CN108426591A - Fiber-optic grating sensor encapsulating structure and packaging method suitable for hot environment - Google Patents
Fiber-optic grating sensor encapsulating structure and packaging method suitable for hot environment Download PDFInfo
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- CN108426591A CN108426591A CN201810089618.8A CN201810089618A CN108426591A CN 108426591 A CN108426591 A CN 108426591A CN 201810089618 A CN201810089618 A CN 201810089618A CN 108426591 A CN108426591 A CN 108426591A
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- optic grating
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 11
- 238000005538 encapsulation Methods 0.000 claims abstract description 113
- 239000013307 optical fiber Substances 0.000 claims abstract description 106
- 239000003292 glue Substances 0.000 claims abstract description 73
- 239000000853 adhesive Substances 0.000 claims abstract description 57
- 230000001070 adhesive effect Effects 0.000 claims abstract description 47
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims description 21
- 239000011148 porous material Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 description 20
- 238000010586 diagram Methods 0.000 description 9
- 238000001035 drying Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000004819 Drying adhesive Substances 0.000 description 1
- 239000003522 acrylic cement Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/264—Mechanical constructional elements therefor ; Mechanical adjustment thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
Abstract
The present invention relates to a kind of fiber-optic grating sensor encapsulating structures suitable for hot environment, including upper layer encapsulation and lower layer's encapsulation, lower layer's encapsulation is equipped with optical fiber placement section and two spaced optical fiber fixed holes, optical fiber placement section passes through two optical fiber fixed holes, it is divided into the first placement section, the second placement section and third placement section, first placement section is located between two optical fiber fixed holes, and the groove depth of the first placement section is more than the groove depth of the second placement section and third placement section；Upper layer encapsulation includes two glue injection parts, and two glue injection parts are corresponding with two optical fiber fixed holes respectively, and hole for injecting glue is equipped at the top of glue injection part.The present invention also provides a kind of fiber-optic grating sensor packaging methods suitable for hot environment.When the encapsulating structure installation of the present invention, fiber-optic grating sensor is directly Nian Jie with part to be measured, avoids since the problem of strain is transmitted causes measurement error；Using two point form bonding way, avoids adhesive and the performance of fiber-optic grating sensor itself is had an impact.
Description
Technical field
The present invention relates to sensor technical field more particularly to fiber-optic grating sensor encapsulating structure and packaging methods.
Background technology
Fiber-optic grating sensor is obtained in military affairs, aerospace, environmental monitoring and Civil structure safety detection etc.
To being widely applied.To meet various rugged environment requirements, it is necessary to carry out protectiveness encapsulating structure design to fiber grating.
Currently, there are two types of common packaged types, glued one is fiber grating to be bonded in guard member, then by guard member
It is connected on part to be measured, in use, the strain of part to be measured passes to fiber-optic grating sensor via guard member, but in this process
In, straining the problem of transmitting can so that measurement result is not accurate enough, and another kind is directly by fiber grating integral adhesive to be measured
On part, but when making in this way in high temperature (1000 DEG C or more) environment, need the sensing unit (light of fiber-optic grating sensor
Grid) it is also applied using adhesive, phenomena such as adhesive is possible to expand in use, fiber grating can not only be passed
The performance of sensor has an impact, and the process being bonded is more difficult, and usual adhesive effect is bad.
Invention content
The main object of the present invention, which is to provide one kind, playing encapsulation guarantor to fiber-optic grating sensor under high temperature environment
Shield acts on, and can avoid the fiber-optic grating sensor encapsulating structure being had an impact to fiber-optic grating sensor performance and envelope as possible
Dress method.
