CN1060910A - Optical fiber soot synthesis apparatus - Google Patents

Optical fiber soot synthesis apparatus Download PDF

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Publication number
CN1060910A
CN1060910A CN91109143A CN91109143A CN1060910A CN 1060910 A CN1060910 A CN 1060910A CN 91109143 A CN91109143 A CN 91109143A CN 91109143 A CN91109143 A CN 91109143A CN 1060910 A CN1060910 A CN 1060910A
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mentioned
optical fiber
soot
fiber soot
rod
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CN91109143A
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CN1030591C (en
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三上俊宏
香村幸夫
石田祯则
野神明
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Furukawa Electric Co Ltd
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Furukawa Electric Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

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Abstract

A kind of optical fiber soot synthesis apparatus, in order not to be subjected to the influence of the weight of rotary drive mechanism as far as possible, detect the rotating weight of planting rod and optical fiber soot of sensor determination with the soot weight that is arranged in the divided a pair of kind rod support rotary drive mechanism, and operation control device is only to calculate in real time from the quality of the optical fiber soot of this gravimetry through having synthesized after the calculation process on kind of rod.Operation control device carries out the synthetic control of optical fiber soot according to the quality of calculating.

Description

Optical fiber soot synthesis apparatus
The present invention relates to the manufacturing installation of fibre parent material, relate in particular to around the kind rod that constitutes the optical fiber heart with the correct quality synthetic fibre-optical soot (optical fiber soot synthesis apparatus of Off ア イ バ ス-ト).
Optical fiber is by the quartz glass heart and be formed on around this heart, and the covering of the quartz glass that its flexion rate is lower than the heart constitutes.
When making optical fiber, at first constitute the part of the heart, form kind of a rod by vitrifacation again by the VAD manufactured.Then, the synthetic optical fiber soot that constitutes covering around kind of rod.The synthetic of this optical fiber soot carries out as follows, promptly to the synthetic silicon tetrachloride (Sicl that is provided as the optical fiber soot material with jet pipe under control of quality of soot 4) gas and as the hydrogen and the oxygen of oxyhydrogen flame material, and make it carry out the CVD reaction.Be formed in the fibre parent material that kind of rod forms optical fiber soot on every side in view of the above.
Afterwards, to this fibre parent material add hot wire drawing, when making single-mode fiber, forming diameter is the heart of 10 μ m, the optical fiber of the covering of external diameter 125 μ m.Coated with resin on this optical fiber again.
Because correctly stipulated the ratio of the heart and covering, so be necessary kind of rod is correctly made optical fiber soot.
Before, the method for employing is synthetic in the Halfway Stopping of optical fiber soot synthesis phase; Measure the method for overall weight.Because just know the weight of kind of rod in advance, so, finally can obtain the quality of optical fiber soot if from overall weight, deduct the weight that the weight of kind of rod is just known optical fiber soot.
As the method for other prior art, employing be that fibre parent material is carried out in the vitrifacation engineering, make after the optical fiber soot vitrifacation, measure the ratio of the heart and covering with light instrumentation means, if covering deficiency, then synthetic fibre-optical soot again, if superfluous, then carry out etching method.
When synthesizing when the covering deficiency, because even need of said method heated the covering that in a single day cools off again, therefore the problem that exists is that not only throughput rate is low, and covering can be in the cracky state because of thermal shock again.
When this surrounding layer is superfluous, corrode, then throughput rate descends.
For above-mentioned reasons, strict carry out above-mentioned quality control, time management etc. have been attempted, both there is not surplus so that make, there is not enough optical fiber soot yet, but limit relation because of the range of control of quality control valve, unavoidably the change of quality control can take place, thereby fail to realize accurate quality control.Consequently, even carry out tight time management, also be difficult to make optical fiber with the correct and stable heart/covering ratio.
Open as the spy that clear 63-144139 communique, spy are opened clear 63-285130 communique, the spy opens in clear 63-285131 communique and the flat 2-167838 communique of Te Kai and discloses,, attempting that the weight of optical fiber soot is carried out The real time measure in order to address the above problem.
The spy drives the manufacturing installation of the fibre parent material that is disclosed in the clear 63-144139 communique, be a kind of pedestal to be installed, 2 carriages to be arranged in that this pedestal two is edge-on, and being provided with motor at these tray chambers, motor can make the manufacturing installation of the horizontal type fibre parent material that kind of rod rotates in the horizontal direction.Bottom at pedestal disposes force cell, and this force cell is measured the full weight amount of pedestal and carriage formation one.Usually all weight of these devices is heavy because of having about hundreds of branches jin, thus be necessary to use the load cell of wide measurement range, because of being subjected to the restriction of capacity of decomposition and precision, so can not be with the weight of 100 gram left and right sides precision determination optical fiber soots.
Open in the optical fiber soot synthesis apparatus that is disclosed in the clear 63-285130 communique the spy, thus disclosed a kind of will plant excellent vertical direction hang down, make this kind rod with the vertical direction axle be center rotation and make blowpipe near the excellent lifting of this kind at kind of the manufacturing installation of the fibre parent material of the longitudinal type of excellent synthetic fibre-optical soot.This optical fiber soot synthesis apparatus mainly due to being longitudinal type structure, being subjected to gravity effect and having the synthetic uneven problem of optical fiber soot.In addition, though be to rely on the gravimetry device that is installed in top, measure the kind rod of suspention and the structure of optical fiber soot weight, because of be subjected to rotating kind of rod spool, it bearing, to the influence of the belt of turning axle transmission power etc., and can not correctly measure the weight of kind of rod and optical fiber soot.
The spy opens the optical fiber manufacturing plant material that is disclosed in the clear 63-285131 communique, it is to open the problem that exists in the optical fiber manufacturing plant material that is disclosed in the clear 63-144139 communique in order to solve above-mentioned spy, and be provided with balance bob (the バ テ Application ス ウ エ-ト) and the Construction integration thing of planting excellent rotating mechanism, and be provided with actuator (the ア Network チ エ エ-) of the rotation that detects kind of excellent rotating mechanism in the bottom of kind of excellent rotating mechanism of horizontal ground axle suspension on the top of above-mentioned carriage.Promptly in this optical fiber manufacturing plant material, purpose is only to measure by balance bob the weight of kind of rod and optical fiber soot.But the gravimetry in this optical fiber manufacturing plant material is because be to be the center by the top fulcrum that detects with carriage, balance bob and plant rotatablely moving of excellent rotating mechanism rotation, and converse the weight of optical fiber soot, so can not calculate correct weight.Again because must change angle, so control and mechanism become very assorted according to above-mentioned rotation situation corresponding to the jet pipe of kind of rod.
The optical fiber manufacturing plant material that is disclosed in the Te Kaiping 2-167838 communique is to use and supports the integral body of their mechanism all to utilize the gravimetry device of lever principle planting rod and optical fiber soot and rotation, measures the weight of kind of rod and optical fiber soot.But,,, can not come gravimetry with the high de-agglomeration ability because be the overall weight that detects rotary drive mechanism with Weight measurement device even in this optical fiber manufacturing plant material.Again, the spy opens the labyrinth that the gravimetry device that is disclosed in the flat 2-167838 communique uses lever principle, so problems such as volume is big, price is high, adjustment program complexity are arranged.
In addition, the weight of depending merely on by soot detects the weight that sensor detects, can't correctly obtain the weight of optical fiber soot, also must consider the centre of gravity place etc. of the optical fiber soot of rotation, all fail to edify the weight measurement method that carries out accurate optical fiber soot and above-mentioned prior art is any.
The object of the present invention is to provide a kind of optical fiber soot synthesis apparatus that can correctly detect optical fiber soot weight.
Another object of the present invention is to provide a kind of can be to carry out the optical fiber soot synthesis apparatus of correct gravimetry in real time.
A further object of the present invention is that the optical fiber soot synthesis apparatus that provided can correctly calculate its quality from the weight of the optical fiber soot of said determination.
Another object of the present invention be the optical fiber soot synthesis apparatus that provided can be in the building-up process of optical fiber soot in real time the quality to above-mentioned optical fiber soot of calculating in real time carry out FEEDBACK CONTROL, synthesize high-quality optical fiber soot.
Therefore, according to optical fiber soot synthesis apparatus provided by the present invention, it be a kind of by a kind rod that constitutes the optical fiber heart (comprise as required the part that becomes covering around the heart is carried out the local kind rod that adheres to) thereby and the soot that constitutes the covering on this kind rod synthesize the optical fiber soot synthesis apparatus of making fibre parent material, this device is provided with: and a pair of kind excellent support rotary drive mechanism that make it rotate excellent from both sides horizontal direction support kind; Emit the jet pipe of optical fiber soot raw material and oxyhydrogen flame synthetic fibre-optical soot on this kind rod; Accommodate the shell frame of this jet pipe, kind rod and synthetic fibre-optical soot; Make this jet pipe and above-mentioned kind rod relatively carry out the reciprocating device that horizontal direction moves back and forth; And be arranged on the above-mentioned a pair of inboard separately that rod is supported rotary drive mechanism of planting, measure a pair of Weight measurement device of the weight of the synthetic optical fiber soot of piling up on above-mentioned kind rod and this kind rod.
