CN106643542B - Fiber Bragg grating type sensor - Google Patents
Fiber Bragg grating type sensor Download PDFInfo
- Publication number
- CN106643542B CN106643542B CN201611225873.8A CN201611225873A CN106643542B CN 106643542 B CN106643542 B CN 106643542B CN 201611225873 A CN201611225873 A CN 201611225873A CN 106643542 B CN106643542 B CN 106643542B
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- shell
- optical fiber
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- weight
- grating
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- 239000000835 fiber Substances 0.000 claims abstract description 62
- 239000013307 optical fiber Substances 0.000 claims abstract description 54
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000001727 in vivo Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
The present invention relates to Slope Slidings to monitor field, discloses a kind of fiber Bragg grating type sensor, which includes: shell (3)；Weight (4), the weight (4) setting is internal in the shell (3) and can swing when the shell (3) are tilted relative to the shell (3)；Optical fiber, fiber grating is provided on the optical fiber, and the optical fiber is individually fixed in the weight (4) and the shell (3) in the position close to the fiber grating both ends；Wherein, one end of the optical fiber is pierced by the shell (3).By, when side slope slides, can be realized the monitoring of side slope sliding using sensor provided by the invention, has the characteristics that compact-sized and high sensitivity.
Description
Technical field
The present invention relates to Slope Slidings to monitor field, and in particular, to a kind of fiber Bragg grating type sensor.
Background technique
Highway, Along Railway high gradient slope the events such as side slope slump may occur, safety to people and traffic fortune
Defeated safety threatens, therefore, particularly significant to the deep slippage or deformation monitoring of high gradient slope.Typical side slope deep at present
Sliding monitoring sensor has condenser type or eddy current type displacement sensor.Slippage is measured by electric transducer and turns slippage
It is changed to electric signal input analytical equipment to be calculated, finally obtains deep slippage amount.But there are leakproofness for electrical type sensor
Difference, easily electric leakage, it is perishable, by electromagnetic interference, vulnerable to lightning stroke the problems such as, there are many problems in practical engineering applications.
The problem of fibre optical sensor is sensed and is transmitted using optical signal, and above-mentioned electrical type sensor is not present, in recent years
Carry out more and more use for using the monitoring of side slope deep slippage on the way.Chinese patent (publication number CN102288162) discloses one
Kind fiber Bragg grating type sensor, using cantilever beam structure, this sensor is needed first with biggish mass block and lesser cantilever
Beam could or higher sensitivity be not easy to install to limit the size of sensor, while biggish mass block and compared with
Small cantilever beam results in the biggish amount of deflection of cantilever beam, eventually lead to sensor output be it is non-linear, not can guarantee sensitivity.
Therefore, it is necessary to a kind of compact-sized and high sensitivity sensors.
Summary of the invention
The object of the present invention is to provide a kind of equipment, which can be realized the monitoring of side slope sliding, have structure tight
It gathers and the characteristics of high sensitivity.
To achieve the goals above, the present invention provides a kind of fiber Bragg grating type sensor, which includes: shell；Weight
Hammer, weight setting is in the enclosure interior and can swing when the shell is tilted relative to the shell；Optical fiber, it is described
Be provided with fiber grating on optical fiber, the optical fiber the position close to the fiber grating both ends be individually fixed in the weight and
The shell；Wherein, the optical fiber at least one end is pierced by the shell.
Preferably, the optical fiber includes: the first optical fiber and the second optical fiber；Wherein, the fiber grating of first optical fiber and
The fiber grating of second optical fiber is located at the opposite side of the weight.
Preferably, the shell includes top cover and the base portion that is fixed on the top cover, and the optical fiber is close to described
The base portion is fixed at one end of fiber grating.
Preferably, axis is provided on the shell, the weight is rotatably mounted in the axis.
Preferably, the base portion includes the supporting plate being fixed on the top cover and the bottom that is arranged between the supporting plate
Seat, the axis are fixed between the supporting plate.
Preferably, the locating slot for positioning the fiber grating is provided on the side of the weight.
Preferably, the access apertures for penetrating the fiber grating is provided on the top cover；And/or the shell
Including bottom cover, the hole for being pierced by the fiber grating is provided on the bottom cover.
Preferably, the sensor is fixed in external shell, and multiple fiber gratings, Duo Gesuo are provided on the optical fiber
It states fiber grating and corresponds to multiple shells, the optical fiber with (FBG) demodulator for connecting.
