintering uses relatively slow sintering velocity, half section uses comparatively faster sintering velocity after sintering, but this patent is not about the statement of loosening body whether transparence problem.According to Chinese invention patent 201310724822.X " sintering method of a kind of preform and equipment ", sintering the method for second half section speed-raising and infeasible, according to its statement, the sintering second half section should reduction of speed.
In order to improve sintering process motility, success rate and saving cost, Chinese invention patent 201310724822.X proposes a kind of way utilizing laser to control sintering process in real time, the method utilizes a pair Laser emission and receptor to monitor sintering situation in real time, if preform transparency declines, cause the power drop that laser pickoff receives, then increase sintering temperature, until laser power rises to preset value, show that preform transparence degree is better, then stop increasing temperature.Preform transparence situation can be carried out monitor in real time by the method, thus being adjusted, reduces the generation of transparence problem.But the method sintering velocity is fixed, it is impossible to improve efficiency；There is a major issue in the method simultaneously: namely detects whether that transparent laser instrument is positioned at outside high-temperature region, when laser instrument detects power drop, this region has moved away from high-temperature region, now improve sintering temperature again, may result in and have already passed through high-temperature region but still undischarged bubble is mothballed in sandwich layer, cause that transparence effect is poor, therefore improve sintering temperature by simple and random laser detector installation site is set, the transparence problem of preform can not be fully solved.
So, it is still necessary to a kind of method and apparatus that can simultaneously ensure transparence in raising sintering efficiency.
Summary of the invention
For the problems referred to above, the invention provides a kind of equipment utilizing laser to carry out PID control preform sintering, it utilizes a pair generating laser and receptor to monitor sintering situation in real time, and then controls the feed speed of lifting device in real time, it is ensured that the transparence of the preform after having sintered.
nullA kind of equipment utilizing laser to carry out PID control preform sintering，Its technical scheme is such that it and includes muffle tube，The stage casing outer ring surface of described muffle tube is provided with heater，The outside of described heater is provided with heat-insulation layer，Described heat-insulation layer is integrally placed in outer casing，The top of loosening body is provided with connecting rod，Described loosening body under sintering state is positioned at the inside of described muffle tube，It is characterized in that: the top of described connecting rod exposes to the top of described muffle tube，The top of described connecting rod connects lifting device，The speed control unit of described lifting device is external in control system，The outer wall of described outer casing both sides is provided with a pair generating laser and laser pickoff corresponding to the heating region position of described heater，Laser emitted by the ejecting end of described generating laser is successively through the outer casing of correspondence position、Heat-insulation layer、Heater、Muffle tube is also finally received by described laser pickoff，Described generating laser、Laser pickoff connects described control system respectively，The power of described generating laser injection、The power that laser pickoff receives is respectively by real-time Transmission to described control system，Described control system is built-in with PID module，The power that PID module is penetrated by comparison generating laser、The difference of the power that laser pickoff receives controls the speed control unit of described lifting device in real time.
Its lower end sidepiece being further characterized by described muffle tube is provided with air inlet, the upper end sidepiece of described muffle tube arranges gas outlet, the top cover of described muffle tube is equipped with sealing lid, and the inner chamber of described muffle tube is stretched in the lower end of described connecting rod after running through described sealing lid；
It is formed with laser between described laser pickoff and emitter and runs through axis, the position that described outer casing runs through axis corresponding to laser is provided through hole, the position that described heat-insulation layer runs through axis corresponding to described laser is provided with thermostable transparent window, the position that the bringing-up section of described heater runs through axis corresponding to described laser is provided through dodging hole, described muffle tube is quartz glass muffle tube, it is ensured that laser runs through axis from generating laser along laser, eventually received by laser pickoff after the loosening body of correspondence position；
Described laser runs through axis and is positioned at the lower section of the described high plane of heater half, and it is 0～300mm that described laser runs through the numerical value being specially L, L between axis and the high plane of described heater half；
Preferably L value is between 150mm～180mm.
