CN110375879A - A kind of FRP-FBG packaging system and localization method - Google Patents
A kind of FRP-FBG packaging system and localization method Download PDFInfo
- Publication number
- CN110375879A CN110375879A CN201910559129.9A CN201910559129A CN110375879A CN 110375879 A CN110375879 A CN 110375879A CN 201910559129 A CN201910559129 A CN 201910559129A CN 110375879 A CN110375879 A CN 110375879A
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- optical fiber
- grid region
- workbench
- packaging system
- die plate
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 20
- 230000004807 localization Effects 0.000 title claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 54
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000005538 encapsulation Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 11
- 239000011889 copper foil Substances 0.000 description 11
- 239000000835 fiber Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 6
- 238000007731 hot pressing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/165—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by means of a grating deformed by the object
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Optical Transform (AREA)
Abstract
The invention discloses a kind of FRP-FBG packaging system and localization methods, this packaging system can reduce optical fiber residual stress by strainer, optical fiber after tensioning is also able to maintain the not flexible torsional deformation of straight line in processing, and the sensor mass made is high, high-efficient.In sensor, grid region is wrapped up, using being easily guaranteed that grid region is in center in this localization method not only process, but also it is subsequent can re-flag place grid region position on a sensor, is installed and used after convenient.The invention is used for sensor encapsulation field.
Description
Technical field
The present invention relates to sensor encapsulation fields, more particularly to a kind of FRP-FBG packaging system and localization method.
Background technique
FBG: fiber Bragg grating sensor, Fiber Bragg Grating.
FRP: fibre reinforced composites, Fiber Reinforced Plastics.
FBG belongs to one kind of fibre optical sensor, and Fundamentals of Sensors are by external physical quantity to optical fiber Bragg wavelength
Modulation obtain sensor information, be a kind of wavelength modulation type fiber-optic grating sensor.Fiber-optic grating sensor may be implemented
Direct measurement to physical quantitys such as temperature, strains, can be attached to structure surface or in advance embedment structure in, to structure simultaneously into
Row health detection, impulse detection, shape control and vibration damping detection etc., and the defect situation of analysis structure.In recent years, light
Fiber grating sensor is anti-interference with its, corrosion-resistant, electrical isolation, high sensitivity and the features such as distributed large-range measuring, increasingly
It is widely used in engineering detecting.
It since fiber grating is more fragile, is very easy to be broken off in a bad working environment, thus needs to carry out it
It could be used after encapsulation.And fibre reinforced composites can be with effective protection optical fiber, and improves the survival rate of optical fiber, sensitivity.
In no dedicated templates hot pressing, the FRP prepreg generallyd use is opaque, it is hot-forming after sensor can not essence
Standard influences the accurate positionin of monitoring point when subsequent use to positioning in the fibre reinforced composites after hardening of the grid region FBG；This
Outside, no special hot pressing mold can not also carry out the FBG encapsulation of high-volume high quality.
Summary of the invention
The purpose of the present invention is to provide a kind of FRP-FBG packaging systems and localization method to disappear for improving encapsulation process
Except optical fiber residual stress, improve optical fiber grid region positioning accuracy.
The technical solution used in the present invention is:
A kind of FRP-FBG packaging system, including upper die plate and lower heated die plate；The lower heated die plate is equipped with protuberance
Workbench and the strainer that is distributed at left and right sides of workbench, the centre of the workbench be equipped with groove, the workbench
Be respectively arranged on the left side and the right side several lower accommodating grooves, accommodating groove is arranged in parallel under each item, stores under often opposite two in two sides
Slot is conllinear and partners；Upper die plate position of heated die plate protuberance workbench under face is equipped with downwards convex
Platform, the position of boss accommodating groove under face are equipped with upper accommodating groove, and boss covers groove, upper accommodating groove and lower accommodating groove when pushing
The channel of storage optical fiber is limited jointly, and upper accommodating groove is U-lag, and lower accommodating groove is V-shaped groove.
As an improvement of the above scheme, two strainers include the bracket of pulley and clamping pulley left and right ends, bracket
It is fixed on lower heated die plate, two pairs of pulleys are respectively by contrary torque for pullling optical fiber.
As an improvement of the above scheme, torsional spring is arranged in the hinged place of pulley and bracket.
As an improvement of the above scheme, two strainers include pulley, clamp the bracket of pulley left and right ends and match
Pouring weight, bracket are fixed on lower heated die plate, and when being laid with optical fiber, optical fiber, which is overlapped on pulley, forms angled transition, and clump weight is straight
It connects and is removably hung in optical fiber head and the tail both ends.