To achieve the goals above, the present invention provides a kind of fiber-optic grating sensors suitable for hot environment to encapsulate knot
Structure, it is characterised in that：Including upper layer encapsulation and lower layer's encapsulation；
Lower layer's encapsulation is set there are two spaced optical fiber fixed hole, for utilizing high-temperature adhesives by the light
Fiber grating sensor is fixed on part to be measured；And
Optical fiber placement section, the optical fiber placement section passes through two optical fiber fixed holes, and is consolidated by two optical fiber
Determine through-hole and be divided into the first placement section, the second placement section and third placement section, first placement section is located at two optical fiber
Between fixed hole, the sensing unit for placing the fiber-optic grating sensor, second placement section and the third are placed
Portion is located at the outside of the connected optical fiber fixed hole, for being fixed temporarily the light using normal temperature adhesive agent
Fiber grating sensor；
Wherein, first placement section, the second placement section and third placement section are groove, and the groove depth of the first placement section
More than the groove depth of second placement section and third placement section；
Upper layer encapsulation includes two glue injection parts, two glue injection parts respectively with two optical fiber fixed holes pair
It answers, hole for injecting glue is equipped at the top of the glue injection part.
Preferably, the optical fiber fixed hole of lower layer's encapsulation is that open top is small, and the big bellmouth of bottom opening is described
The hole for injecting glue bottom of upper layer encapsulation is downwardly projecting, is formed and fastens protrusion, the top for fastening protrusion and the optical fiber fixed hole
Portion's openings of sizes matches.
Preferably, the upper layer encapsulation is additionally provided with heating wire, and the heating wire is arranged around the glue injection part.
Preferably, the operating temperature of the heating wire is 40~50 DEG C.
Preferably, the thickness of the slot bottom of second placement section and third placement section is 0.1~0.5mm.
Preferably, the top of the hole for injecting glue is rounded, and diameter range is 2~3mm；The bottom of the optical fiber fixed hole
Rounded, diameter range is 4~5mm.
The present invention also provides a kind of fiber-optic grating sensor encapsulating structures suitable for hot environment, including upper layer to encapsulate
It is encapsulated with lower layer；
Lower layer's encapsulation is set there are two spaced optical fiber fixed hole, for utilizing high-temperature adhesives by the light
Fiber grating sensor is fixed on part to be measured；And
Optical fiber placement section, the optical fiber placement section passes through two optical fiber fixed holes, and is consolidated by two optical fiber
Determine through-hole and be divided into the first placement section, the second placement section and third placement section, first placement section is located at two optical fiber
Between fixed hole, the sensing unit for placing the fiber-optic grating sensor, second placement section and the third are placed
Portion is located at the outside of the connected optical fiber fixed hole, for being fixed temporarily the light using normal temperature adhesive agent
Fiber grating sensor；
Wherein, second placement section and third placement section are groove, and first placement section is strip pore structure；
Upper layer encapsulation includes two glue injection parts, two glue injection parts respectively with two optical fiber fixed holes pair
It answers, hole for injecting glue is equipped at the top of the glue injection part.
The present invention also provides a kind of fiber-optic grating sensor packaging methods suitable for hot environment, using such as above-mentioned
The fiber-optic grating sensor encapsulating structure suitable for hot environment described in one carries out the encapsulation of fiber-optic grating sensor, encapsulation
Method is as follows：
Fiber-optic grating sensor is placed in optical fiber placement section, and is rendered as straight condition, and the fiber grating passes
The sensing unit of sensor is located in first placement section；
The fiber-optic grating sensor is carried out temporarily using normal temperature adhesive agent in the second placement section and third placement section
It is fixed, so that the fiber-optic grating sensor is kept straight condition；
By the upper layer encapsulation with lower layer's cap close fix, and keep two hole for injecting glue respectively with two institutes
It is corresponding to state optical fiber fixed hole, when ensureing the fiber-optic grating sensor being mounted on part to be measured, high-temperature adhesives can
Enter the optical fiber fixed hole from the hole for injecting glue, and the fiber-optic grating sensor is bonded on the part to be measured.
Preferably, upper layer encapsulation is adhesively fixed with lower layer encapsulation using high-temperature adhesives, and after being adhesively fixed,
The two optical fiber fixed holes of two hole for injecting glue of the upper layer encapsulation encapsulated respectively with the lower layer are concentric to be set
It sets.