A kind of method utilizing laser to carry out PID control preform sintering, it is characterized in that: after loosening body dehydration, a pair generating laser and receptor is utilized to monitor the sintering situation of the loosening body sintered in real time, and then control the feed speed of lifting device in real time, when ensureing that sintering temperature is constant, it is ensured that the transparence of the preform after having sintered.
It is further characterized by putting in muffle tube by loosening body, pass into helium and chlorine, post-heater begin to warm up, arrive 1200 DEG C, start dehydration, discharge reactor off-gas, after dehydration terminates, heater continues to be heated to 1500 ± 10 DEG C, starts sintering, now generating laser sends laser, and power is P1, by outer casing, heat-insulation layer, heater, muffle tube, through transparent loosening body, arriving laser pickoff, the laser power that laser pickoff receives is P2, control intrasystem PID module by real-time comparison P1With P2Size, control in real time the speed control unit of described lifting device, until terminating, heater stops heating, and sintering furnace temperature is recovered to standby temperature, and preparation produces next time；
When sintering, laser transmitter projects power is P1Laser, through the loosening body of transparence, laser pickoff receive, the laser power received is P2, P1And P2Difference be △ P, record in advance loosening body transparence state under power difference P0, P0Compare with △ P, if △ P P0, then illustrating that loosening body transparence effect is poor, it is slack-off that PID module controls decrease speed；If △ is P≤P0, then illustrating that loosening body transparent effect is better, PID module controls decrease speed and accelerates.
After adopting technique scheme, loosening body is put in muffle tube, ventilation afterwards, heating, carry out dehydration, after dehydration terminates, heater continues to be heated to 1500 ± 10 DEG C, and maintains temperature stabilization, starting sintering, generating laser maintains Fixed Time Interval and sends laser afterwards, and power is P1, through transparent loosening body, arriving laser pickoff, the laser power received is P2Power, the difference of the power of laser pickoff reception that PID module is penetrated by comparison generating laser control the speed control unit of described lifting device in real time, until terminating, heater stops heating, sintering furnace temperature is recovered to standby temperature, prepares to produce next time, and it utilizes a pair generating laser and receptor to monitor the sintering situation of the loosening body sintered in real time, and then control the feed speed of lifting device in real time, it is ensured that the transparence of the preform after having sintered.
Accompanying drawing explanation
Fig. 1 is loosening body radial density distribution schematic diagram；
Fig. 2 is Fig. 2 loosening body During Vitrification in vitro schematic diagram；
Fig. 3 is the structural representation of the equipment of the present invention；
In figure, the title corresponding to sequence number is as follows:
Connecting rod 3, loosening body 4, vitrified outer layer 5, vitrification speed lag behind the core 6 of outer layer, complete vitrification after loosening body 7, lifting device 8, seal lid 9, gas outlet 10, heater 11, heat-insulation layer 12, outer casing 13, thermostable transparent window 14, generating laser 15, laser pickoff 16, muffle tube 17, air inlet 18, run through dodge hole 19, the high plane 20 of heater half, laser run through axis 21, control system 22, PID module 23, through hole 24.
Detailed description of the invention
nullA kind of equipment utilizing laser to carry out PID control preform sintering，See Fig. 3: it includes muffle tube 17，The stage casing outer ring surface of muffle tube 17 is provided with heater 11，The outside of heater 11 is provided with heat-insulation layer 12，Heat-insulation layer 12 is integrally placed in outer casing 13，The top of loosening body 4 is provided with connecting rod 3，Loosening body 4 under sintering state is positioned at the inside of muffle tube 17，The top of connecting rod 3 exposes to the top of muffle tube 17，The top of connecting rod 3 connects lifting device 8，The speed control unit of lifting device 8 is external in control system 22，The outer wall of outer casing 13 both sides is provided with a pair generating laser 15 and laser pickoff 16 corresponding to the heating region position of heater 11，Laser emitted by the ejecting end of generating laser 15 is successively through the outer casing 13 of correspondence position、Heat-insulation layer 12、Heater 11、Muffle tube 17 is also finally received by laser pickoff 16，Generating laser 15、Laser pickoff 16 is connection control system 22 respectively，The power of generating laser 15 injection、The power that laser pickoff 16 receives is respectively by real-time Transmission to control system 22，Control system 22 is built-in with PID module 23，The power that PID module 23 is penetrated by comparison generating laser、The difference of the power that laser pickoff receives controls the speed control unit of lifting device 8 in real time.