Through the above technical solutions, sensor provided by the invention can be set in the inclinometer pipe of embedment side slope, In
When side slope slides, the shell of the sensor can run-off the straight therewith so that occurring opposite to incline between weight and shell
Tiltedly, so that the fiber grating being fixed between shell and weight deformation occurs and outside is transmitted in the form of optical signal,
To monitor the sliding of side slope.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the housing interior structure of sensor according to the preferred embodiment of the present invention；
Fig. 2 is the schematic diagram of the sensor external structure in Fig. 1；
Fig. 3 is the schematic diagram of the arrangement form of the shell of the sensor in multiple Fig. 1.
Description of symbols
1 first optical fiber, 2 second optical fiber
3 shell, 4 weight
5 top cover, 6 axis
7 pedestal, 8 supporting plate
9 access apertures, 10 hole
11 fastener hole, 12 pilot hole
13 bottom cover, 14 locating slot
15 (FBG) demodulators
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of sensor, which includes: shell 3；Weight 4, the weight 4 are arranged in the shell 3
Inside can simultaneously be swung when the shell 3 is tilted relative to the shell 3；Optical fiber is provided with fiber grating on the optical fiber,
The optical fiber is individually fixed in the weight 4 and the shell 3 in the position close to the fiber grating both ends；Wherein, described
Optical fiber at least one end be pierced by the shell 3.Sensor provided by the invention can be arranged need to carry out sliding prison in embedment
In the inclinometer pipe of the side slope of survey, when side slope slides, which can occur corresponding inclination with the sliding of side slope, i.e.,
With shell 3 opposite inclination occurs for 3 run-off the straight of shell, weight 4 under gravity, due to the both ends on fiber grating point
It is not fixed on weight 4 and shell 3, therefore opposite deformation can occur for fiber grating, changes the output wavelength of fiber grating.Pass through
Optical fiber light is monitored using external detection equipment (such as (FBG) demodulator, one end for being pierced by shell 3 of optical fiber can connect to (FBG) demodulator)
The output wavelength of grid can monitor the sliding of side slope.
Wherein, the both ends of fiber grating can be separately fixed at weight 4 and shell 3 by mode appropriate, for example use glue
Water is pasted or with bolt fastening, which should be under normal circumstances also slightly tight state, to make to slide
Corresponding deformation can significantly occur for fiber grating when generation.The shell 3 should be also made of corrosion-resistant material, to adapt to
The moist environment of soil inside side slope.
In practical applications, the case where further encountering the direction for needing to distinguish Slope Sliding, in order to meet the demand, preferably
Ground, the optical fiber include: the first optical fiber 1 and the second optical fiber 2；Wherein, the fiber grating of first optical fiber 1 and second light
The fiber grating of fibre 2 be located at the opposite side of the weight 4, first optical fiber 1 at least one end and second optical fiber 2 to
Rare one end is pierced by the shell 3.That is the first optical fiber 1 includes that both ends are individually fixed in the first of the weight 4 and the shell 3
Fiber grating；Second optical fiber 2 includes the second fiber grating that both ends are individually fixed in the weight 4 and the shell 3.
Since the fiber grating of two optical fiber is separately positioned on the opposite side of weight 4, incline in weight 4 relative to shell 3
When oblique, two fiber gratings necessarily have a meeting to be stretched, and a meeting relaxes, so that the first fiber grating and second
Different variations occurs for the output wavelength of fiber grating, by the direction for analyzing and determining out Slope Sliding to the variation, in addition,
The setting form of a two optical fiber more individual optical fiber can also have greatly improved in sensitivity, and the present invention does not limit
In use one or two optical fiber, the arrangement form of the multifiber of any feasibility protection scope of the present invention it
It is interior.
Fiber grating provided by the invention can be used form appropriate and be arranged on shell 3, it is preferable that the shell 3 wraps
The base portion for including top cover 5 and being fixed on the top cover 5, the optical fiber are fixed on institute at one end close to the fiber grating
State base portion, internal stretch from the base portion to shell 3 and can be fixed on top cover 5 by the pilot hole 12 on top cover 5, In
When 3 run-off the straight of shell, the base portion is with 3 run-off the straight of shell, so that being fixed on the light between base portion and weight 4
Deformation occurs for fine grating.
