CN103809618B - A kind of drawing process applies method and the device thereof of the on-line automatic control of diameter - Google Patents
A kind of drawing process applies method and the device thereof of the on-line automatic control of diameter Download PDFInfo
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- CN103809618B CN103809618B CN201410038630.8A CN201410038630A CN103809618B CN 103809618 B CN103809618 B CN 103809618B CN 201410038630 A CN201410038630 A CN 201410038630A CN 103809618 B CN103809618 B CN 103809618B
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Abstract
The present invention relates to optic fibre manufacturing technology field, particular for wet to wet coating process, be specifically related in a kind of drawing process apply method and the device thereof of the on-line automatic control of diameter.It includes that undercoating diameter control and outer coating diameter control, by caliper online feedback undercoating diameter, outer coating diameter to PLC, PLC coating cup temperature, interior painting pressure, He flow or outer coating cup temperature, outer painting pressure, outer coating material temperature degree in controlling according to undercoating diameter, outer coating diameter.The present invention passes through caliper online feedback undercoating diameter and outer coating diameter to PLC, by PLC on-line control and control, the stability of fibre coating diameter is greatly improved, optical fiber ectonexine coating diameter is fluctuated in narrower scope, the production efficiency and acquisition high quality optical fiber improving optical fiber is had great importance.
Description
Technical field
The present invention relates to optic fibre manufacturing technology field, particular for wet to wet coating process, be specifically related to one
Drawing process applies method and the device thereof of the on-line automatic control of diameter.
Background technology
Along with the construction of " broadband China " implementation and 4G network is carried out, the market need to optical fiber
The amount of asking will be significantly increased, and optical fiber industry will gradually take a turn for the better by basic side, and form explosive growth.In the face of powerful
The market demand, Ge great optical fiber producer competitively improves production technology, improves production efficiency, accounts for increasing market
There is rate.The method improving production efficiency common has two kinds: 1. use large-sized preform to carry out wire drawing；
2. drawing speed is improved.But when improving drawing speed, usually can be excessive with string diameter fluctuation, cooling is not
Foot, the series of process problem such as internal flaw increase.So, the most acquired under higher drawing speed
Stable high quality optical fiber can just become a very important major issue in fiber manufacturing.
High-quality optical fiber requires have high accuracy and more stable external diameter, high mechanical strength, low decay,
Defect that also will be the fewest.Coated technique has decisive influence for the precision and stability of fibre external diameters,
Meanwhile, overlay diameter also has the biggest impact to the various performances of optical fiber, such as microbending loss performance, ring
Border test performance, peeling force performance and tinctorial property etc..Especially for some small diameter fiber, as
G.657 the non-sensitive optical fiber of bending of 200um, thus need inside and outside painting during preparation high quality optical fiber
Deposited diameter carries out the strictest control.
Multiple technological parameters of drawing optical fibers can produce impact to the coating diameter of optical fiber, such as drawing speed, cold
But the He throughput of pipe, is coated with pressure and the coating cup temperature etc. of dressing.At present to fiber coating layer diameter
Adjusting is mostly to use single technological parameter to be adjusted, and mostly adopts manually.This single
Parameter or the mode manually adjusted would generally produce substantial amounts of technique and Cost Problems: as applied in drawing process
Layer diameter fluctuation is excessive, and He gas usage amount is excessive.
Summary of the invention
For not enough present on prior art, the present invention provide one can on-line automatic adjustment and control,
Coating is stable, it is on-line automatic to apply diameter in the drawing process little, production efficiency is high, optical fiber quality is good that fluctuates
The method controlled and device thereof.