Preferably, before fixing upper layer encapsulation with lower layer's cap conjunction,
Check whether the fiber-optic grating sensor is higher than the upper surface of lower layer encapsulation；
Check whether the sensing unit of the fiber-optic grating sensor contacts with the first placement section；
If checking the fiber-optic grating sensor to pass higher than the upper surface of lower layer encapsulation and/or the fiber grating
The sensing unit of sensor is contacted with the first placement section, then needs to adjust the fiber-optic grating sensor, make the optical fiber grating sensing
Device is not contacted less than the sensing unit of upper surface and the fiber-optic grating sensor that the lower layer encapsulates with the first placement section；
If checking upper surface of the fiber-optic grating sensor less than lower layer encapsulation and the optical fiber grating sensing
The sensing unit of device is not contacted with first placement section, then closes upper layer encapsulation with lower layer's cap and fix.
The above-mentioned fiber-optic grating sensor encapsulating structure suitable for hot environment of the present invention at least has the following advantages that：Energy
It is enough that fiber grating progress protectiveness encapsulation can be effectively protected fiber grating especially under to hot conditions,
And after being encapsulated to fiber-optic grating sensor using the encapsulating structure of the present invention, when in use, when fiber-optic grating sensor still
Can be directly Nian Jie with part to be measured, it avoids and causes measurement error since encapsulating structure strains the problem of transmitting, and use two
Point type bonding way, bonding portion are located at the non-sensing unit of fiber-optic grating sensor, effectively prevent adhesive for optical fiber light
The performance of grid itself has an impact, and encapsulating structure limits the region of viscose glue, easy to operate, and bonding is easy for installation, fast
It is prompt.
In addition, the fiber-optic grating sensor packaging method suitable for hot environment that the present invention is above-mentioned, encapsulation is simple, fast
Victory, the quality that can ensure encapsulation, and before fiber-optic grating sensor is bonded in part to be measured, fiber grating can be passed
Sensor, which is carried out, to be fixed temporarily.
Description of the drawings
Fig. 1 is lower layer's encapsulation top structure schematic diagram in the embodiment of the present invention one；
Fig. 2 is the upper layer encapsulation top structure schematic diagram in the embodiment of the present invention one；
Fig. 3 is the upper layer package bottom structural schematic diagram in the embodiment of the present invention one；
Fig. 4 is the encapsulating structure assembling schematic diagram in the embodiment of the present invention one；
Fig. 5 is bottom schematic view after the encapsulating structure assembly in the embodiment of the present invention two；
Fig. 6 is the upper layer encapsulation top structure schematic diagram in the embodiment of the present invention three；
Fig. 7 is that the upper layer in the embodiment of the present invention three encapsulates lateral structural schematic diagram；
Fig. 8 is lower layer's encapsulation top structure schematic diagram in the embodiment of the present invention three；
Fig. 9 is lower layer's package bottom structural schematic diagram in the embodiment of the present invention three；
Figure 10 is the encapsulating structure assembling schematic diagram in the embodiment of the present invention three；
Figure 11 is schematical top view after the encapsulating structure assembly in the embodiment of the present invention three；
In figure：101：Upper layer encapsulates；102：Glue injection part；103：Hole for injecting glue；104：Heating wire；105：Fasten protrusion；201：
Lower layer encapsulates；202：Optical fiber fixed hole；203：Fiber-optic grating sensor.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
As shown in Figures 1 to 4, a kind of fiber-optic grating sensor suitable for hot environment provided in an embodiment of the present invention seals
Assembling structure, including upper layer encapsulation 101 and lower layer's encapsulation 201, lower layer's encapsulation 201 are set there are two spaced optical fiber fixed hole
202, for fiber-optic grating sensor 203 to be fixed on part to be measured using high-temperature adhesives.Preferably, high-temperature adhesives are optional
With Resbond 989FS, 940HT Powder or other similar products.
Optical fiber placement section is additionally provided in lower layer's encapsulation 201, optical fiber placement section passes through two optical fiber fixed holes, and by two
Optical fiber fixed hole 202 is divided into the first placement section, the second placement section and third placement section, and the first placement section is located at two optical fiber
Between fixed hole, the sensing unit for placing fiber-optic grating sensor 203, the second placement section and third placement section are located at
The outside of connected optical fiber fixed hole 202, for being fixed temporarily fiber-optic grating sensor using normal temperature adhesive agent
203.Preferably, acrylic adhesive, 502 bonding agents or other similar products can be selected in normal temperature adhesive agent.