In order to realize the relative tilt when shell 3 tilts between weight 4 and shell 3, also it may be preferred that the shell 3
On be provided with axis 6, the weight 4 is rotatably mounted in the axis 6.In 3 run-off the straight of shell, work of the weight 4 in gravity
It is swung with lower around axis 6, to realize the relative tilt between shell 3.Wherein, fiber grating is fixed on one on weight 4
End can be selected and be fixed on the part of the circular axis 6 on weight 4, and shell 3 should have receiving weight 4 to swing in the appropriate range
Space, so as to be monitored to sliding more side slope.
Its axis 6 can be arranged in shell 3 using mode appropriate, it is preferable that the base portion includes being fixed on institute
The pedestal 7 stating the supporting plate 8 on top cover 5 and being arranged between the supporting plate 8, the axis 6 are fixed between the supporting plate 8.Branch
Plate 8 is to be fixed on two boards on top cover 5 and vertical with top cover 5, and the mounting hole for connecting shaft 6 is provided on supporting plate 8, wherein
Pedestal 7 is fixed between two pieces of supporting plates 8, and grating fibers can be set on two other opposite sides of pedestal 7.
In addition, being opened on supporting plate there are two fastener hole 11, when (such as in transit) without using the sensor, in order to anti-
Only the swing of weight 4 causes optical fiber to be destroyed during transport etc., and the fasteners pair such as bolt can be arranged in fastener hole 11
Weight 4 is limited, and the swing of weight 4 is prevented, so that induction part be prevented to be damaged because excessively swinging.
Optical fiber can pass through weight 4 using mode appropriate, it is preferable that be provided on the side of the weight 4 for fixed
The locating slot 14 of the position fiber grating, the locating slot 14 can run through the side of weight 4, and grating fibers can be embedded in fixed with being pierced by
In the slot 14 of position.It should be noted that weight 4 is preferably shaped to square cylinder, but it's not limited to that by the application, can also select
With cylindrical body or irregular cylinder, and equally locating slot can be set on the weight of these shapes, these are in the present invention
Protection scope within.
The fiber grating of sensor of the invention can be used mode appropriate and be pierced by shell 3, it is preferable that on the top cover 5
It is provided with the access apertures 9 for penetrating the fiber grating；And/or the shell 3 includes bottom cover 13, on the bottom cover 13
It is provided with the hole 10 for being pierced by the fiber grating.The fiber grating of the sensor of the application is from being passed through on top cover 5
Hole 9 penetrates in shell 3, and the optical fiber is individually fixed in the weight 4 and institute in the position close to the fiber grating both ends
State base portion (shell 3).
Also it may be preferred that as shown in figure 3, the sensor is fixed in external shell (such as inclinometer pipe), on the optical fiber
Multiple fiber gratings are provided with, multiple fiber gratings correspond to multiple shells 3, and the optical fiber is used to connect with (FBG) demodulator 15
It connects.In practical applications, the multiple fiber gratings of fiber grating series connection, the corresponding sensing of each fiber grating are usually utilized
Device unit, these sensor units can be set in the inside of the same external shell, for example be fixed on same with inclinometer pipe
On inner wall, which can be pierced by the sensor unit by the hole 10 on the bottom cover 13 of each sensor unit
Corresponding shell 3, thus realize this configuration mode, and finally make the output wavelength of optical fiber and extraneous detection fiber grating
(FBG) demodulator 15 connects.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (6)
1. a kind of fiber Bragg grating type sensor, which is characterized in that the sensor includes:
Shell (3)；
Weight (4), the weight (4) setting is internal in the shell (3) and can be when the shell (3) are tilted relative to described
Shell (3) is swung；
Optical fiber, fiber grating is provided on the optical fiber, and the optical fiber is solid respectively in the position close to the fiber grating both ends
Due to the weight (4) and the shell (3)；
Wherein, the optical fiber at least one end is pierced by the shell (3), and the shell (3) includes top cover (5) and is fixed on described
Base portion on top cover (5), the optical fiber are fixed on the base portion, the shell at one end close to the fiber grating
(3) it is provided on axis (6), the weight (4) is rotatably mounted in the axis (6).
2. sensor according to claim 1, which is characterized in that the optical fiber includes:
First optical fiber (1) and the second optical fiber (2)；Wherein, the fiber grating and second optical fiber (2) of first optical fiber (1)
Fiber grating be located at the opposite sides of the weight (4).