To achieve these goals, the present invention is to realize by the following technical solutions:
In a kind of drawing process apply the on-line automatic control of diameter method, it include undercoating diameter control and
Outer coating diameter controls, by caliper online feedback undercoating diameter, outer coating diameter to PLC, when interior
When coating diameter, outer coating diameter are equal with desired value, then the condition maintaining setting is constant；When undercoating is straight
When footpath is less than or greater than desired value, PLC controls interior coating cup temperature, interior painting pressure successively according to undercoating diameter
Power, He flow or He flow, interior painting pressure, interior coating cup temperature online regulation undercoating diameter；When outward
Coating diameter less than or greater than desired value time, PLC control successively according to outer coating diameter outer coating cup temperature,
Outer painting pressure, outer coating material temperature degree on-line control outer coating diameter.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described undercoating is straight
When footpath is less than desired value, it is slowly increased interior coating cup temperature with certain homoiothermic step-length, often increases a homoiothermic
Step-length all needs to wait for certain constant temperature interval；When interior coating cup temperature increases to higher limit and undercoating diameter still
During less than desired value, then in setting, coating cup temperature is as higher limit, and is coated with pressure in improving with certain step-length voltage regulating
Power, often increases a step-length voltage regulating and all needs to wait for certain constant voltage interval；When interior painting pressure brings up to higher limit
And undercoating diameter still less than desired value time, then set in coating cup temperature as higher limit, interior painting pressure as upper
Limit value, and the He flow of cooling tube is increased with certain flow steps, often increase a flow steps and be both needed to
Wait certain chilling room every, increase further undercoating diameter, to reach desired value.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described undercoating is straight
When footpath is more than desired value, gradually reduces the He flow of cooling tube with certain flow steps, often reduce one
Flow steps all need to wait for certain chilling room every；When the He flow of cooling tube be reduced to zero and undercoating straight
When footpath is still greater than desired value, then set the He flow of cooling tube as zero, and with certain step-length voltage regulating progressively
It is coated with pressure in reducing, often reduces a step-length voltage regulating and all need to wait for certain constant voltage interval；When interior painting pressure subtracts
Little to lower limit and undercoating diameter still greater than desired value time, then set the He flow of cooling tube as zero, interior
Painting pressure is lower limit, and gradually reduces interior coating cup temperature with certain homoiothermic step-length, often reduces a tune
Temperature step-length all needs to wait for certain constant temperature interval, reduces undercoating diameter further, to reach desired value.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described homoiothermic step-length
It it is 0.5～1 DEG C；Step-length voltage regulating is 0.2～0.8bar；Described flow steps is 0.1～0.8L/min.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described constant temperature interval
For 2min；Constant voltage is spaced apart 30s；Chilling room is divided into 1min.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described external coating is straight
When footpath is less than desired value, it is gradually increased outer coating cup temperature with certain homoiothermic step-length, often increases a homoiothermic
Step-length all needs to wait for certain constant temperature interval；When outer coating cup temperature increases to higher limit and outer coating diameter still
During less than desired value, then set outer coating cup temperature as higher limit, and improve with certain step-length voltage regulating and outer be coated with pressure
Power, often increases a step-length voltage regulating and all needs to wait for certain constant voltage interval；When outer painting pressure brings up to higher limit
And outer coating diameter still less than desired value time, then set outer coating cup temperature as higher limit, outer painting pressure as upper
Limit value, and increase outer coating material temperature degree with certain material temperature step-length, often increase a material temperature step-length and all need to wait for
Certain control interval, increases outer coating diameter further, to reach desired value.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described external coating is straight
When footpath is more than desired value, gradually reduces outer coating cup temperature with certain homoiothermic step-length, often reduce by a homoiothermic
Step-length all needs to wait for certain constant temperature interval；When outer coating cup temperature is reduced to lower limit and outer coating diameter still
During more than desired value, then set outer coating cup temperature as lower limit, and progressively reduce with certain step-length voltage regulating
Outer painting pressure, often reduces a step-length voltage regulating and all needs to wait for certain constant voltage interval；When outer painting pressure is reduced to
When lower limit and outer coating diameter are still greater than desired value, then set outer coating cup temperature as lower limit, outer painting pressure
Power is lower limit, and gradually reduces outer coating material temperature degree with certain material temperature step-length, often reduces a material temperature step
Length all needs to wait for certain control interval, reduces outer coating diameter further, to reach desired value.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described homoiothermic step-length
It it is 0.5～1 DEG C；Step-length voltage regulating is 0.1～0.6bar；Described material temperature step-length is 0.3～0.8 DEG C.
The method applying the on-line automatic control of diameter in above-mentioned a kind of drawing process, its described constant temperature interval
For 2min；Constant voltage is spaced apart 30s；Control interval is 1min.