And above-mentioned kind rod supports that rotary drive mechanism is separated into 2, and constitutes this all rod and support full weight amount of rotary drive mechanism can not add to above-mentioned Weight measurement device.
Above-mentioned kind rod supports that rotary drive mechanism comprises: a pair of axle supporting device that is supporting above-mentioned kind rod from both sides horizontal direction axle; The a pair of axle rotary driving part of the end of above-mentioned each supporting device of axle supporting divides in vertical direction supports a pair of first carriage that this a pair of axle rotary driving part divides; A pair of second carriage that the excellent side of kind in this a pair of first carriage inboard is provided with; Be configured in this a pair of second carriage in each, admit the pair of bearings of above-mentioned a pair of axle supporting device.Above-mentioned a pair of Weight measurement device is installed on above-mentioned a pair of second carriage, in order to measure the weight of the optical fiber soot that forms on kind of a rod, this kind rod, above-mentioned a pair of axle supporting device and above-mentioned pair of bearings.
Each of above-mentioned a pair of axle supporting device, by being coupled between above-mentioned first carriage and second carriage, and formation axle rotary driving part divides and first carriage does not influence above-mentioned Weight measurement device.
Optical fiber soot synthesis apparatus has input from the gravimetry signal of above-mentioned Weight measurement device, the operation control device of calculating the quality that is deposited in the optical fiber soot on the above-mentioned kind rod.
Above-mentioned operation control device when the quality of the optical fiber soot of calculating reaches the desired value of regulation, then stops the synthetic of above-mentioned optical fiber soot.
Above-mentioned operation control device by above-mentioned axle rotary driving part branch, makes the rotation of above-mentioned axle supporting device with two kinds of different angular velocity.2 gravimetries of the above-mentioned Weight measurement device from each angular velocity are calculated the quality that is deposited in the optical fiber soot on the above-mentioned kind rod.
Optical fiber soot synthesis apparatus detects the device of kind of the excellent anglec of rotation in addition.Above-mentioned operation control device according to the value of detecting of this anglec of rotation detection device with based on come leisure differ the above-mentioned Weight measurement device in the excellent position of rotation of above-mentioned kind of 180 degree different weight values of detecting and, calculate the quality of the optical fiber soot of piling up on the above-mentioned kind rod.
Again, above-mentioned kind rod is supported rotary drive mechanism to have from both sides horizontal direction axle and is supported a pair of axle supporting device of above-mentioned kind rod and a pair of axle rotary driving part branch of this each end of supporting device of axle supporting.Above-mentioned a pair of Weight measurement device is installed in the above-mentioned a pair of axle supporting device, in order to measure kind of rod and to plant the weight that rod is gone up the optical fiber soot that forms.
Each of above-mentioned a pair of axle supporting device is coupled between the installation position and the above-mentioned axle rotary driving part of above-mentioned Weight measurement device divide, and makes above-mentioned Weight measurement device not be subjected to an influence of rotary driving part branch.
And above-mentioned kind rod supports that rotary drive mechanism comprises: a pair of inboard bearing portion of subtend configuration; A pair of driving side carriage in the inboard subtend configuration of this inboard bearing portion; A pair of slave end carriage in its inside subtend configuration; The axle supporting device of axle supporting kind of rod between the slave end carriage of this subtend, it is divided into: drive shaft section and driven shaft part; Rotation links the combining mechanism of above-mentioned drive shaft section and driven shaft part freely between above-mentioned driving side carriage and above-mentioned slave end carriage; Respond the suffered weight of above-mentioned slave end carriage, make the visibly moved up and down mechanism that permitted of slave end carriage of above-mentioned slave end carriage lifting; With the rotary drive mechanism that rotates to the transmission of above-mentioned axle supporting device by above-mentioned inboard bearing part.Above-mentioned Weight measurement device is arranged on the visibly moved up and down bottom of being permitted mechanism of above-mentioned slave end carriage.
Preferably a kind of universal coupling of above-mentioned rotating mechanism.
Above-mentioned kind rod is supported rotary drive mechanism, has the guide rail that vertical direction is provided with.The visibly moved up and down mechanism perhaps of above-mentioned slave end carriage makes the lifting of above-mentioned slave end carriage along this guide rail.
Above-mentioned kind rod is supported rotary drive mechanism, has the framework in the vertical direction configuration, and at the turn arm that this framework rotation is being supported by axle freely, on this turn arm the slave end carriage is installed.
Above-mentioned kind rod is supported rotary drive mechanism, has framework in the vertical direction configuration, and on this framework the turn arm that supported by axle freely of rotation, at the balance bob of a distolateral setting of this turn arm, at another distolateral slave end carriage that is installed with of this turn arm.
Above-mentioned kind rod is supported rotary drive mechanism, has at the framework of vertical direction configuration and is fixed on the drag spring on this framework and is connected spring accepting arm on the free end of this drag spring.The other end of this spring accepting arm connects at above-mentioned slave end carriage by fulcrum.
Above-mentioned operation control device, the reading of the above-mentioned Weight measurement device during the reading of calculating the above-mentioned Weight measurement device of optical fiber soot before synthetic synthesizes with optical fiber soot poor, calculate again and pile up the eccentric distance of optical fiber soot on kind of the rod, thereby compensate the quality that this eccentric distance is calculated optical fiber soot for the centre of gravity place of rotating shaft center.
Above-mentioned slave end carriage with kind of excellent opposite sides on, be provided with and prevent that this slave end carriage from increasing because of the weight of optical fiber soot, and to kind of the oblique balance bob of excellent inclination.
In above-mentioned slave end carriage, with the subtend position of the installation site of above-mentioned balance bob on be provided with and tilt to detect sensor, and adjust the position of balance bob corresponding to the inclination reading value that this inclination detects sensor.
It is the lifting guiding mechanism that rotation center makes the decline rotation of carriage that above-mentioned kind rod supports rotary drive mechanism to have with the pivot fulcrum.
Optical fiber soot synthesis apparatus has for fixing jet pipe, when making kind of rod and horizontal direction axle support the axle supporting device rotation of this kind rod, makes it the rotation reciprocating drive mechanism that moves back and forth in the horizontal direction.Perhaps, optical fiber soot synthesis apparatus has for the kind rod with the fixed position rotation, the mechanism that jet pipe is moved back and forth in a horizontal direction.
Purpose of the present invention and feature, and other purpose will be described in more detail in conjunction with following relevant accompanying drawing with feature.
Fig. 1 is the pie graph of the optical fiber soot synthesis apparatus of first embodiment of the invention;
Fig. 2 is illustrated in and measures the principle diagrammatic sketch of clad with the quality of soot in the optical fiber soot synthesis apparatus shown in Figure 1;
Fig. 3 represents the part pie graph of the deformation form of optical fiber soot synthesis apparatus shown in Figure 1;
Fig. 4 is the pie graph of the optical fiber soot synthesis apparatus of the 2nd embodiment of the present invention;
Fig. 5 is the pie graph of the optical fiber soot synthesis apparatus of the present invention the 3rd embodiment;
Fig. 6 is the sectional view of Fig. 5 line A-A, is especially in regard to the visibly moved up and down sectional view of being permitted mechanism of slave end carriage;
Fig. 7 A and B are the diagrammatic sketch of the universal coupling among diagram Fig. 5;
Fig. 8 A-Fig. 8 D is the diagrammatic sketch of the description weight assay method in the optical fiber soot synthesis apparatus shown in Figure 5;
Fig. 9 is visibly moved up and down other formation sectional view of being permitted mechanism of expression slave end carriage shown in Figure 5;
Figure 10 represents that visibly moved up and down another other of being permitted mechanism of slave end carriage shown in Figure 5 constitutes sectional view;
Figure 11 is the pie graph of the optical fiber soot synthesis apparatus of fourth embodiment of the invention;
Figure 12 is the detailed pie graph of the universal coupling among Figure 11;
Figure 13 is visibly moved up and down other formation sectional view of being permitted mechanism of slave end carriage shown in Figure 5;
Figure 14 for the slope compensation of the slave end carriage of optical fiber soot synthesis apparatus of the present invention shown in Figure 11, detect the pie graph of inclination;
Figure 15 is the part sectioned view of the optical fiber soot synthesis apparatus of embodiments of the invention;
Figure 16 is the pie graph of optical fiber soot synthesis apparatus instrumentation of the present invention system;
Figure 17 is the sectional view of lifting guiding mechanism of the optical fiber soot synthesis apparatus of the embodiment of the invention.
The optical fiber soot synthesis apparatus of first embodiment of the invention is described with reference to Fig. 1.
In the shell frame 1 of optical fiber soot synthesis apparatus, plant rod 2 and support rotary drive mechanism 4A, the horizontal ground axle suspension of 4B by kind of a rod. It is synthetic with jet pipe (バ-Na) 3 that subtend kind rod 2 is arranging soot. Plant excellent 2 by support rotary drive mechanism 4A, 4B driven rotary, and synthesize with the in the horizontal direction over the ground reciprocal driving of do of phase of jet pipe 3 corresponding to soot. In the reciprocal driving process of this kind, by for example silicon tetrachloride (SiCl that emits from jet pipe 34) gas and oxyhydrogen flame, synthetic clad optical fiber soot 5 around kind of rod 2.
