CN108204866B - A kind of non-calibrating tandem type fiber grating temperature sensor preparation method and product - Google Patents
A kind of non-calibrating tandem type fiber grating temperature sensor preparation method and product Download PDFInfo
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- CN108204866B CN108204866B CN201810006367.2A CN201810006367A CN108204866B CN 108204866 B CN108204866 B CN 108204866B CN 201810006367 A CN201810006367 A CN 201810006367A CN 108204866 B CN108204866 B CN 108204866B
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- 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
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Abstract
The invention discloses a kind of non-calibrating tandem type fiber grating temperature sensors and preparation method thereof.The method includes the steps: (1) in the groove of horizontal base plate it is embedded in engaged therewith package core part；(2) predeterminated position high standard part will be determined be fixed on recess portion in the middle part of the package core part；(3) optical fiber is crossed and described determines high standard part and the grating is tightly attached to determine above high standard part；(4) it removes；(5) it encapsulates.The sensor includes package casing part, package core part and the optical fiber for being carved with grating；The optical fiber is fixed with the package core part, and the middle part that grating is exposed to the package core part slots and is in relaxed state；Outside the package casing part fixed and package core part nested with the package core part for being fixed with optical fiber.Non-calibrating tandem type fiber grating temperature sensor production method provided by the invention, stability is good, and batch consistency is good, only needs once to demarcate with batch products.
Description
Technical field
The invention belongs to fiber grating fields, more particularly, to a kind of non-calibrating tandem type fiber grating temperature sensor
Device.
Background technique
Fiber grating temperature sensor is because the characteristics such as its distinctive electromagnetism interference, electrical insulating property, explosion-proof are many special
Field is used widely development, such as electric power thermometric, petroleum and petrochemical industry monitoring temperature, subway tunnel alarm.Fiber grating temperature
Spending sensor includes Series FPB and parallel FPB, and wherein tandem type fiber grating temperature sensor when connecting in channel because not needing
Light splitting, to introduce, loss is small, and channel sensor quantity promotes 1 times than in parallel.
Tandem type fiber grating is sensitive simultaneously to temperature and strain because of its special physical property, this allows for working as
Need to need shadow of the special packaging protection to completely cut off another physical quantity variation when being monitored one of physical quantity
It rings, or realizes the accurate measurements of temperature strain by distinctive demodulating algorithm.Common method during temperature monitoring
It is by peculiar encapsulating structure to avoid strain transmitting bring influence, but because that can not accomplish temperature sensitivity in encapsulation process
The consistency of coefficient is spent, therefore every tandem type fiber grating temperature sensor is required by the scale of thermometer after packaging is accomplished
It is fixed, the reflection kernel wavelength sensed at each temperature is recorded, and data are carried out according to the wavelength recorded-temperature corresponding data and are intended
Conjunction obtains the parameters of tandem type fiber grating temperature sensor.
Accurate wavelength-temperature corresponding data in order to obtain demarcates complex process, and the time is long, inefficiency, is not suitable for criticizing
Amount production.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of non-calibrating tandem type fiber gratings
Temperature sensor preparation method and product, its object is to eliminate the stress of fiber grating by the consistent slackness of height, and
The optical fiber Bragg grating encapsulation is got up so that the fiber grating is almost not affected by force, the optical parameter variation of grating by
Influence consistency to temperature is high, and a collection of product only needs calibration primary, without each tandem type fiber grating temperature sensor of calibration
Thus device solves the existing each product of tandem type fiber grating temperature sensor and requires individually to demarcate, complex process, time
The technical issues of length, inefficiency.
To achieve the above object, according to one aspect of the present invention, a kind of non-calibrating tandem type fiber grating temperature is provided
Spend transducer production method, which comprises the following steps:
(1) it is embedded in package core part engaged therewith in the groove of horizontal base plate, so that package core part both ends
Through-hole expose the substrate surface；
(2) predeterminated position high standard part will be determined be fixed on recess portion in the middle part of the package core part；
(3) optical fiber that will be carved with grating passes through the through-hole at package core part both ends, and the optical fiber, which is crossed, described determines high standard
Part simultaneously is tightly attached to the grating to determine above high standard part；
(4) optical fiber is fixed in package core part, detaches and described determines high standard part and by the package core part
It is removed from substrate；
(5) by the band optical fiber package core part and package casing part fixing assembling, the non-calibrating tandem type is obtained
Grating temperature sensor.