Upper layer encapsulation 101 includes two glue injection parts 102, and two glue injection parts 102 are right with two optical fiber fixed holes 202 respectively
It answers, hole for injecting glue 103 is equipped at the top of glue injection part.
Preferably, the shape and size of upper layer encapsulation 101 and lower layer's encapsulation 201 can be according to fiber-optic grating sensors 203
The size of sensing unit be designed.In the present embodiment, upper layer encapsulation 101 and lower layer's encapsulation 201 correspond to phase respectively to be long with width
Deng flat type cuboid, when installation, upper layer encapsulation 101 is arranged in the surface of lower layer's encapsulation 201, upper with lower layer encapsulation 201
Surface is fixedly connected；The lower surface of lower layer's encapsulation 201 is connect (in the case of as shown in Figure 1 and Figure 4) with part surface to be measured.
As shown in Figure 1, lower layer encapsulation 201 be equipped with optical fiber fixed hole 202, optical fiber fixed hole 202 be through-hole, two
Minimum range between optical fiber fixed hole 202 is more than the sensing unit of fiber-optic grating sensor 203.Preferably, optical fiber is fixed logical
The minimum range that hole 202 senses area edge with fiber-optic grating sensor 203 is 4~5mm.
The shape and size of optical fiber fixed hole 202 can design according to actual needs, can be with when injecting high-temperature adhesives
Optical fiber fixed hole 202 is filled, can not also be filled.Preferably, in the case where not filling, fiber-optic grating sensor 203
It is Nian Jie with part to be measured, it is not Nian Jie with encapsulating structure, shadow of the encapsulating structure to fiber-optic grating sensor 203 can be further reduced
It rings, improves the accuracy of measurement.It is further preferred that optical fiber fixed hole 202 is circular through hole, diameter range is 4~5mm.
As shown in Figure 1, the optical fiber placement section for placing fiber-optic grating sensor 203 is additionally provided in lower layer's encapsulation 201,
In, the first placement section, the second placement section and third placement section are groove, and the groove depth of the first placement section is more than the second placement section
With the groove depth of third placement section.Optical fiber placement section can accommodate fiber-optic grating sensor 203 completely, that is, work as fiber-optic grating sensor
203 when being placed in optical fiber placement section, not higher than the upper surface of lower layer's encapsulation.After upper layer encapsulation 101 encapsulates 201 lid conjunctions with lower layer,
The lower surface of upper layer encapsulation 101 is not contacted with fiber-optic grating sensor 203.So that measurement result is more accurate, fiber grating
Sensor 203 should use up can close to part to be measured, therefore the slot bottom of optical fiber placement section do not answer it is blocked up, it is preferable that the second placement section and the
The thickness of the slot bottom of three placement sections is 0.1~1.5mm, further preferably 0.1~0.5mm.
The width of second placement section and third placement section can be according to the diameter design of fiber-optic grating sensor 203.Preferably,
The width of second placement section and third placement section is equal, and more than the diameter of fiber-optic grating sensor 203, the width of the first placement section
Width of the degree more than the second placement section and third placement section.The sensing unit of fiber-optic grating sensor 203 after encapsulation not with optical fiber
Placement section contacts, and prevents encapsulating structure from being impacted to the function of 203 sensing unit of fiber-optic grating sensor.
As shown in Figures 2 and 3, upper layer encapsulation 101 include two glue injection parts 102, two glue injection parts 102 respectively with two light
Fine fixed hole 202 corresponds to, and when injecting adhesive into optical fiber fixed hole 202, glue injection part 102 provides constraints.Preferably,
Glue injection part 102 can avoid adhesive from being carried over upper layer encapsulation 101, prevent from bonding in the bowl-type of back-off when injecting adhesive
Practical application is interfered in agent because in irregular shape, plays the role of protecting adhesive spots.The bottom of glue injection part 102 is circle, diameter
Ranging from 4~5mm.It is further preferred that the bottom of glue injection part 102 is less than optical fiber fixed hole 202, avoid injecting excessive viscous
Mixture.
