CN109579740A - The measuring device of preform - Google Patents

The measuring device of preform Download PDF

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Publication number
CN109579740A
CN109579740A CN201910085684.2A CN201910085684A CN109579740A CN 109579740 A CN109579740 A CN 109579740A CN 201910085684 A CN201910085684 A CN 201910085684A CN 109579740 A CN109579740 A CN 109579740A
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CN
China
Prior art keywords
preform
laser ranging
index dial
axis
disc carrier
Prior art date
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Pending
Application number
CN201910085684.2A
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Chinese (zh)
Inventor
林志伟
吴钧
储银君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHEJIANG FUTONG OPTICAL FIBER TECHNOLOGY Co Ltd
Original Assignee
ZHEJIANG FUTONG OPTICAL FIBER TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHEJIANG FUTONG OPTICAL FIBER TECHNOLOGY Co Ltd filed Critical ZHEJIANG FUTONG OPTICAL FIBER TECHNOLOGY Co Ltd
Priority to CN201910085684.2A priority Critical patent/CN109579740A/en
Publication of CN109579740A publication Critical patent/CN109579740A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
    • G01B11/255—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures for measuring radius of curvature

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

This application discloses the measuring devices of preform, comprising: lathe, the fixture with grip optical fiber prefabricated rods；Screw rod is rotatably installed on lathe；Track；Disc carrier is indexed, there is the threaded hole cooperated with wire rod thread, indexing disc carrier is slidably matched with track, when screw rod rotates, indexing disc carrier is driven to move along the length direction of track；Stepper motor, for driving screw rod to rotate；Index dial is mounted on indexing disc carrier, and the axis of index dial is overlapped with holder axis, and index dial is for housing in preform；Three laser ranging pens, it is arranged on index dial, and be uniformly arranged around indexing disk axis, distance of each laser ranging launch point away from indexing disk axis is identical, and laser ranging pen is used to emit light to the center of index dial and acquires the distance between launch point and corresponding preform measurement point information.The application can be realized non-contact measurement by three laser ranging pens.