Kind of rod is supported rotary actuation 4A, 4B, includes: axle 7A, the 7B of the chuck 6A at the two ends by kind of rod 2, the support kind rod of 6B level; Be arranged on bearing 10A, the 10B of the outside of shell frame 1; Axle rotary driving part 8A, 8B with axle 7A, 7B synchronous rotary; Support the first carriage 9A, the 9B of these axle rotary driving parts 8A, 8B. Planting rod supports rotary drive mechanism 4A, 4B also to include: rotate freely the 2nd carriage 11A, the 11B of supporting axis 7A, 7B by bearing 10A, 10B; The first movable table 12A, the 12B that carry the first carriage 9A, 9B and move in the horizontal direction; Carry the second movable table 13A, the 13B of the second carriage 11A, 11B. And, plant rod and support rotary drive mechanism 4A, 4B, connect in addition the first movable table 12A, 12B and the second movable table 13A, 13B, and the reciprocal driving thread spindle 14 of being combined, making the first movable table 12A, 12B and the second movable table 13A, 13B to move back and forth in the same way with horizontal direction with their screw threads.
Back and forth drive the rotation of thread spindle 14 by this kind, the first movable table 12A, 12B and the second movable table 13A, 13B are in the same way mobile, the first carriage 9A, 9B on these first movable table 12A, 12B and the second movable table 13A, 13B and axle rotary driving part 8A, 8B, reach the second carriage 11A, 11B and bearing 10A, 10B and also all move horizontally simultaneously, plant rod 2 and also move horizontally.
Again, planting rod supports rotary drive mechanism 4A, 4B to have the guide rail (not shown) that leads that moves back and forth to the first movable table 12A, 12B and the second movable table 13A, 13B
Axle 7A, 7B are sealed by sealing 15A, 15B from the perforation part that shell frame 1 connects, and it is negative keeping in the shell frame 1, make it positively to carry out in shell frame 1 the synthetic of optical fiber soot.
In the optical fiber soot synthesis apparatus of this first embodiment, kind of rod is supported to bear among rotary drive mechanism 4A, the 4B between the second carriage 11A, the 11B and the second movable table 13A, 13B of one of wt part of soot 5, accompanies one pair of soot weight and detects sensor 16A, 16B.
Detect sensor 16A, 16B as these optical fiber soot weight, adopt strain instrument or force cell.
Soot weight detects sensor 16A, 16B, when the s operation control device 70 that access realizes with microcomputer, s operation control device 70 are calculated quality from the weight of the optical fiber soot 5 that detects sensor 16A, 16B mensuration with soot weight the operation of optical fiber soot synthesis apparatus is controlled.
In this kind optical fiber soot synthesis apparatus, s operation control device 70 drives kind of a rod and supports rotary drive mechanism 4A, 4B and make 2 rotations of kind of rod, and, by kind of rod 2 and optical fiber soot 5 being moved back and forth in the horizontal direction and being sprayed as silicon tetrachloride gas and oxyhydrogen flame synthetic synthetic around kind of rod 2, accumulation optical fiber soot by jet pipe 3. Exhaust gas discharges from the exhaust outlet (not shown).
The weight of synthetic soot 5 often detects sensor 16A, 16B by soot weight and detects in building-up process, and is detecting in the s operation control device 70 that sensor links to each other with soot weight, with in real time, accurately calculate the quality of optical fiber soot.
The computing that s operation control device 70 is stipulated is if the synthetic quality that reaches regulation of judging optical fiber soot 5, then s operation control device 70 stops the synthetic of optical fiber soot 5.
The kind rod 2 of having piled up the optical fiber soot 5 that end of synthesis is arranged is folded down and takes out from shell frame 1 from chuck 6A, 6B, follows excellent 2 axles of new kind and is supported among chuck 6A, the 6B in the shell frame 1, again carries out the synthetic of new optical fiber soot 5.
The gap of sealing 15A, 15B is 0.1mm-1.0mm, but because being negative pressure in the shell frame 1, so the gas of shell frame 1 inside can not discharged the outside of shell frame 1.
Again, please remove or nitrogen purge gas from nitrogen insert port (not shown), can improve the functional of sealing 15A, 15B.
As mentioned above, soot weight detects sensor 16A, 16B and inserts between the second movable table 13A, 13B and the second carriage 11A, the 11B, the weight of the optical fiber soot 5 that is synthesized around these kinds of instrumentation rod 2 and this kind rod 2. S operation control device 70 deducts the known second carriage 11A, 11B, bearing 10A, 10B, axle 7A, 7B, chuck 6A, 6B and plants the weight of rod 2 from soot weight detects whole gravimetries of sensor 16A, 16B, calculate the weight of synthetic optical fiber soot 5, calculate again its quality.
Below, the experimental example of the first embodiment of the present invention is described.
Experimental example 1
Soot 5 and the weight of planting rod 2: the 4Kg(kilogram)
Plant the rotation number of rod 2: 250 γ pm(rev/mins)
Plant the speed that moves back and forth of rod 2: the 100mm/min(mm/min)
Pressure in the shell frame 1: 740Torr
Soot weight detects the mensuration precision of sensor 16A, 16B: 50g(0.05%)
Soot 5 right side soot weight detect among the sensor 16A effect general assembly (TW) and reach: 100Kg
As above, soot weight detects each of sensor 16A, 16B, with force cell with 100Kg left and right sides measurement range, and can be with the weight of the precision determination optical fiber soot 5 of 50g.
Again, as shown in phantom in Figure 1, soot weight detects sensor 16A, 16B and can insert between bearing 10A, 10B and the second carriage 11A, the 11B.In this case, detect among sensor 16A, the 16B in soot weight, because the weight of not bearing the second carriage 11A, 11B, thus, soot weight detects corresponding the reducing of measurement range energy of sensor 16A, 16B, its resolution and precision height have further improved the quality determining precision of optical fiber soot 5.
Describe below from the weight of the optical fiber soot 5 measured and accurately calculate its method for quality.
Fig. 2 represents the sectional view of optical fiber soot shown in Figure 1.
Detect among sensor 16A, the 16B in soot weight, except above-mentioned weight, also have change power effect that produce by 2 rotations of kind of rod, shown in the formula (1).
W＝M·g+m·RL·ω 2（1）
Here, W detects the weight that sensor 16A, 16B detect for soot weight; G is an acceleration of gravity; M is the quality of soot 5; M is the eccentric mass of soot 5; ω is a distance from the rotation center a of soot 5 to the centre of gravity place b of soot 5 for angular velocity RL.
Though mass M is the synthetic quality of the desired optical fiber soot of obtaining 5, owing to have second on unknown formula (1) the right, so depend merely on the mass M that it can not calculate optical fiber soot 5.
Second the method on disappearance formula (1) the right has following 2 kinds of methods.
Method 1
Make angular velocity omega from ω 1Change to ω 2, measure each soot weight and detect the weight W that sensor 16A, 16B are detected 1And W 2, then obtain following formula
W 1＝M·g+m·RL·ω 1 2（2）
W 2＝M·g+m·RL·ω 2 2（3）
Weight W 1With W 2For soot detects the measured value of sensor 16A, 16B, angle speed ω 1And ω 2Be setting value, be known.These value substitution formula (2) and formula (3), can obtain (mRL), if handle calculates (mRL) substitution formula (2) or formula (3) just can be calculated (Mg).Because gravity acceleration g is known, so in operation control device 70, can calculate the mass M of optical fiber soot 5.One example of its formula is represented with formula (4).
M＝（W 2ω 1 2-W 1ω 2 2）/g（ω 1 2-ω 2 2） （4）
Operation control device 70, with first angular velocity omega 1Make 2 rotations of kind of rod, read first weight W that soot weight detects sensor 16A, 16B 1, after this, with second angular velocity omega 2Make 2 rotations of kind of rod, read second weight W that soot weight detects sensor 16A, 16B again 2, just can calculate the mass M of the synthetic optical fiber soot of kind of rod 2 from formula (4).
Method 2
According to the difference of the centre of gravity place b of optical fiber soot 5, detect varying in weight that sensor 16A, 16B detect with soot weight.In Fig. 2, a is a rotation center, and b is a centre of gravity place, and RL is the distance from rotation center a to centre of gravity place b, and θ is the perpendicular line of process rotation center a and the angle of the line formation that links rotation center a and centre of gravity place b.In this case, formula (5) is set up.
'W＝M·g+m·RL·ω 2·COSθ （5）
In the positions that differing 180 degree to weight W(θ) and W(θ+π) measures and can get following formula.
W（θ）＝M·g+m·RL·ω 2·COSθ （6）
W（θ+π）＝M·g-m·RL·ω 2·COSθ （7）
From two formula cancellation (mRL ω 2COS θ),
: M=(W(θ)+W(θ+π))/2g (8)
Operation control device 70 just can be calculated the quality of optical fiber soot synthetic on kind of the rod 2 by the formula of solving (8).