102 top (in the case of shown in Fig. 2) of glue injection part is equipped with hole for injecting glue 103, it is preferable that hole for injecting glue 103 is circle, note
The diameter in glue hole 103 is less than the diameter of 102 bottom of glue injection part, and the diameter range of hole for injecting glue 103 is 2~3mm, preferably 2mm.When
When upper layer encapsulation 101 is with lower layer's 201 lid conjunction of encapsulation, the hole for injecting glue 103 of glue injection part 102 is located at right over optical fiber fixed hole 202,
Hole for injecting glue 103 is arranged concentrically with optical fiber fixed hole 202.The injection for carrying out adhesive by hole for injecting glue 103 by glue injection equipment, glues
Mixture injection fibre fixed hole 202, fiber-optic grating sensor 203 and part to be measured are adhesively fixed.
Adhesive is injected using encapsulating structure provided by the embodiment, it is not only simple and practicable, but also inject the position of adhesive
It is more accurate, clear, not only can be to avoid accidentally touching adhesive or fiber grating during drying, but also can protect after the drying
Adhesive spots, and be conducive to determine the position of adhesive spots, when use, can be considered as adhesive spots according to the center of hole for injecting glue 103.
As shown in Figure 3, it is preferable that for so that fiber-optic grating sensor encapsulating structure is more suitable for encapsulation under the high temperature conditions
The lower surface of the fiber-optic grating sensor that (such as 1000~1200 DEG C) use, upper layer encapsulation 101 is equipped with heating wire 104, electric heating
Silk 104 is embedded or is bonded in upper layer encapsulation 101, is arranged around glue injection part 102, is used for after injecting adhesive, closely right
Solidification, the drying process of speed adhesive is dried in adhesive.It is further preferred that heating wire 104 to glue injection part 102 away from
From for 1~2mm.The operating temperature of heating wire 104 is preferably 40~50 DEG C.Since high-temperature adhesives drying time is longer, use
Heating wire 104 heats high-temperature adhesives, can both ensure dry rapid, can also avoid dry too fast causing high temperature viscous
Mixture is chapped.
As shown in figure 4, in use, fiber-optic grating sensor 203 is placed in optical fiber placement section, sensing unit is located at two light
The first placement section between fine fixed hole 202 after encapsulating fiber-optic grating sensor 203, lower layer's encapsulation 201 is fixed on and is waited for
It surveys on part, further according to needing into optical fiber fixed hole 202 to inject adhesive from hole for injecting glue 103, with adhesive by the optical fiber light
Gate sensor 203 is bonded on part to be measured, you can completes the installation of 203 encapsulating structure of fiber-optic grating sensor.It needs to illustrate
It is that in order to ensure when in use, encapsulating structure does not interfere with fiber-optic grating sensor 203, the adhesive injected by hole for injecting glue 103
Metering should be controlled, should not be adhered in lower layer's encapsulation 201 or upper layer encapsulation 101.
A kind of fiber-optic grating sensor encapsulating structure suitable for hot environment is present embodiments provided, existing skill has been filled up
Do not have to protect the blank of the encapsulating structure of fiber-optic grating sensor under the high temperature conditions in art.Encapsulating structure energy in the present embodiment
It is enough that protectiveness encapsulation is carried out to fiber grating, fiber grating is effectively protected, the optical fiber grating sensing in the present embodiment
It is directly Nian Jie with part to be measured after device 203 is packed, it avoids since the problem of strain is transmitted causes measurement error, and use
Two point form bonding way effectively prevents adhesive and is had an impact to the performance of fiber grating itself, and encapsulating structure is to viscose glue
Region is limited, and bonding is easy for installation, quick.Encapsulating structure in the present embodiment further comprises heating wire 104, can be right
Adhesive carries out heating drying, when effectively reducing installation optical fibre raster package structure, injects the drying time of adhesive.
Embodiment two
As shown in figure 5, the present embodiment two and embodiment one are essentially identical, the difference is that the second placement section and third are put
The portion of setting is groove, and the first placement section is strip pore structure, i.e. is connected between two optical fiber fixed holes 202, it is ensured that optical fiber light
The sensing unit of gate sensor 203 is neither contacted with upper layer encapsulation 101, and also not encapsulating 201 with lower layer contacts.Due to high-temperature adhesives
Viscosity is big, even if being connected between two optical fiber fixed holes 202, high-temperature adhesives will not flow into fiber-optic grating sensor
203 sensing unit does not influence the performance of fiber-optic grating sensor 203.