Description

The measuring device of preform
The application be on 04 20th, 2017, application No. is 201710262248.9, entitled " optical fiber the applying date The divisional application of the measurement method and device of prefabricated rods ".
Technical field
The present invention relates to preform fields, and in particular to the measurement method and device of preform.
Background technique
The cylindrical barred bodies such as axis class, cylindrical gauge, glass barred body are in use, and bending value is its key under normal conditions Technical indicator, the occasion in high speed rotary motion is especially applied, such as transmission shaft has bending, in high-speed rotation In, the centrifugal force that crooked position generates will lead to the bearing wear of both ends clamping faster.Therefore, in production this kind of product process In, bending value detection technique is particularly critical.
During preform is manufactured, to production material, such as the deposition targets in OVD depositing operation, MCVD Or casing of PCVD deposition etc., the technology for detecting curvature are very crucial.If these deposition targets or casing curvature are inclined It will lead to optical fiber preform core greatly and the Concentricity tolerance of covering be big, prefabricated rods are scrapped.It even can during the deposition process, because curved The centrifugal force of bent whipping is excessive, and target or casing is caused to be broken.
It is to the mainstream detection gimmick of preform curvature now: by barred body clamping on lathe or on bracket, rotation Transfer rod body finds the biggish point of barred body whipping by naked eyes, then with amesdial against the amplitude of its whipping of this Point Measurement Value；Or the whipping range value with multiple points on amesdial measurement barred body, taking wherein maximum amplitude value is the bending value of barred body. This detection method has the following deficiencies:
One, the use of the data that amesdial is measured is a numerical value, the bending direction of barred body can not be depicted；
Two, the measurement method is contact type measurement, is not suitable for measuring the barred body of high temperature or has particular/special requirement to surface Barred body.
Summary of the invention
The present invention in view of the above-mentioned problems, overcome at least one deficiency, propose the measurement method and device of preform.
The technical solution adopted by the present invention is as follows:
A kind of measurement method of preform, comprising the following steps:
1) preform to be detected is fixed on fixture, three laser ranging pens are equal around the direction of holder axis Even setting, three laser ranging pens are respectively first laser distance-measurement pen, second laser distance-measurement pen and third laser ranging pen, each to swash The launch point of ligh-ranging pen is directed to the axis of fixture, and distance of each launch point away from holder axis is L；
2) establish rectangular coordinate system: in specified holder axis is wherein origin, the transmitting of first laser distance-measurement pen Radiation direction is X-direction, and it is Y direction both perpendicular to the direction of X-axis and Z axis that the axis direction of fixture, which is Z-direction,；
3) along three laser ranging pens of holder axis direction synchronizing moving, and three laser ranging pens are recorded in the seat of Z axis Mark ZP, control laser ranging pen emits light to holder axis direction, and acquires launch point and corresponding preform measurement point The distance between information, the value that wherein first laser distance-measurement pen measures be L1, the value that second laser distance-measurement pen measures is L2, third The value that laser ranging pen measures is L3；
The coordinate of three measurement points measured is respectively (XA, YA, ZP), (XB, YB, ZP), (XC, YC, ZP), wherein XA=L- L1, YA=0, XB=(L-L2) cos120 °, YB=(L-L2) sin120 °, XC=(L-L3) cos240 °, YC=(L-L3) sin240°；
4) coordinate of the corresponding preform center of circle P of three laser ranging pens is (XP, YP, ZP), one is determined according to 3 points The geometrical relationship of a circumscribed circle, acquires XPAnd YP:
5) center of circle P point is calculated in ZPThe bending value Bow and preform radius R at place:
6) center of circle P point is calculated in ZPThe bending direction θ at place, as (XP, YP) in first or fourth quadrant,As (XP, YP) in second or third quadrant,
This method measures preform table by the laser (and laser direction is directed at Z axis) with three beams perpendicular to Z axis Coordinate position of three points in plane right-angle coordinate on the same circumference in face, then determined in terms of a round geometrical relationship by 3 points Calculating the central coordinate of circle and radius of the circle, the distance in the center of circle to Z axis is exactly that preform corresponds to bending value at measurement position, The direction in the corresponding points of Z axis to the center of circle is exactly bending direction of the barred body in the measurement circumference point.
This method can be realized contactless measurement by laser ranging pen；It can quickly and easily be obtained by this method To preform in ZPThe corresponding bending value Bow in place, preform radius R and bending direction θ, so that the later period can be with Process equipment or technique are analyzed according to the data of measurement, guarantee the quality of production of prefabricated rods by Optimizing Flow etc..
Optionally, further include modeling procedure: passing through data group (XP, YP, ZP) and corresponding radius R to preform into Row modeling.
The curved shape that existing method can not describe preform is that rainbow bending or wave linear shape bending are gone back It is helically bent etc..And this method can quickly be modeled according to the data measured, so as to which predispersed fiber is depicted The actual curved shape of stick processed, for example modeled using three-dimensional drawings softwares such as Solidworks, so as to visually show The curved shape of preform is shown.
Optionally, three laser ranging pens are installed on index dial in step 1), and the index dial housing is in predispersed fiber On stick processed.
Disclosed herein as well is a kind of measuring devices of preform, comprising:
Lathe has fixture on lathe, and the fixture is for clamping preform to be detected；
Screw rod is rotatably installed on lathe, and the axis of the screw rod is parallel with the axis of the fixture；
Track is arranged on lathe, and the length direction along screw rod is arranged；
Disc carrier is indexed, there is the threaded hole cooperated with the wire rod thread, indexing disc carrier is matched with track sliding It closes, when screw rod rotates, indexing disc carrier is driven to move along the length direction of track；
Stepper motor, for driving the screw rod to rotate；
Index dial is mounted on indexing disc carrier, and the axis of index dial is overlapped with holder axis, and index dial is used for housing On preform；
Three laser ranging pens are arranged on index dial, and are uniformly arranged around indexing disk axis, each laser ranging pen transmitting Point away from indexing disk axis distance it is identical, laser ranging pen be used for the center of index dial emit light and acquire launch point with it is right Answer the distance between preform measurement point information.
It can be realized non-contact measurement by three laser ranging pens；By the cooperation of screw rod and track, can be realized Index dial is controlled along holder axis direction accurate movement.The equipment of the application can be realized the measurement side of above-mentioned preform Method.
It optionally, further include controller, the stepper motor connects the controller with the equal signal of laser ranging pen, described Controller is for controlling stepper motor rotation, the position of record indexing disc carrier, and reception indexing disc carrier in corresponding position When, three collected range informations of laser ranging pen.
Optionally, the controller is computer.
Prolonged using computer and step motor control measuring device and be scanned on preform axis direction, can obtained It, can be by optical fiber by three-dimensional drawing software to axial coordinate, bending value and the radius of the upper different points of preform axial direction The shape reconstruction of prefabricated rods visually shows the curved shape of preform.
Optionally, there is annular groove on the index dial, link block, the link block and annular groove are installed on annular groove Location fit is slided, the laser ranging pen is removably mounted on link block.