In this method 2, except soot weight detects sensor 16A, 16B,, rotary encoder 34 is housed in axle 7A end in order to detect the anglec of rotation of kind of rod 2 with the position that differs 180 degree.The output of this rotary encoder 34 inputs to operation control device 70, operation control device 70 is according to the rotation value of detecting from rotary encoder 34, calculate soot weight in the anglecs of rotation that differ 180 degree detect sensor 16A, 16B detect weight and be W(θ)+value of W(θ+π), calculate the quality of optical fiber soot according to formula (8) again.
As mentioned above, with said method 1 or method 2, operation control device 70, from detect the weight of the optical fiber soot 5 that sensor 16A, 16B measure by soot weight, feed back to the synthetic action of optical fiber soot with the correct quality of calculating optical fiber soot 5 in real time in the building-up process of optical fiber soot 5, this result, when the quality of optical fiber soot 5 reached setting, 70 of operation control devices stopped the synthetic processing of optical fiber soot, so can carry out the synthetic of very accurate optical fiber soot 5.
Therefore,, there is no need as above-mentioned prior art according to the optical fiber soot synthesis apparatus of embodiments of the invention, synthetic again or excess electron excess fraction corroded eliminate processing to insufficient section behind optical fiber soot 5 end of synthesis.Its result can improve the synthetic throughput rate of optical fiber soot, has shortened manufacturing time.In addition, also not needing to carry out is the too much very few trouble operation of quality of adjusting optical fiber soot 5, and the problems such as fire damage of the synthetic again clad part that forms have also simplified during mass deficiency.
Again, when optical fiber soot is synthesized, give elder generation after piling up the layer that becomes a metalclad part around the kind rod that constitutes the heart with the jet pipe that is different from above-mentioned jet pipe 3 (figure does not show), the method for synthesizing above-mentioned optical fiber soot is very suitable.At this moment, constitute the metalclad a part of layer of part of also regarding as kind of rod of being piled up of the kind rod of the heart on every side, and on this kind rod, carry out the synthetic of optical fiber soot.
Fig. 3 is the part pie graph of deformation form of the optical fiber soot synthesis apparatus of first embodiment of the invention.
In Fig. 3, on the axle 7A between right-hand axis rotary driving part 8A and the bearing 10A, insert and be coupled part 17A.Symbol shown in and for example illustrating in the bracket inserts on the axle 7B between left-hand axis rotary driving part 8B and the bearing 10B and is coupled part 17B.
Be coupled part 17A(17B) from axle rotary driving part 8A(8B) revolving force pass to kind of rod 2, but axle rotary driving part 8A(8B) weight of side can not pass to soot weight and detect sensor 16A(16B).As a result, detecting sensor 16A, 16B with soot weight can measure and remove a weight of the weight of rotary driving part 8A, 8B.Soot weight detects sensor 16A, 16B improves precision because of not bearing the weight of rotary driving part 8A, 8B, and the gravimetry precision of optical fiber soot 5 is also higher.
Second embodiment of optical fiber soot synthesis apparatus of the present invention is described with reference to Fig. 4 now.In optical fiber soot synthesis apparatus shown in Figure 4, the member identical with the member of pie graph 1 optical fiber soot synthesis apparatus gives identical label.Among Fig. 4, the kind rod 2, jet pipe 3, optical fiber soot 5 and chuck 6A, the 6B that are arranged in the shell frame 1 do not draw for omission.
In optical fiber soot synthesis apparatus shown in Figure 4, the bearing 10A, the 10B that are arranged in the optical fiber soot synthesis apparatus shown in Figure 1 have been cancelled, the second carriage 11A, 11B, the second movable table 13A, 13B.On the other hand, in the optical fiber soot synthesis apparatus shown in Figure 4, in the way of axle 7A, 7B, insert soot weight and detect sensor 16A, 16B, detect driving that sensor 16A, 16B detect sensor 16A, 16B to the taking-up and the soot weight of the detecting signal of operation control device 70 with power supply from these soot weight, all be end, carry out through slip rings 18A, 18B from axle 7A, 7B.Slip rings 18A, 18B are supported by the first carriage 9A, 9B by arm 19A, 19B.
By above-mentioned structure, soot weight detects the weight that sensor 16A, 16B can only measure kind of rod 2, optical fiber soot 5 and chuck 6A, 6B.
Though soot weight detects the power that sensor 16A, 16B are subjected to 3 dimension directions, soot weight detects the power that sensor 16A, 16B detect, with the quality of correctly calculating optical fiber soot 5 after operation control device 70 analyzing and processing.
Soot weight detects the detecting signal of sensor 16A, 16B, not only can insert operation control device 70, and can detect sensor 16A, 16B with wireless mode concatenation operation control device 70 and soot weight by wired mode of above-mentioned slip rings 18A, 18B.
In optical fiber soot synthesis apparatus shown in Figure 4, also identical with optical fiber soot synthesis apparatus shown in Figure 3, in soot weight detected axle 7A, 7B part between sensor 16A, 16B and axle rotary driving part 8A, the 8B, can peg graft was coupled part 17A, 17B shown in the dotted line.Like this, soot weight detects the influence of weight that sensor 16A, 16B can not be subjected to being coupled axle rotary driving part 8A, the 8B in part 17A, the 17B outside, and the weight of optical fiber soot 5, kind rod 2, chuck 6A, 6B is measured, in operation control device 70, can more critically calculate the quality of optical fiber soot 5.
And, in the connecting portion of chuck 6A, 6B and axle 7A, 7B, can peg graft and detect sensor 16A, 16B, thereby can only measure the weight of optical fiber soot 5 and kind rod 2 and calculate the quality of optical fiber soot 5 into soot weight.
The 3rd embodiment of optical fiber soot synthesis apparatus of the present invention is described referring now to Fig. 5 and Fig. 6.Fig. 6 is the sectional view of seeing from the A-A tangent line of Fig. 5.
Because graphic relation, though not shown shell frame 1 among Fig. 5 is still being accommodated in shell frame 1 and is being planted rod 2, optical fiber soot 5, the synthetic jet pipe 3 of using of soot, chuck 6A, 6B, and the part of axle 7A, 7B.
Optical fiber soot synthesis apparatus shown in Figure 5 has along with making kind of excellent fulcrum driving mechanism 4A, 4B and making kind of a rod support rotary drive mechanism 4A, reciprocating while of the 4B left and right sides, makes the rotation reciprocating drive mechanism 67 of optical fiber soot 5 rotations.
Soot weight detects sensor 16A, 16B and is arranged on formation carriage 21A, the slave end carriage 21A2 of 21B, the bottom of 21B2.
Kind of excellent fulcrum driving mechanism 4A, 4B include: shared pedestal 68 is arranged on guide shaft 39 and carriage 21A, 21B on the pedestal 68 for 2 one-tenth parallel directions of kind of rod.To form them are the 20A of bearing portion, 20B of constituting by the 20A1 of inboard bearing portion, 20B1 and the slave end bearing 20A2 of portion, 20B2, rotate freely supporting axis 7A, 7B, channeling conduct equidirectional moving back and forth simultaneously in guide rail 39 by driving side carriage 21A1,21B1 and slave end carriage 21A2,21B2 for carriage 21A, 21B.
In order to make optical fiber soot 5 evenly synthetic on kind of rod 2, be provided with the rotation reciprocating drive mechanism 67 that makes that optical fiber soot 5 rotations and do with respect to jet pipe 3 move back and forth.This rotation reciprocating drive mechanism 67 is made up of following member: be arranged on all-in-one-piece nut 23A, 23B among base 22A, the 22B of carriage 21A, 21B; Be arranged in parallel and the screw thread 24 of screw fixed in nut 23A, 23B with respect to axle 7A, 7B; Move back and forth motor 25 by the kind rod that makes screw thread 24 rotations and kind of rod 2 is moved back and forth with respect to jet pipe 3 by carriage 21A, 21B and axle 7A, 7B etc.; The thread spindle 26 that be arranged in parallel with screw thread 24; The revolving force of thread spindle 26 is sent to rotation transmission member 27A, the 27B of a 7A, 7B; By making thread spindle 26 rotations and the kind rod of kind of rod 2 rotation in around this axle center being rotated with motor 28 by axle 7A, 7B etc.
Axle 7A, 7B are divided into driving axial region 7A1,7B1 and driven axial region 7A2,7B2 respectively.These drive axial region 7A1,7B1 and driven axial region 7A2,7B2 interconnect with universal coupling 29A, 29B, universal coupling 29A, 29B are as rotation transmitting device, the limit absorbs the displacement of the coupling part that drives axial region 7A1,7B1 and driven axial region 7A2,7B2, drives axial region 7A1,7B1 and driven axial region 7A2,7B2 Yi Bian be used to link these.
As above-mentioned axle 7A, 7B, be divided into and drive axial region 7A1,7B1 and driven shaft 7A2,7B2, be in order to detect in the gravimetry of sensor 16A, 16B in soot weight, not being subjected to the weight of driven bracket 21A1,21B1 side and increasing the axle that brings 7A, 7B are reclinate with the quality of the synthetic optical fiber soot 5 that carries out influences.