Embodiment three
As shown in Fig. 6 to 11, the present embodiment additionally provides a kind of fiber-optic grating sensor encapsulation suitable for hot environment
Structure, the present embodiment three and embodiment one are essentially identical, and something in common repeats no more, the difference is that：
Specific in the present embodiment, lower layer's encapsulation 201 is flat type cuboid, two be arranged at intervals in lower layer's encapsulation 201
A optical fiber fixed hole 202 is that open top is small, the big bellmouth of bottom opening.Preferably, inside optical fiber fixed hole 202
Cavity in back-off it is bowl-shape.
Upper layer 101 structures of encapsulation are more more slim than lower layer's encapsulation 201, inside two hole for injecting glue 103 in upper layer encapsulation 101
It is in infundibulate, as open top is big, the small bellmouth of bottom opening, and downwardly projecting (such as Fig. 7 in bottom of hole for injecting glue 103
It is shown), it is formed and fastens protrusion 105.The size and the opening at 202 top of optical fiber fixed hole for fastening protrusion 105 match.Encapsulation
When, it as shown in Figure 10, fastens protrusion 105 and is inserted into the open top of optical fiber fixed hole 202, by upper layer encapsulation 101 and lower layer
Encapsulation 201 fastens.
Preferably, 103 top of hole for injecting glue is circle, and diameter range is 2~3mm, raised 105 external diametrical extents of fastening of bottom
For 1~2mm, 202 bottom of optical fiber fixed hole is circle, and diameter range is 4~5mm.
As shown in Figure 8 and Figure 9, it is clear that in the present embodiment, the first placement section, the second placement section and third placement section
Groove depth is not answered too small, it is preferable that the groove depth of the first placement section and the second placement section ranging from 2~3mm.
When injecting glue, from hole for injecting glue 103 into optical fiber fixed hole 202 injecting glue, until filling optical fiber fixed hole 202.Bowl
The optical fiber fixed hole 202 of shape can be limited and limited the quantity to the high-temperature adhesives of injection, be easy to determine bounding point, and can
Ensure the fixed point good bonding of fiber-optic grating sensor 203 and part to be measured, while preventing adhesive because in irregular shape and dry
Practical application is disturbed, plays the role of protecting adhesive spots.
Preferably, upper layer encapsulation 101 is additionally provided with heating wire 104, and the upper surface encapsulated on upper layer is arranged in heating wire 104, on
Layer encapsulation 101 is equipped with the groove around glue injection part 102, and for being embedded heating wire 104, the operating temperature of heating wire 104 is 40
~50 DEG C.Obviously, the position of heating wire 104 can also adjust according to actual needs.
Example IV
The present invention also provides a kind of fiber-optic grating sensor packaging methods suitable for hot environment, using such as above-mentioned
Encapsulating structure in one embodiment carries out the encapsulation of fiber-optic grating sensor 203, it is preferable that includes the following steps：
Fiber-optic grating sensor 203 is placed in optical fiber placement section, and is rendered as straight condition, and optical fiber grating sensing
The sensing unit of device 203 is located in the first placement section.
Fiber-optic grating sensor 203 is carried out temporarily admittedly using normal temperature adhesive agent in the second placement section and third placement section
It is fixed, so that fiber-optic grating sensor 203 is kept straight condition.For example, normal temperature adhesive agent may be used by fiber-optic grating sensor 203
One end is bonded in the second placement section, and the other end is bonded in third placement section.
By upper layer encapsulation 101 with lower layer encapsulation 201 lid close fix, and keep two hole for injecting glue 103 respectively with two optical fiber
Fixed hole 202 is corresponding, and when ensureing fiber-optic grating sensor 203 being mounted on part to be measured, high-temperature adhesives can be from note
Glue hole 103 enters optical fiber fixed hole 202, and fiber-optic grating sensor 203 is bonded on part to be measured.