Slide location fit, refer to link block can adjusting position, and adjust be capable of fixing afterwards in place.Pass through setting Annular groove and link block can adjust the position of laser ranging pen, to make 120 ° of angle between laser ranging pen, laser Distance-measurement pen is removably mounted at link block, can facilitate the installation and removal of laser ranging pen in this way, and also facilitates calibration laser Distance-measurement pen is at a distance from the index dial center of circle.
The beneficial effects of the present invention are: this method can be realized contactless measurement by laser ranging pen；Pass through this Method can quickly and easily obtain preform in ZPThe corresponding bending value Bow in place, preform radius R and curved Qu Fangxiang θ is protected so that the later period can analyze process equipment or technique according to the data of measurement by Optimizing Flow etc. Demonstrate,prove the quality of production of prefabricated rods.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram of the measuring device of preform of the present invention；
Fig. 2 is preform flexural measurement schematic illustration.
Each appended drawing reference in figure are as follows:
1, lathe；2, stepper motor；3, fixture；4, preform；5, index dial；6, annular groove；7, link block；8, swash Ligh-ranging pen；9, disc carrier is indexed；10, screw rod；11, first laser distance-measurement pen；12, second laser distance-measurement pen；13, third laser Distance-measurement pen.
Specific embodiment:
Below with reference to each attached drawing, the present invention will be described in detail.
As shown in Fig. 2, a kind of measurement method of preform, comprising the following steps:
1) preform 4 to be detected is fixed on fixture, by three laser ranging pens around the direction of holder axis It is uniformly arranged (angle between two neighboring laser ranging pen is 120 °), three laser ranging pens are respectively first laser ranging Pen 11, second laser distance-measurement pen 12 and third laser ranging pen 13, the launch point of each laser ranging pen are directed to the axis of fixture, Distance of each launch point away from holder axis is L；
2) establish rectangular coordinate system: in specified holder axis is wherein origin, the transmitting of first laser distance-measurement pen Radiation direction is X-direction, and it is Y direction both perpendicular to the direction of X-axis and Z axis that the axis direction of fixture, which is Z-direction,；
3) along three laser ranging pens of holder axis direction synchronizing moving, and three laser ranging pens are recorded in the seat of Z axis Mark ZP, control laser ranging pen emits light to holder axis direction, and acquires launch point and corresponding preform measurement point The distance between information (as shown in Fig. 2, corresponding measurement point be A, B, C), wherein first laser distance-measurement pen measures the value at A and is L1, it is L that second laser distance-measurement pen, which measures the value at B,2, it is L that third laser ranging pen, which measures the value at C,3；
The coordinate of three measurement points measured is respectively (XA, YA, ZP), (XB, YB, ZP), (XC, YC, ZP), wherein XA=L- L1, YA=0, XB=(L-L2) cos120 °, YB=(L-L2) sin120 °, XC=(L-L3) cos240 °, YC=(L-L3) sin240°；
4) coordinate of the corresponding preform center of circle P of three laser ranging pens is (XP, YP, ZP), one is determined according to 3 points The geometrical relationship of a circumscribed circle, acquires XPAnd YP:
5) center of circle P point is calculated in ZPThe bending value Bow and preform radius R at place:
6) center of circle P point is calculated in ZPThe bending direction θ at place, as (XP, YP) in first or fourth quadrant,As (XP, YP) in second or third quadrant,
This method measures preform table by the laser (and laser direction is directed at Z axis) with three beams perpendicular to Z axis Coordinate position of three points in plane right-angle coordinate on the same circumference in face, then determined in terms of a round geometrical relationship by 3 points Calculating the central coordinate of circle and radius of the circle, the distance in the center of circle to Z axis is exactly that preform corresponds to bending value at measurement position, The direction in the corresponding points of Z axis to the center of circle is exactly bending direction of the barred body in the measurement circumference point.
This method can be realized contactless measurement by laser ranging pen；It can quickly and easily be obtained by this method To preform in ZPThe corresponding bending value Bow in place, preform radius R and bending direction θ, so that the later period can be with Process equipment or technique are analyzed according to the data of measurement, guarantee the quality of production of prefabricated rods by Optimizing Flow etc..
In this present embodiment, after testing data above, modeling procedure can be carried out: by data group (XP, YP, ZP) Preform is modeled with corresponding radius R.
The curved shape that existing method can not describe preform is that rainbow bending or wave linear shape bending are gone back It is helically bent etc..And this method can quickly be modeled according to the data measured, so as to which predispersed fiber is depicted The actual curved shape of stick processed, for example modeled using three-dimensional drawings softwares such as Solidworks, so as to visually show The curved shape of preform is shown.
As shown in Fig. 2, in this present embodiment, three laser ranging pens are installed on index dial 5 in step 1), index dial 5 housings are on preform 4.
As shown in Figure 1, in order to realize measurement method above, the present embodiment also discloses a kind of measurement of preform Device, comprising:
Lathe 1 has fixture 3 on lathe 1, and fixture 3 is for clamping preform 4 to be detected；
Screw rod 10 is rotatably installed on lathe 1, and the axis of screw rod 10 is parallel with the axis of fixture 3；
Track is arranged on lathe 1, and the length direction along screw rod 10 is arranged；
Disc carrier 9 is indexed, there is the threaded hole being threadedly engaged with screw rod 10, indexing disc carrier 9 is slidably matched with track, silk When bar 10 rotates, indexing disc carrier 9 is driven to move along the length direction of track；
Stepper motor 2, for driving screw rod 10 to rotate；
Index dial 5 is mounted on indexing disc carrier 9, and the axis of index dial 5 is overlapped with holder axis, and index dial 5 is used for Housing is on preform 4；
Three laser ranging pens 8 are arranged on index dial 5, and are uniformly arranged around indexing disk axis, each laser ranging pen hair Distance of the exit point away from indexing disk axis is identical, and laser ranging pen 8 is used to emit light to the center of index dial 5 and acquires launch point The distance between corresponding 4 measurement point of preform information.
It can be realized non-contact measurement by three laser ranging pens 8；Pass through the cooperation of screw rod 10 and track, Neng Goushi Now control index dial 5 is along holder axis direction accurate movement.The equipment of the application can be realized the above-mentioned bending of preform 4 and survey Amount method.
It in this present embodiment, further include controller (being not drawn into figure), stepper motor 2 and the equal signal of laser ranging pen 8 connect Controller is connect, controller exists for controlling stepper motor rotation, the position of record indexing disc carrier, and reception indexing disc carrier When corresponding position, three collected range informations of laser ranging pen.In this present embodiment, controller is computer.Use meter Calculation machine and 2 control and measure device of stepper motor prolong to be scanned on 4 axis direction of preform, available preform Axial coordinate, bending value and the radius of 4 axial different points, can be by the outer of preform 4 by three-dimensional drawing software Shape is rebuild, and visually shows the curved shape of preform 4.
As shown in Figure 1, in this present embodiment, there is annular groove 6 on index dial 5, be equipped with link block 7 on annular groove 6, even It connects block 7 and annular groove 6 slides location fit, laser ranging pen 8 is removably mounted on link block 7.Location fit is slided, is referred to Be link block 7 can adjusting position, and adjust be capable of fixing afterwards in place.It can be adjusted by setting annular groove 6 and link block 7 The position of laser ranging pen 8, to make 120 ° of angle between laser ranging pen 8,8 company of being removably mounted at of laser ranging pen Block 7 is connect, the installation and removal of laser ranging pen 8 can be facilitated in this way, and also facilitates calibration laser ranging pen 8 and the circle of index dial 5 The distance of the heart.
The above description is only a preferred embodiment of the present invention, not thereby limits scope of patent protection of the invention, all It is directly or indirectly to be used in other relevant technologies with equivalent structure transformation made by description of the invention and accompanying drawing content Field similarly includes within the scope of the present invention.