Preferably, the non-calibrating tandem type fiber grating temperature sensor preparation method, the horizontal base plate have
At least one groove.
Preferably, the non-calibrating tandem type fiber grating temperature sensor preparation method, the horizontal base plate have
For producing in batches, the multiple groove is preferably arranged side by side multiple grooves.
Preferably, the non-calibrating tandem type fiber grating temperature sensor preparation method, the package core part two
End is the cylindrical body with through-hole, and middle part is recess portion, and the recess portion has for the predeterminated position for determining high standard part to be arranged.
Preferably, the non-calibrating tandem type fiber grating temperature sensor preparation method, the package core part institute
Stating recess portion is semicylinder.
Preferably, the non-calibrating tandem type fiber grating temperature sensor preparation method, it is described to determine high standard part height
Degree is more than 125 microns of described recess depths or more.
Preferably, the non-calibrating tandem type fiber grating temperature sensor preparation method, it is described to determine high standard part and be
Strip, cross section are preferably semicircle.
Preferably, the non-calibrating tandem type fiber grating temperature sensor preparation method, the package casing part are
Metal material.
It is according to the invention that another aspect provides a kind of non-calibrating tandem type fiber grating temperature sensor, features
It is, including package casing part, package core part and the optical fiber for being carved with grating；The optical fiber and the package core part are solid
Fixed, the middle part that grating is exposed to the package core part slots and is in relaxed state；The package casing part with it is described solid
Surely have outside the fixation of package core part nesting and the package core part of optical fiber；The optical fiber is in the part of recess portion, length
Degree is more than that recess length is no more than 1mm.
Preferably, the non-calibrating tandem type fiber grating temperature sensor, package core part both ends be with
The cylindrical body of through-hole, middle part are recess portion, are had for the predeterminated position for determining high standard part to be arranged, and preferably middle part is semicylinder,
For stainless steel, copper alloy, aluminium alloy or ceramic member；The package casing part, the diameter phase of internal diameter and the package core part
Cooperation, enables the package core part to be inserted in the package casing part；It is preferred that package casing part both ends have for
The screw thread that optical cable fixing piece is threadedly engaged.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
Non-calibrating tandem type fiber grating temperature sensor production method provided by the invention, stability is good, and batch is consistent
Property is good, only needs once to demarcate with batch products, determine high standard part and package substrate be used cooperatively after can be very well make light
Grid are in relaxed state, and fiber grating will not be caused to be broken because of operation error.
Non-calibrating tandem type fiber grating temperature sensor provided by the invention can make optical fiber light with the use of post package
Grid relaxation degree is controllable, and batch is consistent, goes to calculate other sensings with any one sensor parameters in batch sensor in use
Acquired results calculate acquired results mean square deviation less than 0.5 with oneself parameter when the temperature value of device, and temperature error and true knot
For fruit error within ± 2 DEG C, this makes it possible to obtain the temperature parameters between sensor to have good interchangeability, greatly reduces biography
Parameter calibration workload of the sensor in batch production process.
Further, the present invention provides tandem type temperature sensor, and the present invention uses encased core part for semicircle in structure
Type structure, it is more stable compared with plate, and the volume for reducing inner air can carry out temperature transmitting faster.
Detailed description of the invention
Fig. 1 is non-calibrating tandem type fiber grating temperature sensor preparation method substrate provided by the invention and determines high standard
Part scheme of installation；
Fig. 2 is that non-calibrating tandem type fiber grating temperature sensor preparation method provided by the invention is equipped with fiber grating
Package core part schematic diagram；
Fig. 3 is non-calibrating tandem type fiber grating temperature sensor structural schematic diagram provided by the invention.