A kind of drawing process applies diameter on-line automatic control device, include successively fiber drawing furnace, cooling tube,
Interior coating cup, outer coating cup, UV lamp and regulating wheel, take-up pulley, its described cooling tube outlet arranges naked
Optical fiber calliper gauge, arranges overlay diameter tester, described coating between described UV lamp and regulating wheel
Layer diameter tester be connected with PLC signal input part, PLC signal output part respectively with cooling tube, interior painting
Apply cup, outer coating cup is connected.
Beneficial effect:
The present invention by caliper online feedback undercoating diameter and outer coating diameter to PLC, by PLC root
Control interior coating cup temperature, interior painting pressure, He flow according to undercoating diameter, outer coating diameter or apply outward
Cup temperature, outer painting pressure, outer coating material temperature degree, reach on-line control and control, and this method is greatly improved
The stability of fibre coating diameter so that optical fiber ectonexine coating diameter fluctuates in narrower scope, for
The production efficiency and the acquisition high quality optical fiber that improve optical fiber have great importance.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the accompanying drawings with detailed description of the invention；
Fig. 1 is the structural representation of apparatus of the present invention.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and be easy to understand with effect,
Below in conjunction with detailed description of the invention, the present invention is expanded on further.
With under the drawing speed of 2000m/min, produce G.652 as a example by optical fiber.In order to produce qualified light
Fine (, in the range of 190 ± 10 μm, outer coating diameter is in the range of 245 ± 10 μm for undercoating diameter),
Being coated with pressure initial value in generally setting is 50 DEG C as 6bar, interior coating cup initial value, and He flow initial value is
6L/min, outer painting pressure initial value is 6.5bar, and outer coating cup temperature initial value is 52 DEG C, at the beginning of coating material temperature
Initial value is 47.5 DEG C, but the inside and outside coating diameter of optical fiber still can produce fluctuation, and the scope of its fluctuation is respectively
For: 184～197 μm, 238～253 μm.
With reference to Fig. 1, with concrete example this scheme of the invention will be described below:
Assembly of the invention includes fiber drawing furnace 2, cooling tube 3, interior coating cup 5, outer coating cup 6, UV successively
Lamp 7 and regulating wheel 9, take-up pulley 11, cooling tube 3 outlet arranges bare fibre caliper 4, UV lamp 7 with
Arranging overlay diameter tester 8 between bearing up pulley 9, described overlay diameter tester 8 is believed with PLC10
Number input is connected, PLC10 signal output part respectively with cooling tube 3, interior coating cup 5, outer coating cup 6 phase
Even.
Its drawing process is: prefabricated rods 1 is under 2000 DEG C of high temperature actions of fiber drawing furnace 2, under melting to freely
Pendant state, by the effect of pull strength, is pumped into bare fibre, and bare fibre, after cooling tube 3 is lowered the temperature, passes through
The coating of application system, UV lamp 7 solidifies, and air cools down, and then under the effect of regulating wheel 9, is wrapped in
On take-up pulley 11, complete wire drawing.
Embodiment 1
When coating cup temperature T1 in a diameter of 185.5 μm of undercoating that caliper 8 records, PLC10 regulation,
It is gradually increased with the step-length of 1 DEG C, often increases the 2min such as step-length need after temperature stabilization, be further added by T1.
Along with the increase of interior coating cup temperature, undercoating diameter also becomes larger.Reach when T1 increases to 60 DEG C
Limit value, now a diameter of 186.3 μm of undercoating, stop increasing, and T1 maintains 60 DEG C.If continuing to increase
Coating will be caused to wield influence in a large number coating effect.Then, it is coated with pressure P1 with 0.2bar step-length in improving,
Often increase the 30s such as step-length need after pressure stabilisation, be further added by P1, when P1 brings up to 8bar, reach
To interior painting upper pressure limit, in stopping increasing, it is coated with pressure, if continuing to increase coating will overflow mould, now
A diameter of 188.4 μm of interior painting of optical fiber, the most not up to desired value.He air-flow is reduced with the step-length of 0.1L/min
Amount, often increase the 1min such as step-length need until L stably after, be further added by, when He throughput L increases to
During 7.5L/min, desired value 190 μm of undercoating diameter.