Follow axle 7A, 7B are divided into the structure that drives axial region 7A1,7B1 and driven axial region 7A2,7B2, plant rod and support carriage 21A, the 21B of rotary drive mechanism 4A, 4B also to be divided into driving side carriage 21A1,21B1 and slave end carriage 21A2,21B2.
Drive axial region 7A1,7B1 and driven axial region 7A2,7B2,, be driven lateral bracket 21A1,21B1 and slave end carriage 21A2,21B2 rotation and be supported freely respectively by the 20A1 of inboard bearing portion, 20B1 and the slave end bearing 20A2 of portion, 20B2.Transmit revolving force by rotation transmission member 27A, 27B to driving axial region 7A1,7B1.Driving side carriage 21A1,21B1 be arranged on base 22A, 22B above.
Slave end carriage 21A2,21B2, by soot weight detect sensor 16A, 16B be supported on base 22A, 22B above.
Detect sensor 16A, 16B as soot weight, adopt force cell or the deformation-sensor of measuring ratings (measurement range is the 50Kg(kilogram).
By the visibly moved up and down 31A of mechanism, the 31B of being permitted of the slave end carriage of being made up of linear guide apparatus, lifting freely is being supported respectively for slave end carriage 21A2,21B2.The visibly moved up and down 31A of mechanism, the 31B of being permitted of slave end carriage is by guide rail 32A, 32B with by these guide rails 32A, 32B guiding, and lifting is supporting lift component 33A, the 33B of slave end carriage 21A2,21B2 to constitute freely.
In the end of driving shaft member 7A1, be provided with the rotary encoder 34 that detects its rotation.
Fig. 7 A, 7B represent the structure of universal coupling 29A, 29B.
By synthetic the carrying out of optical fiber soot 5, the weight of optical fiber soot 5 increases, and soot weight detects the distortion of sensor 16A, 16B and makes slave end carriage 21A2,21B2 displacement slightly downwards with the increase of optical fiber soot weight.At this moment, drive the axle center of axial region 7A1,7B1 and driven axial region 7A2,7B2, will depart from for example several about 10 microns.
This departs from by universal coupling 29A, 29B and absorbs, and, makes to drive axial region 7A1,7B1 burden soot weight and detect a part of loading that sensor 16A, 16B should bear and make it to take place error at measurment and so on thing because this departs to prevent.
Therefore, by universal coupling 29A, 29B, even increase with the synthetic weight of carrying out optical fiber soot, the also influence that gained in weight by this, detect the weight that can critically measure optical fiber soot 5 among sensor 16A, the 16B in soot weight, this measurement result of operation control device 70 usefulness can critically be calculated the quality of optical fiber soot 5.
Again, when having gravity power in addition to be added to slave end carriage 21A2,21B2, slave end carriage 21A2,21B2, also because permitted the 31A of mechanism, 31B support so that mobile being restricted beyond the upper and lower by the slave end carriage is visibly moved up and down, produce displacement so can prevent slave end carriage 21A2,21B2 because of the power beyond the gravity, and soot weight detects the weight that sensor 16A, 16B can correctly measure optical fiber soot 5.
Improve the quality of optical fiber soot, detect sensor 16A, 16B correctly the gravimetry, also must consider the centre of gravity place of optical fiber soot 5 except relying on soot weight.
With reference to Fig. 8 A-D, the weight (quality) of trying to achieve optical fiber soot 5 and the method for centre of gravity place are described now.
Between chuck 6A, 6B, load onto kind of rod 2, when kind of rod 2 is rotated with revolution N, detect revolution N that sensor 16A, 16B could detect and drive axial region 7A1,7B1 from 2 soot weight and repeat the loading Wa(θ that increases and decreases synchronously) and Wb(θ).But θ is illustrated in figure 2 as the anglec of rotation that drives axial region 7A1,7B1, and establish kind of rod 2 towards under point be the point of θ=0.
Loading Wa(θ) and Wb(θ) reason that changes, be because drive the bending of axial region 7A1,7B1, departing from etc. of the axle center of driving shaft 7A1,7B1 and driven shaft 7A2,7B2, therefore, though can make it to reduce to certain degree by adjusting, can not get rid of loading Wa(θ fully) and Wb(θ) change.Therefore, operation control device 70 is necessary to consider this loading Wa(θ) and Wb(θ) the error that causes of change calculate the quality of soot 5.
Below, the method for eliminating this error is described.
Loading Wa(θ) and Wb(θ) change and soot 5 weight change (increase) irrelevant, only otherwise kind of rod 2 is exchanged or optical fiber soot synthesis apparatus do not adjusted again, just can not change.Therefore, operation control device 70 is measured the loading Wa(θ that 2 soot weight detect the detection output of sensor 16A, 16B before synthetic carrying out optical fiber soot), Wb(θ) and Wnt(θ)
Wnt（θ）＝Wa（θ）+Wb（θ） （5）
Note θ and Wnt(θ shown in Fig. 8 A) relation.Wnt(θ) represents the error that mechanical precision causes.
Afterwards, if beginning optical fiber soot 5 is synthetic, then in the building-up process of optical fiber soot 5, just can obtain shown in Fig. 8 B, be different from synthetic preceding loading with Wrt(θ).Operation control device is also noted this and value.
Try to achieve loading Wnt(θ) with Wrt(θ) difference to eliminate the error that mechanical precision causes, can try to achieve the real change loading W of following formula *(θ).
W ＊（θ）＝Wrt（θ）-Wnt（θ） （6）
This real loading is shown in Fig. 8 C.
The change loading W that calculates like this *(θ) be optical fiber soot 5 weight with since the component vertically downward of the centrifugal force around the eccentric caused runout of the centre of gravity place of optical fiber soot 5 and.With the following formula approximate representation be:
W ＊（θ）＝W ＊ c（θ）+W ＊ a（θ）cos（θ-α） （7）
In the formula, W * c(θ) be W *(θ) Bian Dong central value, W * a(θ) be centrifugal force, α is the phase angle of the off-centre of soot 5.
The offset RL at centre of gravity place G place can be by relational expression centrifugal force=(quality) * (radius) * (angular velocity) 2Try to achieve:
W ＊ a（θ）＝W ＊ c（θ）×RL×（2πN） 2
RL＝W ＊ a（θ）/[W ＊ c（θ）×（2πN） 2] （8）
In addition, if get the ratio that 2 soot weight detect the temporal mean value of the loading that sensor 16A, 16B shared, then shown in Fig. 8 D, get as shown in the formula the ratio of mean value.
The mean value of the measured value of 1:r=(right sensor 16A):
(mean value of the measured value of left side sensor 16B) (9)
Again,
Distance between 1+r=(2 sensor 16A, the 16B) (10)
By following formula can try to achieve the left side from the position of sensor 16B to the distance 1 of center of gravity G and right side from sensor 16A to centre of gravity place G apart from r.
Above-mentioned computing is to carry out with high-speed real-time ground in the operation control device 70 that constitutes with counter.
On kind of rod 2 during the synthetic fibre-optical soot, though the member that constitutes all optical fiber soot synthesis apparatus on the pedestal 68 moves back and forth and moves to the left and right with optical fiber soot 5, but its translational speed, as mentioned above, for lower about 100 millimeters/minute, even moving direction also influences the gravimetry of optical fiber soot hardly when changing.
In above-mentioned optical fiber soot synthesis apparatus,, can be with positive and negative 50g(gram for the aimed quality of synthetic fibre-optical soot 5) accuracy rating in measure the quality of whole soots 5.At this moment, the control of the discharge-amount of the jet pipe 3 by operation control device 70 and the speed control that kind of rod 2 is moved back and forth, can control centre of gravity place G from 2 millimeters in axle center radius direction with 5 millimeters of interior and length directions in.
Fig. 9 represents that visibly moved up and down other section of being permitted the 31A of mechanism, 31B of the slave end carriage that moves up and down of allowing slave end carriage 21A2,21AB2 constitutes.
Soot weight detects sensor 16A, 16B and carries and be located among substructure member 22A, the 22B.
The visibly moved up and down 31A of mechanism, the 31B of being permitted of slave end carriage, be to be supported in freely on these frameworks 35A, the 35B with axle 37A, 37B rotation at framework 35A, 35B on substructure member 22A, the 22B and one end by vertically-arranged, its other end is supporting swivel arm 36A, the 36B of slave end carriage 21A2,21B2 to constitute hinge type.
According to the visibly moved up and down structure of being permitted the 31A of mechanism, 31B of this hinge type slave end carriage, can control the height of optical fiber soot synthesis apparatus lowly.When the height step-down of optical fiber soot synthesis apparatus, can not only make the optical fiber soot equipment miniaturization, and the member of the optical fiber soot synthesis apparatus that moves along with moving back and forth of optical fiber soot 5 also diminishes, and reduced like this to constitute the error component that soot weight detects the gravimetry of sensor 16A, 16B.
Visibly moved up and down another other cross-section structure of being permitted the 31A of mechanism, 31B of slave end carriage that Figure 10 moves up and down for allowing slave end carriage 21A2,21B2.