In all the appended drawings, identical appended drawing reference is used to denote the same element or structure, in which: 1 is package core
Part, 2 is determine high standard part, and 3 be optical fiber, and 4 be grating, and 5 be substrate, and 6 be package casing part, and 7 be optical cable fixing piece, and 8 be optical cable,
9 be Loose tube, and 11 be the glue Gu Chu of package core part and package casing part, and 12 is solid for the glue of the package core part and optical fiber
Place.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
Non-calibrating tandem type fiber grating temperature sensor preparation method provided by the invention, comprising the following steps:
(1) it is embedded in package core part engaged therewith in the groove of horizontal base plate, so that package core part both ends
Through-hole expose the substrate surface, as shown in Figure 1；
The horizontal base plate has at least one groove, preferably has multiple grooves for producing in batches, the multiple recessed
Slot is preferably arranged side by side, so that being used to be arranged the predeterminated position for determining high standard part on the package core part of its fixation is in one directly
On line.The preferably described groove is cylinder, and cross section is and the matched arch of package core part radian, the groove half
Between 1-3 mm, depth is between 0.9-2.9mm, and length is between 20-60mm for diameter.
Package core part both ends are the cylindrical body with through-hole, and middle part is recess portion, and the recess portion has for being arranged
Determine the predeterminated position of high standard part, the preferably described recess portion is semicylinder, is stainless steel, copper alloy, aluminium alloy or ceramic member.
The package core part, total length between 20-50mm, diameter between 2-6mm, the length of recess portion 15-45mm it
Between, recess depths are between 1-5mm.
(2) predeterminated position high standard part will be determined be fixed on recess portion in the middle part of the package core part, as shown in Figure 1；
Described to determine high standard part, height is transversal more than 125 microns of described recess depths or more, preferably strip
Face is preferably semicircle.When the multiple package core part is embedded in the substrate and it is used to be arranged and determines high standard part side by side
When predeterminated position is on straight line, the strip determines the setting of high standard part on the straight line, completes in multiple encapsulation
Core part loads described the step of determining high standard part.Preferred embodiment, the length for determining high standard part are greater than the substrate width.
(3) optical fiber that will be carved with grating passes through the through-hole at package core part both ends, and the optical fiber, which is crossed, described determines high standard
Part simultaneously is tightly attached to the grating to determine above high standard part, as shown in Figure 1；Specifically:
It is penetrated in one end through-hole of the encapsulated kernel part of optical fiber for having grating, cross and is close to described determine high standard
Part is pierced by from the other end through-hole of the package core part, and the grating is made to be in the surface for determining high standard part,
Then the optical fiber and the package core part are fixed from the package core part recess portion both ends using adhesive；The gluing
The preferred high-temperature plastic of agent.
It is preferred that package core part both ends outer fibers have Loose tube, respectively with corresponding package core part both ends
It is fixed.
(4) optical fiber is fixed in package core part, detaches and described determines high standard part and by the package core part
It is removed from substrate, as shown in Figure 2；
(5) the package casing part fixing assembling by described with optical fiber package core part and metal material obtains described exempt from
Tandem type grating temperature sensor is demarcated, as shown in Figure 3.Specifically:
The package casing part is inserted in from package core part side, is fixed using optical cable fixing piece and the package casing part
Cooperation, as follows:
The side of first optical cable fixing piece and the package casing part is detachably fixed by (5-1)；
(5-2) is by the package core part and the first optical cable fixing piece push-tight and fixation；
(5-3) fixes one end of the package core part and package casing part opposite side inner wall；
(5-4) fixes the opposite side of the second optical cable fixing piece and the package casing part；
(5-5) splits the side of the first optical cable fixing piece and the package casing part；
(5-6) fixes the other end of the package core part and the side inner wall of the package casing part；
(5-7) fixes the side of the first optical cable fixing piece and the package casing part.
Preferably, in above-mentioned steps each component be fixed to each other using flexible high-temperature resistant sealant filling.
It is attached between the optical cable fixing piece and outer jointing jacket optical cable using crimping mode.The outer protection optical cable is
Outer protection optical cable with metal armouring structure or the outer protection optical cable without metal armouring structure.
For this method when assembling fiber grating temperature sensor kernel, optical fiber keeps relaxation in controlled range, is not easy to lead
Cause grating fracture, high yield rate.Importantly, this method ensure that grating is in the consistency of relaxed state, grating is answered
It is consistent that power influences height, while finished product fiber grating temperature sensor is hardly influenced by extraneous stress, therefore is only needed to system
A batch of product, which carries out primary calibration, can be obtained the corresponding data of the batch temperature and sensor reflection kernel wavelength, thus
Obtain each parameter of the batch temperature sensor.For the tandem type fiber-optic grating sensor of the batch, without demarcating one by one.