As an improvement of the above scheme, the upper side of groove or/and downside further extend to work edge of table, until
It is pierced by the side wall of workbench.
A kind of localization method using above-mentioned packaging system, optical fiber include the grid region in optical fiber middle position, including with
Lower step: label is arranged in the left and right ends of optical fiber respectively using the midpoint in grid region as symmetrical centre in S1., it is ensured that two labels it
Between minimum
Spacing is equal to the left and right width of workbench；
S2. grid region length is recorded on label；
S3. several optical fiber are laid on the table, the sensor after machine-shaping is long according to the grid region on label
Degree, exists again
Sensor surface marks grid region position.
As an improvement of the above scheme, in step S1, lines, two lines are coated in the symmetric position of optical fiber by marking pen
The distance between item is equal to the width of workbench, ensures that the edge of label is aligned lines according to lines setting label.
As an improvement of the above scheme, in step S3, the position of center line of sensor is determined, according to the grid recorded on label
Section length, using the position of center line as starting point, two sides mark grid region to the left and right.
Beneficial effects of the present invention: this packaging system can reduce optical fiber residual stress by strainer, after tensioning
Optical fiber is also able to maintain the not flexible torsional deformation of straight line in processing, and the sensor mass made is high, high-efficient.Sensing
In device, grid region is wrapped up, using being easily guaranteed that grid region is in center in this localization method not only process, and also it is subsequent
Place grid region position can be re-flagged on a sensor, installed and used after convenient.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 is the perspective view of packaging system；
Fig. 2 is the bottom view of top board；
Fig. 3 is the schematic diagram of optical fiber and label；
Fig. 4 is the schematic diagram of entire encapsulation process.
Specific embodiment
Referring to figs. 1 to Fig. 4, the present invention is a kind of FRP-FBG packaging system and localization method.Using the orientation in Fig. 1 as base
Standard, upper left lower right are width direction, also referred to as the left and right sides, and relatively, lower-left upper right is upper and lower two sides.
Packaging system includes upper die plate 11 and lower heated die plate 12, and upper die plate 11 is mounted on lifting top rod, lower to add
Hot-die plate 12 is fixed.Bossed workbench 13 is set on lower heated die plate 12 and is distributed in 13 left and right sides of workbench
Strainer, the centre of workbench 13 is equipped with groove 21, and workbench 13 is respectively arranged on the left side and the right side several lower accommodating grooves
22, accommodating groove 22 is arranged in parallel under each item, and accommodating groove 22 is conllinear under every two and partners.Upper die plate 11 is in face work
The position for making platform 13 is equipped with boss 23, and the position of the accommodating groove 22 under face of boss 23 is equipped with upper accommodating groove 24, and boss 23 pushes
When cover groove 21, boss 23 faces 21 region hot pressing FRP packaging FBG of groove, and upper accommodating groove 24 and lower accommodating groove 22 are common
Limit the channel of storage optical fiber 41.Upper accommodating groove 24 is U-lag, and lower accommodating groove 22 is V-shaped groove.
When wherein optical fiber 41 is placed in lower accommodating groove 22, V-shaped groove being capable of effectively 41 head and the tail both ends of grip optical fiber.Optical fiber 41
Head and the tail both ends are typically provided with round tube and play the role of protection, and the size of upper accommodating groove 24 needs to be greater than round tube diameter.Upper receipts
Receive 24 pressing circular tubes of slot while, give round tube compression space, this downtrodden part of round tube forms good with fiber prepreg material
It is fixedly connected well, round tube has the space buffer of compression without in edge split fibre prepreg.
According to the difference of function, lower accommodating groove 22 is further divided into temperature V-shaped groove and strain V-shaped groove, upper accommodating groove 24
Accordingly it is divided into temperature U-lag and strain U-lag.Temperature V-shaped groove is used for making temperature compensation sensor, strain V-shaped groove
In production strain transducer.In Fig. 1, the lower accommodating groove 22 of several of downside is temperature V-shaped groove, several lower accommodating grooves of upside
22 be strain V-shaped groove.