Preferably, upper layer encapsulation 101 is adhesively fixed with 201 use high-temperature adhesives of lower layer encapsulation, and after being adhesively fixed, on
Layer encapsulation 101 two hole for injecting glue 103 respectively with lower layer encapsulation 201 two optical fiber fixed holes 202 be arranged concentrically.Another
In one embodiment, upper layer encapsulation 101 and lower layer encapsulation 201 can also by being fastened, such as by fasten protrusion 105 and
The open top of optical fiber fixed hole 202 is matched and is fixed.
It is further preferred that before upper layer encapsulation 101 and 201 lid conjunction of lower layer's encapsulation is fixed,
Check whether fiber-optic grating sensor 203 encapsulates 201 upper surface higher than lower layer；
Check whether the sensing unit of fiber-optic grating sensor 203 contacts with the first placement section；
If checking upper surface of the fiber-optic grating sensor 203 higher than lower layer's encapsulation 201 and/or fiber-optic grating sensor
203 sensing unit is contacted with the first placement section, then needs adjustment fiber-optic grating sensor 203, keep fiber-optic grating sensor 203 low
It is not contacted with the first placement section in the sensing unit of the upper surface of lower layer's encapsulation 201 and fiber-optic grating sensor 203；
If checking upper surface of the fiber-optic grating sensor 203 less than lower layer's encapsulation 201 and fiber-optic grating sensor 203
Sensing unit is not contacted with the first placement section, then upper layer encapsulation 101 is encapsulated 201 lid conjunctions with lower layer fixes.
In use, when having heating wire 104 in 203 encapsulating structure of fiber-optic grating sensor, by fiber-optic grating sensor 203
After being bonded in part to be measured, high-temperature adhesives are heated by heating wire 104, heating temperature is 40~50 DEG C.Solidification is completed
Afterwards, fiber-optic grating sensor 203 installs, you can comes into operation.
Under working condition, the operating temperature of fiber-optic grating sensor 203 at 1000 DEG C or more, steam completely by normal temperature adhesive agent
Hair, encapsulating structure are detached with fiber-optic grating sensor 203, and encapsulating structure is avoided to impact fiber-optic grating sensor 203.
A kind of fiber-optic grating sensor packaging method suitable for hot environment is present embodiments provided, it can be to optical fiber light
Grid carry out protectiveness encapsulation, and encapsulation is simple, quick, and fiber-optic grating sensor can be convenient and be accurately bonded by while using
On part to be measured, work under the high temperature conditions, the structure of encapsulation does not influence the sensing unit of fiber-optic grating sensor, avoid due to
The problem of encapsulating structure strain is transmitted causes measurement error, and avoids adhesive and the performance of fiber grating itself is generated
It influences.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of fiber-optic grating sensor encapsulating structure suitable for hot environment, it is characterised in that：Including upper layer encapsulation and under
Layer encapsulation；
Lower layer's encapsulation is set there are two spaced optical fiber fixed hole, for utilizing high-temperature adhesives by the optical fiber light
Gate sensor is fixed on part to be measured；And
Optical fiber placement section, the optical fiber placement section passes through two optical fiber fixed holes, and is fixed and lead to by two optical fiber
Hole is divided into the first placement section, the second placement section and third placement section, and first placement section, which is located at two optical fiber, to be fixed
Between through-hole, the sensing unit for placing the fiber-optic grating sensor, second placement section and the third placement part
The outside of the optical fiber fixed hole that Wei Yu be not connected, for being fixed temporarily the optical fiber light using normal temperature adhesive agent
Gate sensor；
Wherein, first placement section, the second placement section and third placement section are groove, and the groove depth of the first placement section is more than
The groove depth of second placement section and third placement section；
The upper layer encapsulation includes two glue injection parts, and two glue injection parts are corresponding with two optical fiber fixed holes respectively,
Hole for injecting glue is equipped at the top of the glue injection part.
2. fiber-optic grating sensor encapsulating structure according to claim 1, it is characterised in that：The optical fiber of lower layer's encapsulation
Fixed hole is that open top is small, the big bellmouth of bottom opening, and the hole for injecting glue bottom of the upper layer encapsulation is downwardly projecting, is formed
The open top size of fastening protrusion, the fastening protrusion and the optical fiber fixed hole matches.