Tandem type fiber grating temperature sensor provided by the invention, including package casing part, package core part and quarter
There is the optical fiber of grating；The optical fiber is fixed with the package core part, and grating is exposed in the middle part of the package core part and opens
Slot is simultaneously in relaxed state；The package casing part fixed and encapsulation nested with the package core part for being fixed with optical fiber
Outside kernel part.
Package core part both ends are the cylindrical body with through-hole, and middle part is recess portion, have and determine high standard for being arranged
The predeterminated position of part, preferably middle part are semicylinder, are stainless steel, copper alloy, aluminium alloy or ceramic member.The package core
Part, total length is between 20-50mm, and diameter is between 2-6mm, and the length of recess portion is between 15-45mm, recess depths
Between 1-5mm.
The package casing part, internal diameter are matched with the diameter of the package core part, so that the package core part
The package casing part can be inserted in.It is preferred that package casing part both ends have screw thread, it is threadedly engaged with optical cable fixing piece.
The following are embodiments:
A kind of non-calibrating tandem type fiber grating temperature sensor preparation method, comprising the following steps:
(1) it is embedded in package core part engaged therewith in the groove of horizontal base plate, so that package core part both ends
Through-hole expose the substrate surface；
The horizontal base plate, width 50mm have 7 grooves in width direction, are arranged side by side.The groove is cylinder,
Its cross section is and the matched arch of package core part radian, the groove radius 2.45mm, depth 2mm, length 43mm.
Package core part both ends are the cylindrical body with through-hole, and middle part is that recess portion is semicylinder, and intermediate position is used
High standard part is determined in setting, is ceramic member.The package core part, total length 40mm, diameter 4.9mm, recess portion
Length 34mm, both ends aperture diameter 0.9mm.
(2) predeterminated position high standard part will be determined be fixed on recess portion in the middle part of the package core part；
Described to determine high standard part, height 2.3mm is strip, and length 50mm has 45 ° of lead angles, and cross section is half
It is round.7 package core parts are embedded in the substrate side by side, and the final version standard component hangs down across 7 package core parts
Directly it is arranged in the package core part, for each package core part, the final version standard component is all disposed within the package core
The middle position of part recess portion.
(3) optical fiber that will be carved with grating passes through the through-hole at package core part both ends, and the optical fiber, which is crossed, described determines high standard
Part simultaneously is tightly attached to the grating to determine above high standard part；Specifically:
The optical fiber and fiber grating are an entirety, are penetrated in the through-hole of encapsulated kernel part one end, around described fixed
High standard part is pierced by from the package core part other end through-hole, and fiber grating should be made to be in after this process and stuck up
The top position risen.It is bonded shown in 12 using high-temperature plastic in Fig. 1.
The 0.9mm Loose tube 9 is penetrated from optical fiber one end, and Loose tube one end and 1 stomidium of kernel part is made to use high temperature resistant
Glue bonding.
(4) optical fiber is fixed in package core part, detaches and described determines high standard part and by the package core part
It is removed from substrate；The kernel part be after glue curing can with substrate and determine high standard part and separate taking-up to form an entirety
As shown in Fig. 2, obtaining whole kernel.
(5) the package casing part fixing assembling by described with optical fiber package core part and metal material obtains described exempt from
Demarcate tandem type grating temperature sensor.Specifically:
The package casing part is inserted in from package core part side, is fixed using optical cable fixing piece and the package casing part
Cooperation, as follows:
The package casing part is inserted in from whole kernel one end is encapsulated, the first optical cable fixing piece by screw thread with it is described
The connection of package casing part, connection procedure are as follows:
First one end is fixed, whole kernel is then pushed against into fixing end；Flexible high-temperature resistant sealant is filled in Fig. 3
In position shown in 11；Screw thread glue will be smeared at second optical cable fixing piece screw thread, after be screwed into and have been filled with refractory seals glue end；It will
First optical cable fixing piece is unscrewed, and smears refractory seals glue by the same way, and be screwed into.