The lower end sidepiece of muffle tube 17 is provided with air inlet 18, and the upper end sidepiece of muffle tube 17 arranges gas outlet 10, and the top cover of muffle tube 17 is equipped with sealing lid 9, and the inner chamber of muffle tube 17 is stretched in the lower end of connecting rod 3 after running through sealing lid 9；
It is formed with laser between laser pickoff 16 and generating laser 15 and runs through axis 21, the position that outer casing 13 runs through axis 21 corresponding to laser is provided through hole 24, the position that heat-insulation layer 12 runs through axis corresponding to laser is provided with thermostable transparent window 14, the position that the bringing-up section of heater 11 runs through axis 21 corresponding to laser is provided through dodging hole 19, muffle tube 17 is quartz glass muffle tube, it is ensured that laser runs through axis 21 from generating laser 15 along laser, eventually received by laser pickoff 16 after the loosening body 4 of correspondence position；
Laser runs through axis 21 and is positioned at the lower section of the high plane 20 of heater half, and the numerical value being specially L, L that laser runs through between axis 21 and the high plane 20 of heater half is 0～300mm；
Preferably L value is between 150mm～180mm, and this highly can ensure that the transparence degree of the loosening body detected can be controlled in time and adjust, it is ensured that the transparence of whole preform；
Generating laser 15 and laser pickoff 16 are ZM10X type laser diameter measuring instrument, but are not limited to this type laser diameter measuring instrument, and the laser diameter measuring instrument that other manufacturer identical with its function produces all can reach the effect of the present invention；
Material for thermostable transparent window 14 is transparent alumina ceramics, but is not limited to alumina material, and any refractoriness laser more than 1600 DEG C can pass through refractory material all can serve as thermostable transparent window 14.
A kind of method utilizing laser to carry out PID control preform sintering, adopt the equipment of Fig. 3: after loosening body 4 dehydration, a pair generating laser 15 and laser pickoff 16 is utilized to monitor the sintering situation of the loosening body 4 sintered in real time, and then control the feed speed of lifting device 8 in real time, when ensureing that sintering temperature is constant, it is ensured that the transparence of the preform after having sintered
Loosening body 4 is put in muffle tube 17, helium and chlorine is passed into by air inlet 18, post-heater 11 begin to warm up, arrive 1200 DEG C, start dehydration, reactor off-gas is discharged from gas outlet 10, after dehydration terminates, heater 11 continues to be heated to 1500 ± 10 DEG C, starts sintering, now generating laser 15 sends laser, and power is P1, by outer casing 13, heat-insulation layer 12, heater 11, muffle tube 17, through transparent loosening body 4, arriving laser pickoff 16, the laser power that laser pickoff 16 receives is P2, control the PID module 23 in system 22 by real-time comparison P1With P2Size, control in real time the speed control unit of lifting device 8, until terminating, heater 11 stops heating, and sintering furnace temperature is recovered to standby temperature, and preparation produces next time；
When sintering, generating laser 15 transmitting power is P1Laser, through the loosening body 4 of transparence, laser pickoff 16 receive, the laser power received is P2, P1And P2Difference be △ P, record in advance loosening body transparence state under power difference P0, P0Compare with △ P, if △ P P0, then illustrating that loosening body transparence effect is poor, it is slack-off that PID controls decrease speed；If △ is P≤P0, then illustrating that loosening body transparent effect is better, PID controls decrease speed and accelerates.