Install soot weight among base component 22A, the 22B and detect sensor 16A, 16B.
The visibly moved up and down 31A of mechanism, the 31B of being permitted of slave end carriage, the central authorities that are made of this arm vertically-arranged at framework 35A, 35B on substructure member 22A, the 22B and swivel arm 36A, 36B are supported on said frame 35A, the 35B freely with axle 37A, 37B rotation, with the distolateral support slave end of one carriage 21A2,21B2 and with another distolateral support balance bob 38A, 38B.
The visibly moved up and down 31A of mechanism, the 31B of being permitted of this slave end carriage as above, owing to have balance bob 38A, 38B, so it is little to make soot weight detect the suffered weight of sensor 16A, 16B, best, can make it little to only being the weight degree of the optical fiber soot 5 that is synthesized, because it is little to make soot weight detect the measurement ratings of sensor 16A, 16B, so can improve resolution characteristic and the measuring accuracy that soot weight detects sensor 16A, 16B.Consequently, the quality of optical fiber soot 5 is calculated precision and is uprised in the operation control device 70.
According to embodiment, be 250 millimeters from axle center to the distance of the centre of gravity place of balance bob 38A, 38B as axle 37A, the 37B of balance fulcrum, the weight of balance bob 38A, 38B is 25 kilograms.In this condition, the measurement ratings that soot weight detects sensor 16A, 16B can be reduced to quality precision that 10 kilograms, optical fiber soot 5 calculate can be brought up to positive and negative 10 grams for the calibration mass value precision.
With reference to Figure 11, the fourth embodiment of the present invention is described now.
This optical fiber soot synthesis apparatus, only make optical fiber soot 5 in its axle center around rotation and not moving back and forth, on the other hand, make that soot is synthetic to move back and forth at length direction with jet pipe 3.Also promptly, Fig. 1 and jet pipe shown in Figure 53 are fixed, and present embodiment is opposite, and jet pipe 3 can be moved back and forth.
Soot weight detects sensor 16A, 16B, is arranged on universal coupling 29A, 29B to divide the slave end carriage the open bottom of the visibly moved 31A of mechanism, 31B up and down.In the end of turning axle 7A1, the 7B1 of carriage 21A, 21B side, be provided with rotary encoder 34A, 34B, and constitute the anglec of rotation that can detect kind of rod 2.Other structure is basically with shown in Figure 5 identical.
Structure shown in Figure 11, the length of the length direction of its optical fiber soot synthesis apparatus can shorten.Again, because there be not moving back and forth of optical fiber soot 5, so reduced the factor produce measuring error with moving of optical fiber soot 5.
Figure 12 represents the universal coupling 29A of optical fiber soot synthesis apparatus shown in Figure 11, the structure of 29B.
Universal coupling 29A, the structure of 29B is to drive axial region 7A1,7B1 and driven axial region 7A2, in the mutual end face of 7B2, be respectively equipped with by central component 29A1,29A2 and the outside member 30A1 that surrounds, the coaxial structure body that 30A2 constitutes, at central component 29A1, one place of the circumferencial direction of 29A2 is provided with ditch 41A1,41A2, at ditch 41A1, the position of 41A2, central component 29A1,29A2 and the outside member 30A1 that surrounds, put into spheroid 42A1 between the 30A2,42A2, picture is held these spheroids 42A1 under the arm, 42A2 is such, both sides central component 29A1,29A2 and the outside member 30A1 that surrounds, insert the two ends that shared revolving force transmits arc plate 43 in the space between the 30A2, the periphery of these members is surrounded with common outer cover 44.
By universal coupling 29A, the 29B of this structure, can absorb skew between above-mentioned driving axial region 7A1,7B1 and driven axial region 7A2, the 7B2 etc. sleekly, thereby improve soot weight sensor 16A, 16B survey reason precision the weight of optical fiber soot 5.
As the rotation transmitting device of the displacement that absorbs the follower axle, can use also except that above-mentioned universal coupling 29A, 29B that other universal couplings, magnetic are coupled, fluid is coupled etc. again.
Figure 13 represents to allow the visibly moved up and down sectional view of being permitted another other formation of the 31A of mechanism, 31B of the slave end carriage that moves up and down of slave end carriage 21A2,21B2.
Slave end the carriage shown in Figure 13 visibly moved up and down 31A of mechanism, 31B perhaps are made up of following member: promptly be arranged on guide rail 32A, 32B on the side that is placed on base component 22A, framework 35A, 35B above the 22B; Supporting lifting lifting rail member 33A, the 33B of slave end carriage 21A2,21B2 freely by these guide rails 32A, 32B guiding; By screw thread in conjunction with the adjustment screw thread 46A, the 46B that connect on horizontal tray 45A, the 45B of the upper end of framework 35A, 35B; Be arranged on spring-loaded arm 47A, 47B on slave end carriage 21A2, the 21B2; Adjust the drag spring 48a, the 48B that stretch and be provided with between screw thread 46A, 46B and spring suppport arm 47A, the 47B; Screw in and adjust among screw thread 46A, the 46B, adjust adjustment nut 49A, the 49B of the tension force of drag spring 48A, 48B.
With the visibly moved up and down 31A of mechanism, the 31B of being permitted of the slave end carriage of above-mentioned formation, identical with balance bob 38A, 38B shown in Figure 10, because drag spring 48A, 48B are arranged, can make soot weight detect the suffered weight of sensor 16A, 16B reduces, the measurement ratings that soot weight detects sensor 16A, 16B reduces, with the resolution and the measuring accuracy of the gravimetry that improves optical fiber soot 5.
In this example, the total length of having used drag spring 48A, 48B is 150 millimeters, and spring constant is 5000 Newton/meter, has adjusted tension force by adjusting screw thread 46A, 46B.The general assembly (TW) of driven axial region 7A2,7B2 and slave end carriage 21A2,21B2 is 38 kilograms, and makes soot weight detect the measurement range design of sensor 16A, 16B at 10 kilograms.
By with the visibly moved up and down optical fiber soot synthesis apparatus of being permitted the 31A of mechanism, 31B of slave end carriage shown in Figure 13, stage before kind of rod 2 is installed, adjust the tension force of drag spring 48A, 48B, so that detect among sensor 16A, the 16B in soot weight, be subjected to 3 kilograms load, after the weight of the optical fiber soot 5 when optical fiber soot 5 is synthetic is carried out tension adjustment with tension spring 48A, 48B to it, detect the soot weight that sensor 16A, 16B measuring optical fiber soot 5 synthesize with soot weight.In this embodiment, because a part of weight of optical fiber soot 5 is by drag spring 48A, 48B burden, so can calculate the actual weight of optical fiber soot 5.
With the value result relatively that the synthetic value at the end of optical fiber soot 5 and other accurate Libra are measured, the maximal value of this difference is 7 to restrain.Promptly, if the slave end carriage of use Figure 13 is the visibly moved 31A of mechanism, 31B up and down, detect sensor 16A, the 16B weight of measuring optical fiber soot 5 very critically with soot weight, last, can very correctly calculate the quality of optical fiber soot 5 with operation control device 70.
As offsetting other method that detects the weight of suffered member on sensor 16A, the 16B in soot weight, replace drag spring 48A shown in Figure 13,48B with available electromagnetic force, buoyancy etc. again.
The fragmentary cross-sectional view of having represented the optical fiber soot synthesis apparatus of other embodiment of the present invention among Figure 14 and Figure 15.
The both sides relative with the optical fiber soot 5 of slave end carriage 21A2,21B2 are the face of opposite side, for example, and at the upper-lower position place, with outstanding in the horizontal direction slide-and-guide axle 54A, the 54B of being provided with of form of overhanging support.Among slide-and-guide axle 54A, the 54B, balance bob 55A, the 55B relative with the weight of optical fiber soot 5 and driven axial region 7A2,7B2 etc. is chimeric sliding freely.
The position that makes balance bob 55A, 55B increases corresponding to the weight that soot weight detects the optical fiber soot 5 that sensor 16A, 16B detect, and changes towards the direction of the inclination that prevents slave end carriage 21A2,21B2.The slave end carriage 21A2 of optical fiber soot 5 that like this, just can prevent to result to act on slave end carriage 21A2,21B2 and the weight of driven axial region 7A2,7B2 etc., the inclination of 21B2.Consequently, can be reduced among lifting guiding mechanism 51A, the 51B of lifting of guiding slave end carriage 21A2,21B2, the friction force of generation, thus can in optical fiber soot 5 synthetic, calculate its weight (quality) accurately.
Be provided with guide rail 52A, 52B and sliding component 53A, 53B in the optical fiber soot synthesis apparatus of Figure 14 and Figure 15.
As embodiment, soot weight detects sensor 16A, 16B, and use to measure ratings be 60 kilograms beam shape force cell; Sliding component 53A, the 53B use roller diameter of lifting guiding mechanism 51A, 51B is 4 millimeters a winding up roller guiding mechanism; Universal coupling 29A, 29B use is quiet allows that torque is the universal coupling of 12 kilogram-metres.