It is attached between the first, second optical cable fixing piece and outer jointing jacket optical cable using crimping mode.The light
It is attached between cable fixing piece and outer jointing jacket optical cable using crimping mode.The outer protection optical cable is band metal armouring structure
Outer protection optical cable.
Embodiment 2
The tandem type fiber grating temperature sensor prepared in embodiment 1 is demarcated and is detected:
The calibration of sensor temperature coefficient:
Fiber grating temperature sensor, because each stop position relaxed state is different, leads to its temperature coefficient after completing encapsulation
Also not identical, here because having obtained good consistency control using determining high standard part and package substrate being assisted to be packaged
System, need to only carry out calibration to one of sensor in the product of same batch can be used to other sensor parameters settings.
Step 1: calibration step-length being chosen according to the temperature range of required calibration and the stated accuracy intentionally got, that is, is being marked
Determine in temperature range at interval of certain temperature record a wavelength it, can choose 10 DEG C, 20 DEG C, 30 DEG C, 40 DEG C as calibration
Step-length, the calibration shorter stated accuracy of step-length are higher.
Step 2: corresponding wavelength value is recorded in each selected temperature spot, generally after temperature reaches selected temperature point
Two hours progress wavelength value records.
Step 3: temperature coefficient being calculated according to fitting formula, is not that absolute linearity becomes because sensor wavelength varies with temperature
Change, in 80 DEG C or more of temperature range, quadratic term formula can be used and be fitted, fitting formula is as follows:
T=a1*Δλ2+a2Δλ+a3
Δ λ is the difference of the wavelength value of the wavelength value that detection obtains and selection reference point, and reference point may be selected temperature and measure model
Enclose the point close to median, a1, a2, a3For parameter to be asked.
Calculating process is as follows:
In above formula matrix n it is corresponding be temperature spot number, when temperature spot number is 9, value is 9.Solve above formula matrix
3 coefficient values in binomial can be solved.
Experimental verification:
It is as follows by recording each number sensor reflection kernel wavelength after equalized temperature within 120 minutes in each temperature:
| No. 1 wavelength value | No. 2 wavelength values | No. 3 wavelength values | No. 4 wavelength values | No. 5 wavelength values | No. 6 wavelength values | No. 7 wavelength values | Temperature value |
| 1537.473 | 1543.548 | 1549.49 | 1552.396 | 1555.434 | 1558.598 | 1561.351 | -30℃ |
| 1537.733 | 1543.805 | 1549.753 | 1552.654 | 1555.693 | 1558.857 | 1561.611 | 0℃ |
| 1538.009 | 1544.083 | 1550.033 | 1552.932 | 1555.973 | 1559.137 | 1561.893 | 30℃ |
| 1538.303 | 1544.38 | 1550.33 | 1553.231 | 1556.271 | 1559.437 | 1562.193 | 60℃ |
| 1538.619 | 1544.697 | 1550.649 | 1553.547 | 1556.588 | 1559.756 | 1562.512 | 90℃ |
| 1538.966 | 1545.048 | 1551.004 | 1553.895 | 1556.935 | 1560.108 | 1562.864 | 120℃ |
Each sensor formula after fitting are as follows:
No. 1: T=-12.034* Δ λ2+105.55Δλ+30.031
No. 2: T=-12.451* Δ λ2+105.27Δλ+30.003
No. 3: T=-11.975* Δ λ2+104.28Δλ+30.12
No. 4: T=-11.978* Δ λ2+105.05Δλ+29.901
No. 5: T=-11.652* Δ λ2+104.74Δλ+29.987
No. 6: T=-12.905* Δ λ2+104.45Δλ+29.955
No. 7: T=-11.773* Δ λ2+104.09Δλ+30.018
The difference of wavelength value is as follows when Δ λ value is the optic fiber grating wavelength value and 30 DEG C that detection obtains in the above fitting formula
Shown in table, unit nanometer.