The lifting speed calculated corresponding to △ P, PID module by formula 1 is obtained by formula 2 calculating:
△ P=P1-P2(formula 1)
V=V0+m(P0-△ P) or V=V0·n·(P0/ △ P) (formula 2)
In above formula: P1For transmitting power, P2For receiving power, V is speed after PID adjusts, V0For initial velocity, P0For initially given comparison power, △ P is actual work rate variance, and m, n are highway speeds transformation ratio, for empirical value.
PID is the meaning of Synchronization Control, the PID module speed of △ P Numerical Implementation Synchronization Control lifting device 8 by feeding back, it is possible to make whole system accurately, stable operation.
Specific embodiment one: see Fig. 3, the laser that generating laser 15, laser pickoff 16 correspondence are formed runs through axis 21 and is positioned at 150mm place below the high plane 20 of heater 11 half, emitter and laser instrument are on same level line, the mean outside diameter that beam width 0.5D d D, D are the loosening body after complete vitrification that generating laser 15 is launched.Initially debug the stage at equipment, generating laser 15 launching a beam power is PaLaser, the loosening body after outer casing 13, heat-insulation layer 12, heater 11, muffle tube 17 and the complete vitrification that arranges to debug, the power that laser pickoff 16 receives is Pb, move up and down, rotate the loosening body after complete vitrification, obtain (Pa-Pb) meansigma methods be initial p0, Coefficient m is determined in debugging, and ensures 1.0mm/min≤V≤8.0mm/min；
After loosening body 4 dehydration completes, heater 11 begins to warm up, and 30min furnace temperature is raised to (1500 ± 10) DEG C, and consolidation step starts, and the energising of generating laser 15, laser pickoff 16 starts, and calculates △ P according to formula 1.Now △ P < P0, it was shown that loosening body 4 not yet arrives laser and runs through axis 21 place, and this stage PID module does not enable, and loosening body 4 is with V0The fixed speed of=3mm/min declines；△ P >=P occurs when first0Time, it was shown that loosening body 4 has arrived laser and has run through axis 21 place, and now PID module starts, and the decrease speed of control system 22 adapter loosening body 4, according to V=V0+m(P0-△ P) rule, PID module controls sintering velocity；
The identification that sintering terminates: when loosening body 4 runs more than 5min continuously with prestissimo, explanation sintering terminates, now PID module exits control, furnace temperature is down to standby temperature at 30min by heater 11, loosening body after complete vitrification proposes muffle tube 17 with the speed of 100mm/min simultaneously, then begins to carry out production next time.
Specific embodiment two
See that Fig. 3, the laser that generating laser 15, laser pickoff 16 correspondence are formed run through axis 21 and be positioned at 180mm place below the high plane 20 of heater 11 half, initially debug the stage at equipment, utilize the method the same with example 1 to determine P0, coefficient n determines in debugging, and ensures 1.0mm/min≤V≤8.0mm/min；
After loosening body 4 dehydration completes, it is lifted up, during most advanced and sophisticated arrival heater 11 half high plane 20, the displacement transducer in lifting device 8 is set to 0, in lifting device 8, is provided with position sensor, detection displacement, heater 11 begins to warm up, and 30min furnace temperature is raised to (1490 ± 20) DEG C, and consolidation step starts, the energising of generating laser 15, laser pickoff 16 starts, and calculates △ P according to formula 1.Now △ P < P0, it was shown that loosening body 4 not yet arrives laser and runs through axis 21 place, and this stage PID module does not enable, and loosening body 4 is with V0The fixed speed of=4mm/min declines；△ P >=P occurs after 45min first0Time, it was shown that loosening body 4 has arrived laser and has run through axis 21 place, and now PID module starts, and the decrease speed of control system 22 adapter loosening body 4, according to V=V0·n·(P0/ △ P) rule, PID controls sintering velocity；
The identification that sintering terminates: the length l of comparison displacement transducer value of feedback l and loosening body0If, l >=l0, then illustrating that sintering terminates, furnace temperature is down to standby temperature at 30min by heater 11, and the loosening body after complete vitrification proposes muffle tube with the speed of (100 ± 20) mm/min simultaneously, then begins to carry out production next time.