Embodiment 2
When a diameter of 196.2 μm of undercoating that caliper 8 records, PLC10 regulates cooling tube He throughput L,
Gradually decrease He throughput with the step-length of 0.1L/min, often reduce the 1min such as step-length need until L stably after,
Reduce again.Along with the minimizing of L, undercoating diameter is also gradually reduced.When L is reduced to 0, now interior painting
A diameter of 192.7 μm of layer, stop reducing, and L maintains 0, and to be coated with pressure P1 in the reduction of 0.2bar step-length,
Often reduce the 30s such as step-length need until P1 stably after, then reduce, when interior painting pressure is reduced to 4bar, reach
To lower limit, in stopping reducing, it is coated with pressure, now a diameter of 190.8 μm of the undercoating of optical fiber, still miss the mark
Value.Now, coating cup temperature T1 in reducing with the step-length of 1 DEG C, often reduce the 2min such as a step-length and treat T1
After Wen Ding, then reducing, when T1 is reduced to 48 DEG C, undercoating diameter reaches desired value 190 μm.
Embodiment 3
When the outer coating diameter that caliper 8 records is 239.6 μm, PLC10 control, with the step-length of 1 DEG C by
Cumulative add outer coating cup temperature T2, often increase the 2min such as step-length need after T2 temperature, be further added by.With
T2 gradually raises, and outer coating diameter is gradually increased；When T2 reaches 60 DEG C, now outer coating diameter is
240.3 μm, the most not up to desired value, stop increasing T2, set T2 as 60 DEG C, and carry with 0.2bar step-length
The high outer pressure P2 that is coated with, often improves the 30s such as step-length need after outer painting pressure stability, then improves；When P2 reaches
During to 8bar, now outer coating diameter is 243.5 μm, the most not up to desired value, then set P2 as 8bar,
And it is gradually increased outer coating material temperature degree T3 with the step-length of 0.5 DEG C, often increase the 1min such as step-length need and treat T3
After Wen Ding, it is further added by.When T3 increases to 58.5 DEG C, interior painting diameter reaches desired value 245 μm.
Embodiment 4
When the outer coating diameter that caliper 8 records is 251.3 μm, PLC10 control, with the step-length of 1 DEG C by
Decrescence few outer coating cup temperature T2, often increase the 2min such as step-length need until T2 stably after, then reduce.With
The reduction of T2, outer coating diameter is also gradually reduced；When T2 reaches 40 DEG C, now outer coating diameter is
250.4 μm, outer coating diameter is still not up to desired value, then sets T2 as 40 DEG C, and subtract with 0.2bar step-length
Little outer painting pressure P2, when often reducing a step-length 30s such as need until P2 stably after, then reduce；When outer painting pressure
When P2 is reduced to lower limit 4bar, now outer coating diameter is 247.6 μm.Outer coating diameter is still not up to mesh
Scale value, then set P2 as 5bar, and gradually decrease outer coating material temperature degree T3 with the step-length of 0.5 DEG C, often reduce
The 1min such as one step-length need are after T3 is stable, then reduce.When T3 increases to 45.5 DEG C, external coating is straight
Footpath reaches desired value 245 μm.
Being found by substantial amounts of case study, the use present invention can be by the inside and outside coating diameter of G.652 optical fiber
Control respectively in the range of 190 ± 0.5 μm and 245 ± 1 μm, more much lower than present Standard far away,
High quality optical fiber is gone out for high-speed production significant.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.The industry
Skilled person will appreciate that, the present invention is not restricted to the described embodiments, in above-described embodiment and description
The principle that the present invention is simply described described, without departing from the spirit and scope of the present invention, the present invention
Also having various changes and modifications, these changes and improvements both fall within scope of the claimed invention.This
The claimed scope of invention is defined by appending claims and equivalent thereof.