| No. 1 Δ λ | No. 2 Δ λ | No. 3 Δ λ | No. 4 Δ λ | No. 5 Δ λ | No. 6 Δ λ | No. 7 Δ λ | Temperature value |
| -0.536 | -0.535 | -0.543 | -0.536 | -0.539 | -0.539 | -0.542 | -30℃ |
| -0.276 | -0.278 | -0.28 | -0.278 | -0.28 | -0.28 | -0.282 | 0℃ |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 30℃ |
| 0.294 | 0.297 | 0.297 | 0.299 | 0.298 | 0.3 | 0.3 | 60℃ |
| 0.61 | 0.614 | 0.616 | 0.615 | 0.615 | 0.619 | 0.619 | 90℃ |
| 0.957 | 0.965 | 0.971 | 0.963 | 0.962 | 0.971 | 0.971 | 120℃ |
One group of Δ λ value is arbitrarily chosen in above data and substitutes into other sensor fitting formulas calculating, chooses No. 7 Δ λ here
Numerical value is brought into after other number sensor fitting formulas calculate and obtains calculating temperature value as follows, unit DEG C:
| No. 1 formula | No. 2 formula | No. 3 formula | No. 4 formula | No. 5 formula | No. 6 formula | No. 7 formula | Mean square deviation | Actual temperature value |
| -30.71 | -30.71 | -29.92 | -30.55 | -30.21 | -30.21 | -29.86 | 0.36 | -30℃ |
| -0.69 | -0.67 | -0.24 | -0.68 | -0.48 | -0.46 | -0.27 | 0.19 | 0℃ |
| 30.03 | 30.00 | 30.12 | 29.90 | 29.99 | 29.96 | 30.02 | 0.07 | 30℃ |
| 60.61 | 60.46 | 60.33 | 60.34 | 60.36 | 60.20 | 60.19 | 0.15 | 60℃ |
| 90.76 | 90.39 | 90.08 | 90.34 | 90.36 | 89.98 | 89.94 | 0.29 | 90℃ |
| 121.17 | 120.48 | 120.09 | 120.61 | 120.70 | 119.97 | 119.99 | 0.44 | 120℃ |
It can be seen that from data in above table and brought into terms of other sensing data fitting formulas carry out by No. 7 sensing datas
Obtained temperature value is in close proximity to actual temperature value, and mean square deviation is smaller, and one of transducer calibration can be used completely
Parameter substitutes other sensor parameters, so that transducer calibration workload is greatly reduced, it can fast simple realization mass
The production of non-calibrating fiber grating temperature sensor.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (15)
1. a kind of non-calibrating tandem type fiber grating temperature sensor preparation method, which comprises the following steps:
(1) it is embedded in package core part engaged therewith in the groove of horizontal base plate, so that package core part both ends is logical
Expose the substrate surface in hole；
(2) predeterminated position high standard part will be determined be fixed on recess portion in the middle part of the package core part；
(3) optical fiber that will be carved with grating passes through the through-hole at package core part both ends, and the optical fiber, which is crossed, described determines high standard part simultaneously
Determine above high standard part so that the grating is tightly attached to；
(4) optical fiber is fixed in package core part, detach it is described determine high standard part and by the package core part from base
It is removed on plate；
(5) by the package core part with the optical fiber and package casing part fixing assembling, the non-calibrating tandem type light is obtained
Fine grating temperature sensor.
2. non-calibrating tandem type fiber grating temperature sensor preparation method as described in claim 1, which is characterized in that described
Horizontal base plate has at least one groove.
3. non-calibrating tandem type fiber grating temperature sensor preparation method as claimed in claim 1 or 2, which is characterized in that
The horizontal base plate has multiple grooves for producing in batches.
4. non-calibrating tandem type fiber grating temperature sensor preparation method as claimed in claim 3, which is characterized in that described
Multiple grooves are arranged side by side.
5. non-calibrating tandem type fiber grating temperature sensor preparation method as described in claim 1, which is characterized in that described
Package core part both ends are the cylindrical body with through-hole, and middle part is recess portion, and the recess portion, which has, determines high standard part for being arranged
Predeterminated position.
6. non-calibrating tandem type fiber grating temperature sensor preparation method as claimed in claim 5, which is characterized in that described
Recess portion described in package core part is semicylinder.
7. non-calibrating tandem type fiber grating temperature sensor preparation method as described in claim 1, which is characterized in that described
High standard part height is determined more than 125 microns of described recess depths or more.
8. non-calibrating tandem type fiber grating temperature sensor preparation method as claimed in claim 7, which is characterized in that described
Determining high standard part is strip.