Claims (4)

1. a kind of measuring device of preform characterized by comprising
Lathe has fixture on lathe, and the fixture is for clamping preform to be detected；
Screw rod is rotatably installed on lathe, and the axis of the screw rod is parallel with the axis of the fixture；
Disc carrier is indexed, there is the threaded hole cooperated with the wire rod thread, when screw rod rotates, drives indexing disc carrier along screw rod Length direction it is mobile；
Stepper motor, for driving the screw rod to rotate；
Index dial is mounted on indexing disc carrier, and the axis of index dial is overlapped with holder axis, and index dial is for housing in light In fine prefabricated rods；
Three laser ranging pens, be arranged on index dial, and around indexing disk axis be uniformly arranged, each laser ranging launch point away from The distance for indexing disk axis is identical, and laser ranging pen is used to emit light to the center of index dial and acquires launch point and corresponding light The distance between fine prefabricated rods measurement point information.
2. the measuring device of preform as described in claim 1, which is characterized in that it further include controller, the stepping Motor connects the controller with the equal signal of laser ranging pen, and the controller is for controlling stepper motor rotation, record indexing The position of disc carrier, and indexing disc carrier is received in corresponding position, three collected range informations of laser ranging pen.
3. the measuring device of preform as claimed in claim 2, which is characterized in that the controller is computer.
4. the measuring device of preform as described in claim 1, which is characterized in that have annular on the index dial Slot is equipped with link block on annular groove, and the link block and annular groove slide location fit, and the laser ranging pen is detachably pacified On link block.
CN201910085684.2A 2017-04-20 2017-04-20 The measuring device of preform Pending CN109579740A (en)

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CN108180934B (en) * 2017-11-30 2020-10-16 彩虹（合肥）液晶玻璃有限公司 Detection device and detection method of optical fiber sensing device
CN110272199B (en) * 2019-07-16 2023-07-04 成都中住光纤有限公司 Method and device for accurately measuring and melting optical fiber preform rod head
CN111473735B (en) * 2020-04-24 2022-04-15 黄宏琪 Device and method for measuring diameter and bow curvature of optical fiber preform on line

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