Figure 16 is the structural drawing of optical fiber soot weight (quality) calculation system in the optical fiber soot synthesis apparatus of expression Figure 14 and part shown in Figure 15 formation.
Detect the anglec of rotation that drives axial region 7A1,7B1 and driven axial region 7A2,7B2 with rotary encoder 34, and input to operation control device 70.Again, the detecting signal that soot weight is detected sensor 16A, 16B with distortion amplifier 58A, 58B amplifies and imports operation control device 70.
The detecting signal that detects sensor 16A, 16B from soot weight amplifies with distortion amplifier 58A, 58B, calculates the mean value that time average is handled in operation control device 70, obtain these and, to calculate soot 5 weight (quality) in synthetic in real time.
Experimental example 2
The gravimetry result (experimental example) of the soot 5 shown in table-1 expression Figure 14 and 15 in the mensuration system and the comparison of the gravimetry result (comparative example) in the optical fiber soot synthesis apparatus shown in Figure 5.
In this is measured, replace optical fiber soot 5, measure respectively 10 times with the counterweight of 1000 grams.
Table-1
The experimental example comparative example
Minimum measured value 991 grams 942 grams
Greatest measurement 1005 grams 1013 grams
Mean value 998 grams 976
Maximum-minimum 14 grams 71 grams
Above comparative result shows, if with Figure 14 and structure shown in Figure 15, then can make the weight measurement precision of optical fiber soot improve a lot.In this experimental example, can be with the weight of the positive and negative 10 precision determination optical fiber soots that restrain.
With reference to Figure 14 and Figure 15, further describe optical fiber soot synthesis apparatus of the present invention once again.
In this embodiment, becoming locating up and down of opposition side one side with the both sides of optical fiber soot 5 subtends of slave end carriage 21A2,21B2, with outstanding setting slide-and-guide axle 54A, the 54B of overhanging support pattern horizontal direction.In the precalculated position of slide-and- guide axle 54A, 54B, the corresponding balance bob 55A of weight, the 55B of chimeric and optical fiber soot 5 and driven axial region 7A2,7B2 etc., and be fixed in the suitable position.
Again, below soot weight detects sensor 16A, 16B, be provided with soot weight and detect sensing station adjusting mechanism 59A, 59B, it can make the position that detects sensor 16A, 16B with respect to the soot weight of moving lateral bracket 21A2,21B2, the weight that detects the optical fiber soot 5 that sensor 16A, 16B detect corresponding to soot weight increases, and towards preventing that the direction that slave end carriage 21A2,21B2 tilt from changing.
Detect sensing station adjusting mechanism 59A, 59B by soot weight and make the position that detects sensor 16A, 16B with respect to the soot weight of slave end carriage 21A2,21B2, detect the increase of the weight of the optical fiber soot 5 that sensor 16A, 16B detect corresponding to soot weight, and change towards the direction of the inclination that prevents slave end carriage 21A2,21B2.Like this, can suppress to result to act on the slave end carriage 21A2 of the weight of the optical fiber soot 5 of slave end carriage 21A2,21B2 and driven axial region 7A2,7B2 etc., the inclination of 21B2, and can be reduced in the friction force that is produced among elevating mechanism 51A, the 51B of guiding slave end carriage 21A2,21B2 lifting, thereby can be in optical fiber soot 5 synthetic, measure its weight accurately with in real time.
The foregoing description though what describe is the synthetic example that is fixed with jet pipe 3 of optical fiber soot, can be exactly make jet pipe 3 mobile as the described structure of reference Figure 11 also, and kind of rod 2 and optical fiber soot 5 are only rotated and does not move back and forth in the horizontal direction.
Again, lifting guiding mechanism 51A, 51B are not limited to 2 row as shown, and 1 row, 3 row or the above formation of 4 row also can.
In order to detect the inclination of slave end carriage 21A2,21B2, the tilt detection sensor 61 of load sensor or infinitesimal deflection analyzer etc. can be set in the part of lifting guiding mechanism 51A, 51B preferably.The value of detecting of operation control device 20 these tilt detection sensors 61 of input, and make balance bob 55A, 55B or soot weight detect the position change of sensor 16A, 16B.Like this, detecting the precision that sensor 16A, 16B measure the weight of optical fiber soot 5 with soot weight can improve more.
In addition, also can it make following structure, promptly soot weight is detected the top that sensor 16A, 16B are arranged on slave end carriage 21A2,21B2, detect sensor 16A, 16B with soot weight and slave end carriage 21A2,21B2 and driven axial region 7A2,7B2 are hung down (figure does not show).
As the device that is coupled of the axle displacement that absorbs driven axial region 7A2,7B2, except above-mentioned universal coupling 29A, 29B, other can also be coupled device with magnetic not shown in the figures, fluid is coupled device etc.
As shown in figure 17, lifting guiding mechanism 51A, 51B are made use the rotary lifting guiding mechanism of pivot 60 also to be fit to.Adopt this structure, also can reduce the unfavorable factor that acts in the gravimetry of optical fiber soot 5 that soot weight detects sensor 16A, 16B.
In Figure 15,, also can only be arranged in the appropriate position of side though balance bob 55A, 55B are equipped on two places up and down of the side of slave end carriage 21A2,21B2 again.
More than, though be example about the embodiment of optical fiber soot synthesis apparatus of the present invention, optical fiber soot synthesis apparatus of the present invention can carry out suitable combination to structure shown in above-mentioned all embodiment.In addition, the present invention is not limited to said structure, can thought according to the present invention make all deformation forms.

Claims (31)

1, a kind of by a kind rod that constitutes the optical fiber heart (the heart and form the part of clad section in addition by multiple kind rod all around at the heart as required), the soot that constitutes covering on above-mentioned kind rod synthesizes and makes the optical fiber soot synthesis apparatus of fibre parent material, and this optical fiber soot synthesis apparatus contains:
A pair of kind rod that make it to rotate from both sides horizontal direction support kind rod, the subtend configuration is supported rotary drive mechanism;
Emit optical fiber soot raw material and oxyhydrogen flame, and make it the jet pipe of synthetic fibre-optical soot on this kind rod;
The shell of the optical fiber soot of accommodating this jet pipe, kind rod and being synthesized adds (Ha ウ ジ Application ケ);
Make this jet pipe and above-mentioned kind rod make the reciprocating device that moves back and forth relatively, in the horizontal direction; With
Be arranged on the above-mentioned a pair of rod of planting and support in each of rotary drive mechanism, be used for measuring a pair of Weight measurement device that above-mentioned kind is excellent and synthesize and be deposited in the weight of the optical fiber soot on this kind rod.
2, synthesizer according to claim 1 is characterized in that, above-mentioned kind rod supports that rotary drive mechanism comprises:
Thereby side horizontal direction axle is supported a pair of axle supporting device of above-mentioned kind rod;
Axle is supported each end of this supporting device and a pair of axle rotary driving part of subtend configuration;
Support a pair of first carriage of this a pair of axle rotary driving part and subtend configuration in vertical direction;
A pair of second carriage with the excellent side subtend configuration of the kind of this a pair of first carriage inboard;
The pair of bearings that is arranged in each of this a pair of second carriage and bears above-mentioned a pair of axle supporting device,
Above-mentioned a pair of Weight measurement device is packed in above-mentioned a pair of second carriage, and is used for measuring the weight of the optical fiber soot that forms on kind of a rod, this kind rod, above-mentioned a pair of axle supporting device and above-mentioned pair of bearings.
3, synthesizer as claimed in claim 2, it is characterized in that, each of above-mentioned a pair of axle supporting device with being coupled the device combination, and makes above-mentioned Weight measurement device not be subjected to the influence of a rotary driving part and first carriage between above-mentioned first carriage and above-mentioned second carriage.
4, synthesizer as claimed in claim 1 is characterized in that, described optical fiber soot synthesis apparatus also comprises: input is from the gravimetry signal of above-mentioned Weight measurement device, the operation control device of calculating the quality of the optical fiber soot of piling up on the above-mentioned kind rod.
5, synthesizer as claimed in claim 4 is characterized in that, when above-mentioned operation control device reaches predetermined target value in the quality of the optical fiber soot of calculating, makes above-mentioned optical fiber soot stop to synthesize.
6, synthesizer as claimed in claim 5, it is characterized in that, above-mentioned operation control device, by above-mentioned axle rotary driving part, make the rotation of above-mentioned axle supporting device with 2 kinds of different angular velocity, 2 gravimetries of the above-mentioned Weight measurement device from each angular velocity are calculated the quality that is deposited in the optical fiber soot on the above-mentioned kind rod.
7, synthesizer as claimed in claim 6, it is characterized in that, described optical fiber soot synthesis apparatus also comprises the angle detection device that detects the excellent anglec of rotation of above-mentioned kind, above-mentioned operation control device according to calculate by angle value of detecting of this angle detection device the anglec of rotation differ the above-mentioned Weight measurement device in the 180 degree positions the weight value of detecting and, again by this weight with calculate the quality that is deposited in the optical fiber soot on the above-mentioned kind rod.