3. according to claims 1 or 2 any one of them fiber-optic grating sensor encapsulating structure, it is characterised in that：The upper layer
Encapsulation is additionally provided with heating wire, and the heating wire is arranged around the glue injection part.
4. fiber-optic grating sensor encapsulating structure according to claim 3, it is characterised in that：The work temperature of the heating wire
Degree is 40~50 DEG C.
5. fiber-optic grating sensor encapsulating structure according to claim 1, it is characterised in that：Second placement section and
The thickness of the slot bottom of three placement sections is 0.1~0.5mm.
6. fiber-optic grating sensor encapsulating structure according to claim 1, it is characterised in that：The top of the hole for injecting glue is in
Circle, diameter range are 2~3mm；The bottom of the optical fiber fixed hole is rounded, and diameter range is 4~5mm.
7. a kind of fiber-optic grating sensor encapsulating structure suitable for hot environment, it is characterised in that：Including upper layer encapsulation and under
Layer encapsulation；
Lower layer's encapsulation is set there are two spaced optical fiber fixed hole, for utilizing high-temperature adhesives by the optical fiber light
Gate sensor is fixed on part to be measured；And
Optical fiber placement section, the optical fiber placement section passes through two optical fiber fixed holes, and is fixed and lead to by two optical fiber
Hole is divided into the first placement section, the second placement section and third placement section, and first placement section, which is located at two optical fiber, to be fixed
Between through-hole, the sensing unit for placing the fiber-optic grating sensor, second placement section and the third placement part
The outside of the optical fiber fixed hole that Wei Yu be not connected, for being fixed temporarily the optical fiber light using normal temperature adhesive agent
Gate sensor；
Wherein, second placement section and third placement section are groove, and first placement section is strip pore structure；
The upper layer encapsulation includes two glue injection parts, and two glue injection parts are corresponding with two optical fiber fixed holes respectively,
Hole for injecting glue is equipped at the top of the glue injection part.
8. a kind of fiber-optic grating sensor packaging method suitable for hot environment, which is characterized in that using such as claim 1-7
Any one of them is suitable for the encapsulation of the fiber-optic grating sensor encapsulating structure progress fiber-optic grating sensor of hot environment, envelope
Dress method is as follows：
Fiber-optic grating sensor is placed in optical fiber placement section, and is rendered as straight condition, and the fiber-optic grating sensor
Sensing unit be located in first placement section；
The fiber-optic grating sensor is fixed temporarily using normal temperature adhesive agent in the second placement section and third placement section,
The fiber-optic grating sensor is set to keep straight condition；
By the upper layer encapsulation with lower layer's cap close fix, and keep two hole for injecting glue respectively with two light
Fine fixed hole is corresponding, and when ensureing the fiber-optic grating sensor being mounted on part to be measured, high-temperature adhesives can be from institute
It states hole for injecting glue and enters the optical fiber fixed hole, and the fiber-optic grating sensor is bonded on the part to be measured.
9. fiber-optic grating sensor packaging method according to claim 8, it is characterised in that：Upper layer encapsulation with it is described
Lower layer's encapsulation is adhesively fixed using high-temperature adhesives, and after being adhesively fixed, point of two hole for injecting glue of the upper layer encapsulation
The two optical fiber fixed holes not encapsulated with the lower layer are arranged concentrically.
10. fiber-optic grating sensor packaging method according to claim 8, which is characterized in that encapsulated by the upper layer
It is closed with lower layer's cap before fixing,
Check whether the fiber-optic grating sensor is higher than the upper surface of lower layer encapsulation；
Check whether the sensing unit of the fiber-optic grating sensor contacts with the first placement section；
If checking upper surface of the fiber-optic grating sensor higher than lower layer encapsulation and/or the fiber-optic grating sensor
Sensing unit contacted with the first placement section, then need to adjust the fiber-optic grating sensor, keep the fiber-optic grating sensor low
It is not contacted with the first placement section in the sensing unit of the upper surface of lower layer encapsulation and the fiber-optic grating sensor；
If checking upper surface of the fiber-optic grating sensor less than lower layer encapsulation and the fiber-optic grating sensor
Sensing unit is not contacted with first placement section, then closes upper layer encapsulation with lower layer's cap and fix.
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