Claims (9)
1. the method applying the on-line automatic control of diameter in a drawing process, it is characterised in that
Control, by caliper online feedback undercoating including undercoating diameter control and outer coating diameter
Diameter, outer coating diameter are to PLC, when undercoating diameter, outer coating diameter are equal with desired value
Time, then the condition maintaining setting is constant；
When undercoating diameter is less than desired value, in PLC controls successively according to undercoating diameter
Coating cup temperature, interior painting pressure, He flow on-line control undercoating diameter, concrete control is such as
Under: it is slowly increased interior coating cup temperature with certain homoiothermic step-length, often increases a homoiothermic step-length
All need to wait for certain constant temperature interval；When interior coating cup temperature increases to higher limit and undercoating is straight
When footpath is still less than desired value, then in setting, coating cup temperature is as higher limit, and walks with certain pressure regulation
It is coated with pressure in long raising, often increases a step-length voltage regulating and all need to wait for certain constant voltage interval；When
When interior painting pressure brings up to higher limit and undercoating diameter still less than desired value, then coating in setting
Cup temperature be higher limit, interior painting pressure be higher limit, and increase cooling with certain flow steps
The He flow of pipe, often increase flow steps all need to wait for certain chilling room every, enter one
Step increases undercoating diameter, to reach desired value；
When undercoating diameter is more than desired value, PLC controls He successively according to undercoating diameter
Flow, interior painting pressure, interior coating cup temperature online regulation undercoating diameter；
When outer coating diameter is less than or greater than desired value, PLC is controlled successively according to outer coating diameter
Make outer coating cup temperature, outer painting pressure, outer coating material temperature degree on-line control outer coating diameter.
A kind of drawing process the most according to claim 1 applies the on-line automatic control of diameter
Method, it is characterised in that described undercoating diameter more than desired value time, with certain stream
Amount step-length gradually reduces the He flow of cooling tube, often reduces by a flow steps and all needs to wait for one
Fixed chilling room every；When the He flow of cooling tube be reduced to zero and undercoating diameter still greater than mesh
During scale value, then set the He flow of cooling tube as zero, and progressively subtract with certain step-length voltage regulating
Little interior painting pressure, often reduces a step-length voltage regulating and all needs to wait for certain constant voltage interval；When interior painting
When pressure is reduced to lower limit and undercoating diameter still greater than desired value, then set the He of cooling tube
Flow is zero, interior painting pressure is lower limit, and gradually reduces interior coating with certain homoiothermic step-length
Cup temperature, often reduces a homoiothermic step-length and all needs to wait for certain constant temperature interval, reduce further
Undercoating diameter, to reach desired value.
A kind of drawing process the most according to claim 1 and 2 applies diameter on-line automatic
The method controlled, it is characterised in that described homoiothermic step-length is 0.5～1 DEG C；Pressure regulation walks
A length of 0.2～0.8bar；Described flow steps is 0.1～0.8L/min.
A kind of drawing process the most according to claim 1 and 2 applies diameter on-line automatic
The method controlled, it is characterised in that described constant temperature is spaced apart 2min；Constant voltage is spaced apart 30s；
Chilling room is divided into 1min.
A kind of drawing process the most according to claim 1 applies the on-line automatic control of diameter
Method, it is characterised in that described outer coating diameter less than desired value time, with certain tune
Temperature step-length is gradually increased outer coating cup temperature, often increases a homoiothermic step-length and all needs to wait for certain
Constant temperature is spaced；When outer coating cup temperature increases to higher limit and outer coating diameter still less than desired value
Time, then set outer coating cup temperature as higher limit, and improve with certain step-length voltage regulating and outer be coated with pressure,
Often increase a step-length voltage regulating and all need to wait for certain constant voltage interval；When outer painting pressure brings up to
When limit value and outer coating diameter are still less than desired value, then set outer coating cup temperature as higher limit,
Outer painting pressure is higher limit, and increases outer coating material temperature degree with certain material temperature step-length, often increases
One material temperature step-length all needs to wait for certain control interval, increases outer coating diameter further, with
Reach desired value.