In other embodiments, strainer is horizontal pull rod, and pull rod assists grip optical fiber 41 to realize tensioning.As excellent
Choosing, two strainers include the bracket 32 of pulley 31 and clamping 31 left and right ends of pulley, and bracket 32 is fixed on lower heated die plate
12, two pairs of pulleys 31 are respectively by contrary torque for being tensioned optical fiber 41；This structure is simpler, practical more square
Just.Pulley 31 is equipped with the V-shaped groove of several storage optical fiber 41, of courses, the lower accommodating groove 22 on the V-shaped groove and workbench 13 is total
Line, structure are essentially identical.In Fig. 1, optical fiber 41 is overlapped on the upside of pulley 31 respectively, the torque that then upside of pulley 31 generates
Direction is towards upper left and bottom right.
In order to allow pulley 31 to rotate, can in the shaft of pulley 31 eccentric setting weight, such as counterweight.Preferably,
Torsional spring is arranged in the hinged place of pulley 31 and bracket 32.
In order to be tensioned.Two strainers include the bracket 32 and clump weight of pulley 31, clamping 31 left and right ends of pulley,
Bracket 32 is fixed on lower heated die plate 12, and when being laid with optical fiber 41, optical fiber is overlapped on pulley 31 and forms angled transition, plays arc
Spend the effect of support, at this time pulley 31 can not grip optical fiber 41, clump weight is directly removably hung in the head and the tail of optical fiber 41 two
End.Clump weight is made of one with clip, clip can direct grip optical fiber 41, such clump weight is more convenient to use.
In other embodiments, groove 21 is completely in workbench 13.Preferably, the upper side of groove 21 or/
Further extend to 13 edge of workbench with downside, until being pierced by the side wall of workbench 13.It, can slightly after sensor hot pressing is good
Micro- fitting groove 21, the design are convenient for levering up the sensor after machine-shaping.Specific fluting is having a size of 80mmx20mm.
In the present embodiment, the size of lower heated die plate 12 is 200mmx230mmx15mm, groove 21 having a size of
190mmx100mmx2mm is placed in carbon fiber prepreg in groove 21 or glass fibre prepreg, the size of fiber prepreg material is
190mmx100mm, substantially can aligned recesses 21.The circle conduit diameter wrapped up outside FBG having a size of 0.95mm, lower accommodating groove 22
Bottom size is 0.92mm, can block FBG and not slide easily.The size of boss 23 is 190mmx100mmx2mm, upper accommodating groove
24 radius is 1.5mm.The tensile force that strainer generates is in 10g or so.
This can reduce 41 residual stress of optical fiber by strainer.Grid region 42 after tensioning is also able to maintain in processing
The not flexible torsional deformation of straight line, the sensor mass made are high, high-efficient.
Optical fiber 41 includes the grid region 42 in 41 middle position of optical fiber, and 42 length of grid region of different optical fiber 41 may be different.
Although only giving the schematic diagram of an optical fiber 41 arrangement in Fig. 1, it can undoubtedly deduce a plurality of optical fiber 41 and arrange
Structure.A kind of localization method using above-mentioned packaging system, comprising the following steps:
S1. using the midpoint in grid region 42 as symmetrical centre, label 43 is set in the left and right ends of optical fiber 41 respectively, it is ensured that two
Minimum spacing between label 43 is equal to the left and right width of workbench 13.Optionally, by marking pen in the symmetrical position of optical fiber 41
It sets and coats thin lines, the distance between two lines item is equal to the width of workbench 13, ensures according to lines setting label 43
The edge of label 43 is aligned lines.
S2. 42 length of grid region is recorded on label 43.
S3. several optical fiber 41 are laid on workbench 13, the sensor after machine-shaping is according to the grid on label 43
42 length of area marks 42 position of grid region in sensor surface again.The position of center line for determining sensor before this, according to label
42 length of grid region recorded on 43, using the position of center line as starting point, two sides mark grid region 42 to the left and right.
Preferably, small paper slip of the label 43 using rectangle.
Preferably, before hot pressing fiber prepreg material, it is also necessary to which lower surface increases copper foil, two layers of copper foil on a sensor
Grating is wrapped in centre.Specifically, add copper foil in corresponding 42 upper and lower surface of grid region of temperature V-shaped groove, passed for making temperature
Sensor；Corresponding 42 upper and lower surface of grid region of strain V-shaped groove can not increase copper foil, directly production strain transducer.
In sensor, grid region 42 is wrapped up, using being easily guaranteed that grid region 42 is in this localization method not only process
Center, and subsequent can re-flag on a sensor is located 42 position of grid region, to install and use after convenient.