8, synthesizer as claimed in claim 1 is characterized in that, above-mentioned kind rod supports that rotary drive mechanism includes:
Supporting a pair of axle supporting device of above-mentioned kind rod from both sides horizontal direction axle;
Axle is supporting a pair of axle rotary driving part of each end of this supporting device,
Above-mentioned a pair of Weight measurement device is packed in the above-mentioned a pair of axle supporting device, to measure the weight of the optical fiber soot that forms on kind of rod and this kind rod.
9, synthesizer as claimed in claim 8, it is characterized in that, each of above-mentioned a pair of axle supporting device, be by combining with being coupled device, thereby make above-mentioned Weight measurement device not be subjected to the influence of the above-mentioned synthetic weight increase that is brought because of optical fiber soot between the installation site of above-mentioned Weight measurement device and the above-mentioned axle rotary driving part.
10, synthesizer as claimed in claim 9 is characterized in that, above-mentioned optical fiber soot synthesis apparatus has input from the gravimetry signal of above-mentioned Weight measurement device, the operation control device of calculating the quality that is deposited in the optical fiber soot on the above-mentioned kind rod.
11, synthesizer as claimed in claim 10 is characterized in that, above-mentioned operation control device when the quality of the optical fiber soot of calculating reaches predetermined target value, stops the synthetic of above-mentioned optical fiber soot.
12, synthesizer as claimed in claim 1 is characterized in that, above-mentioned kind rod supports that rotary drive mechanism comprises:
The a pair of inboard bearing portion that is provided with on the subtend position;
Be adjacent to a pair of driving side carriage that this inboard bearing portion and subtend are provided with;
And a pair of slave end carriage that inboard subtend is provided with;
Drive axial region and driven axial region between the slave end carriage of this subtend, supporting the axle supporting device of kind of rod, being divided into;
Rotation connects the combining mechanism of above-mentioned driving axial region and driven axial region freely between above-mentioned driving side carriage and above-mentioned slave end carriage;
Respond the visibly moved up and down mechanism that permitted of slave end carriage that the suffered weight change of above-mentioned slave end carriage makes the lifting of above-mentioned slave end carriage;
Transmit the rotary drive mechanism of rotation by above-mentioned axle supporting device between above-mentioned inboard bearing portion,
Above-mentioned Weight measurement device is arranged on the visibly moved up and down bottom of being permitted mechanism of above-mentioned slave end carriage.
13, synthesizer as claimed in claim 12 is characterized in that, above-mentioned rotating mechanism is a universal coupling.
14, synthesizer as claimed in claim 12 is characterized in that, the guide rail that the excellent bolster driving mechanism of above-mentioned kind has vertical direction to be provided with,
Above-mentioned slave end carriage is visibly moved is up and down permitted mechanism along this lifting rail.
15, synthesizer as claimed in claim 12 is characterized in that, above-mentioned kind rod support rotary drive mechanism has the framework of vertical direction setting and rotate the swivel arm of earth's axis support freely in this framework,
The slave end carriage is housed in this pivot arm.
16, synthesizer as claimed in claim 12 is characterized in that, above-mentioned kind rod support rotary drive mechanism that framework that vertical direction is provided with is arranged and by this framework rotation freely at the swivel arm of supporting, and the balance bob that in a side of this swivel arm, is provided with,
The other end of this swivel arm is installed with the slave end carriage.
17, synthesizer as claimed in claim 12 is characterized in that, above-mentioned kind rod supports rotary drive mechanism that drag spring of fixing in framework that vertical direction is provided with and this framework and the free-ended spring suppport arm that is connected this drag spring are arranged,
The other end of this spring suppport inserts on the above-mentioned driving side carriage by fulcrum.
18, as synthesizer as described in the claim 12, it is characterized in that described optical fiber soot synthesis apparatus has input to go out to be deposited in the operation control device of the quality of the optical fiber soot on the above-mentioned kind rod from the gravimetry calculated signals of above-mentioned Weight measurement device.
19, as synthesizer as described in the claim 18, it is characterized in that, above-mentioned operation control device, the difference of the reading of the above-mentioned Weight measurement device during the reading of calculating the above-mentioned Weight measurement device of optical fiber soot before synthetic synthesizes with optical fiber soot, with calculate the eccentric distance of centre of gravity place for the rotating shaft center that is deposited in the optical fiber soot on kind of the rod, then by the compensation of this eccentric distance being calculated the quality of optical fiber soot.
20, as synthesizer as described in the claim 19, it is characterized in that above-mentioned operation control device makes the synthetic of above-mentioned optical fiber soot stop when the quality of the optical fiber soot of calculating reaches predetermined target value.
21, synthesizer as claimed in claim 12 is characterized in that, in the position of the opposition side of above-mentioned slave end carriage, is provided with the balance bob that prevents this slave end carrier tilt.
22, synthesizer as claimed in claim 21, it is characterized in that, be provided with tilt detection sensor in above-mentioned slave end carriage, above-mentioned operation control device is adjusted the position of above-mentioned balance bob to prevent the inclination of above-mentioned slave end carriage with inclination value of detecting of this tilt detection sensor.
23, synthesizer as claimed in claim 12 is characterized in that, it is the lifting guiding mechanism that rotation center makes the decline rotation of carriage that above-mentioned kind rod supports rotary drive mechanism to have with the pivot fulcrum.
24, synthesizer as claimed in claim 1, it is characterized in that, described optical fiber soot synthesis apparatus have make kind of rod and in the horizontal direction axle support the axle supporting device of this kind rod, reciprocating in the horizontal direction rotation reciprocating drive mechanism in the time of relatively-stationary jet pipe rotation.
25, synthesizer as claimed in claim 1 is characterized in that, described optical fiber soot synthesis apparatus has and makes jet pipe for the kind rod with fixed position rotation, the mechanism that moves back and forth as horizontal direction.
26, synthesizer as claimed in claim 1 is characterized in that, described Weight measurement device is force cell or strainmeter.
27, synthesizer as claimed in claim 1 is characterized in that, above-mentioned each supporting device all has the turning axle that combines with the chuck of holding the kind rod from both sides under the arm.
28, a kind of optical fiber soot synthesis apparatus, it has:
When both sides horizontal direction support has the kind rod that constitutes optical fiber heart part, make it, support rotary drive mechanism as the kind rod center rotation, that a pair of subtend is provided with transverse axis;
Make and on this kind rod, become the jet pipe that the optical fiber soot of fibre cladding synthesizes;
Being arranged on the above-mentioned a pair of rod of planting supports in each of rotary drive mechanism, measures above-mentioned kind rod and synthetic and be deposited in a pair of Weight measurement device of the weight of the optical fiber soot on the above-mentioned kind rod.
As optical fiber soot synthesis apparatus as described in the claim 28, it is characterized in that 29, it also has input from the gravimetry value of above-mentioned Weight measurement device, with the operation control device of the quality of only calculating synthetic optical fiber soot in real time.
30, synthesizer as claimed in claim 28, it is characterized in that, described optical fiber soot synthesis apparatus also has weight adjustment mechanism, the weight of the optical fiber soot that the synthetic back of this weight adjustment mechanism response increases, above-mentioned kind rod is supported that rotary drive mechanism maintains on the predetermined equilibrium state, thereby can make above-mentioned kind rod support to make above-mentioned weight detection device can measure the weight of above-mentioned kind rod and optical fiber soot under the influence of power of rotary drive mechanism bending in the weight that is not subjected to and the optical fiber soot that increases synthetic by above-mentioned optical fiber soot.
31, as optical fiber soot synthesis apparatus as described in the claim 30, it is characterized in that it also has the gravimetry value of input from above-mentioned Weight measurement device, and with the operation control device of the quality of only calculating the optical fiber soot after synthetic in real time.
CN91109143A 1990-10-25 1991-09-19 Optical fiber soot synthesis apparatus Expired - Lifetime CN1030591C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP28773190 1990-10-25
JP287731/90 1990-10-25
JP102645/91 1991-05-08
JP110142/91 1991-05-15
JP3110142A JPH04338124A (en) 1991-05-15 1991-05-15 Production of optical fiber soot

Publications (2)

Publication Number Publication Date
CN1060910A true CN1060910A (en) 1992-05-06
CN1030591C CN1030591C (en) 1995-12-27

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Application Number Title Priority Date Filing Date
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051980C (en) * 1993-07-09 2000-05-03 古河电气工业株式会社 Optical fiber soot production apparatus
CN103630216B (en) * 2012-08-27 2015-09-16 浙江富通光纤技术有限公司 A kind of dynamic weighing system for horizontal powder deposition
CN110316951A (en) * 2018-03-28 2019-10-11 住友电气工业株式会社 Methods for optical fiber manufacture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051980C (en) * 1993-07-09 2000-05-03 古河电气工业株式会社 Optical fiber soot production apparatus
CN103630216B (en) * 2012-08-27 2015-09-16 浙江富通光纤技术有限公司 A kind of dynamic weighing system for horizontal powder deposition
CN110316951A (en) * 2018-03-28 2019-10-11 住友电气工业株式会社 Methods for optical fiber manufacture
CN110316951B (en) * 2018-03-28 2022-11-01 住友电气工业株式会社 Optical fiber manufacturing method

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