3. sensor according to claim 1, which is characterized in that the base portion includes being fixed on the top cover (5)
Supporting plate (8) and pedestal (7) between the supporting plate (8) is set, the axis (6) is fixed between the supporting plate (8).
4. sensor according to claim 1, which is characterized in that be provided on the side of the weight (4) for positioning
The locating slot (14) of the fiber grating.
5. sensor according to claim 1, which is characterized in that be provided on the top cover (5) for penetrating the light
The access apertures (9) of fine grating；And/or the shell (3) includes bottom cover (13), is provided on the bottom cover (13) for wearing
The hole (10) of the fiber grating out.
6. sensor described in any one of -5 according to claim 1, which is characterized in that the sensor is fixed on external shell
In vivo, multiple fiber gratings are provided on the optical fiber, multiple fiber gratings correspond to multiple shells (3), the light
Fibre with (FBG) demodulator (15) for connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611225873.8A CN106643542B (en) | 2016-12-27 | 2016-12-27 | Fiber Bragg grating type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611225873.8A CN106643542B (en) | 2016-12-27 | 2016-12-27 | Fiber Bragg grating type sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106643542A CN106643542A (en) | 2017-05-10 |
| CN106643542B true CN106643542B (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611225873.8A Active CN106643542B (en) | 2016-12-27 | 2016-12-27 | Fiber Bragg grating type sensor |
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| CN (1) | CN106643542B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036769A (en) * | 2018-01-11 | 2018-05-15 | 盐城工学院 | A kind of distinguishable direction from temperature compensation fiber grating deviational survey sensor |
| CN110274576B (en) * | 2018-03-13 | 2021-04-30 | 中国石油化工股份有限公司 | Floating disc inclination angle calculation and measurement method and system for floating roof storage tank and application |
| CN108755616B (en) * | 2018-08-22 | 2024-02-20 | 江苏省水利勘测设计研究院有限公司 | Optical fiber sensor buries protective device |
| CN109470211A (en) * | 2018-10-18 | 2019-03-15 | 中际物联科技（深圳）有限公司 | A kind of novel optical fiber inclination sensor of stretching structure |
| CN113639649A (en) * | 2021-08-10 | 2021-11-12 | 合肥市光感芯科技有限公司 | Strain type roof separation layer sensor based on fiber bragg grating |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539408A (en) * | 2009-05-07 | 2009-09-23 | 大连理工大学 | Fiber grating inclination sensor of temperature self-compensation type |
| CN102288162A (en) * | 2011-05-23 | 2011-12-21 | 南京航空航天大学 | Tilt angle sensor based on optical fiber Bragg gratings and method for measuring tilt angle of tilt angle sensor |
| CN204177381U (en) * | 2014-09-01 | 2015-02-25 | 南昌工程学院 | A kind of fiber bragg grating inclinometer device |
| CN105180900A (en) * | 2015-08-28 | 2015-12-23 | 中国科学院半导体研究所 | Fiber clinometer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007205740A (en) * | 2006-01-31 | 2007-08-16 | Tobishima Corp | Tiltmeter using fbg optical fiber sensor |
| JP4883802B2 (en) * | 2007-08-30 | 2012-02-22 | 飛島建設株式会社 | FBG optical fiber sensor type inclinometer |
| KR101083360B1 (en) * | 2009-10-06 | 2011-11-15 | (주)카이센 | Inclinometer using Fiber Bragg Grating Sensor |
-
2016
- 2016-12-27 CN CN201611225873.8A patent/CN106643542B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101539408A (en) * | 2009-05-07 | 2009-09-23 | 大连理工大学 | Fiber grating inclination sensor of temperature self-compensation type |
| CN102288162A (en) * | 2011-05-23 | 2011-12-21 | 南京航空航天大学 | Tilt angle sensor based on optical fiber Bragg gratings and method for measuring tilt angle of tilt angle sensor |
| CN204177381U (en) * | 2014-09-01 | 2015-02-25 | 南昌工程学院 | A kind of fiber bragg grating inclinometer device |
| CN105180900A (en) * | 2015-08-28 | 2015-12-23 | 中国科学院半导体研究所 | Fiber clinometer |
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| CN106643542A (en) | 2017-05-10 |
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