Referring in particular to Fig. 4, the description of prepreg 51 and copper foil 52 is added additional in figure, similar explosive view.Entire encapsulation
Prepreg 51 is put in groove 1 process before this, and optical fiber 41 is laid on prepreg 51；The corresponding grid region of temperature V-shaped groove 42 with it is pre-
Copper foil 52 is set between leaching material 51, copper foil 52 is arranged symmetrically, and the head and the tail both ends of optical fiber 41 are overlapped on pulley 31；Temperature V-shaped groove
The copper foil 52 of the second layer is re-layed above corresponding grid region 42, copper foil 52 is arranged symmetrically, and bilevel copper foil 52 wraps up at this time
Firmly this part of grid region 42；Then one layer of prepreg 51 is repaved, is covered above optical fiber 41；The last pressing downwards of upper die plate 11.It answers
Become the corresponding grid region 42 of V-shaped groove not needing to be laid with copper foil 52, so the grid region 42 of this part is directly by upper layer and lower layer prepreg 51
Package.
Multiple sensors can be disposably produced, are cut the sensor to link together i.e. respectively this when
It can.
Certainly, the design creation is not limited to above embodiment, and the combination of the various embodiments described above different characteristic can also
To reach good effect.Those skilled in the art can also make equivalent change on the premise of without prejudice to spirit of the invention
Shape or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (8)
1. a kind of FRP-FBG packaging system, it is characterised in that: including upper die plate and lower heated die plate；
The strainer for setting bossed workbench on the lower heated die plate and being distributed at left and right sides of workbench, the work
The centre of platform is equipped with groove, and the workbench is respectively arranged on the left side and the right side several lower accommodating grooves, and accommodating groove is parallel under each item
Setting, two often opposite lower accommodating grooves of two sides are conllinear and partner；
Upper die plate position of heated die plate protuberance workbench under face is equipped with downward boss, and boss is received under face
Receive slot position be equipped with upper accommodating groove, boss push when cover groove, upper accommodating groove and lower accommodating groove limit storage light jointly
Fine channel, upper accommodating groove are U-lag, and lower accommodating groove is V-shaped groove.
2. FRP-FBG packaging system according to claim 1, it is characterised in that: two strainers include pulley
With the bracket of clamping pulley left and right ends, bracket is fixed on lower heated die plate, and two pairs of pulleys are respectively by contrary torque
For being tensioned optical fiber.
3. FRP-FBG packaging system according to claim 2, it is characterised in that: the setting of the hinged place of pulley and bracket is turned round
Spring.
4. FRP-FBG packaging system according to claim 1, it is characterised in that: two strainers include pulley, clamping
The bracket and clump weight of pulley left and right ends, bracket are fixed on lower heated die plate, and when being laid with optical fiber, optical fiber is overlapped on pulley
Upper formation angled transition, clump weight are directly removably hung in optical fiber head and the tail both ends.
5. FRP-FBG packaging system according to any one of claim 1 to 4, it is characterised in that: the upper side of groove
Or/and downside further extends to work edge of table, until being pierced by the side wall of workbench.
6. a kind of localization method using packaging system described in any one of any one of claims 1 to 55, optical fiber includes among optical fiber
The grid region of position, it is characterised in that the following steps are included:
S1. using the midpoint in grid region as symmetrical centre, label is set in the left and right ends of optical fiber respectively, it is ensured that between two labels
Minimum spacing is equal to the left and right width of workbench；
S2. grid region length is recorded on label；
S3. several optical fiber are laid on the table, the sensor after machine-shaping is according to the grid region length on label, weight
Newly grid region position is marked in sensor surface.
7. localization method according to claim 6, it is characterised in that: in step S1, by marking pen in the symmetrical of optical fiber
Lines are coated in position, and the distance between two lines item is equal to the width of workbench, ensure label according to lines setting label
Edge is aligned lines.
8. localization method according to claim 7, it is characterised in that: in step S3, determine the position of center line of sensor,
According to the grid region length recorded on label, using the position of center line as starting point, two sides mark grid region to the left and right.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910559129.9A CN110375879B (en) | 2019-06-26 | 2019-06-26 | FRP-FBG packaging device and positioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910559129.9A CN110375879B (en) | 2019-06-26 | 2019-06-26 | FRP-FBG packaging device and positioning method |
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| Publication Number | Publication Date |
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| CN110375879A true CN110375879A (en) | 2019-10-25 |
| CN110375879B CN110375879B (en) | 2021-03-16 |
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