A kind of drawing process the most according to claim 1 applies the on-line automatic control of diameter
Method, it is characterised in that described outer coating diameter more than desired value time, with certain tune
Temperature step-length gradually reduces outer coating cup temperature, often reduces by a homoiothermic step-length and all needs to wait for certain
Constant temperature is spaced；When outer coating cup temperature is reduced to lower limit and outer coating diameter still greater than desired value
Time, then set outer coating cup temperature as lower limit, and outside progressively reducing with certain step-length voltage regulating
It is coated with pressure, often reduces a step-length voltage regulating and all need to wait for certain constant voltage interval；When outer painting pressure
When being reduced to lower limit and outer coating diameter still greater than desired value, then set outer coating cup temperature as
Lower limit, outer painting pressure are lower limit, and gradually reduce outer painting dressing with certain material temperature step-length
Temperature, often reduces a material temperature step-length and all needs to wait for certain control interval, outside reducing further
Coating diameter, to reach desired value.
7. according to a kind of drawing process described in claim 5 or 6 applies the on-line automatic control of diameter
The method of system, it is characterised in that described homoiothermic step-length is 0.5～1 DEG C；Step-length voltage regulating
It is 0.1～0.6bar；Described material temperature step-length is 0.3～0.8 DEG C.
8. according to a kind of drawing process described in claim 5 or 6 applies the on-line automatic control of diameter
The method of system, it is characterised in that described constant temperature is spaced apart 2min；Constant voltage is spaced apart 30s；
Control interval is 1min.
A kind of drawing process the most according to claim 1 applies the on-line automatic control of diameter
Method, use automaton in drawing process, coat diameter, described in automatically control dress
Put include successively fiber drawing furnace, cooling tube, interior coating cup, outer coating cup, UV lamp and regulating wheel,
Take-up pulley, it is characterised in that: described cooling tube outlet arranges bare fibre caliper, described
Arranging overlay diameter caliper between UV lamp and regulating wheel, described overlay diameter is calibrated
Instrument is connected with PLC signal input part, PLC signal output part respectively with cooling tube, interior coating cup,
Outer coating cup is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038630.8A CN103809618B (en) | 2014-01-27 | 2014-01-27 | A kind of drawing process applies method and the device thereof of the on-line automatic control of diameter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038630.8A CN103809618B (en) | 2014-01-27 | 2014-01-27 | A kind of drawing process applies method and the device thereof of the on-line automatic control of diameter |
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| CN103809618B true CN103809618B (en) | 2016-12-07 |
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| CN104597560A (en) * | 2015-01-12 | 2015-05-06 | 江苏通鼎光电股份有限公司 | Small outer diameter and low loss fiber for air blowing micro cable and manufacture method thereof |
| CN104844017B (en) * | 2015-04-03 | 2017-06-20 | 烽火通信科技股份有限公司 | A kind of method for automatically controlling optical fiber coating diameter, system and optic fibre drawing apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405105A (en) * | 2001-08-03 | 2003-03-26 | 古河电气工业株式会社 | Optical-fiber drawing device and control method thereof |
| CN101630025A (en) * | 2009-07-31 | 2010-01-20 | 南京烽火藤仓光通信有限公司 | Automatic control method of primary coating diameter of optical fiber |
| CN203689166U (en) * | 2014-01-27 | 2014-07-02 | 江苏通鼎光棒技术有限公司 | Coating diameter on-line automatic control device during wire drawing process |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005075664A (en) * | 2003-08-29 | 2005-03-24 | Sumitomo Electric Ind Ltd | Method for drawing optical fiber |
| JP4466036B2 (en) * | 2003-10-15 | 2010-05-26 | 住友電気工業株式会社 | Optical fiber manufacturing method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405105A (en) * | 2001-08-03 | 2003-03-26 | 古河电气工业株式会社 | Optical-fiber drawing device and control method thereof |
| CN101630025A (en) * | 2009-07-31 | 2010-01-20 | 南京烽火藤仓光通信有限公司 | Automatic control method of primary coating diameter of optical fiber |
| CN203689166U (en) * | 2014-01-27 | 2014-07-02 | 江苏通鼎光棒技术有限公司 | Coating diameter on-line automatic control device during wire drawing process |
Non-Patent Citations (1)
| Title |
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| 光纤二层涂覆直径控制分析;鄂友祥;《中国优秀博硕士学位论文全文数据库（硕士）信息科技辑》;20070415(第04期);论文第5-11、28-30页 * |
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