Above specific embodiments of the invention are described in detail, but content has been only the preferred embodiment of the invention, it is impossible to be considered the practical range for limiting the invention.All equalizations made according to the invention application range change and improvement etc., all should still belong within the patent covering scope of the present invention.
Claims (8)
- null1. one kind utilizes the equipment that laser carries out PID control preform sintering，It includes muffle tube，The stage casing outer ring surface of described muffle tube is provided with heater，The outside of described heater is provided with heat-insulation layer，Described heat-insulation layer is integrally placed in outer casing，The top of loosening body is provided with connecting rod，Described loosening body under sintering state is positioned at the inside of described muffle tube，It is characterized in that: the top of described connecting rod exposes to the top of described muffle tube，The top of described connecting rod connects lifting device，The speed control unit of described lifting device is external in control system，The outer wall of described outer casing both sides is provided with a pair generating laser and laser pickoff corresponding to the heating region position of described heater，Laser emitted by the ejecting end of described generating laser is successively through the outer casing of correspondence position、Heat-insulation layer、Heater、Muffle tube is also finally received by described laser pickoff，Described generating laser、Laser pickoff connects described control system respectively，The power of described generating laser injection、The power that laser pickoff receives is respectively by real-time Transmission to described control system，Described control system is built-in with PID module，The power that PID module is penetrated by comparison generating laser、The difference of the power that laser pickoff receives controls the speed control unit of described lifting device in real time.
- 2. as claimed in claim 1 a kind of utilize laser carry out PID control preform sintering equipment, it is characterized in that: the lower end sidepiece of described muffle tube is provided with air inlet, the upper end sidepiece of described muffle tube arranges gas outlet, the top cover of described muffle tube is equipped with sealing lid, and the inner chamber of described muffle tube is stretched in the lower end of described connecting rod after running through described sealing lid.
- 3. as claimed in claim 1 or 2 a kind of utilize laser carry out PID control preform sintering equipment, it is characterized in that: be formed with laser between described laser pickoff and emitter and run through axis, the position that described outer casing runs through axis corresponding to laser is provided through hole, the position that described heat-insulation layer runs through axis corresponding to described laser is provided with thermostable transparent window, the position that the bringing-up section of described heater runs through axis corresponding to described laser is provided through dodging hole, and described muffle tube is quartz glass muffle tube.
- 4. as claimed in claim 1 a kind of utilize laser carry out PID control preform sintering equipment, described laser runs through axis and is positioned at the lower section of the described high plane of heater half, it is 0～300mm that described laser runs through the numerical value that distance is L, L between axis and the high plane of described heater half.
- 5. as claimed in claim 4 a kind of utilize laser carry out PID control preform sintering equipment, it is characterised in that: L value is between 150mm～180mm.
- 6. one kind utilizes laser to carry out the PID method controlling preform sintering, it is characterized in that: use a kind of equipment utilizing laser to carry out PID control preform sintering as described in claim 1 to 5 to after loosening body dehydration, the sintering situation of the loosening body sintered is monitored in real time by a pair generating laser and receptor, and then control the feed speed of lifting device in real time, when ensureing that sintering temperature is constant, it is ensured that the transparence of the preform after having sintered.
- 7. as claimed in claim 6 a kind of utilize laser carry out PID control preform sintering method, it is characterized in that: loosening body is put in muffle tube, pass into helium and chlorine, post-heater begin to warm up, arrive 1200 DEG C, start dehydration, discharge reactor off-gas, after dehydration terminates, heater continues to be heated to 1500 ± 10 DEG C, starting sintering, now generating laser sends laser, and power is P1, by outer casing, heat-insulation layer, heater, muffle tube, through transparent loosening body, arriving laser pickoff, the laser power that laser pickoff receives is P2, control intrasystem PID module by real-time comparison P1With P2Size, control in real time the speed control unit of described lifting device, until terminating, heater stops heating, and sintering furnace temperature is recovered to standby temperature, and preparation produces next time.