9. non-calibrating tandem type fiber grating temperature sensor preparation method as claimed in claim 8, which is characterized in that described
High standard part cross section is determined for semicircle.
10. non-calibrating tandem type fiber grating temperature sensor preparation method as described in claim 1, which is characterized in that institute
Stating package casing part is metal material.
11. one kind is according to such as claims 1 to 10 any one non-calibrating tandem type fiber grating temperature sensor preparation method
The non-calibrating tandem type fiber grating temperature sensor of preparation, which is characterized in that including package casing part, package core part, with
And it is carved with the optical fiber of grating；The optical fiber is fixed with the package core part, and grating is exposed in the package core part
Portion slots the recess portion to be formed and in relaxed state；The package casing part is nested with the package core part of the optical fiber is fixed with
It is fixed on outside the package core part；The optical fiber is in the part of recess portion, and length is more than that recess length is no more than 1mm.
12. non-calibrating tandem type fiber grating temperature sensor as claimed in claim 11, which is characterized in that in the encapsulation
Core part both ends are the cylindrical body with through-hole, and middle part is recess portion, are had for the predeterminated position for determining high standard part to be arranged, and are stainless
Steel, copper alloy, aluminium alloy or ceramic member.
13. non-calibrating tandem type fiber grating temperature sensor as claimed in claim 12, which is characterized in that in the encapsulation
It is semicylinder in the middle part of core part.
14. non-calibrating tandem type fiber grating temperature sensor as claimed in claim 11, which is characterized in that outside the encapsulation
Shells, internal diameter are matched with the diameter of the package core part, and the package core part is enabled to be inserted in the package casing
Part.
15. non-calibrating tandem type fiber grating temperature sensor as claimed in claim 14, which is characterized in that outside the encapsulation
Shells both ends have the screw thread for being threadedly engaged with optical cable fixing piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006367.2A CN108204866B (en) | 2018-01-04 | 2018-01-04 | A kind of non-calibrating tandem type fiber grating temperature sensor preparation method and product |
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| US5193129A (en) * | 1991-09-27 | 1993-03-09 | Rockwell International Corporation | Pressure sensor utilizing microbending of a fiber optic cable woven through a ladder shaped structure |
| CN201935753U (en) * | 2010-12-31 | 2011-08-17 | 聚光科技(杭州)股份有限公司 | Fiber grating temperature sensor |
| CN102213625A (en) * | 2010-04-07 | 2011-10-12 | 上海启鹏工程材料科技有限公司 | Fiber bragg grating temperature sensor |
| CN103076108A (en) * | 2012-11-26 | 2013-05-01 | 中国电力科学研究院 | Novel power cable conductor temperature measuring sensor based on FBG (fiber bragg grating) |
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| EP2350715A4 (en) * | 2008-09-10 | 2012-03-14 | Lake Shore Cryotronics Inc | Compact fiber optic sensors and method of making same |
| CN102297706A (en) * | 2011-05-24 | 2011-12-28 | 黄堃 | Fiber bragg grating sensor with metal packaging and manufacturing method thereof |
| CN202494531U (en) * | 2012-02-28 | 2012-10-17 | 上海紫珊光电技术有限公司 | Packaging piece capable of avoiding stress and enhancing sensitivity for FBG grating temperature sensor |
| CN204855018U (en) * | 2015-06-25 | 2015-12-09 | 上海拜安传感技术有限公司 | Optical iber grating temperature sensor |
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| US5193129A (en) * | 1991-09-27 | 1993-03-09 | Rockwell International Corporation | Pressure sensor utilizing microbending of a fiber optic cable woven through a ladder shaped structure |
| CN102213625A (en) * | 2010-04-07 | 2011-10-12 | 上海启鹏工程材料科技有限公司 | Fiber bragg grating temperature sensor |
| CN201935753U (en) * | 2010-12-31 | 2011-08-17 | 聚光科技(杭州)股份有限公司 | Fiber grating temperature sensor |
| CN103076108A (en) * | 2012-11-26 | 2013-05-01 | 中国电力科学研究院 | Novel power cable conductor temperature measuring sensor based on FBG (fiber bragg grating) |
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