- 8. as claimed in claim 7 a kind of utilize laser carry out PID control preform sintering method, it is characterised in that: sintering time, laser transmitter projects power is P1Laser, through the loosening body of transparence, laser pickoff receive, the laser power received is P2, P1And P2Difference be △ P, record in advance loosening body transparence state under power difference P0, P0Compare with △ P, if △ P P0, then illustrating that loosening body transparence effect is poor, it is slack-off that PID module controls decrease speed；If △ is P≤P0, then illustrating that loosening body transparent effect is better, PID module controls decrease speed and accelerates.
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Cited By (5)
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| CN108218217A (en) * | 2018-04-11 | 2018-06-29 | 王丽 | A kind of preform for fiber manufacturing manufactures device |
| CN109407109A (en) * | 2018-12-28 | 2019-03-01 | 江苏通鼎光棒有限公司 | A kind of device and its monitoring method being sintered length for monitoring VAD loosening body |
| CN110790501A (en) * | 2019-11-22 | 2020-02-14 | 青海中利光纤技术有限公司 | Sintering device and method for optical fiber preform |
| CN111620557A (en) * | 2020-05-26 | 2020-09-04 | 华能(泰安)光电科技有限公司 | Sintering device and method for loose body of optical fiber preform rod |
| CN112194360A (en) * | 2020-11-16 | 2021-01-08 | 江苏亨通光导新材料有限公司 | Device and method for monitoring whether sintering of optical fiber preform is abnormal |
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| CN103739194A (en) * | 2013-12-25 | 2014-04-23 | 中天科技精密材料有限公司 | Sintering method of optical fiber preform and equipment thereof |
| CN205616786U (en) * | 2016-03-03 | 2016-10-05 | 江苏亨通光电股份有限公司 | Utilize laser to carry out equipment of PID control optical fiber perform sintering |
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| GB2132186A (en) * | 1982-12-22 | 1984-07-04 | Western Electric Co | Improved sintering of optical fiber preforms |
| CN103739194A (en) * | 2013-12-25 | 2014-04-23 | 中天科技精密材料有限公司 | Sintering method of optical fiber preform and equipment thereof |
| CN205616786U (en) * | 2016-03-03 | 2016-10-05 | 江苏亨通光电股份有限公司 | Utilize laser to carry out equipment of PID control optical fiber perform sintering |
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|---|---|---|---|---|
| CN108218217A (en) * | 2018-04-11 | 2018-06-29 | 王丽 | A kind of preform for fiber manufacturing manufactures device |
| CN109407109A (en) * | 2018-12-28 | 2019-03-01 | 江苏通鼎光棒有限公司 | A kind of device and its monitoring method being sintered length for monitoring VAD loosening body |
| CN109407109B (en) * | 2018-12-28 | 2024-01-16 | 江苏通鼎光棒有限公司 | Device for monitoring sintering length of VAD loose body and monitoring method thereof |
| CN110790501A (en) * | 2019-11-22 | 2020-02-14 | 青海中利光纤技术有限公司 | Sintering device and method for optical fiber preform |
| CN111620557A (en) * | 2020-05-26 | 2020-09-04 | 华能(泰安)光电科技有限公司 | Sintering device and method for loose body of optical fiber preform rod |
| CN112194360A (en) * | 2020-11-16 | 2021-01-08 | 江苏亨通光导新材料有限公司 | Device and method for monitoring whether sintering of optical fiber preform is abnormal |
| CN112194360B (en) * | 2020-11-16 | 2023-10-10 | 江苏亨通光导新材料有限公司 | Device for monitoring abnormal sintering of optical fiber preform and monitoring method thereof |
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Application publication date: 20160720 |